Preparation method for low-carbon aluminum-silicon-carbide carbon brick

A technology of silicon carbide carbon bricks and alumina, which is applied in the field of refractory materials, can solve the problems of increased energy consumption, increased heat loss, and large temperature drop of molten iron, and achieves good performance, reduced use, and reduced thermal conductivity.

Active Publication Date: 2014-02-19
ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (1) Due to the high carbon content, the thermal conductivity is also high, which increases the heat loss and causes the temperature drop of molten iron during transportation and pretreatment, thereby increasing energy consumption;
[0007] (2) A large amount of precious graphite resources are consumed. Due to the decreasing graphite resources, the price is increasing day b

Method used

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  • Preparation method for low-carbon aluminum-silicon-carbide carbon brick
  • Preparation method for low-carbon aluminum-silicon-carbide carbon brick
  • Preparation method for low-carbon aluminum-silicon-carbide carbon brick

Examples

Experimental program
Comparison scheme
Effect test

Example

[0039] Embodiment 1~2 and comparative example 1~2

[0040] The preparation method of the aluminum silicon carbide carbon bricks in Examples 1-2 and Comparative Examples 1-2 is as follows:

[0041] (1) Mix and stir the particles with a particle size of 1 mm or more in the raw material of aluminum silicon carbide carbon bricks and organic silicon fibers for 2 minutes;

[0042] (2) Mix the mixture obtained in step (1) with the phenolic resin and stir for 5 minutes;

[0043] (3) Mix the mixture mixed with phenolic resin and graphite in step (2) and stir for 10 minutes;

[0044] (4) Mix the mixture mixed with graphite in step (3) with the remaining components and stir for 45 minutes;

[0045] (5) The final product in step (4) is finished at 80MPa, and then dried at 220°C for 48 hours to obtain a low-carbon aluminum silicon carbide carbon brick.

[0046] The compositions in parts by weight of the raw materials in Examples 1-2 and Comparative Examples 1-2 are shown in Table 1, and...

Example Embodiment

[0054] The aluminum silicon carbide carbon brick prepared in Example 1 has a carbon content of 6.7%, a thermal conductivity of 5.3W / (m K), and a water-cooled thermal shock stability of 20 times at 1100°C. It is used on a ladle , the temperature of the iron shell of the ladle is 20°C lower than that of Comparative Example 1, the heat preservation effect is better, and the service life is the same as that of Comparative Example 1.

Example Embodiment

[0055] The carbon content of the aluminum silicon carbide carbon brick prepared in Example 2 is 8.2%, the thermal conductivity is 6.2W / (m K), and the number of water-cooled thermal shock stability at 1100°C is 20 times. When in use, the temperature of the iron shell of the mixed iron car is 30°C lower than that of Comparative Example 2, the heat preservation effect is better, and the service life is the same as that of Comparative Example 2.

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Abstract

The invention discloses a preparation method for a low-carbon aluminum-silicon-carbide carbon brick. The preparation method includes the following steps: raw materials for the low-carbon aluminum-silicon-carbide carbon brick are all mixed, and the mixture is subjected to die pressing and drying to obtain the low-carbon aluminum-silicon-carbide carbon brick; the low-carbon aluminum-silicon-carbide carbon brick comprises the following raw materials in parts by weight: 55 to 85 parts of an aluminum oxide raw material, 5-15 parts of silicon carbide, 1 to 7 parts of a carbon raw material, 3 to 5 parts of a binding agent, 1 to 5 parts of an antioxidant, and 0.01 to 0.5 part of organic silicon fiber. The preparation method for the low-carbon aluminum-silicon-carbide carbon brick provided by the invention has the advantages that the carbon content of the prepared aluminum-silicon-carbide carbon brick is lower, and the heat conductivity is smaller, so that the energy is saved, and the consumption is reduced.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a method for preparing low-carbon aluminum silicon carbide carbon bricks. Background technique [0002] Due to its excellent corrosion resistance and thermal shock resistance, aluminum silicon carbide carbon bricks are widely used as furnace lining materials on various molten iron containers in ironmaking systems. [0003] The mass fraction of carbon in aluminum silicon carbide carbon bricks in the prior art is usually 8% to 16%. For example, the invention with application publication number CN102329142A discloses an aluminum silicon carbide carbon brick, which is composed of the following parts by weight Raw materials: Zinc 1-8 with a particle size of 200-300 mesh, 40-60 high-alumina material with a particle size of 5-0mm, silicon carbide 10-15 with a particle size of 120-320mm, and high-alumina powder 20 with a particle size of 120-180mm -30, -199# graphite 10-15, clay powd...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王落霞方义能吴斌高雄赵飞
Owner ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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