Auxiliary selection device for fluidized bed jet mill

Abstract

The invention discloses an auxiliary separation device for a fluidized bed air flow pulverizer. The auxiliary separation device comprises an air inlet room, a slag discharging room and an air distribution plate; a plurality of broken material nozzles are arranged on the side wall of the air inlet room, and the slag discharging room is arranged on the lower portion of the air inlet room; a plurality of broken material supplementing nozzles are arranged on the side wall of the slag discharging room, a slag discharging opening is formed in the lower portion of the slag discharging room, and the air distribution plate is arranged on the slag discharging opening of the slag discharging room; the air distribution plate is arranged in the slag discharging room in an inclined manner, a plurality of ventilation holes are evenly distributed in the air distribution plate, an auxiliary air inlet nozzle is arranged below the air distribution plate, and the direction of the auxiliary air inlet nozzle right faces the air distribution plate; and auxiliary pulverizing and auxiliary separating manners are adopted, the content of material fine powder discharged out of the slag discharging opening is reduced to the lowest, the pulverizing efficiency of the pulverizer is greatly improved, and work safety of the pulverizer is ensured.

Description

technical field [0001] The invention relates to the field of ultrafine crushing equipment for materials, in particular to an auxiliary selection device for a fluidized bed jet mill. Background technique [0002] Powder technology is regarded as one of the most important basic technologies to support high-tech industries. After the particles are refined, the specific surface area is large and evenly distributed, showing many excellent properties. It is used in fillers, dyes, pigments, medicines, catalysts, magnetic Widely used in memory components, advanced abrasives, solid lubricants, fine ceramics, cosmetics, etc. The methods of obtaining ultrafine powder are mainly mechanical and chemical methods. The chemical method is only used in a few special fields due to its complicated process and high cost; and the mechanical pulverization method is low in cost, high in output, simple in process, and can improve materials. It is widely used due to its advantages of performance and...

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Problems solved by technology

[0003] In the currently used jet mill, the material discharged from the slag outlet still contains a considerable amount of fine powder and materials that can be crushed. After analyzing these materials, it is concluded that the cause of the fine powder discharged from the slag outlet is Yes, one is because the air intake chamber adopts a row of surrounding nozzles, these nozzles can only convectively impact and crush the materials in the upper layer of the air flow, and when the raw materials are fed, due to gravity, a small part of the materials have not yet had time to occur When impacting, it will fall into the slag discharge chamber with the large particle size material group, and then produce fine powder and materials that can be crushed. Scattering produces fine powder. The production of these materials not only reduces the crushing efficiency of the pulverizer, but also produces more dust, which endangers the health of operators. In severe cases, it may cause safety accidents such as dust explosions

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