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 ›› 2023, Vol. 55 ›› Issue (12): 50-58.doi: 10.19964/j.issn.1006-4990.2023-0051

• 研究与开发 • 上一篇    下一篇

生石灰消化反应条件对氢氧化钙特性影响

熊爽1(), 严金生2, 周洲2, 周保弟3, 陈小鹏1, 童张法1()   

  1. 1.广西大学化学化工学院,广西 南宁 530004
    2.崇左南方水泥有限公司广西钙基材料协同创新中心,广西 南宁 530004
    3.桂林矿山机械有限公司,广西 桂林 541213
  • 收稿日期:2023-02-06 出版日期:2023-12-10 发布日期:2023-12-14
  • 通讯作者: 童张法(1963— ),男,教授,博士生导师,研究方向为无机非金属材料;E-mail:zhftong@sina.com
  • 作者简介:熊爽(1997— ),女,硕士,研究方向为无机非金属材料;E-mail:924997876@qq.com
  • 基金资助:
    国家自然科学基金资助项目(52162004);广西钙基材料协同创新研究项目(CZNF-JSZX20-3);桂林市重点研发计划项目(20210210-5)

Effect of reaction conditions of quicklime digestion on properties of calcium hydroxide

XIONG Shuang1(), YAN Jinsheng2, ZHOU Zhou2, ZHOU Baodi3, CHEN Xiaopeng1, TONG Zhangfa1()   

  1. 1. College of Chemistry and Chemical Engineering of Guangxi University, Nanning 530004, China
    2. Guangxi Calcium based Materials Collaborative Innovation Center of Chongzuo South Cement Co., Ltd., Nanning 530004, China
    3. Guilin Mining Machinery Co., Ltd., Guilin 541213, China
  • Received:2023-02-06 Published:2023-12-10 Online:2023-12-14

摘要:

以工业级生石灰为原料,考察了消化水初始温度、搅拌转速、水灰质量比和加压消化方式对反应产物氢氧化钙的形貌结构、粒径和比表面积的影响;采用马尔文激光粒度分布仪、扫描电镜(SEM)和比表面积分析仪对产物氢氧化钙进行分析表征。结果表明:消化速率随着消化水初始温度的升高而加快,当搅拌转速为500 r/min、水初始温度为45~80 ℃、水灰质量比为4∶1时,所制得的氢氧化钙粒径分布最窄,最大比表面积为18.23 m2/g;当消化水初始温度为25~45 ℃时,产物氢氧化钙形貌呈现“树枝状”,当消化水初始温度为65~80 ℃时,产物氢氧化钙形貌为“颗粒状”;加压消化方式能获得较大比表面积的氢氧化钙且其形貌为“花瓣状”,最大比表面积为29.32 m2/g。

关键词: 生石灰, 氢氧化钙, 消化反应, 比表面积, 形貌

Abstract:

The effects of initial digestion water temperature,stirring speed,water-ash mass ratio and pressurized digestion on the morphological structure,particle size and specific surface area of the reaction product calcium hydroxide were investigated by using industrial grade quicklime as raw materials,and the product calcium hydroxide was characterized by Malvern laser particle size distribution instrument,scanning electron microscope(SEM) and specific surface area analyzer.The results showed that the digestion rate was accelerated with the increase of the initial temperature of water,and when the stirring speed was 500 r/min,the initial temperature of water was 45~80 ℃,and the mass ratio of water to ash was 4∶1,the produced calcium hydroxide had the narrowest particle size distribution and the maximum specific surface area was 18.23 m2/g.When the initial temperature of digested water was 25~45 ℃,the morphology of the product calcium hydroxide showed a "dendritic" shape,and when the initial temperature of the digestion water was 65~80 ℃,the shape of product calcium hydroxide grew into “granular”.The pressurized digestion method could obtain a large specific surface area of calcium hydroxide and its shape was “petal-like”,and the maximum specific surface area was 29.32 m2/g.

Key words: quicklime, calcium hydroxide, digestion process, specific surface area, morphology

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