氧化酸浸—酒石酸络合法从铅渣选铁尾矿中回收锑铜  

Antimony and Copper Recovery from Iron Tailings Generated from Lead Slag Using Oxidizing Acid Leaching-Tartaric Acid Complexation

作　　者：杨慧芬[1,2] 李彩红[1,2] 王传龙[1,2] 谭海伟[1,2] 孟家乐 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]金属矿山高效开采及安全教育部重点实验室,北京100083

出　　处：《金属矿山》2015年第9期175-180,共6页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA062406)

摘　　要：采用氧化酸浸—酒石酸络合法对铅渣煤基直接还原—磁选尾矿中的锑、铜进行了浸出回收试验。结果表明:1在硫酸用量为169.5 g/L、双氧水为12.50 mg/L、液固比为6∶1、温度为90℃下氧化酸浸60 min,锑、铜的浸出率分别为64.37%、85.41%,浸出率均较低。2酒石酸可通过络合反应抑制Sb3+、Cu2+的水解来提高锑、铜的浸出率。酒石酸用量为25 g/L情况下络合反应10 min,锑、铜的浸出率分别可达78.79%、90.72%,较不加酒石酸分别提高了14.42、5.31个百分点。3滤液p H值可影响Sb3+、Cu2+的稳定性,进而影响锑、铜的浸出率。滤液的p H值从7.0降至1.5,锑、铜的浸出率从78.79%、90.72%提高到86.07%、91.58%。因此,在原料氧化酸浸提取锑、铜过程,加酒石酸络合剂,并控制滤液的p H值,可有效抑制Sb3+、Cu2+的水解,提高锑、铜的浸出率。Recovery of antimony and copper by oxidation acid solution-tartaric acid complexation leaching methods from tailings of lead slag coal-based direct reduction was conducted. The results showed that：（1）leaching rate of antimony and copper were only 64.37% and 85.41% respectively under the optimal conditions of sulfuric acid 169.5 g/L,hydrogen peroxide 12.50 mg/L,liquid to Solid ratio 6 ： 1 at 90 ℃ oxidized reaction 60 rain. （2） Hydrolysis of Sb3＋and Cu2＋ ion can be inhibited by compl- exation reaction using tartaric acid. Leaching rate of antimony and copper were＇,78： 79% ,90.72% respectively with tartaric acid of 25 g/L for reaction 10 min. The leaching rates were increased by 14.42 and 5.31 percentage points compared With without tar- taric acid adding. （3）The stability of Sb3＋, Cu2＋ ion and the leaching rate of antimony and copper were also affected by filtrate pH. The leaching rate of antimony and copper increased from 78.79% ,90.72% to 86.07%：91. 58% respectively when filtrate pH decreased from 7.0 to 1.5. Therefore ,the leaching rate of antimony and copper were improved by.~taftaric acid adding in oxidizing acid leaching process as the complexing agent or controlling filtrate pH to inhibithydrolysis of Cu2＋ and Sb3＋ ions.

关 键 词：氧化酸浸 酒石酸络合 原料 锑 铜 

分 类 号：TF09[冶金工程—冶金物理化学] TD983[矿业工程—选矿]