the double roll crusher is designed to be used for the coarse and medium reduction of various kinds of coal and coke as well as other brittle materials of low hardness.

Product Introduction
Double roll crusher belongs to a fine crusher that follows primary or secondary crusher and is used for secondary or tertiary reduction. It is similar to hammer crusher that can crush materials with compressive strength ≤160MPa. The feed size of double roll crusher is medium, and the output size is adjustable. It has the characteristics of low maintenance cost, low moisture requirement, reliable performance, low power consumption, low dust and low noise.

Double roll crusher

Double roll crusher is used for the crushing or medium-hard rock as well as for sticky and soft materials, i.e. iron ore, quartz stone, rock gold, rock tantalum niobium ore, rock tin ore, rock tungsten ore, manganese ore, ilmenite ore, potash albite, limestone, river pebble, copper ore, bauxite Ore, barite, basalt, etc.

Types of Double Roll Crushers

1. Toothed Roller: The surface is serrated, it can be made according to customer requirements. Generally dry broken, because if it is wet crushing, the material after broken is not easy to transport.

Toothed Roller Type Roller Crusher

2. Round Roller: smooth surface without teeth, it’s the common type of double roll crusher.

smooth roller crusher

Double roll crusher is mainly composed of 2 rollers, driving, pressing & adjusting devices and roller support bearings. One roller is fixed and the other is adjustable. The gaps between the two rollers decide the discharge particle size. The minimum discharge particle size can reach 0-1 mm or 0-2 mm.

Double roll crusher structure


Double roll crusher models

Working Principle
The double roll crusher is working, while the material is fed into to machine, the machine uses the frictional force of the roller surface to bite the material into the crushing area. Then the material can be crushed by crushing or splitting. It is simple to say a roll crusher using compression to crush, 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 that you need, with the realization that the largest feed particle can only be 4 times of the gap dimension. And when used for coarse crushing or the crushing ratio needs to be increased, teeth or grooves are often made on the roller surface to increase the splitting effect.

Double roll crusher pricinple

There is a wedge or shim adjusting device is installed between the two rollers. The top of the wedge device is equipped with an adjusting bolt. When the adjusting bolt pulls the wedge up, the wedge pushes the movable roller away from the fixed wheel, that is the gap between the two rollers. The larger the size, the larger the discharging granularity. When the wedge is downward, the gap between the two wheels of the movable roller under the action of the compression spring becomes smaller, and the discharging granularity becomes smaller. The shim device adjusts the discharge particle size by increasing or decreasing the number or thickness of the shim. When the shim is increased, the gap between the two rollers becomes larger. And when the shim is reduced, the gap between the two rollers becomes smaller and the output particle size becomes smaller .

Advantages and Features
Inside equipped with a dust excluding plate, good sealing, avoid the splash of fine material, less dust, low operating noise.
Simple & compact structure, light weight, small size, small footprint, convenient operation and maintenance.
Inside equipped with an anti-dust plate, which has good sealing performance, avoiding the splashing of small materials after crushing, less dust, low working noise, and greatly improved working environment.
Re-optimize the design of the grinding roller of the roller crusher, the equipment does not need to change the roller body for life
Good flexibility and operational reliability
High efficiency and low energy consumption.
The grinding roller of the counter-roller crusher is equipped with replaceable wear-resistant liners, which are made of foreign advanced wear-resistant materials. It has the advantages of long service life, not easy to damage, and convenient maintenance. The continuous service life can reach more than one year. When the wear is serious, the cover can be replaced. So the maintenance is easy and the cost is low.
The machine is equipped with a safety protection device. When an accidental metal iron piece enters the crushing cavity, the protection device will act and the iron piece leakage equipment will operate normally.
The roller gap of the abrasive roller body of the roller crusher can be adjusted between 1mm and 20mm. After adjusting the gap according to the requirements of the crushing particle size, the crushing particle size can be reliably controlled.