Device and method for adopting electronic reaction beam for making ultrafine metal powder

Abstract

The invention belongs to metal powder processing equipment and relates to a device and a method for adopting an electronic reaction beam for making ultrafine metal powder. According to the device, a crucible is arranged in an inner cavity of a vacuum evaporation chamber; a loading device and an electronic gun are arranged on a chamber wall; the vacuum evaporation chamber is communicated with the inner cavity of a vacuum receiving chamber through a pipeline with a vacuum valve; the inner cavities of the vacuum evaporation chamber and the vacuum receiving chamber are both connected with a vacuum pumping system controlled by a controller; a separator is arranged on an air outlet of the vacuum receiving chamber; the electronic gun is connected with a power controller; a circulating cooling device is arranged on each of the vacuum evaporation chamber and the vacuum receiving chamber. According to the method, a metal block is put into the crucible by the loading device, and after the metal block in the crucible is bombarded into gaseous metal by the electronic gun, the gaseous metal is collected by the vacuum receiving chamber and is cooled and separated by the separator, so that the ultrafine metal powder is achieved. The device and the method have the advantages of low energy consumption, high purity, wide application scope and suitability for the preparation of various ultrafine metal powder.

Description

technical field [0001] The invention belongs to the technical field of metal powder processing equipment, in particular to a device and method for producing ultrafine metal powder by using electron reaction beams. Background technique [0002] At present, the method of preparing metal ultrafine powder at home and abroad mainly adopts chemical method and plasma arc energy reaction to prepare. The production process of chemical method is complicated, the cost is high, and it causes serious pollution to the environment. The disadvantage of plasma arc energy reaction preparation is that it destroys the original material. Product purity, during the preparation process, a large amount of gas used for the arc ignition flame is injected into the furnace, causing mixed impurities with the metal gas to enter and because of the plasma arc ignition, high temperature resistant conductor materials must be used to continuously generate the arc ignition to consolidate the arc and produce an ...

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Problems solved by technology

[0002] At present, the method of preparing metal ultrafine powder at home and abroad mainly adopts chemical method and plasma arc energy reaction to prepare. The production process of chemical method is complicated, the cost is high, and it causes serious pollution to the environment. The disadvantage of plasma arc energy reaction preparation is that it destroys the original material. Product purity, during the preparation process, a large amount of gas used for the arc ignition flame is injected into the furnace, causing mixed impurities with the metal gas to enter and because of the plasma arc ignition, high temperature resistant conductor materials must be used to continuously generate the arc ignition to consolidate the arc and produce an open flame. Continuous consumption (such as tungsten metal materials), etc., are directly sprayed into the metal materials to be processed. The tungsten and oxygen content of metal ultrafine powders prepared by this method are seriously exceeded, and the application is subject to certain restrictions.

[0003] Using the reaction energy of the plasma arc cabinet to heat and process the metal ultrafine powder, the energy consumption is large, because the plasma arc produces a high-temperature flame, but the high-temperature flame forms a contact area with the metal liquid surface (80mm) 2 ~300mm 2 Between) less, it is impossible to conduct high-temperature energy heating reaction on the metal liquid surface in a large area, resulting in large energy consumption

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