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人工晶体学报 ›› 2023, Vol. 52 ›› Issue (4): 710-720.

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电石渣可控制备多晶型、多形貌纳米碳酸钙的研究进展

丁羽, 张金才, 王宝凤, 郭彦霞, 薛芳斌, 程芳琴   

  1. 山西大学资源与环境工程研究所,国家环境保护废弃资源高效利用重点实验室,太原 030006
  • 收稿日期:2022-12-07 出版日期:2023-04-15 发布日期:2023-04-28
  • 通信作者: 张金才,副教授。E-mail:chaner9944@126.com
  • 作者简介:丁 羽(1998—),女,山东省人,硕士研究生。E-mail:2553646458@qq.com
  • 基金资助:
    2022年度国家重点研发计划项目(2022YFB4102100)

Progress on Controllable Preparation of Polycrystalline and Polymorphic Nano Calcium Carbonate by Calcium Carbide Slag

DING Yu, ZHANG Jincai, WANG Baofeng, GUO Yanxia, XUE Fangbin, CHENG Fangqin   

  1. State Environmental Protection Key Laboratory of Efficient Utilization of Waste Resources, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China
  • Received:2022-12-07 Online:2023-04-15 Published:2023-04-28

摘要: 碳酸钙有不同的晶体特征,使其在各个领域发挥不同的作用,对碳酸钙晶型、形貌和尺寸的控制是无机材料制备的研究热点。以电石渣为原料制备纳米碳酸钙能够实现变废为宝,是含钙固废综合利用的研究方向之一。因此在电石渣制备纳米碳酸钙过程中同步实现晶型、形貌的调控,能够将低附加值的电石渣固废转化为高附加值的纳米碳酸钙产品,具有良好的环境效应和经济效益。本文总结了电石渣制备纳米碳酸钙的方法,重点讨论了制备过程中晶型和形貌控制方面的研究进展。结果表明,在碳酸钙晶体成核和生长的过程中,控制工艺条件可以通过影响过饱和度进一步实现对晶型和形貌的调控,且不同种类的添加剂作用机理也不尽相同。热力学、动力学作为控制结晶各过程平衡的基础,可以用来解释各影响因素的作用机理。

关键词: 纳米碳酸钙, 电石渣, 晶型, 形貌, 可控制备, 热力学, 动力学

Abstract: Calcium carbonate has different crystal characteristics, which makes it play different roles in various application fields. The control of calcium carbonate crystal structure, morphology and size is a hot research topic in the preparation of inorganic materials. The preparation of nano calcium carbonate produced from calcium carbide slag can realize the transformation of waste into resource, which is one of the important research fields concerning the recycling of calcium-containing solid wastes. The controllable preparation of calcium carbonate with different crystalline structure and morphology from calcium carbide slag can make the worthless calcium carbide slag transform into high value-added nano grade products with good environmental and economic effects. The preparation methods of nano calcium carbonate from calcium carbide slag are summarized in this paper, the research progress of the control of crystal structure and morphology during the preparation process is discussed emphatically. The results indicate that, during the nucleation and growth of calcium carbonate crystals, controlling the process conditions can further achieve the regulation of crystal structure and morphology by influencing the degree of supersaturation, and the action mechanism varies from different kinds of additives. As the basis for controlling the equilibrium of the crystallization processes, thermodynamics and kinetics can be used to explain the mechanism of action of each influencing factor.

Key words: nano calcium carbonate, calcium carbide slag, crystal structure, morphology, controllable preparation, thermodynamics, kinetics

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