In view of the bricking furnace door of coke oven’s defects such as short life，difficult to repair，easy to dissipating heat and often product glutinous，the article analyzed the cause of destroying，advance a new theory about improving the structure of lining，developing the new materials and using a new method by whole pouring.Combine the method with smearing materials on the lining,the new method guarded against damage of the lining，let the life of the furnace door have more than tripled,reduced the loss of heat and cut down the worker’s work load.Achieve the aim of safe production，energy conservation and long life.

In this paper，the raw matericals obtained from the recycled ladle porous bricks are used to prepare the aluminum magnesia castables at ladle bottom，which partly replace the high-aluminum aggregates.The test results show that the castables can meet the requirements of testing standards and utilizations and have better performances than brown corundum aggregate products，with some significant econmic benefits and social benefits.

This paper introduces the technical superiority，common faults and countermeasures of Maerz lime kiln to realize its application and development in metallurgical industry，and introduces several technical innovations for Maerz kiln.

The paper briefly introduces the problem of short life of lance for 600t·d^-1 Maerz kiln in raw material factory of Lingsteel.It also analyzes the causes and puts forward some technical measures to prolong the lance life.

The company decided to replace mix coal with briquette coal as calcined fuel for lime kiln to solve the problems of big loss，high heat consumption，poor permeability and low production and achieved good results.

This paper describes the high alumina brick made of high quality bauxite and mullite compound as major raw materials,with kyanite,andalusite,sillimanite and pyrophyllite as expanding agents,with soft clay as bonding agent,and with certain amount of additives,then calcined under appropriate temperature，which has been sucessfully used for ladle lining to produce low carbon steel and strainless steel.Tiny brick expension appears at the high temperature and allows a good integrity of the ladle lining for a better erosion resistance.

The rotary kiln lining can be used brick masonry,also can choose the other refractories.But in recent years,with the improvement of the construction methods and refractory materials research and development of the breakthrough,rotary kiln lining started using overall kiln technology,through the rotary kiln lining material selection and construction technology combining the method of the rotary kiln to improve productivity and reduce heat loss,to achieve the high efficiency of energy saving and consumption reduction effect significantly.