锌焙烧系统污酸综合利用实验研究  

Experimental Study on Comprehensive Utilization of Waste Acid from Zinc Roasting System

作　　者：曾淑琴[1] 曾桂忠[1] 赵贺永[1] 

机构地区：[1]文山学院化学与工程学院,云南文山663000

出　　处：《广州化工》2016年第19期98-100,共3页GuangZhou Chemical Industry

基　　金：文山学院校级课题基金(项目编号:15WSY21)

摘　　要：锌湿法冶炼工艺沸腾焙烧过程产生大量高砷高氟的污酸废水。针对含砷、氟高的污酸废水,先采用硫化钠与其中的砷、铜、铅、镉反应生成相应的金属硫化物,使其从溶液中沉淀出去,再将溶液在浓缩塔中蒸馏浓缩,随着硫酸浓度的升高,污酸中的氟离子将以氟化氢气体的形式挥发出去,最终得到可以利用的杂质含量少且质量分数在30%以上的硫酸,此含量30%以上硫酸可代替纯硫酸用于选矿厂浮选实验,从而使处理后的污酸实现了资源化利用。Fluidized bed roasting process of zinc hydrometallurgical produces a large number of waste acid water with high contents of As and F. For waste acid water with high As and F, used sodium sulfide to precipitate out of metallic elements As, Cu, Pb and Cr in solution, the solution was concentrated in concentrated distillation column, the concentration of sulfuric acid increased, fluoride in waste acid will form hydrogen fluoride gas volatiles, ended up with less impurity content and content of sulfuric acid in solution of more than 30% , the acid can replace the pure sulfuric acid used in mineral processing plant flotation tests, so that the treated waste acid can achieve resource utilization.

关 键 词：污酸 综合利用 浮选 

分 类 号：X78[环境科学与工程—环境工程]