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Manufacturing technology of high thermal shock resistance graphite electrode and production device thereof

A graphite electrode and manufacturing process technology, which is applied to the manufacturing process of graphite electrodes with high thermal shock resistance and the field of production devices, can solve the problem of high thermal shock resistance of graphite electrodes, reduce production costs and operation processes, and improve oxidation resistance. , Improve the effect of thermal shock resistance

Inactive Publication Date: 2019-05-17
HEFEI CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a manufacturing process and production device of a graphite electrode with high thermal shock resistance, which solves the technical problem of high thermal shock resistance of the graphite electrode in the prior art

Method used

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  • Manufacturing technology of high thermal shock resistance graphite electrode and production device thereof
  • Manufacturing technology of high thermal shock resistance graphite electrode and production device thereof
  • Manufacturing technology of high thermal shock resistance graphite electrode and production device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A manufacturing process of a highly thermal-shock-resistant graphite electrode, comprising the following steps:

[0041] 1) Raw material preparation: take 200kg of petroleum coke, 200kg of needle coke and 100kg of anthracite respectively by weight as raw materials;

[0042] 2) Calcination: Put petroleum coke and pitch coke into a calciner by weight for calcination, heat up to 1280°C, and keep the calcination time for 3 hours. During calcination, the air is sealed, and the protective gas helium is continuously introduced;

[0043] 3) Grinding: Mix calcined petroleum coke and pitch coke for crushing and fine grinding;

[0044] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 400° C., the stirring time to 3 hours, and control the relative air humidity to 80%;

[0045] 5) Roll compaction: compact the stirred raw materials under a pressure of 11MPa, pre-press time is 1h, and pre-press temperature is 120°C to fo...

Embodiment 2

[0052] A manufacturing process of a highly thermal-shock-resistant graphite electrode, comprising the following steps:

[0053] 1) Raw material preparation: take 200kg of petroleum coke, 200kg of needle coke and 100kg of anthracite respectively by weight as raw materials;

[0054] 2) Calcination: Put petroleum coke and pitch coke into a calciner by weight for calcination, heat up to 1320°C, and keep the calcination time for 2 hours. During calcination, the air is sealed, and the protective gas helium is continuously introduced;

[0055] 3) Grinding: Mix calcined petroleum coke and pitch coke for crushing and fine grinding;

[0056] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 300°C, the stirring time to 2.5h, and control the relative air humidity to 85%;

[0057] 5) Rolling: compact the stirred raw materials under a pressure of 12 MPa, pre-pressing time is 2 hours, and the pre-pressing temperature is 130°C to...

Embodiment 3

[0064] A manufacturing process of a highly thermal-shock-resistant graphite electrode, comprising the following steps:

[0065] 1) Raw material preparation: take 200kg of petroleum coke, 200kg of needle coke and 100kg of anthracite respectively by weight as raw materials;

[0066] 2) Calcination: Put petroleum coke and pitch coke into a calciner by weight for calcination, heat to 1300°C, and keep the calcination time for 2 hours. While calcination, the air is sealed, and the protective gas helium is continuously introduced;

[0067] 3) Grinding: Mix calcined petroleum coke and pitch coke for crushing and fine grinding;

[0068] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 350°C, the stirring time to 2.5h, and control the relative air humidity to 90%;

[0069] 5) Rolling: compact the stirred raw materials under a pressure of 15 MPa, pre-pressing time is 1 hour, and pre-pressing temperature is 150°C to form a g...

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Abstract

The invention discloses a manufacturing technology of a high thermal shock resistance graphite electrode and a production device thereof. The technology comprises the following steps of (1) material preparation; (2) burning; (3) grinding; (4) stirring; (5) rolling; (6) calcination; (7) forming; (8) dipping and (9) graphitization. The production device comprises a dipping box body, a fixing plate and a covering plate; the dipping box body is of a box structure with the upper end face being open, bases are evenly distributed at the bottom of a filter tank body, the fixing plate is arranged in the middle of the filter tank body, a clamping groove is formed to extend outwards from one end face of the upper end face of the dipping box body, and inward sinking tanks are formed in the inner sidesof the other three upper end faces of the dipping box body. The preparation technology is characterized in that the formed graphite electrode is placed into the dipping box to be dipped, so that thedipping liquid can completely wet a whole green body of the graphite electrode, then graphitezation is conducted, the cohesion of the graphite electrode is improved, breakage prone to occurring in thegraphitization process of the graphite electrode is reduced, and the integral thermal shock resistance of the graphite electrode is enhanced.

Description

technical field [0001] The invention belongs to the technical field of graphite products, and in particular relates to a manufacturing process and a production device of a graphite electrode with high thermal shock resistance. Background technique [0002] With the continuous development of science and technology, there are more and more technical applications for new energy and new materials. As a high-temperature-resistant conductive material, graphite electrodes are widely used in: electric arc steelmaking furnaces, submerged electric furnaces, resistance furnaces, and the production of special-shaped graphite products. [0003] The processing methods of graphite electrodes in the prior art mainly include three methods: pressurized vibration method, numerical control automatic forming method and mechanical processing method. Pressurized vibration method: After a special machine tool, the shape of the electrode master mold is opposite to that of the electrode. Graphite m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532
Inventor 周卓先王兵
Owner HEFEI CARBON CO LTD
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