Through applying ladle argon-blowing technology by two gas supply bricks,the ladle bottom blowing rate is increased,the dead band of ladle argon bottom blowing is reduced,the composition and temperature of the molten steel are made more uniformity,and then the inclusions in steel and the composition segregation are dererased.

Optimization of spinel content of porous pocket block by orthogonal experiments;

Study on law of flow velocity distribution and flow resistance in slot plug;

Measurement of Drag Coefficient in Slot Plug for Gas Stirring;

Mathematical and physical modelling of slot plug application in 300 t ladle

Measurement and analysis of resistance coefficient of permeable brick;

2 Steelmaking Plant of WISCO,80 t ladle has been lined with single permeable bricks.

It introduces process control point of chrome corundum permeable brick and its application in smelting ferroalloys.

By optimizing smelting-technology,controlling the component of slag effectively, optimizing air supply model of bottom blown and improving the the technology of slag splashing ,the problem of bottom rising and air brick corrosion have been solved, the effect of bottom blown has been increased, the quality of molten steel has been improved.

Using pure magnesium desulfuration comes up some problems,such as slag is lack and watery,slag-off is difficult,using air brick help slag-off of molten iron tank is developed,material and installation site of air brick are selected and optimized in the practice,application of air brick is introduced in the paper.

Numerical simulation of argon blowing behaviors of molten steel with purging plug in ladle bottom;

Purging plug is one of the key parts in the technology of UHP electric arc furnace(EAF) bottom blowing.

First according to the structure of purging plugs,the limit gas flow is obtained through theoretical calculation or practical test,the minimum gas flow is 45 Nm~3/h and the maximum gas flow is 200 Nm~3/h.