Abstract
Technological procedure of slow cooling slag from primary copper production is applied in the purpose of copper recovery in the level of 98.5% to blister. This technological procedure is divided into two phases, first slow cooling of slag on the air for 24 hours, and then accelerated cooling with water for 48 hours. Within the research following methods were used: calculation of nonstationary slag cooling, verification of the calculation using computer simulation of slag cooling in the software package COMSOL Multiphysics and experimental verification of simulation results. After testing of the experimentally gained samples of slowly cooled slag it was found that this technological procedure gives the best results in promoting growth or coagulation of dispersed particles of copper sulfide and copper in the slag, thereby increasing the utilization of the flotation process with a decrease of copper losses through very fine particles.
Highlights
In order to modernize the production process in the company RTB Bor, a new, environmentally friendly, Outotec flesh smelting technology is adopted
The process of copper production from primary raw materials consists of smelting in flash smelting furnace (FSF), converting of matte in Peirce-Smith converters (PSC), anodic and electrolytic refining and production of sulfuric acid from waste gas streams
Processing the slag by the scheme of slow cooling-crushing-grinding-flotation in order to obtain flotation concentrate rich in copper is recommended if there is enough space and where there are conditions for adequate treatment of tailings
Summary
In order to modernize the production process in the company RTB Bor, a new, environmentally friendly, Outotec flesh smelting technology is adopted. Mineral composition and morphology of copper phase in the slag are of importance for the flotation process (only sulfide and metallic particles could be fotated) and are directly dependent on the cooling method.
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