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Metal powder preparation device and method therefor

A technology of metal powder and preparation equipment, which is applied in the field of metal powder preparation equipment, can solve the problems of difficulty in ensuring the control of ultrafine powder content, difficulty in continuous powder preparation for a long time, and unfavorable guarantee of powder quality, so as to improve the production environment and improve the quality of the powder. The degree of equipment automation and the effect of ensuring the screening accuracy

Active Publication Date: 2012-09-26
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

U.S. Patent US4207040 proposes a method for preparing powder, but it belongs to intermittent powder preparation technology rather than integrated technology, it is difficult to continuously prepare powder for a long time, and it is not conducive to ensuring the quality of powder; Chinese Patent 200410079654.4 and Chinese Patent 200410021160.0 have the same problems, and it is not conducive to obtaining a better powder shape, and it is difficult to ensure the control of the ultrafine powder content; US483892 provides a method for recycling the atomized gas, which purifies the atomized gas and liquefies it under pressure, and then It is converted into high-pressure gas and put into use. The disadvantage is that the processing cost is high, which is not conducive to reducing product prices and improving product competitiveness.

Method used

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  • Metal powder preparation device and method therefor
  • Metal powder preparation device and method therefor
  • Metal powder preparation device and method therefor

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preparation example Construction

[0054] The preparation method of the metal powder of the present invention includes atmosphere preparation, metal smelting, melt transportation, atomization, floating powder settlement, pneumatic classification, mechanical screening, gas purification, gas driving, gas cooling and other links. Before entering the atomization, the system atmosphere preparation and metal smelting must be completed. First, the atomization chamber is evacuated and inflated to prepare the atmosphere; after the metal is melted and processed in the smelting furnace 1, it is connected to the atomization furnace 3 through the infusion tube 2, and then through the infusion The tube 4 and the conduit 5 pour the molten metal onto the atomizer 6, which forms a mist through the action of the atomizer 6, and the mist droplets fly, cool, and solidify in the atomization chamber 8 to form a powder. Under the action of the air, it is sent to the pneumatic classifier 15 for classification, and the coarse powder aft...

Embodiment 1

[0060] Atomized SnAg 3 Cu 0.5 . The system is evacuated to 50Pa, filled with nitrogen and 100ppm oxygen to 40KPa to prepare for atomization. Add Sn, Ag, and Cu into the vacuum melting furnace 1 according to the designed ratio, and then smelt at 330°C after vacuuming and inflating. The turntable is driven to rotate at a speed of 50000rpm for atomization, and the oxygen content in the atomization chamber 8 is stabilized at 100ppm. Under the action of gravity and airflow, the powder enters the centrifugal classifier for classification, and the centrifugal classifier cage rotates at 750rpm. The coarse powder separated by the centrifugal classifier passes through the transfer of the intermediate bin 21, and is transferred out from the closed system to the screening funnel 24, and then sieved by the rotary vibrating screen to obtain the finished powder (see the photo of the powder appearance figure 2 , the particle size distribution see image 3 ). The ultra-fine powder enter...

Embodiment 2

[0062] Nebulized SnBi58. The system is evacuated to 50Pa, filled with nitrogen and 80ppm oxygen to 30KPa to prepare for atomization. Add Sn and Bi into the vacuum melting furnace 1 according to the designed ratio, smelt at 200°C after vacuuming and inflating, and pour the melt into the atomizing furnace 3 after purification treatment, and then supply the atomizer through the infusion channel, the mist The atomizer adopts an ultrasonic atomizer with a vibration frequency of 60KHz to atomize the melt, and the oxygen content in the atomization chamber 8 is stabilized at 80ppm. The powder enters the centrifugal classifier 15 under the action of gravity and airflow for classification, and the centrifugal classifier cage rotates at a speed of 500 rpm. The coarse powder separated by the centrifugal classifier passes through the transfer of the intermediate bin 21, and is transferred out from the closed system to the screening funnel 24, and then sieved by the rotary vibrating screen...

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Abstract

The invention relates to a metal powder preparation device and method therefor. The device comprises an atomization furnace, a heater, a cooler, an atomization chamber, an atomizer, a pneumatic classifier, a middle bin, a sieving funnel, a screening machine, a deduster, a balance tank, a shell-and-tube heat exchanger, a vacuum obtaining device, a control system, an infusion tube, a conduit, a pipeline, a gas channel, a pneumatic butterfly valve, an electromagnetic valve and the like. The method comprises atmosphere preparation, metal smelting, infusion, centrifugal atomizing, pneumatic classification, mechanical screening, gas purification, cooling and the like, the metal is smelted and treated so as to be poured onto the atomizer for centrifugal atomization to form powder, the powder is classified by the pneumatic classifier, after classification, rough powder is screened by the mechanical screening so as to obtain the finished powder, fine powder is sent into the deduster by airflow for purification, the purified gas is driven by a high pressure centrifugal fan so as to be speeded up to be atomized and classified again after being subjected to heat exchange through the shell-and-tube heat exchanger. The device can be used for continuous production of spherical powder below -320 meshes, and the oxygen content is less than or equal to 80ppm.

Description

technical field [0001] The invention relates to a metal powder preparation device and method, which applies the integrated technology of metal melting, powder atomization and powder classification to powder preparation in the powder industry, and belongs to the technical field of metal powder preparation. Background technique [0002] High-performance functional powder material is a kind of powder material that is directly used by utilizing the inherent physical and chemical characteristics of the material itself. It has excellent physical properties such as good fluidity, large specific surface area, and uniform composition, as well as excellent chemical properties. It can effectively improve the performance of the material and reduce the production cost, so it has high requirements for the preparation technology. Especially in the case of global resource and energy shortages, all kinds of high-tech products are developing in the direction of lightweight, miniaturization an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
Inventor 张少明徐骏胡强贺会军朱学新林刚王志刚李志刚
Owner BEIJING COMPO ADVANCED TECH
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