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Production method and production device of tantalum powder

A production device and technology of tantalum powder, which is applied in the field of alkali metal reduction potassium fluorotantalate to produce tantalum powder and sodium reduction reaction device, can solve environmental pollution and other problems, and achieve the effect of reducing production cost and pollution

Active Publication Date: 2010-11-10
江门富祥电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Exhaust gas containing alkali metal vapor is discharged into the air and pollutes the environment
When washing and stirring the product of reducing potassium fluorotantalate with sodium, a large amount of water must be used, and a large amount of alkali-containing wastewater will also pollute the environment

Method used

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  • Production method and production device of tantalum powder
  • Production method and production device of tantalum powder
  • Production method and production device of tantalum powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use as figure 1 In the device shown, the intake pipe 96 of the alkali metal collector is connected to the exhaust port 8 of the reaction vessel 1. Load 160kg of potassium fluorotantalate and 100kg of sodium chloride into reaction vessel 1, evacuate and fill with argon gas, hoist the reaction vessel into electric heating furnace 10, raise the temperature to 900°C, stir, and keep it warm for 1 hour before starting injection Sodium, 49kg of metallic sodium was injected. Continue to stir and keep warm, feed argon from the gas filling port 7 and exhaust from the exhaust port 8 for 20 minutes. Then stop heating and continue to inflate and exhaust. When the temperature in the reaction vessel drops to 800°C, connect the exhaust port of the alkali metal collector to a vacuum pump for evacuation, evacuate for 1 hour, and then cool to room temperature. The solidified product in the reaction vessel was taken out, crushed and washed with water to obtain 70.13 kg of tantalum powder, ...

Embodiment 2

[0038] Use as figure 2 In the device shown, the intake pipe 96 of the alkali metal collector is connected to the exhaust port 8 of the reaction vessel 1. Put 100kg of potassium chloride, 60kg of sodium chloride and 40kg of potassium fluoride into reaction vessel 1, evacuate and fill with argon gas, hoist the reaction vessel into electric furnace 10, heat up to 850°C, stir, and keep it warm for 1 hour. Add 30kg potassium fluorotantalate into reaction vessel 1, start to inject sodium and continue stirring, then divide into 3 times, add 20kg potassium fluorotantalate each time, and start sodium injection after adding potassium fluorotantalate. A total of 90 kg potassium fluorotantalate was added, and 27.6 kg metal sodium was injected. Continue to stir and keep warm, feed argon from the gas filling port 7 and exhaust from the exhaust port 8 for 20 minutes. Then stop heating and continue to inflate and exhaust. When the temperature in the reaction vessel drops to 600°C, connect t...

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Abstract

The invention discloses a production device of tantalum powder, which comprises a reaction vessel and a reaction vessel cover, wherein the reaction vessel cover is hermetically sealed with the reaction vessel; the reaction vessel cover is provided with a plurality of through holes; a thermocouple, a stirring device and a sodium injecting tube are respectively arranged in the through holes; a feed inlet, a gas inlet and an exhaust port are also arranged on the reaction vessel cover; and the production device also comprises an alkali metal collector. The invention also discloses a method for producing the tantalum powder by utilizing the device. The tantalum powder prepared by the method of the invention has low content of oxygen, potassium and sodium, and the alkali metal collector is used for collecting the discharged alkali metal vapor, thereby reducing the pollution on the atmosphere, recycling alkali metals and reducing the production cost.

Description

Technical field [0001] The invention relates to a production method and device for tantalum powder, in particular to a method for producing tantalum powder by reducing potassium fluorotantalate with alkali metals and a sodium reduction reaction device with an alkali metal collector. Background technique [0002] Metal tantalum powder, the dense oxide film formed on the surface of the powder has the properties of one-way conductive valve metal. The prepared anode film has stable chemical properties (especially stable in acid electrolyte), high resistivity (7.5×1010Ω·cm), large dielectric constant (27.6), and low leakage current. It also has the advantages of wide operating temperature range (-80~200℃), high reliability, shock resistance and long service life. [0003] Alkali metal reduction of potassium fluorotantalate is an important method for preparing tantalum powder, especially the main method for preparing high specific volume tantalum powder. Since Helier Martin invented th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22
Inventor 朱德忠郑浩宇廖志刚何文礼
Owner 江门富祥电子材料有限公司
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