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The stream samples were leached in 1-wt-pct-HCl solution to obtain stable samples of leach liquor for chemical analyses. Liquor from water leaching exhibited a tendency to form precipitates before being analyzed owing to hydrolysis reactions. It was necessary to acidify the liquor samples of water leaching to prevent precipitates from …
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A block diagram of the procedure for uranium and lanthanides extraction from acidic leach liquor has been proposed. ... power plant [1]. ... magnetite, and/or ilmenite) in a gangue made up of ...
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Ultimately, the leach liquor was used to precipitate Li at the determined optimal conditions, and the Li precipitation efficiency reached 91.0%. This study provided an innovative strategy for separating Li from the alkali leach liquor of Li concentrate without adding any reagents.
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Spent leach liquor produced from leaching ilmenite in hydrochloric acid must be converted to acid for synthetic rutile to be produced economically. There are several possible process routes for the regeneration of hydrochloric acid, but commercially, the most popular is by pyrohydrolysis, and the EARS system is based on this process.
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The pre-leach thermal treatment converts most of the contained iron back to the ferrous state, and transforms the pseudorutile phase, Fe 2 Ti 3 O 9, i.e., Fe 2 O 3.3TiO 2 (JCPDS-ICDD card # 47-1777), to crystalline ilmenite and rutile. The treatment consisted of roasting in air at 950°C for 30 min, then reducing in hydrogen at 850°C for 15 min, …
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Several alternatives were reported for upgradation of uranium content in lean leach liquors by different workers for various ores. The studies of Sreenivas and Rajan, 2013, Sole et al., 2011, Zaganiauis, 2009 are mainly on ion exchange (IX) based options. However, presence of very high concentration of dissolved solutes in the leach liquor of …
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Brass ash from the industrial brass manufacturer in Turkey was leached using the solutions of ionic liquid (IL) 1-butyl-3-methyl-imidazolium hydrogen sulfate ([bmim]HSO4) at ambient pressure in ...
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Question: o) A pilot plant is set up to treat copper leach liquor by solvent extraction prior to electrowinning. The copper leach liquor containing 1 g/L of Cu2+,3 g/LFe3+ at pH2.2, is subjected to countercurrent solvent extraction using LIX 64 dissolved in kerosene. The organic solvent feed is assumed to be barren i.e. a fresh solvent feed and ...
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Direct recovery of nickel and cobalt from a synthetic solution representing a nickel HPAL laterite leach liquor after iron, aluminium, and chromium removal was tested using the V10/Nicksyn™ system. Nicksyn™ is now commercially available, and hence a very attractive option to be considered for HPAL leach liquor. Feed solution
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Utilization of Roast-Reduced Ilmenite Leach Liquor for Ferrous Chloride Production by Hydrothermal Process. S. Prasad Manoj Kumar. Environmental Science, Engineering. Transactions of the Indian Institute of Metals. 2020; Ilmenite is the most abundant mineral for the extraction of titanium. It contains more than 50% TiO 2 along …
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The composition of the obtained acidic leach liquor of red mud was listed in Table 4. 0.58 mol.L −1 Cyanex923 was used as organic phase to extract Ti(IV) ... (IV) using thiphophinic acids and its recovery from ilmenite and red mud. Sep. Sci. Technol., 36 (2001), pp. 671-685, 10.1081/SS-100102953. View in Scopus Google Scholar
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Liquid–liquid extraction of iron and titanium from the ilmenite sulphate leach liquor was carried out with D2EHPA in dodecane (Silva et al., 2008) followed by selective stripping of iron from the organic phase with 4.5 pH H 2 SO 4 and stripping of Ti from the Fe-free organic with an aqueous fluoride solution at pH 4.5.
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In the present study, the feasibility of extraction of titanium from simulated ilmenite sulfuric acid leach liquor with TRPO was investigated. The separation of …
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The production of pigment grade titanium dioxide involves leaching of ilmenite with acids that also results in the formation of ferrous sulfate/chloride. Usually the ferrous salts are sprayroasted to regenerate the sulfuric acid/hydrochloric acid for recycling. However, the quantities of ferrous leach liquor and the capital cost of the regeneration plant dictate …
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leach liquor decreased slightly as the polymerization (as. shown in Table III). Therefore, it makes sense to use a ... Ilmenite ore is an important Ti-bearing raw material for titania pigment and ...
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The purified leach liquor – a slightly yellow to colourless liquid – was used as feed solution in the spray roast pilot plant at a feed rate of 40-70 L/h over a period of 3 weeks. The pilot ...
