化工矿物与加工2025，Vol.54Issue(3)：48-56,9.DOI:10.16283/j.cnki.hgkwyjg.2025.03.006
基于一步相转移-碳化法的电石渣制备纳米碳酸钙工艺研究
Research on the process of preparing nano calcium carbonate from calcium carbide slag based on one-step phase transfer carbonization method
摘要
Abstract
Calcium carbide slag is a by-product generated during the production of acetylene by calcium carbide method,belonging to grade Ⅱ industrial solid waste.Its main component is Ca(OH)2.The high-value,large-scale,and intensive utilization of calcium carbide slag is of great significance for resource conservation and environmental pro-tection.This article adopts a one-step phase transfer carbonization method to prepare nano calcium carbonate from industrial carbide slag.The Ca2+phase transfer rate is used as the evaluation index,and single factor condition experi-ments and orthogonal experiments are carried out.X-ray diffraction(XRD),field emission scanning electron micros-copy(FE-SEM),field emission transmission electron microscopy(FE-TEM)and other methods are used to characte-rize and analyze the morphology and structure of the samples.The results show that the suitable phase transfer reac-tion conditions are a phase transfer agent molar ratio of 4:3,a reaction temperature of 3℃,a reaction time of 20 min,and a stirring rate of 200 r/min.Under these conditions,the Ca2+phase transfer rate reach 91.97％;After screening,DG2 is determined to be a suitable crystal form control agent.The suitable carbonization process conditions are carbonization temperature of 10℃,CO2 flow rate of 0.3 L/min,and crystal form control agent addition of 3％.The sample prepared under these conditions is pure phase calcite crystal nano calcium carbonate with a particle size of 30 nm and uniform particle size distribution;The steric hindrance formed by the complexation of Y3-in the phase transfer agent and its adsorption on the surface of CaCO3 crystals can affect the growth of CaCO3 particles;The crystal form control agent DG2 can chelate with Ca2+to form stable cyclic complexes under the influence of high concentration Y3-,and jointly promote the formation of nano CaCO3 through adsorption on the surface of calcium carbonate crys-tals.The research results can provide new ideas for the comprehensive utilization of industrial carbide slag.关键词
电石渣/相转移剂/晶型控制剂/碳化法/纳米碳酸钙/正交试验/条件试验/络合反应Key words
carbide slag/phase transfer agent/crystal control agent/carbonization method/nano-CaCO3/orthogo-nal test/conditional test/complexation reaction分类
化学工程引用本文复制引用
蒋国华,王百年,汪晨,杨保俊..基于一步相转移-碳化法的电石渣制备纳米碳酸钙工艺研究[J].化工矿物与加工,2025,54(3):48-56,9.基金项目
2022年度安徽省科技重大专项(112175456041). （112175456041）
