formation of bauxite slurry

  • LONG-DISTANCE TRANSPORT OF BAUXITE SLURRY BY

    2012-10-2 · where the world’s first long-distance bauxite slurry pipeline was commissioned in Brazil in September 2007. Owned by Mineração Bauxita Paragominas (MBP) and 245 km long, the pipeline is used to pump up to 4.5 million tonnes (dry weight) of bauxite per year across remote and rugged terrain to the Alunorte Refinery. [1] Terry Cunningham

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  • Use of Bauxite Residue Slurry as Single Activator in a

    2018-11-16 · A synthetic ironsilicate slag- (NFMS) was produced by melting iron ore, quartz sand, limestone and chamotte at a temperature of 1300 °C followed by water quenching in order to obtain a glass with a chemistry comparable to non-ferrous metallurgical slags, such as copper, lead, zincand ferro -nickel slag [11-13].

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  • (PDF) Geotechnical Characterization of Bauxite Residue

    Bauxite residue is the iron-oxide rich mine waste from the processing of bauxite ore for the extraction of alumina through the Bayer process. The

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  • Desulfurization kinetics and mineral phase evolution

    2015-6-10 · The formation of carphosiderite could explain that the content of FeS 2 in bauxite after electrolysis was low, but the desulfurization ratio was also low. When the concentration of H + in electrolyte increased, the carphosiderite changed into SO 42 − and Fe 3 + by hydrolysis reaction, resulting in the high desulfurization ratio.

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  • A review of the characterization and revegetation of

    2015-4-26 · The process consists of grinding and digestion, clarification, precipitation, and calcination (Fig. 2) (Kahane et al. 2002 ): after washing and crushing, the bauxite ore is wet ground with hot caustic liquor to form a slurry. The bauxite slurry is then pumped to digestion units with additional caustic soda solution.

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  • The effect of pH adjustment on the properties and

    2019-4-1 · Bauxite residue slurries. A primary slurry sample (0.3 m3) was taken at an alumina refinery from the underflow of the last washing thickener. A sub-sample with a volume of 15 dm 3, taken from the well-agitated primary slurry sample was used in the experiments.

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  • Bauxite new Group A and revised Group C IMSBC

    After cargo compaction during the voyage, dynamic separation can lead to the formation of a liquid slurry (water and fine solids) above layers of more solid bauxite. The slurry may lead to a dangerous free surface effect, which in turn can cause vessel instability. A demonstration of this effect can be seen here.

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  • Bauxite new Group A and revised Group C IMSBC

    2021-1-18 · After cargo compaction during the voyage, dynamic separation can lead to the formation of a liquid slurry (water and fine solids) above layers of more solid bauxite.

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  • Bauxite SlideShare

    2015-8-29 · Bayer’s Process Milling: The bauxite is washed and crushed, reducing the particle size and increasing the available surface area for the digestion stage. Lime are added at the mill to make a pumpable slurry. Desilication: Bauxite with

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  • Characterization and consolidation behavior of the

    The formation of a cohesive sediment bed is a combination of settling and consolidation processes. These processes strongly influence the structure, properties and erodibility of

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  • Formation, properties and revegetation prospects for

    2019-10-11 · Formation, properties and revegetation prospects 15 3 Bauxite processing residue 3.1 Storage/disposal Throughout the world, the utilisation of bauxite processing residue is very low (Paramguru et al., 2005; Klauber et al., 2011) so that the vast bulk of material is discarded in areas close to the alumina refinery.

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  • Use of Bauxite Residue Slurry as Single Activator in a

    2018-11-16 · The use of bauxite residue (BR) slurry as an activator in a hybrid system is explored in this paper. The strong alkaline nature of the slurry, which is considered as a major barrier for most valorization routes, is beneficial in this approach, where it is used as single source of water and alkalis to activate a hybrid cementitious precursor .

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  • Bauxite new Group A and revised Group C IMSBC

    After cargo compaction during the voyage, dynamic separation can lead to the formation of a liquid slurry (water and fine solids) above layers of more solid bauxite. The slurry may lead to a dangerous free surface effect, which in turn can cause vessel instability. A demonstration of this effect can be seen here.

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  • Extraction Process of Aluminium from Bauxite Ore

    2016-4-11 · The bauxite-sodium aluminate slurry is maintained at a temperature of 107°C by means of steam coils around the inside periphery of the covered concrete tanks. The interconnecting piping between the agitators is arranged so that any one agitator acts as a standby and can be by-passed for maintenance.

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  • Process for the production of aluminum hydroxide

    1992-4-22 · The predesilicated bauxite slurry is mixed with another part of the spent liquor (supplied via pipeline (56b)) and introduced via pipeline (44) into indirect heat exchangers of the shell and tube type (45) using flashed steam obtained from the product of the subsequent low temperature digestion for heating.

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  • A review of the characterization and revegetation of

    2015-4-26 · Bauxite is a naturally occurring heterogeneous material, composed of one or several aluminum hydroxide minerals, including primarily gibbsite [Al(OH) 3], boehmite [γ-AlO(OH)], and diaspore [α-AlO(OH)].It is a residual mineral rich in hydrated aluminum oxides (40–60 %) and Si oxide, with oxides of Fe and Ti, and elements such as Zn, Ni, and V also present (MII 2009;

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  • Chemistry of the Acid Neutralization Capacity of

    2009-4-23 · The presence of the minerals was confirmed through X-ray diffraction analyses of the bauxite residue before and after titration. The chemical model provided insights about the reactions controlling acid-base behavior of RM and the potential for metal leaching from the RM slurry at various pH values.

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  • Guidance for safe transport of bauxite SAFETY4SEA

    2018-2-20 · GBWG indicated that Bauxite Fines containing more than 30% of fine particles less than 1 mm; and more than 40% of particles less than 2.5 mm (Group A) may be unstable because of moisture content, resulting in dynamic separation and formation of a liquid slurry (water and fine solids) above the solid material, and a free surface effect which may affect the ship’s stability.

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  • Tube Digestion Technology for Processing of

    2018-6-15 · At times, certain chemicals, like MgO, are added to bauxite slurry before entry to tube digesters for making porous scales for easy dislodging. Since high temperature digestion beyond 250 o C causes conversion of quartz to reactive silica, thus it is always recommended to maintain the digestion temperature at around 240-245 o C and should avoid

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