青龙铁矿伴生石墨矿选矿工艺研究

发布时间：2018-04-13 00:39

本文选题：石墨 + 磨矿　；参考：《华北理工大学》2017年硕士论文

【摘要】：选用河北青龙某铁矿伴生石墨矿石,对其进行了选矿试验研究,为选择与确定最佳的矿石处理方案提供有力的依据。实验选取代表性石墨矿样进行工艺矿物学研究,研究结果表明河北青龙某铁矿伴生石墨矿石有价元素是碳和铁,均达到工业回收含量的要求,具有开采分选的价值,且矿石中有害杂质P、S含量较低,故实验不考虑其对精矿产物的质量影响。对河北青龙某铁矿伴生石墨矿石进行了磨矿细度及磨矿段数、每段磨矿药剂条件及精选次数的试验研究,最终确定工艺流程为:一段磨矿细度为-200目占31.71%,粗选捕收剂用量为100g/t、起泡剂用量为25g/t;二段磨矿磨矿细度为-200目占80.14%,粗选捕收剂用量为80g/t、起泡剂用量为20g/t;二段精矿三段磨矿细度为-200目占81.28%,粗选捕收剂用量为40g/t、起泡剂用量为10g/t;三段精矿四段磨矿细度为-200目占82.86%,粗选捕收剂用量为20g/t、起泡剂用量为5g/t;试验确定四段磨矿多次精选的流程。通过四段磨矿、一次粗选,十次精选,中矿返回到品位相近的作业的闭路试验流程,最终得到石墨精矿品位96.55%,产率4.50%,回收率69.04%的浮选指标。分选指标达到石墨精矿标准。实验通过磨矿粒度、浮选浓度、药剂制度及工艺流程的研究,确定适合该类矿石的选矿工艺,为我国河北省铁矿伴生的细鳞片石墨矿石的开发利用提供科学依据。
[Abstract]:In this paper, a certain iron ore associated with graphite ore of Azure Dragon in Hebei Province is selected and studied through ore dressing test, which provides a strong basis for selecting and determining the best ore treatment scheme.The experimental results show that the valuable elements of graphite ore associated with a certain iron ore of Azure Dragon in Hebei Province are carbon and iron, both of which meet the requirements of industrial recovery and have the value of mining and sorting.The content of harmful impurity PnS in the ore is low, so the effect of the impurity on the quality of the concentrate is not considered in the experiment.The grinding fineness, the number of grinding sections, the grinding reagent conditions and the cleaning times of graphite ore associated with a certain iron ore of Azure Dragon in Hebei Province were studied.The fineness of three-stage grinding is -200 mesh 81.28 mesh, the amount of coarse collector is 40 g / t, the amount of foaming agent is 10 g / t, the fineness of three-stage concentrate is -200 mesh and 82.86 mesh, the amount of coarse selected collector is 20 g / t, and the amount of foaming agent is 5 g / t.Through the closed-circuit test process of four stage grinding, one rough dressing, ten times cleaning, the middle ore returns to the similar grade operation, the flotation index of graphite concentrate grade 96.55, yield 4.50% and recovery rate 69.04% is obtained.The separation index reaches the standard of graphite concentrate.Through the study of grinding particle size, flotation concentration, reagent system and technological process, the processing technology suitable for this kind of ore is determined, which provides a scientific basis for the development and utilization of the fine flake graphite ore associated with iron ore in Hebei Province.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD92

【参考文献】