选择性磨矿对含钒石煤单体解离的影响研究

发布时间：2018-12-29 08:17

【摘要】：为研究磨矿介质对石煤选择性磨矿的影响,分别考察了钢棒和钢球两种磨矿介质对湖北通山焙烧脱碳石煤在三辊四筒磨机中的选择性磨矿效果并确定合适的磨矿介质,然后通过浮选试验和云母解离度分析确定合适的磨矿细度。结果表明,由于含钒云母及各种脉石矿物的可磨性存在较大的差异,球磨与棒磨均有选择性磨矿的效果,即细粒级(-38μm)和粗粒级(+104μm)V2O5品位较高,中间粒级(-104+38μm)V2O5品位较低,但棒磨产品粒度更均匀,粒级间V2O5的品位极差更大,棒磨的选择性磨矿效果优于球磨。浮选试验和云母的解离度分析均表明,最佳的棒磨磨矿细度为-74μm含量为84.62%,对应的最终精矿V2O5的品位为1.06%,回收率为84.65%。通过棒磨选择性磨矿,可在较低的磨矿细度和简单的浮选工艺流程条件下,实现含钒云母的富集并有效地降低提钒的处理量、酸耗和生产成本。
[Abstract]:In order to study the effect of grinding medium on selective grinding of stone coal, the selective grinding effect of steel bar and steel ball on calcined decarburized stone coal from Tongshan, Hubei Province, was investigated and the suitable grinding medium was determined. Then the suitable grinding fineness was determined by flotation test and mica dissociation degree analysis. The results show that there are great differences in the grindability of vanadium bearing mica and various gangue minerals, and both ball milling and rod grinding have the effect of selective grinding, that is, fine grained (-38 渭 m) and coarse grained (104 渭 m) V2O5 grade are higher. The V2O5 grade of intermediate grain (-10438 渭 m) is lower, but the particle size of rod mill is more uniform, the grade of V2O5 between grains is larger, and the selective grinding effect of rod mill is better than that of ball mill. The flotation test and the analysis of the dissociation degree of mica show that the optimum fineness of the rod mill is -74 渭 m, the corresponding final concentrate V2O5 is 1.06 and the recovery is 84.65. Under the condition of low grinding fineness and simple flotation process, the enrichment of vanadium bearing mica can be realized through selective grinding with rod mill, and the treatment capacity, acid consumption and production cost of vanadium extraction can be effectively reduced.
【作者单位】：武汉理工大学资源与环境工程学院;武汉科技大学资源与环境工程学院;钒资源高效利用湖北省协同创新中心;
【基金】："十二五"国家科技支撑计划项目(2015BAB03B05)
【分类号】：TD921.4

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