Investigation on Coal-Oxygen Scrap Melting Process

Investigation on the coal-oxygen scrap melting process shows that using internal-combustion coal-oxygen burner to melt scrap is feasible. Among four types of coal-oxygen furnaces-oxygen burner melting furnace is better than other types on the quotas of process. The metal yield is 95%～97%, the melt down carbon and sulphur contents are >1.0% and <0.080% respectively for this melting furnace. The coal-oxygen scrap melting process would have a significant effect on the technological transformation of EAF and BOF in China.

煤氧熔化废钢的试验研究

煤氧熔化废钢的热态试验表明，煤氧枪熔化废钢的试验工艺是可行的。四种工艺中，采用坚炉、炉壁侧煤氧枪加二次燃烧的d型工艺的技术指标最好。此类工艺的开发具有较大现实意义。

煤氧竖炉熔化废钢的试验研究

煤氧竖炉熔化废钢的热态试验研究表明：采用煤氧竖炉熔化废钢在工艺上是可行的。通过考察焦炭加入量、二次燃烧给氧量、氧煤比对金属收得率、废钢熔化时间、熔清碳、二次燃烧率等指标的影响，得到煤氧竖炉熔化工艺最佳的工艺参数。在此工艺参数范围内，熔清碳＝１．０％～２．０％；金属收得率＝９４％～９５％；熔化时间＜３８ｍｉｎ；熔清硫＜０．０７０％；热效率为２６％～２９％。煤氧竖炉熔化废钢工艺的开发对我国电炉和转炉工艺的改造具有一定意义。