091102 Aluminium
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Determination of Aluminium As Oxide
DETERMINATION OF ALUMINIUM AS OXIDE By William Blum CONTENTS Page I. Introduction 515 II. General principles 516 III. Historical 516 IV. Precipitation of aluminium hydroxide. 518 1. Hydrogen electrode studies 518 (a) The method 518 (b) Apparatus and solutions employed 518 (c) Results of hydrogen electrode experiments 519 (d) Conclusions from hydrogen electrode experiments 520 2. Selection of an indicator for denning the conditions of precipita- '. tion . 522 3. Factors affecting the form of the precipitate 524 4. Precipitation in the presence of iron 525 V. Washing the precipitate . 525 VI. Separation from other elements 526 VII. Ignition and weighing of the precipitate 528 1. Hygroscopicity of aluminium oxide 529 2. Temperature and time of ignition 529 3. Effect of ammonium chloride upon the ignition 531 VIII. Procedure recommended 532 IX. Confirmatory experiments 532 X. Conclusions '534 I. INTRODUCTION Although a considerable number of precipitants have been pro- posed for the determination of aluminium, direct precipitation of aluminium hydroxide by means of ammonium hydroxide, fol- lowed by ignition to oxide, is most commonly used, especially if no separation from iron is desired, in which latter case special methods must be employed. While the general principles involved in this determination are extremely simple, it has long been recog- nized that certain precautions in the precipitation, washing, and ignition are necessary if accurate results are to be obtained. While, however, most of these details have been studied and dis- cussed by numerous authors, it is noteworthy that few publica- tions or textbooks have taken account of all the factors. In the 515 ; 516 Bulletin of the Bureau of Standards [Voi.i3 present paper it seems desirable, therefore, to assemble the various recommendations and to consider their basis and their accuracy. -
A Novel Method for Synthesis of Nano-C-Al2o3: Study of Adsorption Behavior of Chromium, Nickel, Cadmium and Lead Ions
Int. J. Environ. Sci. Technol. (2015) 12:2003–2014 DOI 10.1007/s13762-014-0740-7 ORIGINAL PAPER A novel method for synthesis of nano-c-Al2O3: study of adsorption behavior of chromium, nickel, cadmium and lead ions A. Shokati Poursani • A. Nilchi • A. H. Hassani • M. Shariat • J. Nouri Received: 30 April 2014 / Revised: 5 November 2014 / Accepted: 22 December 2014 / Published online: 14 January 2015 Ó Islamic Azad University (IAU) 2015 Abstract Nano-c-Al2O3 adsorbent was synthesized by Introduction the novel sol–gel method. The adsorbent was characterized by transmission electron microscope, Fourier transform Heavy metal pollution occurs during different industrial infrared and X-ray powder diffraction. The effects of sev- activities, and rapid industrialization leads to the increase eral variables such as, adsorbent weight, pH and contact of heavy metal concentration in the environment (Rahmani time on adsorption of chromium (Cr6?), nickel (Ni2?), et al. 2010). It can also increase the concentration of heavy cadmium (Cd2?) and lead (Pb2?) ions were studied in metal ions, such as cadmium (Cd), lead (Pb), zinc (Zn), batch experiments. The results showed that the synthesized nickel (Ni), copper (Cu) and chromium (VI) in water nano-c-Al2O3 had a good capacity to adsorb Cr and Pb. resources (Aziz et al. 2008). The toxic nature of heavy The kinetic data were described with pseudo-first- and metals has caused serious health problems for human, and pseudo-second-order models. Three isotherm models, they can accumulate in the environment (Rahmani et al. namely Freundlich, Langmuir and Tempkin, were used for 2010). In addition, recovery and removal of heavy metals analysis of equilibrium data, and results showed that are principal purposes in industry and saving clean water Langmuir and Freundlich models were suitable for resources (Sharma and Tamar 2008; Neghlani et al. -
Aluminium Production Process: Challenges and Opportunities
