吉林地区隐晶质石墨矿浮选提纯试验研究

Float purification experimental study of a refractory cryptocrystalline graphite ore in Jilin Province

吉林汪清地区某石墨矿属于隐晶质难选石墨矿石。采用1次粗磨1次粗选、粗精矿5次再磨6次精选,中矿1、2、3和4合并后再磨再选,扫选精矿(即中矿8)和中矿5、6、7集中再磨再选工艺流程,可获得最终精矿1固定碳含量为86.69%,回收率为47.28%;精矿2固定碳含量为73.54%,回收率为37.91%。精矿1与2合并之后固定碳含量为80.30%,满足中碳级别指标,回收率为85.20%,满足隐晶质石墨准入条件要求;中矿9固定碳含量为54.11%,回收率为7.84%,达到了LD(-)50-60的低碳石墨技术指标,可以作为铸造涂料的原料使用。

The graphite ore from Wangqing area in Jilin belongs to the refractory cryptocrystalline graphite ore. The following process was adopted which includes one time coarse and one time roughing, the rough concentrate five grindings and six cleanings, the middle（ 1 ~ 4） merged, regrinding and scavenging once, the concentrate of the scavenging（namely the middle 8） and the middle（5~ 7） got together regrinding one time and scavenging two times. The fixed carbon content of the final concentrate 1 and 2 were86.69% and 73.54%, respectively, and the recovery rate were 47.28% and 37.91%, respectively. The fixed carbon content of the merged final concentrates was 80.30%, which satisfies the indicator level of middle carbon, and the recovery rate was 85.20%, which meets the access requirements of cryptocrystalline graphite ore. The fixed carbon content and the recovery rate of the middle 9 were54.11% and 7.84%, respectively, which achieves the technical indicators of LD（-） 50-60 low carbon, and can be used as the raw material of cast steel coating.