A jet classification and purification method and device for ultrafine powder

Abstract

The invention discloses a novel ultrafine powder jet classification purification device. The device mainly comprises a classification box, a feeding device and auxiliary airflow devices; the classification box includes a box body, three powder dust collecting bags, a Condar block fixed at the bottom of the classification box, a support base, a rotating shaft fixed on the support base, a dial fixed at the tail end of the rotating shaft and arranged on the outer side of the box body, and a rotating handle; the feeding device includes a pressure adjusting valve, a flow adjusting valve, an air-solid mixing cavity, a pipe and an adjustable fan-shaped nozzle; the adjustable fan-shaped nozzle is fixed on the rotating shaft; the tail end of the adjustable fan-shaped nozzle is connected with the air-solid mixing cavity below the bottom of the box body through an air pipe and a converting joint; and the auxiliary airflow devices include pressure adjusting valves, flow adjusting valves, pipes and fan-shaped nozzles, and are distributed on a right side plate of the box body by a certain rule. The device is simple in structure, low in manufacturing cost, environment-friendly and energy-saving, and mainly solves such technical problems as difficult purification, low classification precision and difficult classification particle size control in traditional impurity-contained ultrafine powder.

Description

technical field [0001] The invention relates to the field of powder jet purification and classification, in particular to a jet classification and purification method and device for ultrafine powder. Background technique [0002] Ultrafine powder technology is the basis for transforming and promoting the development of emerging industries such as paint coatings, information recording media, fine ceramics, electronic technology, new materials and biotechnology, and is the starting point of modern high-tech. Among ultra-fine powder classification technologies, jet classification is favored for its simple structure, no need for power, low operating cost, and convenient operation and maintenance. With the development of modern technology, some high-tech and cutting-edge industries that are closely related to the particle size of raw materials have a trend of becoming more and more strict on their raw materials, not only requiring ultra-fine raw materials, but also requiring unif...

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Problems solved by technology

[0003] In view of the above-mentioned problems, the present invention mainly utilizes the adjustable spraying angle of the feed pipe nozzle and the air pressure controllability of the multi-end auxiliary airflow to maximize the Coanda effect of the micro-powder, thereby solving the problem of ultra-fine powder containing impurities. Difficulty in jet classification and purification, difficulty in controlling the classification particle size, and low classification accuracy

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