中文摘要：

将传统湿法磷酸的浸取过程分为磷矿分解和石膏结晶两个过程，分别在两个化学反应器中进行。在这两个相互独立的反应器中间添加液固分离装置，不仅能使副产物磷石膏的白度提高到95％以上，而且，在结晶反应温度为90℃、硫酸质量分数为30％、加料方式采用一次性加料、陈化时间为40min、搅拌强度为250r／min条件下，能得到长径比达到50以上的磷石膏晶须。

英文摘要：

Traditional wet-process phosphoric acid （WPA） leaching process was divided into two processes,i, e. phosphorite decomposition and gypsum crystallization, which were carried out in two individual chemical reactors. Liquid-solid separation devices were installed in the middle of these two independent reactors, which not only made white content of the by-product phosphogypsum increase to more than 95%, but also phosphogypsum whisker with slenderness ratio of more than 50 could be obtained under the conditions of crystallization temperature at 90 ℃ ,30% （ mass fraction） sulfuric acid,one - off feeding way, aging time of 40 min, and stirring intensity of 250 r/min.