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艾兰铜矿选矿厂从1971年生产以来,由于矿体的某些矿带中有碳氢化合物的矿化作用,周期性地影响钼精矿的生产。这种碳氢化合物在浮选中和辉钼矿的可浮性相似,是精矿中的主要杂质。该问题在半工业试验厂试验开始时就已存在。结果在原流程设计中包括有二段试验用水力旋流器和备用浮选回路以分离碳氢化合物。投产后,这种流程在处理含有大量碳氢化合物的矿石时,不能获得满意的钼精矿品位。然后,艾兰铜矿和尤他国际公司泊洛阿尔托(Palo Alto)选矿研究室开始了大量的研究工作,以寻找分离碳氢化合物的其它方法。所研究的工艺包括优先浮选、焙烧、浸出、静电分离、重介质选矿和重力选矿。迄今,这些方法中,使用直径一英寸的旋流器证明是有效的,在经济的回收率条件下,能得到可出售的精矿品位。本文简述迄今为止进行的选矿厂和试验室研究工作,並叙述目前在使用的旋流器分离流程。
Since its production in 1971, the Allan Copper Concentrator has periodically affected the production of molybdenum concentrates due to the hydrocarbon mineralization in some of the ore bodies. This hydrocarbon is similar in flotation to molybdenite floatability and is a major impurity in concentrates. This problem already existed at the beginning of the pilot of the semi-industrial test plant. Results In the original process design, a two-stage pilot hydrocyclone and a spare flotation circuit were included to separate the hydrocarbons. After commissioning, this process does not give satisfactory levels of molybdenum concentrate when dealing with ores containing large amounts of hydrocarbons. Then, a large amount of research was carried out at the Palin Alto beneficiation laboratory at the Irland Copper and Utah International companies to find other ways to separate hydrocarbons. Processes studied include preferential flotation, roasting, leaching, electrostatic separation, heavy medium beneficiation and gravity beneficiation. To date, the use of one-inch diameter cyclones in these processes has proved effective, with the availability of commercially available concentrate grades at economical recovery rates. This article outlines the beneficiation plant and laboratory studies carried out to date and describes the cyclone separation process currently in use.