The operation procedures of small asphalt mixing plant

1 preparation:

(1) Heating asphalt pump half an hour in advance, heating asphalt pool two hours in advance.

(2) Manually running the parts of asphalt plant.

(3) Check whether all valves are in working status, manually take oil, preheating asphalt pipeline and measuring tank until the normal work.

2 Powers:

(1) Heating asphalt pump, this can be closed after half an hour.

(2) Stir to open.

(3) Open the air compressor.

(4) Start dusting motor.

(5) Igniter.

(6) High-pressure diesel pump.

(7) Observe whether the ignition is successful, three unsuccessful must stop to check..

(8) Start blower motor.

(9) Start the main pump.

(10) The drying drum should be opened by manual operation.

3 The production process:

(1) Drum drying.

(2) Elevate ore hopper.

(3) Drop by ore hopper.

(4) Waiting for three minutes (wet material for three minutes, dry material about one minute) to be good material drying.

(5) On the screen, click taking asphalt, spraying asphalt, taking powder, add powder. Stir for two minutes.

(6) The finished hopper down to the finished product tank.

(7) Elevate the finished product hopper; open the storage silos to discharge.

(8) Elevate ore hopper.

4 Shutdowns:

(1) Shut down the main oil pump and high-pressure diesel pump.

(2) Close other moving parts, keep drying drum, draft fan, drum fan to run.

(3) Cleaning asphalt pump, piping and asphalt measuring tank.

(4) Waiting for furnace and roller cooling, turn off all motors.

(5) Disconnect the power.

What is the difference between LB Series and DHB Series Asphalt/bitumen Plant?

1. Mixing system:

LB series is batch mixing type, using forcing mixer to mix, mixing asphalt is much more equably than DHB series.

DHB series is continuous mixing type, using drum mixer to mix.

2. Weighing system:

LB series with accurate weighing system for aggregate and bitumen and filler…, so asphalt quality is much higher.

DHB series with rough weighing way.

3. Vibrating screen:

LB series vibrating screen to make sure the aggregate size accuracy.

DHB series without screen.

4. Design:

LB series design is perfect, and with higher quality.

DHB series design is simple, and with lower cost.

5. Capacity:

LB series: 40t/h-400t/h.

DHB series: 20t/h-100t/h.

6. Asphalt quality:

LB series is higher, is applied to high way and normal road normally.

DHB series: is applied to normal road normally.

LB series asphalt batch mixing equipment

DHB series asphalt drum mix plants

The problem cases of baghouse dust collector of asphalt equipment in use

when The baghouse dust collector of asphalt mixing plant ran about 1000 hours, the smoking that the pipe of baghouse dust collector emitted is not only a high-speed stream, but also with a large number of ashes, and the operator found the bag is very serious blockage, A lot of holes on bag already, some sand holes on the pulse spray blowpipe. Dust bag change frequently. By the technical exchange and communication of technical personnel and Japanese experts, draw the conclusion: when baghouse dust collector leaving the factory, its dust collector box is out shape due to the defects of production process. Porous plate of deformation can't perpendicular to the air, which caused the tilt Angle. so the root reason of broken bag is that tilt Angle and some sand holes. Once the bag is damaged, the heat flow with the soot particle will directly through the dust bag - flue pipe - chimney - the atmosphere. If it is not a thorough overhaul, it not only can make the enterprise into the equipment maintenance cost and production costs greatly strengthen, reducing the production efficiency and quality, serious ecological environment pollution, causing a vicious cycle.

asphalt batching plant from 40tph to 400tph

Quality Control:
Highly skilled and educated employees manufacture products in a modern facility, which incorporates C.A.D. (Computer Aided Design), C.A.M. (Computer Aided Manufacturing) and C.N.C. (Computer Numeric Controlled) manufacturing techniques. Quality management system follow ISO9001/ISO14001, and our products are with CE and GOST certificate.
Product Scope:
Batch mix asphalt plant(from LB500 40th to LB4000 400tph);
drum mix asphalt plant(DHB);
mobile asphalt plant(MDHB\SLB\QLB);
concrete mixing plant;
stabilized soil mixing plant;
and other road construction equipment.

