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Bauxite tailings Wikipedia
Bauxite tailings, also known as bauxite residue, red mud, red sludge, or alumina refinery residues (ARR), is a highly alkaline waste product composed mainly of iron oxide that is generated in the industrial production of alumina (aluminium oxide, the principal raw material used in the manufacture of aluminium metal and also widely used in the manufacture of ceramics, abrasives and refractories)Jan 21, 2019· Red mud flowing from the Hydro Alunorte compound after the flood photo: internet reproduction (Rio Times) Para’s Secretariat of Environment and Sustainability issued a note lifting its embargo and saying normal operations can resume, Hydro said in a statementBrazil Lifts Embargo on Norsk Hydro Alunorte Alumina Refinery
Bauxite Residue accident from Norwegian Red Mud Project
The report from Health’s Ministry’s Evandro Chagas Institute reveals that heavy rains led to the overflow of several basins, including those in Hydro Alunorte’s compound around the metropolitan area of Para’s capital, located in the Amazon region, threatening the area’s drinking water supplyMar 16, 2018· Norsk Hydro describes the Alunorte plant as the world’s largest alumina refinery The company’s biggest shareholder, the streams started to receive this red mudPollution, illness, threats and murder: is this Amazon
red mud alunorte zonnebloempaleisnl
Jun 18, 2010· [Using a Statistical Model in the Red Mud Filtration to Predict the Caustic Concentration in the Red Mud Borges A and Aldi J Alunorte Light Metals 2009, pp 117–119] The effect of rotational speed The capacity of a troughfeed rotary vacuum filter is aMay 16, 2019· The partial closure of the Alunorte refinery, the largest alumina plant in the world with annual capacity of 63 million tonnes, was down to concerns that red mudChinese outages a reminder of aluminum's dirty secret
Another red mud disaster in Brazil orbiteforum
Mar 16, 2018· Alunorte's red mud spill happened after an unusually heavy and long rainfall in April 2009 At its most intense, the region had 105 millimeters of rain in just 90 minutes The extreme rain made water containing red mud from the deposit seep into the Murucupi riverRed mud in an liquid state causes harmful effects to human skin Composition and properties of Red mud in the World have been presented by many researchers in their publications The result showed that: Red mud Tanrai Alumina Processing plant contains a big content of oxides, such as: Fe 2 O 3, Al 2 O 3 , SiO 2, TiO 2MATERIAL COMPOSITION AND PROPERTIES OF RED MUD
Outotec to deliver a filtration plant for Alunorte's
Located in Barcarena, State of Pará in Northern Brazil, Alunorte's alumina refinery is the largest in the world and in its majority owned by Norwegian aluminum producer Norsk Hydro ASA The red mud dry storage solution based on Outotec's filter plant concept is environmentally the most sustainable and safe solution for red mud disposalRed mud is a solid waste residue of the digestion of bauxite ores with caustic soda for alumina production Its disposal remains a worldwide issue in terms of environmental concerns(PDF) Progress of Red Mud Utilization: An Overview
Outotec to deliver a filtration plant for Alunorte's
Located in Barcarena, State of Pará in Northern Brazil, Alunorte's alumina refinery is the largest in the world and in its majority owned by Norwegian aluminum producer Norsk Hydro ASA The red mud dry storage solution based on Outotec's filter plant concept is environmentally the most sustainable and safe solution for red mud disposalJun 18, 2010· [Using a Statistical Model in the Red Mud Filtration to Predict the Caustic Concentration in the Red Mud Borges A and Aldi J Alunorte Light Metals 2009, pp 117–119] The effect of rotational speed The capacity of a troughfeed rotary vacuum filter is ared mud alunorte zonnebloempaleisnl
Tests with New Flocculant for Red Mud Decanting in Alunorte
Tests with New Flocculant for Red Mud Decanting in Alunorte Juracy Filho Alunorte – Alumina do Norte do Brasil SA, Rodovia PA 481, km 12 Distrito de Murucupi, CEP: 68447‐000, Barcarena‐PA, Brasil Search for more papers by this author Tatiani SantosTo produce alumina with high quality, competitive costs and high efficiency on caustic recover with low flocculant consumption has been a challenge for the filtration area in Alunorte This area has 3 chains each with 5 washers for 7 production lines where together, handles about 4,4 Mtpy of red mudTests with New Flocculant for Red Mud Decanting in Alunorte
Cleaner red mud residue production at an alumina plant by
ALUNORTE disposes of red mud residue by this drystacking method This storage solution, however, is economically problematic due to the costs of construction and maintenance of the disposal structures and creates environmental problems for the storage sites, mainly due to the caustic nature of the mud, which could pose hazards to livingAlunorte, like most of the world’s refineries, uses the Bayer process to extract alumina from bauxite This production technique also creates a mix of byproducts, known in the industry as ‘red mud’, which is typically stored in tailings dams or containment ponds that are facing increased scrutiny following two deadly dam bursts in BrazilBauxite & alumina: Norsk Hydro gets goahead for Alunorte
A New Technology for Dry Disposal of Alunorte's Bauxite
Summary This chapter contains sections titled: Introduction Alunorte's DRS Concept New Technology for Red Mud Filtration Residue Disposal Capabilities A New Technology for Dry Disposal of Alunorte's Bauxite Residue Light Metals 2013 Wiley Online LibraryAs a rough rule of thumb a tonne of alumina on average generates about oneandahalf tonnes of red mud Hydro said production at Alunorte would hit 75 per cent to 85 per cent of its 63m tonneNorsk Hydro given green light to resume full production at
Internal Alunorte Task Force Report
