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In this study, hydrometallurgical processes involving pressure acid leaching and solvent extraction were developed to aid recovery of indium from zinc slag, which is produced in the imperial smelting process. Four different acid leaching methods were studied, namely atmospheric leaching, atmospheric leaching with KMnO4, roasting-atmospheric leaching, and oxygen pressure leaching in a sulfuric acid medium. Oxygen pressure acid leaching is the most effective method for indium extraction, and 94.1% of indium was leached under the optimum conditions, i.e., 300 g/L H2SO4,oxygen pressure 0.4 MPa, liquid/solid ratio 10 mL/g, and temperature 100°C for 5 h. X-ray diffraction and scanning electron microscopy examination of the raw material and leaching residue samples indicated that the intermetallic compounds Cu5Zn8and Cu2Zn, metallic zinc, and iron in the raw material dissolved, leaving the insoluble components PbSO4 and Pb as the major compounds in the leaching residue. A 98.5% proportion of the indium in the leaching solution was selectively extracted with 30% bis(2-ethylhexyl) phosphate and 70% kerosene by three-stage counter-current extraction, and 99.5% of the indium in the loaded organic phase was stripped by 6 mol/L HCl through four-stage counter-current stripping. The overall recovery yield of indium through all processes was approximately 92%.
Zhigan Deng; Xingbin Li; Chang Wei; Gang Fan; Minting Li; Cunxiong Li. Recovery of Indium from Hard Zinc Slag by Pressure Leaching and Solvent Extraction. JOM 2021, 73, 721 -728.
AMA StyleZhigan Deng, Xingbin Li, Chang Wei, Gang Fan, Minting Li, Cunxiong Li. Recovery of Indium from Hard Zinc Slag by Pressure Leaching and Solvent Extraction. JOM. 2021; 73 (2):721-728.
Chicago/Turabian StyleZhigan Deng; Xingbin Li; Chang Wei; Gang Fan; Minting Li; Cunxiong Li. 2021. "Recovery of Indium from Hard Zinc Slag by Pressure Leaching and Solvent Extraction." JOM 73, no. 2: 721-728.
The separation of zinc and iron is essential in hydrometallurgical processes, especially for treating high-iron sphalerite. The hematite precipitation process for removing iron is an effective way to achieve the high-efficiency separation of zinc and iron. The authors studied the effect of temperature and time on the precipitation behaviour and characterised the precipitation products through X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and chemical analysis. The hematite precipitate contained more than 50% iron, less than 0.5% zinc, 0.1% arsenic and 5% sulfur; more than 95% K, 50% Na and 50%–60% F were co-precipitated, and less than 1% Zn, Mg, Mn and Cl remained in the residue. Because of the uncontrolled supersaturation conditions, jarosite and goethite were generated. Extension of the reaction time and increasing the reaction temperature enabled conversion of most of the goethite and sodium jarosite to hematite during the hematite precipitation process.
Zhigan Deng; Beiping Zhu; Peng Zeng; Chang Wei; Xingbin Li; Cunxiong Li; Gang Fan. Behaviour and characterization of hematite process for iron removal in hydrometallurgical production. Canadian Metallurgical Quarterly 2018, 58, 223 -231.
AMA StyleZhigan Deng, Beiping Zhu, Peng Zeng, Chang Wei, Xingbin Li, Cunxiong Li, Gang Fan. Behaviour and characterization of hematite process for iron removal in hydrometallurgical production. Canadian Metallurgical Quarterly. 2018; 58 (2):223-231.
Chicago/Turabian StyleZhigan Deng; Beiping Zhu; Peng Zeng; Chang Wei; Xingbin Li; Cunxiong Li; Gang Fan. 2018. "Behaviour and characterization of hematite process for iron removal in hydrometallurgical production." Canadian Metallurgical Quarterly 58, no. 2: 223-231.
