Method of impregnating graphite electrode by using vinylit resin

A technology of vinyl resin and graphite electrodes, applied in the direction of carbon-silicon compound conductors, etc., can solve the problems of high cost and difficult penetration, and achieve the effect of low cost, good corrosion resistance and solution of penetration problems

Inactive Publication Date: 2009-11-04
殷志军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above impregnating agents cannot solve the corrosion problem of nitric acid and hydrofluoric acid mixed acid very well, and also have the disadvantages of high cost and difficulty in solving the penetration problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Graphite electrodes are domestically produced, with an opening porosity of 17-18%, a density of 1.58g / cm3, a compressive strength of 19.9Ppa, a tensile strength of 2.6Mpa, and a bending strength of 7.6Mpa. They are placed on a wound bed and processed into 230×120× 65mm rectangular brick shapes and dried. Choose BRT2002 vinyl resin with less than 5% R-type modifier. The impregnation container is a vertical impregnation kettle with a diameter of 600mm and a height of 1m. There is a lifting frame inside, on which graphite electrode products are placed, a resin discharge pipe is provided, a discharge pipe is provided at the bottom of the kettle, and a compressed air pipe, vacuum pipe and Empty tube. The size of the polymerization kettle is the same as that of the impregnation kettle. It has a built-in hoisting impregnation basket, a compressed air pipe, an emptying pipe, and an electric heating device on the outer wall. The temperature can be adjusted from normal temperatu...

Embodiment 2

[0020] The method steps are the same as in Example 1, except that 65 graphite bricks are impregnated once.

Embodiment 3

[0022] The method steps are the same as in Example 1, except that 80 graphite bricks are impregnated at one time.

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Abstract

The invention relates to a graphite electrode, in particular to a method of impregnating the graphite electrode by using vinylit resin, which comprises the following steps: finished graphite electrode product is placed into an impregnation container and then is sealed, the first vacuumizing is performed, the vinylit resin is sucked from a pipe at one side of the impregnation container to impregnate the working surface of the graphite electrode, the second vacuumizing is performed, the first pressurizing is performed, the third vacuumizing is performed, the second pressurizing is performed, a valve of a pressure meter is opened for relieving pressure, an impregnation basket is gripped, the impregnated graphite electrode is taken out, the resin on the surface of the impregnated graphite electrode is removed by using solvent, and the graphite electrode is placed at normal temperature until no liquid flows down on the surface for polymerizing. Air in the clearance of the graphite electrode treated by the method is thoroughly discharged so that the resin is fully impregnated into the inner walls of fine holes of graphite and the inner walls of the fine holes of the graphite are filled with the resin, the polymerization is complete, the surface of the graphite has no phenomenon of bubble flowing, and no overflowing and scaring, and is not easy to oxidize to cause the shedding, therefore, the graphite has good corrosion resistance and long service life. The method has low cost, and better solves the penetration problem.

Description

technical field [0001] The invention relates to a graphite electrode, in particular to a method for impregnating a graphite electrode with a vinyl resin. Background technique [0002] At present, domestic graphite impregnating agents are successfully used in heat exchange equipment in production, such as phenolic resin, furan resin, epoxy master or fluororesin impregnating agents, and graphite brick materials are impregnated with perhydrated glass and asphalt. Chinese patent 200410010023.7 published on December 29, 2004 discloses an impregnation treatment method for graphite electrodes, which uses aluminum dihydrogen phosphate liquid or Rutafin F-type resin liquid as an impregnating agent. The above impregnating agents cannot well solve the corrosion problem of nitric acid and hydrofluoric acid mixed acid, and also have the disadvantages of high cost and difficulty in solving the penetration problem. [0003] Vinyl resin is made by polyaddition reaction of bisphenol A epoxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/04C04B41/48
Inventor 殷志军
Owner 殷志军
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