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Graphite electrode with nano graphene for enhancing anti-oxidizing effect

A nano-graphene and graphite electrode technology, applied in the field of nano-graphene-enhanced anti-oxidation graphite electrodes and graphite electrodes, can solve problems such as structural instability and easy oxidation, achieve structural stability, enhance anti-oxidation performance, and comprehensively resist Outstanding oxidative properties

Inactive Publication Date: 2018-12-18
SICHUAN LIZHI JIUCHUANG INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the graphite electrode in the prior art is easy to oxidize during use, resulting in structural instability, and there is a problem that the fracture falls into the smelting alloy liquid, and provides a graphite electrode with enhanced oxidation resistance of nano-graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A graphite electrode with enhanced oxidation resistance by nano-graphene, comprising a graphite electrode base, coated with an anti-oxidation layer on the surface of the base, the anti-oxidation layer comprising the following components in weight percentage: 5% graphene, 10% silicon carbide, kaolin 45%, titanium dioxide 15%, calcium oxide 25%.

Embodiment 2

[0029] A graphite electrode with enhanced oxidation resistance by nano-graphene, comprising a graphite electrode substrate, wrapped with an anti-oxidation layer on the surface of the substrate, the thickness of the anti-oxidation layer is 20 μm, and the anti-oxidation layer contains the following components in weight percentage: graphene 6% , silicon carbide 10%, kaolin 49%, titanium dioxide 15%, calcium oxide 20%.

[0030] The preparation method is as follows:

[0031] (1) Graphene, silicon carbide, kaolin, titanium dioxide, and calcium oxide were ball-milled for 24 hours, using ethanol as the ball-milling medium, and the ball-to-material ratio was 5:1.

[0032] (2) After the ball milling is completed, the feed liquid is poured out, the balls are washed with ethanol, the combined feed liquid is formulated into a slurry with a solid content of 25%, and the slurry is coated on the surface of a graphite electrode, dried at 500° C. for 40 min to obtain Graphite electrodes with e...

Embodiment 3

[0034] A graphite electrode with enhanced oxidation resistance by nano-graphene, comprising a graphite electrode substrate, wrapped with an anti-oxidation layer on the surface of the substrate, the thickness of the anti-oxidation layer is 10 μm, and the anti-oxidation layer contains the following components in weight percentage: graphene 3% , silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.

[0035] The preparation method is as follows:

[0036] (1) Graphene, silicon carbide, kaolin, titanium dioxide, and calcium oxide were ball-milled for 18 hours, using ethanol as the ball-milling medium, and the ball-to-material ratio was 3:1.

[0037] (2) After the ball milling is completed, the feed liquid is poured out, the balls are washed with ethanol, the combined feed liquid is formulated into a slurry with a solid content of 25%, and the slurry is coated on the surface of a graphite electrode, and dried at 500° C. for 30 min to obtain Graphite electrodes wit...

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Abstract

The invention discloses a graphite electrode with nano graphene for enhancing anti-oxidizing effect, which includes: a graphite electrode base coated with an anti-oxidizing layer. The anti-oxidizing layer includes, by weight, 2-6% of graphene, 5-10% of SiC, 40-50% of kaolin, 10-20% of TiO2 and 20-30% of CaO. On the surface of the graphite electrode base, the surface anti-oxidizing layer is formedby supporting the graphene, SiC, TiO2 and CaO on the kaolin, so that at high temperature, oxidization failure on the graphite electrode due to air is alleviated and oxidizing weight loss of the graphite electrode is reduced, thus improving stability.

Description

technical field [0001] The invention relates to a graphite electrode, in particular to a graphite electrode with enhanced oxidation resistance by nano-graphene, which belongs to the technical field of new materials. Background technique [0002] Graphite electrode refers to petroleum coke, pitch coke as aggregate, coal tar pitch as binder, a kind of resistant electrode made by calcination of raw materials, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. High-temperature graphite conductive materials are called artificial graphite electrodes (referred to as graphite electrodes) to distinguish them from natural graphite electrodes prepared from natural graphite. [0003] Graphite electrodes are used to smelt various alloy steels. The disadvantage is that they have poor high-temperature oxidation resistance. In the high-temperature environment of smelting furnaces, graphite electrodes are very easy to oxidize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
CPCC04B41/5059C04B41/009C04B41/85C04B41/5037C04B41/5027C04B35/522
Inventor 张慧张羽
Owner SICHUAN LIZHI JIUCHUANG INTPROP OPERATION CO LTD
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