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This paper presents a novel approach (Figure1) for the utilization of red mud through the combination of carbothermic reduction and high-pressure autoclave leaching to recover …
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Apart from pyrometallurgical process, many efforts have been carried out on different types of acids to extract titanium dioxide from red mud. In case of sulfuric acid leaching process ( Mehta and Patel, 1951, Şayan and Bayramoǧlu, 2000 ), the recovery of the titania can be achieved by taking advantage of formation of RSO 4 ·Ti(SO 4 ) 2 ...
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Considering the limitations of the Bayer process, increasing demand on energy in the aluminium industry and tighter environmental regulations related to the disposal of red mud, the results from the alkali-based roasting process for the extraction of alumina from red mud and bauxite are described in section 7.3.3. 5. Extraction of titanium dioxide
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Download Citation | On Aug 26, 2014, D. Swarup and others published Extraction of Titanium dioxide from Red Mud | Find, read and cite all the research you need on ResearchGate
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Semantic Scholar extracted view of "Comprehensive examination of acid leaching behaviour of mineral phases from red mud: Recovery of Fe, Al, Ti, and Si" by R. A. Pepper et al. ... In this study the extraction of titanium from bauxite residue (red mud) with 2 step acid leaching was proposed. ... Enrichment of titanium dioxide in red mud: a ...
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Note that the Ti-rich product serves as a high-quality raw material for titanium dioxide production ... 378.0 μ g/g), facilitating the subsequent extraction of Sc and manufacture of iron-red pigments, in addition to other applications. ... Process optimization for integrated mineralization of carbon dioxide and metal recovery of red mud. J ...
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Red mud (RM) is a waste generated from Bayer process to extract alumina at an approximately rate of 0.8–1.5 tons per ton of alumina produced, and reaches about 120 million tons/a in the world (Zhang et al., 2011; Zhu et al., 2015).As main disposal of the red mud stacking or landfill not only does certain harm to the natural environment, but also wastes precious …
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the mixture of red mud and soft coal prior to direct reduction. A recovery of 95.7% of Fe was achieved after grinding, sintering and magnetic separation. Through the simultaneous metals recovery route, Liu et al.25 used a soda-lime reductive roasting process prior to leaching and magnetic separation of the fine red mud (< 75 µm).
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Silica and Al 2 O 3 were recovered from the remaining aqueous solution, while the organic extract was stripped with 10% Na 2 CO 3 solution, finally hydrolysed and calcined to …
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This study focuses on the extraction of titanium from red mud and in particular the mineralogical changes, induced by leaching. Sulfuric acid, hydrochloric acid and their ... titanium dioxide is commonly used as white pigment in numerous fields of industry such as, dyes, plastics or even eatables and drugs [6,7].
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The following types of titanium secondary resources are mainly available: sponge titanium production, the production of titanium ingot, titanium dioxide production, red mud, titanium-bearing blast furnace slag, spent SCR catalyst, and lithium titanate waste.
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They include a long-term sequestration of carbon dioxide in the air and modified physical and chemical properties of red muds. ... This study focuses on the extraction of titanium from red mud and ...
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PDF | Extraction,Titanium dioxide, Building brick, Red mud | Find, read and cite all the research you need on ResearchGate
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Sulfuric acid is the most applicable acid for hydrometallurgical extraction of titanium dioxide from red mud because titanium dioxide can react with sulfuric acid to produce soluble TiOSO 4 (Zou ...
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Since the pre-reduced sample was smelted at 1600℃ for 60 min, 93.60 wt% of the iron element in red mud can be recycled in the form of iron nugget with grade of 99.6 wt%. Titanium in red mud can be recycled as Ti-rich slag, with TiO 2 content of 55.91 wt%, for titanium dioxide production. The FeO in slag also suppressed the side reactions (i.e ...
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The material balance indicates that acid baking of 1 kg red mud containing 0.094 kg titanium and 60 g t⁻¹ scandium yielded 0.27 kg residue containing 0.12 kg iron, 0.026 kg titanium, and <10 g ...