Ni–Mo ore is a black shale containing amorphous colloidal sulfides which have highly active. The oxygen pressure leaching behavior of nickel from black shale in aqueous media is presented. The effects of agitation speed, temperature, oxygen partial pressure and particle size on the rate of nickel leaching were determined. The results indicate that at low temperature hydrothermal and excess oxygen presence, the amorphous sulfides are easily oxidized to sulfuric acid and sulfate, and leaching nickel. The mathematical analyses of the experimental data for various experimental conditions indicated that the dissolution process was controlled by the chemical reaction during the early stage of dissolution, and was then controlled by liquid-film diffusion. In the initial stage of leaching, the reaction depends on oxygen partial pressure.
Zhigan Deng; Xingbin Li; Minting Li; Chang Wei; Gang Fan; Cunxiong Li. Oxygen Pressure Leaching Behavior of Nickel from Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago 2018, 1819 -1828.
AMA StyleZhigan Deng, Xingbin Li, Minting Li, Chang Wei, Gang Fan, Cunxiong Li. Oxygen Pressure Leaching Behavior of Nickel from Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2018; ():1819-1828.
Chicago/Turabian StyleZhigan Deng; Xingbin Li; Minting Li; Chang Wei; Gang Fan; Cunxiong Li. 2018. "Oxygen Pressure Leaching Behavior of Nickel from Black Shale." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 1819-1828.
Cooling crystallization was used to separate iron (III) and nickel (II) from acidic sulfate solution produced by leaching of molybdenum-nickel black shale. The effect of K2SO4 concentration, crystallization temperature, solution pH and crystallization time on recovery of nickel (II) and precipitation of iron (III) was investigated, in order to obtain effective separation of nickel and iron. The optimum parameters determined were as follows: 200 g/L K2SO4, 10 °C crystallization temperature, solution pH of 0.5 and 24 h crystallization. Under these conditions, 97.6% nickel (II) was recovered as K2Ni(SO4)2·6H2O crystals and only 2.0% of the total iron (III) was precipitated. Recrystallization yielded K2Ni(SO4)2·6H2O crystals with a purity of 98.4%.
Zhigan Deng; Xingbin Li; Gang Fan; Chang Wei; Cunxiong Li; Minting Li. Separation of Iron (III) and Nickel (II) from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago 2018, 2193 -2202.
AMA StyleZhigan Deng, Xingbin Li, Gang Fan, Chang Wei, Cunxiong Li, Minting Li. Separation of Iron (III) and Nickel (II) from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2018; ():2193-2202.
Chicago/Turabian StyleZhigan Deng; Xingbin Li; Gang Fan; Chang Wei; Cunxiong Li; Minting Li. 2018. "Separation of Iron (III) and Nickel (II) from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 2193-2202.
Hematite produced by the zinc industry exhibits a high sulfur content, being mainly contaminated by jarosite as the main sulfur-containing phase, and is thus of limited use for the steelmaking industry. Herein, we investigate the effects of parameters such as temperature (170–200 °C) and initial concentrations of sulfuric acid (0–19.6 g/L), sodium sulfate (0–35.5 g/L), hematite seeds (0–30 g/L), and Zn2+ (80–120 g/L) on the formation and conversion of jarosite during hematite precipitation from a ferrous sulfate solution, obtaining high-quality hematite with a low sulfur content. We reveal that increased temperature not only benefits jarosite conversion but also reduces the sulfur content of precipitates and enriches them in iron. Sulfuric acid concentrations of 4.9–19.6 g/L greatly decrease the fraction of precipitated iron and produce sulfur-rich precipitates containing significant amounts of both hematite and jarosite, whereas sodium sulfate increases the iron removal efficiency and the sodium content in hematite precipitates. Hematite seeds prompt the precipitation of hematite and affect the composition of the obtained precipitates, promoting the precipitation of hematite in preference to jarosite at relatively low temperatures. Finally, zinc sulfate concentrations of 80–120 g/L have a positive effect on iron removal as hematite.
Cunxiong Li; Zhigan Deng; Chang Wei; Gang Fan; Xingbin Li; Minting Li; Yizhao Wang. Production of low-sulfur hematite by hydrothermal oxydrolysis of ferrous sulfate. Hydrometallurgy 2018, 178, 294 -300.
AMA StyleCunxiong Li, Zhigan Deng, Chang Wei, Gang Fan, Xingbin Li, Minting Li, Yizhao Wang. Production of low-sulfur hematite by hydrothermal oxydrolysis of ferrous sulfate. Hydrometallurgy. 2018; 178 ():294-300.
