The semidry process gunning mix which is suitable for the hot gunning of the coking chamber wall of coke oven is developed by taking calcined kaolinite, hard fireclay chamotte, SiO2 micropowder etc.as main raw material and selecting different kinds of binders and additives. The semidry gunning mix for coke oven hot repair is characterized by less water addition, low rebound rate and long gunning mix“hangingup” time, and its quality is up to and exceeds the quality of the same kind of foreign products.

The importance of the gap between the loosening sleeve type rolling ring and barrel backing plate, the methods for the theoretical value calculation and gap measurement are described. Through the analysis of the actually measured standardizing data of rotary kiln on site, the reliability of calculation and measuring methods are proved, and at the same time, the gap adjustment method is presented.

The problems often found in the production process of magnesia prefabricated parts are discussed and corresponding solving methods areput forward. These methods have a certain reference value for the production of magnesia prefabricated parts.

Environmental protection and energy saving light weight mullite thermal insulating brick is developed by taking fireclay and kyanite as raw materials and single pure sawdust as pure forming agent.Through the measurements of the bulk density, thermal coefficient and so on of the brick, it is showed that under the appropriate process conditions, the light weight thermal insulating brick with the density of 0.57g•cm-3 and 0.16W•（m•K）-1 thermal coefficient at 400℃ can be made and has the advantages of low cost, energy saving and environmental protection.

Application of coal-fired lime rotary kiln exhausted gas in pulverized coal preparation system medium for pulverized coal in the pulverized coal preparation system. Thus, it can not only make full use of waste heat in rotary kiln exhausted gas, save energy and reduce consumption, but also greatly improve the safety of coal preparation system because of low oxygen content in rotary kiln exhausted gas.

A high strength corundum silicon carbide castable is developed by using brown corundum and silicon carbide as major starting materials and calcium aluminate cement as binder. Through optimizing grain composition and adjusting the adding amounts of cement and composite micropowder, the cold and high temperature strengths of sample which is affected by various factors are determined. The result shows that the developed corundum silicon carbide castable not only had a higher stength at normal temperature, but also possesses a very high hot strength.