subject: Dust Reduction Keeps Roll Crushers Work Well [print this page] Roll crusher is mainly used for the crushing of medium or lower-hardness mines and rocks in mine selection, chemicals, cement and building materials industrial production.
Some major advantages of roll crushers are they give a very fine product size distribution and they produce very little dust or fines. Rolls crushers are effectively used in minerals crushing where the ores are not too abrasive and they are also used in smaller scale production mining of more abrasive metal ores, such as gold. Coal is probably the largest user of roll crushers, currently, though. Coal plants will use roll crushers, either single roll or double roll, as primary crushers.
Usually, these crushers will have teeth or raised forms on the face of the roll. Roll crushers used for minerals and metal ores have smooth faced rolls.
This series of crusher is used for crushing of ores and rocks, the advantages are: reliable structure, high efficiency, easy-to-adjust and economical. The safety spring system is the overload protection device, which makes foreign material goes through the machine without bringing any hurt to it. The sealing modes are oil and water, which segregate the stone powder and lubricating system. The crushing chamber is decided by the purpose of ore, the standard model is suitable for medium crushing; the medium model is suitable for fine crushing and the short head model is suitable for fine crushing.
Unique roll crusher structure
First of all, driving system works like this: two motors drive rollers through triangle belt transmission. The two rolls force the ore particles between their rotating surface into the ever smaller gap area, and it fractures from the compressive forces presented by the rotating rolls.
Secondly, the granularity out of the equipment can be adjusted. The particles are drawn into the gap between the rolls by their rotating motion, a wedge block formed between the rolls and the particle, called adjusting device. Adjustment bolts are fixed on the top of wedge block. When bolts pull wedge block up, the wedge block push moving roll away from fixed roll, the gap become bigger, and the discharging granularity become bigger and vice versa.
Finally, the transmission part should be installed safety cover by actual requirements for safety. Dust is a problem continually affects the production efficiency of roll crusher in daily use or maintenance process, now we are analyzing this question with Hongxing expert together.
1) In order to reduce dust caused by air leakage, we often water the entrance when the material is dry in the actual production which intensify the filter bag burnt and feeder blockage.
2) Air goes into a closed dust hood with material when the material on belt conveyor are falling, the dusty gas will proliferate though cover wall cracks and orifices, which causes environment pollution. In addition, due to the belt-corner dust points are set incorrectly, the precipitator makes no effect on the lower belt conveyor, however its opening or stopping. Therefore, the dust collector never works when the crusher is running, and the dust in lower belt conveyor is always diffusing.
3) When the dust enters into the dust collector pipe, the bend at the inlet increases system resistance and the bend parts are susceptible to be worn and blocked by dust.
4) After being rained or watered, broken material will be of high moisture, the dust particles are thicker than that of dry materials, the bag filter are easy to be burnt and the feeder is easy to plug, which result in bag filter ventilation resistance substantially increased, ventilation capacity decreased and dust aggravated.
