一、前言我厂资源综合利用工作始于五十年代初期。当时竖罐炼锌刚恢复生产,技术水平较低,生产问题繁多,对于冶炼过程的资源综合利用未得到应有的重视。锌精矿焙烧烟气中SO_2浓度低不能制酸,不得不排空,而制酸系统却焙烧黄铁矿生产硫酸,这就造成了资源浪费与环境污染,直接影响竖罐炼锌的前景。后 I. Introduction The comprehensive utilization of resources in our factory began in the early 1950s. At that time, vertical tank zinc smelting just resumed production, the technical level is low, the production of many problems, the comprehensive utilization of resources for the smelting process has not been given due attention. Zinc concentrate roasting flue gas in the low concentration of SO2 can not acid, had emptying, and acid system but pyrite roasting production of sulfuric acid, which resulted in waste of resources and environmental pollution, a direct impact on the prospects of zinc vertical tank. Rear