Ausmelt炉冶炼渣含铜等离子体贫化探索

新疆五鑫铜业有限责任公司采用Ausmelt铜冶炼技术,电炉贫化渣含铜量为0.5% ~ 0.7%,比国内一些正在开采利用的原生铜矿品位还要高,具有极大的利用潜力。本文首次将等离子体技术用于铜渣贫化,试验结果表明：等离子体具有的瞬间高温,可以打破渣中无定形玻璃体包裹,使铜粒子聚集长大,降低贫化渣含铜量；在以氮气作为工作气体,气体流量 40L/min,反应时间 20 min,静置 120 min的试验条件下,等离子体反应可以将熔炼渣含铜降低至 0.36%；添加焦炭能提高等离子贫化反应效率,贫化后可将渣含铜降至 0.3%以下。

Investigation on Plasma Dilution of Cu-Containing Slag in Ausmelt Furnace

Xinjiang Wuxin Copper Industry Co., Ltd. adopts Ausmelt copper smelting technology, and the copper content in slag of the electric furnace is 0.5% ~ 0.7%, which is higher than the grade of some domestic primary copper ore that is being mined and utilized, so it has a great potential for utilization. The plasma technology has been applied to the dilution of copper slag for the first time In this paper. The experimental results show that the instantaneous high temperature of the plasma can break the amorphous vitreous encapsulation in the slag, make the copper particles gather and grow up, and reduce the copper content in the dilution slag. Under the experimental conditions of nitrogen as working gas, gas flow 40L/min, reaction time 20 min and standing for 120 min, the copper content of smelting slag can be reduced to 0.36% by plasma reaction. The addition of coke can improve the reaction efficiency of plasma dilution, and the copper content of slag can be reduced to less than 0.3% after dilution.