You can see operation video from here: http://www.youtube.com/watch?v=IbPrLaOBIjY, Welcome your enquiry!
Main Parameter of asphalt plant from 40tph to 400tph

Model	Capacity (Standard Conditions)	Mixer Capacity	Dust Remove Effect	Total Power	Fuel Consumption		Measurement Accuracy
					Fuel Oil	Fuel Coal
LB500	40t/h	500 kg	≤20 mg/Nm3	147kW	5.5-7?kg/t	10kg/t	Aggregate:?±0.5% Filler:?±0.5% Bitumen:?±0.25%
LB800	64t/h	800 kg	≤20 mg/Nm3	199kW	5.5-7?kg/t	10kg/t
LB1000	80t/h	1000 kg	≤20 mg/Nm3	285kW	5.5-7?kg/t	10kg/t
LB1200	100t/h	1200 kg	≤20 mg/Nm3	316kW	5.5-7?kg/t	10kg/t
LB1500	120t/h	1500 kg	≤20 mg/Nm3	380kW	5.5-7?kg/t	10kg/t
LB2000	160t/h	2000 kg	≤20 mg/Nm3	470kW	5.5-7?kg/t	10kg/t
LB2500	200t/h	2500 kg	≤20 mg/Nm3	547kW	5.5-7?kg/t	10kg/t
LB3000	240t/h	3000 kg	≤20 mg/Nm3	700kW	5.5-7?kg/t	10kg/t
LB4000	300t/h	4000 kg	≤20 mg/Nm3	870kW	5.5-7?kg/t	10kg/t
LB5000	400t/h	5000 kg	≤20 mg/Nm3	960kW	5.5-7?kg/t	10kg/t

Main Structure of asphalt plant from 40tph to 400tph

		1.Cold Aggregate Supply System Bin volume and number is customizable, Separated structure design significantly reduces dimensions for shipping and ensures a high capacity. Two independent cold feeders and modular design, transport expediently. Seamless ring belt, high reliability and long life. Frequency convertor controlled SIEMENS motor, infinite variable speed adjustment, more accurate and energy saving.
		2.Drying Drum SIEMENS motors, hard-teeth reduction gear, friction driving, drum rotating stably. Optimized lift blade design, make sure heating equably and high energy using ratio. With 50mm insulating layer and stainless steel skin, avoid heat be lost.
		3.Burner Italy EBICO oil burner imported with original packing, high burning efficiency, diesel, diesel/heavy oil dual purpose or gas as fuel is optional. With automatic flame failure protection devices for emergency.
		4.Dust Collection System Two level dust collection system (volute casing collector + bag house collector), with high and low temperature protection device for the system security. Bag house collector using USA Dupont NEMEX bags, heat resisting and long life.
		5.Mixing Tower Both aggregate and filler elevators are equipped with a double ring chain bucket, which is more reliable and convenient for maintenance. Twin shaft compulsory asphalt concrete mixer (the mixing arm is cross arranged with changeable gridded mixing blade), high mixing efficiency and long life. SIEMENS motors with hard-teeth reduction gear, most stably and high performance. Bitumen is sprayed into mixer through a special designed spray bar with high pressure to reduce feeding time and increase mixing uniformity. Totally enclosed type circular vibration screen, modular design, vibration motor driving, low maintenance and long life. Double layer much bigger hot aggregate storage hopper can effectively guarantee the continuity of the supply of hot aggregate; with 50mm insulating layer to avoid heat be lost.
		6.Bitumen Supply System Volume and number of bitumen tanks is customizable according to user requirement. Heat transfer oil heating type, heating equably.
		7.Filler Supply System The standard stacked filler silo design is more convenient for connection with main tower and requires less space for installation. Volume and number of filler silos is customizable.
		8.Control System Automatic/manual control system, with fault self-diagnosis process, operate easily and safely. SIEMENS PLC electrical control system, reliability is high. Fully graphic Multilanguage control interface is easy and convenient for different operators.

A common fault analysis of asphalt mixing plant - Filler Supply System

1. Material level is not normal

Diagnosis:

check the level meter output is normal or not;

check whether mineral powder played too hard, causing material level meter does not work properly.

Exclude:

output is not normal, the indicator to repair or replace the indicator;
if mineral powder played too tight, Filler Supply System should be cleaned, until normal.

2. Measuring nowadays powder is slow
Diagnosis:

check whether the butterfly valve switch is normal;
check whether the rotating feeder blade is stained with mineral powder;
Check whether the mineral powder is bulging in the tank.
Exclude:

Butterfly valve opening is not normal, to adjust its opening to the normal condition;
Rotary feeder with powder: ornamental butterfly valve, open the cover plate of screw machine ,open feeder, with a hammer knock the enclosure of feeder, until the feeder blade clean.
Mineral powder is bulging: first pressure breaker arch, if the result is bad, then with a hammer knock powder cans, and then if the result is bad, open of the powder tank entrance, broken arch by manual shovel powder.

A common fault analysis of asphalt mixing plant - the fault and solution of the dust collector

1. Dust leakage

Open the upper cover plate of baghouse dust collector, and check for cloth bag, take corresponding measures according to condition. Cleaning dust on the top of upper chamber, check if there is dust into the bag.

