石钢—高炉于1964年下半年以来,持续冶炼低硅炼钢生铁,到去年九月份为止,硅含量可控制在0.6%以下,硫0.024%,渣碱度1.08%左右。截止今年三月份又较长时间稳定在0.3～0.4%的硅含量,硫0.024,渣碱度1.05左右下炉况操作正常。根据石钢的经验,生铁含硅量降低0.1%,碱性转炉炉龄可延长40～50炉,金属料消耗降低1公斤/吨钢,熔剂消耗降低9公斤/吨钢。降低生铁中硅含量,对炼铁的经济指标也有改善,如 Since the second half of 1964, Shihwa-blast furnace has continuously smelted low-silicon steelmaking pig iron. Until September last year, silicon content can be controlled below 0.6%, sulfur 0.024% and slag basicity 1.08%. As of March this year, a long time stabilized at 0.3 ~ 0.4% of the silicon content, sulfur 0.024, slag basicity about 1.05 furnace operating normally. According to the experience of Shi Steel, the silicon content of pig iron is reduced by 0.1%, the age of alkaline converter can be extended by 40 ~ 50 furnaces, the consumption of metal materials can be reduced by 1 kg / ton of steel and the flux consumption can be reduced by 9 kg / ton of steel. Reduce the silicon content in pig iron, the economic indicators of ironmaking also improved, such as