metals Editorial Aluminium Production Process: Challenges and Opportunities Houshang Alamdari Aluminium Research Centre—REGAL, Université Laval, Quebec City, QC G1V 0A6, Canada; [email protected]; Tel.: +1-418-656-7666 Academic Editor: Hugo F. Lopez Received: 29 March 2017; Accepted: 6 April 2017; Published: 11 April 2017 Aluminium, with more than 50 Mt annual production in 2016, is an essential material in modern engineering designs of lightweight structures. To obtain aluminium ingots from bauxite, three main processes are involved: the Bayer process to produce alumina from bauxite; the anode manufacturing process to produce electrodes, and the smelting process using the Hall-Héroult technology. The Hall-Héroult process, involves the electrolysis of alumina, dissolved in molten cryolite to produce liquid aluminium that should be casted to produce ingots of different types of alloys. The technology is now about 130 years old and the aluminium production experienced a phenomenal growth during the past two decades—the highest growth rate for a commodity metal. The aluminium electrolysis cell is made of a steel shell, the internal surfaces of which are covered with a series of insulating linings made of refractory materials. The top lining, made of carbon, is in direct contact with the molten metal and acts as the cathode. The anode is also made of carbon, suspended in the electrolyte and consumed during electrolysis. According to the International Aluminium Institute [1] the energy required to produce one ton of aluminium varies between 12.8 and 16 MWh, depending on the technology used and the age of the smelters. Carbon consumption of the process—roughly about 400 kg of carbon for tone of aluminium—is also significant, contributing to the generation of about 1.5 tons of CO2 per ton of aluminium. -
Absence of Skin Sensitivity to Oxides of Aluminium, Silicon, Titanium Or Zirconium in Patients With
Gut1996;39:231-233 231 Absence of skin sensitivity to oxides of aluminium, Silicon, titanium or zirconium in patients with Crohn's disease Gut: first published as 10.1136/gut.39.2.231 on 1 August 1996. Downloaded from J C W Lee, S Halpem, D G Lowe, A Forbes, J E Lennard-Jones Abstract obstructive lymphadenopathy. It has been Background-Some metallic compounds, proposed that this is caused by fibrosis of the especially of zirconium, can cause cell afferent lymphatics as a result of absorption of mediated granulomatous inflammation of microparticles of silica and alumino-silicates the skin. Pigment granules containing through the skin where people walk barefoot compounds of aluminium, silicon, and on certain types of soil. Particles containing titanium have been observed within silica, titanium, and aluminium are present in macrophages in the wall of the small microgranulomata within inguinal lymph intestine in health and in Crohn's disease. nodes of sufferers.6 Granulomata also develop Zirconium compounds can be ingested in in response to intradermal injection ofcolloidal toothpaste. silica in healthy subjects but these are foreign Aim-To determine in a pilot study if body granulomata and are clearly distinguish- granulomatous sensitivity can be detected able from the cell mediated response to small to compounds of these metals or silicon quantities of zirconium lactate.7 after injection into the skin of patients As metals and minerals are ubiquitous in the with Crohn's disease. community, a hypersensitivity to these sub- Subjects-Eight patients with Crohn's stances in some people rather than a direct disease known to have had granulomata in toxic effect is the most probable pathogenetic the intestine and not currently treated mechanism by which they may contribute to with corticosteroids, and two healthy disease. -
The Adsorption Characteristics of Cu(II)
www.nature.com/scientificreports OPEN The adsorption characteristics of Cu(II) and Zn(II) on the sediments at the mouth of a typical urban polluted river in Dianchi Lake: taking Xinhe as an example Xiang‑shu Ma1,2,3, Leng Liu1,2,3, Yi‑chuan Fang1,2,3 & Xiao‑long Sun1,2,3* This study is to determine the spatial distribution characteristics of Cu and Zn adsorption on the sediments of the estuary of Dianchi Lake, as well as the composite adsorption law of Cu and Zn on combinations of sediment organic matter, metal oxides, and organic–inorganic composites. The relationship between the adsorption contribution of each component of the substance. A static adsorption experiment was applied to the sediments in the estuary of Dianchi Lake. The relationship between adsorption capacity and sediment composition was analyzed through correlation analysis and redundant analysis. The results show that along the direction of the