砷铅高杂铜锍富氧强化吹炼机理研究及工艺优化  

Mechanism investigation and process optimization for oxygen enriched intensified converting of arsenic-lead-bearing copper matte

作　　者：田苗 王亲猛[1,2] 王松松 李伟[3] 郭学益 TIAN Miao;WANG Qin-meng;WANG Song-song;LI Wei;GUO Xue-yi(School of Metallurgy and Environment,Central South University,Changsha 410083,China;National and Regional Joint Engineering Research Center of Nonferrous Metals Resources Recycling,Central South University,Changsha 410083,China;Daye Nonferrous Metals Co.,Ltd.,Huangshi 435000,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]中南大学有色金属资源循环利用国家地方联合工程研究中心,长沙410083 [3]大冶有色金属有限责任公司,黄石435000

出　　处：《中国有色金属学报》2023年第8期2647-2665,共19页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(U20A20273);湖南省杰出青年科学基金资助项目(2022JJ10078);中南大学创新驱动资助项目(2020CX028);国家重点研发计划资助项目(2022YFC3901500)。

摘　　要：砷铜锍(Cu_(3)As)、铅铜锍(Cu_(2)S、PbS)是粗铅精炼除铜渣熔炼副产物,属于毒性危险废物。本文提出富氧底吹强化吹炼法处理砷铜锍、铅铜锍,富集回收Cu和分离脱除Pb、As。通过热力学计算,阐明了Cu、Pb、As吹炼反应机理及元素物相演变规律,确定吹炼优化条件,并开展工业生产。结果表明:1250℃下,砷铜锍、铅铜锍富氧底吹强化吹炼经氧化、还原两阶段产出粗铜、吹炼渣及烟气。粗铜中Cu、As含量(质量分数)分别为93.94%、3.85%;原料中60.42%Cu富集至粗铜,27.43%Cu损失于吹炼渣;Pb在吹炼渣、烟气的分配率分别达到82.77%、17.22%;As在烟气和吹炼渣的分配率达89.46%。砷铜锍、铅铜锍富氧底吹强化吹炼实现了Cu向粗铜中定向富集,并将Pb、As脱除至吹炼渣和烟气,可用于含砷复杂资源高效处理。Speiss(Cu_(3)As)and lead copper matte(Cu_(2)S,PbS)are toxic wastes derived from the high-arsenic copper smelting process.This study proposed an oxygen-enriched bottom-blown intensified converting technique to extract Cu and remove Pb/As from the speiss and lead copper matte.The reaction mechanism and distribution behavior of Cu,Pb,and As in the converting process were clarified using thermodynamic calculation.The optimal converting conditions for Cu recovery and Pb/As removal were proposed and employed in industrial practice.The results show that blister copper,converting slag,and flue gas are produced from the oxygen-enriched bottom-blown intensified converting of the speiss and lead copper matte via oxidation and reduction stages at 1250℃.The concentrations of Cu and As in the blister copper are 93.94%and 3.85%,respectively.Approximately 60.42%of Cu from the speiss and lead copper matte is distributed to blister copper,while 27.43%of Cu is lost in the converting slag.The removal efficiency of Pb in the converting slag and dust reaches 82.77%and 17.22%,respectively.As removal efficiency into the converting slag and flue dust is 89.46%.The oxygen-enriched bottom-blown intensified converting technology shows excellent advantages in extracting Cu and removing Pb/As of the speiss and lead copper matte,providing an efficient approach for recycling high-arsenic complicated resources.

关 键 词：Cu_(3)As 富氧吹炼 脱砷 反应机理 分配行为 

分 类 号：TF811[冶金工程—有色金属冶金]