Gold refining technology introduction外文翻译(英文).doc

外文文献gold refining technology introductiongold ore in the content is extremely low, in order to extract gold, need to will be broken and fine grinding ore and adopt。with the mineral processing or enrichment from ore in advance that gold is isolated. gold ore dressing is used in morere-election and flotation, re-election method in shajin production in an important position, flotation method is rock gold mine。widely use of mineral processing mountain, at present our country about 80% of the rock gold mines use this law to choose gold, choose。ore technology and equipment level is distinctly improved.(a) broken and grindingaccording to the survey, our country choose gold in the jaw crusher for crushing, using standard cone broken. ore machine broken, and finely used the short head type tapered roller machine and broken mine to break mine machine. medium and small choose.gold factory is used mostly for two broken a closed-circuit ore, large choose the three sections of a gold factory closed-circuit broken mine process. in order to improve the dressing production ability, mining equipment potential, broken mine to process, the reform.grinding machine utilization coefficient increase, the major measures taken the little mill is broken, reduce ore into the ground particle size.(b) re-electionre-election in rock gold mine apply more extensive, and more as aided process, in the grinding loop of the recovery. coarse grain of gold, for flotation and cyanide process to create favorable conditions, improve concentration index, improve the total return to gold. the yield, to increase production and reduce the cost is playing a positive role. shandong province about more than 10 pick. gold factory used heavy choose this one process, the average total recovery can be increased 2% 3%, the enterprise economic effectgood profit, according to not complete count, may have millions of dollars a year of the profits. henan, hunan, inner mongolia, etc. provinces (areas) also have good effect, the main equipment is chute, wave bed, jig and short cone. vortex machines etc. from our most gold mine to see, float-heavy joint process (flotation tailings used heavy choose) suitable for.(c) flotationaccording to the survey, 80% of rock in the gold mines flotation method selected gold, the output of the concentrate more. sent to non-ferrous smelter processing. because of leaching gold cyanide process of development and enterprise to improve economic efficiency. good, reduce concentrate transportation loss, in recent years the product structure has experienced a greater change, take more local processing (of course also because of mineral smelting and the contradiction between the problems and valuation, forcing the mine in situ to place richard) prompted the flotation process have larger development, in the gold production occupies an important position in the. usually priority of flotation and mixing floatation two craft. in recent years in the process modification and potions add system .with new progress, flotation recoveries also increased significantly. more than 40 selected according to the national gold factory, flotation work.(d) the choose-leaching gold technology sector1. mix mercury law of leaching goldmix mercury method of leaching gold process is a kind of old mention gold process, easy, and economic, and is suitable for coarse grains. monomer recovery of gold. our country many gold mine still follow the method. along with the development of the gold production and the progress of science and technology, mix mercury law of leaching gold process is also constantly have improved and perfected. due to the environment.the increasingly strict requirements, some mining cancelled mix mercury assignments, as heavy choose, the flotation and cyanide process of leaching cess replaced. in the gold production, mixed mercury method of leaching gold technology still has its important role in the domestic and foreign are should be with a practical example. at present in zhangjiakou, hebei province, liaoning erdaogou, jilin jiapigou, shandong etc many gold incorporated. mine the process application. liaoning erdaogou gold mine was a single flotation process, according to the ore properties instead.2. of leaching gold cyanide process technologycyanide process technology of leaching gold from ore concentrate is modern or extraction of the main method of gold. cyanide process mention.gold technologies include: by roasting-cyanide leaching process, leaching of pulp washing filtering, kau liquid or are the cicc pulp.the extraction and the finished product and so on several basic processes of smelting. chinas gold mines are the two basic existing factory. kind of leaching gold process, one kind is dense continuous against washing machine, with zinc powder replacement precipitation back. the gold of so-called ordinary cyanide process of leaching gold process (ccd method and ccf law), the other is without filter washing, the active carbon adsorption in the pulp are directly from the recovery of gold without filter are carbon plasma process (cip method and cil law).ordinary cyanide process of leaching gold process according to the different materials handled and two .(e) heap leaching process for productiongold resources in china, low grade oxidation of ore has certain proportion, deal with this kind of ore.the routine of leaching gold cyanide process technology not economically viable, and the production process heap leaching, there are economic effect. the vi