How To Use And Operate ( Operational Guide 11 )

Use and Operation:
5.1 The preparative work before starting up:
Before producing, should ask the technician to check the machine, add the lubricating oil, clear up the sundries, etc., and make the preparation work.
1. Check all equipments and solve the problems in time if have.
2. Prepare the feeder and the transportation vehicles well.
3. All the staff should be at their own position.
4. Check the pre-storing of various raw materials (aggregates, filler, bitumen, etc.) that the production needs, should purchase if being insufficient.
5.2 Operation and regulation of starting the machine:
The order of starting:
Turn on the bitumen circulation pump at first →→→Air-introduced machine of dust remover →→→Air compressor →→→Shut off the discharging gate of mixer →→→Mixer →→→Closed round vibration sifter →→→Hot aggregate elevator →→→Filler elevator →→→Dry roller →→→Coal burning system (not add the coal) →→→Water-spray system of dust remover →→→Gradient belt feeder →→→Small vibration sifter →→→Aggregate feeder →→→Ignition and heating (coal powder) →→→After the flame is stable →→→Put into the aggregates to produce normally.
Attention:
1. During the course of starting, there should be the intervals of 15-20 seconds between every start in order to reduce the waving of voltage.
2. While using the sack cleaner, should add the aggregates first, then light a fire until the aggregates enter into the inlet of the hot aggregate elevator, then goes on heating. Now pay more attention to preventing the flame temperature from being too high, it is apt to cause the damage of the sack.

5.3 Operation regulating and attentions of the continuous production:
1. For the aggregates in the hopper of feeder, should be a full state and add in time, shouldn’t be less than half a hopper at least, otherwise will appear the uneven phenomenon. The ore powder also should be added in time for preventing the ore powder from being condensed, try hard to avoid the ore powder staying in the temporary storage too long.
2. According to the feeding state of the spewing mouth, adjust the matched proportion of the aggregate feeder so that reach the needed proportion. Namely, should drop down the rotating speed of motor according to the specification of the spewing materials.
3. The operation, regulation and attentions of the burning system:
Start unloaded every parts first before putting into production, shut off the damper of burner, then open the fire-introduced valve to light a fire. At the moment, shouldn’t open the air-blower, the damper of air-introduced machine should be the smallest, open the valve of oil nozzle to fire. Here, the coal is fired in the burning room, preheat the dry roller, shut off the valve of the fire-introduced device after the flame is stable, and stop to supplying the diesel oil for avoiding the ignition’s insufficiency, then start the other unit, begin to add the cold aggregate. When the aggregates in the hot aggregated storage reach a certain quantity, begin to scale the aggregates and go on mixing to producing.
Attentions: For the fuel ignition device, oil amount should be small while lighting a fire, and the damper should be smaller than the damper when it works normally; If one-time ignition fails, should shut off the loop rapidly, and open the damper to blow the storing oil in the hearth and then can go on firing again, especially for the hot stove, because the uninflammable oil fog enter into the hearth (or dry cylinder), it will boil off if meeting the heat, it is very much easy to make the stove burst. So after firing successfully, adjust to the needed oil amount and the wind pressure, when the coal are fired in burning room, the flame is stable, shut off the total valve of the ignition device to stop supplying for the diesel oil, here the coal burner can work normally and can add the cold aggregates.
4. Pay attention to adding the bitumen regularly, and guarantee the bitumen temperature in the tank and the feeding temperature should be between 120 -150℃ (or confirm according to the needs).
5.Check the operating situation at any time, advert the temperature and the wave of current in the meter, unusual strike, noise, whether the lubricating oil is sufficient; Whether the belt and chain run steadily; For the belt and chain, it isn’t permit to deviate from the drive groove, especially the belt of the air compressor.
6. While running, only the operator can enter the monitoring room (operation room). The repairman, keeper should put on the safe helmet when enter into the construction field, shouldn’t wear the loose-bodied clothes, pay attention to the security at any time for guaranteeing the safe operation. Especially, shouldn’t be closed to the running parts, swing parts, drive belt, vibration part, spring position, etc., as well as the idler, bitumen pipeline so as not to cause the brush-burn, scald etc..
7. Pay attention to observing the distance between the vehicles and equipments; forbid taking place the impact accidents.
8. After launder the bitumen pipelines with the diesel oil, should let out the residual diesel oil in the bitumen measuring hopper in time, otherwise it is apt to explode after mixing with the hot bitumen.
5.4 Operation of normal parking and attentions:
The principle of normal parking: Should clear up the storing materials (except for the aggregate feeder, hot aggregate storage) when using up the bitumen in the bitumen measuring tank, and prevent the filler from storing for a long time, can encapsulate separately to prevent the ore powder from being made moist, congeal, consequently influence the transportation.
Should " Clear up " before shutting down, namely use the aggregates of several kinds of specifications reserved, had better no less than three kinds of specifications, the weight is no less than 0.5 tons. In the beginning, use the aggregates of the big specification, then use the aggregate of the small specification, finally use the sand, just like this, can clear up the remaining bitumen in the mixer, the aggregates passed cleaning can still continue to be use, so should send into the corresponding storehouses according to their specifications.
The order of normal parking:
Shut off the bitumen circulation pump first, then overturn for 5 minutes (draw back the bitumen in the pipeline to the bitumen tank) →→→Aggregate feeder →→→ Gradient belt feeder →→→Hot aggregate elevator (Carry out the aggregates in dry roller) →→→Closed round vibration sifter →→→Mixer →→→Burner →→→Ten minutes later, stop dust remover to spray the water →→→Air compressor →→→15 minutes later, stop the air-introduced machine →→→Dry roller →→→(shut down for a long time), let out the remaining bitumen in the measuring tank (The unmarked time interval is about 20-25 seconds).
Open the discharging gate of the mixer, don’t be in the position of shutting off, it is difficult to restart the mixer because of the residual condensed bitumen. So please shut off the discharging gate before the mixer restarts again.
It isn’t need to clear up or maintain when the machine put into production after normal parking 1 hour later, but should discharge the remaining bitumen in the tank so as not to condense

