Technological research of gold-bearing ore using gravity and flotation methods

Abstract

The paper presents the results of technological research on the extraction of gold by hydrometallurgical methods, as well as the beneficiation of gold ore using the methods of centrifugal concentration of gravity and flotation. Valuable ore components were identified by quantitative chemical analysis; a study of the material composition showed that the main industrially valuable mineral in the ore is gold with a content of up to 1.60 g/t, with accompanying silver - 27.96 g/t. Studies of the granulometric composition showed gold content in different size classes, the maximum gold content was 8.01 g/t in samples of size class -0.071 mm. X-ray fluorescence, X-ray phase chemical, fire assay analyzes for gold and silver content were carried out, and a mineralogical study of the ore sample was carried out. Based on the research results, conclusions were drawn about the properties of the deposit's ore; according to mineralogical analysis, the ore under study belongs to the low-sulfide primary type, gold is found mainly in free form and in intergrowths with minerals, the technological type of ore is easily enriched, finely disseminated. It was established that the studied ore is effectively enriched by gravity and flotation methods; as a result of the gravity-flotation scheme, 96.29% of gold was extracted into enrichment concentrates; with the enrichment scheme using surfactants, 91.31% of gold was extracted into concentrates. The recovery of gold by direct cyanidation from ore crushed to 95% of -0.074 mm class was up to 92.78%. The results obtained indicate that gold in the ore is in forms extractable by cyanide leaching. Studies have been conducted on the use of surfactants in the process of flotation and extraction of gold from raw materials by cyanidation in order to evaluate the effectiveness of the processes.