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Aluminothermic Reduction of Quartz Sand
1982The exothermic reaction of quartz with aluminum is a promising way to make high purity silicon on a large scale — according to 3 Si02 + 4 Al ➙ 2 Al203 + 3 Si A suitable technical process on this basis requires liquid phases of both oxidic and metallic nature acting as solvents for the reaction products.
J. Dietl, C. Holm, E. Sirtl
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Influence of Titanium Carbide on Properties of Aluminothermic Mixture
Materials Science Forum, 1998Influence of different additives on chemical composition and mechanical characteristics of steel castings obtained by aluminothermic reaction has been investigated. A simple and fast production of titanium carbide (TiC) from carbon and titanium powders by self-propagating high temperature synthesis have been explained.
Todorović, M, Trtanj, M, Maksimović, Z
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The aluminothermic reduction of boric acid
International Journal of Refractory Metals and Hard Materials, 2010Abstract The effect of metallic aluminium powder on the production of boron carbide–alumina composite was studied. Boric acid, carbon and aluminium powders were mixed in stoichiometric ratio, ball milled and heat treated at temperatures between 1300 and 1650 °C for 1–5 h in the presence of argon flow.
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On the aluminothermic reduction of calcium vanadate
Metallurgical Transactions B, 1977In the aluminothermic reduction of m e t a l oxide, calcium oxide is often used as a flux. The calcium oxide instead of forming an extraneous addition can sometimes be present in chemical combination with the m e t a l oxide. A familiar example is the aluminothermic reduction of calcium tungstate for the production of ferrotungsten. It has been stated1
Omprakash K. Mehra, Chiranjib K. Gupta
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Production of Strontium through a Vacuum Aluminothermic Process
Mining, Metallurgy & Exploration, 2020The production of strontium (Sr) metal from its oxide via an aluminothermic process under 1–5 mbar pressure was examined in this study. SrO of 99% purity by weight was used in the experiments. The effects of stoichiometry and the duration of the process on the efficiency ratio of the metallic strontium were examined. The effects of functional additives
Mehmet Bugdayci +3 more
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Aluminothermic production of metals and alloys
JOM, 1972Aluminum is a more expensive reductant than carbon or silicon, but the product is purer. Is the next step titanium-aluminum alloys?
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Mechanism of zinc oxide–aluminum aluminothermic reaction
Journal of Materials Science, 2010In this study, the aluminothermic reaction of a mixture of aluminum and zinc oxide powders ball milled at ambient temperature was investigated employing X-ray diffraction (XRD), differential thermal analysis (DTA), and electron microscopy (SEM) techniques.
Ali Maleki +3 more
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New Aspects in Aluminothermic Reduction of SiO2
1987This paper reports on a processing sequence in which the production of silicon by aluminothermic reduction of quartz sand is conducted in a flux system at temperatures above the melting point of silicon. The flux — for instance calcium silicate — serves simultaneously as a solvent for the aluminum oxide formed and as a liquid-liquid extraction medium ...
J. Dietl, C. Holm
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Mechanically activated aluminothermic reduction of titanium dioxide
International Journal of Self-Propagating High-Temperature Synthesis, 2009Addressed is the effect of ball milling on aluminothermic reduction of TiO2. In 0.5-h milled 3TiO2 + Al mixtures, a two-step reaction was found to yield TiAl and Ti3Al. Upon an increase in the milling time (to 20 h), a one-step reaction yielded TiAl. The activation energy for TiAl formation was 75 kJ mol−1 for 0.5-h milled samples and 33 kJ mol−1 for ...
A. R. Kamali, J. Fahim
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Mathematical Model of Iron Reduction with Aluminothermic Method
Advanced Materials Research, 2014Utilization of industrial waste in foundry engineering is one of approaches for decrease of production cost price. This technological process may be based on exothermic oxidation-reduction reaction with the resulting formation of iron from dross. Initial charge mixture consists of dispersed aluminum, iron dross and admixtures.
Dmitrii A. Potianikhin, Oleg N. Komarov
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