CHARACTERIZATION OF FINE CRYSTALS IN EVAPORATIVE SALT CRYSTALLIZATION UNDER HIGH SUSPENSION CONDITIONS
Industrial crystallization should be carried out under high suspension conditions in order to obtain NaCl products efficiently. However, under such conditions, the nucleation rate becomes high. Therefore, it is necessary to control the excess number of fine crystals. This study focused on the characteristics of fine crystals generated under high suspension conditions. According to the experimental results, file crystals were classified and the generation mechanisms of fine crystals were discussed with undersaturation condition. Undersaturation condition in this study was carried out by injection of dissolution water. As the results, the following conclusions were obtained. (1) Under high suspension conditions, the influence of abrasion and breakage was greater than under low suspension conditions, and many fine crystals were generated. (2) The fine crystals could be classified into two types according to the shape of fine crystals. The effect of injection of dissolution water was different depending on the shape of fine crystals. (3) The dissolution water was effective for the preferential dissolution of the fine crystals and modification of the crystal surfaces directly related to the fine crystal generation.
evaporative crystallization fine crystals dissolution
Hiroshi TAKIYAMA
Bio-Applications and Systems Engineering (BASE) Tokyo University of Agriculture and Technology (TUAT), JAPAN
国际会议
9th International Symposium on Salt(第九届世界盐业大会)
北京
英文
14-19
2009-09-05（万方平台首次上网日期，不代表论文的发表时间）