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Thermal spraying processing method for carbon anode used for preparing fluorine

A processing method, carbon anode technology, applied in electrodes, coatings, melting spray plating, etc., can solve problems such as increased resistance, poor contact, and reduction of anodes, achieving reduced contact resistance, excellent electrical conductivity, and improved flatness Effect

Inactive Publication Date: 2012-02-01
HUAHE NEW TECH DEV COMPANY RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the surface of the carbon anode material is uneven and there are pores inside, in the electrolytic production, the connection between the carbon anode and the copper part is poor, and the electrolyte penetrates, causing the local resistance to increase, the electrode to heat up, and the carbon anode to break
Not only will the number of anodes be reduced, the output of fluorine gas will be reduced, but the energy consumption of the electrolytic cell will be increased, which will directly affect the production efficiency and economic benefits of electrolytic fluorine production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Oxygen-acetylene flame flame baking is used to purify the surface of the carbon anode substrate for fluorine production, and the surface temperature of the workpiece is 100°C.

[0031] Sandblasting the carbon anode base, compressed air pressure 0.5㎏ / cm 2 , the surface roughness after blasting reaches Sa2.5 level.

[0032] Spray the metal copper coating on the carbon anode substrate, use a flame spray gun to spray the metal copper coating on the carbon anode substrate, the material is sprayed copper wire, the flame center line of the spray gun is perpendicular to the workpiece axis, and the spray distance is 200mm; parameter control O 2 : 15SCFM, C 3 h 6 : 200SCFH; during the spraying process, the workpiece temperature is controlled at 150°C, and the coating thickness is 0.5mm.

[0033] Grinding and polishing the sprayed carbon anode substrate, the surface roughness of the grinding reaches Ra0.5μm, which is the finished product.

Embodiment 2

[0035] Oxygen-acetylene flame flame baking is used to purify the surface of the carbon anode substrate for fluorine production, and the surface temperature of the workpiece is 150°C.

[0036] Sandblasting the carbon anode substrate, the compressed air pressure is 0.6㎏ / cm 2 , the surface roughness after blasting reaches Sa2.5 level.

[0037] Spray the metal copper coating on the carbon anode substrate, use a flame spray gun to spray the metal copper coating on the carbon anode substrate, the material is sprayed copper wire, the flame center line of the spray gun intersects the axis of the workpiece perpendicularly, and the spray distance is 225mm; parameter control O 2 : 16SCFM, C 3 h 6 : 220SCFH; during the spraying process, the workpiece temperature is controlled at 180°C, and the coating thickness is 0.7mm.

[0038] Grinding and polishing the sprayed carbon anode substrate, the surface roughness of the grinding reaches Ra0.8μm, which is the finished product.

Embodiment 3

[0040] Use flame baking to purify the surface of the carbon anode substrate for fluorine production, and use an oxygen-acetylene flame gun to flame bake the carbon anode substrate, and the surface temperature of the workpiece is 200 °C;

[0041] Sand blast the carbon anode substrate, compressed air pressure 0.7㎏ / cm 2 , the surface roughness after blasting reaches Sa2.5 level;

[0042] Spray metal copper coating on the carbon anode substrate, use a flame spray gun to spray metal copper coating on the carbon anode substrate, the material is copper powder; the flame center line of the spray gun is perpendicular to the axis of the workpiece, and the spray distance is 250mm; parameter control O 2 : 18SCFM, C 3 h 6 : 240SCFH; during the spraying process, the workpiece temperature is controlled at 200°C, and the coating thickness is 0.9mm.

[0043] Grinding and polishing the sprayed carbon anode substrate, the surface roughness of the grinding reaches Ra1.0μm, which is the finishe...

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PUM

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Abstract

The invention discloses a thermal spraying processing method for a carbon anode used for preparing fluorine, which comprises the following steps of: (i) carrying out flame baking and abrasive blasting for a carbon anode matrix by an oxygen-acetylene flamer, and purifying a carbon anode matrix surface; (ii) spraying a metal copper coating to the carbon anode matrix by the flamer; and (iii) grinding and polishing the sprayed carbon anode matrix to obtain a finished product. The thermal spraying processing method is convenient to operate, the evenness and the fineness of the carbon anode surface are improved by the coating, the carbon anode and a copper clamp plate have good contact, contact resistance is reduced, the carbon anode has excellent conductivity and can resist fluoride and hydrogen fluoride corrosion, and the service life of the carbon anode is prolonged.

Description

technical field [0001] The invention belongs to a method for coating a metal coating material on a carbon anode for fluorine production, in particular to a method for surface treatment of a carbon anode for fluorine production by flame thermal spraying. Background technique [0002] Fluorine is the most active element discovered by humans so far. Due to its strong chemical reactivity, there is almost no high concentration of elemental fluorine in the atmosphere. Fluorine can have a strong exothermic reaction with almost all metals or non-metals, and can oxidize all organic substances, causing them to burn or even explode violently. Therefore, the use and handling of fluorine or fluorine-containing gases is very dangerous. At the same time, fluorine is an element with a wide range of uses. Fluorine is used in oxidants in rocket fuel, separation of uranium isotopes, semiconductor fluorine laser etching, high-power fluorine laser cutting and welding, excimer laser beauty and m...

Claims

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Application Information

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IPC IPC(8): C23C4/06C04B41/88C25B11/00C25B11/12C25B1/24C23C4/08C23C4/129
Inventor 贺邓崔学文刘永生仝庆
Owner HUAHE NEW TECH DEV COMPANY RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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