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北京特殊钢厂化铁炉所用焦炭含灰分高达30～40%,强度很低,给化铁炉生产带来很大困难,熔化率低,风眼经常被堵塞,铁水温度不高,给转炉吹炼造成很大困难,以致影响到铁合金用量增加,低温报废很多,钢质量不高。为提高钢质量,根据苏联经验,在化铁炉内可以用无烟煤代替焦炭使用。我们也曾用热制无烟煤先后进行过六次试验。从试验所取得数据来看,用热制无烟煤全部或部分代替焦炭可以改善炉内熔化情况,提高铁水温度和熔化率,成本也可以大大
Beijing Special Steel Furnace used in iron furnace coke ash content of up to 30 ~ 40%, low intensity, to bring great difficulty to the production of iron furnace, melting rate is low, the eye is often blocked, hot metal temperature is not high, to the converter blowing Refining into a very difficult, resulting in an increase in the amount of ferroalloy, a lot of low temperature scrap, the quality of steel is not high. In order to improve the quality of steel, based on Soviet experience, anthracite can be used instead of coke in the iron furnace. We have also conducted six tests with hot anthracite. From the experimental data obtained from the point of view, with all or part of the thermal anthracite instead of coke can improve the furnace melting situation, improve the molten iron temperature and melting rate, the cost can be greatly