Dolomite-periclase-calcium zirconate composite fireproof material and preparation method thereof

A refractory material, calcium zirconate technology, applied in the field of smelting refractory materials, can solve the problems of poor thermal shock stability, poor hydration resistance, no corrosion resistance, etc., to improve performance, reduce sintering temperature, and increase service life Effect

Active Publication Date: 2014-04-02
LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the domestic AOD furnace for smelting stainless steel and special steel and one of the refractory materials for refining ladles are magnesia-calcium bricks. Poor hydration resistance and poor thermal shock stability; no erosion resistance, poor erosion resistance

Method used

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  • Dolomite-periclase-calcium zirconate composite fireproof material and preparation method thereof
  • Dolomite-periclase-calcium zirconate composite fireproof material and preparation method thereof
  • Dolomite-periclase-calcium zirconate composite fireproof material and preparation method thereof

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Embodiment Construction

[0029] High-quality dolomite-periclase-calcium zirconate composite refractory material is prepared from the following raw materials by weight percentage: 5-8mm magnesia-calcium sand 8-10%; 3-5mm magnesia-calcium sand 9-18%; 1 -3mm magnesia calcium sand 10-22%; 0.5-1mm fused calcium zirconate 5-10%; 0.5-1mm magnesia 5-10%; 600 mesh fused calcium zirconate 3-10%; ≤0.5 mm magnesia 15-24%; large crystal magnesia 3-10%; binder 1-3%; sintering agent 1-2%.

[0030] The binding agent is made by dehydrating paraffin wax.

[0031] The sintering agent can be selected from any of the following materials: aluminum oxide, titanium oxide, boron oxide, and cerium oxide.

[0032] Prepare this high-quality dolomite-periclase-calcium zirconate composite refractory material based on 1000 kg of refractory material, the steps are as follows:

[0033] 1) Material preparation: The magnesia-calcium sand is mechanically crushed through the jaw crusher, the roller crusher, and the cone crusher in sequ...

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Abstract

The invention relates to a high-quality dolomite-periclase-calcium zirconate composite fireproof material suitable for smelting stainless steel, special steel AOD furnace and refining ladles. The adopted raw materials mainly comprise, by weight, 8-10% of magnesium calcium sand with a particle size of 5-8 mm, 9-18% of magnesium calcium sand with a particle size of 3-5 mm, 10-22% of magnesium calcium sand with a particle size of 1-3 mm, 5-10% of calcium zirconate with a particle size of 0.5-1 mm, 5-10% of magnesia with a particle size of 0.5-1 mm, 3-10% of 600 mesh electric melting calcium zirconate, 15-24% of magnesia with a particle size of less than or equal to 0.5 mm, 3-10% of 400 mesh 98 large crystal magnesia, 1-3% of a binding agent, and 1-2% of a sintering agent, wherein the raw materials are subjected to mixing, molding, sintering, finished product inspection, package and other steps to prepare the material.

Description

technical field [0001] The invention relates to the field of refractory materials for smelting, in particular to a dolomite-periclase-calcium zirconate composite refractory material suitable for smelting stainless steel and special steel in an AOD furnace and a refining ladle and a preparation method thereof. Background technique [0002] At present, the domestic AOD furnace for smelting stainless steel and special steel and one of the refractory materials for refining ladles are magnesia-calcium bricks. Poor hydration resistance and poor thermal shock stability; no corrosion resistance and poor erosion resistance. At the same time, the market competition is becoming more and more fierce, and the price of bricks is getting lower and lower. Therefore, there is a need for a high-quality dolomite-periclase-calcium zirconate composite refractory material that overcomes the above-mentioned shortcomings in performance, can reduce the firing temperature, save energy, and has low c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王树山杨毅刘冲付伟
Owner LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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