结合我国引进氧气顶吹自热熔炼技术处理二次铜精矿直接生产粗铜的实际，探讨纯氧自热熔炼熔化机理。在冷态模型试验和热态试生产的基础上，建立了氧气顶吹自热炉内高温熔体的速度场和温度场数值模型并进行数值计算，结果与实测值基本吻合。此模型可以用于指导生产过程的自动控制。 Combined with the introduction of oxygen top-blown self-smelting technology to deal with the secondary copper concentrate directly to the production of blister copper, explore the mechanism of pure oxygen self-heating melting. Based on the cold model test and the hot test production, the numerical model of the velocity field and the temperature field of high temperature melt in oxygen top-blowing self-heating furnace is set up. The numerical results are in good agreement with the measured values. This model can be used to guide the automatic control of the production process.