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Based on X-ray diffraction, optical microscopy and scanning electron microscopy analysis of the Dachang gold ore, it is showed that the sulfide of ore is the main carrier minerals of gold. A majority of gold is embedded in pyrite and tetrahedrite as the form of inclusion and a small amount intergrowth with pyrite and gangue mineral, occasionally the presence is in form of monomer natural gold. The main factors which influence the recovery rate are sulfide mineral particle size, and the fine grained sulfide is beneficial for the dissociation and flotation of gold bearing minerals. The monomer dissociation degree of gold bearing minerals can reach 91.3% , when the grinding fineness is less than 0. 074 mm and grain level accounts as 80%. It is not conducive to the flotation of sulfide if the grinding fineness is low or high. It is difficult to completely dissociate the monomer if there is a small amount of pyrite and arsenopyrite in the ore. Therefore, before leaching the gold, it must conduct pretreatment to reach the ideal recovery rate of the gold, like roasting oxidation, pressure oxidation and biological oxidation. The fine microscopic gold has little influence on the gold recovery rate. 相似文献
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国土资源部找矿突破战略行动公布的首批整装勘查区和找矿重点区带中,我省祁漫塔格、沱沱河、曲麻莱县大场、杂多县然者涌一莫海拉亨等四片找矿重点区榜上有名,这意味着我省将从资金、技术、政策等方面得到国家的更大支持。同时,在国土资源部公布的我国19个重点成矿区带中,青海省东昆仑成矿带、祁连成矿带、西南三江成矿带名列其中。 相似文献
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青海扎家同哪金矿勘查区位于青海省曲麻莱县麻多乡境内。在地质调查基础上,通过区域地球化学1∶20万水系沉积物地球化学测量、1∶5万水系沉积物地球化学测量等区域地球化学扫面工作,成果显示Au、As、Sb、Hg、Cu、Zn、Co、Ni、Ti、Li、SiO2、Fe2O3、Na2O等元素(或氧化物)丰度较高,尤其Au、As、Sb元素在本测区呈现高背景或局部异常,通过对扎家同哪等局部异常的查证,已发现金矿体,区内还有多个局部异常与之类似,显示出矿致异常的特征;此外,引入深穿透地球化学勘查技术-地电化学测量,并在上述基础上,建立元素立体展布特征,分析区域找矿潜力。 相似文献
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