氧压浸锌高硫渣工艺矿物学研究及元素回收

Process Mineralogy and Element Recovery of High-Sulfur Slag Leaching Zinc

氧压浸锌是一种新兴的湿法浸锌工艺,工艺过程中将会产生40%高硫渣,由于高硫渣的颗粒不均匀,黏度大,工艺矿物学研究不深入,导致高硫渣的处理和利用难度大。以内蒙某锌冶炼厂的高硫渣、硫精矿、硫尾矿为研究对象,研究其工艺矿物学特性,以及有价金属铅、锌、铜、银等综合回收利用。采用XRF、偏光显微镜、SEM-EDS、激光粒度分析仪和MLA矿物解离分析仪等测试分析方法,探究高硫渣、硫精矿、硫尾矿的元素和矿物组成、粒度和矿物连生情况。高硫渣浮选硫回收率84.5%,硫尾矿投入奥斯麦特富氧顶吹炉铅冶炼系统后,Pb、Zn、Ag的回收率分别为95.3%、85.6%、96.91%。

Oxygen pressure zinc leaching is a new hydrometallurgy process.40% high-sulfur slag will be produced during the process.Due to uneven particle size and high viscosity of high sulfur slag,research on process mineralogy is not in-depth,which makes it difficult to treat and utilize high sulfur slag.Taking high-sulfur slag,sulfur concentrate and sulfur tailings from a zinc smelter in Inner Mongolia as research object,its process mineralogical characteristics,comprehensive recycling of valuable metals such as lead,zinc,copper and silver were studied.XRF,polarized light microscope,SEM-EDS,laser particle size analyzer and MLA mineral dissociation analyzer were used to explore elements,mineral composition,particle size and continuous growth of high-sulfur slag,sulfur concentrate and sulfur tailings.Sulfur recovery in flotation of high sulfur slag is 84.5%,recovery of Pb,Zn and Ag is 95.3%,85.6% and 96.91%,respectively,after sulfur tailings put into lead smelting system of Ausmelt oxygen-rich top-blown furnace.