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- W2027123522 abstract "A theoretical study is reported on the use of d.c. and r.f. plasma jets as chemical reactors for the processing of minerals in the form of a fine powder. The temperature and flow fields of the jet are calculated by solving the integral boundary layer equations. Single particles trajectories are obtained by solving the Basset-Odar equations. A multi-particle model is then developed for a feed of known particle size and injection velocity distributions under low loading conditions. Calculators are made on the thermal decomposition of molybdenum disulphide (5 to 30-micron equivalent diameter). The parameters investigated are the free jet velocity, the mean injection velocity, and the reactor ambient conditions. The results are presented as the probability density distributions of the gas loading, particle temperature, and conversion at different levels downstream of the nozzle. On présente une étude théorique sur l'emploi de jets de plasma produits par courant direct et radio-fréquence comme réacteurs chimiques pour le traitement des minéraux sous forme de poudres fines. On calcule les champs de température et d'écoulement du jet en résolvant les équations intégrates de la couche-limite. On obtient les trajectoires des particles simples au moyen de la solution des équations de Basset et Odar. On a mis au point un modèle pour une alimentation de particules de dimensions connues et des distributrions de la vitesse d'injection lorsqu'on est en présence de peu de matières solides. On fait les calculs sur la décomposition thermique du sulfure de molybdène (dont le diamètre équivalent est de 3 à 30 microns). Les paramètres étudiés sont: la vitesse du jet libre, la vitesse moyenne d'injections et les conditions ambiantes du réacteur. On présente les résultats sous forme de distributions des densités de probabilité de l'alimentation de gaz, de la température des particles et de la transformation à différents niveaux en aval du jet." @default.
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- W2027123522 date "1974-06-01" @default.
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- W2027123522 title "Powder processing in a plasma jet: A proposed model" @default.
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- W2027123522 doi "https://doi.org/10.1002/cjce.5450520309" @default.
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