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Aluminium electrolysis prebaked anode raw block preparation composition

A pre-baked anode and aluminum electrolysis technology is applied in the field of carbon materials for aluminum metal smelting, which can solve the problems of low thermal conductivity and high conductivity of the inner pad of particles, and achieve the effects of reducing production costs and reducing baking time.

Inactive Publication Date: 2005-02-16
姬军伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the material with coarse-grained structure inside the carbon product has a high porosity, its thermal conductivity is lower than that of the material with fine-grained structure due to the high conductivity of the pad inside the particles.

Method used

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Embodiment Construction

[0014] After the forged petroleum coke is crushed, sieve out +6-4mm, +4-2mm, +2-0.075mm three kinds of pellets, then make ingredients according to the theoretical formula in the table, put them into the kneading pot for heating and kneading, kneading When the temperature of the mixture in the pot rises to 90°C-110°C, add asphalt into the kneading pot and fully mix it with petroleum coke. After the temperature of the material reaches 140°C-160°C, it is pressed and roasted to make a finished prebaked anode carbon block.

[0015] Granularity mm

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PUM

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Abstract

The invention has solve a technological problem: with the method the receipt to produce aluminum electrolyzing prebaked anode adopts petroleum coke of which the max particle size 6mm.Compared with the old method producing prebaked anode, the finish producing rate is higher and electrical resistivity compressive strength is great and the product less probably chink or deform.. The roasting time is shorter and the cost is less. The key point: prepare prebaked anode and petroleum coke and then temper in the constant proportion, until the temperature is up to 90-110 deg.C, add 16-17% draining, and follows at 140-160deg.C profiling and roasting. The invention can be applied to aluminum electrolyzing prebaked anode producing.

Description

technical field [0001] The invention relates to the field of carbon materials for aluminum metal smelting. Background technique [0002] The smelting and production of metal aluminum is the electrolysis process of molten cryolite-alumina system. The carbon anode material and cathode material lead the current into the electrolytic cell and participate in the electrochemical reaction. The cryolite melt with alumina dissolved in it is used as the electrolyte. After a strong current (30-300KA) direct current is applied, CO is generated on the anode. 2 , aluminum is produced on the cathode. [0003] Carbon anodes can be divided into two categories: anode paste and prebaked anode. Carbon anodes are made of high-quality carbon materials. Usually, forged petroleum coke is used as aggregate and coal tar pitch is used as binder. After processing, it is made into anode paste and Prebaked anode carbon block. The anode paste is directly used as anode on the self-baking aluminum electr...

Claims

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Application Information

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IPC IPC(8): C04B35/52C25C3/12
Inventor 姬军伟郭自忠
Owner 姬军伟
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