COMPARISON OF CHEMICAL AND BIOLOGICAL LEACHING OF SULFIDE TAILINGS

被引：9

作者：

Aromaa, Jari ^{[1
]}

Makinen, Jarno ^{[2
]}

Vepsalainen, Henri ^{[1
]}

Kaartinen, Tommi ^{[2
]}

Wahlstrom, Margareta ^{[2
]}

Forsen, Olof ^{[1
]}

机构：

[1] Aalto Univ, Dept Mat Sci, FI-00076 Espoo, Finland

[2] VTT, FI-02044 Espoo, Finland

来源：

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2013年 / 49卷 / 02期

关键词：

sulfide tailings; chemical leaching; bioleaching; selectivity; RECOVERY; COPPER;

D O I：

10.5277/ppmp130220

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sulphidic tailings from Finnish Hitura nickel mine and Pyhasalmi multi-metal mine were leached using sulphuric acid and bioleached. The aim was to recover minor amounts of valuable Cu, Ni, Zn and Mn. Both tailings consisted mainly of iron and magnesium-containing minerals and acid neutralizing minerals. The solution after chemical leaching tests contained mostly iron and magnesium, in Hitura up to 11 g/dm(3) Fe and 38 g/dm(3) Mg while in Pyhasalmi 8-9 g/dm(3) Fe and 4 g/dm(3) Mg. Amount of these metals was 20-100-fold larger than amount of valuable metals, which were typically 100-300 mg/dm(3). Problems in chemical leaching were high consumption of acid and poor selectivity. Bioleaching using iron and sulphur oxidizing bacteria was more selective towards the valuable metals. Both in leaching and bioleaching the high concentration of iron and magnesium in solution will make metals recovery challenging.

引用

页码：607 / 620

页数：14

共 7 条

[1] Investigation of the possibility of copper recovery from the flotation tailings by acid leaching [J].