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光激发光是激光激发荧光 (LIF)分析法中所用的物质的物理性质。发荧光的矿物以前是收藏家用的语术 ,今天 ,人们已经认识到所有的矿物都可以发荧光。用功率强大的超紫外激光甚至可使氧化铁激发出荧光。用激光激发荧光分析仪已实现了特定荧光发光对不同矿物的工业应用。这些在线装置的特点是不接触被测的矿物 ,具有实时模式 ,测量距离可改变。本工作中 ,试验了两种类型的激光激发荧光分析仪。在采用分层崩落采矿法的铁矿山中 ,一台激光激发荧光分析仪悬挂在放矿点和矿石溜矿点之间的运输平巷的顶板上。它可对前端式装载机的料斗中的矿石进行光学取样 ,分析仪可立即将矿石要送到的地点通知给装载机的司机。另一台分析仪安装在铁选矿厂的运输皮带上 ,它可提供矿石流的质量信息。
Photoexcited light is the physical property of the material used in laser induced fluorescence (LIF) analysis. Fluorescent minerals used to be collector’s words, and today people have realized that all minerals can fluoresce. Powerful ultra-violet lasers can even cause iron oxide to fluoresce. The industrial use of specific fluorophores for different minerals has been achieved with laser-excited fluorescence analyzers. These on-line devices are characterized by non-contact with the minerals under test, real-time mode, and variable measuring distances. In this work, two types of laser-excited fluorescence analyzers were tested. In iron mines that employ layered caving mining, a laser-excited fluorescence analyzer is suspended on the roof of a transport lane between the ore-splitting point and the ore-handling point. It optically samples the ores in the front loader’s hopper, and the analyzer immediately notifies the driver of the loader about where the ore will be delivered. Another analyzer installed on the iron ore dressing belt, which provides information on the quality of the ore stream.