Production process of high-purity aviation-grade rhenium particles

Abstract

The invention discloses a production process of high-purity aviation-grade rhenium particles. The process comprises six procedures of ammonium perrhenate pretreatment, high-temperature reduction, grinding classification, compression molding, high-temperature sintering and surface treatment, and comprises the following steps: in the production process of rhenium particles, compressing two times ofhigh-temperature reduction into one time of reduction, and meanwhile, compressing two times of high-temperature sintering into one time of sintering to obtain. The process flow is shortened, the process doping links are reduced, the processing period is shortened, the processing cost is correspondingly reduced, the size and density of the rhenium particles can be adjusted according to needs, high-purity aviation-grade metal rhenium particles can be manufactured through the production process of the rhenium particles, the purity of the rhenium particles is larger than 4 N, and the content of 73impurity elements is smaller than 1-5 ppm.

Description

technical field [0001] The invention belongs to the technical field of metal rhenium production, and relates to a production process of using ammonium perrhenate to produce metal rhenium, in particular to a production process of high-purity aviation-grade rhenium grains. Background technique [0002] Rhenium is a silver-white heavy metal that belongs to the sixth period transition metal in the periodic table of elements. It is one of the rarest elements in the Earth's crust, with an estimated average concentration of one part per billion, and one of the highest melting and boiling points. Commercial rhenium is generally in the form of powder, which can be pressed or sintered in vacuum or hydrogen to make a high-density solid, and its density is more than 90% of the metal state. Now, rhenium and its alloys are widely used in aerospace, electronics, petrochemical and other fields. [0003] In the refining process of copper sulfide ore, rhenium can be extracted from the roast...

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Problems solved by technology

[0006] At present, ammonium perrhenate is used to produce metal rhenium in China, and ammonium perrhenate pretreatment, ammonium perrhenate secondary reduction, sintering and other processes are mostly used. However, it is difficult to produce high-purity aviation-grade metal rhenium particles with existing processes.

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