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Experimental Research on Ultrafine Grinding of Desulphurization Ash by Kinetic Energy Mill with Superheated Steam

2014; Linguagem: Inglês

Shi Ya,

Geoscience and Mining Technology

The ultrafine desulphurization ash was prepared by kinetic energy mill with superheated steam. The effect of classifier speed, crushing pressure and steam inlet temperature on the particle size and output of the ultrafine desulphurization ash was investigated. The morphology of the ultrafine desulphurization ash was analyzed. The results show that when the classifier speed is 1 500 r/min, the output of ultrafine desulphurization ash is decreased by 34.1% than that of classifier speed of 900 r/min. The particle size of ultrafine desulphurization ash is diminished and the particle size range is narrowed. When the grinding pressure is 0.5 MPa,the output of ultrafine desulphurization ash is increased by 31.8% than that of grinding pressure of 0.25 MPa. When the steam inlet temperature is300 ℃, the output of ultrafine desulphurization ash is increased by 46.8%than that of steam inlet temperature of 200 ℃. The particle size and particle size range of the ultrafine desulphurization ash decrease when the grinding pressure or the steam inlet temperature is improved. In the actual product ion process, the grinding pressure and steam inlet temperature should not be too high and should be controlled in a reasonable range according to different materials. The desulphurization ash grinded by kinetic energy mill with superheated steam has good morphology features.