This paper introduced the investigation of the major repair of a large sintering plant and the sample analysis to discuss the cause of lining damage.The conclusions are as follows: the sintered mixture contacts with the furnace lining at high temperature and sticks to the furnace wall and forms hanging slag; the slag gets into the refractory lining through pores and cracks,the main component of iron oxide gradually diffuses and reacts with the refractories,which result in deterioration,erosion until cracking and falling off.

By XRD and SEM analysis on hercynites from different manufactures and hercynites from different batches of the same manufacture,as well as the ceylonite bricks produced with the above materials,it is found that a lot of β-Al2O3 and impurity phases exist in materials when hercynite fuses insufficiently,and they violently react with magnesia leading to cracking of the ceylonite brick influenced by external factors fluctuate,and the fully fused hercynite has a relative strong adaptability for firing.

This paper introduces the crystal structure,properties,chemical composition and mineral composition of dolomite,and its physical and chemical changes of in sintering as well as the production process of high quality dead burned high-calcium magnesite.

To meet the client’s requirements and maintain stable production,this paper introduces the modification of production process and production layout of the existing kilns,which is based on the calcination process condition of domestic gas combustion kiln.Using qualified light-burnt dolomite powder in calcination not only reduces the production cost,but also avoids suspend of gas combustion kiln.

Comparing with traditional drawing method，the new method draws line-style masonry figure of the ladle bottom with function of filling in custom patterns,which shortening the design time and increasing work efficiency and correct rate.

This paper analyzes the effects of unsintered and over sintered lime on energy consumption of calcium carbide industry,and demonstrates the comparative studies with living examples. The application of rotary active lime technology in calcium carbide industry can not only reduce the consumption of calcium carbide production,but also economize on energy source and improve the resources utilization efficiency by using the tail gas of calcium carbide furnace and semi-coke fly ash,which are produced in calcium carbide production process.

In the lime production process of vertical preheater—rotary kiln—vertical cooler,the preheater is an important equipment of rotary kiln production line and the preheating effectiveness is particularly important to the output and quality of the production line.Currently, there are two kinds of preheaters in the market,one is stepped preheating chamber preheater,the other is compartment preheater.This paper analyzes the structures,preheating principles and preheating effectiveness of both preheaters.

An automation renovation of production process was done in lime shaft kiln.The renovation improved the production process and increased the efficiency by downsizing staff and achieved the purposes of energy saving and green production.