The work presents a study of the preparation of synthetic rutile from the reduced ilmenite through the aeration leaching process. The effects of hydrochloric acid and anthraquinone-based redox catalyst on the improving the efficiency of the aeration stage were …
Ilmenite (FeTiO 3) is one of the most abundant mineral in nature and a major raw material which is used commercially for the manufacture of titanium products, besides rutile, anatase and leucoxene.Ilmenite generally occurs in heavy minerals sands as placer deposits. Due to the high demand of TiO 2 and rapid development of the titanium industry, gradual …
In the selective leaching of calcareous material, Zafar et al. (1996a) found that the formic acid could be a promising leaching agent for beneficiation of low-grade phosphate rock depending on reaction conditions as well as the nature and size of the particles.
Pretreatment of ilmenite are required to enhance leaching efficiency of ilmenite. Strong acid leaching is promising in terms of the purity of the produced TiO2, low energy …
The beneficiation of titania (TiO 2) by sulfuric acid (H 2 SO 4) pressure leaching of Panzhihua ilmenite was investigated. The reaction temperature, H 2 SO 4 concentration, and concentration of ferrous ions (Fe 2 +) had significant effects on the enrichment of TiO 2.With increasing reaction temperatures, the dissolution of iron from ilmenite was enhanced, while …
Alkali roasting followed by leaching is one of the routes for recovery of rare earths in primary sources and secondary sources which has been performed by many groups (Jha et al., 2016). Roasting the ilmenite ore with alkali followed by aqueous leaching, 80% of rare earth oxides from the mineral matrix can be liberated (Lahiri and Jha, 2009).
The Panxi Area in Sichuan Province of China is one of the largest ilmenite concentration reserves over the world with an estimated ilmenite concentration reserve of about 870 million tons, which accounts for more than 90 wt.% of the total resource of China and over 35 wt.% of the world (Wu et al., 2011).Unlike the sand ilmenite, the Panxi ilmenite concentration …
A leaching exploration test shows that the TiO2 grade of the flotation concentrate can be improved to 53.90%. XRD analyses reveal that the ilmenite in the VTM ore is converted into anatase and rutile during the …
About 95% of titanium ore is processed to obtain pigment-grade titanium dioxide. The main titanium-bearing minerals used for this purpose are ilmenite (FeTiO3) and rutile (TiO2). Anatase, a low-temperature polymorph of rutile, is currently not used as a raw material for this purpose due to its large amount of impurities, making it unsuitable for conventional chloride …
Leaching of ilmenite in HCl is known to remove many impurities from ilmenite producing less contaminated TiO 2 while high acid concentrations are found to corrode the …
This paper examines the effectiveness of the method for producing synthetic rutile from ilmenite through pre-oxidation and reductive leaching of pre-oxidized ilmenite in …
Naturally available ilmenite mineral is being used as a starting material to produce titanium based products that have wide applications. Transformation of ilmenite to different titanium based materials by strong and weak acid, and base digestion, is discussed. Effects of temperature, concentration of acid/base, reaction time on dissolution of ilmenite are …
DOI: 10.1016/J.HYDROMET.2014.09.016 Corpus ID: 95471349; Beneficiation of titania by sulfuric acid pressure leaching of Panzhihua ilmenite @article{Jia2014BeneficiationOT, title={Beneficiation of titania by sulfuric acid pressure leaching of Panzhihua ilmenite}, author={Linie Jia and Bin Liang and Li L{"u} and Shaojun Yuan and Li-rong Zheng and …
This paper describes a novel process for preparation of synthetic rutile using an intermediate, sulfated ilmenite from the sulfate TiO 2 process as the feedstock.The synthetic rutile can be obtained by selective thermal decomposition of the sulfated ilmenite, followed by targeted leaching for removal of various impurities.The results of the decomposition unit …
3. Analysis methods and process chemistry3.1.. Analysis methodsIn the most of leaching investigations, the phosphate rock samples were crushed and then sieved to collect various size fractions for analysis of combined water and organic matter, P 2 O 5 content, CO 2 content or loss on ignition (LOI) and acid insoluble residue (AIR). In the leaching experiments, …
The exploration and utilization of lunar resources have become the major objectives of future lunar exploration missions. The classified collection and processing of lunar minerals is the basic prerequisite for the in-situ exploration and utilization of lunar resources. In this study, we propose a scheme for in-situ separation of magnetic minerals from lunar soils …
Semantic Scholar extracted view of "The Alkali Roasting and Leaching of Ilmenite Minerals for the Extraction of High Purity Synthetic Rutile and Rare‐Earth Oxides" by A. Jha et al. ... over existing processes is that it minimises waste and energy consumption compared with the current methods for the beneficiation of titaniferous minerals ...