2. The problem of bag

a. the temperature of dust gas is too high

The temperature of dust gas must not exceed the maximum allowable temperature. The cloth bag can generally be under 200℃ high temperature, if the inlet temperature more than this value, the damper should be opened for the introduction of cold air cooling.

b. the humidity is too large

The bag is blocked if the climate is wet, so the wet cloth bag should be dried or replaces a new bag.

c. dust accumulation

If the dust accumulates at the bottom of the bag in the dust collector, the bag will accelerate wear. At this time, you shall check the running status of dust discharging device and check for leaks, and take corresponding measures.

d. bag wear

The inside of bag is dirty, because the dust is into the bag, which also caused the wear. In addition, if the dust is accumulated in the powder outlet, in order to prevent bag damage, the powder feeding device of the dust collector should be checked and the dust bag should be replaced.

A common fault analysis of asphalt mixing plant - Cold aggregate supply system fault diagnosis and solution

Fault	Cause	solution
The bottom of the belt is damaged.	The environment temper is too high.	Take measures to cool
	Belt tension is insufficient to skid.	Adjust the belt tension
Premature belt breakage	Foreign matter into the bottom of belt.	Adjust the sweeper to ensure effective cleaning
	The pressure of sweeper is too large.	Adjust the sweeper balance beam position.
	The insufficient belt tension made idling.	Adjust the belt tension.
Belt wear	The roller entrained sediment	Regular inspection and cleaning
	Serious non-parallel rollers.	Adjust the parallelism
	Belt tension is insufficient	The tension of belt can be adjusted.
belt slippage	Belt tension is insufficient	Adjust the belt tension
	Belt with oil	Thoroughly clean
Belt to harden	Generate heat due to belt slippage	Adjust the belt tension
	Ambient temperature is too high	Take measures to cool
Belt quiver	The belt is too long	Install the roller in the two axis
	Improper belt tension	Properly adjust the belt tension

How to use asphalt mixing plant for saving energy

Asphalt mixing equipment is usually open-air operated and the aggregate is also piled up in the ground, Affected by rain, whose water content can be increased. So, fuel consumption is increased due to the increasing water content in the aggregate. It is the most effective way to reduce the water content of aggregate for saving energy. It has a good effect, as building good drainage, setting up the canopy, etc. The latest patent proposed: the wasteheat form asphalt mixing equipment produced can be available to preheat cold aggregate, which is a very good suggestion.

Classification Of Asphalt Mixing Plant

1. Press the production capacity can be divided into: small, medium and large.

The productivity of small is under 40t / h.

The productivity of medium is the 40 ~ 240t / h.

The productivity of large is in more than 240t / h.

2. Press the handling methods (migration methods) can be divided into: mobile, trailer and stationary.

Mobile is suitable for the oil and low-level county highway projects. The bin and the stirring pot with tires can vary form a place to place on the basis of the construction site.

Trailer may be usually used for road construction. The devices are on some trailers and assembled at the construction site.

Stationary is also called asphalt processing factory. The operation site of the devices is stationary. It is suitable for the urban road construction that is focus.

3. Press process methods (mixing methods) can be divided into: continuous asphalt drum mix plant and asphalt batch mix plant.

Continuous asphalt drum mix plant: the heating and drying of aggregate and the stirring of mixture are mandatory performed periodically. Aggregate is stirred by separation.

Asphalt batch mix plant, a pot and a pot. The time of stirring a pot of aggregate is 45 seconds to 60 seconds. its output is determined according to the model.

The technique and method of making modified asphalt

The production of modified asphalt can use a blending method, can also adopt secondary blending method. The mixing method and the mixed method are suitable for a blending method; the precursor method is suitable for secondary blending method.

(1) The mixing method

a. the way applies to a variety of modified asphalt by mixing technique;

b. the way is that the modifier is added to hot asphalt, by mechanical mixing strongly, is mixed with asphalt at high temperature to make the modified asphalt having a desired content of the modifier. The finished products can be use in the production of modified asphalt mixture.

c. with making modified asphalt by the way, the mixing time, asphalt mixing time, temperature, and stirring speed should be determined by test.

(2) The mixed method

a. it should adopt the high shear device or colloid mill;

b. Modified asphalt mixing time, temperature, and other parameters should be based on the different asphalt, modifier and equipment capacity to set,

c. the modified asphalt should be used with the production at the construction site, when break time storage, should be transferred to storage with continuously mixing or pump cycle. During storage the modified asphalt can not reduce the effect.

