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  • Red mud Wikipedia

    Red mud, also known as bauxite residue, is an industrial waste generated during the refinement of bauxite into alumina using the Bayer process.It is composed of various oxide compounds, including the iron oxides which give its red color. Over 95% of the alumina produced globally is through the Bayer process; for every tonne of alumina produced, approximately 1 to 1.5 tonnes of red mud are also

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  • The composition, recycling and utilisation of Bayer red mud

    Feb 01, 2019· Red mud or bauxite residue is a solid waste generated from the Bayer process. The disposal of red mud leads to a serious environmental threat because of its tiny particle size and high alkaline value. The utilisation and recycling of red mud is currently a crucial issue and needs to be addressed as soon as possible.

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  • WO1996011737A1 Red mud dewatering and washing process

    In a red mud dewatering/filtering and washing process, optionally with admixture of sand, in particular for red mud from a Bayer process for extracting aluminium from bauxite, filters are used and the lye deposited on the filters is washed out. The process is mainly characterised in that washing and dewatering are carried out under an overpressure, bound lye is regenerated and a residue with a

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  • Disposal Red Mud Project

    The title of the patent is “Treatment and disposal of red mud generated in the Bayer Process”, AU701874. The inventors propose a process that produces a RM cake low in caustic and alumina concentration permitting environmentally friendly disposal. Quite recently, the Virotec International Ltd. (Australia), announcened a treatment process

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  • Bayer Process Plants Noranda Alumina

    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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  • Production Red Mud Project

    Jul 13, 2005· Red Mud is produced during the Bayer Process. With this process, we can extract the aluminum (oxy)hydroxides from bauxites and get alumina, which eventually can be smelted and give aluminum. Bayer Process . In 1888, Karl Josef Bayer developed and patented a process, which has become the cornerstone of the aluminium production industry worldwide.

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  • Calcite in the mud washing circuit of the Bayer process

    In the mud circuit of the Bayer process, alumina losses may be reduced via the inhibitive action of calcium ions on gibbsite precipitation. Here, we present the first stage of this investigation

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  • 4. EXISTING WAGERUP REFINERY 4.1 ALUMINA REFINING

    Wagerup refinery uses the Bayer process to refine alumina from bauxite ore. This involves a number of key steps, including: Approximately halfway through the mud washing process the overflow stream is heated and (red mud) as a soil amendment within the Peel-Harvey

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  • Bayer process Wikipedia

    The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be purified before it can be refined to aluminium metal.

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  • Bayer Process: Manufacturing Of Alumina Making of Alumina

    The Bayer Process: Alumina is the main components of bauxite, so bauxite is refined in order to produce Alumina. The Bayer process is the principal way for producing alumina by refining Bauxite. Bauxite other than with 30-60percentage of aluminium oxide contains mixture of silica, iron oxides and titanium dioxide.

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  • Red Mud: The Next Tool in Water Treatment?

    Conclusion. Red mud, a process by-product of the Bayer process, continues to be an industry challenge and an environmental risk. Paired with the increasing need for higher quality water, a growing body of research around the use of red mud as an adsorbent

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  • Production Red Mud Project

    Jul 13, 2005· Red Mud is produced during the Bayer Process. With this process, we can extract the aluminum (oxy)hydroxides from bauxites and get alumina, which eventually can be smelted and give aluminum. Bayer Process . In 1888, Karl Josef Bayer developed and patented a process, which has become the cornerstone of the aluminium production industry worldwide.

    Details >
  • Bayer Process an overview ScienceDirect Topics

    Red Mud is a by-product produced during the Bayer process of refining of bauxite to produce aluminum (2 tons of red mud remains after production of 1 ton of aluminum). 58 It contains metallic oxides. 58 The red color results from iron oxide (~60% of its mass). 58 The massive quantities generated trigger efforts of finding suitable uses for red mud.

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  • Red Mud Flocculants Used in the Bayer Process SpringerLink

    Abstract. Flocculation and separation of red mud is an integral part of the Bayer process. Over the latter half of the 20 th century, flocculant technology dramatically changed from natural starches to use of “rationally designed” polymers. Many of these advancements were due to the introduction of liquid or emulsion based flocculants which enabled elaborate post-reaction chemistry to be

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  • Polymers for flocculating red mud from bayer process

    The red mud slurries that were evaluated were synthesized to correspond generally to red mud slurries that resembled either the red mud slurries found in the Bayer process settlers (308 g/L NaOH concentration) or in the washer train (50 g/L NaOH concentration). The

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  • Calcite in the mud washing circuit of the Bayer process

    In the mud circuit of the Bayer process, alumina losses may be reduced via the inhibitive action of calcium ions on gibbsite precipitation. Here, we present the first stage of this investigation

    Details >
  • Recovery of Al2O3, Fe2O3 and TiO2 from Bauxite Processing

    Red mud (RM) is a fine-textured residue from bauxite refining by the Bayer process that therein using from bauxite digestion with sodium hydroxide at elevated temperature and pressure for alumina production. Under normal conditionsabout 1–2 tons of red mud residues (dry weight) are generated for a ton of alumina produced.

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  • 4. EXISTING WAGERUP REFINERY 4.1 ALUMINA REFINING

    Wagerup refinery uses the Bayer process to refine alumina from bauxite ore. This involves a number of key steps, including: Approximately halfway through the mud washing process the overflow stream is heated and (red mud) as a soil amendment within the Peel-Harvey

    Details >
  • Bayer process Wikipedia

    The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer.Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al 2 O 3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be purified before it can be refined to

    Details >
  • Bayer Process: Manufacturing Of Alumina Making of Alumina

    The Bayer Process: Alumina is the main components of bauxite, so bauxite is refined in order to produce Alumina. The Bayer process is the principal way for producing alumina by refining Bauxite. Bauxite other than with 30-60percentage of aluminium oxide contains mixture of silica, iron oxides and titanium dioxide.

    Details >
  • Alumina: Filtration in the alumina production process

    Jun 18, 2010· Filtration in the process red mud. In most circumstances, plants use vacuum filters, usually drum filters, for the final washing and de-liquoring of red mud before it is sent to a waste area. In this process, the solids are waste and the liquor valuable.

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  • Process Options for the Filtration and Washing

    loss of extractable alumina in settlers and red mud washers minimized to. 0.5 1 % . ground bauxite. pregnant liquor with. T ≈ 145°C. p ≈ 4 bar. solids. red mud washing. red mud washing. red mud washing. ca. 2 % loss of extractable alumina (gibbsite) in the settlers. ca. 2 % loss . of extractable alumina (gibbsite) during red mud washing

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  • Feasibility of red mud neutralization with seawater using

    improved the physical characteristics of red mud with entrained liquor becoming non-hazardous water with reduced alkalinity. The results would be extremely useful in the process of safe disposal of red mud. Keywords Bauxite residue pH Red mud Seawater neutralization Taguchi method Introduction The Bayer process of extraction of alumina from bauxite

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  • Utilization of red mud for extraction of alumina

    Red mud is a hazardous waste generated at the end of the Bayer process for alumina production from bauxite. If not managed properly, red mud imposes serious threats to the environment and public

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