Metal ultrafine atomizing, crushing and grading system and metal atomizing device thereof

Abstract

The invention provides a metal ultrafine atomizing, crushing and grading system, comprising a metal smelting furnace, a metal hydrogen-discharging and heating furnace, a metal atomizing device, a fluidized bed depolymerization grader, a second precise grader, at least one collector, a filter and a compressor. The invention also provides a metal atomizing device, comprising a crucible, a spray disc, a spray cover and a cylindrical spray cylinder, wherein a circle of evenly distributed inclined holes is respectively arranged on at least two circumferences with different diameters of the spray disc; each inclined hole is provided with a Laval nozzle; and the extension line of each Laval nozzle is intersected with the central axis of the spray disc at the same point. Through the airflow with ultrasonic velocity, ultralow temperature and large velocity pressure generated by the nozzle in the metal atomizing device, the liquid metal or alloy is directly crushed, or rapidly cooled into atomized powder and then depolymerized by a fluidized bed and precisely graded by the precise grader to obtain metal fine powder and ultrafine powder with finer granularity, more even granularity and better granularity sphericity.

Description

technical field [0001] The invention relates to a production and preparation of metal ultrafine atomization and crushing, in particular to a production equipment for liquid metal ultrafine atomization and ultrafine crushing and grading. Background technique [0002] With the increasing application of fine powders of pure metals and alloyed metals in high-tech new materials, especially in the field of new clean energy, a large number of pure metals and alloy powders with an ultrafine particle size of less than 10 μm, good spheroidization, and uniform particle size distribution are required . [0003] At present, there are certain problems in most metal atomization micro-technology in the world: the output rate of micro-powder is low (less than 20% to 30%), and the metal mass flow rate of the equipment is generally less than 1kg / min; There are fewer ultra-fine powder devices with a particle size of less than 10 μm. Contents of the invention [0004] In view of the deficien...

AI Technical Summary

Problems solved by technology

[0003] At present, there are certain problems in most metal atomization micro-technology in the world: the output rate of micro-powder is low (less than 20% to 30%), and the metal mass flow rate of the equipment is generally less than 1kg / min; There are fewer ultrafine powder devices with a particle size of less than 10 μm

Images