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为了推广锰矿直接还原技术在转炉内的使用,对转炉终点条件下锰矿的热分解、熔融还原和渣钢间平衡状态进行了分析。利用热力学分析方法讨论了国内外转炉锰矿直接合金化锰的平衡状态。结果表明,在转炉终点时刻,锰矿以MnO形式存在于渣中;锰在渣钢间的平衡主要以铁、锰竞争氧化的形式存在;理论计算锰分配比和实践生产数据有相同的趋势,且计算值大于实践生产数据;高温、高碱度、高w([C])、低w((TFe))可以降低锰分配比;渣量越小,锰收得率越高。此外,讨论了进一步提高转炉锰收得率的控制工艺。
In order to promote the use of direct reduction of manganese ore in the converter, the thermal decomposition, melting reduction and the balance between slag and slag in the converter were analyzed. The thermodynamic analysis method was used to discuss the equilibrium state of direct alloying manganese in converter manganese ore at home and abroad. The results show that manganese ore is present in the slag as MnO at the end of the converter. The balance of manganese in the slag steel is mainly in the form of competitive oxidation of iron and manganese. The calculated manganese distribution ratio has the same trend with the actual production data The calculated value is larger than the actual production data. The high temperature, high alkalinity, high w ([C]) and low w (TFe) can reduce the manganese distribution ratio; the smaller the slag amount, the higher the manganese yield. In addition, the control process to further improve the manganese recovery rate of the converter was discussed.