alumina yield in the bayer process past

Alumina Yield in the Bayer Process Past, Present and During the past decades a large number of alumina plants were successful in economically increasing the pr alumina yield in the bayer process past

alumina yield in the bayer process past

  • Alumina Yield in the Bayer Process Past, Present and

    During the past decades a large number of alumina plants were successful in economically increasing the productivity of the Bayer liquor loop Over a period of 25 years the benchmark precipitation yield has increased from 70 g/l to 90+ g/l, whilst producing sandy alumina However with the theoretical maximum precipitation yield at 160 g/l thereAlumina Yield in the Bayer Process; Past, Present and Prospects Edited by TMS (The Minerals, Metals & Materials Society), 2007 ALUMINA YIELD IN THE BAYER PROCESS PAST, PRESENT AND PROSPECTS Roelof Den Hond1, Iwan Hiralal2, Ab Rijkeboer3 1 Alcor Technology, Clinckenburgh 10, 2343 JH Oegstgeest, The Netherlands 2 Hiracon, Prinses Irenelaan 2, 2273 DD Voorburg, The(PDF) ALUMINA YIELD IN THE BAYER PROCESS PAST,Alumina Yield in the Bayer Process Past, Present and Prospects Roelof Den Hond Alcor Technology, Clinckenburgh 10, 2343 JH Oegstgeest, The Netherlands Search for more papers by this author Iwan Hiralal Hiracon, Prinses Irenelaan 2, 2273 DD Voorburg, The NetherlandsAlumina Yield in the Bayer Process Past, Present and

  • Alumina Yield in the Bayer Process Past, Present and

    Download Citation | Alumina Yield in the Bayer Process Past, Present and Prospects | During the past decades a large number of alumina plants were successful in economically increasing theCiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): During the past decades a large number of alumina plants were successful in economically increasing the productivity of the Bayer liquor loop Over a period of 25 years the benchmark precipitation yield has increased from 70 g/l to 90+ g/l, whilst producing sandy aluminaCiteSeerX — ALUMINA YIELD IN THE BAYER PROCESSDuring the past decades a large number of alumina plants were successful in economically increasing the productivity of the Bayer liquor loop Over a period of 25 years the benchmark precipitation yield has increased from 70 g/l to 90+ g/l, whilst producing sandy alumina However with the theoretical maximum precipitation yield at 160 g/l there is still a wide gap to be closedAlumina Yield in the Bayer Process Past, Present and

  • Alumina Yield in the Bayer Process | SpringerLink

    Abstract The alumina industry has historically been able to reduce alumina production costs, by increasing the liquor alumina yield To know the potential for further yield increases, the phase diagram of the ternary system Na 2 OAl 2 O H 2 O at various temperature levels was analysed It was found that the maximum theorical precipitation alumina yield is 160 g/l, while that for digestionDownload Citation | Alumina Yield in the Bayer Process | The alumina industry has historically been able to reduce alumina production costs, by increasing the liquor alumina yield To know theAlumina Yield in the Bayer Process ResearchGateThe Bayer process for alumina production is a highly energy intensive in practice The cost Alumina Yield in the Bayer Process Past, Present and Prospects, Light Metals 2007, p 37 2 Wischnewski, R etal, Alunorte Global Energy Efficiency, Light Metals, TMS 2011 Annual Meeting, pEnergy Consumption Optimization in Alumina Production

  • Bayer Process: Manufacturing Of Alumina | Making of

    Alumina has a boiling point of 2980 degree Celsius and melting point of 2040 degree Celsius Its molar mass is 10196 g/mol The Bayer Process: Alumina is the main components of bauxite, so bauxite is refined in order to produce Alumina The Bayer process isDuring the past decades a large number of alumina plants were successful in economically increasing the productivity of the Bayer liquor loop Over a period of 25 years the benchmark precipitation yield has increased from 70 g/l to 90+ g/l, whilst producing sandy aluminaALUMINA YIELD IN THE BAYER PROCESS PAST, PRESENTThe alumina industry has historically been able to reduce alumina production costs, by increasing the liquor alumina yield To know the potential for further yield increases, the phase diagram of the ternary system Na 2 OAl 2 O H 2 O at various temperature levels was analysed It was found that the maximum theorical precipitation alumina yield is 160 g/l, while that for digestion wasAlumina Yield in the Bayer Process NASA/ADS

  • alumina yield in the bayer process Mining

    ALUMINA YIELD IN THE BAYER PROCESS PAST, PRESENT Alumina Yield in the Bayer Process; Past, Present and Prospects Edited by TMS (The Minerals, Metals & Materials Society), 2007 ALUMINA YIELD IN THE BAYER PROCESS »More detailedAlumina has a boiling point of 2980 degree Celsius and melting point of 2040 degree Celsius Its molar mass is 10196 g/mol 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 aluminaBayer Process: Manufacturing Of Alumina | Making ofThe Bayer process for alumina production is a highly energy intensive in practice The cost Alumina Yield in the Bayer Process Past, Present and Prospects, Light Metals 2007, p 37 2 Wischnewski, R etal, Alunorte Global Energy Efficiency, Light Metals, TMS 2011 Annual Meeting, pEnergy Consumption Optimization in Alumina Production

