Metallurgical Transactions B
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Oxidation of ferrous sulfate in acid solution by a mixture of sulfur dioxide and oxygen
Metallurgical Transactions B - - 1979
Comparison of theoretically predicted and experimentally determined submerged arc weld deposit compositions
Metallurgical Transactions B - Tập 14 Số 3 - Trang 510-513 - 1983
Montecarlo calculations of ionic structure in silicate and alumino-silicate melts
Metallurgical Transactions B - Tập 10 - Trang 21-25 - 1979
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......
The reduction of zinc from slags by an iron-carbon melt
Metallurgical Transactions B - Tập 21 - Trang 885-897 - 1990
An experimental investigation was undertaken to study the mechanism of reduction of zinc from slags in the presence of a carbon-saturated iron melt. Batch tests were performed at 1400 °C, and the variation of the zinc and iron concentration in the slag during reduction was determined by sampling the slag at intervals during the test. In graphite crucibles, zinc in slags containing iron was reduced......
Model for ferric sulfate leaching of copper ores containing a variety of sulfide minerals: Part I. Modeling uniform size ore fragments
Metallurgical Transactions B - Tập 23 Số 5 - Trang 537-548 - 1992
A computer model was constructed for bacterial ferric sulfate leaching of the major sulfides found in porphyry copper deposits. Leaching occurs by reactions with ferric ion diffusing into the rock fragment. The model incorporates the reaction kinetics of the individual minerals and keeps material and energy balances. The model is needed to aid in the design of modifiedin situ leaching operations a......
Reducibility of laterite ores
Metallurgical Transactions B - Tập 19 - Trang 181-186 - 1988
The reducibility of several types of lateritic nickel bearing ores was investigated. The ores were reduced with hydrogen over a temperature range of 673 to 1273 K and reaction times from 5 to 80 minutes. The fraction of nickel, iron, and cobalt reduced to the metallic state was determined by leaching the reacted samples with a bromine-methanol solution followed by atomic absorption analysis for th......
On the aluminothermic reduction of calcium vanadate
Metallurgical Transactions B - Tập 8 - Trang 683-685 - 1977
Thermodynamic behavior of phosphorus in CaO-CaF2-SiO2 and CaO-Na2O-SiO2 systems
Metallurgical Transactions B - Tập 22 - Trang 499-502 - 1991
In order to understand the thermodynamic behavior of phosphorus, such as the polymerization of phosphate ions in slag melts, the influence of phosphorus content of slag melts on the partition of phosphorus between slags and carbon-saturated iron or silver was investigated for the CaO-CaF2-SiO2 and CaO-Na2O-SiO2 systems at 1573 and 1473 K, respectively. The predominant species changes from PO
......
An analytical technique for the determination of the thermal contact resistance between a solidifying metal and mold
Metallurgical Transactions B - Tập 8 - Trang 619-624 - 1977
In the classical solution to one-dimensional solidifications Schwarz showed that in the case of perfect thermal contact the interface temperature between the mold and solidifying material is constant. Adams hypothesized that in the case of real casting problems where there is imperfect thermal contact, that one could still use the interface temperature computed by Schwarz’s solution but now acting......
Acid dissolution of willemite (Zn, Mn)2 SiO4) and hemimorphite (Zn4Si2O7(OH)2 H2O)
Metallurgical Transactions B - Tập 14 - Trang 335-346 - 1983
The influence of temperature, pH, acid type, and surface area on the kinetics of the acid dissolution of natural and synthetic willemites and natural hemimorphites has been investigated. Specific rate constants, based upon areas determined by krypton adsorption measurements, were estimated from the experimental data obtained. For both willemite and hemimorphite, the rates of dissolution in differe......
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