Integrated Approach to Sag Utilization at the Balkhash Copper Smelter
O. E. Gorlova1,2, E. V. Kolodezhnaya2, I. V. Shadrunova2, O. M. Sinyanskaya3, M. S. Garkavi4
1Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia
2Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources-IPKON, Russian Academy of Sciences, Moscow, Russia
3Cytec Solvay Group Mineral Processing
4Ural-Omega, Magnitogorsk, Russia
Keywords: Copper smelting slag, impact crushing, milling, flotation, flotation time, process flowchart, copper concentrate, ammonium sulfate, flotation tailings, foam high-pressure steam cured concrete, raw stock composition
Abstract
The current situation in copper smelting slag processing is discussed. The common method of slag processing by flotation produces secondary waste. The authors describe flotation of converter slag of the Balkhash Copper Smelter, with high mass fractions of copper, zinc, lead, iron and silver. In flotation with fractional froth removing, the times of intercycle, rougher and recleaner operations, consumptions of agents, as well as stages of milling and flotation were determined. The introduction of ammonium sulfate in slag milling improved the copper concentrate quality by means of the increase in the copper content in the concentrate from 29.54 to 37.32%. The developed flowchart produced a copper concentrate with the copper mass fraction of 32.4.8% and silver content of 204.74 g/t, and tailings with the copper mass fraction of 0.65%. It is found that tailings of the copper smelting slag processing can be used as a silicic component in manufacture of foam high-pressure steam cured concrete, which can reduce secondary waste and substantially elevate the resource value of copper smelting slag and its utilization prospects.
|