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PDF | On Jan 1, 1991, B.K.Padhi and others published Extraction of titania from red mud | Find, read and cite all the research you need on ResearchGate ... Extraction,Titanium dioxide, Building ...
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DOI: 10.1016/j.seppur.2023.123882 Corpus ID: 258271432; Separation and recovery of titanium and scandium from the red mud @article{Habibi2023SeparationAR, title={Separation and recovery of titanium and scandium from the red mud}, author={Hossein Habibi and Mohammad Mokmeli and Sina Shakibania and Dorna Piruzian and Ziaeddin Pourkarimi}, …
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Titanium is a rare metal that is dispersed and difficult to extract in nature. Due to its excellent properties such as corrosion resistance and high strength-to-weight ratio, titanium has been widely used in various fields, including aerospace industry, shipbuilding industry, and chemical industry. 1, 2 Scandium is one of the most expensive rare-earth elements widely used …
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The red mud was calcined in reducing atmosphere at 800–900 °C and chlorinated at 500 °C to obtain chloride of alumina [13]. Ercag and Apak mixed the red mud with dolomite and coke, pelletized and sintered the mixture at 1100 °C, and finally smelted it at 1550 °C to produce pig iron and a slag containing titanium [14].
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Turkish red mud (bauxite waste) has been mixed with dolomite and coke, pelletized and sintered at 1100°C, and finally smelted at 1550°C to produce pig iron and a slag. ... Silica and Al 2 O 3 were recovered from the remaining aqueous solution, while the organic extract was stripped with 10% Na 2 CO 3 solution, ... The titanium recovery ...
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Red mud (RM), also known as bauxite residue, is an alkaline industrial solid waste derived during the Bayer process for extracting alumina from bauxite ores (Borra et al., 2016).Generally, the production of 1 ton of alumina generates approximately 1–1.5 tons of RM depending on the raw material quality and process parameters (Taneez and Hurel, 2019; …
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While red mud is a major problem, it also contains a variety of metals that could be extracted. Some estimates say that red mud can contain as much as 64% Iron oxide (Fe 2 O 3), 43% aluminum oxide (Al 2 O 3), and 24% titanium dioxide (TiO 2),² though it's important to note that the composition of red mud varies significantly across sources.
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Bauxite residue, known as red mud, is a by-product of alumina production using the Bayer process. Currently, its total global storage amounts to over 4.6 billion tons, including about 600 million tons in Russia. The total global storage of red mud occupies large areas, leading to environmental damage and increasing environmental risks. Moreover, it contains a significant …
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(1945). Extraction of Titanium dioxide from Red Mud. Transactions of the Indian Ceramic Society: Vol. 4, No. 2, pp. 75-80.
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1. Introduction. Red mud (RM) is a high alkaline industrial solid noxious waste produced from the extraction of alumina from bauxite. It is called RM because it contains iron oxide and looks similar to the red soil. 1 In addition, its long-term storage poses a potential threat to the environment. With the rapid development of the alumina industry, the strong alkalinity of …
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In this paper, the current research status of the recovery of scandium and titanium in red mud at home and abroad was reviewed, and the problems of each process were pointed …
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Red mud is a strong basicity solid waste residue of the digestion of bauxite ores with caustic soda for alumina production. This paper gives a overview of the basic characteristics of red mud and also puts great emphasis on the recycling technologies both at home and abroad, which mainly deal with those valuable metals come from red mud, such ...
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The chemical curing mechanism of modified red mud-based stabilized soil includes hydration reaction, pozzolanic reaction, promotion effect of nano-SiO2, and enhancement effect of gypsum.
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Alkali oxides and metal hydroxides react with carbonic acid formed by the bubbling of carbon dioxide in red-mud slurry to give respective carbonates and bicarbonates which are neutral in nature and 17066 Agrawal et al. / Materials Today: Proceedings 5 (2018) 17064â€"17072 reduce the pH value of the substrate.
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