Groundwork And Instalation ( Operatioanl Guide 10 )

Groundwork construction and installation debugging
4.1 Construction of groundwork
Before installing, the user can select and layout the place according to the plane chart that our company offered (or inform our technician and erector go to the building site for guiding), line according to the layout size, make the groundwork well and per-remain the bolt holes; It is permit to install the equipments after the groundwork congealed.
User should have whole, reasonable planning to the place, the position of mixing plant should be convenient for transporting, should reserve the position of the materials field and the bitumen pot. The monitoring room should be in the place that is apt to observe the running situation of the complete machine, the aggregate feeder should be in the place where is easy to feeding.
According to the requests of our company at the same time, the needed place and equipments are as follows:
1. Offer the needed crane, crowbar, rope, etc for unloading temporarily and installing, 25 tons of crane is ok.
2. Offer the temporary storing place that the installation of small parts need, and require a special person to manage.
3. Offer the needed equipments. Just as the welding machine, temporary lighting, power electric junction box, etc.
4. Offer the accommodation for erectors.
5. Arrange 4-6 workers to cooperate with the work of installation and debugging.
6. Make sure 2 operators and 2 technicians to install corporately in advance in order to be familiar with the installation and debugging.
7. Arrange a principal to communicate and consult with our company in time in order to handle with various incidents that are unfavorable to install in time.
4.2 Installation
The installation of the equipment is mainly going on under the instructions of our technician.
4.2.1 The installation of the mixing plant and its parts
First install the width platform, railings and ladder of the hot aggregates storage and mixing layer; put the four braces on the bolts, hang the second layer (the mixing layer) to the braces and fix them well; then fix the anchor bolts, hang the three layer ( the hot aggregate storage layer) to the second layer and fix them well too; finally fix the closed round vibration sifter with the bolts; Now it is time to install the overflow pipe in turn from top to bottom and seal them. Notice to guarantee the upright degree of the mixing plant while installing.
Attentions: In the course of installation, should notice to install the elastic washer to every bolts and screw them tightly; the connections of parts and parts should be adjusted well and seal for preventing the dusts from overflowing.
4.2.2 The installation of hot aggregate elevator:
After fixing the mixing plant well, should install the attachments such as upper platform and railings, etc first, then wind up the upper of elevator with the crane, link with the medium shell and its underside from top to bottom, then take the mixing plant as the reference object to fix the hot aggregate elevator and fix each bolt well. When installing, the outlet of elevator should be connected with the entrance of the closed round vibration sifter directly and seal reliably in order to prevent from overflowing; it should be filled with the asbestos strings between the flange of shell.
4.2.3 The installation of the dry roller and burning system:
For the dry roller, should take the Mixing plant as the reference object to fix its position and burner. While installing, its outlet should be connected with the entrance of the hot aggregate elevator directly and seal reliably in order to prevent from overflowing
The position of burner should be close to the feeding outlet of dry roller, the fire outlet should be connect with the ignition mouth of dry roller directly, besides, should layout the place of the burning materials reasonably, as regards the coal burner, should also confirm the storing place of fuel for preventing being caught in the rain.
4.2.4 The installation of the filler elevator:
First install the attachments such as the upper platform and railings, etc of the elevator, then wind up the upper of elevator with the crane, link with the medium shell and its underside from top to bottom, and then take the mixing plant as the reference object to fix the hot aggregate elevator and fix each bolt well. When installing, the outlet of the hot aggregate elevator should be connected with the entrance of the ore powder interim bin directly and seal reliably in order to prevent from overflowing; it should be filled with the asbestos strings between the flange of shell.
