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Reaction device for reducing potassium fluotantalate by sodium and method for manufacturing tantalum powder by reaction device

A technology of potassium fluorotantalate and tantalum powder is applied in the field of production equipment of tantalum powder, which can solve the problems of environmental pollution, inconvenient opening and closing of valves, large heat capacity, etc. Effect

Active Publication Date: 2015-07-29
江门富祥电子材料有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0010] Moreover, the exhaust gas containing alkali metal vapor is discharged into the air and pollutes the environment
When washing the product of potassium fluorotantalate reduced by strong alkaline sodium, a large amount of water should be used, and a large amount of alkali-containing wastewater will also pollute the environment
[0011] CN101879603 discloses a method for producing fine particle tantalum powder by reducing potassium fluorotantalate with sodium. This method can achieve the purpose of reducing the potassium and sodium content of tantalum powder. However, due to the evacuation of the reaction vessel after sodium reduction at high temperature, high-temperature sodium vapor A large amount of sodium vapor is flushed out under sudden decompression. Due to the high temperature and large heat capacity of the sodium vapor, a large amount of heat is brought out to make the pipes and valves red and hot. The valves are inconvenient to open and close, and sometimes blockage and sodium vapor leakage occur. question

Method used

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  • Reaction device for reducing potassium fluotantalate by sodium and method for manufacturing tantalum powder by reaction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] use as figure 1 In the shown device, 200kg of potassium fluorotantalate and 150kg of sodium chloride are put into the sodium reduction reaction vessel 3-0, and argon gas is filled from the intake pipe 4 after being evacuated from the exhaust pipe 7-2, and the exhaust gas is opened. The valve of the pipe 7-2 is used for circulation, and the air flow rate is 0.1-10 liters / powder. The material 12 in the reaction vessel 3 is heated up to 960° C. with the resistance heater 2, and the stirring paddle 10 is started. 5 injections of sodium, and a total of 60.92kg of metallic sodium were injected to complete the reaction. Let the coolant enter from the inlet 61, pass through the channel 63, and discharge from the outlet 62; close the valve of the exhaust pipe 72, open the valve of the exhaust pipe 71, keep the pressure in the reaction vessel at about 0.1-0.105MPa, and the flow rate of the exhaust gas 0.1-5 liters / minute, continue to stir for 10 minutes, and keep warm at 960°C f...

Embodiment 2

[0062] use as figure 1 In the shown device, 160kg of potassium fluorotantalate, 100kg of sodium chloride and 60kg of potassium chloride and a small amount of oxygen-containing compound grain refiner dissolved in alkali metal halide salt are packed into the sodium reduction reaction vessel 3, After being evacuated from the exhaust pipe 72, fill the argon gas from the intake pipe 4, open the valve of the exhaust pipe 72 to circulate, the gas flow rate is 0.1 liters / minute-10 liters / minute, and the reaction vessel 3-0 is heated by a resistance heater 2 Inner material 12 is warmed up to 900 ℃, makes stirring paddle 10 stir, starts to inject sodium from sodium injection pipe 5 after being kept warm for 1 hour, injects 48.7kg liquid metal sodium altogether, completes reaction. Make the coolant circulate in the cooler 6-0, close the valve of the exhaust pipe 7-2, open the valve of the exhaust pipe 7-1, keep the pressure in the reaction vessel at about 0.1-0.105MPa, and the flow rate ...

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Abstract

The invention discloses a device for reducing potassium fluotantalate by sodium. The device comprises a reaction container and a reaction container cover which is in matched sealing with the reaction container; a sodium collecting device is arranged below the reaction container cover; a cooler is arranged at the position, corresponding to the sodium collecting device, on the reaction container cover. The invention further discloses a method for producing tantalum powder by using the device. The device and the method disclosed by the invention are safe and reliable; the tantalum powder produced by reducing the potassium fluotantalate by the sodium is low in impurity content.

Description

technical field [0001] The invention relates to a production device of tantalum powder, in particular to a reaction device for reducing potassium fluorotantalate by sodium with a sodium collector and a method for producing tantalum powder by using the device. Background technique [0002] Metal tantalum has high melting point, low vapor pressure, good cold working performance, high chemical stability, strong resistance to liquid metal and acid and alkali corrosion, and high dielectric constant value of surface oxide film. Metal tantalum and its alloys are important functional materials. It has important uses in industrial sectors such as electronics, integrated circuits, steel, metallurgy, chemicals, hard alloys, atomic energy, and aerospace, as well as in technical fields such as strategic weapons and medical equipment. High purity is required in tantalum applications, especially for electrolytic capacitors and sputtering tantalum targets. [0003] The production of tantal...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 郑祥云朱德忠郑浩宇
Owner 江门富祥电子材料有限公司
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