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  • An approach for simultaneous treatments of diamond wire ...

    Jul 09, 2020  Both diamond wire saw silicon kerf (DWSSK) and Ti-bearing blast furnace slag (TBBFS) are largely accumulated industrial wastes and important resources

  • High-purity copper recycled from smelter dust by sulfation ...

    Here we tested sulfation roasting, water leaching and electrorefining to recover Cu. We studied this process by thermochemical simulation and thermogravimetry to optimize sulfation roasting parameters such as time, temperature and quantity of sulfuric acid. Results show that copper can be selectively recovered as 99.9% of pure copper.

  • Gold Hydrometallurgy - Refining to High Purity

    High-purity gold was precipitated from the aqua regia solution with oxalic acid, sulfurous acid, sodium bisulfite, and gaseous sulfur dioxide. The leaching-precipitation

  • Recovery of High-Purity MnO2 from the Acid Leaching ...

    CLEANER MANUFACTURING OF CRITICAL METALS Recovery of High-Purity MnO 2 from the Acid Leaching Solution of Spent Li-Ion Batteries CHAO PENG ,1 CONG CHANG,1,2 ZULIN WANG ,1 BENJAMIN P. WILSON ,1 FUPENG LIU,1,3 and MARI LUNDSTRO¨ M 1,4 1.—Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering

  • Author: Chao Peng, Cong Chang, Cong Chang, Zulin Wang, Benjamin P. Wilson, Fupeng Liu, Fupeng Liu, Mari Lund...
  • Submission » DergiPark

    Oct 01, 2019  TY - JOUR T1 - Extraction of high-purity silica from rice husk via hydrochloric acid leaching treatment AU - Seitkhan Azat , Zhanar Sartova , Kalampyr Bekseıtova , Kydyr Askaruly Y1 - 2019 PY - 2019 N1 - DO - T2 - Turkish Journal of Chemistry JF - Journal JO - JOR SP - 1258 EP - 1269 VL - 43 IS - 5 SN - 1300-0527-1303-6130 M3 - UR - Y2 - 2020 ER -

  • Cited by: 1
  • Extraction of high-purity silica from rice husk via ...

    Extraction of high-purity silica from rice husk via hydrochloric acid leaching ... silica of ultrafine size, high reactivity, and high purity. The purpose of acid pretreatment is to improve purity and give a high surface area to the silica product during its precipitation [16]. It proves to be an effective way

  • Purification of rare earth element from monazite sulfuric ...

    Purification of rare earth element from monazite sulfuric acid leach liquor and the production of high purity ceric oxide Article in Minerals Engineering 23(6):536-540 May 2010 with 716 Reads

  • Impurities removal process for high-purity silica ...

    Acid leaching High purity silica Solar energy materials ABSTRACT This study presents a novel chemical process for the extraction of high purity silica from diatomite. The process

  • A Review on the Recovery of Titanium Dioxide from Ilmenite ...

    Strong acid leaching is promising in terms of the purity of the produced TiO2, low energy consumption and waste management. The effect of several factors on the acid leaching kinetics in reported processes was reviewed. Temperature, time and acid concentration significantly affect the dissolution of titanium and impurities in ilmenite.

  • Preparation of High Purity V2O5 from a Typical Low-Grade ...

    However, acid leaching can get higher vanadium leaching efficiency compared to water leaching and alkaline leaching. Therefore, the main task for vanadium leaching improvement is to reduce the acid consumption. Apart from leaching, the purification of the acid leaching solution is another difficulty because this is the key step for vanadium ...

  • Extraction of high-purity silica from rice husk via ...

    Extraction of high-purity silica from rice husk via hydrochloric acid leaching ... silica of ultrafine size, high reactivity, and high purity. The purpose of acid pretreatment is to improve purity and give a high surface area to the silica product during its precipitation [16]. It proves to be an effective way

  • Acid leaching technology for obtaining a high-purity of ...

    A leaching technology on samples of Algerian quartz sand deposit has been investigated in order to obtain high-purity silica (SiO2) as raw material intended for photovoltaic application. The enrichment process was carried out by using double acid percolation leaching method (HF and HCl) for reducing the iron rate in the final product and also ...

  • Recovery of High-Purity MnO2 from the Acid Leaching ...

