INTEGRATED METHOD FOR PROCESSING GOLD-BEARING ORES AND REJECTED PRODUCTS IN EXTREME NORTH REGIONS Russian patent published in 2001 - IPC

FIELD: gold mining. SUBSTANCE: invention relates to processing low-grade gold-bearing and reject products. Ore is transported, subjected to express analysis involving x-ray-radiometric technique, after which follow x-ray-radiometric great-portion sorting and single-lump separation, centrifugal concentration on Knelson concentrators, and in-vat bacterial and chemical leaching involving heating of solution in winter and autumn-spring periods. Sorting and separation give 5 products with different contents of gold: enriched product, three intermediate products, and nonutilizable waste. Enriched product is processed to recovery gold. The first intermediate product is subjected to one or two centrifugal concentrations and the second one is concentrated one to four times. Tailings of the two processed intermediate products are combined with third intermediate product and subjected to leaching. EFFECT: enabled involvement of poor and out-of-budget ores into processing. 9 cl, 1 dwg