从氰化尾渣衍生物制备标准铅、锌精矿的新工艺

汪  洋^1,2，李仕雄³， 诸向东³，於智泉³

(1. 中南大学 地球科学与信息物理学院，长沙 410083；
2. 中南大学 有色金属成矿预测教育部重点实验室，长沙 410083；
3. 中南大学 冶金科学与工程学院，长沙 410083)

摘 要：以氰化尾渣衍生物为原料，制备标准铅、锌精矿。采用X体系在常压下进行氧化浸出，研究浸出电位、氧化剂、总酸量、试剂A、试剂B、浸出时间和浸出温度对锌回收率、锌精矿品位以及铅浸出率的影响。结果表明：采用二段浸铅与气液固强化浸出相结合的方法在高效气液固反应器中进行实验，其最优条件如下：试剂A量15.6 g/L，试剂B量90 g/L，液固比L/S=10:1，鼓氧量1.5 L/min，浸出温度70 ℃，每段浸出时间均为3 h。所得铅精矿和锌精矿氧量品位分别高达75.49%和45%，副产品硫磺的品位达到99%，其中，铅、锌总回收率分别为90.68%和99%，单质硫的回收率高达99.1%。

关键词：氰化尾渣衍生物；氧化浸出；铅精矿；锌精矿

Innovative technology for preparing lead and zinc concentrates from cyanide tailing derivatives

WANG Yang^{1, 2}, LI Shi-xiong³, ZHU Xiang-dong³, YU Zhi-quan³

(1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Centr)

Abstract:The standard lead and zinc concentrate were prepared from cyanide tailings derivatives. By using X system in the atmospheric pressure for oxidize leaching, the influences of leaching potential, antioxidants, total acid amount, reagent A, reagent B, leaching time and leaching temperature on zinc recovery rate, zinc concentrate grade and lead leaching rate were studied. The results show that the experiments are performed in the high efficient gas-liquid-solid reaction tank combining the methods of two-section lead leaching and gas-liquid-solid intensification leaching. The optimal conditions are as follows: reagent A 15.6 g/L, reagent B 90 g/L, liquid-solid ratio L/S=10:1, drummed O₂ speed 1.5 L/min, temperature 70 ℃, leaching time 3 h for each section. Eventually, the grades of lead and zinc concentrate obtained are 75.49% and 45%, respectively, with sulfur grade of up to 99% as the by-product. Moreover, the total recovery rates of lead and zinc are 90.68% and 99%, respectively, and the recovery rate of elemental sulfur is 99.1%.

Key words:cyanide tailings derivatives; oxidation leaching; lead concentrate; zinc concentrate