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

CN105585322AInactive Publication Date: 2016-05-18LUOYANG LIER REFRACTORY MATERIAL
3 Cites 21 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-05-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

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...