The gold is not currency now, but the gold has been a kind of special article with both goods attribute and monetary attribute at all the time since it became currency. So the gold price mechanism is complex, its price is not determined unilaterally by a certain attributive character, but by two attribute together.
Thiobacillus ferrooxidans has an extraordinary impact on economy and society of industry and environment. In this view, we presented research progress on biologic characteristic, isolation, purification and mobilization, genetics and its application in order to make full use of the widely distributed strain.
In this paper, we use DEA method to evaluate gold mine economic benefits by propriety appraisal indexes, analyzedmostly indexes superabundance of input or lack of output, and offer an effective technical and microeconomic system analyzed tool. Preliminary mine information gives in the paper show that themethod is an effective and reasonable, explains and verifies their practices.
Ore of the Dongan gold deposit is electrum ore that is strong silicification and poor sulphur, its mineral composition is simple. Being low content, metallic mineral pyrite accounts for 2.8%. The main metallic mineral is pyrite, minority is arsenopyrite, sphalerite, galena etc.. Quartz is Main gangue mineral, next is feldspar, kaolinite, chlorite, sericite, etc.. Most of gold mineral occurrence as intergranular gold, others are inclusions. The size of gold is mid and fine micrinite(84.6% gold is finem icrinite) predom inantly.
SiPing mountain gold mine occurred in silicic belt that formed by hot spring of SiPing Mountain Formation in upper of Cretaceous. According to the elevation, the deposits can divided into three layers. The top, the middle and the bottom. Ore bed occurred alike layers, similar layers and lentoid. With the gold content in rock is less this deposits is a lower quality and medium-sized gold deposits. And it genetic type belong to a hot sp ring type which relation with volcano. The deposits can get gold from ore by pile-soak technique that is proved with examination.
The XianFeng NorthMounta in gold mine occurred in litmusless and acidic lava of PiKe Mountain Formation in lower of Cretaceous. the ore bed exist in hot liquid breccia which has been strongly silicic and chalcedony belt. The nature gold symbiosis with quartz. In the later of volcano eruptible period, the hot liquid which carries gold tomove to the ground along the volcano channels, faultage and cranny structures. the gold that carried by the fluid is enrich to deposits where around the volcanic crater.
The global positioning system has three-dimension while carring on to navigate omni-directionally, Through is it indicate GPS have all-weathe, automation, high benefit, high accuracy wait until the characteristic to use, can at all satisfied with the precision request that open-air gedogy work.
The experimental reseach of gold leaching of hot-press acid leaching residues by ammmoniacal cyanide process and the effects of various operation condition on gold extraction have been investigated in this paper.The extraction of Au、Ag is 98.3%、82.7% respectively under conditions that granularity of concentration of mine slurry is 20%, the NaCN and NH4HCO3 is 8kg/t and 75kg/t respectively, and ammoniacal cyanide treatment time as long as 16h.
The oil-supplying unit by frequency conversion and constant pressure is generally used in mineral processing equipments in gold mine, such as ballmills, hydrocone crushers. Consisting of a converter(PID contained), a switch componen, tapressure signal converting and conveying device and a standard cabinet, this unit can replace the traditional one. Characterized by its steady pressure, less maintenance and energy saving, this unit is a new energy saving product popularized by the nation.
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