The activation energy of magnetite materials of pellet which were pretreated with and without high pressure grinding is studied using Arrhennius Law in this paper.

The high boron wear resistant cast steel was developed to produce grinding rollers and grinding collars of Raymond mill because of high manganese steel of lower work-hardening effect,poor abrasive-wear resistance and short service life used in the factory.

To insure steady running of the equipment and to reduce the production cost, the plant carried out study on producing liner of grinding roller and base, mainly include: analyse and test physical and chemical performance of the liner material, choose suitable material, confirm the produce process,and et al.

Parallelism adjusting for grinding rolls of roller mill;

Smidth Company designed ATOX vertical roller mill in the milldle of 20 century.

For the rolls of a roller mill there are contradictions among their hardness, wear resistance and machining properties to which considerations are hard to be given comprehensively.

This paper analyses the structure and modeling conditions of the domestic roll grinding and fluting machines, offers suggestions on how to further improve the equipment, and provides a theoretical basis for future development.

Analysis of grinding roll modification of Mitsubishi coal pulverizer type MVM25R;

The new material for medium speed grinding roll-MnMo compound high chromium cast iron has been developed successfully.

Automatic control of open arc surfacing system for the milling roller;

By scanning the milling roller-teeth surface coated with the uniform Ni-Cr alloy permeation layer through the high energy plasma arc at ordinary pressure, the multicomponent permeation and quenching harden were carried out.