Hazardous aluminum dross characterization and recycling
Aluminum dross, a mixture of oxides, salts, and elemental aluminum, is a typical waste generated during aluminum smelting process. It has been classified into There are two types of aluminum dross including primary dross (also called white dross or wet dross) (Abdulkadir et al., 2015) and secondary dross (other Enhanced alumina recovery from secondary aluminum
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Synthesis of Ferroalloys via Mill Scale-Dross-Graphite Interaction
Abstract: Mill scale and aluminum dross are the industrial wastes from steel and aluminum industries, which have high concentrations of Fe2O3 and Al2O3, respectively. This paper Mill scale and aluminum dross are the industrial wastes from steel and aluminum industries, which have high concentrations of Fe 2 O 3 and Al 2 O 3, Synthesis of Ferroalloys via Mill Scale-Dross-Graphite MDPI
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(PDF) Synthesis of Ferroalloys via Mill Scale-Dross-Graphite
Mill scale and aluminum dross are the industrial wastes from steel and aluminum industries, which have high concentrations of Fe2O3 and Al2O3, respectively. Dross is an unavoidable by-product of the aluminum production. It forms at the surface of the molten metal as the latter reacts with the furnace atmosphere. Comparison of salt-free aluminum dross treatment processes
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Plasma assisted synthesis of γ-alumina from waste
γ-alumina 1. Introduction The primary production of aluminium is by electrolysis of purified alumina. The first step is production of pure aluminium oxide from In this study, an attempt was made to treat aluminium dross using plasma arc melting process. The aluminium dross was melted and evaporated by the plasma Plasma assisted synthesis of γ-alumina from waste aluminium dross
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(PDF) Synthesis of Ferroalloys via Mill Scale-Dross-Graphite
Scale and dross were mixed with graphite into three different C/O molar ratios of 1, 1.5, and 2 to produce a pellet. The pellets were heated at 1550 °C for up to 6 h under an argon atmosphere.In 2008, around 596,000 tons of aluminium dross was generated from secondary aluminium industry in China in which approximately 95% of the dross was land filled without treatment (Hong et al., 2010). Model calculations of European recycling aluminium industry carried out in 2006 indicated that about 8–9% of aluminium is Plasma assisted synthesis of γ-alumina from waste aluminium dross
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Aluminium dross/soda lime glass waste-derived high-quality
In this work, Al-dross as-received from an aluminum industry which comprised of predominantly Al 2 O 3,MgAl 2 O 4 and AlN, was used to develop the refractories.With the rapid development of the aluminum reduction industry, the amount of carbon dust, aluminum dross and spent potlining generated in the aluminum reduction process has also increased. It is estimated that 8–12 kg of carbon dust, 10–12 kg of aluminum dross, and 20–30 kg of spent potlining will be produced for each ton of Characteristic Analysis of Hazardous Waste from Aluminum Reduction Industry
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Aluminum dross oxide products for the portland cement industry
@article{osti_197302, title = {Aluminum dross oxide products for the portland cement industry}, author = {Zuck, D A}, abstractNote = {Recovery of aluminum metal from drosses is a major factor in the recyclability success story enjoyed by the United States aluminum industry. Today`s modern dross processor uses the latest technology The comparison of the salt-free dross processing methods. The technologies, just described, have been characterized by their different operating conditions such as the nature of the heating source, the furnace atmosphere, the type of dross treated, hot or/and cold, the type of treatment vessel, in one case the presence of cooling water, etc.Comparison of salt-free aluminum dross treatment processes
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Recovering aluminum from aluminum dross in a DC electric-arc
aluminum dross can be divided into two periods, which are carried out with dif-ferent power. Period I In period I, 50 kg of aluminum dross is charged into the electric-arc rotary furnace (1/3 to 1/2 of the furnace size). The electric arc is ignited between the two graphite electrodes and the furnace starts rotating periodically. At the begin-The valorization of aluminum dross for Al recovery was performed via its mixing with metallic copper to produce Al-Cu alloys. This approach was with the intention of establishing a new smelting process to treat the dross with Cu scrap use. To evaluate the high temperature interaction of the materials, the wettability of a Cu-containing Materials Free Full-Text Valorization of Aluminum Dross with
