CAJ | 학술논문

利用碳酸钙、碳酸镁、碳酸锂在溶液中的溶度积的差异，研究了用碳酸钠从吸附法盐湖卤水提锂所得高锂溶液中去除钙、镁离子，考察了反应时间、碳酸钠用量、体系pH及晶种循环方式对钙、镁去除率的影响。试验结果表明：用质量浓度为50 g／L的碳酸钠溶液，在反应时间30 min、碳酸钠用量为沉淀钙、镁所需理论量、溶液p H为11．5，采用晶种循环方式改善过滤性能条件下，钙、镁去除率分别为98．8％和99．98％，所得溶液中，Ca2＋质量浓度为9 mg／L ，M g2＋质量浓度为0．7 mg／L ，整个除杂过程锂损失仅为3％左右。
이용탄산개、탄산미、탄산리재용액중적용도적적차이，연구료용탄산납종흡부법염호서수제리소득고리용액중거제개、미리자，고찰료반응시간、탄산납용량、체계pH급정충순배방식대개、미거제솔적영향。시험결과표명：용질량농도위50 g／L적탄산납용액，재반응시간30 min、탄산납용량위침정개、미소수이론량、용액p H위11．5，채용정충순배방식개선과려성능조건하，개、미거제솔분별위98．8％화99．98％，소득용액중，Ca2＋질량농도위9 mg／L ，M g2＋질량농도위0．7 mg／L ，정개제잡과정리손실부위3％좌우。
By the solubility differences of calcium carbonate ,magnesium carbonate and lithium carbonate ,removing calcium and magnesium ions from high lithium solution was studied .The effects of reaction time ,sodium carbonate dosage ,solution ,pH and seed circulation style on the removal of impurities w ere investigated . T he results show that at the conditions of sodium carbonate concentrations of 50 g/L ,reaction time of 30 min ,sodium carbonate dosage as much as the theoretical amount for precipitation of calcium and magnesium ,adjusting the pH to 11 .5 ,the crystal cycle ways , removal rates of calcium and magnesium are 98 .8% and 99 .98% ,respectively .The high lithium solution with Ca2+ concentration of 10 mg/L and Mg2+ concentration of 0 .7 mg/L can be obtained . T he lithium loss in the process is only about 3% .