废阴极炭块中氟化物的回收利用  

Recycling utilization of fluoride in spent cathode carbon blocks

作　　者：张宏忠[1,2,3] 王利[1,2,3] 刘晴[1] 胡慧丽 常醒 陈文亮[1] Zhang Hongzhong Wang Li Liu Qing Hu Huili Chang Xing Chen Wenliang(School of Material and Chemical Engineering,Zhengzhou University of Light Industry ,Zhengzhou 450001, China Zhengzhou Hongyue Environment Science Technology Ltd. Key Laboratory of Pollution Treatment and Resource, China National Light Industry Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration)

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450001 [2]中国轻工业污染治理与资源化重点实验室 [3]环境污染治理与生态修复河南省协同创新中心 [4]郑州鸿跃环保科技有限公司

出　　处：《无机盐工业》2017年第5期56-60,共5页Inorganic Chemicals Industry

基　　金：郑州轻工业学院研究生科技创新基金项目(2015年度);郑州轻工业学院大学生科技活动重点项目(2016年度);国家级大学生创新创业训练计划项目(2016);环境污染治理与生存修复河南省协同创新中心2016年度开放基金项目(XTCX-013)

摘　　要：以废阴极炭块为原料,通过成分分析,研究了不同液固比以及浸出时间对氟化物浸出效果的影响,并选取氯化钙作为氟化物回收药剂,研究了不同pH、药剂用量、反应时间、反应温度对回收效果的影响,还探讨了不同浸出次数对氟化钙产量以及浸出残渣的成分影响。结果显示,在液固比为8∶1、浸出时间为15 min的浸出条件下,采用浸出液初始pH,添加理论需要的CaCl_2·6H_2O用量,反应时间为45 min,反应温度为100℃可以达到氟化钙的最佳回收效果,且最多进行2次浸出回收,残渣中石墨的纯度随着浸出次数的增加逐渐增大。Using spent cathode carbon blocks as raw materials,the influences of different liquid-solid ratios and leaching times on the fluoride concentration in leaching solution were investigated by component analysis.In addition ,the effects of different pH, reagent dosages, reaction times, and temperatures on the recovery efficiency of fluoride were researched by using calcium chloride as the recovery agent of fluoride, and the effects of leaching frequency on the yield of calcium fluoride and components of leaching residues were also discussed.Results showed that the best recycling efficiency of calcium fluoride with two times of leaching recycling and the purity of graphite in the residues raised with the increasing of leaching frequency were obtained under the leaching recipe with the liquid-solid ratio of 8：1 ,leaching time of 15 rain,initial pH,theoretical amount of CaCl2·6H2O, reaction time of 45 min, and temperature at 100 ℃.

关 键 词：废阴极炭块 氟化物 石墨 

分 类 号：TQ124.3[化学工程—无机化工]