Fine coal and three product dry beneficiation with vibration and double-density fluidized beds

Abstract

The fluidizing performance and density uniform stability of vibration fluidized beds were analyzed. The experimental results in 2000 mm×80 mm×200 mm model apparatus show that the vibration fluidized bed can efficiently separate fine coal of size 6–0.5 mm, the beneficiation lower limit is 0.5 mm, the E_p value is 0.07. A double-density fluidized bed was formed by which the bed structure was specially designed with a pyramidal part. It can efficiently turn out three products according to densities in a fluidized cascade. The suitable range of gas flow rate is 4.4–4.6 m³/h. In the lighter area, the separation density is around 1.49 g/cm³, and E_p value is 0.06. In the denser area, the separation density is about 1.85 g/cm³, and E_p value is 0.07.

Keywords

dry beneficiation / vibration fluidized bed / three-product separator