4.2.5 The installation of the cold aggregate feeder system
After fixing the dry roller, can fix the gradient belt feeder, medium filter, aggregate feeder in turn. The connection should be accurate for guaranteeing the feeding passages of the cold aggregate are unblocked and leave a certain distance for throwing materials.
4.2.6. The installation of bitumen feeder system
Emplace the bitumen tank (if users choose the oil-unloading tank and heat preservation tank, should install them in turn); the concrete position is outside the roller. Just like this not only can shorten the length of the connecting pipeline, reduce the thermal losses, but also can make the bitumen easy to mix.
4.2.7 The installation of the water film dust-removing system
First of all, emplace the one-grade single-cylinder cyclone dust catcher. Should fix the underbed first, and then install the single- cylinder cyclone dust catcher.
Second, install the wet type dust-catcher. Should check whether every nozzle link reliably, link with the chimney, water film dust-catcher and the downside water fog dust-catcher in turn, and then connect with the pipe water inlet, at last hang it in the right position.
Third, Place air-introduced machine, connect with the pipelines of dust removing. The connection of the pipelines should be right.
Finally, Install water -supply system, the attachments and pipelines.
4.2.8 The installation of gas flow system:
Attention: While connecting the dust-remover and its pipelines, should fill with the asbestos strings in the flanges for preventing the dust from overflowing or leaking gas.
The installation: Confirm the connection of every component. Should daub the sealant on the joints, and wrap up with the raw material belt in order to ensure its sealed performance.
Attention: Should pay attention to cleaning. Before installing, every pipelines should be blow off, while joining and installing the attachments, should prevent the foreign matters or the dust from entering.
4.2.9 The installation of the monitoring room:
The monitoring room should be in the place where is apt to observe the running of the complete machine, also can observe the situation of vehicles, and can command the vehicles optionally.
4.2.10 The allocation of electric control circuitry:
Can allocate the electric control circuitry by electric engineer after installing all equipments, and dig out the cable trench in the allocation position, and make sure all the joints are reliable.
4.3 Check:
Check whether the installation is correct for every part, whether there is mistake, displacement and omission, whether the localization is firm.
Tips show as follows:
1. The fastening situation of the dry roller, the supported wheel, rolling rings and inner scraper.
2. Whether the bolts on the closed round vibration sifter, the bolts on the motor bracket and the transducer bolts are tightened.
3. Whether the bolts on the mixing arm and the bolts between the vanes are tightened.
4. Sealing performance of dust -remover’s pipeline.
5. Check the sealed situation of air hose, screw gate and every flange joints.
6. Check the fixed situation of the bitumen pipeline joints and flange connection bolts.
7. Check the fastness of the elevator running system, the connection of the medium parts, the fastness of the elevator shell; the elasticity of the elevator chain; if the chain is too loose, can tight it with the underside take-up device.
8. Check the operating parts. Rotate each part by hand, check whether the operation is normal, whether there is any impact, interference, stagnation, lean and other phenomenon, check the elasticity of the chain, belt, etc.
9. Check its lubricated situation; check whether the speeder, bearing, air flow, etc. are adding the oil according to the lubrication table.
10. Check whether the bitumen pipelines are unobstructed, the break-make direction of three-way valve is correct.
11. Check whether the bitumen tank and oil tank are dry, if have any condensed water, should make it clean.
12. Check whether there is the dangerous articles on the device, for instance the bolt, nut, spacer, cotton yarn, iron wire, etc., in order to avoid falling into the drive system and cause the accident and breakdown during the course of production.

