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首页> 外文期刊>Fluid Phase Equilibria >Development of an MSE-based chemical model for the solubility of calcium sulphate in mixed chloride-sulphate solutions
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Development of an MSE-based chemical model for the solubility of calcium sulphate in mixed chloride-sulphate solutions

机译：基于MSE的硫酸钙在混合氯化物-硫酸盐溶液中的溶解度化学模型的开发

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摘要

A recently developed mixed-solvent electrolyte (MSE) model to describe the chemistry of calcium sulphate in aqueous multi-component sulphate solutions has been extended to complex mixed chloride-sulphate solutions. The model accurately represents the solubility of calcium sulphate solid phases, namely dihydrate, hemihydrate and anhydrite, in mixed chloride-sulphate solutions containing H2SO4, Fe-2(SO4)(3), HCl, NaCl, Na2SO4, MgO2, MgSO4, CaCl2, etc., over a wide range of temperatures and ionic strengths. It predicted the solubility of calcium sulphate from 20 to 95 degrees C in simulated nickel processing solutions containing NiSO4, H2SO4, Fe-2(SO4)(3), Na2SO4 and LiCl. It was found that increasing Na2SO4 or LiCl concentrations in NiSO4-H2SO4 solutions do not have a significant effect on the calcium sulphate solubility. The model was shown to be a practical tool for assessing the scaling potential of calcium sulphate over a wide range of temperatures and concentrations where experimental data are not available.
机译：最近开发的用于描述多组分硫酸盐水溶液中硫酸钙化学性质的混合溶剂电解质（MSE）模型已扩展到复杂的混合氯化物-硫酸盐溶液。该模型准确地表示了硫酸钙固相（即二水合物，半水合物和无水石膏）在含有H2SO4，Fe-2（SO4）（3），HCl，NaCl，Na2SO4，MgO2，MgSO4，CaCl2，等在很宽的温度和离子强度范围内。它预测了硫酸钙在20至95摄氏度下在含NiSO4，H2SO4，Fe-2（SO4）（3），Na2SO4和LiCl的模拟镍加工溶液中的溶解度。已发现增加NiSO4-H2SO4溶液中Na2SO4或LiCl的浓度对硫酸钙溶解度没有显着影响。该模型被证明是评估在没有实验数据的广泛温度和浓度范围内硫酸钙结垢潜力的实用工具。

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