| Method of processing molybdenite concentrates involves oxidative roasting in the presence of CaO | |
| 2024-05-14 | |
| 专利权人 | UNIV MISIS NAT SCI & TECHNOLOGY (UMNS-C) |
| 申请日期 | 2024-05-14 |
| 专利号 | RU2830802-C1 |
| 成果简介 | NOVELTY - Invention relates to metallurgy of refractory rare metals, in particular to extraction of molybdenum and rhenium from sulphide concentrates. Method of processing molybdenite concentrates involves oxidative roasting in the presence of CaO and two-stage leaching of the cinder. Annealing of the concentrate is carried out at temperature of 550±10 °C for 1-2 hours with weight ratio of CaO to molybdenite concentrate 1:1. At the first stage, the cinder is leached with water without heating at L:S = 5:1 for at least 0.5 h, and at the second stage – with a solution of a mixture of sulphuric and acetic acids at concentration of H2SO4 0.75-1.0 mol/l, CH3COOH 0.5-1.5 mol/l and their total concentration of not less than 1.5 mol/l, temperature 70±2 °C, L:S = 10:1 for 0.5 hours. USE - Metallurgy. ADVANTAGE - Method provides increased complexity of use of raw materials, energy and resource saving and environmental safety during processing of molybdenite concentrates due to reduction of temperature of the roasting process for complete binding of sulphur to non-volatile compounds to 550±10 °C, elimination of reagent costs for conversion of the main component of the cinder – CaSO4 into less soluble calcium compounds and, as a result, reduction of salt effluents, selective extraction of rhenium and molybdenum into leaching solutions is not less than 88 and 96% respectively. 1 cl, 5 ex |
| IPC 分类号 | C01G-047/00 ; C22B-001/04 ; C22B-003/04 ; C22B-034/34 |
| 国家 | 俄罗斯 |
| 专业领域 | 材料科学 |
| 语种 | 英语 |
| 成果类型 | 专利 |
| 文献类型 | 科技成果 |
| 条目标识符 | http://119.78.100.226:8889/handle/3KE4DYBR/16779 |
| 专题 | 中国科学院新疆生态与地理研究所 |
| 作者单位 | UNIV MISIS NAT SCI & TECHNOLOGY (UMNS-C) |
| 推荐引用方式 GB/T 7714 | BOGATYREVA E V,MEREDALYEV T,KOZLOV A S,et al. Method of processing molybdenite concentrates involves oxidative roasting in the presence of CaO. RU2830802-C1[P]. 2024. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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