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 (7): 58-64.doi: 10.19964/j.issn.1006-4990.2022-0588

• 研究与开发 • 上一篇    下一篇

白云石二次碳化法制备大立方体碳酸钙的研究

曲笑原1,2,3(), 郑强1,2,3, 凡远洋1,2,3, 刘海利1,2,3, 邓晓阳1,2,3, 李雪1,2,3()   

  1. 1.沈阳化工大学化学工程学院,辽宁 沈阳 110142
    2.辽宁省镁钙无机功能材料工程研究中心,辽宁 沈阳 110142
    3.辽宁省化工应用技术重点实验室,辽宁 沈阳 110142
  • 收稿日期:2022-10-03 出版日期:2023-07-10 发布日期:2023-07-13
  • 通讯作者: 李雪,博士,教授;E-mail:ltmlx@163.com
  • 作者简介:曲笑原(1998— ),女,硕士研究生;E-mail:895987526@qq.com
  • 基金资助:
    辽宁省教育厅自然科学青年项目(LQ2020003);2020—2022年辽宁省普通本科高等学校校际合作项目(辽教发[2020]28号文件);2021—2023年辽宁省科技厅创新能力提升联合基金项目(2021-NLTS-12-04)

Study on preparation of large cube calcium carbonate by secondary carbonization of dolomite

QU Xiaoyuan1,2,3(), ZHENG Qiang1,2,3, FAN Yuanyang1,2,3, LIU Haili1,2,3, DENG Xiaoyang1,2,3, LI Xue1,2,3()   

  1. 1. Faculty of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China
    2. Liaoning Magnesium-Calcium Inorganic Functional Materials Engineering Research Center,Shenyang 110142,China
    3. Liaoning Provincial Key Laboratory of Chemical Application Technology,Shenyang 110142,China
  • Received:2022-10-03 Published:2023-07-10 Online:2023-07-13

摘要:

以河北省某矿山的白云石粉、二氧化碳、氯化铵为原料,采用二次碳化法制备大立方体碳酸钙,主要考察碳化温度、通碳速率、通碳量、陈化温度、陈化时间对方解石碳酸钙形貌的影响,并探究了碳酸钙的成型及生长过程和规律。结果表明:在40 ℃时通碳、通碳速率为50 mL/min、通碳200 s停止第一次通碳,升温陈化90 min后继续第二次通碳并陈化40 min后,可以制备得到大立方体方解石碳酸钙,纯度可达98%以上,白度可达95%~99%,其形貌规整,粒径较大,为15~20 μm。此研究为储量丰富的碳酸盐矿物生产高附加值产品提供了新思路。

关键词: 大立方体碳酸钙, 白云石, 二次碳化, 气液接触法

Abstract:

Large cube calcium carbonate was prepared from dolomite in Hebei province,ammonium chloride and CO2 by secondary carbonization.The effects of carbonization temperature,the rate of CO2,the amount of CO2,aging temperature and aging time on the morphology of calcite calcium carbonate were researched,and the molding and growth process and law of calcium carbonate were explored.The results showed that under the conditions of carbon passage and carbon passage rate of 50 mL/min at 40 ℃,the first carbon passage was stopped at 200 s,the temperature aging was 90 min,and the second carbon passage and aging were continued for 40 min,the large cube calcite calcium carbonate could be prepared,the purity could reach more than 98%,the whiteness could reach 95%~99%,its morphology was regular,the particle size was larger,and the particle size was 15~20 μm.This research provided new ideas and new paths for the production of high-additive products from abundant carbonate minerals.

Key words: large cube calcium carbonate, dolomite, secondary carbonization, gas-liquid contact method

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