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1.Introduction of double roller crusher

      Double roller crusher is mainly used for the crushing of medium or lower-hardness mines and rocks with medium or lower rigidity in mine selection, chemicals, cement and building materials industrial production.A roll crusher crushes using compression, with two rolls rotating about a shaft, towards the gap between the rolls. The gap between the rolls is set to the size of product desired, with the realization that the largest feed particle can only be 4 times the gap dimension. The particles are drawn into the gap between the rolls by their rotating motion and a friction angle formed between the rolls and the particle, called the nip angle. The two rolls force the particle between their rotating surface into the ever smaller gap area, and it fractures from the compressive forces presented by the rotating rolls. 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, reducing the ROM coal. 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.)  

2.Features of double roller crusher

(1) The structure is simple and compact, the noise is low, and the efficiency is high.

(2) The installation is flexible, basically needs no foundation.

(3) The rollers' surface adopts anti-friction welding rod or exchangeable dental plate, and the maintenance is simple.

(4) Self-preservation ability is strong, and high hardness materials (such as all sorts of metal block) won't break the equipment's parts when they enter the crushing cavity.

(5) The discharging granularity is adjustable; the minimum can reach 2-10 mm.

3.Application of double roller crusher

(1) Widely applied to fine crushing of building materials, metallurgy, chemical industry, coal etc.

(2) Especially applied to the fineness of the clinker and adjusting the grinding mill grading, in addition, it can increase the productivity by 30-50%.

4.Parameters of double roller crusher