4.4 Debugging:
Install all the parts well, connect the power line, go on testing run alone to every part, then carry on unloaded testing run, testing run of feeding so that confirm every system (parts) have no question and trouble and can run normally.
The method as follows:
1.Put through the mixer, closed vibration sifter, hot aggregate elevator, dry roller, the gradient belt feeder, medium filter, aggregate feeder in turn, then go on unloaded testing run and assign the special person to check all the systems, if have some problem should solve in time and then can carry on next step.
2. Check whether the fixed bolts in the mixer, the dry roller and the vibration sifter become loose.
3. Check the swing of the round vibration sifter and its sealed situation.
4. The tightening situation of the elevator’s chain and the rolling chain, the meshing situation of big sprocket and the chain.
5. Whether the dry roller runs steadily, whether there is unusual noise.
6. The tightening situation of the gradient belt feeder, the aggregate feeder’s conveyor belt, and the rotating feeder’s conveyor belt, whether there is the deflective phenomenon, the tightening situation of the bolts, etc.
8. Check the elasticity of air compressor’s belt, the operating, the highest output air pressure, working pressure, pipelines, check whether the air three-element runs normally, the machine runs normally.
9. Run unloaded the dust-catcher system, the asphalt feeder system and the ignition system, at this moment the air-blower, air-introduced machine, fuel pump, bitumen pump are all operating, check the operation situation of every part. Meanwhile, can carry on the test of ignition, burning time can't exceed one minute. Also can testing run the bitumen oil-suction pump and bitumen injection pump, observe whether the bitumen loop and the break-make of valves are correct, whether the bitumen can circulate normally, its operating time can't exceed half a minute.
10. After the unloaded running of every system are normal, and then can fill with the aggregates to test.

Technical Flow ( Operational Guide 9 )

Technical flow:
The detailed technical flow is as follows:
First of all, Fill various specifications of cold aggregates in the hopper with the loading machine for primary selecting, at the same time sieve out the unused cold aggregates ( bigger than 40mm or self-decided), finally delivery the qualified cold aggregates to the dry roller by the gradient belt feeder.
The aggregates are heated, dried and mixed in roller fully through the burning system; In the course of drying, the dusts and moisture in the cold aggregates are inhaled in the dust catcher, the dusts are separated out from the dust catcher, a few big grain dusts flow into the hot aggregate elevator automatically through one-grade dust catcher and continue to use; Most slight dust are removed by the water dust remover and flow into the sedimentary pool.
The heated hot aggregates in dry roller will flow into the elevator, then will be sent to the closed round vibration sifter on the mixing plant by elevator, the vibration sifter will divided them into five kinds ( four kinds are qualified materials and one is scrap), then enter into the corresponding hot aggregate storage below the sifter separately. Moreover according to the deferent proportion of aggregates, put every kinds of hot aggregates into the measuring hopper in turn, there are three pull transducers on the top of hopper, the transducers will send the weight sign to the switchboard system, and then weigh up in turn in the aggregate measuring hopper controlled by PLC; The computer controls the start order and time of every storehouse gates and air cylinders, as well as the placement of the measuring hopper.
On the other hand, the new ore powder is added into the feeding inlet of the ore powder elevator by manual, they will be sent into the interim storage by the elevator hopper, then throw in the measuring hopper; there are three pull transducers on the top of measuring hopper, the transducers will send the weight sign to the switchboard system, PLC will control the start and close of air butterfly valve for realizing the placement of ore powder.
Meanwhile, the bitumen is heated in the high-temperature bitumen pot, heat it to about 150°C; Three-way spiral valve is in the position of circulation at the same time, the bitumen begin to circulate. Electric air three-way valve not only can make the bitumen circulate but also can send them to the measuring pot; there are also three pull transducers on the top of measuring pot, the transducers will send the weight sign to the switchboard system, PLC will control the weight of bitumen according to the needed bitumen-aggregate ratio.
Finally, put the weighed aggregates, ore powder and bitumen into the mixer to mix. PLC will control the start order and mixing time of every cylinder, it is divided into three control methods of full-automatic, semi-automatic and manual. When it is up to the stipulated time (general 45 seconds), open the discharging gate of mixer, put the even mixture into the carriage and finish the output

Air flow System ( Operation Guide 8 )

Air flow system

The main composing: An air compressor, a compressed air chamber, the air three-element, the control valve, air rubber tube and air cylinder etc.
Main function: Offer the needed power to every air cylinders and offer the needed compressed air to every devices.
The compressed air that the air compressor produces, pass the disposal of the water separator and oil sprayer (air three-element), make the air device get the pure and dry high-pressure gas. The electromagnetic valves control the moving of every air cylinder to finish the opening and closing of every material gate (or three-way valve).
Attentions:
1. Adjust the output pressure of air compressor to max. 0.8MPa during running.
2. The whole air flow system does not allow having phenomenon of leaking gas.
3. Compressed air bag and three-element water separator should drain one time per man shift.
4. Air three-element oil sprayer should be about 10 drips per minute when running and the oil sprayer can't lack the oil in oil sprayer.
5. Air compressor should be put on the clean place of the mixing plant and forbid contacting the dust.

