铅精矿全湿法工艺研究

采用L9( 34 )正交试验法考查FeCl3 浸出铅精矿的工艺条件 ,结果表明 ,在 ( 95± 5 )℃ ,粒径- 0 178mm ,NaCl 30 0g/L ,FeCl32 0 0g/L ,pH =0～ 1,15～ 2 0min ,搅拌速度 75～ 80r/min ,液固比 6∶1条件下进行浸出 ,铅浸出率 99%以上。PbCl2 经过精制、脱氯、煅烧后生产黄丹 ,铅总回收率大于 95 %。在液固比 5∶1,95～ 10 0℃ ,30～ 40min ,室温冷却条件下 ,采用有机脱硫剂RE取代CS2 对含元素硫的浸出渣脱硫 ,脱硫率达 98%,产品硫磺纯度 95 %,硫磺回收率大于 90 %。浸出液中的FeCl2 分离后 ,在常压下采用富氧催化氧化代替氯气氧化 ,再生氧化剂FeCl3 可循环使用。

The Hydrometallurgical Study on Lead Concentrate

The FeCl 3 leaching technology of lead concentrate are studied using L 9(34) orthogonal experiment, the results show that the lead leaching rate is more than 99% on the following conditions: (95±5)℃, -0.178mm, NaCl 300 g/L,FeCl 3 200 g/L,pH=0～1, 15～20min, 75～80r/min,L/S=6∶1. PbCl 2 solution is used to produce PbO after refined, dechlorinated and calcined, the lead overall recovery is more than 95%. The leaching slag is de-sulphurated using desulfurizer RE substitute for CS 2, the de-sulphuration rate is 98% on the following conditions: L/S=5∶1, 95～100℃, 30～40min, cooled in room temperature. The sulphur recovery rate is more than 90%. The FeCl 2 in the solution is circulated after separated and oxidized by oxygen.