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Preparation method of choke block for aluminum electrolytic tank

A technology of aluminum electrolytic cells and choke blocks, which is applied in the field of electrolytic cells, can solve the problems of undisclosed specific materials and preparation methods of cathode choke devices, and achieve the effects of eliminating severe erosion, reducing workload, and improving system operation rate

Active Publication Date: 2012-11-14
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent only involves the main raw materials of the cathode choke device and does not disclose the specific materials and preparation methods of the cathode choke device

Method used

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  • Preparation method of choke block for aluminum electrolytic tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Use formula 1 to prepare flow blocking block for aluminum electrolytic cell: mix ingredients according to formula 1, add water to different components, send them into a forced mixer and stir evenly for 8 minutes; place the mold on a vibrating table, and add the stirred ingredients into the mold , start the vibrating table to vibrate for 3 minutes; demould after natural curing for 35 hours, and then naturally cured for 40 hours to obtain cast products; send the cast products to a high-temperature kiln at 1600 ° C for firing and melting, and then recrystallize to obtain flow-blocking blocks for aluminum electrolytic cells . After testing, the product performance indicators are shown in Table 1.

[0055] After the choke block of the present invention is integrally cast, it relies on its own weight to block the flow of aluminum liquid. Compared with the traditional multi-block combination, it can reduce the overall usage of the choke block and reduce the volume of the elect...

Embodiment 2

[0058] Use formula 2 to prepare flow blocking block for aluminum electrolytic cell: mix ingredients according to formula 2, add water to different components, send them into a forced mixer and stir evenly for 12 minutes; place the mold on a vibrating table, and add the stirred ingredients into the mold , start the vibrating table to vibrate for 5 minutes; demould after 40 hours of natural curing, and then naturally cured for 50 hours after demoulding to obtain cast products; send the cast products to a high-temperature kiln at 1650 ° C for firing and melting, and then recrystallize to obtain a choke block for aluminum electrolytic cells .

[0059]

Embodiment 3

[0061] Use formula 3 to prepare flow blocking blocks for aluminum electrolytic cells: mix ingredients according to formula 3, add water to different components, and send them to a forced mixer to stir evenly for 10 minutes; place the mold on a vibration table, and add the stirred ingredients to the mold , start the vibrating table to vibrate for 3-5 minutes; demould after natural curing for 38 hours, and then naturally cured for 45 hours to obtain cast products; send the cast products to a high-temperature kiln at 1600-1650 ° C for firing and melting, then recrystallize to obtain an aluminum electrolytic cell Use choke blocks.

[0062]

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Abstract

The invention relates to a preparation method of a choke block for an aluminum electrolytic tank and belongs to the technical field of electrolytic bathes. The preparation method comprises the following steps of: weighing and mixing the following raw materials in percentage by weight: 70-85 percent of tabular corundum, 8-15 percent of magnesia fine powder, 4-13 percent of alumina micro powder, 1.5-6 percent of calcium aluminate cement, 0.5-3 percent of spinel fine powder and 0.5-1 percent of electric smelting zirconia, wherein the total quantity of the raw materials is 100 percent, and 0.02-0.2 percent by weight of explosion-proof fiber and 0.1-0.3 percent by weight of retarder are added, adding water into different components and conveying into a forced agitator to uniformly agitate for 8-12 minutes; installing a mould onto a vibration platform, adding agitated ingredients into the mould and starting the vibration platform to vibrate for 3-5 minutes; naturally curing for 35-40 hours, demoulding and naturally curing for 40-50 hours again to obtain a casting product; and conveying the casting product into a high-temperature kiln with a temperature of 1600-1650 DEG C, firing, melting and re-crystallizing to obtain the choke block for the aluminum electrolytic tank. The choke block prepared by the method has good choke effect, good corrosion resistance and high thermal stability.

Description

technical field [0001] The invention relates to a preparation method of a choke block for an aluminum electrolytic cell, belonging to the technical field of electrolytic cells. Background technique [0002] With the improvement of the design and operation technology level of aluminum electrolytic cells, the newly designed and constructed aluminum electrolytic cells at home and abroad are developing in the direction of large-scale. The current used increases to 500KA-700KA or even above. my country's aluminum electrolysis technology still needs a lot of improvement in the energy consumption of the electrolytic cell. At present, the direct current consumption of domestic aluminum factories requires 13,200-13,500 kilowatt-hours of electricity for one ton of aluminum, and some even approach 14,000 kilowatt-hours of electricity. [0003] In the aluminum electrolysis process, the cell voltage is an important indicator affecting energy consumption. Without changing the cell struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/107
Inventor 朱国平常正钦山国强朱其良彭晶晶
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD