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依据实验数据计算结果,对钢液增氧的因素及其采取的相应措施进行了分析与探讨。研究结果表明:在氧化性顶渣条件下,钢液中w([Als])的变化率≥20%,而在还原性顶渣条件下,钢液中w([Als])的变化率≤10%;氧化性顶渣对钢液供氧的贡献率大于钢包与中间包衔接的水口处吸气对钢液供氧的贡献率;减少转炉下渣量及对顶渣进行改质可减轻炉渣向钢液供氧程度;大罐下渣量不会使中间包成为新的增氧源。
Based on the calculation results of the experimental data, the factors affecting the oxygenation of liquid steel and the corresponding measures taken are analyzed and discussed. The results show that the change rate of w ([Als]) in molten steel is higher than 20% under the condition of oxidized top slag and the change rate of w ([Als]) in molten steel under reducing top slag is less than or equal to 10%. The contribution of oxidized top slag to the liquid steel oxygen supply is greater than the contribution of inspiratory air to the molten steel at the nozzle where the ladle and the tundish are connected. Reducing the amount of slag under the converter and modifying the top slag can reduce the slag The level of oxygen supplied to the liquid steel; the amount of slag in the jar does not make the tundish a new source of oxygen.