Development of copper recovery process from flotation tailings by a combined method of high-pressure leaching solvent extraction

JOURNAL OF HAZARDOUS MATERIALS

卷:352

Article

Han, Baisui¹  Altansukh, Batnasan²  Haga, Kazutoshi³  Stevanovic, Zoran⁴  Jonovic, Radojka⁴  Avramovic, Ljiljana⁴  Urosevic, Daniela⁴  Takasaki, Yasushi²  Masuda, Nobuyuki²  Ishiyama, Daizo²  Shibayama, Atsushi² 

[1] Akita Univ, Grad Sch Engn & Resource Sci, 1-1 Tegata Gakuen Machi, Akita 0108502, Japan

[2] Akita Univ, Grad Sch Int Resource Sci, 1-1 Tegata Gakuen Machi, Akita 0108502, Japan

[3] Akita Univ, Grad Sch Engn Sci, 1-1 Tegata Gakuen Machi, Akita 0108502, Japan

[4] Min & Met Inst Bor, Zeleni Bulevar 35, Bor 19210, Serbia

关键词: Flotation tailings;    Copper recovery;    High-pressure leaching;    Solvent extraction;    Iron removal;   

DOI  :  10.1016/j.jhazmat.2018.03.014

来源: Elsevier

【 摘 要 】

Sulfide copper mineral, typically Chalcopyrite (CuFeS2), is one of the most common minerals for producing metallic copper via the pyrometallurgical process. Generally, flotation tailings are produced as a byproduct of flotation and still consist of un-recovered copper. In addition, it is expected that more tailings will be produced in the coming years due to the increased exploration of low-grade copper ores. Therefore, this research aims to develop a copper recovery process from flotation tailings using high-pressure leaching (HPL) followed by solvent extraction. Over 94.4% copper was dissolved from the sample (CuFeS2 as main copper mineral) by HPL in a H2O media in the presence of pyrite, whereas the iron was co-dissolved with copper according to an equation given as C-Cu = 38.40 x C-Fe. To avoid co-dissolved iron giving a negative effect on the subsequent process of electrowinning, solvent extraction was conducted on the pregnant leach solution for improving copper concentration. The result showed that 91.3% copper was recovered in a stripped solution and 98.6% iron was removed under the optimal extraction conditions. As a result, 86.2% of copper was recovered from the concentrate of flotation tailings by a proposed HPL-solvent extraction process.

【 授权许可】

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