湿法炼锌三段类黄钾铁矾法浸出工艺应用探究  

Exploration on the Application of Three-Stage Jarosite Leaching Process for Zinc Hydrometallurgy

作　　者：王红吉 王昕 金忠 王张斌 李亚东 王鹏 赵利兵 WANG Hong-ji;WANG Xin;JIN Zhong;WANG Zhang-bin;LI Ya-dong;WANG Peng;ZHAO Li-bing

机构地区：[1]甘肃厂坝有色金属有限责任公司成州锌冶炼厂,甘肃陇南742500

出　　处：《有色冶金节能》2022年第6期26-30,45,共6页Energy Saving of Nonferrous Metallurgy

摘　　要：本文以湿法炼锌浸出工艺配套回转窑无害化处理锌浸出渣的经济性、环保性等为切入点,提出了三段类黄钾铁矾法浸出工艺。探究该工艺产出的中上清液质量、工艺过程控制中Fe^(2+)、Fe^(3+)、H^(+)等含量变化,研究该工艺的锌浸出率、渣率、渣含锌量等经济技术指标的特性,分析配套回转窑无害化处理锌浸出渣的优势。根据生产实践,三段类黄钾铁矾工艺产出的中上清液质量与常规法、黄钾铁矾法产出的中上清液质量相近,能满足湿法炼锌净化工序的要求,三段类黄钾铁矾工艺锌浸出率为94.67%、渣率为37.27%、渣含锌量和含硫量分别约为8%和10%,且液固分离效果良好。三段类黄钾铁矾法浸出工艺具有流程短、能源消耗低、渣率较小、产出的浸出渣含锌量适中、含硫量较低,适宜于配套回转窑无害化处理的特点。In this paper, the three-stage jarosite leaching process was proposed based on the economy and environmental protection of the harmless treatment of zinc leaching residue in rotary kiln equipped with zinc hydrometallurgy leaching process. The quality of the supernatant produced by the process and the change of Fe^(2+), Fe^(3+), H^(+) and other contents in the process control were investigated. The characteristics of the economic and technical indicators of the process, such as zinc leaching rate, slag rate, zinc content in slag, were studied. The advantages of supporting rotary kilns in harmless treatment of zinc leaching slag were analyzed. According to the production practice, the quality of the medium and supernatant produced by the three-stage potassium jarosite process is similar to that produced by the conventional method and potassium jarosite, which can meet the requirements of the purification process of zinc hydrometallurgy. The zinc leaching rate of the three-stage potassium jarosite process is 94.67%, the residue rate is 37.27%, the zinc content and sulfur content of the residue are about 8% and 10% respectively, and the liquid-solid separation effect is good. The three-stage potassium jarosite leaching process has the advantages of short process, low energy consumption, low residue rate, moderate zinc content and low sulfur content in the leached residue, which is suitable for the harmless treatment of rotary kiln.

关 键 词：黄钾铁矾法 针铁矿法 喷淋除铁法 转化法 锌浸出渣 除铁 回转窑 

分 类 号：TF813[冶金工程—有色金属冶金]