Reason of the Crusher Dispose Dust Improperly

The crusher dust seriously affect the production capacity of the crusher (crusher) and the health of workers, facing the large amount of dust  crusher produced, our technicians provide professional crusher dust problems for our crusher customers , I hope it is helpful to you.

What problems the crusher dust improper dispose will cause ? The following is detail explanation:
◆(Crusher)the general baghouse filter area of crusher is small, ventilation is generally inadequate , dust cover and crusher cavity are difficult to form a slightly negative pressure, therefore, the dust of the working environment is large,  which is not conducive to breathing.
◆ Precipitator dust enter into the pipeline, the system resistance is increased at the elbow of the inlet tube , the bend parts are susceptible to  be wearied and clogged by the dust. If we adopt the screw conveyor and sub-grid transport wheel baghouse to collect dust ,the power consumption will increase, mechanical maintenance workload will increase too; we often  need to demolish the under sub-grid wheel feeder, if this situation lasts a long time, the under feeder flange will leak air ,it will exacerbate the ash bucket air leakage.
◆ When crushing materials humidity is high (after raining or the materials be caught in a shower) ,the dust particles be sent into the precipitator is larger than the dry crushing materials, the bag-type dust collector is easy to be pasted,  the under feeder is easy to be jammed,  this will bring about the significant increase of the bag-type dust collector ventilation resistance , and the ventilation capacity is decreased, of course the dust problem will be more serious .
◆ In the process of the materials fall from the belt conveyor, the air and the material went together into the closed dust cover, the dusty air spread to the outside of the cap through the crevice and orifice hood walls ,which pollute  the environment. In addition, due to incorrectly set of the belt-corner dust point , open and stop of the precipitator is almost no impact to head dust of the lower belt conveyor . Therefore, since the 5th rock crushing machine was put into use , this dust collector almost does not work, the upper belt conveyor has been in the diffuse dust.
◆ The failures of baghouse and supporting parts are more, which not only affect the normal dust disposition, but also increase the equipment maintenance workload.from the view of equipment maintenance statistics ,the  spare parts' poor quality are important reason of equipment failure .
In order to reduce the dust caused by the crusher housing air leakage , in the actual production, people often water the materials at the mouth of crushing ,  its result is intensify the baghouse filter bags paste and  the under feeder blockage. Because  people often  conduct intermittent clean to the baghouse , when the precipitator works normally , the division round air leakage is  a question that should not to be neglected.

Design Knowledge of Crusher Hammer and Disc

Although hammer crusher is a mature mining crushing equipment, for its design, we must not sloppy. The following is the knowledge introduction to the design and calculation of crusher's hammer and disc:
◆ The hammerhead design and calculation of hammer crusher
Its design mainly refers to the structural design. As the hammer head shape, quality, materials are very influential to the crusher production capacity, Especially the shape to the quality distribution, full use of the materials. As to the more detailed discussion on the hammerhead structure design and related improvements ,you can see it in the topic. In short, hammer is the main working parts. Its Shape, structure design have far-reaching economy effects to their work ability , the production capacity of the entire machine.  Hammerhead shape is generally divided into light, medium and heavy these three types. This model of hammer crusher refers to the medium-sized hammer design,and related calculations.
The hammer crusher can also use the high manganese steel as its design materials . Hammerhead material selection problem is a very critical issue to improve its abrasion resistance. The choice of material depends on the working conditions and requirements of the working parts. Because the  crusher always crush the limestone these medium hardness materials. People usually use high carbon steel to forge or cast. adopt high manganese low alloy steel, some is coated with appearance Carbide. Some high chromium cast iron, its wear resistance is several times greater than the high manganese steel hammer . As to the choice of materials: you can see the part of topic-improve wear resistance hammerhead specialized exposition.we don't described in detail here, In short, hammerhead choice of materials is not only related to the working life of the hammer bit, the production capacity of the machine, production efficiency, and is also related to various aspects of economy.