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Salt Free Treatment of Aluminium Dross Scientific.Net
Aluminium dross is composed of metallic aluminium and non-metallic compounds such as oxides, nitrides and carbides. The dross created during primary and secondary aluminium production can amount up to 1% of the total tonnage and may contain up to 90% aluminium metal. The conventional procedure for dross treatment is to use salt for separating the Crystal Structure and Element Composition of Oxide from Dross. Although the majority of aluminium oxide is in the α-form, one must remember that the primary oxide for the electrolysis also contains 1–2% of α in addition to the 98–99% γ-type which is the desired crystal type. By blending 0.25% of oxide from plasma rotary furnace drossRecycling of Oxide from Dross into Aluminum Electrolysis Cells
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A rotary arc furnace for aluminum dross processing OSTI.GOV
Hydro-Quebec has developed and patented a new salt-free technology using a rotary furnace heated by an electric arc between two graphite electrodes, called DROSCAR {reg_sign}. A 600-kW pilot plant in operation at LTEE is in use to demonstrate the process. This process provides aluminum recovery rates over 90%, using a highly Aluminum baths are always covered with a layer of dross resulting from the aluminum surface oxidation. This dross represents 1–10% of the melt and may contain up to 75wt.% aluminum.Comparison of salt-free aluminum dross treatment
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Dissolution characteristics of black aluminum dross in Na
Black aluminum dross (BAD) is a hazardous solid waste produced during aluminum processing and recycling, with an annual output of approximately 1 million tons in China's aluminum industry [].BAD has dual properties, as both pollutant and resource [].It has low density and large specific surface area, easily absorbs moisture, and contains In 2008, around 596,000 tons of aluminium dross was generated from secondary aluminium industry in China in which approximately 95% of the dross was land filled without treatment (Hong et al., 2010). Model calculations of European recycling aluminium industry carried out in 2006 indicated that about 8–9% of aluminium is Plasma assisted synthesis of γ-alumina from waste aluminium dross
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Synthesis of Ferroalloys via Mill Scale-Dross-Graphite MDPI
Mill scale and aluminum dross are the industrial wastes from steel and aluminum industries, which have high concentrations of Fe2O3 and Al2O3, respectively. This paper reports the conversion of reducible metal oxides in scale and dross into an alloy via carbothermic reduction at 1550 °C. Scale and dross were mixed with graphite into Aluminium dross, an industrial by-product generated in large quantities, is fairly rich in aluminium content. Even though there are means of recycling (pyrometallurgical and hydrometallurgical routes), still a large amount of aluminium dross is landfilled. This research article emphasizes on recycling of aluminium dross by the Recycling of White Aluminium Dross: Production of Potash Alum
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Synthesis of Ferroalloys via Mill Scale-Dross-Graphite MDPI
Mill scale and aluminum dross are the industrial wastes from steel and aluminum industries, which have high concentrations of Fe2O3 and Al2O3, respectively. This paper reports the conversion of reducible metal oxides in scale and dross into an alloy via carbothermic reduction at 1550 °C. Scale and dross were mixed with graphite into @article{osti_5029178, title = {Experimental processing of salt slags from an aluminum dross furnace}, author = {Magyar, M J and Kaplan, R S and Makar, H V}, abstractNote = {The Federal Bureau of Mines has developed a hydrometallurgical method to recover aluminum, aluminum oxide, and fluxing salts from aluminum salt slags. The slag is Experimental processing of salt slags from an aluminum dross
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The SPL Waste Management Challenge in Primary Aluminum
By Alton Tabereaux, Contributing Editor. Spent potlining (SPL) disposal is one of the largest environmental waste management challenges confronting worldwide primary aluminum smelters due to its toxicity. The International Aluminium Institute (IAI) asserts that 1.6 million tons of SPL were generated from primary aluminum production WO 97/39155 discloses the DROSRITE process for processing aluminium dross. Hot dross is charged to a pre-heated refractory-lined rotary furnace immediately after skimming from the aluminium holding furnace. The DROSRITE furnace is sealed and maintained under an argon atmosphere.ALUMINIUM DROSS PROCESSING TAHA INTERNATIONAL SA
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