Processing gold-bearing antimony sulfide mechanoactivated concentrate

Abstract

Introduction. The solution of important strategic objectives of the Republic of Tajikistan depends on such industries as chemical, mining, processing, and metallurgical. Their smooth functioning is provided by a developed energy and transport industry. Comprehensive mineral processing of abundant minerals located on the territory of the Republic of Tajikistan contributes to socioeconomic problems solution and to the development of new production facilities and employment, the transition from the role of a primary producer and middle-stage manufacturer to an end product producer. Methods of research. The expediency of separating antimony and precious metals before cyaniding is obvious. It can be achieved by pyrometallurgy or beneficiation methods. Distillate roasting allows to amply remove antimony from complex ores relatively poor in this metal. However, when processing raw materials rich in antimony, the risk of accretion development in furnaces creates difficulties. At a high temperature (1000–1100 °C), a large amount of gold can combine with oxides and become an oxide. Antimony can be removed by roasting with chlorination. Additional chlorinating reagent makes it possible to increase gold recovery during the subsequent cyanidation of the calcine from 75 to 95–98% compared to conventional oxidative roasting. Results and analysis. This article is the result of a series of experiments and renovations for the technologies of processing gold-bearing antimony sulfide concentrate into the final product. An effective method has been developed for chloridizing roasting of mechanoactivated precious metal containing antimony-gold concentrate with sodium chloride. The optimal roasting mode has been determined, which provides a high yield of antimony and gold compounds, which are technologically easy to process.