Chicago/Turabian StyleCunxiong Li; Zhigan Deng; Chang Wei; Gang Fan; Xingbin Li; Minting Li; Yizhao Wang. 2018. "Production of low-sulfur hematite by hydrothermal oxydrolysis of ferrous sulfate." Hydrometallurgy 178, no. : 294-300.
Nickel was separated and precipitated with potassium nickel sulfate hexahydrate [K2Ni(SO4)2·6H2O] from acidic sulfate solution, a leach solution from molybdenum-nickel black shale. The effects of the potassium sulfate (K2SO4) concentration, crystallization temperature, solution pH, and crystallization time on nickel(II) recovery and iron(III) precipitation were investigated, revealing that nickel and iron were separated effectively. The optimum parameters were K2SO4 concentration of 200 g/L, crystallization temperature of 10°C, solution pH of 0.5, and crystallization time of 24 h. Under these conditions, 97.6% nickel(II) was recovered as K2Ni(SO4)2·6H2O crystals while only 2.0% of the total iron(III) was precipitated. After recrystallization, 98.4% pure K2Ni(SO4)2·6H2O crystals were obtained in the solids. The mother liquor was purified by hydrolysis-precipitation followed by cooling, and more than 99.0% K2SO4 could be crystallized. A process flowsheet was developed to separate iron(III) and nickel(II) from acidic-sulfate solution.
Zhigan Deng; Chang Wei; Gang Fan; Xingbin Li; Minting Li; Cunxiong Li. Separation and Precipitation of Nickel from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale by Potassium Nickel Sulfate Hexahydrate Crystallization. JOM 2018, 70, 1997 -2002.
AMA StyleZhigan Deng, Chang Wei, Gang Fan, Xingbin Li, Minting Li, Cunxiong Li. Separation and Precipitation of Nickel from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale by Potassium Nickel Sulfate Hexahydrate Crystallization. JOM. 2018; 70 (10):1997-2002.
Chicago/Turabian StyleZhigan Deng; Chang Wei; Gang Fan; Xingbin Li; Minting Li; Cunxiong Li. 2018. "Separation and Precipitation of Nickel from Acidic Sulfate Leaching Solution of Molybdenum-Nickel Black Shale by Potassium Nickel Sulfate Hexahydrate Crystallization." JOM 70, no. 10: 1997-2002.
Iron precipitation occupies a vital position in the metallurgy industry, especially for treating iron-bearing sphalerite in hydrometallurgical processes. This paper emphasizes techniques for removing iron from high-iron sphalerite via hematite precipitation, and describes the results of research performed to examine ferrous oxydrolysis and precipitation. The behavior and mechanism of conversion between the iron phase and hematite residue at elevated temperature under pressure is ascertained by investigating the dissolving characteristic and thermodynamics stable area of hematite at sulfate system. The results show hematite precipitation went through the process of crystallization, dissolve, oxidation and precipitation of ferrous sulfate, and the overall iron precipitation was determined to be controlled by the rate of ferric sulphate hydrolysis rather than the oxidation of ferrous sulphate or the re-dissolution of ferrous sulphate crystals, or the transformation of basic ferric sulphate.
Zhigan Deng; Chang Wei; Xingbin Li; Cunxiong Li; Gang Fan; Minting Li. Hematite Precipitation from High Iron Solution in Hydrometallurgy Process. Proceedings of the International Conference on Martensitic Transformations: Chicago 2018, 547 -555.
AMA StyleZhigan Deng, Chang Wei, Xingbin Li, Cunxiong Li, Gang Fan, Minting Li. Hematite Precipitation from High Iron Solution in Hydrometallurgy Process. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2018; ():547-555.
Chicago/Turabian StyleZhigan Deng; Chang Wei; Xingbin Li; Cunxiong Li; Gang Fan; Minting Li. 2018. "Hematite Precipitation from High Iron Solution in Hydrometallurgy Process." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 547-555.
