Preparation method of superfine spherical zirconium powder capable of realizing size grading

A particle size classification and zirconium powder technology, applied in the field of metal powder materials, can solve the problems of difficulty in controlling and classifying the particle size of zirconium powder, limiting the large-scale application of zirconium powder, and long process flow in the preparation process, so as to avoid clumping and reduce particle size. , the effect of improving safety

Inactive Publication Date: 2022-01-11
江苏智仁景行新材料研究院有限公司
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  • Application Information

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Problems solved by technology

However, the zirconium powder prepared by the hydrodehydrogenation method is irregular, and the particle size of the zirconium powder is difficult to control and classify. The preparation process is long, and the particles are mainly broken and refined by ball milling. The high oxygen content in the zirconium powder leads to the loss of active zirconium.
Spherical zirconium powder can be prepared by methods such as crucible-free atomization, and the purity of zirconium powder is high, but the preparation cost is high and the yield is low, which limits the large-scale application of zirconium powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Sponge zirconium was delivered to the pipe using high temperature hydrogen, and the hydrogen temperature in the conduit was 520 ° C and uniformly distributed, and the hydrogenated zirconium powder was broken. The ball mass ratio was 6: 1, and the ball milling for 3 h was obtained. Spherical hydrogenated zirconium powder, using 1200 ° C plasma heating to hydrogenated zirconium powder, the plasma power is 30 kW, the powder distribution rate is 3 kg / h, and the spherical zirconium powder is carried out using 460 ° C argon powder. The secondary dehydrogenation is subjected to passivation treatment using phosphate, ethyl acetate, and trifluoroacetic acid mixed solution, the obtained zirconium powder sphere is 94.6%, the active zirconium content is 96.1%, and the zirconium powder incidence of 40 μm or less is 63.8%.

Embodiment 2

[0046] Sponge zirconium was delivered to the pipe using high temperature hydrogen, and the hydrogen temperature of the pipe inlet was 450 ° C. The hydrogen temperature at the exit was 640 ° C, and the hydrogenated zirconium powder was broken, and the mass ratio of the ball was 15: 1, continuous ball milling 8h, obtained Sliced ​​zirconium powder, using 1460 ° C plasma to heat zirconium powder heating for dehydrogenation and sphericalization, plasma power is 50 kW, powder distribution rate of 2.4 kg / h, using 460 ° C argon powder to gently The secondary dehydrogenation is performed, and the passivation treatment of phosphate, ethyl acetate, trifluoroacetic acid mixed solution is used, and the obtained zirconium powder is 92.2%, and the active zirconium content is 96.8%, 40 μm or less zirconium powder. The rate is 53.7%.

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PUM

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Abstract

The invention discloses a preparation method of superfine spherical zirconium powder capable of realizing size grading. Based on a hydrogenation dehydrogenation principle, zirconium hydride powder is firstly prepared, temperature-controllable plasma is adopted to heat the zirconium hydride powder for dehydrogenation, the zirconium powder is crushed under the action of gas explosion, and meanwhile, the crushed zirconium powder is subjected to plasma spheroidizing treatment to prepare the spherical zirconium powder. The zirconium powder subjected to plasma dehydrogenation spheroidization is further dehydrogenated under the protection of high-temperature inert gas, the zirconium powder is graded by using the inert gas, and the graded zirconium powder is directly conveyed into a reaction container filled with a passivation reagent for in-situ passivation treatment, so that the passivated spherical zirconium powder with different particle sizes is obtained. The technical problems that the zirconium powder prepared by a hydrogenation dehydrogenation method is irregular in morphology, coarse in particle size, difficult to classify, easy to oxidize, long in technological process and the like are solved, and the preparation cost of the zirconium powder can be reduced.

Description

Technical field [0001] The present invention belongs to the field of metal powder material, and more particularly to a preparation method of ultrafine spherical zirconium powder capable of achieving particle size fractionation. Background technique [0002] The zirconium powder has a large density, high activity, high volume, and a small amount of heat capacity. It is more fun to combust to aluminum powder, and the use of zirconium powder in the propellant has the following advantages: (1) density ratio; 2) The ignition performance is good, which is conducive to increasing the combustion rate; (3) The two-phase flow loss is small; (4) Effective inhibition of unstable combustion. In addition, zirconium powder is high, the energy is large, and the energy is large, can be rapidly consuming and rapidly warming, significantly improves weapon killing. However, the current zirconium powder has high cost, and the preparative zirconium powder is irregular such that zirconium powder is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02B22F1/065
CPCB22F9/023
Inventor 董世新王祥王贵宗郜俊震刘林林
Owner 江苏智仁景行新材料研究院有限公司
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