A production process for carbon electrode containing scale graphite

A production process and flake graphite technology, applied in the field of electric energy carrier materials for submerged arc furnaces, can solve the problems of high power consumption, high electrode consumption, high production cost of industrial silicon, and small allowable current load, etc., to improve output and current density. Large, reduce the effect of electrode consumption and power consumption

Inactive Publication Date: 2005-01-26
河北顺天电极有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, ordinary carbon electrodes containing artificial graphite are commonly used in industrial silicon smelting, and petroleum coke, artificial graphite, and coal tar pitch are used as raw materials. However, artificial graphite is expensive and has limited resources, and the carbon electrode containing artificial graphite has high resistance, and the allowable current The load is small, the electrical conductivity and thermal conductivity are poor, so that part of the electric energy is lost on the electrodes, forming thermal stress, causing block drop in industrial silicon smelting, resulting in high power consumption and electrode consumption, resulting in high production costs of industrial silicon , compared with the international level of the same industry, there is a big gap, and it is in a disadvantaged position in the competition with international counterparts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: batching: the percentage by weight of this process batching composition is: 0.075mm calcined petroleum coke powder 23%, 0.075mm flake graphite powder 8%, 0.5mm calcined petroleum coke 18%, 4mm calcined petroleum coke 19%, 4mm electric calcined anthracite 6%, 10mm calcined petroleum coke 10%, binder medium temperature coal tar pitch 16%.

[0025] Kneading: ①Add the weighed raw materials into a 2000L horizontal twin-shaft kneader; ②Perform dry mixing, the dry mixing time is 35 minutes, and the dry mixing temperature is 120°C; ③When the dry mixing temperature is 120°C, add The medium temperature coal tar pitch at 170°C is kneaded; ④The kneading time is 40 minutes, and the kneading temperature is 145°C.

[0026] Molding: ① Cool the kneaded paste on a cooling machine, and put it into the mold when the temperature of the paste drops to 120°C; ② Adopt hydraulic vertical vibration molding technology, the main process parameters are: hydraulic pressure 5Mpa, amplit...

Embodiment 2

[0029] Embodiment 2: batching: the percentage by weight of this process batching composition is: 0.15mm calcined petroleum coke powder 28%, 0.15mm flake graphite powder 2%, 4mm calcined petroleum coke 23%, 10mm calcined petroleum coke 11%, 10mm Electric calcined anthracite 14%, 16mm calcined petroleum coke 2%, binder medium temperature coal tar pitch 20%,

[0030] Kneading: ①Add the weighed raw materials into a 2000L horizontal twin-shaft kneader; ②Perform dry mixing, the dry mixing time is 40 minutes, and the dry mixing temperature is 125°C; ③When the dry mixing temperature is 125°C, add The medium temperature coal tar pitch at 180°C is kneaded; ④The kneading time is 45 minutes, and the kneading temperature is 150°C.

[0031] Molding: ① Cool the kneaded paste on a cooling machine, and put it into the mold when the temperature of the paste drops to 125°C; ② Adopt hydraulic vertical vibration molding technology, the main process parameters are: hydraulic pressure 8Mpa, amplitud...

Embodiment 3

[0034] Embodiment 3: batching: the percentage by weight of this process batching composition is: 0.10mm calcined petroleum coke powder 26%, 0.10mm flake graphite powder 5%, 2.5mm calcined petroleum coke 21%, 7mm calcined petroleum coke 15%, 7mm electric calcined anthracite 10%, 13mm calcined petroleum coke 5%, binder medium temperature coal tar pitch 18%.

[0035] Kneading: ①Add the weighed raw materials into a 2000L horizontal twin-shaft kneader; ②Perform dry mixing, the dry mixing time is 38 minutes, and the dry mixing temperature is 122°C; ③When the dry mixing temperature is 122°C, add The medium temperature coal tar pitch is kneaded at 175°C; ④The kneading time is 42 minutes, and the kneading temperature is 148°C.

[0036] Molding: ① Cool the kneaded paste on a cooling machine, and put it into the mold when the temperature of the paste drops to 122°C; ② Adopt hydraulic vertical vibration molding technology, the main process parameters are: hydraulic pressure 6Mpa, amplitud...

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Abstract

The invention discloses a producing technics of squama graphite carbon electrode, its material use following powder gravity percentage: 0.075-0.15mm petroleum coke powder after calcining 23-28%, 0.075-0.15mm squama graphite powder 2-8%, 0.5-4mm petroleum coke after calcining 18-23%, 4-10mm petroleum coke after calcining 11-19%, 4-10mm electric calcining anthracite 6-14%, 10-16mm petroleum coke after calcining 2-10%, warm pitch of binder 16-20%, pugging, forming, baking the above material, then machining, the carbon electrode smelt industry silicon which is produced by the invention, the yield can be improved greatly, the consuming of electrode and electric energy can be reduced, so does the producing cost.

Description

technical field [0001] The invention relates to a production process of an electric energy carrier material for a submerged arc furnace, in particular to a production process of a carbon electrode containing flake graphite. technical background [0002] At present, ordinary carbon electrodes containing artificial graphite are commonly used in industrial silicon smelting. Petroleum coke, artificial graphite, and coal tar pitch are used as raw materials. However, artificial graphite is expensive and has limited resources, and the carbon electrode containing artificial graphite has high resistance, and the allowable current The load is small, the electrical conductivity and thermal conductivity are poor, so that part of the electric energy is lost on the electrodes, forming thermal stress, causing block drop in industrial silicon smelting, resulting in high power consumption and electrode consumption, resulting in high production costs of industrial silicon , Compared with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/085
Inventor 王金铎杨海春陶国新王金秀
Owner 河北顺天电极有限公司
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