mining process using mercury

Should cyanide still be used in modern-day mining ... Other chemicals, such as mercury which is commonly used in artisan mining, is considered to be even more harmful than cyanide. In June, Australia-based CSIRO announced that its patented cyanide-free thiosulphate process, which the research organisation had been developing for 20 years, was adding value to Barrick Gold's Goldstrike plant in ... Mill leaching: a viable substitute for mercury ... The mill-leaching process is not a panacea to solve the use of mercury in artisanal mining. However, this procedure requires a minimum knowledge of chemistry and requires a small investment in equipment and reagents (e.g. cyanide, lime, hypochlorite, etc.). Uranium: How is it Mined? - New Mexico Institute of Mining ... Open pit mining, also known as strip mining, is the removal of surficial soils and uneconomic rock to get at the ore below. Ore grades are normally less than 0.5%. This is type of mining is only possible if the uranium ore is near the surface (normally less than 400 ft).    Read More