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在0．10m3试验高炉内进行了含碳球团还原的热态试验，冶炼出12％Si、45％Mn的硅锰铁合金.作者在理论分析的基础上，讨论了Si-Mn耦合反应，研究了金属熔体中的脱硫能力实验表明：（1）温度是影响Si、Mn还原的关键，炉渣碱度应控制在1．2－1．4范围内；（2）S随[Si]、[Mn]的增加逐渐下降，可以较易将[S]控制在0．02％以下，最低的硫含量为0．0024％；（3）[P]的大小主要取决于原料带入的磷含量，约为0．30％，并且波动不大．
In a 0.10m3 test blast furnace, a thermal test of reduction of carbon-containing pellets was carried out to produce Si-Mn ferroalloy with 12% Si and 45% Mn. On the basis of theoretical analysis, the authors discussed the Si-Mn coupling reaction, The desulfurization ability of the metal melt shows that: (1) the temperature is the key factor that affects the reduction of Si and Mn, and the basicity of the slag should be controlled within the range of 1.2-1.4; (2) S follows [Si], [ Mn] is gradually decreased, it is easier to control [S] below 0.02% and the minimum sulfur content is 0.0024%; (3) The size of [P] mainly depends on the phosphorus content of raw materials, About 0.30%, and little fluctuation.