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A method for pressing graphite electrode body based on charging interface to avoid digging area

A graphite electrode and interface technology, applied in the direction of material forming presses, presses, manufacturing tools, etc., can solve the problems of strength reduction, reduction of hole wall strength, poor plasticity, etc., and achieve the effect of improving service life and reducing fracture

Active Publication Date: 2019-08-06
JILIN CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the hole wall of the joint hole of the graphite electrode body is easy to break. The reason is that due to the connection requirements of the graphite electrode in use, the graphite electrode body and the graphite electrode joint are connected by threads, and the connecting part is a cone. The graphite electrode The end of the body is cut out of a tapered joint hole, that is, the graphite electrode body has a hollowed out area. During the use of the graphite electrode, it is affected by thermal stress and mechanical vibration, and the strength of the hole wall in the hollowed out area is significantly lower than that of the solid part. The graphite electrode body is easy to break at the hole wall
Due to this intermittent production method, after each pressing, the surface temperature loss of the paste material 2 and the high pressure during pre-pressing caused a charge at the joint of the two pots of paste material 2 during the process of the paste tank 3 being prepared. The interface 4, the paste properties of this charging interface 4 are different from the normal paste properties. It becomes colder, harder, less plastic, and more difficult to destroy, and the adhesion will be greatly reduced. Severe structural defects, once the charging interface 4 is in the hollowed out area of ​​the electrode, the strength of the hole wall of the joint hole of the graphite electrode body will be further reduced, making the electrode more likely to break

Method used

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  • A method for pressing graphite electrode body based on charging interface to avoid digging area

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1, this embodiment: a graphite electrode body pressing method based on the charging interface avoiding the punching area, used for the production of φ500 / 2250mm, 6UHP-6 products, and the equipment adopts the pressing branch of Jilin Carbon Co., Ltd. No. 6 press, the diameter of the paste cylinder of the press is φ1300mm, the length of the nozzle is 1950mm, and the diameter of the nozzle is φ526mm, the details are as follows:

[0031] 1) The first charging is used to determine the position of the charging interface;

[0032] Include the following steps:

[0033] ⑴ Press the paste in the paste tank;

[0034] ⑵The paste cylinder is turned over;

[0035] ⑶ Pour raw crushed powder into the paste tank, and the raw crushed powder must completely cover the material surface in the paste tank;

[0036] ⑷For the first charge, the charge weight is: W=nW 1 ⑴

[0037] In the formula: W --- charge weight; n --- positive integer, the present embodiment n=3; W 1 - the ...

Embodiment 2

[0054] Embodiment 2, this embodiment: a graphite electrode body pressing method based on the charging interface avoiding the punching area, used for the production of φ450 / 2250mm, 6UHP-7 products, the equipment adopts Jilin Carbon Co., Ltd. Pressing Branch Factory No. 6 press, the diameter of the paste cylinder of the press is φ1300mm, the length of the nozzle is 1950mm, and the diameter of the nozzle is φ473mm, the details are as follows:

[0055]1) The first charging is used to determine the position of the charging interface;

[0056] Include the following steps:

[0057] ⑴ Press the paste in the paste tank;

[0058] ⑵The paste cylinder is turned over;

[0059] ⑶ Pour raw crushed powder into the paste tank, and the raw crushed powder must completely cover the material surface in the paste tank;

[0060] ⑷For the first charge, the charge weight is: W=nW 1 ⑴

[0061] In the formula: W --- charge weight; n --- positive integer, the present embodiment n=3; W 1 - the weig...

Embodiment 3

[0078] Embodiment 3, this embodiment: a graphite electrode body pressing method based on the charging interface avoiding the punching area, which is used for the production of φ550 / 2250, 6UHP-8 products, and the equipment adopts the pressing branch of Jilin Carbon Co., Ltd. No. 6 press, the diameter of the paste cylinder of the press is φ1300mm, the length of the nozzle is 1950mm, and the diameter of the nozzle is φ580mm, the details are as follows:

[0079] 1) The first charging is used to determine the position of the charging interface;

[0080] Include the following steps:

[0081] ⑴ Press the paste in the paste tank;

[0082] ⑵The paste cylinder is turned over;

[0083] ⑶ Pour raw crushed powder into the paste tank, and the raw crushed powder must completely cover the material surface in the paste tank;

[0084] ⑷For the first charge, the charge weight is: W=nW 1 ⑴

[0085] In the formula: W --- charge weight; n --- positive integer, the present embodiment n=3; W 1...

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Abstract

The invention provides a graphite electrode body pressing method avoiding a hole digging area based on a charging interface. The graphite electrode body pressing method avoiding the hole digging areabased on the charging interface is characterized by including the following steps that the first time of charging is used for determining the position of the charging interface; the second time of charging is performed; thirdly, a first graphite electrode body is extruded out; the first graphite electrode body is subjected to end cropping; producing and charging are performed; and a graphite electrode body is extruded out. Breakage which the graphite electrode body is likely to generate at the hole wall position can be effectively reduced, and the service life of the graphite electrode body isprolonged.

Description

technical field [0001] The invention relates to the extrusion molding of raw graphite electrode products, which is a graphite electrode body pressing method based on the charging interface avoiding the cut-out area. Background technique [0002] Graphite electrode is a conductive discharge product used in electric furnace smelting. Its principle is that current passes through the electrode to generate discharge phenomenon at the end of the electrode. The phenomenon is arc heat. The arc heat heats the scrap steel to melt the scrap steel. The graphite electrode is continuously connected during use, and the product connected to the graphite electrode is the graphite electrode joint, and the connected graphite electrode is called the graphite electrode body. The problem is that the hole wall of the joint hole of the graphite electrode body is easy to break. The reason is that due to the connection requirements of the graphite electrode in use, the graphite electrode body and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B11/26B30B15/30
CPCB30B11/221B30B11/26B30B15/302
Inventor 关海涛
Owner JILIN CARBON