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微晶石墨高温焙烧制备高纯石墨研究
Authors
冯雅丽
李浩然
+4 more
苏军伟
陈浩
陈熹沛
马英
Publication date
1 January 2017
Publisher
Abstract
以青海都兰某微晶石墨浮选精矿为原料,通过高温焙烧制备高纯石墨。利用XRF、XRD、SEM-EDS等分析原料成分、物相、形貌,系统考查焙烧温度与时间对石墨含碳量和回收率的影响。以含碳量为目标优化了焙烧时间、NaOH/石墨配料比、盐酸浓度、酸浸温度、酸浸时间等参数。结果表明,焙烧温度1 000℃,焙烧时间为20 min,NaOH与石墨矿的质量比为0.75,盐酸浓度为0.6 mol/L,酸浸温度为40℃,酸浸时间为60 min条件下,固定碳含量提高到99.898%,回收率为64.32%。高温碱熔酸浸法是用微晶石墨制备高纯石墨的有效方法,为微晶石墨的高效利用开辟新途径。</p
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Last time updated on 08/09/2018