    CLEANER MANUFACTURING OF CRITICAL METALS Recovery of High-Purity MnO 2 from the Acid Leaching Solution of Spent Li-Ion Batteries CHAO PENG ,1 CONG CHANG,1,2 ZULIN WANG ,1 BENJAMIN P. WILSON ,1 FUPENG LIU,1,3 and MARI LUNDSTRO¨ M 1,4 1.—Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering

  • HCL Leaching High Purity Alumina Market Forecast 2026

    High purity alumina characterized with minimum concentration of 99.99% is high end form of aluminum oxide. Owing to its superior properties such as high purity, corrosion resistance and hardness, HCL leaching high purity alumina is extensively used as an essential material in

  • A Review on the Recovery of Titanium Dioxide from Ilmenite ...

    Strong acid leaching is promising in terms of the purity of the produced TiO2, low energy consumption and waste management. The effect of several factors on the acid leaching kinetics in reported processes was reviewed. Temperature, time and acid concentration significantly affect the dissolution of titanium and impurities in ilmenite.

  • Uranium processing - Leaching Britannica

    Uranium processing - Uranium processing - Leaching: Roasted uranium ores are leached of their uranium values by both acidic and alkaline aqueous solutions. For the successful operation of all leaching systems, uranium must either be initially present in the more stable hexavalent state or be oxidized to that state in the leaching process. Acid leaching is commonly performed by agitating an

  • High-purity amorphous silica originated in rice husks via ...

    were employed, and subjected to the carboxylic acid leaching treatment by using citric acid (C 6H 8O 7) solution. Sulfuric acid solution was also used as the comparison in the leaching treatment. Both acid materials are made by Kishida Chemical Co., Ltd, and the purity of the carboxylic acid and sulfuric acid is 99.5% and 98% or more, respec ...

  • Preparation of High Purity V2O5 from a Typical Low-Grade ...

    However, acid leaching can get higher vanadium leaching efficiency compared to water leaching and alkaline leaching. Therefore, the main task for vanadium leaching improvement is to reduce the acid consumption. Apart from leaching, the purification of the acid leaching solution is another difficulty because this is the key step for vanadium ...

  • Make Alumina using Hydrochloric Acid

    However, a great deal of research has been conducted to devise processes for making high purity Al2O3 from domestic resources of clay and anorthosite. The most promising of several acid processes investigated appears to be HCl leaching of the clay followed by crystallization of

  • A facile lead acetate conversion process for synthesis of ...

    Jun 21, 2018  High‐purity metallic lead can be obtained from the spent lead paste through three steps: pre‐desulfurization, acid leaching and electrowinning. 8 But its high energy consumption and use of toxic acids (i.e. HBF 4 or H 2 SiF 6) need to be improved. 1 Also, the recovered metallic lead needs to be further treated by the Barton‐pot process or ...

  • High Purity Alumina Ambition Rocks PFS of King River ...

    Grinding down further non-magnetic material waste, which accounts for around ~70%, would smoothen the acid leaching process. Heated sulphuric acid leaching in agitated tanks - Leaching would be carried out on the non-magnetic component using 20% sulphuric acid at 20% pulp density, heated to 70 o C and agitated over three days.

  • US20110195017A1 - Process for the production of high ...

    The process comprises leaching the starting material to dissolve the magnesium; the solution is treated with alkali to precipitate the high purity magnesium hydroxide, and the remaining mother liquor is fed to a regeneration step of both the alkali used in the precipitation of high purity magnesium hydroxide, and the acid for leaching.

  • Plateau Energy Metals Announces Successful Metallurgical ...

    Jul 18, 2019  Tank Leach (95 °C): 77% – 81% overall recovery via a 24-hour up-front acid leach with total sulfuric acid addition of 370 kg per tonne of mineralized material, followed by conventional purification and precipitation of a high purity (99.74%) Li2CO3.

  • Acid leaching purification and neutron activation analysis ...

    Nov 01, 2009  Acid leaching purification and neutron activation analysis of high purity silicas Acid leaching purification and neutron activation analysis of high purity silicas Lee, K.; Yoon, Y.; Jeong, S.; Chae, Y.; Ko, K. 2009-11-01 00:00:00 The effects of acids on the removal of impurity from 2N grade silica have been studied using ï¬ ve leaching acids: 0.2 M-oxalic acid (pH 1.5 and 2.5), c-aqua regia ...

  • Acid leaching technology for obtaining a high-purity of ...

    A leaching technology on samples of Algerian quartz sand deposit has been investigated in order to obtain high-purity silica (SiO2) as raw material intended for photovoltaic application. The enrichment process was carried out by using double acid percolation leaching method (HF and HCl) for reducing the iron rate in the final product and also ...

  • Acid leaching purification and neutron activation analysis ...

