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International Journal of Minerals,Metallurgy and Materials 2018年第10期25卷 1132-1139页

作者： Shuang-hua Zhang Ya-jie Zheng Pan Cao Chao-hui Li Shen-zhi Lai Xing-jun Wang School of Metallurgy and Environment Central South University western region gold yili co. Ltd

To provide a theoretical basis for a suitable process to extract gold from refractory gold co.centrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical co.position, X-ray diffraction, scanning electron microsco.y-energy spectrum, and mineral dissociation analysis. The results showed that the acid leaching residue co.tained Au 68.22 g/t, Ag 92.71 g/t, Fe 0.44%, As 0.10%, and S 0.55%. gold and silver minerals existed as native gold, argentite, and proustite. Quartz, the main gangue mineral, acco.nted for 78.33 wt/%. The dissociation degree analysis showed that the proportions of monomer and exposed gold in acid leaching residue were 96.66 wt%. The cyanidation results showed that the cyanide gold leaching rate of acid leaching residues was close to 100 wt%. However, the maximum cyanide gold leaching rate of gold calcine was only 85.31 wt%. This suggests that acid leaching can increase the gold dissolution rate in the cyanide process.

关键词： acid leaching residue roasting process mineralogy precious metals occurrence states

Differences of cyanide leaching between calcine and dust from refractory gold co.centrates

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Transactions of Nonferrous Metals Society of China 2020年第7期30卷 1964-1979页

作者： Pan CAO Shang-hua ZHANG Ya-jie ZHENG Han-bing HE Shen-zhi LAI Xing-jun WANG Bing TAN School of Metallurgy and Environment Central South UniversityChangsha 410083China western region gold yili co. Ltd.Yining 835100China

Differences of cyanide leaching between the calcine and the dust from a refractory gold co.centrate were investigated by co.parative method. Results showed that gold leaching efficiencies of the calcine and the dust were 85.31% and 54.30%, respectively, with direct cyanidation. co.tents and existing forms of arsenic and carbon were the main reasons for those differences. The maximum gold leaching efficiencies of the calcine and the dust were 87.70% and 58.60%, respectively, with cyanidation after NaOH pre-leaching. Harmful elements removal, gold loss in NaOH pre-leaching and iron oxides hindrance co.etermined gold leaching efficiencies of the calcine and the dust. After H2SO4 pre-leaching, the maximum gold leaching efficiencies of the calcine and the dust achieved 94.96% and 80.40%, respectively. The effect of carbonaceous matter was the main reason for differences for leaching efficiencies of the calcine and the dust. Based on those differences, two proper gold extraction processes were put forward, and gold leaching efficiencies for the calcine and the dust achieved 94.91% and 91.90%, respectively.

关键词： refractory gold co.centrate calcine dust cyanidation carbonaceous matter

A New Chronological Report of the Hongshi Breccia-Host gold Deposit in the western Qinling region,China

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 1149-1150页

作者： WANG Chenguang CAO Yi SUN Tao LI Weigang ZENG Hao School of Earth Science and Resources China University of Geosciences Zhaojin Mining Industry co.Ltd The First Research Institute of Geological Prospecting Gansu Geological Prospecting Bureau No.6 gold Geological Party of CAPF

Objective The western Qinling belongs to the western part of the Qinling-Dabie-Sulu orogen between the North China Block and South China Block. Multiple orogenic events might be responsible for different types of gold mineralization, making the western Qinling gold region one of the most important gold metallogenic belts in China. This region has demonstrated a total gold resource of 〉500 t and more than ten gold deposits with gold resource of 〉20 t. Almost all gold deposits in the western Qinling gold region can be classified into two distinct genetic types as orogenic （such as the Shuangwang,

关键词： of is as gold A New Chronological Report of the Hongshi Breccia-Host gold Deposit in the western Qinling region,China in

A new type of Mo-bearing quartz vein by acid leaching:evidence from Dahu-Qinnan Mine,northern belt of the Xiaoqinling gold province,central China

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Global Geology 2020年第4期23卷 214-224页

作者： ZHANG Yuanhou MAO Jingwen PIRAJNO Franco.LI Zongyan QIAO Cuijie ZHANG Xiaomin HE Yue ZHANG Shuaimin co.lege of Earth Sciences Jilin UniversityChangchun 130061China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 130037China Geological Survey of western Australia Perth WA6004Australia Jinyuan Mining Industry co. LtdLingbao472500 HenanChina

Dahu-Qinnan molybdenum deposit,located in the northern part of the Xiaoqinling gold province,belongs to the Xiaoqinling-Waifangshan sub-zone of the eastern Qinling Mo-W metallogenic belt,central *** mineralization is associated with Au-bearing quartz *** paper is based on field observations and PIMA analytical data on the occurrences,and details textures and alteration patterns of Mo-bearing quartz veins in Dahu-Qinnan *** Mo-bearing quartz veins exhibit friable with cream co.ored,vuggy,infilling texture and brecciated *** breccia clasts within Mo-bearing quartz veins are dominated by gneissic rocks of the Taihua Supergroup,and Mesozoic porphyritic granite dyke with stockwork and disseminated molybdenite *** breccias are replaced by clay *** associated with molybdenite-bearing quartz veins is characterized by K-feldspar(only in the breccias),sericite,sillicification(residual silica),kaolinite,smectite and *** with other sulfide minerals infills fissures and pore spaces in the quartz *** the results of above,and acco.ding to the observed geological events in the area and taking into acco.nt the geological setting,molybdenite-bearing quartz veins are likely to have been affected by late acid *** precursor porphyry Mo ore,associated with porphyry granite dyke formed probably at ca.245--211 Ma during the co.tinent-co.tinenl co.lision of Qinling orogeny.

关键词： Mo-bearing quartz vein porphyry molybdenum body acid leaching Mesozoic Dahu-Qinnan