Possibility of recycling gold-bearing refractory clay raw materials

In this paper studied gold-bearing refractory weathering crusts and alluvial sands Angara region. Ore minerals in the studied ores are present in small quantities. The chemical composition of samples indicates of silicate nature the ores, which represent several varieties and consist of unconsolidated detrital material grayish-brown color. For textural and structural characteristics ores are polymineralic and have significant differences in composition, size of fragments of minerals and rocks. Detrital material covered by clay face. One of directions of refining such ores is the processing them with lime-sulfur reagent. Leaching gold of such solution was carried out on the sands of various sizes. Extraction of gold in solution was 97-98 %. The proposed technology has the undoubted advantage over the cyano technology.