To increase yield and performance indicators and decrease product energy consumption,the key parts and equipment in production of silica bricks which can easily effect product performances and yield were studied.Furthermore,with reference to domestic and international advanced technologies,the raw materical iron\|removal process and automatic added system for additives and mineralizers were developed and a best technical program was determined for the production of high quality silica bricks to optimize product quality and minimize the energy consumption.

The production process of iron magnesium dolomite is simple.Iron magnesium dolomite has two high-melting-points solid phases—solid solution periclase（MgOss）and free clacium oxide（fCaO）,so it has the characteristics of MgO-CaO refractories.With excellent comprehensive performance,the iron magnesium dolomite syntheticsand has high durability in application of dry play material，gun-mix refractory,coating and insulation castable refractory furnace charge.

To explore the usability of vanadium iron smelting furnace slag for refractory alumina,this paper introduces a physical chemistry experiment with an unbroken alumina slag cake.The result shows that the major constituents of the alumina slag are Al2O3,MgO and CaO，and the major compositions are spinel and calcium aluminate；its refractoriness is over 1 790 ℃，the bulk density is higher than 3.0g·cm-3，the water absorption is 3.0%.Alumina slag can be uesd to replace high alumina cement for its hydraulicity.Its particle strength is similar with flint,so it can be used as refractory aggregate.In conclusion，the alumina slag can be used for refractory material.

To solve the problems of production process in Maerz kiln of Liusteel，the major technologies such as reversible belt at crown,connection mode of spraygun tube,suspension cylinder castables and spraygun materical were improved.After that,the down time of equipments in the kiln is greatly shortened and the production is significantly increased.

BASK of Xing steel was put into operation in Februry 2005，and overhauled in June 2008.The first kiln was used for 3.42 years.Compared with the first，the second kiln has been significantly improved and lasted for 5.41 years till December 2013.The paper analyzed the production process of the second BASK and proposed several control measures for prolonging furnace life as a reference for future BASK production.

During the process of lime calcination in rotary kiln，lime quality and output depend on the ratio of coal powder and raw matericals，as well as the equipment selection and assembly，which directly affect the company’s econmic benefit.This paper analyzes how to maximize the output and lime quality of rotary kiln by stablizing thermal regulation，reasonably adjusting coal-air ratio under the existing equipment conditions without major modification or replacement.

This paper introduces the digestion mechanism,digestion process of calcium hydroxide and its technical characteristics,and analyzes the quality indexes of calcium hydroxide.The result shows that the calcium hydroxide produced by dry process has advantages of high quality indexes,good production environment and simple process and so on.

This article mainly introduced the importance of silica brick crater and iron plaque in silica brick inspection, and then analyze the cause of formation of some of the silica brick melt holes in the process of production,such as iron hole,calcium hole，so preventive measures should be taken.