Method for sticking connection joint of graphite electrode for making steel

A graphite electrode and gluing technology, used in surface pretreatment bonding methods, electric heating devices, electrical components, etc., can solve problems such as limited effect, and achieve the effect of reducing shedding, preventing relaxation and strong bonding

Inactive Publication Date: 2008-10-08
NANTONG RIVER EAST CARBON
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, because the amount of adhesive is limited to tens of grams, and it can only penetrate into a small part of the connecting thread, the effect is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] 1. The graphite joint blank for φ400T4 is impregnated with asphalt with a softening point of 80-85°C, and the impregnated weight gain rate is 1.8-3.0%. The blank after the asphalt impregnation is processed into a joint, and the joint is matched with the φ400 electrode. Use test. As a result of the user's use, there is no relaxation phenomenon at all, and the electrode consumption is also reduced by 4-5%.

[0009] 2. The raw material of graphite joint for 450T4 is impregnated with asphalt with a softening point of 80-85°C, and the impregnated weight gain rate is 1.7-2.8%. The asphalt-impregnated blank is processed into a joint, and the joint is matched with the φ450 electrode. Use test. As a result of the user's use, there is no relaxation phenomenon at all, and the electrode consumption is also reduced by 3.5-4.8%.

[0010] 3. The raw material of graphite joint for 500T4 is impregnated with asphalt with a softening point of 78-83°C, and the impregnated weight gain rat...

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PUM

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Abstract

A method of preventing the graphite electrode connection part joints used in electric furnace steelmaking from relaxing. The method infuses asphalt in the graphite joints blank before processing into products. The best way of infusing is to process the graphite joints blank into the double-cone approximate to the shape of the joints in advance, then infuses. But if infusing the blank which is not processed in advance is also able to achieve the effect. The method directly processes the blank into electrode joints after infusing. The joints and the electrode are given to the users in matching. Adopting the invention is able to lead the electrode to not relax when used by the users, and the electrode consumption is reduced by 3-5%.

Description

Technical field [0001] The utility model relates to a bonding method for connecting joints of graphite electrodes used in electric furnace steelmaking. The utility model can effectively prevent the slack phenomenon from occurring when the electrodes are connected. Background technique [0002] During electric furnace steelmaking, graphite electrodes are screwed together through the joints and the threaded parts of the electrode holes to achieve continuous butt joints between electrodes. Under the action of electromagnetic force and mechanical vibration, the joints and electrode holes often loosen, and the resulting breakage and shedding loss account for about 30% of the total consumption of graphite electrodes for steelmaking. In the past, in order to prevent the connection between the joint and the electrode hole from loosening, it was used to drill holes in the joint and then embed asphalt and other materials. In the process of steelmaking, materials such as asphalt flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/10C09J5/02
Inventor 杨晓智顾玉琪刘明李志宏苏语诚朱毅
Owner NANTONG RIVER EAST CARBON
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