The structural sketch shows as follows:


11 Dust catcher system
Dust catcher system is consisted of the single-cylinder cyclone dust catcher, combine wet type dust catcher, deposition-pool, submersible pump and attachments, air-introduced pipeline, air-introduced machine, etc. (also can select the sack dust catcher according to the needs)
One grade dust-removing (Dry Cyclone) adopts the single-cylinder cyclone dust catcher, can remove the big grain dusts and send them into the hot aggregate elevator for using directly.
Second grade dust-removing adopts the water-fog dust catcher, can remove the small grain dusts and lighten the load of water dust remover (Wet Cyclone).
Third grade dust-removing adopts the water film dust catcher, can absorb the slight dust in the water, reduce the discharge density of the dust effectively, and make it meet the requirement of national environmental protection.
Its function mainly has three points:
1, Increase the pressure difference of the both ends of dry roller, improve the passing capacity of the hot current, and improve the heating and dry effect.
2, reduce the density of discharging, make the density of smoke and dust discharged accord with the national requirements for environment protection.
3, the wind pipes are connected to the vibration sifter, can remove the dust in the vibration sifter effectively, and offer the negative pressure for the aggregate’s delivery, can reduce the leakage phenomena on every sealed position.
The structural sketch is as follows


12 Electric control system
The electric control system is mainly consisted of the container controlling room (selective), high voltage switch board, and low voltage switch board, control cabinet cupboard, etc.
The main functions: Offer the power supply for the equipments; carry on the monitoring for the productive steps. Can realize the automatic, semi-automatic and manual control.

Vibrating Sistem ( Operational Guide Asphalt Plant 7 )

2.8 Closed round vibration sifter
Closed round vibration sifter is consisted of the sifter, bracket, spring, screen net, sealed cover, vibration axle, motor, belt, etc.
Main function: Put the different specifications of aggregates that passed the heating, screen the aggregates according to the size of grain in order to go on the accurate measurement and match before mixing.
This kind of vibration sifter adopts the structure of the eccentric axle, a 11kw motor drive, the sifter net is three and a half layers, the size of the mesh is 5~37mm, the vibration frequency is about 890 times /m, the swing is 6-8mm, the disturbing force can be adjusted through regulating the superposition of the eccentric block. In addition, it is also equipped with the amplitude indicator on the sides of device; the amplitude should be about 5-7 mm when it operates normally.
The structural sketch of the closed round vibration sifter shows as follows:


Amplitude indicator shows as follows:


The method of observation: The amplitude indicator is shaking with the vibration sifter, we can measure the amplitude according to the optical effect, if appear the black or white cordiform figures will not show the amplitude value, according to the display of the figure: Pattern is for the gray. If do not appear the black or white cordiform figures, you can get the amplitude value from the indicator: The amplitude is 6mm. Or observe the amplitude indicator while operating, the round of 6mm diameter is tangent with its own outer diameter, can also judge the amplitude is 6mm.
The rotating direction of the vibration sifter motor should see the rotating sign. While rotating to the low end from the upside of the belt, the sieving output is high, but the efficiency is low; on the contrary, the sieving output is low, but the efficiency is high, you can choose according to the debugging situation.
Notes: The amplitude should not be too high so as not to wear and tear the bearings; should add the lubricating oil in time at the same time, recommend adding one time every four hours

Mixing Plant ( Operational guide 6 )

