fluidised bed application of size separation for bauxite beneficiation Mr Prasad has mentioned that they have looked into the removal of silica in bauxite ore through screening at 20 mesh size where only 50 bauxite is the loss However they may have to go down to 10 mesh or 1j8 coarser sizes because of difficulties of blind
Get Price4 EXISTING WAGERUP REFINERY Bauxite is ground to less than 1 5 mm particle size at the refinery using semi autogenous grinding mills SAG and/or Ball mills to ensure sufficient solid liquid contact during the desilication the removal of silica from the liquor to commence
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Get PriceThis helps to pre react any clays or other highly reactive silica containing minerals in the bauxite and start the formation of de silication product DSP The DSP contains caustic alumina and silica roughly in the mass ratio of 1 1 25 1 5 Thus the removal of silica also causes valuable caustic and alumina to report to the waste stream
Get Price· Abstract not available for EP0950020 Abstract of corresponding document US6309615 A process for the removal of reactive silica from a feedstock to the digestion step of the Bayer process for the manufacture of alumina in which a the feedstock is contacted with a caustic liquor under process conditions which result in dissolving and stabilizing at least 50% of the silica
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Get PriceROAST ALKALINE LEACHING OF SILICA FROM KAOLINITIC CLAY bauxite as source of the alumina required to form calcium aluminate Kaolinite with high alumina content is the most likely candidate as a replacement for bauxite Although in the removal of silica is crucial to the reaction yield
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Get PriceCrushed and washed bauxite ore must first go through a process to remove any silica found in the bauxite which would otherwise hinder the process and result in a product of lesser quality In a process known as digestion after any silica has been removed the remaining bauxite ore is combined with a hot caustic soda material in a heated
Get PriceTechnical Note Removal of limestone from bauxite by magnetic separation E Th Stamboliadis G Kailis hand silica and lime interfere with the chemistry of the process and form insoluble substances with sodium heavy media separation has been used to remove limestone from bauxite due to the difference in specific gravity
Get PriceA primary objective of the beneficiation process is tions for the removal of the lower grade of fines the removal of silica in bauxite ore through screening Bauxite Ore Beneficiation be acute need to develop the process for beneficiation of the low grade silica from low grade bauxite ore for utilisation as feed material in Moisture Removal
Get PriceA range of occupational health risks in bauxite mining and alumina refining require the iron oxides hydrated iron oxides titanium oxide and silica deeper and underground mining is needed to economically extract this material stream during refining—some to sand residue but most to mud residue
Get PriceAlumina & Bauxite is used in varying amounts to remove silica from bauxite ore and for causticization in the manufacture of alumina The extent of
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Get PriceWO1998022390A1 of silica from bauxite A process for removing silica from bauxite is The process is based upon operating the digestion step to reduce the amount of reactive silica dissolved from
Get PriceSerpek s method is used for the purification of bauxite if it contains excess amount of silica SiO 2 DETAILS OF THE PROCESS The powdered bauxite is mixed with carbon and heated up to 1800 o C and a current of
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