Carbothermic Reduction of Alumina and Aluminous Ores, and Effects of Several Additional Materials (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores)

Kikuchi, Takeaki; Ochiai, Sadayuki; Kurosawa, Toshio; Yagihashi, Tetsuo

doi:10.2320/jinstmet1952.34.6_643

Cited by 4 publications

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“…Although the properties of Al4O4C have been well established, we can recognize that there appears some uncertainty and ambiguity about the understanding of the occurrence of Al2OC. Kikuchi et al (9) reported no formation of Al2OC in the reduction of alumina with carbon up to 2270 K, while Foster et al (7) and Ginsberg and Sparwald(12) reported its formation (above about 2200 K) in the reaction of alumina with carbon or with aluminum carbide. In the measurements of the equilibrium pressure of carbon monoxide in the Al-O-C system, Motzfeldt and Sanberg(8) detected no Al2OC phase, and suggested that Al2OC may be chemical-thermodynamically unstable at high temperatures.…”

Section: Aluminum Monoxycarbidementioning

confidence: 99%

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

et al. 1982

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Section: Aluminum Monoxycarbidementioning

confidence: 99%

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

et al. 1982

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“…Comparison of reduction ratio of MgO among the reducers of ferro-silicon, crude alloy and reaction residue. (Reduction temperature indicates the X-ray patterns of the products.ever, the new peaks which mostly belonged to the peaksIn the previous test(4), in which only bauxite and carbon were used, the peaks of aluminum alloy could be detected slightly at. temperatures higher than 2000 efficient in this process.…”

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confidence: 90%

Extraction of Aluminum from Crude Aluminum Alloy by the Subchloride Process

1972

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The extraction of aluminum was carried out by the subchloride process.The source material was the crude aluminum alloy prepared from colloidal earth and bauxite by the use of a 70 kVA electric furnace.The extraction ratio of aluminum increased as the size of alloy particles is smaller and the supply of aluminum trichloride is larger, and reached more than 90%Furthermore, its ratio depended not only on the aluminum content in the alloy but also on the Fe/Si ratio. The reaction ratio of aluminum trichloride decreased with increase in its supply and decrease in temperature, but it increased when the reaction zone was extended.The deposited aluminum contained small amounts of silicon and iron, in which the content of silicon was larger than that of iron. The purity of aluminum was higher than 99.6%. Furthermore, the extracted aluminum was melted and made into a thin plate by rolling.

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Carbothermic Reduction of Bauxite and Colloidal Earth by Girod and Héroult Furnaces (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores (V))

1971

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As a part of the study relating to direct reduction of aluminum, the preparation of aluminum alloy was carried out by means of the 10kVA Girod and the 70kVA Heroult furnace using bauxite and colloidal earth, and the reduction process and operational conditions were clarified.During the preliminary treatment of the source materials, it became clear that briquetting and pelletizing were more effective to make the reduction easier and to obtain a more uniform tapped alloy than in the case of the separate charge of bauxite and colloidal earth. In addition, a larger amount of the alloy with a higher aluminum content in the tapped metal was obtained from the mixture.The differences in the carbonaceous materials among charcoal, coal and cokes were not made clear.The alloy containedFe2O3 was about twice greater than them. Chemical and X-ray analysis of the residual matter showed that the alloy was formed mainly between aluminum oxide and silicon carbide.

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Carbothermic Reduction of Alumina and Aluminous Ores, and Effects of Several Additional Materials (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores)

Cited by 4 publications

References 0 publications

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

Extraction of Aluminum from Crude Aluminum Alloy by the Subchloride Process

Carbothermic Reduction of Bauxite and Colloidal Earth by Girod and Héroult Furnaces (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores (V))

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Carbothermic Reduction of Alumina and Aluminous Ores, and Effects of Several Additional Materials (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores)

Cited by 4 publications

References 0 publications

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

Reduction of Alumina: Effect of Silicon Compounds on Oxycarbide Behavior

Extraction of Aluminum from Crude Aluminum Alloy by the Subchloride Process

Carbothermic Reduction of Bauxite and Colloidal Earth by Girod and H&eacute;roult Furnaces (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores (V))

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Carbothermic Reduction of Bauxite and Colloidal Earth by Girod and Héroult Furnaces (Studies on the Production of Crude Aluminum Alloy by the Direct Reduction of Aluminous Ores (V))