【摘要】 作者根据化学热力学原理证明碳酸铵与天青石的复分解反应可在常温下进行。矿粉经除钙、复分解转化除钡,除铁、沉淀、洗涤等,制得符合出口标准的碳酸锶产品。本工艺有节能、降低成本及设备投资等优点。更多还原

【Abstract】 Powdered celestite was mixed withsolution of calcium-removing agent,stirredand filtered, and then the precipitate waswashed and mixed with（NH₄）₂CO₃ solutionat room temperature for transformation.The precipitate was filtered and washed toobtain crude SrCO₃, which was thendissolved in 6N HCl and filtered at pH6-7 to remove Fe. The filtrate was mixedwith a saturated solution of （NH₄）₂CO₃ or（NH₄）HCO₃ at pH 9 and filtered, and theprecipitate was washed and dried to obtainpure SrCO₃.更多还原