Abstract: The melting behavior of single manganese ore pellet containing carbon in converter Quarternary slag (51 CaO-16SiO₂-10MgO-23FeO) was investigated by experiments and mathematical model. The results showed that the sol¬id product layer was generated in the reduction process of manganese ore pellet containing carbon, and the rate of reduction can be accelerated by reduce the thickness and existing period of the solid product layer. Then the numerical model of melting process was established based on one-dimensional unsteady heat conduction differential equation, and the result of calculation was coinciding with the experimental data, thus illuminated that the model is effective. Simulated calculation to different conditions and the results showed that, reduction time of pellet can be shorten by about 35% to assume that the solid product layer not exist in reduction process when the temperature of the slag was 1 600 X.. Preheated pellet, reduce the pellet diameter and lower melting point of reduction product can reduce exist time of solid product layer, and improve the pellet reduction rate.

摘要： 采用实验模拟与数值模拟相结合的方法,对锰矿含碳球团在转炉4元熔渣（51CaO-16SiO₂-10MgO-23FeO）中的熔化行为进行研究。结果表明,锰矿含碳球团在熔渣中还原时生成了固态产物层,减少固态产物层的厚度和存在时间,能加快球团在熔渣中的还原速度;基于一维非稳态导热微分方程建立了含碳球团熔化过程的数值模型,模型计算与实验结果能较好吻合;采取不同条件进行模拟计算发现,当熔渣温度为1 600℃时,假设固态产物层不存在,球团还原时间可缩短35%左右;对锰矿含碳球团进行预热、适当缩小球团直径及降低还原产物熔点均能减少固态产物层存在时间,从而提高球团还原速度。

关键词: 渣浴还原, 含碳球团, 熔化行为