Effect of Pretreatment on Leaching Primary Copper Sulfide in Acid-Chloride Media

被引：34

作者：

Cerda, Cecilia P. ^{[1
]}

Taboada, Maria E. ^{[1
,2
]}

Jamett, Nathalie E. ^{[1
]}

Ghorbani, Yousef ^{[3
]}

Hernandez, Pia C. ^{[1
]}

机构：

[1] Univ Antofagasta, Dept Ingn Quim & Proc Minerales, Avda Angamos 601, Antofagasta 1270300, Chile

[2] Ctr Invest Cientifico Tecnol Mineria CICITEM, Sucre 220,Of 604, Antofagasta 1270300, Chile

[3] Kingston Univ, Fac Sci Engn & Comp, Sch Nat & Built Environm, London KT1 2EE, England

来源：

MINERALS | 2018年 / 8卷 / 01期

关键词：

chalcopyrite; chloride; leaching; pretreatment; seawater; CHALCOPYRITE HYDROMETALLURGY; AGGLOMERATION; ORE;

D O I：

10.3390/min8010001

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The aim of this study was to improve the dissolution of copper sulfide ore composed mainly of chalcopyrite (1.21 wt %) and bornite (0.54 wt %) using a pretreatment before leaching. The effect of the pretreatment on copper sulfide dissolution was investigated using different types of leaching. Three sets of experimental tests were performed (flask, reactor and mini-column). Using experimental design, three operational variables in the ore pretreatment were evaluated: chloride concentration (20, 50 and 90 kg/t), repose time (7, 20 and 40 days) and repose temperature (20 and 50 degrees C). A maximum of 93% copper dissolution was obtained when the ore was treated with 90 kg Cl-/t ore, 40 d of repose time and 50 degrees C in flask leaching. Without any ore pretreatment, 53% copper dissolution was achieved. Using reactor leaching, an 85% copper dissolution was obtained using pretreatment stage. Without this pretreatment, only 55% copper dissolution was obtained. The final test, which involved leaching a pretreated ore in a mini-column at room temperature, yielded 49% copper dissolution. The data showed that repose time and temperature were the most important variables affecting copper extraction in the pretreatment stage. This study indicates that pretreatment has a positive effect on copper dissolution from primary copper sulfide ore in an acid-chloride medium. It also provides a feasible alternative for treating primary copper sulfide ores at the industrial level.

引用

页数：14

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