Main Mixing plant

This system mainly includes: Hot aggregates storehouse total, mixing layer total.
2.7.1 Hot aggregate storage total
Hot aggregate storage is consisted of the bin, gate, air cylinder, overflow pipe, level meter, thermometer, etc. it is mainly using for store the sifted hot aggregates, in addition, there is an air cylinder controlled by the electromagnetism valve on the bottom of each storehouse to offer the quantitative aggregates. Moreover every room of the material storehouse is equipped with the level meter, which can adjust the feeding speed of the feeder. When the storehouse is full, it can overflow the surplus aggregates through each outlet of the hot aggregate storage, and delivery them to the mixing plant; now there is the pressure –relief pipeline in the hot aggregates storage, it can make the inner pressure release through the pipeline and avoid the dust to flying out. Finally there are four overhauling stations on the one side of the hot aggregate storehouse, and matched with the ladder, easy to overhaul and maintain.
Ore powder storage is mainly consisted of the pneumatic butterfly valve and ore powder storing hopper, etc. it is mainly used for weighting up the ore powder in the hopper, put the quantitative filler into the mixer, and then mix them with the hot aggregates and bitumen.
2.7.2 Mixing layer total
This device includes: The principal part of mixing layer, hot aggregate measuring device, filler measuring device, bitumen measuring device, working layer legs and ladder etc.
(1) The measuring device of the stone hot aggregate:
The measuring device of the stone hot aggregate is mainly consisted of the measurer, the pull transducer, air cylinder and emptying door etc. Weigh up the weight through 3 pull transducers, the signal pass the computer, the real aggregate weight reveals on the display screen, the precision: ± 0.5%;
(2), Filler measuring device:
Filler measuring device is mainly consisted of the measurer, the pull transducer, air cylinder and emptying door etc. Weigh up the weight through 3 pull transducers, the signal pass the computer, the real aggregate weight reveals on the display screen, the precision: ± 0.5%;
(3), Bitumen measuring device
It is mainly consisted of the measurer, the pull transducer, air cylinder and bitumen emptying valve etc. Weigh up the weight through 3 pull transducers, the signal pass the computer, the real aggregate weight reveals on the display screen, the precision: ± 0.25%;

Attentions of Installation and debugging:
Notice to make every gates rotate flexibly, it should be accurate to find out the questions and reasons, it should be rational to deal with the problem.
The structural sketch of the mixing plant shows as follows:



Mixer:
The structure composing: It is mainly consisted of the cycloid speed-down motor, chain wheel, chain, synchronous gear, mixing axle, mixing bearing pedestal, mixing arm, mixing vane, shell, upper cover, wear-resisting board, etc. The mixer is the key part of the bitumen mixture mixing equipment. The structural sketch shows as follows:.



Main function: According to a certain matching ratio, mix round the weighed aggregates, filler and bitumen, then mix into the finished materials needed evenly.
The mixer belongs to the horizontal double-axle spiral mixing mode, the vanes, mixing arm and board are all the chromium molybdenum alloy, the mixing arm is the cast steel material, which has very strong anti corrosive and wear-resisting performance, can lengthen its service life greatly. 30kW speed- down motor can mix the aggregates, filler and bitumen fully through the function of chain wheel, chain, synchronous gear, mixing axle and vanes, and then make the finished material

Bitumen Feeder System ( Operational Guide Asphalt Plant 5 )

2.5 Bitumen feeder system
The main composing: Bitumen manifold, high viscous heat-preservation bitumen pump, 3-way valve, the bitumen measuring hopper, bitumen nozzle, heat-preservation sleeve, etc.
Main functions: Offer and delivery the quantitative bitumen.
The structural sketch of the bitumen feeder system shows as follows:
2.6 Bitumen storing system
Bitumen Storing system belongs to the self-selected parts, the user can purchase freely according to whether own the bitumen storage, the purchase cycle, whether need to heat the bitumen, etc. We generally recommend choosing 30t high-temperature bitumen tank + 50t heat-preservation bitumen tank (must also purchase the heating device)

Hot And Filler Elevator ( Operational Guide Asphalt Plant 4 )

2.3 Hot aggregate elevator
The structure composing: Adopt the scoop upright lifting structure, it is consisted of the framework, the conveyor chain, active (passive) wheel, lifting hopper, fastening device and the outer cover, etc.
Main functions: Lift the heated hot aggregates to the vibration sifter on mixing plant for sifting.
Its rated feeding capacity is 100t/h, the active and passive wheels are all adopting the chain wheel for improving its transmission efficiency; Hopper edge is strengthened board, the inlet and outlet are all the wear-resisting reinforcing steel bars, the lifting hopper is driven through the cycloid speeder, there is installed the clack valve at the ends of the active axe. The upper of the hot aggregate elevator is the overhauling platform; the repairman can maintain and overhaul the machine safely and conveniently at there. There is installed the bearing –slide on the underside passive axle; can tighten the feeding chain with the bar.
The structural sketch of the hot aggregate elevator shows as follows


4 Filler elevator:
Main composing: Framework, feeding chain, active (passive) wheel, lifting hopper, fastening device and outer cover, etc.
Main functions: Lift the filler to the hot aggregates storage on mixing plant for weighing.
Its rated feeding capacity is 20t/h, the active and passive wheels are all adopting the chain wheel to improve the transmission efficiency; Hopper edge is strengthened board, the lifting hopper is driven through the cycloid speeder. The upper of the filler elevator is the overhauling platform; the repairman can maintain and overhaul the machine safely and conveniently at there. It is installed the bearing –slide on the underside passive axle; can tighten the feeding chain with the bar.
The structural sketch of the filler elevator shows as follows:

