铜顶吹熔炼过程中砷元素的走向调控研究
Regulation of arsenic element trend in copper top-blown smelting process
赵壁 1任永专 1贾文磊 2张宇云 1周世伟 2李博2
作者信息
- 1. 凉山矿业股份有限公司,四川 会理 615100
- 2. 昆明理工大学 冶金与能源工程学院,云南 昆明 650093
- 折叠
摘要
随着铜精矿品位逐渐下降,精矿中的杂质元素越来越多,其中有害元素砷在冶炼过程中很难脱除,且在铜熔炼系统中循环累积,最终影响阴极铜的质量.某冶炼企业铜顶吹熔炼生产实践中,有害砷元素在烟尘中的分配比例为55%～75%,在铜锍相中分配比例为5%～15%,在渣相中分配比例为20%～35%.本文主要对铜顶吹熔炼过程中砷的分布与走向调控手段进行了理论分析,并在实验室条件下探究了熔渣中Fe/SiO2、富氧浓度、铜锍品位、渣中CaO含量等工艺参数对不同产出物中砷分配率的影响规律,获得了砷进入渣相的有效调控措施.优化工艺参数后,As在渣中占比为30%～40%,烟尘中占比为50%～60%,铜锍中占比为10%～20%,解决了铜冶炼过程砷进入硫酸系统形成大量污酸的问题,从而控制各个产品中砷的含量.
Abstract
With the gradual decline of copper concentrate grade,impurity elements gradually increase,and the harmful element arsenic is difficult to remove and accumulates in the copper smelting system,which has a great impact on the quality of copper cathode.Combined with the actual production of copper top-blown melting,the distribution ratio of harmful arsenic elements in the dust is 55%～75%,that in the matte phase is 5%～15%,and that in the slag phase is 20%～35%.In this paper,the distribution and direction of arsenic in the copper top-blown melting process is theoretically analyzed,and the influence law of process parameters such as Fe/SiO2 in slag,oxygen-rich concentration,matte grade,CaO content in slag on the distribution rate of arsenic in different products is investigated under laboratory conditions,and effective control measures for arsenic entering the slag phase are obtained.After optimizing the process parameters,the proportion of As in slag is 30%～40%,the proportion in dust is 50%～60% and the proportion in matte is 10%～20%,which solves the problem that a large amount of arsenic enters the sulfuric acid system to form arsenic slag during copper smelting and improves the adaptability of raw materials,thus controlling the content of arsenic in each product.
关键词
低温熔炼/顶吹/砷走向/调控措施/工艺参数/铜精矿Key words
low-temperature melting/top-blown/arsenic trend/control measures/process variable/copper concentrate引用本文复制引用
基金项目
云南省科技厅计划项目-基础研究专项(202101AW070007)
出版年
2024
NETL
NSTL
维普
万方数据