Fofluidized Dry Beneifciation Of Lignite In Compoundrce Force Field

The fluidized separating and drying behaviours of lignite in compound forcefield were researched on the basis of the fully used of theoretical knowledge such asfluidization, mineral processing, mass and heat transfer, particuology. The transfermechanism of surface water in the progress of dry beneficiation of lignite wasanalysised and the influences from surface water, drying temperature, air flow, dryingtime and particle size of the lignite were discussed in detail. In the paper, the adhesionbehaviour of dense medium in fluidized dry beneficiation and drying of lignite wasstudied. The author discussed the factors which had affected the adhesion, analysisedthe cause of consumption of dense medium, tested the adhesion strength by two ways,submitted the methods to cut down the medium consumption before de-medium, andsummarized the relationship between surface water removal and dense mediumadhesion. For further research on the fluidized separation of lignite, the authordiscussed the influence of lignite drying for separation. The reasonably parameters ofdrying and beneficiation were achieved by the utilization of cooperated optimization.At last, the conveying characteristics of heavy product in compound force field werestudied. All the researches above can lay the foundation for the integration technologyof lignite “classification and separation-drying-gasifying”.