Enrichment of valuable metals from the sulfuric acid leach liquors of nickeliferous oxide ores

2009 ◽  
Vol 95 (1-2) ◽  
pp. 28-32 ◽  
Author(s):  
Yanbin Xu ◽  
Yanting Xie ◽  
Junshen Liu ◽  
Lan Yan ◽  
Rudong Yang
Keyword(s):  
Sulfuric Acid ◽  
Acid Leach ◽  
Valuable Metals

Recovery of gallium from sulfuric acid leach liquor of coal fly ash by stepwise separation using P507 and Cyanex 272

2020 ◽  
Vol 381 ◽  
pp. 122699 ◽  
Author(s):  
Zesen Zhao ◽  
Li Cui ◽  
Yanxia Guo ◽  
Huiquan Li ◽  
Fangqin Cheng
Keyword(s):  
Sulfuric Acid ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Leach Liquor ◽  
Cyanex 272 ◽  
Acid Leach

scholarly journals Basic Sulfate Precipitation of Zirconium from Sulfuric Acid Leach Solution

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1099 ◽  
Author(s):  
Yiqian Ma ◽  
Srecko Stopic ◽  
Xuewen Wang ◽  
Kerstin Forsberg ◽  
Bernd Friedrich
Keyword(s):  
Sulfuric Acid ◽  
Leach Solution ◽  
Precipitation Method ◽  
Zirconium Sulfate ◽  
Acid Leach ◽  
Low Concentrations ◽  
Quality Product ◽  
Reported Study ◽  
Co Precipitation ◽  
High Quality Product

H2SO4 was ensured to be the best candidate for Zr leaching from the eudialyte. The resulting sulfuric leach solution consisted of Zr(IV), Nb(V), Hf(IV), Al(III), and Fe(III). It was found that ordinary metal hydroxide precipitation was not feasible for obtaining a relatively pure product due to the co-precipitation of Al(III) and Fe(III). In this reported study, a basic zirconium sulfate precipitation method was investigated to recover Zr from a sulfuric acid leach solution of a eudialyte residue after rare earth elements extraction. Nb precipitated preferentially by adjusting the pH of the solution to around 1.0. After partial removal of SO42− by adding 120 g of CaCl2 per 1L solution, a basic zirconium sulfate precipitate was obtained by adjusting the pH to ~1.6 and maintaining the solution at 75 °C for 60 min. Under the optimum conditions, the loss of Zr during the SO42− removal step was only 0.11%, and the yield in the basic zirconium sulfate precipitation step was 96.18%. The precipitate contained 33.77% Zr and 0.59% Hf with low concentrations of Fe and Al. It was found that a high-quality product of ZrO2 could be obtained from the basic sulfate precipitate.

scholarly journals Sustainable Hydrometallurgical Recovery of Valuable Elements from Spent Nickel–Metal Hydride HEV Batteries

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1062 ◽  
Author(s):  
Kivanc Korkmaz ◽  
Mahmood Alemrajabi ◽  
Åke Rasmuson ◽  
Kerstin Forsberg
Keyword(s):  
Sulfuric Acid ◽  
Hydrochloric Acid ◽  
Hybrid Electric Vehicle ◽  
Active Material ◽  
Sulfuric Acid Concentration ◽  
Dissolution Kinetics ◽  
Leach Solution ◽  
Nickel Metal ◽  
Acid Leach ◽  
Kinetics Of

In the present study, the recovery of valuable metals from a Panasonic Prismatic Module 6.5 Ah NiMH 7.2 V plastic casing hybrid electric vehicle (HEV) battery has been investigated, processing the anode and cathode electrodes separately. The study focuses on the recovery of the most valuable compounds, i.e., nickel, cobalt and rare earth elements (REE). Most of the REE (La, Ce, Nd, Pr and Y) were found in the anode active material (33% by mass), whereas only a small amount of Y was found in the cathode material. The electrodes were leached in sulfuric acid and in hydrochloric acid, respectively, under different conditions. The results indicated that the dissolution kinetics of nickel could be slow as a result of slow dissolution kinetics of nickel oxide. At leaching in sulfuric acid, light rare earths were found to reprecipitate increasingly with increasing temperature and sulfuric acid concentration. Following the leaching, the separation of REE from the sulfuric acid leach liquor by precipitation as NaREE (SO4)2·H2O and from the hydrochloric acid leach solution as REE2(C2O4)3·xH2O were investigated. By adding sodium ions, the REE could be precipitated as NaREE (SO4)2·H2O with little loss of Co and Ni. By using a stoichiometric oxalic acid excess of 300%, the REE could be precipitated as oxalates while avoiding nickel and cobalt co-precipitation. By using nanofiltration it was possible to recover hydrochloric acid after leaching the anode material.

