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浮选柱的选别效率的提高主要受尾矿浆回流混入泡沫区的限制,同时选别物料的回收率的提高又受到给矿流短路而进入尾矿的量所限制。目前浮选柱的结构高度一般都较大,约30～40ft(1ft=0.3048m),目的是要限制物料短路所造成的影响,如果浮选柱的物料流是接近于阻塞流的话,用高度小得多的浮选柱时也可减少这影响。本研究表明,在高度为6ft的实验室浮选柱中采用水平式的挡板时,可改善难选煤的选别性能。变更档板的位置进行试验表明,在给料口的上、下方均需安装档板,这样可获得最好的选别效果。用荧光着色剂作示踪剂进行试验表明,采用挡板时,在获得任何回收率的前提下均可使带入泡沫产品中的给矿水量减少。
Flotation column sorting efficiency is mainly affected by tailings slurry mixed into the foam zone restrictions, while the recovery rate of selected materials in turn by the short-circuit to the mine flow into the tailings to limit the amount. At present, the height of the flotation column is generally about 30-40 ft (1 ft = 0.3048 m) in order to limit the influence caused by material short circuit. If the flow of the flotation column is close to the blocking flow, the height A much smaller flotation column also reduces this effect. This study shows that when a horizontal baffle is used in a 6-ft-tall laboratory flotation column, the selectivity of difficult-to-process coal can be improved. Changing the position of the baffle showed that the baffle was installed above and below the feed opening so that the best sorting result was obtained. Testing with a fluorescent colorant as a tracer showed that with the baffle, the amount of mineral water brought into the foam product was reduced with any recovery obtained.