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A kind of production method of superfine zirconium powder

A production method and technology of zirconium powder, which is applied in the field of production of ultrafine zirconium powder, can solve problems such as being unable to meet the application requirements of ultrafine zirconium powder, avoid spontaneous combustion and explosion, meet technical indicators and application requirements, and prevent vacuum too high effect

Active Publication Date: 2016-07-06
CITIC JINZHOU METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, zirconium powder with fine particle size mainly includes zirconium powder for thermal batteries, which is used as heating material for thermal batteries of weapons such as rockets and missiles. <6μm accounts for 30% to 40%, and its particle size is coarser than ultrafine zirconium powder, which cannot meet the application requirements of ultrafine zirconium powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] （1） Put 10kg zirconium sponge (the total zirconium content is greater than 99.4%) and 2kg electrolytic zirconium powder (the total zirconium content is greater than 99%) into the crucible of the hydrogenation reactor (the charging amount accounts for 2 / 3 of the total volume of the crucible), Pump high vacuum, when the vacuum degree is less than or equal to 10Pa, close the valve of the vacuum system, pass in high-purity hydrogen, energize the resistance wire, control the current to 10A, heat the mixture of sponge zirconium and electrolytic zirconium to 300°C, and stop the power supply. Hold the heat for 2.5 hours to hydrogenate the raw material zirconium, and keep the hydrogenation reactor at normal pressure during the whole hydrogenation process to obtain zirconium hydride;

[0021] (2) Put 4.0kg of zirconium hydride into a ball mill tank with 4.2kg of agate balls. The model of the ball mill tank is Φ247mm×355mm, and the inner substrate is zirconium lining. Fill the bal...

Embodiment 2

[0026] (1) Put 8kg zirconium sponge (total zirconium content greater than 99.4%) and 2kg electrolytic zirconium powder (total zirconium content greater than 99%) into the crucible of the hydrogenation reactor (feeding amount accounts for 2 / of the total volume of the crucible 3), draw a high vacuum, when the vacuum degree is less than or equal to 10Pa, close the valve of the vacuum system, pass in high-purity hydrogen, energize the resistance wire, control the current to 20A, heat the mixture of sponge zirconium and electrolytic zirconium to 400°C, Stop energizing, keep warm for 2 hours to hydrogenate the raw material zirconium, keep the hydrogenation reactor at normal pressure during the whole hydrogenation process, and obtain zirconium hydride;

[0027] (2) Put 5.5kg of zirconium hydride into a ball mill tank with 5.0kg of agate balls. The model of the ball mill tank is Φ247mm×355mm, and the inner substrate is zirconium lining. Fill the ball mill tank with deionized water to ...

Embodiment 3

[0032] (1) Put 12kg zirconium sponge (total zirconium content is greater than 99.4%) and 4kg electrolytic zirconium powder (total zirconium content is greater than 99%) into the crucible of the hydrogenation reactor (feeding amount accounts for 2 / of the total volume of the crucible 3) Draw a high vacuum. When the vacuum degree is less than or equal to 10Pa, close the valve of the vacuum system, feed high-purity hydrogen, electrify the resistance wire, and control the current to 15A, and heat it to 360°C to ignite the mixture of zirconium sponge and electrolytic zirconium. Stop energizing, keep warm for 2.2 hours to hydrogenate the raw material zirconium, keep the hydrogenation reactor at normal pressure during the whole hydrogenation process, and obtain zirconium hydride;

[0033] (2) Put 5.0kg of zirconium hydride into a ball mill tank with 4.5kg of agate balls. The model of the ball mill tank is Φ247mm×355mm, and the inner substrate is zirconium lining. Fill the ball mill ta...

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Abstract

A production method of ultra-fine zirconium powder, which uses firearm sponge zirconium and electrolytic zirconium as raw material zirconium to mix ingredients and add it to the crucible of a hydrogenation reactor, ignite the raw material zirconium and then hydrogenate it to obtain zirconium hydride; Put the zirconium into a ball mill tank equipped with ball milling media, and perform ball milling to make the particle size of zirconium hydride ≤ 400 mesh; put the crushed zirconium hydride into a vacuum oven for drying, put it into a dehydrogenation furnace for dehydrogenation, and then put it into a After ball milling in the ball milling tank of the ball milling medium, it is screened, washed and dried to obtain ultrafine zirconium powder. The method has the advantages that the raw materials are easy to obtain, the technological process is stable, spontaneous combustion and explosion phenomena are avoided, and the technical index and safety production requirements of the superfine zirconium powder can be met.

Description

technical field [0001] The invention relates to a production method of ultrafine zirconium powder. Background technique [0002] Zirconium powder has excellent gas absorption performance and is widely used in ammunition, fireworks and electric vacuum fields. The ultra-fine zirconium powder can greatly improve the burning speed and detonation sensitivity, and the ignition diffusion spreads quickly, which is stable and reliable. The ultra-fine zirconium powder with active zirconium content > 90% and particle size ≤ 10 μm, accounting for 70%, can be used as an ignition agent for nuclear power source pyrotechnics. [0003] Because zirconium powder has a large specific surface and specific surface energy, it reacts rapidly with oxygen. When the average particle size of zirconium powder is ≤10μm and it is suspended, it will spontaneously ignite and explode. Therefore, at present, zirconium powder with fine particle size mainly includes zirconium powder for thermal batteries, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/00
Inventor 齐牧崔传海李广明刘飞李杰孙秀焕王敏张绪东
Owner CITIC JINZHOU METAL
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