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Sliding brick and preparation method thereof

A technology of sliding bricks and plate-shaped corundum, which is applied in the field of refractory materials, can solve the problems of poor wear resistance, and achieve the effects of improving wear resistance, high thermal conductivity, thermal shock resistance and erosion resistance

Active Publication Date: 2015-05-13
HUNAN XIANGGANG RUITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese patent with the application number 201010534259.6 discloses a cermet-bonded non-fired low-carbon sliding brick with metal aluminum and metal silicon as binders. The product is low-carbon, high in thermal strength, and has good thermal shock resistance and oxidation resistance. performance, but poor wear resistance

Method used

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  • Sliding brick and preparation method thereof

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preparation example Construction

[0036] The present invention also provides the preparation method of described skateboard brick, comprises the following steps:

[0037] 60wt%~85wt% of tabular alumina, 0~15wt% of fused spinel, 0~5wt% of fused mullite, 3wt%~8wt% of alumina micropowder, 4wt%~10wt% of carbonized Silicon, 2wt%-4wt% silicon, 5wt%-10wt% aluminum and 0.5wt%-1.5wt% boron carbide are mixed and milled to obtain mud;

[0038] After mixing and grinding the mud, pressing it to obtain a sliding slab;

[0039] The sliding slab is dried and fired to obtain the sliding brick; the firing is light firing or high temperature firing.

[0040] According to the present invention, in the process of preparing skateboard bricks, firstly, the raw materials are mixed, and the materials are mixed and milled to make them evenly mixed to obtain mud materials. In the process of preparing the mud, in addition to adding the above-mentioned raw materials, a binder is also added. In terms of the weight percentage of the mud, ...

Embodiment 1

[0052]395kg of sintered tabular alumina of 2~1mm, 1~0.5mm, 0.5~0mm, 325 mesh, 25kg of 1~0mm, 325 mesh silicon carbide, 25kg of CL370 alumina micropowder of 2~3μm, 5kg of aluminum particles of 30~60 mesh, 180-325 mesh aluminum fine powder 20kg, 2.5kg aluminum fiber, 450-500 mesh aluminum-silicon alloy powder 15kg, 300-325 mesh simple silicon powder 10kg, 325 mesh boron carbide 2.5kg, 180 mesh resin powder 5kg and 15.2kg liquid The phenolic resin is kneaded in the kneading machine for 25 minutes, and after being trapped for 24 hours, it is kneaded again in the kneading machine for 20 minutes, and then pressed into a sliding slab by a 630-ton electric screw press, and the adobe is dried in an infrared kiln at room temperature to 180°C , heat treatment at 750°C for 10 hours in a neutral atmosphere in a well-type furnace to obtain skateboard bricks. The skateboard bricks are impregnated with asphalt, and finally smoothed, hooped, assembled, and coated to obtain finished skateboards....

Embodiment 2

[0054] 302.5kg of sintered tabular alumina of 2~1mm, 1~0.5mm, 0.5~0mm, 325 mesh, 25kg of fused mullite of 1~0mm, 50kg of fused spinel of 2~0mm, CL370 of 2~3μm Alumina fine powder 30kg, 1-0mm, 325-mesh silicon carbide 30kg, 30-60-mesh aluminum particles 7.5kg, 180-325-mesh aluminum fine powder 25kg, 2.5kg aluminum fiber, 450-500-mesh aluminum-silicon alloy powder 15kg, 300 ~325 mesh elemental silicon powder 10kg, 325 mesh boron carbide 2.5kg, 180 mesh resin powder 2.5kg, 2.5kg silicone resin and 15.5kg liquid phenolic resin were mixed in the kneader for 30min, after 24h the mud was trapped again Mix and grind in the kneading machine for 15 minutes, and then use a 630-ton electric screw press to press it into a sliding slab. After being dried in an infrared kiln at room temperature to 180°C, the brick is heat-treated at 850°C for 10 hours in a neutral atmosphere in a well-type furnace. The skateboard bricks are obtained, and the skateboard bricks are impregnated with asphalt, an...

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Abstract

The invention provides a sliding brick and a preparation method thereof. The sliding brick is prepared from a mixture through molding and sintering, wherein the mixture comprises plate-shaped corundum, fused spinel, fused mullite, alumina, silicon carbide, silicon, aluminum and boron carbide. According to the invention, plasticity of both aluminum and silicon is combined together, which is favorable for improvement of density and strength of the sliding brick; meanwhile main materials like plate-shaped corundum are used, so the sliding brick has good high temperature performance, erosion resistance and thermal shock resistance. In the process of preparation of the sliding brick, light roasting or high temperature sintering is employed, so the prepared sliding brick has high hot strength and erosion resistance and good cold strength, anti-scouring performance and oxidation resistance.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a sliding brick and a preparation method thereof. Background technique [0002] As one of metallurgical functional refractory materials, sliding bricks are mainly made of four types: aluminum carbon, aluminum zirconium carbon, alkaline, and corundum. With the development of steelmaking technology, the requirements for sliding bricks are increasing, especially higher requirements for thermal shock resistance, corrosion resistance, high temperature structural strength and high temperature wear resistance. [0003] Although aluminum-carbon sliding bricks and aluminum-zirconium carbon sliding bricks have the characteristics of good thermal shock resistance and high strength, they have the disadvantage of being easily oxidized. When the sliding bricks are used in multiple furnaces, the high-temperature structural strength will be reduced due to oxidation, and the board su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 朱新军徐为敏章兴高
Owner HUNAN XIANGGANG RUITAI TECH
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