湿法炼锌氧化锌脱硫-空气氧化工艺优化  

Process Optimization of Zinc Oxide Desulfurization-Air Oxidation Process in Zinc Hydrometallurgy

作　　者：马菲菲[1] 李德磊[1] 王有健[1] MA Fei-fei;LI De-lei;WANG You-jian

机构地区：[1]白银有色集团股份有限公司西北铅锌冶炼厂,甘肃白银730900

出　　处：《有色冶金节能》2022年第3期33-36,共4页Energy Saving of Nonferrous Metallurgy

摘　　要：某企业湿法炼锌氧化锌脱硫-空气氧化工艺存在氧化不彻底的问题,未被氧化彻底的ZnSO_(3)与浸出沉矾工序中的Fe^(3+)反应,将其还原为Fe^(2+),导致Fe^(2+)含量偏高,沉矾上清液返回中性浸出工序时锰矿粉消耗增加。本文分析了制酸设备、焙烧投矿量、氧化温度、脱硫塔液位等因素对脱硫液空气氧化的影响,并提出了一系列改进措施,进行实验研究最佳空气氧化条件。实验结果表明,最佳空气氧化条件为:氧化温度40~45℃,反应时间3 h,空气压力0.15 MPa。经过措施改进,脱硫液氧化效果大大改善,降低了锰矿粉消耗,提高了电效。The problem of incomplete oxidation exists in the zinc hydrometallurgical process of zinc oxide desulfurization-air oxidation in an enterprise.The incompletely oxidized ZnSO_(3) react with Fe^(3+) in the leaching and jarosite precipitation section and reduced it to Fe^(2+).The high Fe^(2+) content in that section increased the consumption of manganese ore powder.This article analyzed effects of acid making equipment,roasting feed quantity,oxidation temperature,level in desulfurization tower and other factors on the air oxidation of desulfurization solution and raised a series of measures.And experimental study was conducted to find the optimum air oxidation conditions.Experiment results show that the optimum air oxidation conditions are as follows:40~45℃oxidation temperature,3 h reaction time and 0.15 MPa air pressure.By the optimization measures,the oxidization efficiency of the desulfurization solution is substantially improved,the consumption of manganese ore powder is reducing,and the electric efficiency is improving.

关 键 词：脱硫氧化 亚硫酸锌 投矿量 空气压力 

分 类 号：TF813[冶金工程—有色金属冶金]