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
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[0029] Example 1
[0030] Oxygen-acetylene 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℃.
[0031] Sandblasting the carbon anode substrate, compressed air pressure 0.5㎏ / cm 2 , The surface roughness after sandblasting reaches Sa2.5 level.
[0032] The metal copper coating is sprayed on the carbon anode substrate, and the metal copper coating is sprayed on the carbon anode substrate with a flame spray gun. The material is sprayed copper wire. The flame center line of the spray gun intersects the workpiece axis perpendicularly, and the spray distance is 200mm; parameter control O 2 : 15SCFM, C 3 H 6 :200SCFH; The temperature of the workpiece is controlled at 150℃ during the spraying process, and the coating thickness is 0.5mm.
[0033] The sprayed carbon anode substrate is ground and polished, and the ground surface roughness reaches Ra0.5μm, which is the finished product.
Example Embodiment
[0034] Example 2
[0035] Oxygen-acetylene 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℃.
[0036] Sandblasting the carbon anode substrate, the compressed air pressure is 0.6㎏ / cm 2 , The surface roughness after sandblasting reaches Sa2.5 level.
[0037] The metal copper coating is sprayed on the carbon anode substrate, and the metal copper coating is sprayed on the carbon anode substrate with a flame spray gun. The material is sprayed copper wire. The flame center line of the spray gun intersects the workpiece axis perpendicularly, and the spray distance is 225mm; parameter control O 2 : 16SCFM, C 3 H 6 :220SCFH; The temperature of the workpiece is controlled at 180℃ during the spraying process, and the coating thickness is 0.7mm.
[0038] The sprayed carbon anode substrate is ground and polished, and the ground surface roughness reaches Ra0.8μm, which is the finished product.
Example Embodiment
[0039] Example 3
[0040] Use flame baking to purify the surface of the carbon anode substrate for fluorine production, and flame bake the carbon anode substrate with an oxygen-acetylene flame gun. The surface temperature of the workpiece is 200℃;
[0041] Sandblasting the carbon anode substrate, compressed air pressure 0.7㎏ / cm 2 , The surface roughness after sandblasting reaches Sa2.5 level;
[0042] The metal copper coating is sprayed on the carbon anode substrate, and the metal copper coating is sprayed on the carbon anode substrate with a flame spray gun. The material is copper powder; the flame center line of the spray gun intersects the workpiece axis perpendicularly, and the spray distance is 250mm; parameter control O 2 : 18SCFM, C 3 H 6 :240SCFH; The temperature of the workpiece is controlled at 200℃ during the spraying process, and the coating thickness is 0.9mm.
[0043] The sprayed carbon anode substrate is ground and polished, and the ground surface roughness reaches Ra1.0...
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