Open AccessResearch on the Process of Sulphatizing Roasting of Copper Slag Flotation Tailings Using Iron Sulphates
Author(s) -
Pavel Grudinsky,
Ekaterina Podjelnikova,
V. G. Dyubanov
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/459/4/042004
Subject(s) - roasting , tailings , copper , copper extraction techniques , leaching (pedology) , sulfuric acid , metallurgy , zinc , chemistry , smelting , materials science , environmental science , soil water , soil science
The paper presents a study of sulphatizing roasting using iron (II) and (III) sulphates of copper slag flotation tailings of JSC “SUMZ” (Sredneuralsk Copper Smelter) with high content of silica. Temperature ranges of sulphatizing roasting and necessary amounts of Fe 2 (SO 4 ) 3 and FeSO 4 for sulphation of zinc and copper were calculated by thermodynamic software HSC Chemistry 9.9. The laboratory experiments have shown that the degree of extraction of zinc and copper from the roasted samples during water leaching is in the range of 60-79%, while the degree of dissolution of iron is less than 1.1%. The obtained results are better or comparable to the results of direct leaching of copper tailings by strong sulfuric acid.