With the development of powder metallurgy industry, the fine-metal-powder classification becomes one of the vital techniques in powder technology. A pneumatic classifier without screen and mechanical moving parts is designed and developed. Theoretical analysis and experiments of Pneumatic-Classification was conducted. The oversize ratio in fine powder can be reduced to less than 5% and the undersize ratio in coarse powder less than 15% when the air flow is suitable. The classification effect is satisfactory for the customers.
With the development of powder metallurgy industry, the fine-metal-powder classification becomes one of the vital techniques in powder technology. A pneumatic classifier without screen and mechanical moving parts is designed and developed. Three samples are used in the pneumatic classification experiments and the separation sizes are 45μm, 45μm and 30μm, respectively. The oversize ratio in fine powder can be reduced to less than 5% and the undersize ratio in coarse powder less than 15% when the air flow is suitable, simultaneously. The classification effect is satisfactory.
Based on the study of normal emulsion process of floatation reagents, the idea which uses Pneumatic injection to spray the floatation reagents is proposed. The paper introduced the structure and the performance of the Pneumatic injection atomizer. More than 24% of the dosages were saved. Pneumatic injection atomizer offers simple structure and low energy consumption, which is 0.388kw/h.It was proved by the diameter results obtained by the laser particle size analyzer that Pneumatic injection atomizer offers good dispersing effect. When the air pressure is 0.08MPa, the average diameter of droplet is 7.89µm.
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