低品位氧化锌矿硫酸浸出工艺研究.pdf

第 22 卷第 3 期矿
冶
工
程 Vol. 22
2
2002 年 9 月 MINING AND METALLURGICAL ENGINEERING September 2002

低品位氧化锌矿硫酸浸出工艺研究
蓝卓越, 胡岳华, 黎维中
( 中南大学矿物工程系, 湖南长沙 410083)
摘
要: 研究了高硅低品位氧化锌矿的硫酸浸出工艺。在保持矿浆 pH= 2. 0, 控制加酸量和加酸速度的条件下, 锌的浸出率大于
97% , 而硅和铁的浸出率只有 13% 和 0. 84% 甚至更低, 每吨锌耗酸 1. 76 t。添加氧化铁硫杆菌浸出, 锌的浸出率有所增长, 同时利于
沉淀除铁, 降低浸出液中铁的含量。采用渗滤浸出方案, 锌的浸出率大于 95% , 硅、铁的浸出率只有 3. 6% 和 0. 6% 。
关键词: 低品位氧化锌矿; 硫酸浸出; 浸出率; 细菌浸出; 渗滤浸出
Sulfuric Acid Leaching of Low- grade Zinc Oxide Ore
A Study
LAN Zhuo-yue, HU Yue-hua, LI We-i zhong
( Department of Mineral Engineering of Central South University , Changsha 410083, Hunan , China )
Abstract: Sulfuric acid leaching of low-grade zinc oxide ore is studied in this paper. At pH of 2. 0 leaching rate of above 97%
can be achieved only by controlling addition of sulfaric acid( ie. dosage and rate) . At the same time leaching rates of silico
and iron can be reduced to 13% and 0. 84% or much less, respectively, and the consamption of sulfuric acid is 1. 76 t per
ton zinc. Addition of thiobacillus ferrooxidans can enhance the reaching rate of zinc slightly and is favorable for iron precipita-
tion, which can reduce the content of iron in leach solution. Percolation leaching can achieve leaching rates of above 95% Zn,
3. 6% Si and 0. 6% Fe, respectively.
Key words: low-grade zinc oxide ore; sulfuric acid leaching; leaching rate; bacterial leaching; perco