Dry Roller ( Operarional Guide Of Asphalt Plant 3 )

2.2.1: Dry roller:
Working mechanism: The dry roller is mainly consisted of the inlet and outlet material box, roller, vane, the rolled rings, the supported idler, the stop idler, the driven device, framework, legs etc. It receives the cold aggregates that the gradient belt feeder delivery, adopts the dry heating method of roller refluent rotation type, delivery the cold aggregates from one end, install the coal (fuel) burner at the other end, then send into the flame and the hot wind, heat the cold aggregate up to the stipulated temperature; There is about 3.5-4 degrees of obliquity in roller, the obliquity can make sure the aggregates are pushed into the feeding outlet. Moreover, there is installed the deferent spiral vanes and the feeding vanes in the roller, so after the aggregates delivered will be heated 3-5 min., they will be scratched into the feeding outlet and then flow into the stone elevator / hot elevator.
Attentions of Installation and debugging:
The debugging of the dry roller is mainly keeping the roller in suspension state; make the catch wheel and the rolling ring in the state of connection and disconnection. Because the idler is the force object, so it is ok that if only guarantee the idler surface inflicts a component force, which can get over the gravity. There out the four idlers should be along with the rolling direction and lean upward at a certain angle, the specified will be decided according to the suspension situation.


2.2: Burning system
For the burner, the user can select the light oil burner or coal burner.

a. Main composing: burner (including the air-blower, oil pump motor), oil pipeline, the bracket of burner etc.
Fuel burner adopts single-slice computer program control, the button or the touch operation, the photoelectric transducer, the temperature storage and other high-tech electric control systems. The only thing you need to do is pressing the “start” key and can start the oil pump, air blower, auto-ignition, the flameout alarm, the auto-control temperature and display, can self-regulate the needed fuel amount according to the temperature of aggregates. In addition, it is matched with the function of manual, when the automatic control system breaks down, can guarantee the normal operation of the burner through the manual system


b. The coal burning device (Optional):
Main composing: Coal-fired hearth, coal pulverizer, fuel ignition system, hearth bracket, coal pipeline etc.
Main function: Offer the needed hot source to the cold aggregates. The advantages: the cost is very low, the maintaining is convenient.
The operating method: Put the diesel tube into the rear of hearth, turn on the diesel pump and add the diesel oil, now ignite the diesel with the manual ignition pole, preheating about 1 minute later, start the coal pulveriser and add the coal, after the flame in being steady (about 3-5 minutes), shut off the diesel oil pump, now just only heat up the cold aggregates in the dry roller with the burning coal.
The characteristics of this four-passage spiral-flow coal burner: The shade is separate: burning stable, difficult to flameout, wide use; Compound spiral-flow: Burning stressed and fully; Air receiver powder: Dregs-proof and protect the bricks; Adjustable flame: Can regulate the length and thickness of the flame and reach the needed flame shape. This kind of burner aims at solving the five big problems of high-efficient, stable burning, low pollution, dregs proof and erosion, and can overcome such the limitations as the unstable burning, the few suitable coal kinds, serious dregs, heavy pollution, easy to be damaged for the brick and so on.
First of all, it can substitute the oil with the coal, can save the fuel expense of mixer, reduce the operating cost greatly.
Second, the special structure and rational layout of the hearth make the coal can burn fully and steadily and without any storing dregs.
Third, for the mutual function of the one-time spiral-flow wind and the adjustable direct-flow wind, not only can burn high-efficiently and stably but also can be suitable for the various coals’ combustion.
Fourth, It is convenient to regulate online: According to the characteristic of various coals and the dry roller, can adjust the length, thickness and strong or weak of the flame at random, the adjustable range is large.
Fifth, Can improve the service life of the brick greatly because of the burning type of air receiver coal;
The requirements of burning:
1) The heat-generating quantity is bigger than 5000 cal / g
2) The volatile component is bigger than 20%
3) The whole moisture is less than 5%
4) The whole Sulphur component is less than 1%
5) Ash content is less than 10%

Operarional guide Asphalt Plant ( 2 )

2 Gradient belt feeder:
Working mechanism: Gradient belt feeder is kind of belt conveyor and consisted of the framework, roller, high wear-resisting rubber canvas conveyor belt, the upper and lower idlers, active(passive) roller and driven motor, its largest feeding capacity is 100t/h. Its function is to send the qualified aggregates to dry roller continuously and evenly. The active and passive rollers are all matched with the serviceable bearing. At the same time, they are also matched with the fastening device and the right wheel, and can adjust the elasticity and lean of the conveyor belt, in addition, there is installed the cleaning device outside the conveyor belt in order to remove the small aggregates on the conveyor belt. When the rubbers of the cleaning device are worn and torn seriously, should change in time for preventing the device from splitting the conveyor belt.