◆ Disc structural design and calculation of the hammer crusher
Each pin requires 8 hammers. If the disc is used suspension hammerhead,then it requires a total of nine discs,this depends on the design requirements. Two discs on the sides, the common feature is that one side is equipped with the locking nut, the other end is positioned by the shaft shoulder. The used nut is GB-812-85 , so that each disc is evenly distributed six round hole,we can use 6 pin shaft to suspend hammerhead,  The size of the disc depends on the diameter of the rotor, the size of the diameter of the rotor is the basis of the disc design size. Therefore,we can know the rotor diameter is 800mm according to its model, the disc size value is in a certain range. the circular hole size is approximately equal to the hammer hole size.

Operation Precautions of Jaw Crusher

Jaw crusher should be installed above the concrete foundation,and plus  skids or rubber to reduce vibration when working.
Jaw crusher's (jaw crusher) operation: the correct operation of the crusher  is one of the important factors that guarantee the crusher works properly, improper operation or negligence in the operation are often caused equipment and personal accidents. Correct operation is to  follow the rules strictly.
The preparatory work Before starting : careful examination before starting the crusher, the check contents are: crusher tooth plate wear situation, adjust ore discharging mouth size, whether the ore crushing cavity having ore; if large block ores exist, we must remove them,; whether the connection screws loose; whether the pulley  Flywheel protection cover is intact; whether the tightness of the triangle belt and trolley spring are suitable ;whether the lubrication system is intact; whether the electrical equipment and signal system are normal or not.

Handling Precautions of jaw crusher (jaw crusher):
1, After starting, if the crusher makes unusual beat, we should stop automatically turn, and restart after identifying and eliminating the ills .
2. When starting, Crusher must no-load , when the automatically turn is normal, we can start the ore-discharging equipment , the ore be fed into should be gradually increased until the load is full.
3. Ore discharging Should be uniform , ores are not allowed to be packed with the crushing chamber; the  maximum  mine size allowed should not be larger than 0.85 times of the ore discharging mouth size; while feeding ore, we should ban the anti-mine iron and other non-HSBC crushed materials into the crusher; once we found these non-broken materials go through the port of discharge, we should immediately notify the belt transporter in time to prevent serious equipment accidents of the next crusher , such as the impact crusher and hammer crusher.
In the operation process, we often have to pay attention to the situation of lump ores stuck to the mine mouth, sometimes use an iron hook flip or application-specific tools when operating, but not by hand to avoid an accident. During operation ,if the ore feeding are too many to choke the crushing chamber, do not stop the crusher ,but should stop ore-feeding, we should start the ore feeding machine after dealing with the ores in the crushing cavity. during working, the operator should conduct check regularly, according to to see, hear, touch and other methods to observe the various components situations of the crusher position and bearing temperature, the bearing temperature must not exceed 60 ° C, we should not immediately stop when the bearing temperature is too high, instead,we should take plus large amount of oil, forced ventilation, water-cooled these methods to reduce the temperature.