Molybdenum and nickel in black shale ore exists as amorphous sulfides which has highly active, and easily oxide to sulfuric acid and sulfate at low temperature in the presence of excess oxygen. Take advantage of the characteristic to leach molybdenum and nickel from black shale. Oxidation, conversion and dissolution behavior of amorphous colloidal molybdenum and nickel sulfide in pressure leaching process was studied. The effects of stirring speed, temperature, concentration of sulphuric acid, oxygen process and mineral granularity on molybdenum and nickel leaching were investigated. The results showed that dissolution rate increased with increasing temperature and stirring speed, but decreased with increasing concentration of sulphuric acid. And dissolution of molybdenum and nickel from ore only need oxygen without any other reagent.
Zhigan Deng; Xingbin Li; Chang Wei; Gang Fan. Pressure Leaching Behavior of Molybdenum-Nickel Sulfide from Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago 2017, 247 -254.
AMA StyleZhigan Deng, Xingbin Li, Chang Wei, Gang Fan. Pressure Leaching Behavior of Molybdenum-Nickel Sulfide from Black Shale. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2017; ():247-254.
Chicago/Turabian StyleZhigan Deng; Xingbin Li; Chang Wei; Gang Fan. 2017. "Pressure Leaching Behavior of Molybdenum-Nickel Sulfide from Black Shale." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 247-254.
Fan Zhang; Chang Wei; Zhi-Gan Deng; Cun-Xiong Li; Xing-Bin Li; Min-Ting Li. Reductive leaching of zinc and indium from industrial zinc ferrite particulates in sulphuric acid media. Transactions of Nonferrous Metals Society of China 2016, 26, 2495 -2501.
AMA StyleFan Zhang, Chang Wei, Zhi-Gan Deng, Cun-Xiong Li, Xing-Bin Li, Min-Ting Li. Reductive leaching of zinc and indium from industrial zinc ferrite particulates in sulphuric acid media. Transactions of Nonferrous Metals Society of China. 2016; 26 (9):2495-2501.
Chicago/Turabian StyleFan Zhang; Chang Wei; Zhi-Gan Deng; Cun-Xiong Li; Xing-Bin Li; Min-Ting Li. 2016. "Reductive leaching of zinc and indium from industrial zinc ferrite particulates in sulphuric acid media." Transactions of Nonferrous Metals Society of China 26, no. 9: 2495-2501.
The solvent extraction of zinc from ammoniacal/ammonium sulfate solutions using a mixture of β-diketone, 1-benzoyl-2 nonyl ketone (Mextral54–100, HA), and 2-hydroxy-5-nonylacetophenone oxime (Mextral 84H, HR) in sulphonated kerosene has been investigated. The effects of different ratio of extractants, extractants concentration, aqueous pH, total ammonia concentration and temperature on zinc extraction were examined. The results indicate that the mixture of Mextral54–100 and Mextral 84H shows evident synergistic effects on zinc extraction, and zinc is extracted as ZnAR by the mixed extractants. As the molar fraction of HR rises, the co-extraction ammonia content increases constantly and reaches a maximum value at χ(HR) 0.5. The extraction efficiency decreases dramatically with the increase of aqueous pH and total ammonia concentration, indicating that the formation of zinc amine complexes depresses the ligand exchange reaction. The thermodynamic parameter ΔH shows that the extractions of zinc by both extraction systems are exothermic driven. FT-IR studies confirm that the ammonia molecules can be co-extracted into synergistic adducts.
Fuli Tang; Xingbin Li; Chang Wei; Gang Fan; Rulong Zhu; Cunxiong Li. Synergistic extraction of zinc from ammoniacal/ammonia sulfate solution by a mixture of β-diketone and 2-hydroxy-5-nonylacetophenone oxime. Hydrometallurgy 2016, 162, 42 -48.
AMA StyleFuli Tang, Xingbin Li, Chang Wei, Gang Fan, Rulong Zhu, Cunxiong Li. Synergistic extraction of zinc from ammoniacal/ammonia sulfate solution by a mixture of β-diketone and 2-hydroxy-5-nonylacetophenone oxime. Hydrometallurgy. 2016; 162 ():42-48.