    Nov 01, 2009  Acid leaching purification and neutron activation analysis of high purity silicas Acid leaching purification and neutron activation analysis of high purity silicas Lee, K.; Yoon, Y.; Jeong, S.; Chae, Y.; Ko, K. 2009-11-01 00:00:00 The effects of acids on the removal of impurity from 2N grade silica have been studied using ï¬ ve leaching acids: 0.2 M-oxalic acid (pH 1.5 and 2.5), c-aqua regia ...

  • High-purity amorphous silica originated in rice husks via ...

    Oct 30, 2008  The environmentally benign, harmless to human, and economically effective process to produce high-purity amorphous SiO2 materials from rice husks has been established by using a carboxylic acid leaching, not the conventional strong acids. TG-DTA measurement and GCMS analysis indicated that the leaching was effective for the hydrolysis of celluloses and hemicelluloses contained

  • High Purity Alumina Ambition Rocks PFS of King River ...

    Grinding down further non-magnetic material waste, which accounts for around ~70%, would smoothen the acid leaching process. Heated sulphuric acid leaching in agitated tanks - Leaching would be carried out on the non-magnetic component using 20% sulphuric acid at 20% pulp density, heated to 70 o C and agitated over three days.

  • US20110195017A1 - Process for the production of high ...

    The process comprises leaching the starting material to dissolve the magnesium; the solution is treated with alkali to precipitate the high purity magnesium hydroxide, and the remaining mother liquor is fed to a regeneration step of both the alkali used in the precipitation of high purity magnesium hydroxide, and the acid for leaching.

  • Preparation of High Purity V2O5 from a Typical Low-Grade ...

    However, acid leaching can get higher vanadium leaching efficiency compared to water leaching and alkaline leaching. Therefore, the main task for vanadium leaching improvement is to reduce the acid consumption. Apart from leaching, the purification of the acid leaching solution is another difficulty because this is the key step for vanadium ...

  • A facile lead acetate conversion process for synthesis of ...

    Jun 21, 2018  High‐purity metallic lead can be obtained from the spent lead paste through three steps: pre‐desulfurization, acid leaching and electrowinning. 8 But its high energy consumption and use of toxic acids (i.e. HBF 4 or H 2 SiF 6) need to be improved. 1 Also, the recovered metallic lead needs to be further treated by the Barton‐pot process or ...

  • Physics and chemistry of beryllium - Materion

    ACID LEACHING CCD-THICKENERS SOLVENT EXTRACTION IRON HYDROLYSIS A-HYDROLYSIS A-PRODUCT FILTRATION CAKE REPULP B-HYDROLYSIS B-PRODUCT FILTRATION TO URANIUM EXTRACTION ... beryllium of exception-ally high purity. 3. Vacuum casting. The final processing step for beryllium pebbles is vacuum casting to remove any remaining reduction slag and magnesium .

  • Plateau Energy Metals Announces Successful Metallurgical ...

    Jul 18, 2019  Tank Leach (95 °C): 77% – 81% overall recovery via a 24-hour up-front acid leach with total sulfuric acid addition of 370 kg per tonne of mineralized material, followed by conventional purification and precipitation of a high purity (99.74%) Li2CO3.

  • Study of Acid Leaching in the Preparation of Silicon from ...

    Jul 14, 2015  Study of Acid Leaching in the Preparation of Silicon from Lapindo Mud Muhibullah Abdisy Syakur Al Mubarok1, Lisna Putri Setiawan2, Maisari Utami3, and Wega Trisunaryanti4 1,2,3,4 ... High purity ...

  • Chemical Leaching Plant For High Purity Quartz

    . acid leaching, solvent extraction, and chemical . in most plants of China and the purity of . with high purity from sulfuric acid leach solution . Get Price And Support Online Purity

  • A novel technique for microcrystalline graphite ...

    Alkali-acid leaching process could enhance the carbon content of microcrystalline graphite to a higher level than the traditional method of alkali roasting-acid leaching process. KEYWORDS: Alkali-acid leaching , high-purity graphite , microcrystalline graphite

  • The Effect of Sulphuric Acid Concentration on the Removal ...

    The leaching of C FA using sulphuric acid results in a silicon -rich solid residue, which can be purified to produce silica or silica -related products . Extracting silicon from CFA for the synthesis of silica products of high purity will thus

  • 3 ELECTROLYTIC CHROMIUM-METAL PRODUCTION High-Purity ...

    The previous chapter focused on the use of high-purity chromium metal for high-performance alloys in jet-engine applications. Technical emphasis in this chapter focuses on the two main variations of the electrolytic process that have traditionally produced high-purity chromium metal: the trivalent chrome-alum electrolyte method and the chromic-acid electrolyte method.

  • Plateau Energy Metals Announces Successful Metallurgical ...

