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Method and device for preparing uniform spherical particles

A technology of spherical particles and granules, which is applied in the field of preparing uniform spherical particles, can solve the problems of inconvenient balling of solid raw materials and uneven balling of liquid raw materials, and achieve controllable particle uniformity, high sphericity, and convenient balling Effect

Inactive Publication Date: 2018-01-12
张家港创博金属科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is that liquid raw materials are unevenly formed into balls, and solid raw materials are inconvenient to form into balls. Using molten raw materials to prepare spherical particles with uniform size and high sphericity, the method is simple and controllable

Method used

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  • Method and device for preparing uniform spherical particles
  • Method and device for preparing uniform spherical particles
  • Method and device for preparing uniform spherical particles

Examples

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Embodiment

[0015] Example: Preparation of nickel-based superalloy spherical powder.

[0016] Open the vent valve (11), open the door (15), place the collector (24) directly under the water-cooled copper crucible (3), close the door (15), open the upper cover (1), and put the crushed Put the nickel-based superalloy raw material into the water-cooled copper crucible (3), close the upper lid (1), and close the vent valve (11); use the mechanical pump (9) to pump the interior of the warehouse to a low vacuum of 1Pa, and then use The diffusion pump (10) pumps the chamber to a high vacuum of 0.001Pa, turns off the mechanical pump (9) and the diffusion pump (10), and injects high-purity argon into the upper chamber (2) and the lower chamber through the inlet valve (6) (14), so that the air pressure of the upper chamber (2) and the lower chamber (14) is balanced at 0.1MPa, and the ventilation valve (8) on the ventilation pipe (7) is closed; the water inlet pipe (17) and the water outlet pipe (22...

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Abstract

The invention relates to a method and a device for preparing uniform spherical particles. According to the method, a water-cooling copper crucible is adopted for accommodating a raw material; througha heater, the raw material is heated to achieve the molten state; by utilization of a differential extrusion method, the molten-state raw material is extruded out of tiny holes in a flow guiding module at the bottom of the crucible; meanwhile, the extruded molten-state raw material is cut into tiny particles by adopting a high-frequency vibration cutting method; after the cutting process, the tinyparticles fall; when passing through heating zones of induction heaters, the falling tiny particles are molten-state; under the surface tension action, the molten-state tiny particles are shrunk to be spherical; and when continuing falling, the shrunk tiny particles are cooled so as to form solid-state tiny spheres. By adoption of the method, the hole diameter can be adjusted by replacing a cutting module at the bottom of the crucible; the tiny spherical particles of different particle diameters can be prepared; the method is simple and controllable; the sizes of the formed particles are controllable; and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of metal spherical powder preparation, in particular to a method and device for preparing uniform spherical particles. Background technique [0002] Spherical powder usually refers to microparticles with a size between nanometers and millimeters, and the particle shape is spherical. The methods currently used are mainly: 1) atomization methods, such as gas atomization, centrifugal atomization, vacuum atomization, etc., The liquid raw material is atomized into tiny droplets with high-speed airflow, and then solidified into spherical powder after cooling. This method has high efficiency, but due to the atomization in the liquid state, the size uniformity of the prepared pellets is poor; 2) Uniform droplets Injection method, the raw material is melted in a crucible with a small hole at the bottom, and the liquid raw material is extruded from the small hole at the bottom of the crucible through a certain frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 李小宝
Owner 张家港创博金属科技有限公司
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