The Effect of pH on Bioleaching of Deerni Pyrite Roasting Residues as Magnetic Materials

2017 ◽  
Vol 730 ◽  
pp. 226-230 ◽  
Author(s):  
Xing Lan Cui ◽  
Hao En Zuo ◽  
Jian Kang Wen
Keyword(s):  
Sulfuric Acid ◽  
Magnetic Materials ◽  
Bacterial Growth ◽  
Culture Condition ◽  
Ph Value ◽  
Copper Deposit ◽  
Metal Extraction ◽  
Valuable Metal ◽  
Steel Making ◽  
Valuable Metals

The experiment focused on the Deerni pyrite roasting residues mainly made of magnetic materials such as hematite and magnetite in Qinghai Deerni Copper Deposit. The method of bioleaching sulfuric acid residue by bacteria was proposed for roasting residues desulfurization and valuable metal extraction. First of all, the study systematically performed multi-elements analysis, which provided scientific and technique basis for extraction of valuable metals. Subsequently, the effect of the pH value on the bacterial growth was investigated. The data revealed that pH at 1.2 was the optimum culture condition for the bacteria. The concentration of the bacteria at the best culture condition reached 8.5×107 cells/mL. Finally, the bioleaching experiments were performed to explore the ability of the NB bacteria to oxidize the Deerni pyrite roasting residues. The study demonstrated that the microorganism was able to effectively extract valuable metals such as copper and zinc. The total Fe and sulfur contents of the bioleaching residues account for 68.38% and 0.39%, respectively. The desulfurization effects are evident and bioleaching residues meet the requirements as magnetic materials in steel making industry.

Direct solvent extraction of molybdenum(VI) from sulfuric acid leach solutions using PC-88A

2015 ◽  
Vol 158 ◽  
pp. 114-118 ◽  
Author(s):  
Yun Xia ◽  
Liansheng Xiao ◽  
Chao Xiao ◽  
Li Zeng
Keyword(s):  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Direct Solvent Extraction ◽  
Acid Leach

Study on Treatment of Smelting Contaminated Acid by Evaporation Condensing Process

2014 ◽  
Vol 881-883 ◽  
pp. 564-569
Author(s):  
Da Chao Zhang ◽  
Xiao Lai Liu ◽  
Da Ming Guan ◽  
Xiao Yi Xu ◽  
Su Ying Wu
Keyword(s):  
Sulfuric Acid ◽  
Removal Rate ◽  
Solid Wastes ◽  
Copper Smelting ◽  
High Concentration ◽  
Removal Rates ◽  
Processing Cost ◽  
Valuable Metals ◽  
Different Temperatures ◽  
Copper Zinc

Copper smelting gas producing sulfuric acid process produces contaminated acid which contains high concentration of fluorine, chlorine, arsenic and copper, zinc, lead, cadmium and other metals. The sulfide precipitation and lime neutralization methods have been used at present. Those methods have some deficiencies as which produces a lot of hazardous and unwieldy solid wastes, spends huge processing cost, reuse difficultly the water after treatment. In this paper, according to characteristics of this kind of smelting contaminated acid, evaporation condensing process and the feasibility of recycling arsenic, sulfuric acid and valuable metals were studied. Under the condition of atmospheric heating evaporation, this study explored the distribution characteristics of fluorine, chlorine, sulfate radical, arsenic in condensate and in concentrate and the crystallization removal rates of arsenic trioxide in concentrate at different temperatures and different enrichment ratios. The results show arsenic, fluorine and chloride have good removal rates from contaminated acid by evaporation condensing process. Temperature at 130°C, enrichment multiple in 6~7, the removal rate of arsenic, fluorine and chlorine reached 62%, 88%, 77%. The results also show evaporation condensing process has good application prospects to treat smelting contaminated acid.

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