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Medical tantalum powder and preparation method thereof

A technology of tantalum powder and particle size control, which is applied in the field of tantalum metal powder, can solve the problems of only degraded use, complex tantalum powder particle shape, high oxygen content, etc., and achieve the effect of low production cost, low oxygen content and uniform particle size

Active Publication Date: 2013-02-06
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing process of preparing tantalum metal powder is first to make tantalum particles into powder by traditional ball mill or Raymond mill, and then through the classification process to classify tantalum powder whose particle size meets customer requirements, and the remaining particle size is too large or too large. Small particles can only be downgraded and used; because the produced tantalum powder can only be partially used, the cost is high, and the utilization of the powder is about 30-40% higher, plus labor and equipment depreciation, the cost will also increase 20-30% higher
There is also a fluidized bed jet mill, the prepared tantalum powder has a complex particle shape and high oxygen content

Method used

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  • Medical tantalum powder and preparation method thereof
  • Medical tantalum powder and preparation method thereof
  • Medical tantalum powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of medical tantalum powder, carry out according to the following steps:

[0025] Raw materials: The selected raw materials are hydrogenated tantalum ingots;

[0026] Crushing and grading: The above-mentioned tantalum ingots are crushed into particles of about 2mm by a jaw crusher, and then added to a cyclone crushing and classifying machine, and compressed air is introduced to impact for crushing and grading. The speed of the classifying wheel is controlled to 30KW / h. The gas flow rate is 0.5MPa;

[0027] Impurity removal treatment: the tantalum powder obtained after crushing and classifying by the above-mentioned cyclone crushing and classifying machine is pickled to remove metal and non-metal impurities on the surface; finally, 1wt% metal magnesium is added, and the temperature is kept at 800°C for 3 hours for dehydrogenation, Deoxidation and impurity removal treatment to obtain tantalum metal powder.

[0028] The obtained tantalum metal...

Embodiment 2

[0030] A kind of preparation method of medical tantalum powder, carry out according to the following steps:

[0031] Raw materials: The selected raw materials are hydrogenated tantalum ingots;

[0032] Crushing and grading: The above tantalum ingots are crushed into 3mm particles by a jaw crusher, and then added to a cyclone crushing and classifying machine, and compressed air is introduced to impact for crushing and grading. The flow rate is 0.5MPa;

[0033] Impurity removal treatment: the tantalum powder obtained after crushing and classifying by the above-mentioned cyclone crushing and classifying machine is pickled to remove metal and non-metal impurities on the surface; finally, 1wt% metal magnesium is added, and the temperature is kept at 800°C for 3 hours for dehydrogenation, Deoxidation and impurity removal treatment to obtain tantalum metal powder.

[0034] The obtained tantalum metal powder has an average Fischer particle size of 12.15 μm, a nearly spherical or sph...

Embodiment 3

[0036] Raw materials: The selected raw materials are hydrogenated tantalum ingots;

[0037] Crushing and grading: The above-mentioned tantalum ingots are crushed into particles of about 1.5mm by a jaw crusher, and then added to a cyclone crushing and classifying machine, and compressed air is introduced to impact for crushing and grading. The gas flow rate used is 0.55MPa;

[0038] Impurity removal treatment: the tantalum powder obtained after crushing and classifying by the above-mentioned cyclone crushing and classifying machine is pickled to remove metal and non-metal impurities on the surface; finally, 1wt% metal magnesium is added, and the temperature is kept at 800°C for 3 hours for dehydrogenation, Deoxidation and impurity removal treatment to obtain tantalum metal powder.

[0039] The obtained tantalum metal powder has an average Fischer particle size of 8.15 μm, a nearly spherical or spherical particle shape, an oxygen content of 670 ppm, and a particle size of 95%-9...

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Abstract

Disclosed is medical tantalum powder. The oxygen content of the tantalum powder is smaller than or equal to 1000ppm, the granularity of 95% of the tantalum powder is 1.0-50.0 micrometers, and the particle shape of the tantalum powder is spherical or sphere-like. The preparation method of the medical tantalum powder includes that hydrogenation, breaking, classification and impurity removal, wherein breaking includes that coarse breaking is performed, the particle size of tantalum powder subjected to coarse breaking is controlled below 3mm, then the tantalum powder is delivered into a cyclonic breaking classifier to be broken and classified, the power of a classifying wheel is controlled below 50KW / hour, and the impact gas flow is 0.3-0.8 MPa. The medical tantalum powder is applied to preparation of medical porous tantalum implant materials and has high sintering strength, and prepared porous tantalum is even in pore size, stable in mechanical property, high in purity and good in biocompatibility, accordingly is an ideal material for human skeleton production. The preparation method of the medical tantalum powder is simple, the product percent of pass is high, the rate of finished products can reach 99.0%-99.5%, and the production cost is low. Besides, compared with cost of the current tantalum powder technique, the cost of the medical tantalum powder is reduced by 40-50%.

Description

technical field [0001] The invention relates to a tantalum metal powder, in particular to a tantalum powder material which can be used for preparing human body implants and a preparation method thereof. Background technique [0002] In the field of medical implant materials, tantalum metal powder is sintered and processed into porous tantalum as a medical material for human implantation. At present, the most widely used medical porous tantalum material is produced by a company in the United States through a chemical method. For example, in the US patent US005282861A, chlorine gas and tantalum powder are first reacted to form tantalum chloride, and then hydrogen is introduced for reduction. By controlling the reduction temperature and time, the porous tantalum A layer of dense tantalum powder is formed on the foam material, and finally a medical porous tantalum material with a certain strength is obtained through sintering; another method for making medical human bone materia...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/04A61L27/04
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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