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Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof

A magnesia spinel and magnesia-aluminum spinel technology, applied in the field of anti-slag erosion magnesia spinel brick and its preparation, can solve the problems of pollution, air pollution, health hazards, etc., and achieve increased viscosity and thermal shock stability. Improved performance and improved thermal shock stability

Inactive Publication Date: 2016-05-18
LUOYANG LIER REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the refractory materials used in refining furnaces are mainly magnesia-chrome bricks. Since this product contains chromium oxide, under high temperature, oxidizing atmosphere or alkaline conditions, the Cr in it 3+ will convert to Cr 6+ , while Cr 6+ Soluble in water, another Cr 6+ It can also exist in the gaseous phase. During the production process, it will be discharged into the atmosphere with the flue gas to pollute the air, thereby causing very serious pollution to the environment such as water sources, the atmosphere, and soil. It becomes a super carcinogen and has a serious impact on human health. more serious hazard

Method used

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  • Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof
  • Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4

[0042] Table 1 Embodiment 1~4 raw material ratio table (weight percentage)

[0043]

Embodiment 1

[0044] Embodiment 1~4 gained product and the Cr26 (being Cr 2 o 3 mass percentage) magnesia-chrome bricks, the comparative test results are shown in Table 2, wherein, the carbon-containing admixture used in Example 1 is thermoplastic phenolic resin, and the dosage is 3.5% of the total components of magnesia spinel bricks. 2. The carbon-containing admixture used is modified asphalt resin, and the dosage is 3.5% of the total components of the magnesia spinel brick. The carbon-containing admixture used in Example 3 is thermosetting phenolic resin and modified asphalt resin, and the dosage is 3.5% of the total amount of each component of magnesia spinel brick, the carbon-containing admixture adopted in embodiment 4 is thermosetting phenolic resin, thermoplastic phenolic resin and modified pitch resin, and the amount is 3.5% of the total amount of each component of magnesia spinel brick 3.5%.

[0045] Table 2 Comparison of performance indicators between the products of Examples 1...

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Abstract

The invention provides a slag-corrosion-resistant magnesite-spinel brick and a preparation method thereof and relates to a slag-corrosion-resistant magnesite-spinel brick. The slag-corrosion-resistant magnesite-spinel brick is prepared from, by mass, 61-81% of fused magnesite particles and fine powder, 0-8% of magnesium aluminate spinel particles, 3-10% of magnesium aluminate spinel fine powder, 2-8% of aluminum powder, 0.5-3% of titanium dioxide, 0.5-10% of zirconium oxide fine powder and 0.1-0.5% of yttrium oxide powder. The slag-corrosion-resistant magnesite-spinel brick is obtained through the steps of material preparation, premixing of materials, mixing of the materials and forming. Slag corrosion resistance, high-temperature oxidation resistance and compactness of the magnesite-spinel brick are improved, and accordingly the aim of prolonging the service life of the magnesite-spinel brick is achieved.

Description

【Technical field】 [0001] The invention relates to a magnesia spinel brick for a refining furnace, in particular to a slag erosion-resistant magnesia spinel brick and a preparation method thereof. 【Background technique】 [0002] It is well known that with the progress of the metallurgical industry and the continuous adjustment and optimization of the structure of steel products, my country's demand for high-quality steel products has further increased. Refining furnace steelmaking has been vigorously promoted and applied as a cost-effective out-of-furnace refining method. Correspondingly, higher requirements are put forward for refractory materials used in refining furnaces. [0003] At present, the refractory materials used in refining furnaces are mainly magnesia-chrome bricks. Since this product contains chromium oxide, under high temperature, oxidizing atmosphere or alkaline conditions, the Cr in it 3+ will convert to Cr 6+ , while Cr 6+ Soluble in water, another Cr 6...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043C04B35/622
CPCC04B35/043C04B35/622C04B2235/3222C04B2235/3225C04B2235/3232C04B2235/3244C04B2235/402C04B2235/80C04B2235/96
Inventor 毕长禄张兴艳焦智宇谢毕强李有奇赵宇杰
Owner LUOYANG LIER REFRACTORY MATERIAL
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