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在复合吹炼中,炉底供气砖是技术关键。钢铁研究总院和唐钢研制的采用镁碳质缝隙式和毛细管式供气砖作为炉底供气元件,并在唐钢第二炼钢厂30吨转炉上进行了七个炉役共2811炉复吹试验,共冶炼了普碳钢、低合金钢103534吨,获得圆满成功。该供气砖的体积密度为2.87～2.88克/厘米~3,显气孔率6.3～6.6％,耐压强度450～700公斤/厘米~2,透气量可控制在0～55标准立方米/小时范围。使用寿命基本上与转炉炉
In the compound blowing, bottom gas supply brick is the key technology. Steel Research Institute and Tangshan Iron and Steel developed the use of carbonaceous gap capillary and capillary gas supply as the bottom gas supply components, and in the second steel plant in Tangshan Iron and Steel 30 tons converter furnace carried out a total of seven furnaces a total of 2811 furnace Fu blowing test, a total of smelting of plain carbon steel, low alloy steel 103,534 tons, a complete success. The bulk density of the air supply brick is 2.87-2.88 g / cm3, the apparent porosity is 6.3-6.6%, the compressive strength is 450-700 kg / cm2, the air permeability can be controlled at 0-55 standard cubic meters per hour range. The service life is basically with the converter furnace