bayer process flowsheet

bayer process flowsheet

bayer process flowsheet

  • Bayer process - Wikipedia

    OverviewProcessWasteHistory of the Bayer processSee also

    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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  • 4. EXISTING WAGERUP REFINERY 4.1 ALUMINA REFINING

    A simplified process flow diagram of the Bayer process used at the Wagerup refinery is presented in Figure 6. Bauxite is ground to less than 1.5 mm particle size at the refinery, using semi-autogenous

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  • Bayer Process - an overview ScienceDirect Topics

    During the Bayer's process, bauxite is fine milled. As a consequence, the red mud generated has a very fine particle size distribution. The particle size analysis of red mud was carried out using a laser particle size analyzer (MASTERSIZER S, Malvern, UK). Figure 14.2 shows the particle size distribution of red mud received from ALCOA, Australia.

  • Mining and Refining – Process

    The Bayer Process is the most economic means of obtaining alumina from bauxite. Other processes for obtaining alumina from metal ores are also in use in some refineries, particularly in China and Russia, although these make up a relatively small percentage of global production. The process stages are: The bauxite is washed and crushed, reducing ...

  • Extraction Process of Aluminium from Bauxite Ore

    CompositionNomenclatureProductionExampleOperationMechanismTechnologyAdvantagesAluminum is the most abundant metal in the earths crust and is a constituent of many minerals. However, the material which is highest in aluminum and most free from objectionable impurities is bauxite which, therefore, is practically the only source of the metal under present processes.在911metallurgist上查看更多信息
  • Advanced Solutions for Alumina Refineries

    Typical BAYER-Process Flowsheet Advanced Solutions for Alumina Refineries • Bauxite Crushing Grinding • Solid Liquid Calcination • Settler Washer Trains • Classification Pumps •

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  • bayer process flow sheet - Piledrivingweb

    The flowsheet in this study illustrates only the following two steps in the modified Bayer Process: grinding and digestion of bauxite in the sodium aluminate liquor, separation and washing of the coarse red mud residue from the sodium aluminate liquor.

  • FLOW SHEET OPTIMIZATION BY THE CONCEPT OF

    Bayer process is known to be the most economical means of obtaining alumina from bauxite. The process involves numerous process units which interact with mixed streams of dissolved and undissolved solids, water and steam. Bayer process consists of three main steps: digestion (extraction), precipitation, and calcination.

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  • Bayer Process - Student - Cheresources Community

    Bayer Process - posted in Student: Hi everyone. I'm currently undergoing design project on my final semester, on bayer process, to produce alumina from bauxite. but its really hard to find details of the process, for example the conversion of the crystallizer, the sollubility of alumina in soda solution, and the condition of the equipment in the process.

  • Bayer Process - an overview ScienceDirect Topics

    The Bayer process was developed and patented by Karl Josef Bayer in Austria in 1888 and essentially involves digesting crushed bauxite in strong sodium hydroxide solutions at temperatures up to 240°C. Most of the alumina is dissolved leaving an insoluble residue known as “red mud” which mainly comprises iron oxides and silica and is removed by filtration.

  • US8461377B2 - High shear process for aspirin production ...

    US8461377B2 US12/144,327 US14432708A US8461377B2 US 8461377 B2 US8461377 B2 US 8461377B2 US 14432708 A US14432708 A US 14432708A US 8461377 B2 US8461377 B2 US 8461377B2 Authority US United States Prior art keywords salicylic acid method high shear dispersion acetic anhydride Prior art date 2007-06-27 Legal status (The legal status is an assumption and is not

  • Bayer process industrial process Britannica

    Other articles where Bayer process is discussed: alumina: extracted from bauxite through the Bayer process, which was developed for the aluminum industry in 1888. In the Bayer process bauxite is crushed, mixed in a solution of sodium hydroxide, and seeded with crystals to precipitate aluminum hydroxide. The hydroxide is heated in a kiln in order to drive off

  • bayers process flowsheet bauxite alluminium

    Based on the Bayer process, invented by the Austrian chemist Josef Bayer, the ... for the complete bauxite handling, storage, crushing and grinding flow sheet,... Get price; Patent US4786482 - Bayer process for producing aluminum ... Nov 22, 1988 ... In the process, a caustic solution having dissolved aluminum hydroxide is ...

