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Energy-saving and consumption-reducing prebaked anode preparation method and prebaked anode

A prebaked anode and roasting technology, which is applied in the field of metallurgy, can solve the problems of loose anode bridging structure, low anode density, low strength, and reduced current efficiency, and achieve energy saving, improved reactivity, and low resistivity.

Active Publication Date: 2019-10-08
SUNSTONE DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the case of poor wettability of asphalt, the bridging structure of the anode is loose after roasting, and the density and strength of the anode are low. In the actual production process, there will be quality problems such as carbon slag falling off and current efficiency decline.

Method used

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  • Energy-saving and consumption-reducing prebaked anode preparation method and prebaked anode
  • Energy-saving and consumption-reducing prebaked anode preparation method and prebaked anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Sieve and classify the calcined petroleum coke raw materials to obtain the following granules and powders: 25wt% of fine granules with 0.15mm

[0075] Weigh 1.0 kg of coal tar pitch and 0.03 kg of additive palmitic acid; and weigh 0.05 kg of the aforementioned powder a with a particle size of ≤0.15 mm.

[0076] Mix and knead the coal tar pitch, additives and powder a evenly, preheat to 180°C; then add the pellets and the remaining powder, knead evenly, heat to 180°C, take it out after 20 minutes, and obtain the mixed paste;

[0077] Put the mixed paste into the mold in batches, hot press molding, molding at 50MPa, and hold the pressure for 1min to obtain the prebaked anode ...

Embodiment 2

[0080] Sieve and classify the calcined petroleum coke raw materials to obtain the following granules and powders: 25wt% of fine granules with 0.15mm

[0081] Weigh 1.1 kg of coal tar pitch and 0.035 kg of additive palmitic acid; and weigh 0.06 kg of the aforementioned powder a with a particle size of ≤0.15 mm.

[0082] Mix and knead coal tar pitch, additives and powder a evenly, preheat to 160°C; then add granules and the remaining powder, knead evenly, heat to 160°C, take it out after 30 minutes, and obtain a mixed paste;

[0083] Put the mixed paste into the mold in batches, hot press molding, molding at 50MPa, and hold the pressure for 1min to obtain the prebaked anode green bl...

Embodiment 3

[0086] Sieve and classify the calcined petroleum coke raw materials to obtain the following granules and powders: 25wt% of fine granules with 0.15mm

[0087] Weigh 0.95 kg of coal tar pitch and 0.025 kg of additive palmitic acid; and weigh 0.04 kg of the aforementioned powder a with a particle size of ≤0.15 mm.

[0088] Mix and knead coal tar pitch, additives and powder a evenly, preheat to 170°C; then add granules and the remaining powder, knead evenly, heat to 170°C, take it out after 25 minutes to obtain a mixed paste;

[0089] Put the mixed paste into the mold in batches, hot press molding, molding at 50MPa, and hold the pressure for 1min to obtain the prebaked anode green blo...

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Abstract

The invention relates to a novel energy-saving and consumption-reducing pre-baked anode preparation method and a pre-baked anode. According to the preparation method, the wettability, the fluidity andthe permeability of the coal asphalt is improved through a specific additive, so that the carbon consumption is reduced, and the energy is saved. The pre-baked anode is relatively low in electrical resistivity, and meanwhile, the reactivity of the carbon dioxide and the air is improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, relates to an anode of an aluminum electrolytic cell and a production method thereof, and particularly relates to a method for preparing a prebaked anode which saves energy and reduces consumption and the prebaked anode. Background technique [0002] In the aluminum electrolysis process, the prebaked anode plays a vital role in the production process of the aluminum electrolytic cell. Firstly, the prebaked anode acts as a conductor to introduce current into the electrolytic cell; secondly, the prebaked anode participates in the aluminum electrolysis reaction as an anode material. Therefore, the overall quality of the prebaked anode has a great influence on the current efficiency, electrolysis energy consumption, primary aluminum stability and cost control. [0003] As a binder for prebaked anodes, coal tar pitch or modified coal pitch is usually used. The wettability, fluidity, plasticity, permeabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/12
Inventor 郎光辉刘瑞李焰张守俊高守磊王志国许秀芹刘涛
Owner SUNSTONE DEV
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