China's gold heap leaching sodium cyanide price method is used to produce gold annual output reached more than two thousand (only gold heap leaching of gold production in henan province is 1.3 two thousand), but compared with developed countries, our country gold heap leaching smaller, generally 1 x 103 ~ 3 x 103 t/heap, wan t/heap is less, also there is a big gap on technology, in 1988, shaanxi taibai county double king gold gold heap leaching production, large capacity of gratifying achievements (ore grade is 1.5 g/t). The introduction of foreign advanced technology and equipment to digest (such as highly effective thickener in the United States, the double helix mixing leaching tank, Japan's Mars pumps, belt type filter press, etc.), the gold production in China in the equipment level and technical level has further improved, but also promoted China's gold production equipment to develop in the direction of high efficiency, energy saving, large-scale, automation. In thiourea leaching gold and thiosulfate leaching gold, preoxidation bacterial leaching, pressurized leaching, catalytic resin adsorption, etc. New technology of science research. Changchun gold research institute in 1979 thiourea leaching gold experiment was carried out to be successful, and in 1984 in guangxi build up a day dragon water ore flotation gold concentrate containing 10 ~ 20 t thiourea leaching gold workshop by ministerial appraisal (1987). Although other processes in the experimental research stage and is preparing to plant put into production, to explain China's gold technology has developed to a new level.
Copper anode slime treatment process, obtained the fast development, through gold heap leaching continuous reform and innovation, the traditional method in the manufacturing process more mature and perfect, half wet method combined process and the wet method of new technological process for the trial is successful and has been put into production, smelting technology and equipment level in our country has a larger increase. Such as fire copper removal process improvements, comprehensive recovery of valuable elements, the development of the furnace body and the dust collection system consummation and so on. And electrolytic cell transformation, application of intermediate frequency furnace and so on all make fire smelting technology is gradually mature and perfect, improve the index of technical economy. Because the method smelting process has technical condition is stable, mature technology, high comprehensive utilization degree, strong adaptability of raw materials, processing capacity, low cost advantages, is still Shen Ye, zhuzhou smelter and the smelting smelting methods in general use. Fuchunjiang smelter, smelting plant in wuhan, chongqing smelter has adopted the new technology of wet process has obvious effect. Yunnan smelter, tianjin electrolytic copper factory USES the mineral intergrowth combined process for success and put into production, and achieved remarkable economic benefits. Sulfuric small gold wash plant acid burn test successfully and the application of slag gold process, also for gold production in China and make full use of resources to a new road.