Chicago/Turabian StyleFuli Tang; Xingbin Li; Chang Wei; Gang Fan; Rulong Zhu; Cunxiong Li. 2016. "Synergistic extraction of zinc from ammoniacal/ammonia sulfate solution by a mixture of β-diketone and 2-hydroxy-5-nonylacetophenone oxime." Hydrometallurgy 162, no. : 42-48.
Indium and zinc extraction from an indium-bearing zinc residue were investigated using sphalerite concentrate as a reductant in sulfuric acid medium. The effects of amount of sphalerite concentrate, sulfuric acid concentration, particle size, leaching time as well as temperature were discussed. The results showed that high indium and zinc extraction yield as well as high Fe2 +/Fe3 + molar ratio could be obtained by reduction leaching of zinc residue with addition of sphalerite concentrate as a reductant. The optimal leaching condition was determined as 150 g/L H2SO4, 0.95 times of theoretic amount of sphalerite concentrate for 4 h at 90 °C while using particles in the range of 74–58 μm. The leaching efficiencies were 94.8% of indium, 96.1% of zinc and 92.8% of iron, respectively, and a Fe2 +/Fe3 + molar ratio of 7.5 in the leach solution was also obtained. The process above was a viable method that effectively extracted zinc and indium and converted Fe3 + into Fe2 + at the same time.
Fan Zhang; Chang Wei; Zhigan Deng; Xingbin Li; Cunxiong Li; Minting Li. Reductive leaching of indium-bearing zinc residue in sulfuric acid using sphalerite concentrate as reductant. Hydrometallurgy 2016, 161, 102 -106.
AMA StyleFan Zhang, Chang Wei, Zhigan Deng, Xingbin Li, Cunxiong Li, Minting Li. Reductive leaching of indium-bearing zinc residue in sulfuric acid using sphalerite concentrate as reductant. Hydrometallurgy. 2016; 161 ():102-106.
Chicago/Turabian StyleFan Zhang; Chang Wei; Zhigan Deng; Xingbin Li; Cunxiong Li; Minting Li. 2016. "Reductive leaching of indium-bearing zinc residue in sulfuric acid using sphalerite concentrate as reductant." Hydrometallurgy 161, no. : 102-106.
The recovery of vanadium from sulfuric and hydrofluoric mixed acid solutions generated by the direct leaching of black shale was investigated using solvent extraction and precipitation methods. The process consisted of reduction, solvent extraction, and stripping, followed by precipitation and calcination to yield vanadium pentoxide. The influence of various operating parameters on the extraction and recovery of vanadium was studied. Vanadium (IV) was selectively extracted using a mixture of 10% (v/v) di(2-ethylhexyl)phosphoric acid and 5% (v/v) tri-n-butylphosphate in sulfonated kerosene. Using six extraction and five stripping stages, the extraction efficiency for vanadium was 96.7% and the stripping efficiency was 99.7%. V2O5 with a purity of 99.52% was obtained by oxidation of the loaded strip solution and precipitation of ammonium polyvanadate at pH 1.8 to 2.2, followed by calcination of the dried precipitate at 550 °C for 2 h. It was concluded that the combination of solvent extraction and precipitation is an efficient method for the recovery of vanadium from a multi-element leach solution generated from black shale.
Xingbin Li; Chang Wei; Zhigan Deng; Cunxiong Li; Gang Fan; Minting Li; Hui Huang. Recovery of Vanadium from H2SO4-HF Acidic Leaching Solution of Black Shale by Solvent Extraction and Precipitation. Metals 2016, 6, 63 .
AMA StyleXingbin Li, Chang Wei, Zhigan Deng, Cunxiong Li, Gang Fan, Minting Li, Hui Huang. Recovery of Vanadium from H2SO4-HF Acidic Leaching Solution of Black Shale by Solvent Extraction and Precipitation. Metals. 2016; 6 (3):63.
Chicago/Turabian StyleXingbin Li; Chang Wei; Zhigan Deng; Cunxiong Li; Gang Fan; Minting Li; Hui Huang. 2016. "Recovery of Vanadium from H2SO4-HF Acidic Leaching Solution of Black Shale by Solvent Extraction and Precipitation." Metals 6, no. 3: 63.
