The invention relates to a process for purifying graphite fine. The project is the first ore graphite with sodium chloride, sodium carbonate according to the mass ratio of 80~90:5~10:5~10 mixed evenly, and then in accordance with the heating rate of 10~15 DEG /min temperature, calcination temperature at 680~800 Deg. C under the condition of 60~120min by the end of the roasting roasting roasting, cooked and exhaust gas through the spray pipe through the water spray spray liquid for subsequent leaching operation by will be cooked like acid, roasting washing operation, washing after washing and washing liquid are obtained by the solid-liquid separation material, water extract by adding hydrochloric acid and mixed acid leaching liquid spray for subsequent operations; the washed material by acid leaching operation, the concentration of hydrochloric acid was 1~5mol/L, the ratio of liquid to solid 5~10mL:1 g, leaching temperature is 50~90 DEG C and the stirring intensity is 150~300r/min under the condition of stirring 240~300min, stirring after solid-liquid separation to obtain high purity graphite. The invention has the advantages of simple operation process, low energy consumption, low consumption of medicament and low calcination temperature, and the wastewater and exhaust gas generated by the process can be recycled and the purity of graphite product is high.
【技术实现步骤摘要】
一种石墨精提纯工艺
本专利技术属石墨综合利用
,具体涉及一种石墨精提纯工艺。
技术介绍
石墨是一种资源性矿物,其产品常被加工成导电、密封、耐火、耐高温、散热、防辐射和隔热等性能材料,广泛应用于冶金、化工和机械设备等领域。近年来,随着新能源、新材料产业的崛起,石墨深加工领域得到长足发展。然而石墨深加工对石墨纯度的要求苛刻,石墨的纯度越高,其利用价值和商业价值也越大,因此石墨的精提纯是非常有意义的。目前,石墨精提纯工艺主要包括以下七种方法,石墨焙烧-碱浸-酸浸法,浮选法,加碱焙烧-水洗-酸浸法,氢氟酸浸出法,氯化焙烧法和高温焙烧法(唐维,匡加才,谢炜,等.隐晶质石墨纯化研究进展[J].化学工程师,2012,(4):30-33;吕一波,季长顺,李青侠,等.浮选柱精选细鳞片中碳石墨实验[J].黑龙江科技学院学报,2013,(1):26-29;刘进卫,卢都友,严生,等.热活化对氢氟酸法制备高纯石墨的影响[J].炭素技术,2013,(4):35-39;梁刚,赵国刚,王振廷.感应加热制取高纯石墨研究[J].炭素技术,2013,(4):32-34;王星,胡立嵩,夏林,等.石 ...
【技术保护点】
一种石墨精提纯工艺,其特征在于:所述方法包括下述步骤:a、将石墨矿与氯化钠、碳酸钠按照质量比80~90:5~10:5~10混合均匀,然后置于焙烧炉中,按照升温速率为10~15℃/min的条件下升至焙烧温度,在焙烧温度为680~800℃条件下焙烧60~120min,焙烧结束得到焙烧熟样和废气,废气通过喷淋管道经清水喷淋得到喷淋液用于后续酸浸作业;b、将焙烧熟样进行水洗作业,在液固比为5~10 mL:1 g,浸出温度为40~70℃和搅拌强度为100~300r/min条件下搅拌60~90min,搅拌结束后经固液分离得到水洗液和水洗料,水浸液经补加盐酸后与喷淋液混合用于后续酸浸作业 ...
【技术特征摘要】
1.一种石墨精提纯工艺,其特征在于:所述方法包括下述步骤:a、将石墨矿与氯化钠、碳酸钠按照质量比80~90:5~10:5~10混合均匀,然后置于焙烧炉中,按照升温速率为10~15℃/min的条件下升至焙烧温度,在焙烧温度为680~800℃条件下焙烧60~120min,焙烧结束得到焙烧熟样和废气,废气通过喷淋管道经清水喷淋得到喷淋液用于后续酸浸作业;b、将焙烧熟样进行水洗作业,在液固比为5~10mL:1g,浸出温度为40~70℃和搅拌强度为100~300r/min条件下搅拌60~90min,搅拌结束后经固液分离得到水洗液和水洗...
【专利技术属性】
技术研发人员:李望,赵恒,朱晓波,任博,侯磊,
申请(专利权)人:河南理工大学,
类型:发明
国别省市:河南,41
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