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Red mud is the tailings generated from the production process of aluminum industry and is mainly stacked in open-air at present, so how to ensure the stability of red mud stockpile is very important. Regarding mud stockpile of Guizhou Aluminum Factory as the research object, this paper studies the physical and mechanical properties of Bayer red mud from wetting process, Bayer red mud from
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30.05.2011· Bayer red mud (RM) is a solid waste produced during the process of extracting alumina from bauxite. Producing 1 tonne of alumina generates 1–1.5 tonnes of RM, depending on the quality of the source bauxite and the efficiency of the alumina extraction processes. It is standard practice to store this RM on land near the alumina refinery.
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22.05.2020· In the Bayer's process of extracting alumina from bauxite using caustic soda, the waste generated is called as red mud/bauxite residue. About 1–2.5 tonne of bauxite residue is generated per tonne of alumina produced depending upon the bauxite and process conditions used.
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12.05.2016· The technical field of the present invention refers to the transformation of bauxite and red mud, which is a by-product resulting from the Bayer process for the alumina extraction, for economic and ecological purposes. As it is known, the most used industrial process in order to obtain alumina from bauxite, is named Bayer process.
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1. A Bayer alumina recovery process in which bauxite is digested in an alkaline liquor and the resultant red mud is separated from the digestion liquor and is then washed in a plurality of sequential wash stages comprising a first wash stage and one or more intermediate wash stages in each of which the red mud is washed with a wash liquor from a later wash stage, flocculated with a
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The components of bauxite which react with caustic and lime to form insoluble compounds and those components that do not dissolve, are called "red mud", and are separated from the alumina rich liquor in clarification by a settling/decantation process followed by countercurrent washing to recover the caustic and alumina values.
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12.05.2016· The technical field of the present invention refers to the transformation of bauxite and red mud, which is a by-product resulting from the Bayer process for the alumina extraction, for economic and ecological purposes. As it is known, the most used industrial process in order to obtain alumina from bauxite, is named Bayer process.
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COMPOSITION AND CHARACTERISTICS OF RED MUD: A CASE STUDY ON TAYAN BAUXITE RESIDUE FROM ALUMINA PROCESSING PLANT AT WEST KALIMANTAN. Bauxite residue emerges as the major waste material during production of alumina from bauxite by the Bayer's process. An alumina refinery built in Tayan, West Kalimantan has a production capacity of 300 thousand
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12.05.2016· The technical field of the present invention refers to the transformation of bauxite and red mud, which is a by-product resulting from the Bayer process for the alumina extraction, for economic and ecological purposes. As it is known, the most used industrial process in order to obtain alumina from bauxite, is named Bayer process.
Get Pricethe Bayer process alumina production (Al 2 O 3) from Bauxite ore which contains high levels of residual alkalinity and toxic heavy metal. Therefore, Red mud is a hazardous waste of alumina industry. The volume of Red mud which generated in the alumina processing plant
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In the Bayer process for producing alumina from bauxite, the efficiency of the red mud separation procedure can be substantially improved if the flocculant (45) normally used is diluted with a clear process liquor (43c) obtained from a prior, the same or a subsequent settling or washing step and mixing this diluted flocculant solution with the red mud slurry (41) to be separated.
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1.12.2014· A complex process for the usage of red mud to achieve zero waste. Valuable products obtained from red mud: CA 2529249 C (2012) Jha et al. (2012) The procedure involved extraction of alumina from different types of bauxite ores and red mud residues and of titanium dioxide from ilmenite.
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18.09.2017· A typical bauxite plant produces one to two times as much red mud as alumina. This ratio is dependent on the type of bauxite used in the refining process and the extraction conditions.
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Red mud, also known as bauxite residue, is an insoluble byproduct generated from the extraction of alumina from bauxite during the Bayer process (Fig. 1),
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In the Bayer process of extraction of alumina from bauxite, the insoluble product generated after bauxite digestion with sodium hydroxide at elevated temperature and pressure is known as 'red mud' or 'bauxite residue'. This alumina refinery waste is highly alkaline in nature with a pH of 10.5-12.5 and is conventionally disposed of in mostly clay-lined land-based impoundments.
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Red mud, also known as bauxite residue, is an insoluble byproduct generated from the extraction of alumina from bauxite during the Bayer process (Fig. 1),
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help of acids for the sake of extracting REEs [2, 8–10]. Iron removal studies from bauxite residue can be clas-sified into two major approaches: (1) solid-state reduction and (2) smelting. In a solid-state reduction process, bauxite residue is reduced with a solid or gaseous reductant, resulting in the formation of Fe 3O 4 or metallic iron which
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Red mud is the waste which is generated in the process of extracting alumina from bauxite. In this paper, results showed that aerated concrete preparated with red mud, fly ash and other solid industrial waste, its strength can reach 2.5 ~ 5.5MPa, density of 550 ~ 800kg/m3, radioactive limit meet the requirement of material to the wall. Use of red mud to produce aerated concrete is an effective
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the Bayer process alumina production (Al 2 O 3) from Bauxite ore which contains high levels of residual alkalinity and toxic heavy metal. Therefore, Red mud is a hazardous waste of alumina industry. The volume of Red mud which generated in the alumina processing plant
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The invention relates to ferrous metallurgy, namely the recovery of valuable components of scandium from the intermediate products of the refining of bauxite to alumina - specialnyh dust precipitator or red mud. The method for extracting scandium from the red mud of alumina production (L. F. Borisenko, L. M. Gelitin, N. With. Palacasino.
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