The process of liquid phase reduction of calcine obtained from gold-containing mattes
DOI:
https://doi.org/10.31643/2018/6445.5Keywords:
gold, silver, roasting, collector sulphide gold-containing matte, slag, metallized phase, gold-containing ores.Abstract
The results of researches on the direct restoring of refractory ores of gold and pyrometallurgy enrichment of the collector mattes of gold have been introduced in the article. The tests for gold containing calcine restoring at the temperature range of 1350-1450 ° C were performed in the laboratory. At the results of testing of temperature effect on the degree of gold containing calcine restoring it became known the process of restoring is much overall at the temperatures of 1400-1450 ° C. At this, the yield of a metalized phase is at 13-15% range, and iron content is 71% on the average. The effect of coke consumption on the rate of calcine restoring under the effective temperature of 1400 ° C has been studied. The coke consumption on the calcine restoring rate made by experiment have shown the possibility of regular control of metals content in the metalized alloy by changing its content in the feed stock. The basic parameters of liquid phase gold containing calcine restoring with obtaining copper-ferrous alloy and mattes enriched by gold and silver have been determined. The research results can be applied for the development and creation of the new methods of gold and other metals extraction from a collector sulphide mattes-CPS (contracted pyrometallurgical selection) process consisting of direct melting of ledge ores persistent to opening and gold concentrates. The roasting of collector gold containing sulphide mattes with further separating of gold-copper-iron alloys will enable to create a complete pyrometallurgy technology of processing of refractory ledge gold ores escaping the enrichment processes and cyanidation, with 98-99% of gold extraction. In case of providing a high-scale of precious metals extraction in finale products and the positive technical and economical characteristics of recovery melting the transfer of collector gold contained metal alloys for the copper mattes converting of copper plants is possible.
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