Mineralogy of Technological Process at Operating Factory in Olympiada Mine
The gold-ore Olympiada deposit is located within the Yenissei range (Krasnoyarsk Region, Russia). Primary sulphides ores are metasomatic changed rocks, mica-calcite-quartz structure with impurity amphiboles, chlorites, carbon, the rare thin grains of sulfides (up to 3%～5%) and native gold.The structures of ores are fine-grained, prevailing texture of ores interspersed, vein-interspersed,band-interspersed, veinlet.The most important minerals in the deposit are: gold, arsenopyrite, pyrrhotite, antimonite,Sb-sulphosalt, quartz, muscovite, calcite, siderite, titanium minerals, chlorite and minor sulfides like chalcopyrite, galena, sphalerite, etc. A common problem in mineralogical studies applied to mineral processing (concentration, cyanidation, etc.) is the characterization of gold in ores and technological products. This paper discusses the behavior of minerals during technological process at operating factory in Olympiada Mine and gold distribution in the ores and products. For the mineralogical characterization of minerals a combination of analytical techniques was used.Gold is encountered in the primary ores as free grains among rocks, growth with sulfides and nonmetallic minerals, inclusions in sulfides, sulphosalt, and nonmetallic minerals. The gold-sulphide ores of Olympiada deposit can be quite complicated for enrichment. With the purpose to increase the extraction of metal from concentrates by liberating the dispersed gold, forming inclusions in sulfides, there is used technology of biooxidation of flotation concentrates in Olympiada Mine.Gold and the basic ore-forming minerals in the ores feed, sulphidic concentrates, biocakes,tailings of concentrates of flotation and products of hydrometallurgical leaching have been studied in the mineralogical research.During researches it is established that pyrrhotite was completely oxidized while arsenopyrite was oxidized almost completely in the bacterial oxidation process. Pyrite and antimony minerals behave similarly and were oxidized only partially. The main oxyhydroxides in the bacterial oxidation process are goethite, limonite and jarosite.The results of mineralogical researches showed reasons of losses of gold during hydrometallurgical enrichment.
Gold Operating factory Biooxidation Cyanidation Primary ore Intermediate products Concentrates of flotation Biocakes Tailings Gold recovery
V. Sovmen S. Savushkina J. Stragis M. Pavlyuchenko G. Krivomazova
Gold Mining Company Polyus, Krasnoyarsk, Russia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
127-133
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）