Chromium zirconium mullite refractory material and preparation method thereof

A refractory material, zircon mullite technology, applied in the field of refractory materials, can solve problems such as spalling, brick body erosion, block falling, etc., and achieve the effect of excellent thermal shock resistance and high temperature slag resistance

Active Publication Date: 2014-01-08
ZHENGZHOU HRD NEW MATERIAL CO LTD
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Problems solved by technology

[0005] At present, domestic glass furnace tongue bricks mainly use fused zirconia corundum bricks and fused rebonded corundum mullite bricks (1) Fused zirconia corundum bricks are due to their very dense structure and the presence of a large amount of zirconia and corundum in the bricks. , so that it has strong corrosion resistance, but when it is used on the tongue, the temperature fluctuation is relatively frequent and the crystal changes inside the brick (zirconia appears monoclinic tetragonal crystal transformation at about 1100-1200 ° C), the brick body is affected The impact of thermal stress causes it to burst and even fall off (some have already occurred in the kiln) seriously affecting the service li

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  • Chromium zirconium mullite refractory material and preparation method thereof
  • Chromium zirconium mullite refractory material and preparation method thereof

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[0016] A chromium zirconium mullite refractory material. The chromium zirconium mullite refractory material uses fused mullite or sintered mullite as aggregate, and uses zircon powder, corundum powder, and chromium oxide green as the matrix part of the product. The weight ratio of refractory raw materials is 65% of mullite, 10% of corundum powder, 15% of zircon powder, and 10% of chromium oxide green.

[0017] The mullite is Al 2 O 3 74.5%, SiO 2 25% mullite, the corundum powder ≤325 mesh, Al 2 O 3 ≥99%, the zircon powder ≤325 mesh, ZrO 2 ≥65%, the chromium oxide green ≤325 mesh, CrO 2 ≥99%.

[0018] A method for preparing the refractory material is designed according to the above formula. After all the raw materials are uniformly mixed in a wet mill or a mixer, about 3% of the paper slurry is added as a binder, and the material is mixed for 8 hours after being evenly mixed. , Or directly use a press for forming. After the bricks are dried, they are kept at a high temperature of ab...

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Abstract

The invention relates to a chromium zirconium mullite refractory material and a preparation method thereof. The chromium zirconium mullite refractory material takes fused mullite or sintered mullite as an aggregate and takes zirconite powder, corundum powder and chromium oxide green as product matrix parts. The raw materials of the refractory material comprise 65% of mullite, 10% of corundum powder, 15% of zirconite powder and 10% of chromium oxide green by weight. The sintered chromium zirconium mullite refractory product is mainly used in glass melting furnaces, glass fiber melting furnaces and steel and chemical kilns, and has the high temperature use characteristics of excellent thermal shock resistance, strong high temperature cracking and slag resistance, no stripping and the like.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a chromium-zirconium mullite refractory material and a preparation method thereof. Background technique [0002] Mullite (usually composed of 3Al 2 o 3 2SiO2 2 ) is the SiO 2 -Al 2 o 3 The only stable crystal in a two-phase system and one of the most common industrial ceramics. Because mullite has excellent high temperature strength, creep resistance, low thermal expansion coefficient, good dielectric properties, high transmittance in the mid-infrared region, good chemical stability and thermal stability, and can be maintained at elevated temperatures It has excellent mechanical properties and stability in oxidizing atmosphere, and it has important application prospects in electronics, optics and high temperature structures. [0003] Chromium-zirconium-mullite refractory products are a kind of refractory products developed mainly for problems that ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 李鹏海张洪亮宋学华
Owner ZHENGZHOU HRD NEW MATERIAL CO LTD
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