Utilization of high-gradient magnetic separation-secondary grinding-leaching to improve the copper recovery from refractory copper oxide ores

被引：36

作者：

Bai, Xu ^{[1
,2
]}

Wen, Shuming ^{[1
,2
]}

Feng, Qicheng ^{[1
,2
]}

Liu, Jian ^{[1
,2
]}

Lin, Yilin ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China

[2] Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Yunnan, Peoples R China

来源：

MINERALS ENGINEERING | 2019年 / 136卷

基金：

中国博士后科学基金;

关键词：

Copper-oxide ore; Combined copper-oxide; Chrysocolla; Magnetic separation; Secondary grinding; Leaching; FLOTATION; IONS;

D O I：

10.1016/j.mineng.2019.03.009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Copper-oxide raw ore has a complex composition and cannot be processed effectively by conventional, single-stage sorting methods. Based on the characteristics of copper-oxide ore, a new combined grinding-flotation-high-gradient magnetic separation-secondary grinding-leaching process has been proposed to recover copper. Test results show that the new process is very effective. Sodium sulfide was used as a vulcanizing agent in the flotation process, and butyl xanthate was used as a collector to obtain a qualified copper concentrate with a copper grade of 29.37% and a recovery rate of 32.22%. The flotation tailings were subjected to high-gradient magnetic separation to obtain magnetic concentrates and magnetic tailings, and copper was recovered by leaching from the magnetic concentrates and tailings. After secondary grinding of the magnetic concentrates, the leaching rates of copper from the magnetic concentrates and magnetic tailings were 26.85% and 26.95%, respectively. The total copper recovery was 86.02%. The new process introduces high-gradient magnetic separation, enriches refractory chrysocolla, leaches chrysocolla at 65 degrees C, leaches malachite from the magnetic tailings at 40 degrees C, and saves heating costs. Secondary grinding can reduce the leaching temperature, shorten the leaching time, and achieve a low energy consumption and effective extraction of refractory copper-oxide ore.

引用

页码：77 / 80

页数：4

共 7 条

[1]

BAI X, 2018, MINERALS-BASEL, V8, DOI DOI 10.3390/MIN8040165

[2] A review of the effects of the grinding environment on the flotation of copper sulphides [J].