连续式高温反应石墨提纯装备与工艺  

A continuous high-temperature purification reactor for graphite using Freon-12

作　　者：胡祥龙[1,2] 汤贤 周岳兵 戴煜 黄启忠[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]湖南顶立科技有限公司,湖南长沙410118

出　　处：《新型炭材料》2016年第5期532-538,共7页New Carbon Materials

基　　金：国家973计划(2011CB605801)~~

摘　　要：一种新型连续式高温石墨提纯热工装备,通过高温传动装置驱动石墨粉在提纯过程中运动,实现工业化连续提纯。该设备的自动进出料技术保证石墨在提纯过程中不断供给与收集,且反应气体不泄露;炉膛采用多区控温,温度分布均匀性控制为±5℃;保温材料采用迷宫式错层搭接结构,防止热散失;尾气处理系统采用四级收集装置,对尾气、焦油、粉尘等进行分开收集处理。将该石墨提纯炉应用于高温反应法石墨提纯,石墨的纯度从初始的88.2%提高至99.5%,提纯速率为90 kg/h,达到了连续量产高纯石墨的要求,对开发下一代工业化石墨提纯装备和技术具有重要的实际意义。A new continuous high-temperature reactor for graphite purification using Freon -12 up to 2 600 ℃ was designed with a collection and disposal device for the exhaust such as off-gases,tar and dust.The reactor had an automatic graphite delivery system and amulti-zone temperature control system for feed-in,heating,reaction,cooling and feed-out regions that were controlled within ±5 ℃.The configuration of heat-insulating materials use da labyrinthine connection for irregularly-positioned multi-layer insulating pieces to isolate air and to prevent heat dissipation.Using this reactor the purity of the graphite can be increased from 88.2 to 99.5% with a production capacity of 90 kg/h.

关 键 词：石墨纯度 热处理炉 进出料 温度控制 密封性 尾气处理 

分 类 号：TQ127.11[化学工程—无机化工]