摘要
针对河南某低品位难选石墨矿矿石特点,通过工艺矿物学研究,查明了影响石墨选矿的主要因素为原矿品位低,嵌布粒度微细,层状易浮脉石云母质量分数高,含可浮性好的黄铁矿。以此为基础开展了选矿试验研究,进行了大量的条件对比试验,通过药剂制度优化。结果表明,捕收剂复合柴油(柴油和十二烷基二甲基甜菜碱以4∶1混合)和杂醇类起泡剂MA的药剂组合可有效提高精矿品位和回收率、降低药剂用量,抑制剂石灰可实现石墨与黄铁矿的分离。闭路试验可以获得精矿石墨质量分数达到90.82%,回收率率为91.18%,有效提高矿石的综合利用价值。
The low grade refractory graphite ore has been selected to carry out a study of process mineralogy in this paper. It is found out that main factors affecting the beneficiation indexes include the low grade of raw ore,the micron size of the disseminated grains,high content of lamelleted mica which is easily to be floated,and the existence of pyrite which has good floatability. On this basis of the above study,the benefication tests including a great amount of conditional comparative tests and the reagent system optimization have been conducted. The results show that a combination of the mixed collecting agent of diesel oil and dodecyl dimethyl betaine( the dosage ratio is 4 ∶1) and the foaming agent of fusel alcohols( which was called MA in the text) has effectively improved the grade and recovery of the concentrate and reduced dosages of reagents. Pyrite can be efficiently separated from graphite by using lime as an inhibitor. The concentrate,obtained through the closed-circuit test,contains 90. 82% of carbon with the recovery rate of 91. 18%. This test has effectively improved the comprehensive utilization value of the ore.
出处
《矿物学报》
CAS
CSCD
北大核心
2018年第3期336-342,共7页
Acta Mineralogica Sinica
基金
湖南省重点研发计划项目(编号:2016GK2028)
长沙市科技计划项目(编号:kc1701043)
关键词
石墨
复合柴油
MA
浮选
graphite
mixed diesel-oil
MA
flotation
