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Preparation method of enhanced type composite graphite electrode

A technology of composite graphite and production method, applied in electric heating devices, electrical components, heating by discharge and other directions, can solve the problems of furnace failure, product quality decline, easy occurrence of cracks, etc., to simplify the process, improve the compressive strength, The effect of reducing the cost of graphitization

Active Publication Date: 2015-08-12
河北顺天电极有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The self-baking electrode is made by putting the electrode paste into the electrode shell welded with ordinary steel plates on the upper part of the submerged arc furnace, and using the Joule heat of the current passing through the electrode itself and the radiant heat of the electric furnace to melt and roast the electrode paste. Under the pressure of the paste column, the conductive electrode carbon block with a certain strength and shape has been slowly roasted in the smelting process. Because it is used, formed and roasted at the same time, the forming and roasting processes are omitted. The production process is simple and the cost is low. Relatively low, only 0.3-0.5 yuan per ton, but its disadvantage is that the electrode shell is also integrated into the submerged arc furnace during the production process, resulting in a high iron content in the product, which is not suitable for smelting products that strictly control the content of iron impurities. product
[0004] CN02230874.1 discloses a graphite self-baking electrode shell, which is used to solve the technical problems that the iron impurities in the product increase and the product quality declines. However, if the electrode shell is made of traditional graphite material, it is easily affected by the expansion pressure and thermal stress of the electrode paste. Cracks occur, leading to furnace drop accidents

Method used

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  • Preparation method of enhanced type composite graphite electrode
  • Preparation method of enhanced type composite graphite electrode

Examples

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Effect test

Embodiment 1

[0043] Example 1 Manufacturing method of enhanced composite graphite electrode shell

[0044] A method for making an enhanced composite graphite electrode shell is as follows:

[0045] Select the following components by weight percentage: 0.075-0.15mm calcined petroleum coke powder 23%,

[0046] 0.5~15mm carbon fiber 5%, 0.5~4mm calcined petroleum coke 25%, 4~10mm calcined petroleum coke 14%, 10~16mm calcined petroleum coke 13%, medium temperature coal tar pitch 20%, the above raw material components are kneaded, After forming, roasting, and graphitization, mechanical processing is carried out to form an electrode shell 1 with internal threads 2 and external threads 3 at both ends. The diameter of the inner cavity of the electrode shell is 600 mm, and the thickness of the graphite electrode shell is 300 mm.

Embodiment 2

[0047] Example 2 Method of using enhanced composite graphite electrode shell (preparation method of enhanced composite graphite electrode)

[0048] When in use, 10 reinforced composite graphite electrode shells obtained in Example 1 are connected into cylindrical electrode shell connectors through the internal threads 2 and external threads 3 arranged at both ends, and the obtained electrode shell connectors are put into In the copper tile, the copper tile is energized; the electrode paste is added into the cavity, and the electrode paste is gradually melted and sintered into a self-baking electrode 4 to form a composite electrode assembly (that is, an enhanced composite graphite electrode), and the resulting composite electrode assembly is put down together Press and release, and send it to the bottom of the furnace shell for electrification and work.

[0049] Of course, when in use, each submerged arc furnace uses the enhanced composite electrode, and 3-6 electrode column...

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Abstract

The invention relates to an enhanced composite graphite electrode and a manufacturing and using method of the enhanced composite graphite electrode. Due to the fact that an electrode shell comprises carbon fibers, the compressive strength of an outer shell is doubled, and the outer shell does not generate cracks caused by heat stress. By using the principle of surficial skin effect of a current conductor, the enhanced composite graphite electrode is good in electrode conductivity, can reduce energy consumption, and reduce manufacturing cost, and is simple in structure, convenient, and safe and reliable in operation.

Description

[0001] This application is a divisional application of the Chinese invention patent application CN201310195984.9 entitled "A Reinforced Composite Graphite Electrode and Its Manufacturing and Using Method" filed on May 24, 2013. technical field [0002] The invention relates to a method for making a reinforced composite graphite electrode. Background technique [0003] The self-baking electrode is made by putting the electrode paste into the electrode shell welded with ordinary steel plates on the upper part of the submerged arc furnace, and using the Joule heat of the current passing through the electrode itself and the radiant heat of the electric furnace to melt and roast the electrode paste. Under the pressure of the paste column, the conductive electrode carbon block with a certain strength and shape after slow roasting in the smelting process, because it is used, formed and roasted at the same time, the forming and roasting process is omitted, the production process is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/06
Inventor 王金铎杨海春陶国新王金秀唐济革邵河
Owner 河北顺天电极有限公司
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