化工矿物与加工2025，Vol.54Issue(2)：9-16,8.DOI:10.16283/j.cnki.hgkwyjg.2025.02.002
电石渣矿化CO2联产碳酸钙晶须试验研究
Experimental study on calcium carbonate whisker from carbide slag through CO2 mineralization
摘要
Abstract
Carbide slag is a kind of solid waste with high calcium content produced in the production process of poly-vinyl chloride(PVC).It is an excellent secondary calcium resource.The synthesis of high value-added calcium carbon-ate by carbonization method can not only realize the resource utilization of carbide slag,but also reduce the emission of CO2.This paper proposes a technology to mineralize CO2 and produce calcium carbonate whiskers with carbide slag as raw material.The effects of CO2 flow rate,reaction temperature and reaction time on the crystal form and morpholo-gy of carbonation products were investigated.The results show that the optimized process conditions for mineralizing CO2 in leachate were CO2 flow rate of 100 mL/min,reaction temperature of 80℃,and reaction time of 90 min;By adjusting the process conditions,the crystal form and morphology of the carbonated product are controlled.The crystal form of the product obtained under the optimized conditions is a single fibrous aragonite;The increase of CO2 flow rate,reaction temperature,and reaction time in carbonation reaction is beneficial for the transformation of car-bonation products into more thermodynamically stable crystal forms;In addition,the filtrate from the carbonation reaction can be recycled for the leaching of Ca(OH)2.关键词
电石渣/碳酸钙晶须/CO2矿化/碳酸化/滤液/文石/晶型Key words
carbide slag/calcium carbonate whisker/CO2 mineralization/carbonation/filtrate/aragonite/crystal form分类
化学工程引用本文复制引用
姚金,丁文金,陈秋菊..电石渣矿化CO2联产碳酸钙晶须试验研究[J].化工矿物与加工,2025,54(2):9-16,8.基金项目
四川省自然科学基金面上项目(2023NSFSC0348) （2023NSFSC0348）
四川省科技创新创业苗子工程重点项目(2023JDRC0070). （2023JDRC0070）