  • Bayer process production of alumina hydrate Kaiser

    An improved precipitation system is provided for the Bayer process production of alumina hydrate In order to produce coarse and strong alumina hydrate at high yield, supersaturated Bayer process sodium aluminate liquor is seeded with a relatively small seed charge in a first precipitator at a relatively low temperature and the produced slurry is transferred to a second precipitator whereequation in the mass balance model based on validation against typical industrial yield The alumina yield is observed to reduce significantly once the scale volume exceeds 10% of the tank volume 1 Introduction Precipitation of alumina trihydrate (Al(OH) 3) or gibbsite during the Bayer process oftenMass Balance of Precipitation Process of the Bayer1 A process of production of alumina hydrate from supersaturated Bayer process sodium aluminate liquor derived by digesting bauxite with a caustic medium at elevated temperature and pressure which comprises: (a) introducing a supersaturated sodium aluminate liquor into a plurality of precipitation vessels arranged in parallel and defining a first stage, wherein the liquor of step (a) has anImprovements in the bayer process production of alumina

  • A Study of the Influences of Bayer Process Impurities on

    Alumina, AlgOj, Is obtained principally via the Bayer process from bauxite, an ore formed by the weathering of aluminumbearing rocks In essence, the Bayer process consists of digesting bauxite In a concen­ trated solution of caustic soda (NaOH) at elevated temperatures to yieldAlumina (Al2O3) is the main material used for the aluminum production, which is originated from bauxite ore through hydrothermal processes Although bauxite conversion to alumina can be done through a few competitive processes, the main commercial process is still the wellknown Bayer processSUSTAINABILITY IN ALUMINA PRODUCTION FROMDuring the past decades a large number of alumina plants were successful in economically increasing the productivity of the Bayer liquor loop Over a period of 25 years the benchmark precipitation yield has increased from 70 g/l to 90+ g/l, whilst producing sandy aluminaALUMINA YIELD IN THE BAYER PROCESS PAST, PRESENT

  • Essential Readings in Light Metals, Volume 1, Alumina and

    Alumina Yield in the Bayer Process Pages 522527 Hond, R Preview Buy Chapter 25,95 € Alumina Yield in the Bayer Process Past, Present and Prospects Pages 528533 Hond, Roelof (et al)An improved precipitation system is provided for the Bayer process production of alumina hydrate In order to produce coarse and strong alumina hydrate at high yield, supersaturated Bayer process sodium aluminate liquor is seeded with a relatively small seed charge in a first precipitator at a relatively low temperature and the produced slurry is transferred to a second precipitator whereBayer process production of alumina hydrate Kaiser1 A process of production of alumina hydrate from supersaturated Bayer process sodium aluminate liquor derived by digesting bauxite with a caustic medium at elevated temperature and pressure which comprises: (a) introducing a supersaturated sodium aluminate liquor into a plurality of precipitation vessels arranged in parallel and defining a first stage, wherein the liquor of step (a) has anImprovements in the bayer process production of alumina

  • Bayer Process | Yield (Engineering) | Crystallization

    Alumina Yield in the Bayer Process; Past, Present and Prospects Edited by TMS (The Minerals, Metals & Materials Society), 2007 ALUMINA YIELD IN THE BAYER PROCESS PAST, PRESENT AND PROSPECTS Roelof Den Hond 1, Iwan Hiralal 2, Ab Rijkeboer 3 1 Alcor Technology, Clinckenburgh 10, 2343 JH Oegstgeest, The Netherlands 2 Hiracon, Prinses Irenelaan 2, 2273 DDequation in the mass balance model based on validation against typical industrial yield The alumina yield is observed to reduce significantly once the scale volume exceeds 10% of the tank volume 1 Introduction Precipitation of alumina trihydrate (Al(OH) 3) or gibbsite during the Bayer process oftenMass Balance of Precipitation Process of the BayerAlumina, AlgOj, Is obtained principally via the Bayer process from bauxite, an ore formed by the weathering of aluminumbearing rocks In essence, the Bayer process consists of digesting bauxite In a concen­ trated solution of caustic soda (NaOH) at elevated temperatures to yieldA Study of the Influences of Bayer Process Impurities on

  • Alumina from Bauxite Extraction and Production of

    Alumina is the common name given to aluminum oxide (Al2O3) Alumina is produced from bauxite, an ore that is mined from topsoil in various tropical and subtropical regions The Bayer process, discovered in 1887, is the primary process by which alumina is extracted from bauxiteSoda is the main impurityin alumina produced by the Bayer process and this can be a hindrance for certain technical applicationsSeveral methods for soda extraction exist, such as hydrate washing or the use of silica to manufacture an alumina with a very low soda content Calcined alumina is produced as particlesof white powderAlumina Refining | PDF | Crystallization | Aluminium Oxideproduced along with, alumina (about 12 t per ton of alumina), to make the process economically feasible ; it requires about 45 tons of shale, 15 tons of limestone and 40,000,000 kCal High energy and raw material consumptions for producing alumina alone, make the process unfeasibleA DOCUMENTARY STUDY ON ALUMINA EXTRACTION