In the late 1970 s, China portable gold wash plant began to low grade gold bearing oxidized gold ore heap leaching production technology research, in liaoning dandong wuhushan mine after the small-scale production experiment of silver lake, hole slope successively in henan spirit, yunnan sumie, hebei worship ceremony, chifeng in Inner Mongolia and other regions of the mines to application and satisfactory economic results, for the development and utilization of low grade gold bearing oxidized ore has paved the way. Because of its simple process for gold heap leaching of gold, easy operation, less investment, good efficiency, the horse is fast, so gold heap leaching gold technology develops very fast. Attaches great importance to the State Council and the gold corporation, gold heap leaching process and new development, gold heap leaching has the new growth, size and number of the production technology is also constantly improve and improve. Granulating technology and the application of active carbon adsorption column and the development of gold charcoal desorption process of electrodeposition, more gold heap leaching technology popularization and application of gold added new vitality. After entering the 1960 s, in order to adapt to the development of national economy, to develop the mineral production of gold, has been adopted in some mines intermittent mechanical agitation cyanidation process and continuous agitation cyanidation gold shaking table leaching gold gold process instead of infiltration cyanidation of gold. In 1967, the first in shandong zhaoyuan gold lingshan and exquisite choose gold factory implements continuous mechanical agitation cyanidation process gold, cyanidation leaching gold by 70% to 93.23%, from now on continuous mechanical agitation cyanidation process in national each big gold gold quickly promoted. Factory in 1970 meiyukou mine, wulong gold cyanide plant have been completed and put into operation in 1977, since then, the domestic has a batch of mechanical stirring cyanide factory, the production of the cyanidation leaching gold process has entered a new stage of development.
Due to the growing development of the cyanidation of gold, and the enterprise to improve economic efficiency, reducing loss of concentrate transport, so many take on-site processing (of course, due to problems such as the contradiction between the mineral intergrowth and valuation, forcing mines in situ disposal) prompted flotation technology has larger development, occupies an important position in the gold production. There are usually two preferential flotation and mixed flotation process. Because the process modification and reagent adding system have new progress, flotation recovery rate is improved obviously. According to the national more than 40 gold factory, flotation index survey results show that the sulphide ore flotation recovery rate is 90%, the minority is as high as 95% ~ 97%; Oxidized magnetic separator machine ore recovery was 75%; Individual reached 80% ~ 85%. Production practice, the flotation process of renovating and many scientific research achievements, the effect is obvious. Floating stage grinding process, the heavy - float joint process, etc., is the main trend of development of flotation technology in China. Use heavy - floating joint process, such as xiangxi gold mine of stage grinding stage, don't get a good indicators, improve the recovery of over 6%; Jiaojia gold mine, wulong gold mine, valley, east into gold also have certain effect.