The filtration problems on acid leaching sludge of high silicon zinc ore have been paid extensive attention in zinc hydrometallurgy. It was found that soluble silica can be effectively converted into silica precipitate with good settling, filtration and washing properties, and the filtration rate can be in excess of 800 L/m2· h under certain leaching conditions. According to investigating on the filtration rate, viscosity and concentration of silica of leaching sludge or liquor, the filtering temperature can tremendously improve the filtration property of pulp. At the same time, the experimental data indicated that the viscosity of leaching liquor was the key factor influencing filtration property of leaching sludge.
Hailong Yang; Cunxiong Li; Chang Wei; Zhigan Deng; Xingbin Li; Gang Fan; Minting Li. Filtration Property of Pure Willemite Acid Leaching Sludge Under Pressure. 7th International Symposium on High-Temperature Metallurgical Processing 2016, 651 -658.
AMA StyleHailong Yang, Cunxiong Li, Chang Wei, Zhigan Deng, Xingbin Li, Gang Fan, Minting Li. Filtration Property of Pure Willemite Acid Leaching Sludge Under Pressure. 7th International Symposium on High-Temperature Metallurgical Processing. 2016; ():651-658.
Chicago/Turabian StyleHailong Yang; Cunxiong Li; Chang Wei; Zhigan Deng; Xingbin Li; Gang Fan; Minting Li. 2016. "Filtration Property of Pure Willemite Acid Leaching Sludge Under Pressure." 7th International Symposium on High-Temperature Metallurgical Processing , no. : 651-658.
During the process of hematite precipitation, the transformation of Na jarosite convert into hematite has been studied in a batch reactor at different temperatures, ranging from 170°C to 200°C with 3h of the retention time in the presence of 30g/L Fe (II) and 4g/L Na+. The composition of precipitation was seriously depended on the temperature, at 170°C hematite and sodium jarosite are the reaction products of iron precipitate, with an increasing in reaction temperature the sodium, sulfur content in precipitated decreased and sulfur mainly exist in forms of SO42-, and when temperature over 200°C hematite was the only phase in product. An increasing temperature was not only beneficial to iron precipitation, also conducive to jarosite conversion to form high quality hematite precipitate.
Yizhao Wang; Cunxiong Li; Zhigan Deng; Xingbin Li; Chang Wei; Gang Fan. Transformation of Sodium Jarosite to Hematite in Hydrothermal Iron Precipitation Process. 7th International Symposium on High-Temperature Metallurgical Processing 2016, 635 -642.
AMA StyleYizhao Wang, Cunxiong Li, Zhigan Deng, Xingbin Li, Chang Wei, Gang Fan. Transformation of Sodium Jarosite to Hematite in Hydrothermal Iron Precipitation Process. 7th International Symposium on High-Temperature Metallurgical Processing. 2016; ():635-642.
Chicago/Turabian StyleYizhao Wang; Cunxiong Li; Zhigan Deng; Xingbin Li; Chang Wei; Gang Fan. 2016. "Transformation of Sodium Jarosite to Hematite in Hydrothermal Iron Precipitation Process." 7th International Symposium on High-Temperature Metallurgical Processing , no. : 635-642.
Zhi-Gan Deng; Chang Wei; Xing-Bin Li; Gang Fan. Leaching Mo and Ni by Direct Oxygen Pressure from Black Shale with any other only water. Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering 2016, 1 .
AMA StyleZhi-Gan Deng, Chang Wei, Xing-Bin Li, Gang Fan. Leaching Mo and Ni by Direct Oxygen Pressure from Black Shale with any other only water. Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering. 2016; ():1.
Chicago/Turabian StyleZhi-Gan Deng; Chang Wei; Xing-Bin Li; Gang Fan. 2016. "Leaching Mo and Ni by Direct Oxygen Pressure from Black Shale with any other only water." Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering , no. : 1.
