铜富氧强化熔炼过程伴生铅锌元素定向分配行为调控

Directional distribution behavior regulation of lead and zinc in oxygen-enriched intensified copper smelting process

富氧底吹炼铜是一种典型的现代强化炼铜工艺。基于已建立的富氧底吹铜熔炼多相平衡模型,采集了国内某底吹炼铜厂实际生产数据对其进行验证,利用验证后模型对铜富氧底吹强化熔炼过程进行模拟计算,研究入炉物料成分(Cu、Fe、S)和工艺参数(铜锍品位、富氧浓度、氧矿比)变化对伴生元素Pb、Zn分配行为的影响。结果表明:提高入炉物料中Cu含量或降低Fe、S含量,适当提高铜锍品位、富氧浓度和氧矿比,有利于Pb、Zn伴生元素向炉渣中定向分离;为提高Pb、Zn脱除率,建议调控入炉物料中Cu、Fe、S含量分别为25%~26%、16%~19%、27%~28.5%,控制铜锍品位、富氧浓度、氧矿比分别为72%~73.5%、80%~81%、166~168 m3/t。

The oxygen-enriched bottom blowing copper smelting is a typical modern intensified copper smelting process.The established multi-phase equilibrium model of oxygen-enriched bottom blowing copper smelting was verified with industrial production data.The verified model was used to calculate the influence of the concentrate composition(Cu,Fe,S)and process parameters(copper matte grade,oxygen-enriched concentration,oxygen-ore ratio)on the distribution behavior of minor elements.The results show that,increasing the content of Cu or reducing the content of Fe and S in the concentrate,and appropriately increasing the copper matte grade,oxygen-enriched concentration and oxygen-ore ratio are beneficial to Pb and Zn into the slag.In order to improve the removal rate of Pb and Zn,it is recommended to adjust the Cu,Fe and S contents in the concentrate to 25%−26%,16%−19%,27%−28.5%respectively,and control the copper matte grade,oxygen enrichment concentration and oxygen ore ratio to 72%−73.5%,80%−81%,and 166−168 m3/t,respectively.