(3) The precursor method

a. the way applies to a variety of modified asphalt matrix by mixing technique;

b. the content of  modifier should be appropriate in the modified asphalt matrix, should be ensured according to the technical requirements, past experience and equipment status.

c. according to the content of the modified of the modified asphalt matrix, the modified should be made to the modified asphalt having a desired content of the modifier.

d. modified asphalt matrix and modified asphalt should be uniform mixing, and blending temperature should be appropriate. The modified asphalt should be producted when needed. when break time storage, should be transferred to storage with continuously mixing or pump cycle.

LB1500 Asphalt Plant Installed Successfully at Algeria

On July 24th and 25th, 2012, after Mr. AH from E.E.M Company of Algeria visited our asphalt plant factory, he confirmed the order of one set LB1500 120TPH asphalt plant.
In March, we sent engineers to help the installation of LB1500 asphalt batching plant for E.E.M Company of Algeria. On May 21st our engineers returned to China after the installation work completed.
During almost 40 days, our engineers guided and helped to install every parts of the asphalt mixing station, and trained the operators after finishing the whole installation work. Our clients were very satisfied with our plant and service, and more happily when seeing the good quality asphalt after production. Seeing the satisfying smiles of clients, we felt happily too.

Click here to view the video:

Operation of LB1500 bitumen Batch Mixing equipment of Algeria

bitumen mixing equipment lifting loading shipment

asphalt batch mix equipment is packed into the container

 

Asphalt mixing plant heat conduction oil system installation details

Asphalt station installation completed after debugging in production

  

Bag Dust Collector is the best dust collector system of Asphalt Mixing Plant

bag dust collector of asphalt mixing plant

During mixing asphalt mixture, asphalt mixing plant will produce a lot of gas, dust and combustion residues, with particle size of above 0.5 μm. If directly discharged, these dusts will cause serious pollution to the surrounding environment, and also affect nearby residents and crops, etc. Therefore, to meet the emissions standards, the smoke and dust must be collected by the dust collector system.

The early dust collector system can only remove large particles (> 5μm), dust removal rate is only 75% -85% generally. With the improvement of environmental requirements and dust removal technology, asphalt mixing plant has been reached emissions requirements by using secondary dedusting. And the methods of secondary dedusting include wet dust and bag dust collector.

The wet dust collector is relatively simple in structure, low cost, having spray-type, venturi-type and other types, and can achieve a certain dust collection effect. But it will lead to secondary pollution problem, because waste water will gradually be acidified by the flue gas of sulfur, nitrogen, etc, during the recycling waste water. The acidified water may have a corrosive effect on steel, will form a secondary environment contaminated if discharged arbitrarily, and so wet dust has been diminishing in asphalt mixing plant.

LB series asphalt mixing plant

Collection efficiency of bag dust collector is higher, up to 99% or more, and can reach more than 99.99% for the dust above 0.5μm particle size; bag dust collector have a wide range of applications, can be used for different types of asphalt mixing plant, and the Airflow can be changed; it is adaptable, flexible, operating flexibility. Different functional bag can be suitable for different types of fuel such as diesel, heavy oil, gas and coal. When gas dust concentrations is larger in the entrance, the collection efficiency is little effected; compared with wet dust collect system, bag dust collector can be recycling of dust graded according to the thickness, and so it does not exist the problem of the sludge disposal and secondary pollution; compared with other collection system, bag dust collector has no complex ancillary equipment and technical requirements, which cost of building and cost of operation is low, and life long.

Therefore, the bag dust collector is the most commonly used, and also is best dust collector system of Asphalt Mixing Plant.

Content Source:
http://www.chinaasphaltplants.com/knowledge/66-Bag-Dust-Collector-is-the-best-dust-collector-system-of-Asphalt-Mixing-Plant.html

National standard warm mix asphalt concrete (draft) through review

May 9, 2013, the National Standardization Technical Committee hosted a review meeting of warm mix asphalt concrete (commonly abbreviated as WMA) (draft) in Kunming, Yunnan Province of China. Evaluation experts, drafting group members, a total of more than 20 people attended the meeting. Review Committee examined the draft WMA chapter by chapter, debated item by item in detail, and proposed the specific amendments. Evaluation experts agreed that the standard of WMA generally reached the international advanced level, agreed to adopt the review. According to the comments and Suggestions of the Review Conference, the drafting group was required in the meeting to further revise and improve the draft WMA as soon as possible, for the reporting approval.
National standard WMA filled a void of asphalt concrete industry in our country, laying the foundation and basis for the widely using of warm mix asphalt concrete in our country, and played a positive role for the development of low carbon environmental protection economy.
news source:
http://www.chinaasphaltplants.com/News/64-National-standard-warm-mix-asphalt-concrete-(draft)-through-review.html