以含碳固废为还原剂的铜渣颗粒直接还原正交实验

左宗良; 罗思义; 于庆波; 张敬奎

doi:10.3969/j.issn.1000-6532.2022.05.009

以含碳固废为还原剂的铜渣颗粒直接还原正交实验

Orthogonal Experiments of Copper Slag Particles Direct Reduction by Carbon-Containing Solid Waste Reductant

摘要

摘要: 通过转杯离心粒化法制备铜渣颗粒。以铜渣颗粒、碳质还原剂、粘结剂和造渣剂为主要原料制备铜渣含碳球团，在实验条件下，六种考查因素对铜渣含碳球团还原率影响的主次关系为：反应温度>造渣剂配比>气氛>还原剂种类>铜渣粒径>还原剂配比。通过极差分析得出铜渣含碳球团直接还原较佳还原条件：反应温度为1150℃，造渣剂配比(S/CaO)为1∶0.4，实验气氛为CO₂(50%)N₂(50%)，还原剂为煤粉，铜渣粒径为+0.425 mm，还原剂配比(C/O)为1.2∶1，此时铜渣的还原率为98.2%。

Abstract: Copper slag particles were prepared by rotary cup atomizer. Carbon-containing copper slag pellets were prepared by copper slag particles, carbon reductant, binder and slag former. The effects of six factors on reduction ratio of carbon-containing copper slag pellets were in accordance with the sequence of reaction temperature > the ratio of slag former > atmosphere > the types of reduction reductant > particle size of copper slag > the addition ratio of reductant, under experiment conditions. The optimum condition for direct reduction of carbon-containing copper slag pellets was that the reaction temperature was 1150℃, the ratio of slag former was 1∶0.4, atmosphere was CO₂(50%)+N₂(50%), the reductant was coal, particle size of copper slag was +0.425 mm and the addition ratio of reductant was 1.2∶1. On this condition, the reduction ratio of copper slag is 98.2%.

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