Process mineralogy and comprehensive recovery of Xiling Gold deposit
The Xiling Gold Mine is a world-class giant monolithic gold deposit with an average gold content of 3.81 g/t,offering significant mining value.Utilizing techniques such as optical microscopy,scanning electron microscopy,and the mineral automatic analysis instrument(AMICS),the process mineralogical characteristics of the ore from the Xiling Gold Mine were analyzed,including an examination of mineral composition,dissemination grade,existence state of gold and its carrier minerals,and other pertinent features.The results indicate that gold in the ore primarily exists in the form of native gold and electrum.The majority of metal minerals are pyrite,accompanied by small quantities of sphalerite,chalcopyrite,galena,and arsenopyrite.Non-metallic minerals are predominantly quartz followed by muscovite,orthoclase,and potassium feldspar.Gold minerals within the ore mainly occurred in exposed gold form with a dissemination grain size concentrated above 10 μm.There is a close relationship between gold minerals and pyrite regarding their dissemination patterns;pyrite exhibits relatively coarse dissemination grain sizes,and the gold can be easily recovered under appropriate grinding fineness conditions at suitable reagent dosages during processing using full sulfide flotation technology.Based on the results of the process mineralogy analysis,the Xiling gold mine was processed using the full sulfide flotation process.The results of the closed-circuit flow test show that under appropriate grinding fineness and reagent system conditions,the mineral processing indicators of Au 62.77 g/t with an Au recovery rate reaching 98.89％can be achived.
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