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Conductive anti-oxygenation paint and grahpite electrode

An anti-oxidation coating, conductive technology, applied in the fields of conductive anti-oxidation coatings, conductive anti-oxidation coatings and graphite electrodes, can solve the interruption of continuity of glassy coating film, loss of glassy coating film, viscosity of glassy coating film Lowering and other issues

Inactive Publication Date: 2006-04-05
MIKUNI SHIKISO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, in the above-mentioned paint, the coating film components are melted by heat at about 800°C to form a glass-like coating film, thereby exerting an anti-oxidation effect, but at a high temperature above 1000°C, the viscosity of the glass-like coating film decreases, and the glass-like coating film Coating film peeling, interruption of continuity of glassy coating film
As a result, the barrier of oxygen is lost, and there is a disadvantage of causing hot perforation of electrodes such as shrinkage cavities.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～4

[0075] First, according to the compounding compositions (a) and (b) described in the following Tables 1 and 2, they were dispersed using a sand mill for 60 minutes to obtain 10 types of paints (a) and (b) as a set. The carbon black, colloidal silica and dispersant used are shown in Table 3.

Embodiment 6～10 and comparative example 5～8

[0093] First, according to the compounding compositions (a) and (b) described in the following Tables 5 and 6, they were dispersed using a sand mill for 60 minutes to obtain 10 types of paints (a) and (b) as a set. The carbon black, colloidal silica and dispersant used are shown in Table 7.

Embodiment 11 and comparative example 9

[0110] First, according to the compounding compositions (a) and (b) described in the following Table 9, they were dispersed using a sand mill for 60 minutes to obtain two kinds of paints (a) and (b) as a set. As the carbon black used, "#4000B" manufactured by Mitsubishi Chemical Co., Ltd. was used, and as colloidal silica, "Faiso Kataroid USBB-120" (solid content: 20% by weight) manufactured by Catalyst Chemical Industry Co., Ltd. was used. As a dispersant, "Demol N" manufactured by Kao Co., Ltd. was used, and as SiC, "Day Chuck CF-120F" manufactured by Yakushima Denko Co., Ltd. was used. This SiC is a product with a purity of 95%, and contains a total of 5% by weight of metal aluminum and simple silicon as impurities.

[0111] (a), (b) The ratio of the solid content in each paint is, (a) is 67.1% by weight, (b) is 62.2% by weight, and the content of the simple substance of aluminum and silicon relative to the solid content, (a) is 1.48% by weight %, (b) is 1.33% by weight. ...

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PUM

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Abstract

The present invention relates to a conductive anti-oxidation coating which can be used as anti-oxidation material of graphite electrode in electric arc furnace of steel-smelting furnace and its graphite electrode coated with said coating material.

Description

technical field [0001] The present invention relates to a conductive anti-oxidation coating and a graphite electrode, in particular, to a conductive anti-oxidation coating that can be used as an anti-oxidation material for a graphite electrode in an electric arc furnace such as an electric steelmaking furnace and to apply the anti-oxidation coating. Graphite electrodes made of coatings. Background technique [0002] So far, artificial graphite electrodes have been used in electric arc furnaces including electric steelmaking furnaces. Such graphite electrodes are used under very severe conditions affected by large currents, high temperatures, scattering of melt, and the like. In particular, an ultra-high-temperature arc occurs at the tip of the electrode, which means that the electrode is exposed to a high temperature of about 400-3000°C, and is easily oxidized and consumed by the oxidizing gas entering from the opening in the furnace. [0003] In the steelmaking furnace, t...

Claims

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Application Information

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IPC IPC(8): C09D5/24H05B7/06
Inventor 久英之川端一诚福岛达郎
Owner MIKUNI SHIKISO