纯净锰铁生产工艺方案的实验研究

EXPERIMENTAL STUDY OF THE CRAFT PROJECT OF CLEAN FERROMANGANESE

介绍了用精整锰硅粉生产低磷中碳锰铁的实验。采用“二次预炼”工艺方案,进行了对锰硅合金熔体先增硅脱磷、脱碳,然后对低磷MnSi合金熔体“二步法”脱硅的实验研究。结果表明,采用脱磷合金和CaO-CaF2系造渣剂,可以实现MnSi合金还原脱磷,脱磷率约为40％;MnSi合金中硅含量控制在21％左右,可以使合金中碳含量降至1.40％以下,该中间合金可满足生产低碳、低硫中碳锰铁产品的质量要求。

This experimentation is to produce low phosphorus medium carbon ferromanganese with resettled silicon-manganese powder. The method of 'pre-fining two times' is adopted,which is to dispose of phosphorus and carbon from silicon-manganese at first,then to dispose of silicon from low phosphorus MnSi alloy melts by 'two steps method'. The results show that deoxidizing dephosphorization of MnSi alloy can come to reality, the dephosphorization degree is about 40%, if the content of silicon in MnSi alloy is controlled at about 21%,the content of carbon in the alloy will be under 1.40%. This medium alloy can satisfy the quality requirement of producing low phosphorus low sulfur medium ferromanganese production.