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Extraction of molybdenum and nickel from roasted Ni-Mo ore by hydrochloric acid leaching, sulphation roasting and water leaching

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Transactions of Nonferrous Metals Society of China 2017年第1期27卷 220-226页

作者：羡鹏飞周升帆王明玉王学文陈边防中南大学冶金与环境学院长沙410083

To extract molybdenum and nickel from the roasted Ni-Mo ore, a process of hydrochloric acid leaching, sulphation roasting and water leaching was investigated. The results showed that this process could get a high leaching rate of Mo and Ni. Under the optimum conditions of hydrochloric acid leaching （roasted Ni-Mo ore leached with 0.219 mL/g hydrochloric acid addition at 65 ℃ for 30 min with a L/S ratio of 3 mL/g）, sulphation roasting （51.9% sulfiaric acid addition, roasting temperature 240 ℃ for 1 h）, followed by leaching with the first stage hydrochloric acid leaching solution at 95 ℃ for 2 h, the leaching rates of Mo and Ni reached 95.8% and 91.3%, respectively.

关键词： molybdenum nickel Ni-Mo ore hydrochloric acid leaching sulphation roasting water leaching

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Effects of mechanical activation and oxidation-reduction on hydrochloric acid leaching of Panxi ilmenite concentration

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Transactions of Nonferrous Metals Society of China 2011年第6期21卷 1414-1421页

作者：谭平胡慧萍张黎湖南机电职业技术学院生物化工系长沙410151 中南大学化学化工学院长沙410083

The effects of oxidation-reduction treatment and mechanical activation on the hydrochloric acid leaching performance of Panxi ilmenite concentration were *** results show that both of oxidation-reduction treatment and mechanical activation significantly accelerate the extraction of Fe,Ca and Mg from Panxi ilmenite concentration;however,the CaO and MgO contents of the calcined residues obtained from oxidized-reduced ilmenite concentration are higher than the standard values required by chlorination *** Ca and Mg in oxidized-reduced ilmenite concentration can be leached much faster after mechanical activation,yielding a synthetic rutile which meets the requirements of chlorination process containing 90.50% TiO2 and 1.37% total iron as well as combined CaO and MgO of 1.00%.The optimum oxidation and reduction conditions are as follows：oxidization at 900 ℃ in the presence of oxygen for 15 min and reduction at 750 ℃ by hydrogen for 30 min.

关键词： ilmenite concentration mechanical activation oxidation reduction hydrochloric acid leaching

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leaching of iron concentrate separated from kiln slag in zinc hydrometallurgy with hydrochloric acid and its mechanism

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Transactions of Nonferrous Metals Society of China 2017年第4期27卷 901-907页

作者： Hong-jun WANG Zhi-yong LIU Zhi-hong LIU Yu-hu LI Si-wei LI Wen-Hai ZHANG Qi-hou LI School of Metallurgy and Environment Central South University Changsha 410083 China Institute of Metallurgy China Nerin Engineering Co. Ltd. Nanchang 330031 China

It is taken as a novel prospective process to treat iron concentrate from hydrometallurgical zinc kiln slag forcomprehensive utilization of valuable metals by a hydrochloric acid leaching-spray pyrolysis *** leaching mechanism ofdifferent valuable metals was *** results revealed that the leaching rates of Ag,Pb,Cu,Fe,As and Zn were99.91%,99.25%,95.12%,90.15%,87.58%and58.15%,respectively with6mol/L HCl and L/S ratio of10:1at60°C *** actionof SiO2in leaching solution was also *** results showed that the precipitation and settlement of SiO2(amorphous)adsorbedpart of metal ions in solution,which greatly inhibited the leaching of Cu,Fe,As and Zn,so it is crucial to control the precipitation ofamorphous SiO2.

关键词： kiln slag iron concentrate hydrochloric acid leaching amorphous silica

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