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 ›› 2021, Vol. 53 ›› Issue (8): 50-54.doi: 10.19964/j.issn.1006-4990.2020-0532

• 研究与开发 • 上一篇    下一篇

大颗粒氯化钾聚结结晶及其粒径控制

万俊峰1,2(),董伟兵1,2,陈许龙2,3,杜景灵2,3,王刚1,2()   

  1. 1.青海民族大学化学化工学院,青海西宁,810007
    2.国家民委青藏高原资源化学与生态环境保护重点实验室
    3.青海民族大学物理与电子信息工程学院
  • 收稿日期:2020-09-27 出版日期:2021-08-10 发布日期:2021-08-11
  • 作者简介:万俊峰(1992— ),男,硕士,研究方向为工业结晶;E-mail: wanjunfeng2020@163.com
  • 基金资助:
    青海省重点研发与转化计划-科技合作专项(2018-HZ-818);青海省自然科学基金(2019-ZJ-901);青海民族大学自然科学基金(2018XJG01);青海民族大学科研创新团队专项经费资助(2019XJZD01);青海民族大学2020年度校级本硕博(学生)项目(2020XJXS08)

Coalescence crystallization of large particle KCl and its particle size control

Wan Junfeng1,2(),Dong Weibing1,2,Chen Xulong2,3,Du Jingling2,3,Wang Gang1,2()   

  1. 1. School of Chemistry and Chemical Engineering,Qinghai Nationalities University,Xining 810007,China
    2. Key Laboratory of Resource Chemistry and Eco-environmental Protection in Tibetan Plateau(Qinghai Nationalities University),State Ethnic Affairs Commission
    3. School of Physics and Electronic Information Engineering,Qinghai Nationalities University
  • Received:2020-09-27 Published:2021-08-10 Online:2021-08-11

摘要:

利用聚焦反射光束测量技术(FBRM)测定了氯化钾在水中的溶解度,研究了在转速为250 r/min时,颗粒氯化钾晶体的制备及其粒径控制的规律,并考察了在此转速下溶液中氯化钾聚结过程中初级粒子、降温速率、过饱和度对聚结的影响。研究结果表明:氯化钾溶解度随温度升高而增大;降温速率越快,溶液瞬时过饱和度越大,越易爆发成核,产生的粒子数越多;初级粒子在每100 mL溶液的最佳添加量为0.05~0.1 g时,制备的晶体平均粒径可达1 900~2 000 μm,产品粒径较大,球形度也较好。

关键词: 大颗粒氯化钾, 聚结结晶, 初级粒子, 降温速率, 过饱和度

Abstract:

The solubility of potassium chloride in water was measured by focused reflection beam measurement(FBRM).The preparation of KCl particle crystals and its particle size control rule under speed of 250 r/min were studied.The effects of con-sumption of primary particles,cooling rate and supersaturation on the coalescence of KCl in solution at this speed were inves-tigated.The results showed that: the solubility of potassium chloride increased with the increase of temperature;the faster the cooling rate led to the greater the instantaneous supersaturation of solution,the easier nucleation led to produce more parti-cles;when the optimal addition amount of primary particles was 0.05~0.1 g in 100 mL solution,the average particle size of the prepared crystal could reach 1 900~2 000 μm and the product had moderate particle size and good sphericity.

Key words: large particles of potassium chloride, coalescence crystallization, primary particles, cooling rate, supersaturation

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