In 2014, Alunorte sanctioned the Press filter and DRS2 project to replace the drum filters with build press filters and the new deposit area to reduce the environmental footprint of red mud deposit area The press filter material is dryer, less caustic than the drum filter material, and can be compactedMar 11, 2019· Studies at Alunorte indicate that compared to dry stacking technology, the benefits of dry disposal would be an increase of the red mud solids content from 64 wt% to 80 wt%, a reduction of the overall amount of red mud by 20 wt%, and a reduction of the liquid disposed with the red mud byARTICLE: Addressing the Challenge of Bauxite Residue
RPTCOLUMNAlumina roller coaster spins price to twoyear
Jul 31, 2019· Alunorte had been operating at half capacity since February 2018 under a court order related to allegations of runoffs from a tailings dam holding the “red mudMay 17, 2019· The partial closure of the Alunorte refinery, the largest alumina plant in the world with annual capacity of 63 million tonnes, was down to concerns that red mudChinese outages a reminder of aluminium's dirty secret
Column: Alumina roller coaster spins price to twoyear
Jul 30, 2019· Alunorte had been operating at half capacity since February 2018 under a court order related to allegations of runoffs from a tailings dam holding the “red mudAward for the use of red mud as raw material for bricks production Green belt of 3,500 hectares around the plant Reforestation project on the red mud deposit with local species Red Mud Project for production of pavimentblocks Monitoring of air emissions and Effluents Georeferencing 2010 Energy efficiency recognition at Hannover MesseAlunorte presentation site visit Hydro
ARTICLE: Addressing the Challenge of Bauxite Residue
Mar 11, 2019· Studies at Alunorte indicate that compared to dry stacking technology, the benefits of dry disposal would be an increase of the red mud solids content from 64 wt% to 80 wt%, a reduction of the overall amount of red mud by 20 wt%, and a reduction of the liquid disposed with the red mud byAlunorte, like most of the world’s refineries, uses the Bayer process to extract alumina from bauxite This production technique also creates a mix of byproducts, known in the industry as ‘red mud’, which is typically stored in tailings dams or containment ponds that are facing increased scrutiny following two deadly dam bursts in BrazilBauxite & alumina: Norsk Hydro gets goahead for Alunorte
Column: Alumina roller coaster spins price to twoyear
Jul 30, 2019· Alunorte had been operating at half capacity since February 2018 under a court order related to allegations of runoffs from a tailings dam holding the “red mudMar 15, 2018· In just 12 hours during February 1617, the city of Barcarena, home to our Alunorte alumina refinery, was hit by an extreme rainfall, flooding the region Red Mud Disposal SolutionAlunorte bauxite residue deposit DRS1
Chinese outages a reminder of aluminium's dirty secret
May 17, 2019· The partial closure of the Alunorte refinery, the largest alumina plant in the world with annual capacity of 63 million tonnes, was down to concerns that red mudMay 28, 2019· The Financial Times reports production at Alunorte would hit 7585% of its 63 million ton capacity within two months, adding some 2 million tons per annum to the marketAlunorte’s Restart Does Not Bode Well for Aluminum Prices
Centrais Elétricas do Norte do Brasil SA | Rio Branco
In Hydro Alunorte, drum filtration is used for dewatering and washing red mud with filter cloths that retains the cake formed by red mud, recovering part of caustic soda, which returns to the proAward for the use of red mud as raw material for bricks production Green belt of 3,500 hectares around the plant Reforestation project on the red mud deposit with local species Red Mud Project for production of pavimentblocks Monitoring of air emissions and Effluents Georeferencing 2010 Energy efficiency recognition at Hannover MesseAlunorte presentation site visit Hydro
Alunorte bauxite residue deposit DRS2
Mar 15, 2018· In just 12 hours during February 1617, the city of Barcarena, home to our Alunorte alumina refinery, was hit by an extreme rainfall, flooding the region Hydro has commissioned BrazilianWith the exception of the Alunorte alumina project, no major new In alumina production, the disposal of bauxite residue saturated with caustic soda ("red mud") is the main problem, although emissions to the atmosphere of gases and particles from boilers, calcinationENVIRONMENTAL ASPECTS OF BAUXITE, ALUMINA AND
Alumina: Filtration in the alumina production process
Jun 18, 2010· [Using a Statistical Model in the Red Mud Filtration to Predict the Caustic Concentration in the Red Mud Borges A and Aldi J Alunorte Light Metals 2009, pp 117–119] The effect of rotational speed The capacity of a troughfeed rotary vacuum filter is a bit less than proportional to the square root of the speed So, doubling the speed (×2** Alunorte Alumina do Norte do Brasil Rodovia PA 481 km 12 – Distrito do Murucupi Barcarena – Pará – Brazil (email: ) after digestion (red mud) is removed by sedimentation and filtration process The pregnant liquor in alumina is send to the precipitation, which is almost pure crystals of Al(OH)3Advanced Process Control Wide Implementation in Alunorte
Norsk Hydro gets goahead to resume production at Alunorte
May 21, 2019· Typically, red mud is stored in dams or containment pools, but following two dam bursts in Brazil in recent years, the method is under increased scrutiny A tonne of alumina creates, roughly, around one and a half tonnes of red mud Norsk Hydro has pointed out that it still does not have approval for a new containment pool at Alunorte, leavingOutotec is a world leader in alumina refinery technologies, with a particular focus on calcination and hydrate filtration, tube digestion (HOT JV), settler washers, red mud filtration and security filtration References: Klett et al, Alumina Calcination: A mature Technology under review from a supplier perspective, TMS, Light Metals, 2015Generation 5 Calciner Outotec