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Antioxidation aluminium unburned carbon brick and preparation method thereof

A technology for resisting alumina and carbon bricks is applied in the field of aluminum non-burning carbon bricks, which can solve the problems of loss of excellent performance of carbon-containing refractories, difficult wettability of slag, etc., so as to improve oxidation resistance and flexural strength. , the effect of enhanced liquidity

Inactive Publication Date: 2013-01-09
营口鲅鱼圈耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, carbon has poor wettability to slag
[0004] However, at higher temperatures, carbon is very easy to react with oxidizing gases (such as O 2 ) chemical reaction, so that the excellent properties of carbon-containing refractories are lost

Method used

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  • Antioxidation aluminium unburned carbon brick and preparation method thereof
  • Antioxidation aluminium unburned carbon brick and preparation method thereof
  • Antioxidation aluminium unburned carbon brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 anti-alumina silicon-carbon brick (anti-oxidation Al 2 o 3 -SiC-C brick)

[0028] (1) The ratio of raw materials is shown in Table 1

[0029] (2) The preparation method is as follows:

[0030] 1) According to the ratio in Table 1, weigh brown corundum, ferrosilicon nitride and phenolic resin, pre-mix and grind in a sand mixer for 8-10 minutes, then add the remaining raw materials, and mix and grind for 12-15 minutes;

[0031] 2) Put the mixed material into the mold, pressurize it on a 500-ton to 800-ton friction brick press to make a green body;

[0032] 3) Send the green body to the drying kiln for drying. The hot air inlet temperature of the drying kiln is 40-60°C, the temperature of the heat preservation interval is 180°C, the outlet temperature is 40-60°C, and the drying time is not less than 16 hours. The length of the drying kiln is not less than 24 meters, and the interval between carts is 40 to 70 minutes per cart.

[0033] The test results of ...

Embodiment 2

[0036] Embodiment 2 anti-alumina silicon-carbon brick (anti-oxidation Al 2 o 3 -SiC-C brick)

[0037] (1) The ratio of raw materials is shown in Table 1

[0038] (2) The preparation method is as follows:

[0039] 1) According to the ratio in Table 1, weigh brown corundum, ferrosilicon nitride and phenolic resin, pre-mix and grind in a sand mixer for 8-10 minutes, then add the remaining raw materials, and mix and grind for 12-15 minutes;

[0040] 2) Put the mixed material into the mold, pressurize it on a 500-ton to 800-ton friction brick press to make a green body;

[0041] 3) Send the green body to the drying kiln for drying. The hot air inlet temperature of the drying kiln is 40-60°C, the temperature of the heat preservation interval is 180°C, the outlet temperature is 40-60°C, and the drying time is not less than 16 hours. The length of the drying kiln is not less than 24 meters, and the interval between carts is 40 to 70 minutes per cart.

[0042] The test results of ...

Embodiment 3

[0043] Embodiment 3 anti-oxidation alumina magnesia carbon brick (anti-oxidation Al 2 o 3 -MgO-C brick)

[0044] (1) The ratio of raw materials is shown in Table 2

[0045] (2) The preparation method is as follows:

[0046] 1) According to the ratio in Table 2, weigh brown corundum, fused magnesia, ferrosilicon nitride and phenolic resin, pre-mix and grind in the sand mixer for 8-10 minutes, then add the remaining raw materials, and mix and grind for 12 minutes. ~15 minutes;

[0047] 2) Put the mixed material into the mold, pressurize it on a 500-ton to 800-ton friction brick press to make a green body;

[0048] 3) Send the green body to the drying kiln for drying. The hot air inlet temperature of the drying kiln is 40-60°C, the temperature of the heat preservation interval is 180°C, the outlet temperature is 40-60°C, and the drying time is not less than 16 hours. The length of the drying kiln is not less than 24 meters, and the interval between carts is 40 to 70 minutes ...

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Abstract

The invention relates to an antioxidation aluminium unburned carbon brick and a preparation method thereof. The invention adopts the technical scheme that the antioxidation aluminium unburned carbon brick is made of the following raw materials by weight percent: 15-50% of 3-1mm brown fused alumina, 10-20% of 1-0mm brown fused alumina, 0-10% of brown fused alumina of 325 meshes, 0-15% of brown fused alumina of 100 meshes, 0-15% of 3-1mm fused magnesia, 0-10% of 1-0mm fused magnesia, 0-25% of bauxite, 1-5% of aluminium powder, 5-15% of graphite, 0-5% of silicon carbide powder, 3-8% of ferro silicon nitride, 0-1% of asphalt and 2-4% of phenolic resin. The preparation method comprises the working procedures of premixing, mixing and milling, pressing to form a green body, and drying. The invention promotes the sintering of carbonic refractory bricks by introducing the ferro silicon nitride, thus improving the effects of antioxidation and corrosion resistance.

Description

technical field [0001] The invention relates to the field of non-fired carbon bricks used in iron and steel metallurgy, in particular to an aluminum non-fired carbon brick with improved oxidation resistance. Background technique [0002] With the development of ironmaking and steelmaking industries and the improvement of production efficiency, the performance requirements for refractory materials are also continuously increasing. In particular, the performance requirements for unfired carbon brick refractory products used in molten iron pretreatment, converters, and ladles are getting higher and higher. In a series of smelting processes such as molten iron pretreatment, converter, ladle, etc., due to the violent reaction, the use conditions of unfired carbon bricks are very harsh, which is easy to cause oxidative decarburization of carbon bricks, resulting in its resistance to erosion and erosion of molten iron, molten steel, and steel slag. The decline greatly reduces the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/10
Inventor 周清德周晨光
Owner 营口鲅鱼圈耐火材料有限公司
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