Fine coal and three product dry beneficiation with vibration and double-density fluidized beds
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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.
Key words
dry beneficiation vibration fluidized bed three-product separatorPreview
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References
- 1.Geldart D. Types of gas fluidization. Powder Technol, 1973,7:285–292CrossRefGoogle Scholar
- 2.Granfield R R. Solids mixing in fluidized beds of large particles. A I Ch E Symp Ser, 1978,74(176):54–59Google Scholar
- 3.Geldart D, Harnby N, Wong A C. Fluidization of cohesive powders. Powder Technol, 1984,37:25–37CrossRefGoogle Scholar
- 4.Geldart D, Wong A C. Fluidization of powder showing degrees of cohesiveness. Chem Eng Sci, 1985,40:653–661CrossRefGoogle Scholar
- 5.Lin J S, Chen M M, Chao B T. A novel radioactive particle tracking facility for measurement of solids motion in gas fluidized beds. A I Ch E J, 1985,31:465–473Google Scholar
- 6.Chen Q R, Wei L B, Liang C C. Three-product separator with double-density-air-dense media fluidized beds. Chinese Patent ZL, 96231636. 9. April 10, 1996Google Scholar
- 7.Ryzhkov A F, Kipnis I E. Engineering methods of analysis of devices with a vibrationally fluidized bed. J Eng Physics, 1991,60:687–692CrossRefGoogle Scholar
- 8.Hasatani M, Itaya Y, Miura K. Drying of granular materials in a inclined vibrated fluidized bed by combined radiative and convective heating. Drying Technol, 1991,9:349–366Google Scholar
- 9.Wei L B, Chen Q R, Zhao Y M. Study on the double-density fluidized bed. J Basic Sci & Eng (in Chinese), 1996,4:275–279Google Scholar
- 10.Wei L B. Segregation and mixing of two types of particles in airdense media fluidized beds. The Chinese J Nonferrous Metals (in Chinese), 1997,7(Suppl.3):7–9Google Scholar