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Kneading and compacting method for carbon anode for aluminum

A technology of carbon anode and forming method, which is applied in the field of kneading and forming of carbon anode for aluminum, which can solve the problems of unqualified product quality, increased investment, and lack of carbon for aluminum, etc., and achieves the goal of reducing cleaning difficulty, reducing production cost, and broad application prospects Effect

Active Publication Date: 2008-07-16
四川启明星铝业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the kneading temperature exceeds 190°C, the following problems will be caused: 1. To increase the kneading temperature, it is necessary to improve the preheating screw equipment, which will greatly increase the investment; 40°C cooling capacity, so it can only be molded at a temperature higher than 150°C, and the existing technology will have cracks when molding at this temperature, making the product quality unqualified
[0004] At present, there are no reports on the practical application of high-temperature kneading (kneading temperature exceeding 190°C) and high-temperature forming (forming temperature exceeding 150°C) methods for aluminum carbon anodes, and there is no use of modified asphalt or high-temperature asphalt with a softening point of 120-130°C to produce aluminum. There are reports on the practical application of carbon anode blocks or anodes, let alone industrial applications

Method used

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  • Kneading and compacting method for carbon anode for aluminum
  • Kneading and compacting method for carbon anode for aluminum

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Experimental program
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Effect test

Embodiment I

[0023] Application of embodiment 1 aluminum with carbon anode kneading molding method

[0024] The EIRICH kneader is used as the paste kneading equipment, and the conventional cooler in this field is the cooling equipment. The kneading temperature is increased to 195 by combining the combination of increasing the aggregate preheating temperature and the frictional heating between the materials in the kneading machine in high-speed friction contact. ~210°C. The control indicators of specific production parameters are shown in Table 1.

[0025] Under the same production line, the production capacity of 23-24 tons / hour is number 1#, the production capacity of 30 tons / hour is number 2#, the production capacity of 32.5 tons / hour is number 3#, and the production capacity of 35 tons / hour is number 4#. Production capacity of 40 tons / hour is number 4#.

[0026] Table 1 Production Specific Parameter Control Indicators

[0027]

Embodiment 2

[0029] The quality of the carbon anode block for aluminum produced by the carbon kneading method for aluminum of the present invention is compared with the national quality standard in Table 2 (numbering is the same as in Example 1).

[0030] Table 2 The carbon anode block quality for aluminum of the present invention and the national standard comparison table

[0031]

[0032] As can be seen from Table 2, the resistivity, true density, bulk density, and compressive strength of the carbon anode block for aluminum produced by the carbon kneading method for aluminum of the present invention are all better than the national first-class quality standard, and the compressive strength advantage is particularly obvious.

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Abstract

The invention relates to a kneading and compacting method for carbon anodes used for aluminum and belongs to the technical field of carbon anodes used for aluminum. The kneading and compacting method for carbon anodes in aluminum of the invention comprises the following steps: a. preheating aggregates at the temperature of 180 - 195 DEG C; b. burdening liquid bitumen at the temperature of 175 - 185 DEG C; c. kneading and compacting at the temperature of 195 - 210 DEG C; d. cooling to the temperature of 165 plus or minus 10 DEG C and shaping under the vacuum degree of 50mbar. The kneading and compacting method for carbon anodes in aluminum of the invention increases application scope of materials, reduces proportion of the bitumen, ensures the quality of the anodes block, reduces cleaning difficulty of the anodes block after roasting, reduces production cost of the anodes block and reduces harmful gas emission. The quality of the product produced by the method of the invention is superior to the national primary quality standard.

Description

technical field [0001] The invention relates to a method for kneading and forming a carbon anode for aluminum, which belongs to the technical field of carbon anode for aluminum. Background technique [0002] At present, the biggest feature of the kneading method of prebaked anodes in my country's aluminum industry is that the traditional horizontal kneader or kneading pot is used as the kneading equipment for the first stage of kneading, and the second stage uses a powerful cooler or a horizontal cooler. Most manufacturers are due to the lack of liquid pitch technology application, the paste kneading temperature can be increased, and its process parameters are: aggregate preheating temperature 160-175°C, liquid asphalt batching temperature 175-185°C, kneading temperature 180-190°C, cooling capacity of about 40°C through a powerful cooler , Cool the paste to a level of 140-150°C and enter the molding process. [0003] Studies have shown that the wetting contact angle between a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12
Inventor 王有来陈才荣陈向阳宁前进贺磊
Owner 四川启明星铝业有限责任公司