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Fiber-reinforced refractory bricks and preparation method thereof

A fiber-reinforced, refractory brick technology is applied in the field of refractory materials for iron and steel metallurgy.

Inactive Publication Date: 2019-12-13
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product of this invention combines the excellent properties of lightweight mullite bricks and ceramic fiber materials, and has the advantages of small bulk density, small specific heat capacity, good thermal shock resistance, and small thermal conductivity, but its highest refractoriness is 1400°C Below, not suitable for use as facing bricks in contact with molten steel

Method used

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  • Fiber-reinforced refractory bricks and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 Preparation of fiber reinforced refractory brick of the present invention

[0046] Fused magnesia (MgO content 96%), corundum powder (Al 2 o 3 content 98%), SiC powder, flake graphite powder, aluminum powder, Mafortek fiber (fiber length 3-10mm), chromium oxide fiber (fiber length 3-10mm), waste paper pulp and phenolic resin according to 74:15:1.5: 2: 0.5: 1: 1: 3: 2 The weight ratio is prepared separately, and the weight ratio of magnesia granules: magnesia powder is 1.4: 1, and the particle size of magnesia granules is 1 mm, except magnesia granules and fibers Except for the binder (waste paper pulp and phenolic resin), the others are all powder materials, and the particle size is not more than 0.2mm.

[0047] The magnesia granular material and the binder are wet-mixed for 10-30 minutes, other raw materials are dry-mixed for 10-30 minutes, and then the dry-mixed material and the wet-mixed material are mixed and kneaded again for 20-30 minutes. After kn...

Embodiment 2

[0049] Embodiment 2 Preparation of fiber reinforced refractory brick of the present invention

[0050] Magnesia powder (MgO content 97%), corundum particles and corundum powder (Al 2 o 3content 98%), SiC powder, flake graphite powder, aluminum powder, Maforteco fiber (fiber length 10-20mm), chromium oxide fiber (fiber length 10-20mm), steel fiber (low carbon content not higher than 0.3%) Carbon steel fiber, fiber length 3-10mm), waste paper pulp and phenolic resin are prepared according to the weight ratio of 65:24:1.5:1:0.3:1:1:1:2.5:2.7, among which corundum granular material: corundum powder material The weight ratio is 1:1, and the particle size of corundum particles is 1.2mm. Except for corundum particles, fibers and binders (waste paper pulp and phenolic resin), the others are all powder materials, and the particle size is not greater than 0.2mm.

[0051] The corundum granules and the binder are wet mixed for 10-30 minutes, other raw materials are dry-mixed for 10-30 m...

Embodiment 3

[0053] Embodiment 3 Preparation of fiber reinforced refractory brick of the present invention

[0054] Magnesia particles and magnesia powder (MgO content 97.5%), corundum particles and corundum powder (Al 2 o 3 content 99%), SiC powder, flake graphite powder, aluminum powder, Mafortek fiber (fiber length 20-30mm), chromium oxide fiber (fiber length 30-50mm), waste paper pulp and phenolic resin according to 44:44:2: 1.2: 0.3: 1.5: 1: 3: 3 The weight ratio is prepared separately, among which the weight ratio of magnesia granular material: magnesia powder material is 1:1, and the weight ratio of corundum granular material: corundum powder material is 1:1 , particle size 1mm, except for corundum and magnesia particles, fibers and binders (waste paper pulp and phenolic resin), the others are powder materials, particle size not greater than 0.2mm.

[0055] The corundum, magnesia granules and binder are wet-mixed for 10-30 minutes, other raw materials are dry-mixed for 10-30 minut...

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Abstract

The invention relates to fiber-reinforced refractory bricks and a preparation method thereof, and belongs to the technical field of refractory materials for ferrous metallurgy. The fiber-reinforced refractory bricks comprise the following components in parts by weight: 70-90 parts of magnesium oxide and / or aluminum oxide, 1-4 parts of silicon carbide, 0.5-10 parts of graphite, 0.3-1 part of aluminum, 0.2-10 parts of refractory fibers and 1-8 parts of a binder. The refractory bricks are capable of solving problems in the prior art perferably that the strength, heat resistance, peeling resistance and erosion resistance of the existing refractory bricks cannot be taken into consideration at the same time; the cost is moderate; and the fiber-reinforced refractory bricks are especially suitableto be taken as furnace linings of electric furnaces, converters and refining furnaces in the metallurgical industry and flow steel bricks for casting.

Description

technical field [0001] The invention relates to a fiber-reinforced refractory brick and a preparation method thereof, and belongs to the technical field of refractory materials for iron and steel metallurgy. Background technique [0002] The refractory materials used in the metallurgical industry require good heat resistance, strength, thermal shock resistance and corrosion resistance to meet the needs of steel manufacturing. For example, the refractory materials used in the inner lining of ladles have very high requirements for high-temperature comprehensive performance, and must have the ability to withstand long-term contact with molten steel at 1650-1720 ° C without being damaged. At present, the service life of linings used in domestic electric furnaces, converters, refining furnaces and tundishes is not high, generally about 65 furnaces, mainly due to spalling caused by thermal shock and penetration and erosion of slag. Therefore, providing a high-strength, high-tempe...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/80C04B35/04C04B35/047
CPCC04B35/04C04B35/047C04B35/66C04B35/80C04B2235/3217C04B2235/3826C04B2235/402C04B2235/425C04B2235/5216C04B2235/522C04B2235/524C04B2235/5427C04B2235/602C04B2235/606C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/77C04B2235/96
Inventor 李雄林发驹屈小科
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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