无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (10): 51-.

• 论文 • 上一篇    下一篇

一种副产石膏晶须的湿法磷酸新工艺

高学顺,陈江,陈学玺   

  1. 青岛科技大学,山东青岛 266042
  • 发布日期:2011-10-19

New technology of by-producting gypsum whisker in wet-process phosphoric acid production

 GAO  Xue-Shun, CHEN  Jiang, CHEN  Xue-Xi   

  1. Qingdao University of Science and Technology,Qingdao 266042,China
  • Published:2011-10-19

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40 min、搅拌强度为250 r/min条件下,能得到长径比达到50以上的磷石膏晶须。

关键词: 湿法磷酸, 磷石膏, 石膏晶须

Abstract: 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. 

Key words: WPA, phosphogypsum, gypsum whisker

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