STUDY ON THE PRODUCTION TECHNOLOGY OF SULPHATE-POTASSIUM MAGNESIUM FROM JINAIER SALT LAKE BRINE IN QINGHAI
Based on the phase diagram of Na+,K+,Mg2+//Cl-,SO42- - H2O system at 25℃ and 50℃, a technology was developed to produce sulphate-potassium magnesium from Jinaier salt lake brine in Qinghai. At the first-stage transformation, the recover rate of potassium was up to 77.17％. The optimal conditions were: the operational temperature was 50℃, the mixing time was 120 min. and the stirred speed was 600 rpm.. The purpose of the second-stage transformation was to eliminate chloride in the product, in which the solid phase of the first-stage transformation was used. The temperature used in experiment for the second-stage transformation was at 25℃, the mixing time was 60 min. and the stirred speed was 600 rpm.. Under these conditions the recover rate of potassium was more than 60.36％ and the removal rate of chloride was 67.42％. The experimental results offered a sound foundation for a technology in producing sulphate-potassium magnesium product with higher potassium and lower chloride from Jinaier salt lake brine in Qinghai.
sulphate-potassium magnesium fertilizer phase diagram Jinaier salt lake
TANG Na SHI AIHUA WANG Xuekui SHA Zuoliang
College of Marine Science and Engineering, Tianjin University of Science & Technology,Tianjin 300457, China Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin 300457, China
国际会议
9th International Symposium on Salt(第九届世界盐业大会)
北京
英文
1149-1159
2009-09-05（万方平台首次上网日期，不代表论文的发表时间）