Powder surface cleaning equipment and cleaning method

Abstract

The invention discloses powder surface cleaning equipment and cleaning method in the technical field of materials. The equipment comprises a circulating water inlet, a metal sleeve, a water inlet valve, an electric field anode, a filter screen, a water outlet valve, a circulating water outlet, a circulating pool, a stirring blade, a water pump, a circulating water outlet valve, a reclaiming valve, a reclaiming pipeline, a sealing ring, an electric field cathode, a circulating water inlet valve and an electric field separation container. The method, based on an ionic electric migration technology, realizes the separation of zwitterions and achieves the aim of removing ions from the powder surface. In the realization process, under the action of an electric field, the zwitterions leave awayfrom the surface of powder particles and go close to both ends of an electrode so as to separate the zwitterions from the powder. The suitable powder has the granularity of 10nm-100 microns and adopts non-conductive or conductive powder. Compared with the traditional method which singly relays on filtration and a plurality of repeated flushing in clear water, the invention has the advantages of high cleaning efficiency, good cleaning effect, convenient operation and simple equipment.

Description

technical field [0001] The invention relates to equipment and methods in the field of material technology, in particular to a powder surface cleaning equipment and cleaning method. Background technique [0002] With the continuous development of material technology, the application of submicron and even nanometer powders is becoming more and more extensive. Due to the huge specific surface area of ​​submicron or nanometer powder, the surface effect and interface effect show many unique physical and chemical characteristics, and can be made into various shapes such as spherical, polygonal, and thin slices according to the application. Such powders Materials have been widely used in chemical catalysis, electromagnetism, optics, mechanics, electronic information, fuel cells and biomedicine. People have used different methods to prepare various nano-powders, but after the powder synthesis reaction is completed, a variety of anions and cations remain in the solution, and if they...

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Problems solved by technology

People have used different methods to prepare various nano-powders, but after the powder synthesis reaction is completed, a variety of anions and cations remain in the solution, and if they are not cleaned, the performance of the nano-powders will be affected

[0003] After searching the existing technology, Dong Qiang and Ji Zhaoquan published an article in the Supplement of "Journal of Silicates" on October 30, 2002 - "Basic Research on the Cleaning Process of Nano-ceramic Powder Prepared by Wet Chemical Method". It is proposed that due to the small particle size, large specific surface area, and strong surface physical and chemical effects of powder particles, there is a strong tendency to agglomerate. The traditional separation method using filter cloth as the filter medium should be used for residual ion cleaning, such as plate and frame filter press, When performing solid-liquid separation such as centrifugation, a dense filter cake layer that blocks the filter medium will be formed, and impurity ions will be wrapped in it, making it difficult to achieve the cleaning effect. At the same time, the filtration rate will decrease rapidly, and the solid-liquid separation efficiency will be low. Large body loss

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