    Jul 18, 2019  Tank Leach (95 °C): 77% – 81% overall recovery via a 24-hour up-front acid leach with total sulfuric acid addition of 370 kg per tonne of mineralized material, followed by conventional purification and precipitation of a high purity (99.74%) Li2CO3.

  • Acid leaching purification and neutron activation analysis ...

    Nov 01, 2009  Acid leaching purification and neutron activation analysis of high purity silicas Acid leaching purification and neutron activation analysis of high purity silicas Lee, K.; Yoon, Y.; Jeong, S.; Chae, Y.; Ko, K. 2009-11-01 00:00:00 The effects of acids on the removal of impurity from 2N grade silica have been studied using ï¬ ve leaching acids: 0.2 M-oxalic acid (pH 1.5 and 2.5), c-aqua regia ...

  • High-purity amorphous silica originated in rice husks via ...

    Oct 30, 2008  The environmentally benign, harmless to human, and economically effective process to produce high-purity amorphous SiO2 materials from rice husks has been established by using a carboxylic acid leaching, not the conventional strong acids. TG-DTA measurement and GCMS analysis indicated that the leaching was effective for the hydrolysis of celluloses and hemicelluloses contained

  • Graphite Recycling from the Spent Lithium-Ion Batteries by ...

    The results show that the impurity removal efficiency by sulfuric acid curing–acid leaching is much higher than that by direct acid leaching, and the purity of the regenerated graphite can reach 99.6%.

  • Chemical Leaching Plant For High Purity Quartz

    . acid leaching, solvent extraction, and chemical . in most plants of China and the purity of . with high purity from sulfuric acid leach solution . Get Price And Support Online Purity

  • CN102070198A - Method for preparing high-purity manganese ...

    The invention discloses a method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron. The method comprises the following steps of: performing reduction leaching on the pyrolusite with the scrap iron in a sulfuric acid medium to obtain manganese, regulating the pH value to be 5-6 by using a neutralization method ...

  • Process Optimization to Prepare High-purity Amorphous ...

    acid leaching, it was necessary to supply a suitable amount of air to completely combust organics; for example it ... amorphous structured silica. High-purity amorphous silica materials with 99% or more purity were prepared from rice husks by applying the citric acid leaching treatment and burning process at

  • 3 ELECTROLYTIC CHROMIUM-METAL PRODUCTION High-Purity ...

    The previous chapter focused on the use of high-purity chromium metal for high-performance alloys in jet-engine applications. Technical emphasis in this chapter focuses on the two main variations of the electrolytic process that have traditionally produced high-purity chromium metal: the trivalent chrome-alum electrolyte method and the chromic-acid electrolyte method.

  • The Effect of Sulphuric Acid Concentration on the Removal ...

    The leaching of C FA using sulphuric acid results in a silicon -rich solid residue, which can be purified to produce silica or silica -related products . Extracting silicon from CFA for the synthesis of silica products of high purity will thus

  • Leaching of the arsenopyrite/pyrite flotation concentrates ...

    All leaching solutions were prepared using analytical grade reagents of hydrochloric acid, ferrous sulphate hepta-hydrate and potassium dichromate diluted with distilled water and where necessary, deoxygenated with high purity nitrogen. The experimental setup is detailed in Mahlangu et al. (2006). Reductive leaching

  • Selective leaching of nickel from prereduced limonitic ...

    the extent of reduction. The purity of oxygen gas was 99.6%. All other reagents were of analytical purity. 2.2 Acid Leaching of Calcine The atmospheric leaching was conducted in a two-liter seven-necks flask heated by electric heating plate. The stirrer shaft and central neck of the flask were assembled with a mercury seal to minimize the

  • A novel technique for microcrystalline graphite ...

    Alkali-acid leaching process could enhance the carbon content of microcrystalline graphite to a higher level than the traditional method of alkali roasting-acid leaching process. KEYWORDS: Alkali-acid leaching , high-purity graphite , microcrystalline graphite

  • Characterization of Silica Produced from Rice Husk Ash ...

    and high purity silica was obtained with acid leaching with HCl. Riveros4 To optimize the production of silica from rice husk. • Washing rice husk with water • Acid leaching • Incineration • Leaching of RHA Silica with approximate purity of 99.98% with three washing cycles, 6-h acid leaching, 6 leaching cycles with HCl 3% at 90ºC, and ...

  • Research on Enrichment of P2O5 from Low-Grade Carbonaceous ...

    Organic acid leaching is supposed to be very selective, environmentally friendly, and is able to generate products of high purity. However, the performance of this approach has not been comprehensively assessed by experimental studies, and hence its economic feasibility is not well understood.