  • SMELTING-REDUCTION OF BAUXITE FOR SUSTAINABLE

    BAYER PROCESS Alumina is mainly produced from bauxite ore through the well-known Bayer process, a hydrometallurgical process invented by Carl Josef Bayer in 1888-1892. 1 In this process bauxite ore is the main raw material and it is digested together with

  • Aluminum Mineral Processing and Metallurgy: Iron-Rich ...

    The process flowsheet of Bayer alumina production. 3. Iron-rich bauxite processing and metallurgy. Iron-rich bauxite ore usually contains over 40 wt% iron oxide [11, 12], huge reserves are found in Australia, Guinea, Brazil, Laos, Vietnam and China, but they have not yet been used effectively.

  • MULTI-SOLVER MODELING FOR PROCESS SIMULATION

    MULTI-SOLVER MODELING FOR PROCESS SIMULATION AND OPTIMIZATION L. T. Biegler and Dilek Alkaya Carnegie Mellon University Pittsburgh, PA 15213 ... process flowsheet with about ten decision variables, we see requirements of hundreds (or ... (Bayer), Plantelligence (Aspen Tech) and SimSight/Simulation Manager

  • Bull. Mater. Sci., Vol. 19, No. 6, December 1996, pp. 905 ...

    tion and calcination. A typical flowsheet of the process is shown in figure 2. The basic Bayer process has almost been unaltered from its invention and would be the primary route for producing smelter and chemical grades of alumina in the years to come.

  • Mineral Processing Flowsheets

    The Mineral Processing Flowsheets shown on the following pages are based on actual data obtained from successful operating plants. Metallurgical data are shown in these flowsheets which incorporate Crushers, Grinding Mills, Flotation Machines, Unit Flotation Cells, and Selective Mineral Jigs as well as other standard milling equipment. The Flotation Machine, the Selective Mineral Jig and the ...

  • Water Requirements of the Aluminum Industry

    All alumina plants in the United States derive alumina from bauxite by the Bayer process >r by the Combination process, a modification of the Bayer process. Although the chemical >rocess for obtaining alumina from bauxite is essentially the same at all plants, different

  • Diphenylmethane diisocyanate (MDI) - Polyurethanes

    Diphenylmethane diisocyanate (MDI) A report by I Boustead for PlasticsEurope Data last calculated March 2005 1. ... were first produced in 1937 by Otto Bayer and his co-workers in Germany and represent a family of polymers rather than a single polymer. Urethane polymers can be produced with a wide variety of properties, ... Process routes

  • Object-oriented simulation of hydrometallurgical processes ...

    The steady-state process simulator developed by Kiranoudis et al. has been used for the detailed simulation of the Bayer process flowsheet. It consists of the digestor/flash section as well as the precipitation and washing circuits. Advanced hydrometallurgical process models for the specific unit operations involved were developed and are appropriately described.

  • HSC Sim – Process Simulation Module - Outotec

    The process model created using the HSC-Sim flowsheet module consists of one HSC-Sim file with a graphical flowsheet and one XLS file for each process unit. These process files are always saved in the same file folder. The XLS files contain the calculation model of the unit, and these XLS-models may be reused in the other processes.

  • 2-1 Recausticizing - Principles and Practice

    we try to make any process calculations it is good to have an understanding of the process flowsheet of a typical recausticizing plant as shown in Figure 1. From a control stand point recausticizing plant operation generally starts at the inlet of the green liquor clarifier or green liquor stabilization tank if one is installed. Operation

  • Impact of Bayer Process Liquor Impurities on ...

    Jun 20, 2007  A review of the determination of organic compounds in Bayer process liquors. Analytica Chimica Acta 2011, 689 (1) , 8-21. DOI: 10.1016/j.aca.2011.01.040. Greg Power, Joanne Loh. Organic compounds in the processing of lateritic bauxites to alumina.

  • Full text of "Cost estimate of the Bayer process for ...