Titanium-bearing blast furnace slag (TBFS) is formed during the smelting of vanadium–titanium magnetite ore, containing more than 10 wt % Ti. The metal resource in TBFS has not yet been utilized because of the difficulty of extracting the objective phase from the complex eutectic. In this work, thermodynamic and experimental studies of selective leaching …
This paper examines the effectiveness of the method for producing synthetic rutile from ilmenite through pre-oxidation and reductive leaching of pre-oxidized ilmenite in …
The influence of acid surface dissolution as a pretreatment method on the improvement of ilmenite selective flotation from olivine-pyroxene was studied by carrying out the flotation experiments in micro and laboratory (flotation cell) scales. The microflotation experiments show that after surface dissolution, the flotation recovery of ilmenite improves from 73.5% to …
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This paper describes a novel, facile chemical pathway for preparing synthetic rutile from ilmenite. The pathway consists of two primary units, i.e., selectively sulfating ilmenite, which was realized via roasting ilmenite with (NH 4) 2 SO 4 followed by selective thermal decomposition of the sulfated ilmenite, and targeted leaching of the impurities. The effects of …
Studies on continuous and selective chlorination by using ilmenite have been actively conducted because the efficient removal of FeO from ilmenite (FeTiO 3) ore using …
Mussapyrova et al. studied selective leaching behaviors of Cu to Zn from mechanically activated Cu smelting slag. 23 The results indicated that Cu leaching could be improved to 87.3% via mechanical activation, and the maximum selectivity of Cu to Zn reached 97.9 using H 2 SO 4 and K 2 Cr 2 O 7. The Cu selectivity was attributed to the better ...
An ilmenite ore may be beneficiated by oxidation to yield a pseudobrookite-containing material, reduction of the oxidation product to give a material having at least 4% of its iron content in the ferric state, and leaching of the reduced material. Leaching is facilitated by the previous two steps. The beneficiate is suitable for chlorination under fluidised-bed reaction conditions to …
Feed material was prepared from massive Allard Lake Ilmenite ore; and the effects of feed size, temperature, hydrochloric acid solids on the leaching rate were studied.
The second-generation leaching process involves the coexistence of pool and heap leaching using 1 %–4% (NH 4) 2 SO 4 as the leaching agent. Heap leaching involves directly piling up mined ore and injecting the solution for leaching. Reagent consumption is reduced and soil environmental pollution is avoided owing to the low leachant concentration.
The selective activation effect of ilmenite and titanaugite in the PMS-Fe 2+ system was demonstrated by micro-flotation tests. ... of a titanium beneficiation plant located in Panzhihua, Sichuan, China. ... As opposed to ilmenite, the leaching amounts of Ca 2+ and Mg 2+ on the titanaugite surface significantly increased to 15.80 mg/L and 2.38 ...
In this work, a complete beneficiation technical route combining physical and chemical methods, namely a roasting-flotation-leaching scheme, is proposed to produce a qualified grade Ti-concentrate from altered Vanadium titanomagnetite (VTM) ore. Based on the character of the ore sample, it is recommended to recover the Ti-bearing minerals, ilmenite …
Beneficiation of titaniferous ores by selective separation of iron oxide, impurities and rare earth oxides for the production of high grade synthetic rutile A. Jha, A. Lahiri, and E. J. Kumari View all authors and affiliations
Becher, R. G. 1963. An improved process for the beneficiation of ores. containing contaminating iron, Australian Patent 247,110, 1963. ... Acid leaching of ilmenite (FeTiO3) obtained from beach ...
In the context of titanium leaching, sulfuric acid or hydrochloric acid is commonly employed for extracting titanium from minerals like ilmenite and rutile under optimal leaching conditions, as outlined in studies by Xiong et al.; Haverkamp et al.; Li et al.; Zhao et al.; Nguyen and Lee & Ahn and Lee [12, 27,28,29,30,31]. Organic acids, such as ...
DOI: 10.1016/J.HYDROMET.2003.08.001 Corpus ID: 95574087; Reductive leaching of ilmenite ore in hydrochloric acid for preparation of synthetic rutile @article{Mahmoud2004ReductiveLO, title={Reductive leaching of ilmenite ore in hydrochloric acid for preparation of synthetic rutile}, author={Mohamed H. H. Mahmoud and Ahmed A. Afifi …
In the present paper, the complex Rosetta beach ilmenite concentrate was subjected to HCl leaching under normal and reducing medium. The purpose was to …
leaching process is limited because HCl corrodes the production equip-ment, despite the advantages of the process including high efficiency, easy regeneration, and recyclability of HCl. The H 2SO 4 leaching process is less efficient in removing impurities from ilmenite than the HCl leaching process. However, the H 2SO 4 waste discharged from ...
Leaching of titanium and iron from ilmenite with hydrochloric acid – – Hydrochloric acid: 60–80 °C: 49 (for Ti) 54 (for Fe) (Tsuchida et al., 1982) Leaching of ilmenite in H 2 SO 4 system – S/L ratio of 1/100: titanium(III) ions, sulfur dioxide and 450–600 g/L H 2 SO 4: 85–100 °C: 75 and 90 (Zhang and Nicol, 2010)
