Leaching of a Tailings from Oxy-sulfur Copper Ore with Sulfuric Acid

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Guiming, Shi^1,2 ; Yichao, Zhou^1 ; Changbing, Ye^1

College of Chemistry Biology and Environment, Yuxi Normal University, Yuxi

653100, China^1

School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou

341000, China^2

关键词: Aggregate size;    Comprehensive utilizations;    Conventional flotation;    Immersion liquids;    Leaching rates;    Pulp concentration;    Pulp temperature;    Sulfide copper ore;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/4/042017/pdf
DOI  :  10.1088/1755-1315/199/4/042017

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, mineralogy and leaching comprehensive utilization of tailings from an oxy-sulfide copper ore were studied. Tailings grade was 0.526%, of which copper was primary free copper oxide. Malachite was not completely dissolved although it flake aggregate size was much larger than other minerals. When the tailings were ground again to a fineness of -0.074 mm 93.5%, the copper grade in the tailings could only be reduced to 0.489% after one roughing and two scavenging. It was difficult to effectively recover copper with conventional flotation methods. Under the pulp concentration of 33%, the pulp temperature of 45 °C and 55 °C, sulfuric acid dosage of 160 kg/t, leaching time of 0.5 h, immersion liquid contained copper 2.37 g/L, the leaching rate of 91.34% was obtained with acid leaching, which the copper tailings got effectively recycled.