The author launched the study on the mediumsmall pulverizer's traditional electrical control technical reconstruction,designed the core of the single chip microcomputer to attain intelligent control,improving the automatic level of the pulverizer group.

Maintenance and protection of roller mill;

Set feeding trajectory and infeeding speed as multiple target functions and take horizontal distance and vertical distance between feeding roller and fast roller, rotational speed and diameter of feeding roller and inclined angle between the fast roller and slow roller as design parameters, Particle Swarm algorithms and MATLAB were used in the optimization design of roller mill.

Detailed analysis is made for the feeding non-uniformity phenomena frequently occurred in the feeding system of a break roller mill, and specific settlement methods for them are set forth.

It analyses the working operation of the high-speed grinding machine and the influence of the parameters.

With the adoption of pulverization principle of shearing,DG series of double-refiner discs grinding machines were developed.

With the adoption of pulverization principle of shearing, DG-350 double-refiner disc special type grinding machine is developed to satisfy the requirements of special powder preparation.

Effect of mechanical grinding on particle size distribution and strength of coal gangue-cement system;

To study the effect of mechanical grinding on particle size distribution and strength of coal gangue-cement system different mechanical grinding schemes were adopted including: coal gangue ground independently to replace cement, coal gangue and cement mixed first then ground and coal gangue and cement ground independently then mixed ( the ratio between coal gangue and cement keeps 30 to 70).

The researches on rollermill' s power,grinding force and roll pressure;

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.

Several methods for extending the service life of tooth-wedge belts are discussed in the light of the application of such belts in the driving systems of rollermills, their design, manufacturing, routine adjustment and maintenance.