Wet method accurate sizing technique for preparing superfine function powder

Abstract

The invention discloses a wet precise classification process used for preparing a superfine functional powder, comprising the following steps: firstly, slurrying is carried out to the prepared initial inorganic material powder, the slurried inorganic material powder suspending liquid is transported to a continuous centrifuge, the split suspending liquid in the centrifugal process is separated anddried, and the finished product is obtained and stored; separation is carried out to the unspilt suspending liquid in the continuous centrifugation to obtain a condensate which is slurried and groundand then enters the continuous centrifuge to be centrifuged. The wet precise classification process has the advantages of less investment, less energy consumption, simple process, no pollution, and the like; and the powder material prepared by the classification process has the characteristics of small particle size, high particle distribution controllability, high functional compound, high purity and the like.

Description

technical field [0001] The invention relates to a wet classification process, in particular to a wet classification process utilizing sinking-floating suspension. Background technique [0002] With the development of science and technology, we often need materials that can not only adapt to harsh conditions such as high temperature, high pressure, and high hardness, but also have special properties such as luminescence, conductivity, electromagnetic, and adsorption. With the continuous deepening of research, the development of ultrafine powder, a new material system, has gradually entered people's field of vision and has begun to be valued by various countries. The development of ultra-fine powder materials in Japan involves 70 companies and more than 50 research institutions; the science and technology development strategy and five-year development plan proposed by the Korea Institute of Science and Technology mentioned the projects that play a pioneering role in the next g...

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Problems solved by technology

[0005] At present, the research and development of inorganic ultrafine powder materials in my country has just started, and the supporting powder industry has not yet been established, and ultrafine powder materials are still mainly imported

In addition, due to the high technical difficulty, most of the ultrafine powder processing technologies developed by many scientific research institutes are still in the stage of dry separation and screening, and the produced ultrafine powder materials often have large particle sizes (above 10 μm), It has disadvantages such as low purity (less than 10% effective particles), weak functional compounding, and low degree of refinement (such as particle size distribution is difficult to control), and the production cost of the existing process is relatively high, the process is complicated, and it is difficult to Carry out large-scale industrial application

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