Airflow mill of multifunctional fluidized bed

Abstract

The invention relates to an airflow mill of a fluidized bed, in particular to an airflow mill of a multifunctional fluidized bed, which comprises a pulverizing modification part of a large amount of materials and a machine base, wherein the pulverizing modification part of a large amount of materials is fixedly connected with the machine base by a bolt; the airflow mill of the fluidized bed is characterized in that the lower end of the pulverizing modification part of a large amount of materials is connected with the upper end of a pulverizing auxiliary modification part of a little materialsby a flange, and a small pulverizing cavity in the pulverizing auxiliary modification part of a small amount of materials is communicated with a big pulverizing cavity in a cylinder body of a fluidized bed of the pulverizing modification part of a large amount of materials; and a plurality of groups of modifier injection atomizing nozzles are fixedly connected to the inner wall of the lower part of the cylinder body of the fluidized bed, the number of the modifier injection atomizing nozzles corresponds to that of a plurality of groups of opposite flushing type pulverizing spray nozzles, the modifier injection atomizing nozzles are positioned at an adjacent position at the upper part corresponding to the opposite flushing type pulverizing spray nozzles, and an input joint of the modifier injection atomizing nozzles is positioned outside the cylinder body of the fluidized bed. The airflow mill of the fluidized bed both has a function of superfine pulverizing to a small amount of materials and a function of modified pulverizing to the surface of a powder body.

Description

technical field [0001] The invention belongs to the field of powder engineering, and in particular relates to a fluidized bed jet mill, which is used for superfine pulverization and surface treatment. Background technique [0002] Fluidized bed jet mill is a kind of flow energy crushing device developed by German Alpine company in the early 1980s. It has been widely used because it overcomes the common problems of wear and particle size control in other jet mills. It is also an important means of ultrafine pulverization in the modern powder processing industry. In the development and improvement of the fluidized bed jet mill, some patents have been disclosed in China. Crushing and grading, and different specifications correspond to different processing capabilities. This leads to two practical problems in the application of the existing fluidized bed jet mill: one, when using the fluidized bed jet mill of production specifications, although it can meet the ultrafine grindi...

AI Technical Summary

Problems solved by technology

This leads to two practical problems in the application of the existing fluidized bed jet mill: one, when using the fluidized bed jet mill of production specifications, although it can meet the ultrafine grinding requirements of a large amount of materials above hundreds of kilograms per hour , but limited by the principle of fluidized bed jet mill, it is not possible to ultrafinely pulverize and classify a small amount of materials of 2 to 10 kg, unless a laboratory-sized small fluidized bed jet mill is used; second, the existing The fluidized bed jet mill does not have the function of spraying the liquid evenly into the grinding flow field after atomization, and fully mixing, contacting and adsorbing with the solid material to be pulverized, so it cannot meet the requirements of a certain degree of crushing of the material during the pulverization process. Surface Modification Requirements

These two problems cannot be solved by the existing fluidized bed jet mill due to the limitation of structure and principle

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