river fow and the vertical depth, the adsorption capacity presents a relatively obvious spatial distribution law; the change trend of sediment component content is not the same as the change trend of Cu and Zn adsorption capacity. The change trend of the sediment component content is not the same as the change trend of the adsorption amount of Cu and Zn, and the compound efect between the components afects the adsorption amount. The adsorption of Cu by the four groups of sediments after diferent treatments is more in line with the Freundlich isotherm adsorption model; When adsorbing Zn, the untreated and removed organic matter and iron‑aluminum oxide group are in good agreement with the Freundlich model, while the organic matter‑removed group and the iron‑aluminum oxide removal group are more consistent with the Langmuir isotherm adsorption model; The adsorption contribution rate of organic–inorganic composites in sediments is not a simple addition of organic matter and iron‑ aluminum oxides, but a more complex quantitative relationship. -
Special Edition Arabal 2019 Conference
UMINIUM Journal L International A Special Edition Arabal 2019 Conference Alba to host Arabal 2019 Conference The primary aluminium in- dustry in the Gulf region System optimization for emissions reductions in feeding systems for alu- minium electrolysis cells Gautschi Engineering: Technologically up to the mark with the best market participants More efficiency in fur- nace tending operations New protections © Alba against potline freeze 19 to 21 November 2019 2019 Conference L in the Kingdom of Bahrain A B A AR SPECIAL MÖLLER® PNEUMATIC CONVEYING AND STORAGE Reduce emission with Direct Pot Feeding System KEY BENEFITS ֆ Reduced dust emission. ֆ Consistent alumina quality. ֆ No scaling, no attrition and no segregation. We help you to reduce your dust emissions up to Get in touch with us 90% from the pot feeding system to the gas treatment +49 4101 788-124 centre. At the same time your pots will be fed with qqqҶƇmgb\naҶ[igԐgi]ee]l a consistent alumina quality, thanks to the next level of MÖLLER® pneumatic conveying technology. ALUMINIUM · Special Edition 2019 3 SPECIAL AR A B al 2 0 1 9 C O N F E R ence COntent Alba the host of Arabal 2019 Conference ....................... 4 Arabal 2019 – the conference programme ..................... 5 The primary aluminium industry in the Gulf region .......... 6 Successful system optimization for emissions reductions in feeding systems for aluminium electrolysis cells .......... 10 Sohar Aluminium – ‘Smelter of the Future’ .................... 14 EGA: innovative equipment for safe 10 operation of potrooms ............................................... 16 Hertwich supplies multi-chamber melting furnace to Exlabesa ...................................... 20 Innovations in charging and skimming ........................ -
Development of Iceland's Geothermal Energy for Aluminium Production
Development of Iceland’s geothermal energy potential for aluminium production – a critical analysis Jaap Krater1 and Miriam Rose In: Abrahamsky, K. (ed.) (2009) Sparking a World-wide Energy Revolution: Social Struggles in the Transition to a Post-Petrol World. AK Press, Edinburgh. Abstract Iceland is developing its hydro and geothermal resources in the context of an energy master plan, mainly to provide power for expansion of the aluminium industry. This paper tests perceptions of geothermal energy as low-carbon, renewable and environmentally benign, using Icelandic geothermal industry as a case study. The application of geothermal energy for aluminium smelting is discussed as well as environmental and human rights record of the aluminium industry in general. Despite application of renewable energy technologies, emission of greenhouse gases by aluminium production is set to increase. Our analysis further shows that carbon emissions of geothermal installations can approximate those of gas-powered plants. In intensely exploited reservoirs, life of boreholes is limited and reservoirs need extensive recovery time after exploitation, making geothermal exploitation at these sites not renewable in the short to medium term. Pollution and landscape impacts are extensive when geothermal technology is applied on a large scale. Background Iceland is known for its geysers, glaciers, geology and Björk, for its relatively successful fisheries management and its rather unsuccessful financial management. But this northern country also harbours the largest remaining wilderness in Europe, an endless landscape of volcanoes, glaciers, powerful rivers in grand canyons, lava fields, swamps and wetlands teeming with birds in summer, and plains of tundra covered with bright coloured mosses and dwarf willow. -