    Full text of "Cost estimate of the Bayer process for producing alumina, based on 1982 equipment prices" See other formats *. M '* ^ o. : W .'^; %

  • HSC Sim – Process Simulation Module - Outotec

    The process model created using the HSC-Sim flowsheet module consists of one HSC-Sim file with a graphical flowsheet and one XLS file for each process unit. These process files are always saved in the same file folder. The XLS files contain the calculation model of the unit, and these XLS-models may be reused in the other processes.

  • (PDF) Beneficiation of Bauxite – Upgrading of Recoverable ...

    Academia.edu is a platform for academics to share research papers.

  • Aspen Plus - Aspen Technology

    Boost profitability by closing the gap between planning and actual operations through the Aspen Plus V11 release. Improve batch operations through visual scheduling insights, optimize distillation columns through customizable tray design and added configuration flexibility and build your models with confidence with expanded physical property capabilities.

  • Calcination Process Flow Diagram Beltconveyers Net

    Process Flow Sheet Diagram, concrete crushing plant flow sheet Crusher South Africa. how to design a crusher plant beltconveyers.net the layout of crushing plants and ancillary equipment and structures is a flowsheet and selected. read /pics/ bayer process material balance Solution for ore mining

  • SUSTAINABILITY IN ALUMINA PRODUCTION FROM BAUXITE

    BAYER PROCESS Alumina is mainly produced from bauxite ore through the well-known Bayer process, a hydrometallurgical process invented by Carl Josef Bayer in 1888-1892. 1 A simplified process flowsheet for the process is illustrated in Figure 2. In this process bauxite

  • Recovery of gallium from Bayer liquor: A review ...

    A process for recovering gallium from Bayer liquor by means of direct liquid/liquid extraction is known from a French Patent (Heigorsky and Leveque, 1976, Helgorsky and Leveque, 1974). In this process Kelex 100, 8-hydroxyquinoline (“oxin”, or “oxime”), substituted with a long alkyl chain (e.g. 7-(4-ethyl-1-methyloctyl), was investigated ...

  • Nitrobenzene/ Aniline/ MDI - Nexant Subscriptions

    BASF, Bayer, BorsodChem/Yantai Wanhua, and Sinopec ... The chemistry and a process flowsheet are also presented in this section, to compare with routes via MDC. In all the non-phosgene methods proposed, the carbamate is thermally decomposed to produce ... Nitrobenzene/Aniline/ MDI chemsystems CHEMSYSTEMS PERP PROGRAM

  • Method for the causticisation of Bayer process solutions ...

    WO 2006/081626 PCT/AU2006/000140 -1 "Method for the Causticisation of Bayer Process Solutions" Field of the Invention The present invention relates to a method for the causticisation of Bayer process solutions. 5 Background Art The Bayer process is widely used for the production of alumina from alumina containing ores such as bauxite.

  • 2-1 Recausticizing - Principles and Practice

    we try to make any process calculations it is good to have an understanding of the process flowsheet of a typical recausticizing plant as shown in Figure 1. From a control stand point recausticizing plant operation generally starts at the inlet of the green liquor clarifier or green liquor stabilization tank if one is installed. Operation

  • BAYER PROCESS - idc-online

    BAYER PROCESS Bayer process is the process of refining alumina. from bauxite (aluminum ore containing 30-50% of hydrated aluminum oxide) by selective extraction of pure aluminum oxide dissolved in sodium hydroxide. Prior to the Bayer process bauxite is crushed and ground in mills to fine particles (max. size 0.06”/1.5mm).

  • Aluminium smelting - Wikipedia

    Aluminium smelting is the process of extracting aluminium from its oxide, alumina, generally by the Hall-Héroult process.Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery.. This is an electrolytic process, so an aluminium smelter uses huge amounts of electricity; smelters tend to be located close to large power stations, often hydro-electric ones ...

  • (PDF) THERMODYNAMIC PROCESS MODELING AND SIMULATION

    A mathematical model of the dynamics of caustic concentration in the Bayer Process has been developed. The incorporation of the model into computer simulation programs has provided information ...

  • SMELTING-REDUCTION OF BAUXITE FOR SUSTAINABLE

    BAYER PROCESS Alumina is mainly produced from bauxite ore through the well-known Bayer process, a hydrometallurgical process invented by Carl Josef Bayer in 1888-1892. 1 In this process bauxite ore is the main raw material and it is digested together with