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1958年11月,河北石家庄市钢铁厂,在小高爐上采用东焦红矿冶炼,該矿特点:含铁低,会SiO_2高,因而耗用石灰石数量在50％以上,这样就造成产量低,生铁含硫高(由过去的0.3％以下增加到0.3％左右)。針对着这种情况,该厂于去年11月至今年2月中旬采用生石灰代替石灰石作熔剂进行試驗。試驗証明,产量可以提高30％左右,生铁含硫大大降低。一、試驗經过 (一) 根据石灰石在爐內燃烧的过程,其化学反应为:CaCO_3→CaO+CO↑
November 1958, Shijiazhuang City, Hebei Iron and Steel Plant, in the small blast furnace with the East coke red ore smelting, the mine features: low iron, high SiO_2, which consumes more than 50% limestone, resulting in low yields, Sulfur high pig iron (from the past 0.3% to 0.3% or so). In response to this situation, the plant from November last year to mid-February this year using lime instead of limestone as a flux test. Test proved that the output can be increased by about 30%, greatly reducing the sulfur content of pig iron. First, the test after (a) according to the limestone in the furnace combustion process, the chemical reaction is: CaCO_3 → CaO + CO ↑