Subsidies to the Aluminium Industry and Climate Change
THE AUSTRALIA INSTITUTE Background Paper No. 21 Subsidies to the Aluminium Industry and Climate Change Clive Hamilton and Hal Turton Submission to Senate Environment References Committee Inquiry into Australia’s Response to Global Warming, November 1999 The Australia Institute Garden Wing, University House, ANU, ACT 0200 Tel: 02 6249 6221 Fax: 02 6249 6448 Email: [email protected] Website: www.tai.org.au Contents Executive summary 3 1. The aluminium smelting industry and the climate change debate 5 2. Structure of the aluminium smelting industry 6 3. Ownership of the industry 9 4. Electricity pricing and subsidies 13 5. Costs of pollution from the aluminium smelting industry 15 6. Implications of the subsidisation of aluminium smelting industry 17 7. Concluding comments 18 References 20 Appendix 1 Ownership of primary aluminium production in Australia 22 Appendix 2 Aluminium cash price, 1990-1997 25 The Australia Institute 2 Executive summary The aluminium smelting industry accounts for 16% of greenhouse gas emissions from the electricity sector and 6.5% of Australia’s total emissions (excluding land-use change). The aluminium industry has been a strident voice in the debate over climate change policy and has led industry resistance to effective measures to cut emissions. The industry argues that it is of great economic importance to Australia, especially for the foreign exchange its exports earn. It frequently threatens governments with the prospect of closing down its Australian smelters and moving offshore if it is forced to pay higher prices for electricity as a result of climate change policies. Since the Kyoto Protocol was agreed in December 1997, it has argued that the burden for cutting emissions should be placed on other sectors of the economy and households rather than being distributed equally across polluting sectors. -
The Need for Effective Risk Mitigation in Aluminium Plants
PERSPECTIVES THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVETHE NEED RISK FOR MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOREFFECTIVE EFFECTIVE RISK RISK MITIGATION MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATIONIN ALUMINIUM IN ALUMINIUM PLANTS PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATIONRISK ENGINEERING IN DEPARTMENT, ALUMINIUM JUNE 2018 PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVEWWW.TRUSTRE.COM RISK MITIGATION IN ALUMINIUM PLANTS THE NEED FOR EFFECTIVE RISK MITIGATION IN ALUMINIUM PLANTS The need for effective risk mitigation in Aluminium plants Aluminium, the world’s second most preferred metal after iron has a unique combination of qualities. It is lightweight; (approximately one-third the weight of steel for the same volume), has excellent corrosion resistance, and it is non- magnetic with high thermal and electrical conductivity. -
SDS EU 2LI Version #: 02 Revision Date: 01-November-2019 Issue Date: 18-September-2019 1 / 14 Signal Word Danger Hazard Statements H302 Harmful If Swallowed
SAFETY DATA SHEET SECTION 1: Identification of the substance/mixture and of the company/undertaking 1.1. Product identifier Trade name or BaO-CaO-Al2O3 designation of the mixture Registration number - Document number 2LI Synonyms None. Materion Code 2LI Issue date 18-September-2019 Revision date 01-November-2019 1.3. Details of the supplier of the safety data sheet Supplier Company name Materion Advanced Chemicals Inc. Address 407 N. 13th Street 1316 W. St. Paul Avenue Milwaukee, WI 53233 United States Division Milwaukee Telephone 414.212.0257 e-mail [email protected] Contact person Laura Hamilton 1.4. Emergency telephone number Supersedes date 18-September-2019 Version number 02 1.2. Relevant identified uses of the substance or mixture and uses advised against Identified uses Not available. Uses advised against None known. SECTION 2: Hazards identification 2.1. Classification of the substance or mixture The mixture has been assessed and/or tested for its physical, health