力-热场耦合无氟碱酸法石墨提纯试验研究  

Experimental Study on Graphite Purification by Force-Thermal Field Coupling Fluorine Free Alkali Acid Method

作　　者：黄建树 刘定桦 贺洋[1,2] 程飞飞 刘克起 于阳辉 Huang Jianshu;Liu Dinghua;He Yang;Cheng Feifei;Liu Keqi;Yu Yanghui(Suzhou Sinoma Design and Research Institute of Non-metallic Minerals Industry Co.,Ltd.,Suzhou,Jiangsu 215151;National Engineering Research Center for Further Processing of Non-metallic Minerals,Suzhou,Jiangsu 215151)

机构地区：[1]苏州中材非金属矿工业设计研究院有限公司,江苏苏州215151 [2]国家非金属矿深加工工程技术研究中心,江苏苏州215151

出　　处：《非金属矿》2024年第5期60-64,共5页Non-Metallic Mines

基　　金：晶质石墨提纯与精深加工技术及大规模示范(2021YFC2902902)。

摘　　要：为了提升碱酸法制备高纯石墨品位,降低环境污染,本试验以萝北石墨浮选精矿为原料,研究了力-热场耦合无氟碱酸法对石墨的提纯效果。结果表明,在NaOH用量为250 kg/t,碱熔温度为750℃,碱融时间为60 min,HCl用量为300 kg/t,酸浸温度为85℃,酸浸时间为4 h的条件下,进行两段超声:第1段为360 W超声强度,80℃温度下洗涤30 min(碱熔后);第2段为180 W超声强度,70℃温度下洗涤20 min(酸浸后),最终制备出的高纯石墨固定碳含量高达99.973%,Si含量为101μg/g,Al含量为31μg/g,Fe含量为29μg/g。In order to improve the grade of high-purity graphite prepared by alkaline acid method and reduce environmental pollution,this study used Luobei graphite flotation concentrate as raw material to study the purification effect of force-thermal field coupling fluorine-free alkaline acid on graphite.The results showed that under the conditions of NaOH dosage of 250 kg/t,alkali melting temperature of 750℃,alkali melting time of 60 min,HCl dosage of 300 kg/t,acid leaching temperature of 85℃,and acid leaching time of 4 h,two ultrasonic stages were carried out:the first stage was 360 W ultrasonic intensity,washed at 80℃for 30 min(after alkali melting),and the second stage was 180 W ultrasonic intensity,washed at 70℃for 20 min(after acid leaching),the final high-purity graphite was obtained with a fixed carbon content of 99.973%,Si content of 101μg/g,Al content of 31μg/g,and Fe content of 29μg/g.

关 键 词：高纯石墨 碱酸法 石墨提纯 多场耦合 

分 类 号：TD925[矿业工程—选矿]