矿产综合利用Issue(6)：102-107,6.DOI:10.3969/j.issn.1000-6532.2017.06.022
铜冶炼渣硫酸浸出回收铜试验研究
Study on Recovery of Copper from Copper Smelting Slag by Sulfuric Acid caching
摘要
Abstract
Using sulfuric acid solution as leaching agent,copper smelting slag was treated by atmospheric oxidauon leaching process to recover valuable metals of copper from slag.The effects of leaching temperature,leaching time,sulfuric acid concentration,liquid to solid ratio and the dosage of oxidant(hydrogen peroxide)on the leaching rate of copper were investigated.Experimental results show that without addition of the oxidant to leaching solution most of copper existing as copper oxide can be leached through simple acid-dissolution,copper sulfide is almost insoluble in leaching solution,so the copper leaching rate is very low;while with dosage of the oxidant increased the copper sulfide oxidation leaching,so the copper leaching rate increased obviously.In addition,the leaching rate of copper increases with the increase of leaching temperature,leaching time and liquid to solid ratio.The optimum parameters are as follows:the leaching temperature of 70℃ for 180 min,sulfuric acid concentration at 2mol/L,liquid to solid ratio of 8 ∶ 1,dosage of the oxidant(hydrogen peroxide)for 400mL/kg,the copper leaching rate can be reached of 91.2％.The main minerals are magnetite of the leaching residue by the analyses of XRD and SEM-EDS.The grade of 53.15％ of the iron concentrate can be obtained under the condition of the magnetic field intensity at 2T.关键词
铜冶炼渣/硫酸浸出/氧化浸出Key words
Copper smelting slag/Sulfuric acid leaching/Oxidation leaching分类
矿业与冶金引用本文复制引用
孙建军,黄自力,杨蘖,刘玉飞,焦成鹏..铜冶炼渣硫酸浸出回收铜试验研究[J].矿产综合利用,2017,(6):102-107,6.基金项目
国家自然科学基金(51272188)资助 （51272188）
