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 ›› 2025, Vol. 57 ›› Issue (11): 100-107.doi: 10.19964/j.issn.1006-4990.2024-0449

• 环境·健康·安全 • 上一篇    下一篇

电石渣矿化CO2制备球霰石型碳酸钙及其晶型控制研究

常进刚1(), 葛岩2, 寇俊杰1, 王嘉勉2, 杨志勇1, 蔡力宏2,3()   

  1. 1.国电电力大同发电有限责任公司,山西 大同 037001
    2.原初科技(北京)有限公司,北京 100020
    3.清华大学,北京 100084
  • 收稿日期:2024-08-14 出版日期:2025-11-10 发布日期:2025-07-25
  • 通讯作者: 蔡力宏(1969— ),男,博士研究生,主要从事二氧化碳矿化技术及工业应用;E-mail:caili-hong2005@sina.com
  • 作者简介:常进刚(1982— ),男,硕士,主要从事自动化方面研究;E-mail:12068421@ceic.com

Study on crystal structure control of aragonite prepared by CO2 mineralization from carbide slag

CHANG Jingang1(), GE Yan2, KOU Junjie1, WANG Jiamian2, YANG Zhiyong1, CAI Lihong2,3()   

  1. 1. GD Power Datong Power Generation Co. ,Ltd. ,Datong 037001,China
    2. Yuanchu Technology(Beijing)Co. ,Ltd. ,Beijing 100020,China
    3. Tsinghua University,Beijing 100084,China
  • Received:2024-08-14 Published:2025-11-10 Online:2025-07-25

摘要:

研究以电石渣为原料,在电石渣-NH4Cl-CO2常压体系中添加5种不同晶型控制剂制备球霰石型碳酸钙。采用场发射扫描电子显微镜和X射线衍射仪等仪器,系统研究晶型控制剂对碳酸钙产品的粒径、白度、晶型和形貌的影响;考察Ca2+浓度和六偏磷酸钠[(NaPO36)]添加量等因素对矿化效果及矿化液稳定性的影响。结果表明:当Ca2+浓度为1.05 mol/L时,能得到均匀分散的球霰石型碳酸钙;低于此浓度时,球霰石型碳酸钙产量随着Ca2+浓度增加而增加;高于此浓度时,随着Ca2+浓度的增加,球霰石型碳酸钙团聚严重,最终转变为方解石型碳酸钙。此外,(NaPO36的加入量对碳酸钙产品的理化性质影响显著,在(NaPO36加入量为每100 g干基理论碳酸钙产量添加1 g(NaPO36且Ca2+浓度为1.05 mol/L的条件下,球霰石型碳酸钙向方解石型碳酸钙的转变趋势被有效遏制,制备产品晶型能长期维持为球霰石型。以(NaPO36为晶型控制剂构建的稳定球霰石型碳酸钙合成体系,为电石渣高附加值利用与CO2封存开辟新途径。

关键词: 电石渣, 矿化, 球霰石, 晶型, 六偏磷酸钠

Abstract:

Carbide slag was usesd as raw material and five different crystal type control agents were added to the carbide slag-NH4Cl-CO2 atmospheric pressure system to finally prepare aragonite calcium carbonate.The effects of control agents on the particle size,whiteness,crystal structure,and morphology of calcium carbonate were systematically studied using instruments such as field emission scanning electron microscopy and X-ray diffraction.And the effects of factors such as Ca2+concentration and the amount of sodium hexametaphosphate(NaPO36 added on the mineralization effect and the stability of the mineralization solution were investigated.The data showed that when the Ca2+concentration was 1.05 mol/L,uniformly dispersed vaterite could be obtained.When it was lower than this concentration,the amount of vaterite was increased with the increase of Ca2+concentration.When the concentration was higher than this,with the increase of Ca2+concentration,vaterite was aggregated severely and eventually transformed into calcite.In addition,(NaPO36 had a significant impact on the physicochemical properties of calcium carbonate products.Under the conditions of 1 g (NaPO36/100g CaCO3 and a Ca2+concentration of 1.05 mol/L,the transformation of aragonite phase calcium carbonate to calcite phase calcium carbonate could be effectively suppressed,and the prepared product could maintain its crystal form as aragonite for a long time.The stable synthesis system of aragonite using(NaPO36 as the crystal type control agent opened up new avenues for high value-added utilization of carbide slag and CO2 storage.

Key words: carbide slag, mineralization, vaterite, crystal form, (NaPO36

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