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过程工程学报 ›› 2020, Vol. 20 ›› Issue (11): 1304-1312.DOI: 10.12034/j.issn.1009-606X.219376

• 过程与工艺 • 上一篇    下一篇

资源化消纳高浸铅银渣底吹+侧吹炼铅工艺优化

杨 泽1, 崔雅茹1*, 郝 禹1, 赵 律2, 王正民2, 张庭亮2, 赵俊学1, 朱 凡1   

  1. 1. 西安建筑科技大学冶金工程学院,陕西 西安 710055 2. 汉中锌业有限责任公司,陕西 勉县 724204
  • 收稿日期:2019-12-24 修回日期:2020-02-16 出版日期:2020-11-22 发布日期:2020-11-20
  • 通讯作者: 崔雅茹
  • 基金资助:
    镍造锍熔炼熔渣微结构演化机制及过程中Ni、Co迁移行为研究;含易挥发组元炉渣性能测定误差影响机制研究;含铅渣组分高温挥发迁移机制及其对性能测定;铅冶炼造渣工艺与配料模型优化研究

Optimization on bottom blowing+side blowing lead smelting for utilizing of lead?silver leaching residues

Ze YANG1, Yaru CUI1*, Yu HAO1, Lü ZHAO2, Zhengmin WANG2, Tingliang ZHANG2, Junxue ZHAO1, Fan ZHU1   

  1. 1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China 2. Hanzhong Zinc Industry Co., LTD., Mianxian, Shaanxi 724204, China
  • Received:2019-12-24 Revised:2020-02-16 Online:2020-11-22 Published:2020-11-20
  • Contact: CUI Ya-ru

摘要: 铅锌资源互补是企业实现多金属综合回收的主流方向。针对汉中锌业底吹+侧吹炼铅系统混配高浸铅银渣、冶炼烟灰等含铅物料后,面临的氧化熔炼热量不足、炉渣过程控制困难、还原渣稳定性差等难题,在对原有工艺综合评价基础上,结合热力学分析和炉渣性能测定结果,提出了以渣型调控为主线的工艺优化思路。研究表明,底吹炉补热方式由硫磺为主转向以烟煤为主、硫铁矿为辅,可提升氧化熔炼温度至1050℃,还原熔炼降温至1250℃;控制还原熔炼渣FeO/SiO2质量比在1.2~1.6,CaO/SiO2质量比在0.4~0.6之间,ZnO≤20wt%,可确保混配含铅废料的直接炼铅过程顺行。工艺优化后,氧料比由120 Nm3/t降至110 Nm3/t,混配高浸铅银渣比例升至24wt%;氧化熔炼与还原熔炼烟尘率同比降低13.47%与15.82%,粗铅成本同比降低10.63%。

关键词: 底吹+侧吹炼铅, 高浸铅银渣, 炉渣性能, 渣型调控, 工艺优化

Abstract: The comprehensive recovery and complementation of lead and zinc resources is the main developing trend for lead and zinc enterprises. This work aim is to solve the problems, such as lack of heat in oxidizing smelting, difficulty in process control of slag, poor stability of reducing slag, etc, emerged in the bottom blowing-side blowing lead smelting system mixed with lead?silver leaching residues in Hanzhong Zinc Industry Co., LTD. On the basis of comprehensive evaluation of the original process, thermodynamic analysis on dominant region and phase diagram of melting process were calculated, the slag properties were determined, and subsequently, optimizing process based on regulation of slag system were put forward. The results showed that the temperature of oxidizing smelting was raised to 1050℃ and the reduction smelting was lowered to 1250℃, though adjusting heating mode of the bottom blowing furnace from sulfur to bituminous coal and pyrite as auxiliary. The direct lead-smelting process mixed with lead-containing residues can be operated smoothly though controlling reduction smelting slag, in which FeO/SiO2 mass ratio was 1.2?1.6, CaO/SiO2 mass ratio was 0.4?0.6, and ZnO≤20wt%. After process optimization, the ratio of oxygen to material decreased from 120 Nm3/t to 110 Nm3/t, and the proportion of lead?silver leaching slag mixed in charge materials increased to 24wt%. In the meanwhile, the dust content of smelting flue gas in oxidation and reduction smelting reduced by 13.47% and 15.82%, respectively, and the cost of crude lead reduced by 10.63% as a result.

Key words: the bottom blowing-side blowing lead smelting, lead-silver leaching residues, slag properties, slag type regulation, process optimization