Solvent extraction and separation of indium and copper from zinc residue reductive leach liquor containing a high concentration of zinc (ca. 85 g/L) and iron (ca. 35 g/L) was studied. Di-(2-ethylhexyl) phosphoric acid (D2EHPA) and Acorga M5640 were used as extractants for indium and copper, respectively. Indium was preferentially extracted by 15%(v/v) D2EHPA with three-stage extraction using an aqueous/organic (A/O) phase ratio of 6/1. Indium was effectively stripped from the D2EHPA organic phase by 4 M HCl. Copper was subsequently extracted selectively from the indium-extracted solution using 15%(v/v) Acorga M5640 with three-stage extraction using an A/O phase ratio of 2/1. Copper in the loaded Acorga M5640 organic phase was stripped by a synthetic spent electrolyte solution containing 25 g/L Cu and 180 g/L H2SO4. Based on the experimental results, a flowsheet for the separation and recovery of indium and copper from the reductive leach solution was developed and tested. The results showed that 95.4% of indium and 95.5% of copper were extracted, and the measured separation factors βIn/Zn, βIn/Cu, βIn/Fe, βCuZn, and βCuFe were 4979, 1975, 3719, 1719, and 2446, respectively.
Xingbin Li; Chang Wei; Zhigan Deng; Cunxiong Li; Gang Fan; Hao Rong; Fan Zhang. Extraction and separation of indium and copper from zinc residue leach liquor by solvent extraction. Separation and Purification Technology 2015, 156, 348 -355.
AMA StyleXingbin Li, Chang Wei, Zhigan Deng, Cunxiong Li, Gang Fan, Hao Rong, Fan Zhang. Extraction and separation of indium and copper from zinc residue leach liquor by solvent extraction. Separation and Purification Technology. 2015; 156 ():348-355.
Chicago/Turabian StyleXingbin Li; Chang Wei; Zhigan Deng; Cunxiong Li; Gang Fan; Hao Rong; Fan Zhang. 2015. "Extraction and separation of indium and copper from zinc residue leach liquor by solvent extraction." Separation and Purification Technology 156, no. : 348-355.
Xingbin Li; Zhigan Deng; Chang Wei; Cunxiong Li; Minting Li; Gang Fan; Hui Huang. Solvent extraction of vanadium from a stone coal acidic leach solution using D2EHPA/TBP: Continuous testing. Hydrometallurgy 2015, 154, 40 -46.
AMA StyleXingbin Li, Zhigan Deng, Chang Wei, Cunxiong Li, Minting Li, Gang Fan, Hui Huang. Solvent extraction of vanadium from a stone coal acidic leach solution using D2EHPA/TBP: Continuous testing. Hydrometallurgy. 2015; 154 ():40-46.
Chicago/Turabian StyleXingbin Li; Zhigan Deng; Chang Wei; Cunxiong Li; Minting Li; Gang Fan; Hui Huang. 2015. "Solvent extraction of vanadium from a stone coal acidic leach solution using D2EHPA/TBP: Continuous testing." Hydrometallurgy 154, no. : 40-46.
An improved analytical procedure has been described for the spectrophotometric determination of colloidal silica in leaching solution by means of adding fluoride to convert colloidal silica into reactive silica. The method is a variation of the classical molybdenum blue method, and the optimal wavelength, temperature, ratio of H3BO3/NH4F, pH and ammonium molybdate in the colorimetric process has been determined. The pH especially needs to be fairly strictly controlled. The linear equation is established as: C = 3.15956A − 0.51912, and R is more than 0.9992. Its feasibility and reproducibility have been confirmed by ICP-OES; the average relative error is 1.5%. The detection scope of silicon concentration extends almost 1000 times higher in a leaching solution, so the method in this paper can be used to detect leaching samples with a high silica concentration.
Hailong Yang; Cunxiong Li; Chang Wei; Minting Li; Xingbin Li; Zhigan Deng; Gang Fan. Molybdenum blue photometry method for the determination of colloidal silica and soluble silica in leaching solution. Analytical Methods 2015, 7, 5462 -5467.
AMA StyleHailong Yang, Cunxiong Li, Chang Wei, Minting Li, Xingbin Li, Zhigan Deng, Gang Fan. Molybdenum blue photometry method for the determination of colloidal silica and soluble silica in leaching solution. Analytical Methods. 2015; 7 (13):5462-5467.
