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武钢第二炼钢厂冶炼取向硅钢采用日本进口刚玉质弥散型供气砖底吹,寿命约6次;其它钢种采用西德引进的上插式喷枪顶吹,寿命约4次,均不能适应炼钢发展的需要。为改善钢包底吹氩的技术经济指标,1986年以来,开始了不同材质不同结构的钢包底吹氩供气砖的试验研究。其中,刚玉质定向多孔型供气砖在第二炼钢厂试验,供气砖孔径≤1mm,孔数140个,Al_2O_3≥90％,体积密度>2.5g/mm~3,气孔率≤25％,荷重软化温度≥1430℃;底吹氩工作压力0.2～0.4MPa;
Second steelmaking plant in Wuhan Iron and Steel smelting oriented silicon steel using Japanese imports of corundum diffusion-type air supply brick at the end of life, life expectancy of about 6 times; other steel using West Germany introduced plug-type spray gun top life of about 4 times, can not adapt Steelmaking needs. In order to improve the technical and economic indexes of argon blowing at the bottom of ladle, experimental research on ladle blowing argon gas supply brick with different materials and different structures has been started since 1986. Among them, corundum oriented porous gas supply brick in the second steel mill test, supply brick diameter ≤ 1mm, hole number 140, Al_2O_3 ≥ 90%, bulk density> 2.5g / mm ~ 3, porosity ≤ 25% , The load softening temperature ≥ 1430 ℃; working pressure at the bottom of argon blowing 0.2 ~ 0.4MPa;