High strength wear-resistant clinker brick is made of hard chamotte， sanitary pottery waste， sintering agent and modifiers as raw materials. The clinker brick is characterized by high compression strength， proper wear resistance and long service life. Coke wharf is bulit with high quality new clinker bricks， which are widely used in coke plants and enjoying great popularity.

When the tapping hole is being opened， tapping time should be maximized for the most stable operation of blast furnace. Furthermore， low consumption of clay gun， the reduction of labor intensity and environmental protection can be achievable. For longer tapping time， the damage rate of clay-gun-made tapping passage should be reduced. By analyzing the cause of damage， this paper proposes the methods for prolonging the tapping time in several aspects， in terms of upgrading the corrosion resistance and wearability of clay gun as well as improving the furnace operation mode.

This paper studies the process of active lime calcined with rotary kiln based on the production experience and experiment results, and analyses the effects of calcination temperature, holding time, combustion-supporting air volume and rotation speed of kiln proper etc. on the activity of lime. In addition, some viewpoints about the production process of superior quality active lime calcined with rotary kiln are proposed in this paper.

In the paper， the production principle and process of silicon carbide-mullite bricks are described. An introduction is given to the physical and chemical properties of silicon carbide-mullite bricks and its application result in cement rotary kiln. Its developing future is prospected.

In combination with production practice， the analysis is carried out for the cause of the agglomerated ball formation on the lining of the shaft kiln. The prevention measures， judgment method and handling method for the formation of agglomerated ball are described in this paper.

Active lime can loses reactivity gradually after absorbing water and carbon dioxide in air. Under different storage and transport conditions, the calcium oxide content and reactivity of active lime change unceasingly in different storage times. Through test and analysis, it investigates the change regularity and provides the basis for application of active lime.

The CO2 of soft burnt dolomite discharged from A shaft of the kiln varies greatly. Polling inspector has found that the temperatures of the thermal insulation covering plates of No.18 and No.20 lances exceed 150℃. After analysis, the lances at the covering boards are burnt out and there is very high possibility that protection covers of lances are burnt out too. In order to determine the damage degree of the lances the operation of the kiln is stopped to carry out inspection of covering plates and it is found that No.2 and No.3 lances are broken by burning and the corresponding protection covers are burnt out. Aiming at the problems the safer and more reliable solutions are provided.