Inorganic Chemicals Industry >

2023 , Vol. 55 >Issue 12: 50 - 58

DOI: https://doi.org/10.19964/j.issn.1006-4990.2023-0051

Research & Development

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

  • XIONG Shuang ,
  • YAN Jinsheng ,
  • ZHOU Zhou ,
  • ZHOU Baodi ,
  • CHEN Xiaopeng ,
  • TONG Zhangfa
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  • 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 date: 2023-02-06

  Online published: 2023-12-14

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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

Cite this article

XIONG Shuang , YAN Jinsheng , ZHOU Zhou , ZHOU Baodi , CHEN Xiaopeng , TONG Zhangfa . Effect of reaction conditions of quicklime digestion on properties of calcium hydroxide[J]. Inorganic Chemicals Industry, 2023 , 55(12) : 50 -58 . DOI: 10.19964/j.issn.1006-4990.2023-0051

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