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Corundum base brick for steel ladles and production method thereof

A corundum-based, bottom-coated brick technology, which is applied in the field of refractory materials, can solve problems such as short service life and poor corrosion resistance, and achieve the effects of increasing service life, improving high-temperature performance, and improving corrosion resistance

Active Publication Date: 2018-03-16
瑞泰马钢新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the bottom brick of the ladle is generally made of aluminum-magnesium carbon, mainly made of bauxite, magnesia, etc., as the main raw materials, but these materials have poor corrosion resistance and short service life.

Method used

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  • Corundum base brick for steel ladles and production method thereof
  • Corundum base brick for steel ladles and production method thereof
  • Corundum base brick for steel ladles and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A corundum bottom brick for a ladle, prepared from a mixture and a phenolic resin, the amount of the phenolic resin is 4.5% of the amount of the mixture, and the mixture includes the following raw materials in weight percentages, as shown in Table 1 .

[0035] Its preparation method is:

[0036] (1) Premixing the corundum fine powder, spinel micropowder, alumina micropowder and silicon carbide fine powder of the formula amount for 40 minutes to obtain the premixed fine powder;

[0037] (2) Add plate-shaped corundum particles, white corundum particles, fused magnesia particles and flake graphite to the mixer, and mix and grind for 1 minute;

[0038] (3) in step (2), add part binding agent and carry out kneading 5min, the weight of part binding agent is 6% of binding agent gross weight, add premix fine powder and remaining binding agent then, continue mixing 25min, obtain mud material;

[0039] (4) the mixed mud material of step (3) is rolled and formed by a friction p...

Embodiment 2

[0045] A corundum bottom brick for a ladle, prepared from a mixture and a phenolic resin, the amount of the phenolic resin is 4.5% of the amount of the mixture, and the mixture includes the following raw materials in weight percentages, as shown in Table 2 .

[0046] Its preparation method is:

[0047] (1) Premixing the corundum fine powder, spinel micropowder, alumina micropowder and silicon carbide fine powder of the formula amount for 45min to obtain the premixed fine powder;

[0048] (2) Add tabular corundum particles, white corundum particles, fused magnesia particles and flake graphite into the mixer, and mix and grind for 2 minutes;

[0049] (3) add part binding agent in step (2) and carry out kneading 8min, the weight of part binding agent is 8% of binding agent gross weight, then add premixed fine powder and remaining binding agent, continue mixing 30min, obtain mud material;

[0050] (4) the mixed mud material of step (3) is rolled and formed by a friction press; ...

Embodiment 3

[0056] A corundum-based bottom brick for a ladle, prepared from a mixture and a phenolic resin, the amount of the phenolic resin is 4.5% of the amount of the mixture, and the mixture includes the following raw materials in weight percentages, as shown in Table 3 .

[0057] Its preparation method is:

[0058] (1) Premixing the corundum fine powder, spinel micropowder, alumina micropowder and silicon carbide fine powder of the formula amount for 50 minutes to obtain the premixed fine powder;

[0059] (2) Add plate-shaped corundum particles, white corundum particles, fused magnesia particles and flake graphite to the mixer, and mix and grind for 1 minute;

[0060] (3) Add part of binder to step (2) and knead for 10 minutes, the weight of part of binder is 10% of the total weight of binder, then add premixed fine powder and remaining binder, and continue mixing for 20 minutes to obtain mud material;

[0061] (4) the mixed mud material of step (3) is rolled and formed by a frict...

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Abstract

The invention provides a corundum base brick for steel ladles and a production method thereof. The corundum base brick for steel ladles is produced with a mixture and a binder; the mixture includes, by weight, 20-40% of platy corundum particles, 10-20% of white corundum particles, 1-10% of electro-melted magnesia particles, 15-34% of corundum fine powder, 1-6% of flake graphite, 2-8% of spinel micro powder, 2-8% of alumina micro powder and 0.5-3% of silicon carbide fine powder. Compared with alumina, the corundum base brick using the platy corundum particles, white corundum particles, electro-melted magnesia particles and the like as main materials has the advantages that after the platy corundum and white corundum are introduced in, the corundum base brick has greatly improved breaking and compression strength, thermal shock resistance, creep resistance and stripping resistance and the corundum base brick can fully meet the application needs of steel plants.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a corundum bottom brick for a ladle and a preparation method thereof. The product is mainly suitable for the working layer of the bottom of a ladle. Background technique [0002] The ladle is an important device in the metallurgical industry, which plays the role of storing and transferring molten steel; at the same time, it also has the dual task of refining outside the furnace. The service life of the ladle is not only related to the consumption of refractory materials, but also directly affects the normal production of steelmaking . [0003] In recent years, the secondary refining ratio of ladles has been increasing day by day. At the same time, the requirements for refining quality of steel are getting higher and higher, and the working conditions of ladles are becoming increasingly severe. In order to adapt to the above situation, further improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3206C04B2235/3222C04B2235/3826C04B2235/77C04B2235/96
Inventor 彭学峰张松林郁书中崔任渠马迎华陈佳
Owner 瑞泰马钢新材料科技有限公司
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