Geochemistry
·
2024
·
IF 2.6
Guanghui Li,Zheyi Zhang,Qian Wei,Fen Jiao,Congren Yang,Wei Li,Wenqing Qin
In this study, a new process of pre-flotation decarbonization‑lead flotation‑zinc flotation was proposed to recover valuable metals from a lead‑zinc ore in Guizhou by beneficiation and to determine a reasonable and economic beneficiation process. The results of the study demonstrate that the novel process aids in the flotation of lead and zinc ores in two ways: (1) pre-decarbonization using MIBC (methyl isobutyl carbinol) and kerosene synergistically achieved the lowest loss of lead recovery of 1.94 % and zinc recovery of 1.14 % in the decarbonized product. (2) the successful separation and retrieval of lead and zinc metals were accomplished via a preferential flotation technique, using several combinations of reagents. This procedure yielded a lead recovery rate of 87.64 % and a zinc recovery rate of 94.09 %.
研究领域:
矿物加工工程
·
冶金工程
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DOI
高影响因子
Geochemistry
·
2024
·
IF 2.6
Zhicheng Liu,Fen Jiao,Yanfang Cui,Xiang Lin,Wenqing Qin,Qian Wei
The high content of pyrite in high‑sulfur lead–zinc sulfide resources affects the electrochemical properties and floatability of galena and sphalerite, which results in difficult flotation separation. In this study, the negative effects of a high-alkaline process were weakened by introducing an efficient mixed depressant CaO + Na 2 SO 3 in selective flotation separation of galena from pyrite. Flotation separation tests of real ore samples showed that the mixed depressant was more efficient than single CaO (5000 g/t), and the best process conditions of Pb grade 64.01 % and Pb recovery 88.45 % were obtained. The effects of Na 2 SO 3 on the electrochemical interaction between the two minerals were studied by micro-flotation tests, electrochemical, ion dissolution, UV–Vis measurements, zeta potential measurements, and X-ray photoelectron spectroscopy (XPS) detections. Results indicated that Na 2 SO 3 could weaken the galvanic interaction between galena–pyrite and reduce the Pb 2+ dissolution from the galena surface. Na 2 SO 3 could desorb the collector ethyl xanthate pre-adsorbed on the pyrite surface.
研究领域:
矿物加工工程
·
电化学
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产品关联
DOI
高影响因子
Geochemistry
·
2021
·
IF 2.292
Qian Wei,Liuyang Dong,Wenqing Qin,Fen Jiao,Zhongxu Qi,Cheng Feng,Dayong Sun,Long Wang,Shunyuan Xiao
In this study, a new flotation approach, a low-alkaline and non-desliming process, was introduced for improving lead and zinc recoveries, lowering production cost and reducing environmental pollution . Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc ore regarding two aspects: (1) High alkaline process (pH = 12±) was replaced by low alkaline process (pH = 9±) by using collector WS (a mixture of ethyl thiocarbamate, ammonium dibutyldithiophosphate and dithiophosphate-25) and combined depressant Na 2 S/ZnSO 4 /Na 2 SO 3 for lead sulfide flotation; (2) Non-desliming process was successfully achieved by using collector MA (a mixture of ether amine, hydroxyethyl cellulose and polyacrylic acid) and combined depressant SHP/SS (sodium hexametaphosphate/sodium silicate) for zinc oxide flotation. And 43.37% Pb in the Pb concentrate was recovered, the corresponding Pb grade was 52.73%, total 84.42% Zn was recovered by the flotation of zinc sulfide minerals and zinc oxide minerals . Moreover, the two aspects of the new approach were systematically verified from lab-scale to industrial-scale application. The industrial-scale flotation tests show that Pb recovery in Pb concentrate increased by 1.86% compared with that of original system during industrial-scale tests period, and the Pb recovery increased by 4.09% compared with that of original system before industrial-scale tests period, while the Zn operating recovery in zinc oxide concentrate improved by 19.52%. Moreover, the total reagent cost of the whole new process significantly declined by 3.93 yuan per ton of ore.
研究领域:
矿物加工工程
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环境科学
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DOI
高影响因子
JOM
·
2024
·Vol. 76
·期 12
·7398-7406
·
IF 2.1
Peng Xiaohua,Sun Pu,Lu Zhanqing,Yang Rongjing,Li Xingbin,Wei Chang,Deng Zhigan,Li Minting
In the Lanping lead–zinc mine area, hazardous jarosite residue produced by the jarosite process seriously threatens the remaining capacity of the tailings pond and the local ecological environment. Therefore, the hematite process has been recommended as an alternative to the jarosite process to overcome the challenge of the hazardous jarosite residue. The recommended reaction conditions for the hematite process are: initial pH = 3.0–4.5, reaction temperature = 150°C, oxygen partial pressure = 0.4 MPa, agitation speed = 500 rpm, and reaction time = 3 h. For the zinc leaching solution containing about 19 g/L Fe 2+ , the Fe concentration after iron removal via the hematite process was reduced to 2 g/L, and the corresponding iron removal efficiency reached 89%. The Fe content in the hematite product is higher than 55%, and the Zn loss and S pollution in the hematite products were below 1% and 3%, respectively. According to the China Non-Ferrous Metals Association for group standard (T/CNIA 0147-2022), the hematite products produced in this study reached the third grade and can be sold as steelmaking raw materials. Therefore, iron ions in zinc leaching solution can be resourced through the hematite process so as to avoid the stockpiling of iron removal residue. The challenges posed by the limited storage capacity of the tailings pond and the threat of jarosite residue to the local ecology can thus be perfectly solved.
研究领域:
冶金工程
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环境科学
·
矿物加工工程
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产品关联
DOI
高影响因子
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