Through the research on working condition and failure analysis of gear rollers and comb boards of large sintering-crushing machines,a sort of high chromium cast iron wear-resistant alloy was developed independently.

NC Processing of CTC Rolls of Broken Black Tea Machine and Statistical Research for Their Pitch Error;

By means of the χ 2 test and modeling, the pitch errors of CTC rolls have been statistically studied, and on the basis authors quantitatively analyze the rolls machining precision.

There exist air leakage phenomena in the original tooth roll labyrinth seal of pellet shaft furnace The new type of disk seal is used to substitute the labyrinth seal and the lubricating system are reformed and the strict operation and maintenance system are established Therefore, the air leakage problem of tooth roll can be dealt wit

As a core spare part of the pellet shaft furnace, the tooth roll has been widely used in most iron-making plant, yet its structure and cooling problem are the key factor effecting working life.

The grinding efficiency of smooth roll and centrifugal impactor was researched through the milling test of eight_roller mill at same flow rate and different roll gap for C1A and C2A during processing.

The height parameters of the micro salience profile on the roughened surface of smooth rolls were discussed, and the surface roughness of the smooth rolls of rollermills MDDL100 and MDDK100, the newly applied products from Bühler, were tested, with an approach to the relationship between the values R a and Rz of the dull surfaces of the smooth rolls.

The historical conception “the surface of a smooth roll is rough and not glossy” was introduced.