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Novel graphite electrode manufacturing technology, and manufacturing equipment thereof

A graphite electrode and manufacturing process technology, which is applied in the manufacturing process of new graphite electrodes and its manufacturing equipment, can solve the problems of easy oxidation of the graphite electrode surface, achieve the effects of enhancing oxidation resistance, shortening the process cycle, and improving adhesion efficiency

Inactive Publication Date: 2019-07-26
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 purpose of the present invention is to provide a new graphite electrode manufacturing process and its manufacturing equipment, which solves the technical problem that the surface of the graphite electrode is easily oxidized during use in the prior art

Method used

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  • Novel graphite electrode manufacturing technology, and manufacturing equipment thereof
  • Novel graphite electrode manufacturing technology, and manufacturing equipment thereof
  • Novel graphite electrode manufacturing technology, and manufacturing equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of manufacturing process of novel graphite electrode, comprises the following steps:

[0046] 1) Raw material preparation: Take 300 kg of petroleum coke, 200 kg of needle coke, and 100 kg of anthracite as raw materials in parts by weight.

[0047] 2) Calcination: Put petroleum coke and pitch coke into a closed calciner for calcination in parts by weight, heat to 1280°C, keep the calcination time at 0.5h, and continuously feed the protective gas helium.

[0048] 3) Grinding: The calcined petroleum coke and pitch coke are mixed and then crushed and finely ground.

[0049] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 300° C., and the stirring time to 3 hours, and mix, and control the relative air humidity at this time to 90%.

[0050] 5) Roll compaction: compact the stirred raw materials under a pressure of 14MPa, pre-compact for 2 hours, and pre-compact at a temperature of 120°C to form a green bo...

Embodiment 2

[0058] A kind of manufacturing process of novel graphite electrode, comprises the following steps:

[0059] 1) Raw material preparation: Take 300 kg of petroleum coke, 200 kg of needle coke, and 100 kg of anthracite as raw materials in parts by weight.

[0060] 2) Calcination: Put petroleum coke and pitch coke into a closed calciner for calcination in parts by weight, heat to 1300°C, keep the calcination time for 1 hour, and continuously feed the protective gas helium.

[0061] 3) Grinding: The calcined petroleum coke and pitch coke are mixed and then crushed and finely ground.

[0062] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 320° C., and the stirring time to 2.8 hours, and mix, and control the relative air humidity at this time to 87%.

[0063] 5) Roll compaction: compact the stirred raw materials under a pressure of 11 MPa, and pre-compact for 1.5 hours at a temperature of 130°C to form a green body. ...

Embodiment 3

[0071] A kind of manufacturing process of novel graphite electrode, comprises the following steps:

[0072] 1) Raw material preparation: Take 300 kg of petroleum coke, 200 kg of needle coke, and 100 kg of anthracite as raw materials in parts by weight.

[0073] 2) Calcination: Put petroleum coke and pitch coke into a closed calciner for calcination in parts by weight, heat to 1320°C, keep the calcination time at 0.5h, and continuously feed the protective gas helium.

[0074] 3) Grinding: The calcined petroleum coke and pitch coke are mixed and then crushed and finely ground.

[0075] 4) Stirring: continue to add anthracite to the raw materials in step 3), and control the stirring temperature to 400° C., and the stirring time to 2.5 hours, and mix, and control the relative air humidity at this time to 80%.

[0076] 5) Roll compaction: compact the stirred raw materials under a pressure of 11 MPa, and pre-compact for 1.5 hours at a temperature of 130°C to form a green body.

[...

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Abstract

The invention discloses novel graphite electrode manufacturing technology, and manufacturing equipment thereof. The novel graphite electrode manufacturing technology comprises steps of 1, material preparation; 2, calcining; 3, grinding; 4, stirring; 5, rolling; 6, primary filtering tank immersion; 7, roasting; 8, moulding; 9, secondary filtering tank immersion; and 10, graphitization. The manufacturing equipment comprises a filtering tank main body; the filtering tank main body is of a box type structure with an upper end opening; locking mechanisms are symmetrically arranged on pair of internal side surfaces of the filtering tank main body, and aeration pipes are symmetrically arranged on the other pair of internal side surfaces of the filtering tank main body. According to the novel graphite electrode manufacturing technology, moulded graphite electrode green compacts are subjected to two times of filtering tank immersion, and the manufacturing equipment is adopted, so that anti-oxidation layers are easily formed on graphite electrode green compact surfaces, contact of graphite electrode surfaces with oxygen in the air is prevented, graphite electrode oxidation resistance is improved, graphite electrode oxidation weight loss is reduced, and graphite electrode stable state is improved further.

Description

technical field [0001] The invention belongs to the technical field of graphite products, and in particular relates to a manufacturing process of a novel graphite electrode and manufacturing equipment thereof. Background technique [0002] With the continuous development of science and technology, graphite electrodes, as high-temperature-resistant conductive materials, are widely used in: electric arc steelmaking furnaces, submerged electric furnaces, resistance furnaces, and the production of special-shaped graphite products. [0003] Graphite electrodes are mainly made of petroleum coke and needle coke, coal tar pitch is used as a binder, and are made through calcination, proportioning, kneading, pressing, roasting, graphitization and other processes. Conductors for heating and melting can be divided into ordinary power graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes according to their quality indicators. The increasing complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532C04B35/622C04B41/87
CPCC04B35/522C04B35/532C04B35/622C04B41/5059C04B41/87C04B2235/3217C04B2235/3409C04B2235/349C04B2235/3826C04B2235/424C04B2235/446C04B2235/447C04B2235/6562C04B2235/6567C04B41/5037C04B41/5015C04B41/5016C04B41/4539C04B41/4578C04B41/0072
Inventor 宋云英邵贤松
Owner HEFEI CARBON CO LTD
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