Effects of thermal pre-treatment and ore dryness on the recovery of lanthanides from ion-adsorption clays
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- 作者：Georgiana A. Moldoveanu georgiana.moldoveanu@utoronto.ca" class="auth_mail" title="E-mail the corresponding author ; Vladimiros G. Papangelakis ; vladimiros.papangelakis@utoronto.ca" class="auth_mail" title="E-mail the corresponding author
- 关键词：Clay thermal treatment ; Ion-adsorption clays ; Ion-exchange leaching ; Rare earth recovery ; Lanthanides ; Rare earth elements
- 刊名：Hydrometallurgy
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：158
- 期：Complete
- 页码：180-185
- 全文大小：705 K
文摘
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Effect of thermal pre-treatment on rare earth recovery from ionic clays was studied.
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Macro- and microstructural changes occurring in clays during heating were identified
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Rare earth recovery increased with the temperature up to 300 °C, then decreased.
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Improved clay permeability due to loss of adsorbed water in the interval 100–300 °C
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Dehydroxylation and structural loss over 500 °C led to REE fixation to the surface.