Crusher Technical Advantages Analysis

◇ Impact crusher (impact crusher) can effectively handle the material having a large amount of moisture, which can prevent crusher clogging.
When dealing with the materials having excessive moisture, impact crusher's feed chute and counterattack board can be equipped with a heating device to prevent the adhesion of the material. Impact crusher is not required to be equipped with the bottom screen ,it can effectively prevent clogging. Hammer crusher can not prevent the bonding of materials by heating, and shall be equipped with the bottom screen, this increase the possibility of clogging.
◇ Impact crusher is applicable to both soft materials and hardness materials.
The plate hammer is firmly fixed on the rotor by the mechanical clamping structure , when it moves with the rotor rotates,a great moment of inertia is produced . Comparing to the hammer crusher (hammer was hanging), impact crusher rotor has greater momentum, and suitable for crushing harder materials, at the same time, the energy consumption  is lower.
◇ Convenient and flexible adjustment to the crusher discharge size, wide range of adjustment.
Impact Crusher can adjust the particle size through a variety of ways, such as regulate the rotor speed, adjust the counter plate and the grinding chamber gap. The gap adjustment can be adjusted by mechanical or hydraulic type, hydraulic adjustment system can easily complete the adjustment of the gap through local operating button or fortune control system. While the hammer crusher regulating discharge size can only be achieved by replacing the bottom screen(comparing to the impact crusher，but not cone crusher).
◇ Impact crusher (impact crusher) wearing parts wear rate is smaller than hammer crusher, the metal utilization is higher .
Impact crusher board hammer wear area only appears on the looking materials side. When the rotor speed is normal, feed plate hammer will fall on the surface ( attack area), the plate hammer back and sides are not to be worn. Even the looking material side wear very little. And the bottom of the grinding rod is also very easy to replace.the metal utilization rate of impact crusher board hammer can be as high as 45% -48%. While the hammer of the hammer crusher was hanging, wear and tear occurs in the upper, front, rear and side, comparing to the plate hammer, hammer wear more serious, hammer metal utilization is only about 25%. And the rotor body itself may also be subject to wear. Hammer crusher wear seriously affected, and the replace work of sieve is also more complicated.
◇ Impact crusher spare parts are easy to replace, and the maintenance costs is reduced.
Crusher rotor is only installed six plate hammer, using the HAZEMAG company provided special tools ,we can easily replace the board hammer,  replace a board hammer just need one shift time. The bottom of the grinding chamber grinding rod replacement requires only ten minutes ,which can greatly reduce the time and cost of repair and maintenance.

Components Installation of the Two-stage Mill

As we all know, mining crusher refers to the crushing machinery whose content is more than 50% of the total content, the row compound particle size is greater than three millimeters. It is invented by British Hengan. according to the feeding and nesting size, the crushing operations are often divided into coarse crushing, medium crushing and crushing. The commonly used equipments are impact crusher, compound crusher, single stage hammer crusher, vertical crusher, gyratory crusher, roll crusher machines, double roll crusher, combo crusher, and so on. the crusher is widely used in mining, metallurgy, building materials, road, railway, water conservancy and chemical industry and many other sectors. Common crushing machines are winnowing mill, hammer crusher, impact crusher, roll crusher, compound crusher. Jaw crusher, having large crushing ratio, uniform particle size, simple structure, reliable operation, easy maintenance, operating costs and economic characteristics. PF-I series impact crusher can process materials side length is 100 to 500 mm, the compressive strength is up to 350 MPa, great crushing ratio.
Now, let us introduce the knowledge of two-stage crushing equipment installation:

The two-stage grinder (double stage crusher) host equipment installation :
1) two-stage grinder equipments can be installed together with the motor  on a concrete foundation or rack, the ground should be smooth, when installing ,the machine must be level.
2)The machine should be installed feeding device to ensure uniform feeding, and avoid clogging.
3) motor wiring should be strictly in accordance with the direction of  the rotor wiring rotation.
4)In order to ensure the safe operation of the gangue grinder, we must install the ammeter to control feeding,and ensure the normal load.

Installation of the two-stage grinder unit (double stage crusher):
1) each equipment should be connected firmly with each other,the pipe joints strives to be tight to prevent gas leakage, if the pipe joints leak, it will not only generate dust pollution, but also decline the production capacity and product quality.
2) electrical control cabinet should be installed at the place where is easy to operate, easy to observe the location of the equipment, various equipments' electrical connection lines  and control lines should be arranged and placed in alignment tube according to the relevant provisions of the state .
3) electrical control cabinet should be fitted with the drive button, stop button of equipment, work lights, grinder ammeter, feeding motor , grading motor speed control knob and various protective devices.
4) all two-stage shredder equipments must be installed in accordance with the relevant provisions.