摘要
用脱泥-浮选方法对低品位石煤矿进行钒的预富集。通过X荧光光谱分析(XRF)、X射线衍射分析(XRD)和扫描电镜(SEM-EDS)方法对该矿进行矿物组成及微观结构分析。结果表明,在酸性条件下,使用醚胺(EA)作为捕收剂可以将石煤中含钒矿物与脉石矿物进行分离。通过脱泥-浮选流程,最终得到的钒精矿中五氧化二钒的品位为1.88%,回收率为76.58%,并且抛除了72.51%的尾矿。对低品位石煤矿进行钒的预富集,可以提高五氧化二钒的品位,降低耗酸物质的含量及冶炼成本。
Pre-concentration of vanadium from low-grade stone coal by the method of desliming-flotation was investigated. The mineral composition and microstructure of stone coal were studied systematically by means of X-ray fluorescence spectrometry （XRF）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results show that selective separation of vanadium-bearing minerals can be achieved by flotation in acidic solution using melamine （EA）. The final vanadium concentrate with V2O5 grade of 1.88% and recovery rate of 76.58% is obtained by desliming-flotation process and 72.51% of the raw ore is rejected as tailings. The pre-concentration of vanadium from low-grade stone coal can increase V2O5 grade and decrease the content of acid consuming minerals, which would enable economical utilization of metallurgical vanadium extraction technology.
基金
Project (2012BAB07B05) supported by the National Technology Support Project of China
Project (2013zzts066) supported by Independent Innovation Foundation of Central South University,China
关键词
钒
石煤
浮选
预富集
vanadium
stone coal
flotation
pre-concentration
