为了最大程度地回收铜渣中的铁资源、得到高品质的珠铁产品,在实验室条件下模拟转底炉,使用高温炉焙烧还原由铜渣、还原煤、石灰石制备的含碳球团,直接还原生成珠铁和渣,再通过人工挑选的方式实现渣铁分离.研究了焙烧温度、焙烧时间、还原煤用量、石灰石用量等因素对焙烧效果、珠铁全铁品位、铁回收率的影响,确定较佳的球团配料比为铜渣:还原煤:石灰石=100:20:10,较佳的焙烧条件为焙烧温度1400℃、焙烧时间40 min,最终可获得铁回收率91.04%、全铁品位94.72%、C含量1.23%的高品质珠铁.%Some experiments were conducted aiming at production of high-quality granular iron products by recycling iron resources in copper slag as much as possible. In the experiments, muffle furnace was used to simulate the laboratory condition of the rotary hearth furnace. Carbon-containing pellets prepared with copper slag, reduced coal and limestone, were subjected to a direct reduction roasting in a high-temperature furnace, with granular iron and slag obtained. The iron could be separated from slag by the following manual selection process. Influences of factors, including roasting temperature, roasting time, dosage of reduced coal and limestone on reduction effect, TFe grade of granular iron, iron recovery rate were all investigated. It is found that the following optimal processing parameters, including a mass ratio of copper slag, reduced coal and limestone at 100:20:10, a roasting temperature of 1400 ℃ and a roasting time of 40 min, can produce a high-quality granular iron with TFe grade of 94.72% at a recovery of 91.04%, with carbon content of 1.23%.
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