Repair roller surface must be cleaned up in order to start surfacing

Roll press after a period of operation, the roll surface there will be wear, and lead to the roller surface due to the material is extruded in the middle of the roll surface and therefore the wear of the roller surface middle be faster than the rollers on both sides, concave, the middle of the roll gap becomes larger, impact extrusion effect. Therefore need to grasp the roller surface time to repair, repair the roll surface must be cleaned up in order to start surfacing. When the roll surface off the block, repair welding of such pits must be in strict accordance with the process to lead to the roll surface due to a mixture of the compound of iron and other hard objects, if the depth of the pit of the transition layer, it must first pit cleanup clean, followed with ZD2 wire welding transition layer, wire welding with ZD3 wear layer and use ZD3 10 wire welding pattern layer, not at liberty to which material surfacing. The hazards of the mixture of the compound of iron on the roller surface is very large, so to try to install more iron removal device pulley on the material is not too thick to prevent iron buried inside can not be sucked out. The closed-loop system with a V-separator, at least once a week to the powder machine, under the hopper as well as enhance the material in the machine all the beating mills, iron enters the system, it would have been in the system loop until squeeze it to the required size will go out, it is bound to cause serious damage to the roller surface.