Taking fused silica、M45 synthetic mullite and Synthetic cordierite as main raw materials and pure CAC as binder, a kind of large lining bricks for coke oven door with height of 580~1 300mm, width of 430~610mm, thickness of 350~435mm, and unit weight of 250~420kg is developed in the process of vibration cast molding, curing, drying, baking and high temperature sintering. This kind of brick has better performance in all aspects than the currently prevailing sintered mullite-cordierite lining bricks by mechanical pressing, which has been proved by applying it in 7.63m and 6m coke oven batteries.

Laser flash method is widely studied and applied in the aspect of determination of coefficient of thermal conductivity of materials． The thermal conductivity of silicon carbide material bonded with silicon nitride is determined with laser flash method，the factors that have influence on accuracy are analyzed and the corresponding measures are put forward．

This paper discusses the key quality control points for lime production based on the production process of Maerz kiln. In order to produce high lime, the impurities in the raw material and fuel should be controlled. Meanwhile, limestone particle size, sintering temperature, pressure and sintering time should be suitably controlled.

This paper introduces the flameless combustion technology and its study status． A simulation analysis is made on the air flow and heat transfer in combustor of annular lime kiln． Comparing the combustion states before and after modification of the combustor in annular lime kiln，the theoretical basis for realizing flameless combustion in the combustor is concluded．

The sulfur content in active lime is calculated and analyzed. The effect of sulfur content in active lime on steelmaking is studied. It is pointed out that attention of several basic conditions should be paid in the process of desulphurization reaction in steelmaking.

The induction furnace dipping experimental method is used to simulate the  application condition on site． The phase composition，weight loss features under high temperatures and microstructure of carbon containing refractories after corroded by molten steel are investigated by means of analytical methods，such as XRD，SEM，TGA etc. The results show that in the stage of heating in the range from 20~1 300℃ the weight of MgO-C sample has been reduced all through, the total weight reduction is 1.142 7mg，occupying 16.93％ of its total mass，while the weight loss of Al2O3-MgO-C sample is less，the total weight loss is 0.441 4mg，occupying 6．45％ of its total mass. When heating temperatures range from 1 070~1 170℃, Al2O3-MgO-C sample has increased weight in small amount. The corrosion mechanisms of molten steel on MgO-C and Al2O3-MgO-C refractories are nearly same． Molten steel penetrates into the grain boundaries of major phases，generating many small holes at the boundaries and leaving intergranular and intragranular iron precipitation.