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The Vieille Montagne technique as described by Andr6 and Masson (1973) was simulated by using liquors containing ferrous iron only in the precipita- tion vessel …
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Results are presented of laboratory-scale experiments designed to evaluate a solvent extraction process for recovering titanium from the liquor produced in the sulphuric acid leach of a titaniferous magnetite. The solvent extraction of titanium was optimized in batch tests using 10 vol.% tri-n-octylphosphine oxide (TOPO) in the aliphatic diluent …
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The purity of the obtained titanium solution was average of 80% from a H 2 SO 4 leach liquor. However, the study by Sole et al. also reveals that there are many …
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Semantic Scholar extracted view of "Recovery of titanium from the leach liquors of titaniferous magnetites by solvent extraction. Part 2. Laboratory-scale studies" by K. C. Sole ... Solvent extraction of titanium from the simulated ilmenite sulfuric acid leachate by trialkylphosphine oxide. ... Synthesis of TiO2 nano-powders prepared from ...
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o) A pilot plant is set up to treat copper leach liquor by solvent extraction prior to electrowinning. The copper leach liquor containing 1 g / L of Cu 2 +, 3 g / L Fe 3 + at pH 2.2, is subjected to countercurrent solvent extraction using LIX 64 dissolved in kerosene.The organic solvent feed is assumed to be barren i.e. a fresh solvent feed and …
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2.Separation of leach liquor:- In this step, the solution i.e. leach liquor is separated from solid residues by one of the methods of material separation. ex: settling, thickening, filtration etc. 3.Recovery of metal from the leach liquor:-The metal in the elemental form is obtained in the recovery step.
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Download scientific diagram | The chemical analysis of the leach liquor before and after 10 minutes of iron powder addition from publication: Reductive Leaching of Ilmenite Ore in Hydrochloric ...
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With reference to the flow sheet of FIG. 1, in a Stage 1 Leach step ilmenite, leach liquor containing between 400 and 700 g/l sulfuric acid from a Stage 2 Leach step, ... A single stage leach pilot plant was assembled, consisting of 5 stirred FRP tanks of 10 L capacity each, equipped with FRP double axial turbines, and silica jacketed electric ...
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The leach liquor at optimal leaching conditions was accordingly treated to obtain pure aluminium solution which was further beneficiated to obtain high-grade alumina (α-Al 2 O 3 ) of industrial ...
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In 1960, Welt and Smutz used tributylamine (TBA) and di-n-octylamine (DOA) solvents for the recovery of uranium and thorium from Egyptian monazite sulfate leach liquor. Gupta et al. in 2002 reported the use of Cyanex 923 for uranium, thorium and lanthanides (Ce, Y) from the digested leach solution of monazite in HNO 3 with HF and …
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vanadium from the sulfate leach liquor, the influence of different D2EHPA to Cyanex 272 ratios, various temperatures such as 25, 35, 45, and 55°C were studied. As a result, optimum separation of
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Copper is to be recovered from a filtered leach liquor by ion exchange using Lewatit S100, a sulphonated polystyrene resin cross linked with 8% divinyl benzene. ... (no calculations) how to optimize the design of IX plant. NB resin is expensive. The following equilibrium data apply :( units of concentration as above) Resin (g/l) Solution (ppm ...
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literature on the comparison of flowsheet options for the post-leach part of the plant is discussed in this section. Important factors influencing flowsheet or technology selection include (2): • Uranium concentration in the leach liquor. • Leach liquor acid concentration / pH. • Temperature of the leach liquor. • Volumetric flow rate.
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Established Conditions with Dump Leach Liquor. Liquor obtained from a copper-waste dump leaching operation was used as feed for multiple-cycle tests. The dump leach liquor contained minor amounts of calcium, manganese, phosphate, copper, sodium, and uranium in addition to aluminum, magnesium, and iron. The composition is shown in …
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Finally, solvent extraction by tributyl phosphate (TBP) was performed on the leach liquor to separate dissolved Fe (the major impurity) from Ti, which led to 83% extraction recovery …
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Rare-earth elements (REEs) are required for use in modern high-tech applications and demand has increased significantly over the last decade. 1 However, processing of REE ores poses potential hazards to human health and the environment due to challenges in the management of thorium (Th) and uranium (U) in waste products. 2 If …
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Later studies examined the feasibility of using D2EHPA to recover titanium from iron in the treatment of ilmenite leach liquors [27]. Titanium was optimally extracted at pH 0.9, although some iron was co-extracted. ... The species distribution of the leach liquor is of prime importance. Control of pH to prevent precipitation of iron species is ...
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