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为了满足无渣或最少渣量炼钢与顶、底吹复合冶炼的需要,高炉冶炼低硅生铁有新进展,生铁含硅量越来越低(由0.3～0.6%降至0.1～0.2%)。与此同时,高级钢(含硫量0.005%左右与低磷)比例增多,国外进行铁水预处理(脱硅、脱磷、脱硫),国内也在开始进行铁水炉外预处理。本文仅介绍国内、外高炉冶炼低硅生铁进展情况。近几年来,国内重点企业高炉炼钢生铁含硅量有所降低。1978年8月重点企业高炉铁水含硅量为0.76%,1982年1月0.62%,
In order to meet the need of slag-free or slag-less steelmaking and top and bottom blowing smelting, there is a new progress in blast furnace smelting of low-silicon pig iron. The content of silicon in pig iron is getting lower and lower (from 0.3-0.6% to 0.1-0.2%), . At the same time, the proportion of high-grade steel (about 0.005% sulfur content and low-phosphorus content) increased, foreign hot metal pretreatment (desiliconization, dephosphorization, desulfurization), the domestic is also starting the hot metal outside the pretreatment. This article only describes the domestic and foreign blast furnace smelting low-silicon pig iron progress. In recent years, the domestic key enterprises blast furnace steel pig iron reduced the amount of silicon. In August 1978, the key enterprises’ blast furnace hot metal content of silicon was 0.76%, 0.62% in January 1982,