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A kind of equipment and process for preparing spherical metal powder

A metal powder and spherical technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of easy doping and deterioration of powder, difficult storage and use, and rising, so as to achieve not easy deterioration, convenient storage and use, and stable properties Effect

Active Publication Date: 2019-01-22
CHANGSHA WEITE METALLURGY ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active metal powder produced by the existing rotating electrode induction melting gas atomization equipment is easy to absorb oxygen or other components and deteriorate. These active metal powders are placed in the air for more than 48 hours, and the oxygen content will increase by at least 1000PPM. It may absorb other components in the air, causing the powder to be easily adulterated and deteriorated. Therefore, vacuum packaging is required, and an inert atmosphere is required to protect the powder from being adulterated and deteriorated. Therefore, the powder produced by existing equipment and processes is very difficult to store. and use

Method used

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  • A kind of equipment and process for preparing spherical metal powder

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Comparison scheme
Effect test

Embodiment 1

[0016] The equipment for preparing spherical metal powder in this embodiment includes a rotating electrode feeding device 1, a silo 2, an induction melting chamber 3, an atomizer 4, an atomizing chamber 5, a passivating gas filling device 7, and a cyclone separation device 10 , powder collection device 11, bag dust collection device 12, induced draft fan 13, vacuum system 14 and control system 15, described rotating electrode feeding device 1 is vertically assembled on the silo 2, and the silo 2 is located in the induction melting chamber 3 Above, the atomizer 4 is assembled between the induction melting chamber 3 and the atomization chamber 5, the atomization chamber 5 is connected to the cyclone separation device 10 through a pipeline, and the pipeline between the atomization chamber 5 and the cyclone separation device 10 is provided with passivation The gas filling device 7 is connected to the powder collection device 11 under the cyclone separation device 10, the vacuum sys...

Embodiment 2

[0020] Put the pure titanium rod into the rotary electrode feeding device 1, close the silo 2, and vacuum the silo 2, the induction melting chamber 3 and the atomization chamber 4 to 10 with the vacuum system 14. -1 Pa, the rotating electrode feeding device 1 rotates and vertically feeds the pure titanium rod into the induction melting chamber 3 for melting, and controls the pure titanium rod rotation speed from 1 to 30 rpm through the control system 15, and the vertical feeding speed from 1 to 200mm / min , turn on the atomizer 4 and use argon atomization, control the atomization pressure ≤ 5Mpa, gas flow rate 800Nm³ / H, the atomizer 4 atomizes the molten titanium metal into titanium powder, open the passivation gas filling device 7 to charge Oxygen is fed in, the pressure of oxygen is controlled <0.2Mpa, and the flow rate is 100L / hour. The titanium powder is mixed with the oxygen-argon mixed gas in the cyclone separation device 10 and fully contacted to form a passivation film o...

Embodiment 3

[0022] A valve 6 is set on the pipeline at the bottom of the atomization chamber 4, a feeding bin 9 is set on the pipeline between the passivation gas filling device 7 and the cyclone separation device 10, and the valve 6 is closed, so that the control system 15 can charge the passivation gas The device 7, the gas heating device 8, the feeding bin 9, the cyclone separation device 10, the powder collection device 11, the bag dust collection device 12 and the induced draft fan 13 are controlled separately to form a separate powder passivation device. Add the unpassivated oxygen-containing 1600PPM pure titanium powder into the feeding bin 9, open the passivation gas filling device 7 and fill the mixed gas of oxygen and argon, the volume ratio of oxygen and argon is 3:100, and control the oxygen and argon The pressure of the mixed gas is less than 0.3Mpa, and the flow rate is 500Nm³ / hour. The gas heating device 8 heats the temperature of the mixed gas to 500°C-600°C. The pure titan...

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Abstract

A kind of equipment and process for preparing spherical metal powder, the equipment for preparing spherical metal powder of the present invention, comprises rotating electrode feeding device, silo, induction melting chamber, atomizer, atomization chamber, passivation gas filling device, Cyclone separation device, powder collection device, bag dust collection device, induced draft fan, vacuum system and control system, the rotating electrode feeding device is vertically assembled on the silo, the silo is located above the induction melting chamber, and the atomizer is assembled Between the induction melting chamber and the atomization chamber, the atomization chamber is connected to the cyclone separation device through pipelines, the pipeline between the atomization chamber and the cyclone separation device is equipped with a passivation gas filling device, and the powder collection device is connected under the cyclone separation device . The invention does not need to use a smelting crucible, and the active raw material is heated and melted without contact, atomized into powder, and subjected to surface passivation, and the produced active metal powder is stable in property, not easy to deteriorate, and convenient for storage and use.

Description

technical field [0001] The invention relates to a device and a process for producing spherical metal powder by using rotating electrode induction smelting and inert gas atomization. Background technique [0002] At present, the preparation of spherical metal powder mainly adopts the crucible melting gas atomization technology and the rotating electrode induction melting gas atomization technology. Among them, the crucible smelting gas atomization technology is to smelt metal into molten metal in the crucible, and then break the liquid metal flow into small droplets and solidify into powder with high-speed airflow, but when the crucible smelting gas atomization equipment smelts the material, the material In contact with the crucible, active metals such as titanium cannot be produced. Rotating electrode induction smelting gas atomization technology is to send the alloy bar material into the induction coil vertically for smelting. It does not need crucible smelting, can produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/082B22F2009/0888B22F2009/0844B22F1/065B22F1/145
Inventor 王利民李斌
Owner CHANGSHA WEITE METALLURGY ENG TECH