论文部分内容阅读
对甘肃某地尚未开发利用的磁铁矿进行工艺矿物学分析,结果表明,原矿全铁品位为28.36%,含铁矿物主要为磁铁矿,其次为菱铁矿、赤铁矿等,属于贫磁铁矿。脉石矿物主要为石英,其次为长石、铁白云石等。矿物嵌布复杂,嵌布粒度微细,磁铁矿呈浸染状或稠密浸染状嵌布在脉石矿物中,少有独立散状分布,主要粒度为-0.038mm,属于不均匀微细嵌布;石英中粗粒级多呈零散状或毗连状嵌布,细粒级多呈集合体团粒状或脉状嵌布,嵌布粒度为-0.15 mm,属于极不均匀嵌布。试验采用粗磨磁选抛尾,抛尾率为32.46%,对粗精矿再磨再选,可获得全铁品位为61.54%,回收率为74.04%的铁精矿。指标良好,流程简单,为微细嵌布贫磁铁矿的高效利用提供了借鉴。
The technological mineralogy analysis of magnetite that has not been exploited and utilized in a certain place in Gansu shows that the grade of total iron in the ore is 28.36%, the magnetite is mainly composed of iron minerals, followed by siderite and hematite, belonging to Lean magnetite. Gangue minerals are mainly quartz, followed by feldspar, iron dolomite and so on. Minerals embedded in complex, fine cloth embedded fine, disseminated disseminated magnetite or dense disseminated in gangue minerals, few independent scattered distribution, the main particle size of -0.038mm, are uneven micro-embedded; quartz In the coarse-grained mostly fragmented or contiguous inlaid, fine-grained mostly aggregates granular or vein-like cloth, embedded cloth size of -0.15 mm, are extremely uneven embedded. In the experiment, the coarse tailing magnetic tailing and tailing tailing rate were 32.46%. After re-grinding rough ore concentrate, the iron concentrate with the total iron grade of 61.54% and the recovery rate of 74.04% was obtained. Indicators are good, the process is simple, and provide a reference for the efficient use of micro-embedded lean magnetite.