Strategies for calcium sulphate scale control in hydrometallurgical processes at 80 掳C
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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：Scale control ; Chemical precipitation ; Calcium sulphate ; Gypsum ; Anhydrite ; Calcium removal
- 刊名：Hydrometallurgy
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：157
- 期：Complete
- 页码：133-139
- 全文大小：1009 K
文摘
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Na2CO3, H2C2O4, Na2C2O4 and Na3PO4 in 1:1 stoichiometric ratios with respect to calcium were investigated
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The kinetics and selectivity of the precipitation process were evaluated
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Na2CO3 and Na2C2O4 selectively lowered calcium concentration below the solubility limit of calcium sulphate at 80 °C
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Excess of H2C2O4 was required in order to achieve similar calcium removal levels while Na3PO4 proved inefficient
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Na2CO3 and Na2C2O4 in 2:1 ratios lowered calcium concentration below the solubility limit of calcium sulphate at 140 °C