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Canadian Metallurgical Quarterly
The Canadian Journal of Metallurgy and Materials Science
Volume 54, 2015 - Issue 4
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Technical Letters

On the assimilation mechanism of additives used in non-ferrous metals extraction processes

Pages 494-499 | Received 25 Mar 2015, Accepted 24 May 2015, Published online: 04 Mar 2016
 

Abstract

The assimilation mechanism of various additives used in non-ferrous metals extraction practices is examined. The most important factor for additive assimilation is the condition at the additive–solution interface. The additives were classified into three major groups based on the predominant transfer of additive from solid to liquid, which can be characterised as melting or dissolution. The thermochemical tests showed that the assimilation mechanism can be subdivided into four major periods: initial temperature drop, exo/endothermic peak, post-reaction temperature convalescing and settling period.

On examine le mécanisme d'assimilation d'additifs variés utilisés en pratique dans l'extraction de métal non ferreux. Le facteur le plus important de l'assimilation d'additif est la condition à l'interface additif/solution. On a classifié les additifs en trois groupes majeurs basés sur le transfert prédominant du solide au liquide de l'additif et qu'on pouvait caractériser comme fusion ou comme dissolution. Les essais thermochimiques ont montré qu'on pouvait subdiviser le mécanisme d'assimilation en quatre périodes majeures: baisse de température initiale, pic exo/endothermique, température de convalescence après la réaction et périod

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