Metallurgical Transactions B

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Hot extrusion of aluminum powder at low reduction ratios: Analytical and metallographic studies
Metallurgical Transactions B - Tập 18 - Trang 703-711 - 1987
Ashok Kumar, P. C. Jain, M. L. Mehta
This paper deals with an investigation into the flow of aluminum powder billet during hot extrusion at low reduction ratios through square edge die under axisymmetric conditions. Analytical studies using the finite element method as well as the experimental observations are reported for various low reduction ratios ranging from 1.3:1 to 3.2:1 at extrusion temperatures, 300, 400, and 500 °C; fricti...... hiện toàn bộ
Mathematical simulation of direct reduction
Metallurgical Transactions B - - 1981
Kunhua Yu, Peter P. Gillis
The structure of molten binary silicate systems CaO-SiO2 and MgO-SiO2
Metallurgical Transactions B - Tập 8 - Trang 563-568 - 1977
Yoshio Waseda, J. M. Toguri
The structure of the molten binary CaO-SiO2 and MgO-SiO2 was investigated by means of a high temperature X-ray diffraction technique. From an analysis of the X-ray scattering intensity, the radial distribution function was evaluated from which interionic distances and coordination numbers were calculated. The following features emerge from these results: Molten silicates consist mainly of SiO4 tet...... hiện toàn bộ
A study of the mechanisms of the salt catalyzed carbochlorination of kaolin
Metallurgical Transactions B - Tập 15 - Trang 695-700 - 1984
Arne Landsberg, R. D. Wilson
Continuous weighing of kaolin during carbochlorination has been used to show the superiority of NaCl as a catalyst for increasing the reaction rate and selectivity at 625° to 650 °C, and the possibility of using different types of carbon as a reductant. Initial distribution of NaCl in the kaolin was found to be of importance. A reaction mechanism involving the formation of NaAlCl4 and alumina solu...... hiện toàn bộ
Upgrading copper concentrate by hydrothermally converting chalcopyrite to digenite
Metallurgical Transactions B - Tập 23 - Trang 241-248 - 1992
Robert W. Bartlett
Chalcopyrite in copper flotation concentrates can be hydrothermally converted to digenite directly with oxygen in a continuous process, provided the oxygen supply rate is stoichiomet-rically matched to the chalcopyrite feed rate. Substantial elimination of iron and sulfur can result and may be used to significantly increase smelter copper throughput. A simple process flowsheet is described with on...... hiện toàn bộ
The kinetics of the dissolution of chalcocite in alkaline cyanide solution
Metallurgical Transactions B - - 1977
Robert Francis Shantz, W.W. Fisher
Oxidation of ferrous sulfate in acid solution by a mixture of sulfur dioxide and oxygen
Metallurgical Transactions B - - 1979
Basant L. Tiwari, J. Kolbe, Howard C. Hayden
Comparison of theoretically predicted and experimentally determined submerged arc weld deposit compositions
Metallurgical Transactions B - Tập 14 Số 3 - Trang 510-513 - 1983
U. Mitra, R. D. Sutton, T. W. Eagar
The evidence for a miscibility gap in the Fe3O4-ZnFe2O4 system—A review
Metallurgical Transactions B - - 1988
J. W. Graydon, Donald W. Kirk
Montecarlo calculations of ionic structure in silicate and alumino-silicate melts
Metallurgical Transactions B - Tập 10 - Trang 21-25 - 1979
C. Borgianni, P. Granati
Results on structures of molten silicates and alumino-silicates calculated with the Montecarlo method are reported. The structure of the ions is in agreement with Masson’s hypotheses; in fact ions of the type SinO (3n+1 with chains even 30 + 35 atoms long have been found. The spatial configurations of the polyme...... hiện toàn bộ
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