Attentions of Installation and debugging:
The ring belt is easy to run deflective, it is mainly caused by the unparallel force, this kind of force may be caused by the active (passive) roller’s unparallel, maybe also caused by the horn shape because of the lean of the ring belt joint, can adjust and correct it through tightening the fastening pole and correcting the gradient position of the supporting idler.




2.2 Aggregate heating system
This system mainly includes: Dry roller, burning system.
Main function: Heat the cold aggregates up a certain temperature that the finished mixture needs.

Operational Guide for Asphalt Mixing Plant ( 1 )

In order to use and maintain Asphalt Plant correctly, guarantee the normal running of this machine, the manual introduce its performance characteristic, structure, installation, operation, maintenance, etc. The operator and maintenance man should be familiar with its performance and structure, use and maintain correctly according to the regulations of operation instruction to guarantee the normal running of every function parts, prevent the unnecessary trouble from taking place, and thus lengthen its service life as much as possible, give play to its best efficiency.
If you find any lacking during usage, please feed the information back to our company or our local office so that we can improve the products quality constantly, and meet your demands better.
This kind of asphalt mixture mixing equipment is consisted of the following eleven systems: Cold aggregate feeder system (include: Aggregate feeder, Gradient belt conveyor, Dry roller, Burning system, Hot aggregate elevator, Vibration sifter system, Filler elevator, Measuring system (include: Hot aggregate measuring device, Filler measuring device, Asphalt measuring device), Mixer, Mixing plant principal part, Electric control system, Gas flow system, Dust removing system, Bitumen feeder system (Elective)

1. Main performance parameter:

1. The rate of production under the standard conditions: 60-80T/h
2, Rated capacity of the mixer: 1000 kg/batch
3, Bitumen aggregate ratio of mixture: 3%-9%
4. The proportion of filler: 4%-12%
5. The outlet temperature for the finished materials: 130°-160°C
6. Measuring accuracy for aggregate: ± 0.5 % (static state measure); ± 2.5 % (dynamic measure)
7. Measuring accuracy for filler: ± 0.5 % (static state measure); ± 2.5% (dynamic measure)
8. Measuring accuracy for bitumen: ± 0.35 % (static state measure); ± 2.0% (dynamic measure)
9. The stability of the feeding temperature for the finished materials ±6 ℃
10. The discharge density of smoke and dust: ≤ 400mg/Nm3 (water dust- removing)
11. The normal average working time: ≥ 100 h
12. The noise of operating: ≤ 70 dB (A)
13, Service life of the machine: ≥ 7000h
14. The total power of installation: About 187kW (excluding the bitumen heating system and the sack cleaner)

2. Main systems’ composition and use
2.1 Cold aggregate feeder system

Structures: Aggregate feeder, Gradient belt conveyor.

Main functions: Passed the primary matching and then send the qualified aggregates to the dry roller.
2.1.1: Aggregate feeder
Working mechanism: This machine belongs to the fixed type module structure, it is made up of four cold materials storehouses, the belt feeder and the aggregate belt conveyor, etc., and the biggest feeding amount is 100t/h. The outside wall of the front two cold storehouses is installed the store-wall vibrator; this cold storage should be filled with the sand and rice stones. For each belt feeder, its output aggregates are all fasten on the below aggregate belt conveyor. The belt feeder and the aggregate belt conveyor are all matched with the fastening device and the right wheel, and can adjust the elasticity of the conveyor belt and its lean, in addition, there is installed the cleaning device outside the conveyor belt in order to remove the small aggregates on the conveyor belt. When the rubbers of the cleaning device are worn and torn seriously, should change in time for preventing the device from splitting the conveyor belt.
Attentions of Installation and debugging:
The ring belt is easy to run deflective, it is mainly caused by the unparallel force, this kind of force may be caused by the active(passive) roller’s unparallel, also maybe caused by the horn shape because of the lean of the ring belt joint, also maybe caused by the moving direction of the ring belt and the feeding mouth length of the hopper are inconsistent; if belongs to the front both, can adjust and correct it with the fastening pole; if belongs to the later, need to loosen the connection bolts of the four suspenders and readjust their position for making its moving direction is consisted with the length of the feeding mouth.

The structural sketch of the aggregate feeder shows as follows: