Roller crushers are used mainly for crushing easily fractured materials such as soft limestone, chalk, and clay ...
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Roller crushers are used mainly for crushing easily fractured materials such as soft limestone, chalk, and clay to between 1/3 and 1/5 of its original size.
Double roll crushers are used for both, primary and secondary crushing. They guarantee a strictly defined final grain size with a minimum of fine grains.
Raw materials, secondary materials and by-products such as coke, sinter, coal, soft to medium-hard rock, ore, chalk, broken glass and similar products.
The motor drives the fixed roller and movable roller to work via reducer and coupling. Materials are put into the space between the two rollers via the feed entrance. As the two rollers inward turning, the input materials are crushed, pressed, ground, and at last come out from the base of the machine.
The crushing rolls consist of the roller bodies, complemented with crushing rings or crushing shells. The rolls are secured either with anchor bolts and end disks, or bolted with screws. In order to facilitate maintenance, the crushing roll shafts are arranged in heavy-duty cast steel housings with lubricated, amply dimensioned spherical roller bearings. Materials used are of highly wear-resistant specially cast alloys in order to achieve long lifetimes of parts.
When the crusher has been running for some months or some years, the raw materials may become harder to crush or a higher output may be needed. The MHC Twin shaft breaker can then be adjusted in several ways.
The size of the drive pulleys may be altered to achieve a higher throughput or a higher torque.
Minor adjustments of the output size can be made by altering the synchronization of the two rotors.
The Twin shaft breaker has four bearings that are continuously lubricated by a grease pump placed in a cabinet. The excess grease in the bearings is discharged inside the machine and ends up in the crushed product. The barrel contains grease for several months and the system is monitored by sensors that trigger an alarm if a malfunction occurs or the grease barrel is empty.
The condition of the wear parts (toothed discs in rotors and cleaning teeth) is easily monitored by taking a glance inside the breaker. The breaker is moved into maintenance position by lowering the wheels at the corners.
Tools and lifting yoke are supplied together with the breaker to facilitate quick and trouble-free maintenance, including replacement of wear parts.
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