and environmental hazards and the following classification applies. Classification according to Regulation (EC) No 1272/2008 as amended Health hazards Acute toxicity, oral Category 4 H302 - Harmful if swallowed. Acute toxicity, inhalation Category 4 H332 - Harmful if inhaled. Skin corrosion/irritation Category 1 H314 - Causes severe skin burns and eye damage. Serious eye damage/eye irritation Category 1 H318 - Causes serious eye damage. Hazard summary Causes severe skin burns and eye damage. Harmful if inhaled. Harmful if swallowed. Occupational exposure to the substance or mixture may cause adverse health effects. The material as sold in solid form is generally not considered hazardous. However, if the process involves grinding, melting, cutting or any other process that causes a release of dust or fumes, hazardous levels of airborne particulate could be generated. -
Twenty Compressors Reduce Environmental Impact for Bechtel
CASE STUDY CONSTRUCTION Twenty Overview compressors Client Betchel reduce Location environmental Alcoa Fjaroaal Smelter Project, Fjaroabyggo, East Iceland Application impact for Bechtel Construction phases and operation of aluminium CompAir has proved its cool credentials in Iceland smelting plant thanks to the hot performance of its industrial and portable compressors, which have helped to Products reduce environmental impact by up to 30%. Various portable and industrial compressors, including new C180TS-9 TurboScrews Twenty compressors were purchased as part of an exclusive partnership with global engineering solutions Customer Benefits provider Bechtel and Icelandic engineering specialist Environmental impact reduced/complete equipment HRV, for the construction of one of the world’s largest and service solution from single supplier aluminium smelting plants in Iceland. Complete Equipment Solution vibration for storage tank wall forming and provision of power for general machine tool operation. This included portable Tasked with providing a complete process solution for the C50s, C76s with electrical generators, C105-14 high-pressure construction of the one billion dollar plus Alcoa Fjarðaál units and two revolutionary, fuel saving C180TS-9 TurboScrew Smelter Project, owned by Alcoa, the world’s leading producer models. Bechtel also installed a stationary L30 compressor to of aluminium, Bechtel approached CompAir to provide the run the cathode rodding induction furnace, a key process compressed air solutions required for both the construction -
An Aluminium-Led Energy & Industry Renewal for Central Queensland
1 Clark Butler, Guest Contributor September 2020 An Aluminium-Led Energy & Industry Renewal for Central Queensland A Case Study of Gladstone and Boyne Smelters in Queensland Executive Summary “The full emergence of Australia as an energy superpower of the low-carbon world economy would encompass large-scale early-stage processing of Australian iron, aluminium and other minerals.”1 Australia has the potential to become a much more significant economic power in a decarbonised world. The country’s renewable energy resources sit at the heart of this enormous economic opportunity. Australia could lead the world in producing the components of low-carbon industrialisation: aluminium, steel, cement, silicon, lithium and rare earth minerals, with value-adding Australia could lead the processing before exports to enhance Australian world in producing the investment and employment. components of low- This report explores how the country can both carbon industrialisation. decarbonise and grow heavy industry with a focus on Gladstone, Queensland. The generation of electricity is Australia’s largest source of carbon emissions (33%). Closing the country’s four aluminium smelters would reduce Australian electricity demand by 10% with a consequential reduction in emissions associated with electricity use. However, electricity is also key to the rapid decarbonisation of other major emitting sectors such as transport, heating, industrial processing and manufacturing that account for 55% of the country’s emissions. Instead of closing the country’s loss-making and high emitting aluminium smelters, these industries could transition rapidly to renewable electricity, invest in plant upgrades to support demand response management, and profit from the long-term growth of the metals and industrial processing markets.