高炉粉尘在铁浴熔融还原发泡过程的研究

Research on the foaming process of smelting reduction of blast furnace dust and sludge in iron bath

确定了在不同条件下铁水熔池熔融还原高炉粉尘发泡过程的曲线.应用试验数据和发泡性能方程,给出了定量描述内生气源发泡过程的发泡和消泡系数、平均发泡寿命和发泡强度等发泡特性参数.由实验结果建议熔池的温度控制在1500℃左右.熔渣中二元碱度在1.2~1.3的范围内,Al2O3的含量一般要低于16%,加入高炉粉尘的量不应超过熔渣重量的一半.

The foaming process curve under different conditions has been determined in iron bath during smelting reduction of blast furnace dust and sludge. The formation and rupture coefficients, the average foam life and foaming density for quantitative description of the foam caused by reduction gas have been given by means of experimental data and foam behavior equations. From the experimental results a suggestion is given that the temperature of iron bath should be controlled at about 1500°C. In the slag, the binary basicity is 1.2-1.3 and the content of Al2O3 is lower than 16%. The added amount of blast furnace dust and sludge should be less than half of the slag weight.