bayers process of bauxite concentration

bayers process of bauxite concentration

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  • US7767190B2

    An improved process for the causticisation of Bayer liquors in an alumina refinery, the process including the steps of reacting lime with aluminate ions in a Bayer liquor within a primary reactor under controlled conditions of low to moderate temperature (between 70-80° C) and agitation, to form substantially only a hydrocalumite species and hydroxyl ions; and a secondary reactor wherein the ....

  • Bayer Process

    Alton T Tabereaux, Ray D Peterson, in Treatise on Process Metallurgy: Industrial Processes, 2014 2511 Impact of Different Bauxites on the Bayer Process The Bayer process is basically used for the extraction of aluminum hydrate from the bauxite ores with the mass ratio of alumina to silica (A/S) above 9 The sinter process is widely used to process the poor-grade diasporic bauxite ores ....

  • Alumina 3 Bayer Species Model

    Tag / Symbol: Input / Calc: Description Menu Command View - Plant Model - Globals Tab - Bayer Properties:: ASatMethod: Rosenberg: Saturated Alumina concentration See Saturated Alumina Concentration for equations used: RosenbergUser: This uses the same equation as above, but user are able to adjust all the constants in the equation manually...

  • Aluminum processing

    The Bayer process, with various modifications, is the most widely used method for the production of alumina, and all aluminum is produced from alumina using the Hall-Héroult electrolytic process Refining the ore There are a number of alkaline, acid, and thermal methods of refining bauxite, clay, or other ores to obtain alumina Acid and ....

  • Rare Earth Element Phases in Bauxite Residue

    During the Bayer process, the bulk of REEs is almost entirely transferred to bauxite residue, based on case studies of lanthanum, scandium , cerium and yttrium distribution in the Bayer process Depending on the concentration of REEs in the bauxite ore, bauxite residue can have a concentration of total REEs up to 2500 mg/kg such as in the case ....

  • Bayer process

    Bayer process - Wikipedia...

  • ANewProcessTechnologyofBauxiteConcentration

    Most alumina refineries use conventional sinter process or combined process; only Pingguo Aluminium Corp is operating directly the Bayer process Energy consumption for the combined process is 32 GJ/t A12O3, 42 GJ/t for sinter, compared to 9-12 with pure Bayer process Operating cost is USD 170/t A12O3 for combined process, 220 for sinter ....

  • EKC336 Group 7

    Oct 31, 2017· These educational video presentations are prepared in fulfilment of the requirements for EKC336 Chemical Reaction Engineering Course School of Chemical Engineering Universiti Sains Malaysia Sem I ....

  • Conversion of Bauxite Ore to Aluminum Metal

    As the minerals are weathered they gradually breakdown into various forms of hydrated aluminum oxide, Al 2 O 3xH 2 O, known as bauxite The bauxite is purified by the Bayer Process First the ore is mixed with a hot concentrated solution of sodium hydroxide...

  • The Dynamic Modelling of Caustic Concentration in ,

    In the Bayer process, bauxite is leached with caustic soda, forming a solution of sodium aluminate, from which hydrated alumina is precipitated The efficient operation of the continuous form of this process requires that the concentration of caustic soda be controlled A computer simulation of the concentration of caustic soda has been conducted to provide....