铜闪速炉沉淀池渣中锍液滴沉降机理及其影响因素

通过分析沉淀池内锍液滴的沉降机理,导出了渣中最大锍液滴直径的计算公式。根据闪速炉的实际生产条件,计算出渣中最大锍液滴直径的理论值为0.063 mm,并用矿相显微镜对沉淀池出口处的渣样进行了观察,渣中最大锍颗粒粒径为0.06 mm,两者结果一致。由此证明了沉降机理分析的正确性。在此基础上,进一步分析渣中锍夹带损失影响因素。结果表明:增大熔体中离散态分布的锍液滴直径是降低渣中铜夹带损失的重要措施;其次是升高渣温度有助于渣中锍的沉降;减小渣层厚度等措施对降低渣中铜夹带损失作用不大。

Settling mechanism and influencing factors on matte droplets in settler slag of copper flash smelting furnace

By analyzing the settling mechanism of the matte droplets in settler, the formulas for maximum diameter of matte particle were derived. Based on the real operating data in the copper flash smelting furnace, the theoretical value of maximum diameter of matte particle was calculated to be 0. 063 mm. Moreover, the slag at the outlet of settler was observed using ore microscope and the maximum diameter of matte droplets was 0.06 mm. The theoretical value of maximum diameter is in good agreement with the observed value. Thus, the validity of analysis of settling mechanism was verified. Based on the above results, factors of copper loss in slag were analyzed. The results indi- cate that firstly, increasing the diameters of discrete matte droplets in slag is an important means to reduce copper loss in slag~ secondly, it is also helpful to reduce copper loss by raising the temperature of slag, but it has little effect by reducing the thickness of the slag layer.