Method for producing beryllium prill using plasma auxiliary rotating electrode

Abstract

The invention relates to a method for preparing a Be prill by centrifugal process of a plasma assisted rotary electrode. In a closed container protected by inert gases, the high temperature generated by glow discharge generated between the plasma assisted rotary electrode and a rotary cylindrical consumption Be electrode manufactured by the metal of Be is utilized for leading one section of Be electrode that is close to the voltaic arc of the plasma to form small drops of Be; the small drops of Be are thrown away by centrifugal force; the small drops of Be are cooled in air and solidified into sphere in the closed container under the environment of the inert gases, thus the Be prill is obtained. The method can obtain the prills with an average sphere diameter between 0.05mm to 2mm with good monodispersity by changing the technique parameters. The prepared Be prill has excellent sphericity and lower deformed particle proportion; besides, the sphere diameter is controllable; the Be prill can be used on the blanket or the fusion reactor of an ITER experiment for producing tritium in a solid state.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to a method for preparing beryllium metal pellets by adopting a plasma-assisted rotating electrode centrifugal process, and the prepared beryllium metal pellets can be used for a beryllium pellet bed clad in an ITER solid-state tritium production experiment. The beryllium metal balls prepared by the method can also be used as structural materials in the aerospace field by taking advantage of its light weight and relatively high melting point characteristics. Background technique [0002] The cladding of the solid-state tritium value-added agent tritium production experiment designed by the Southwest Institute of Nuclear Industry for the International Thermonuclear Experimental Reactor (ITER) has a special functional part called a beryllium pebble bed, which requires a small diameter, good sphericity, single Beryllium metal pellets with good dispersibility are used...

AI Technical Summary

Problems solved by technology

The basic principle of this method is to utilize the following reaction (BeF 2 +Mg→Be+MgF 2 ) in combination with the melting spray process, if the obtained beryllium beads are applied to the fusion reactor cladding, there are the following problems: one, the beryllium beads prepared by the magnesia thermal reduction method have a large particle size, and the average particle size exceeds 5mm

2. The sphericity of beryllium beads prepared by magnesia thermal reduction method is not good, and the proportion of deformed particles is high

3. The mechanical strength of beryllium beads prepared by magnesia thermal reduction method is poor

Generally speaking, domestic beryllium beads cannot replace beryllium metal pellets as functional materials for fusion reactors.

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