Rolling Machine

The rolling machine, also known as extrusion mill and roller mill, is a new type of cement energy-saving grinding equipment. It has a high-efficiency, low-efficiency ball mill pre-grinding system and reduces steel consumption and noise.
  • Roller Press

    Pengfei Roller Press is the latest generation of grinding equipment developed by Jiangsu Pengfei Group Co., Ltd. It greatly reduces the energy consumption and noise of the pre-grinding system. It is suitable for the construction of new mills and the technical transformation of old mills, so as to increase the output of the ball mill system by 30-70%.

  • Application of Roller Press in Slag Final Grinding System

    Slag Roller machine Flow: Material is dispersed and dried immediately after entering V-type flour separator. The host deals with the slag that has lost its viscosity. Fine slag powder has been dried. It is directly fed into high-efficiency dynamic flour separator by long pipeline, where the slag powder is sorted and finally dried. The heat source of slag drying is provided by coal-fired hot blast stove. The wet slag can be dispersed and dried in V-type separator, long pipeline, and high-efficiency dynamic separator to meet the moisture requirement of drying.

    The practice has proved that the slag particle size of roller machine and vertical grinding process is the same, and the slag particle size of ball grinding process is the smallest, that is, the fine particle content of ball grinding slag powder is high (< 30 microns), and the coarse particle content is low. The distribution of slag powder particles in a ball mill is wider than that in a roller machine and vertical mill, and there is little difference between a roller machine and vertical mill.

    Roller machine and vertical mill are widely used power-saving equipment in a grinding system in recent ten years. The vertical mill has been widely used in slag final grinding, while roller machine is mostly used in the combined grinding system. The practice has proved that the roller mill used in final grinding of slag can be comparable to vertical grinding, with comparable power-saving effect, lower investment, better market prospects, and popularization value.
  • Possible Problems in Roller Machine System Operation

    It is always the case that the operator controls the stable flow position of the roll press feeding at about 80% of the warehouse weight according to the specifications. When the warehouse is found to have a downward trend, the feeding quantity will be increased immediately, but it is often too late, and the small warehouse will be emptied in tens of seconds. Similarly, when the warehouse is found to have an upward trend, it is too late to stabilize the warehouse by reducing the given pressure and increasing the opening of the inclined insert plate. The small warehouse will burst in a very short time, so the roller machine can only run in an empty warehouse for a long time. The material is directly impacted by the extrusion roll by the feeding belt. The gap and current fluctuate greatly. The vibration of the roller machine is very large, which causes a series of equipment damage and affects the work. Extrusion roll bearings have serious exfoliation of outer ring roller track, unstable feedback pressure of extrusion roll, frequent damage of accumulator bacterial valve assembly, breakage of universal joint, frequent breakage of frame bolts of roller machine, frequent breakage of the torsion support rod and a series of abnormal equipment damage during normal service life. The current of the driving motor fluctuates in a wide range of 22-55A so that the continuous cake cannot be formed, which makes the output of the cement mill extremely unstable.

    After a systematic analysis of the process and equipment, the following problems are initially identified: 

    1) Serious segregation of materials in the weighing bin results in the out-synchronization of the speed of material passing along the axis of the extrusion roll; 
    2) There is no stable and continuous warehouse pressure in the weighing bin, which can not meet the supersaturated operation conditions of the roller machine; 
    3) The automatic feed adjusting device self-contained by the roller machine has design defects and cannot adjust the opening of the inclined insertion board to control the feeding amount at any time. 
    4) The extrusion roll hydraulic correction program has not reached the optimization matching with the actual operating environment.

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  • Dagong Industry Park, Hai`an City, Jiangsu Province, China
    Dagong Industry Park, Hai`an City, Jiangsu Province, China
  • jspfgroup@163.com
  • +86 0731-84457778
    +86 0731-84457778