Chicago/Turabian StyleHailong Yang; Cunxiong Li; Chang Wei; Minting Li; Xingbin Li; Zhigan Deng; Gang Fan. 2015. "Molybdenum blue photometry method for the determination of colloidal silica and soluble silica in leaching solution." Analytical Methods 7, no. 13: 5462-5467.
The purpose of this work was to study the feasibility at laboratory-scale of a hydrometallurgical process for the selective recovery of valuable metals from partial silicated sphalerite in an oxygen pressure acid leaching system. The factors influencing dissolution efficiency of the ore were investigated and optimized. Under optimum conditions (i.e., temperature of 433 K, sulfuric acid concentration of 41.2 g/L, leaching time of 2.5 h, liquid/solid ratio of 6 mL/g, and pressure of 1.6 MPa) over 97% Zn was extracted into the leach liquor together with 0.3% SiO2 and 2.9% Pb. The leaching slurry had good solid–liquid separation characteristics, and the filtration rate could be as high as 716 L/m2 h. About 96% oxidation of sulfide sulfur to sulfate was achieved under these conditions. Analysis of the content of elemental sulfur in the leaching residues indicated that the fraction of sulfide sulfur determined as elemental sulfur was about 10% at 393 K, and that it decreased with temperature down to 0.5% at 453 K. Ultimate solid residues, which have been concentrated in silica and lead, can be oriented toward the lead smelter after alkali roasting-water washing pretreatment for metal recovery.
Hongsheng Xu; Chang Wei; Cunxiong Li; Zhigan Deng; Gang Fan; Minting Li; Xingbin Li. Selective recovery of valuable metals from partial silicated sphalerite at elevated temperature with sulfuric acid solution. Journal of Industrial and Engineering Chemistry 2014, 20, 1373 -1381.
AMA StyleHongsheng Xu, Chang Wei, Cunxiong Li, Zhigan Deng, Gang Fan, Minting Li, Xingbin Li. Selective recovery of valuable metals from partial silicated sphalerite at elevated temperature with sulfuric acid solution. Journal of Industrial and Engineering Chemistry. 2014; 20 (4):1373-1381.
Chicago/Turabian StyleHongsheng Xu; Chang Wei; Cunxiong Li; Zhigan Deng; Gang Fan; Minting Li; Xingbin Li. 2014. "Selective recovery of valuable metals from partial silicated sphalerite at elevated temperature with sulfuric acid solution." Journal of Industrial and Engineering Chemistry 20, no. 4: 1373-1381.
The sample with smithsonite and cerussite as the main valuable metal minerals is a carbonate-hosted lead-zinc ore in the current study. Hydrothermal sulfidation of oxidized zinc-lead ore was carried out with a particle size of 74 to 58 μm and the mole ratio of sulfur and zinc of 2.0 at 453 K (180 °C) for 240 minutes, and 73 pct zinc and 86 pct lead sulfidation fraction were achieved. Flotation of the unsulfided sample was ineffective, with less than 55 pct recovery of zinc and lead. After sulfidation, the recoveries of zinc and lead in flotation concentrate were over 92 pct. A flotation concentrate was obtained with zinc and lead content of 41.2 pct and 22.1 pct, respectively.
Cun-Xiong Li; Chang Wei; Zhi-Gan Deng; Xing-Bin Li; Min-Ting Li; Hong-Sheng Xu. Hydrothermal Sulfidation and Flotation of Oxidized Zinc-Lead Ore. Metallurgical and Materials Transactions A 2014, 45, 833 -838.
AMA StyleCun-Xiong Li, Chang Wei, Zhi-Gan Deng, Xing-Bin Li, Min-Ting Li, Hong-Sheng Xu. Hydrothermal Sulfidation and Flotation of Oxidized Zinc-Lead Ore. Metallurgical and Materials Transactions A. 2014; 45 (3):833-838.
Chicago/Turabian StyleCun-Xiong Li; Chang Wei; Zhi-Gan Deng; Xing-Bin Li; Min-Ting Li; Hong-Sheng Xu. 2014. "Hydrothermal Sulfidation and Flotation of Oxidized Zinc-Lead Ore." Metallurgical and Materials Transactions A 45, no. 3: 833-838.