Abstract
The article deals with the problems of slags processing from copper-smelting production, both current production and those which had been accumulating over many years of enterprises’ activity in heaps (stale). There are data about possible methods of slag processing. It is proposed a technology for the joint processing of stale copper-smelting slags of the Urals and pyrite cinders (waste from the production of sulfuric acid) - smelting with obtain a poor matte, into which copper and precious metals will be transferred. The results of scientific research on matte melting are presented. It is shown that when the ratio in the furnace charge "stale slag: pyrite cinder" at the level of 2.5, the extraction of non-ferrous metals into the matte is at the level of 90%.
Highlights
The main method of copper production is pyrometallurgical technology[1,2,3,4,5,6], which includes operations of smelting sulphide concentrates on matte, converting, fire and electrolytic refining
The article deals with the problems of slags processing from copper-smelting production, both current production and those which had been accumulating over many years of enterprisesactivity in heaps
It is shown that when the ratio in the furnace charge "stale slag: pyrite cinder" at the level of 2.5, the extraction of non-ferrous metals into the matte is at the level of 90%
Summary
The main method of copper production is pyrometallurgical technology[1,2,3,4,5,6], which includes operations of smelting sulphide concentrates on matte, converting, fire and electrolytic refining. According to various estimates the amount of stale copper-smelting slags only in the Ural region is about 100-120 million tons These slag heaps occupy significant areas, but the most important thing is that the average copper content in stale slag is about 1.5-2%, which is higher than the copper content in the currently mined ordinary ores (0.7-1%). This is due to the fact that during the accumulation of slag heaps rich ores were processed, the technologies were imperfect and there were no ways to deplete the slag effectively.
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