摘要
为了解决选煤厂粗煤泥的分选难题、提高粗粒煤的分选效果,基于重浮耦合原理开发了一种充气式液固流化床分选粗煤泥的流态化分选机,利用该分选机在实验室开展了1. 000～0. 125 mm粗煤泥的分选试验。试验结果表明:随着上升水流速率、充气量和药剂用量的增加,精煤灰分、精煤产率、可燃体回收率都随之升高;在上升水流速率30 mm/s、充气量0. 36 m~3/h、起泡剂用量0. 062 85 mmol/L的条件下,分选效果最佳;对比常规液固流化床分选试验,可以看出充气后精煤中各个粒级的产率明显增加,尾煤中各个粒级的产率明显降低,粗颗粒回收率提高了29. 12%,可能偏差Ep达到0. 08,分选效果明显优于传统液固流化床分选机。
In order to solve the problem of coarse coal separation in coal cleaning plant,improve the effect of coarse coal separation,an inflatable liquid-solid fluidized bed separator is developed on the basis of the principle of gravity floating coupling for the coarse coal,and the separation tests are conducted for coarse coal with size of 1.000～0.125 mm in the lab.With the increase of the superficial water velocity,aeration quantity and frother dosage,the fine coal ash,the fine coal yield and the recovery rate of the combustible body are all increased.When the superficial water velocity is 30 mm/s,aeration quantity is 0.36h,and the frother dosage is 0.062 85 mmol/L,the separation effect is the best.Compared with traditional liquid-solid fluidized bed separation test,it can be seen that the production rate of each grade in the clean coal is significantly increased,and the yield of each grade in the tail coal is significantly reduced,and the recovery rate of coarse particles is increased by 29.12%,and the Ep(Ecart probable)is 0.08,and the separation effect is significantly better than that of traditional liquid-solid fluidized bed separator.
引文
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