电解废液与锌冶炼烟尘协同处理试验研究
Experimental study on synergistic treatment of zinc electrolytic waste liquid and zinc smelting flue dust
解万文 1文堪 1王铧泰 1刘远 1周华荣 1高昭伟1
作者信息
- 1. 西部矿业集团科技发展有限公司,青海西宁 810006;青海省高原矿物加工工程与综合利用重点实验室,青海西宁 810006;青海省有色矿产资源工程技术研究中心,青海西宁 810006
- 折叠
摘要
为综合回收锌冶炼烟尘及电解废液中的有价金属,本研究进行了利用锌电解废液浸出锌冶炼烟尘试验,通过一段浸出、碳酸钠中和沉锌及氢氧化钠中和沉镁等工序获得了沉锌产品和沉镁产品,通过两段浸出、萃取反萃、中和沉铟等工序获得了富铟渣及副产物铅银渣.试验最佳工艺条件:一段浸出为液固比4∶1,浸出温度80 ℃,浸出时间75 min,在此条件下,锌浸出率可达78.69％,铟浸出率仅为8.4％;锌镁分离最佳终点pH值区间为6.86～7.80;二段浸出最佳工艺条件为终点pH值1.08,液固比3∶1,浸出温度75 ℃,浸出时间10 h,在此条件下,铟浸出率可达86.84％.该研究可为炼锌厂开路除杂及综合回收有价金属提供新思路.
Abstract
In order to comprehensively recover valuable metals from zinc smelting fuel dust and electrolytic waste liquid,a synergistic treatment experiment of zinc smelting electrolytic waste liquid and oxygen pressure leaching zinc smelting fuel dust was researched,zinc and magnesium precipitation products were obtained through a process of leaching,neutralization of zinc precipitation with sodium carbonate,and neutralization of magnesium precipitation with sodium hydroxide,indium-rich slag and by-product lead silver slag were obtained through two-stage leaching,extraction-stripping and indium neutralization-precipitation,and the experimental conditions were optimized.The results show that the liquid-solid ratio is 4∶1,the leaching temperature is 80 ℃,and the leaching time is 75 minutes.under these conditions,the zinc leaching rate can reach 78.69％,while the indium leaching rate is only 8.4％;the optimal endpoint pH range for zinc magnesium separation is 6.86 to 7.80;the endpoint pH value is 1.08,the liquid-solid ratio is 3:1,the leaching temperature is 75 ℃,and the leaching time is 10 h,which is the optimal process conditions for two-stage leaching,under these conditions,the leaching rate of indium can reach 86.84％,which can provide new ideas for open circuit impurity removal and comprehensive recovery of valuable metals in zinc smelting plants.
关键词
氧压浸出/炼锌烟尘/炼锌电解废液/协同处理/综合回收/以废治废Key words
oxygen pressure leaching/zinc smelting dust/zinc electrolytic waste liquid/collaborative processing/comprehensive recovery/treat waste with waste引用本文复制引用
出版年
2024
NETL
NSTL
万方数据