Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof

A refractory material, magnesium aluminum spinel technology, applied in the field of aluminum-spinel-corundum composite refractory materials and its preparation, can solve the problems of reduced durability, reduce energy consumption, enhance corrosion resistance, reduce resistance The effect of material waste and consumption

Active Publication Date: 2012-08-08
江苏诺明高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The durability of these refractory materials has been found to decrease after use, an...

Method used

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  • Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof
  • Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof
  • Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The raw materials are weighed according to the formula in Table 2, and the particle size gradation of each raw material is as follows:

[0037] 4-1mm coarse particle size 45~50wt%;

[0038] 15-25wt% of particles with a medium size of 1-0.088mm;

[0039] ≤0.088mm fine powder 30~35wt%.

[0040] The aluminum-spinel-corundum composite refractory samples were prepared as follows:

[0041] Aluminum-spinel-corundum composite refractory

[0042] (1) ingredients: weigh the required raw materials according to the proportioning in Table 2;

[0043] (2) Kneading: premix the raw material fine powder with a size of ≤0.088mm for 25-35min, pour the raw material (ie aggregate) with a particle size larger than 0.088mm into the roller mill and mix evenly, stop stirring after 15min, and combine the inorganic Pour in half of the agent, continue stirring for 15min, pour the pre-mixed fine powder into the roller mill and stir for 15min, then pour all the remaining binder and continue stir...

Embodiment 2

[0055] The preparation method is the same as that of Example 1, and the aluminum-spinel-corundum composite refractory is produced according to the formula shown in Table 4, and the routine physical and chemical property testing is shown in Table 5.

[0056] Table 4

[0057]

[0058] table 5

[0059]

[0060] It can be seen from Table 5 that the apparent porosity of the material is relatively low when the spinel content is 15-20%, but the difference is not significant.

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Abstract

The invention belongs to the field of refractory materials, and discloses an aluminum-spinel-corundum composite refractory material and a preparation method as well as application thereof. The aluminum-spinel-corundum composite refractory material comprises raw materials consisting of one or more of the following materials in percentage by weight and an inorganic binding agent: 1-15 percent of metal aluminum powder, 5-25 percent of magnesium-aluminum spinel and 73-90 percent of white corundum or plate-like corundum, wherein the amount of the inorganic binding agent is 1.5-3 percent of the total weight of the raw materials. The aluminum-spinel-corundum composite refractory material can be applied to preparing an RH (Ruhrstahl-Heraeus) refining furnace lining. According to the invention, the corundum, the spinel and the metal aluminum are used as raw materials; chromium pollution and carbon pollution are not introduced in a secondary refining process; the melting point of added metal aluminum is low; the aim of enhancing the corrosion resistance of the material is fulfilled by introducing a soft transition plastic phase matrix into the material and controlling the content of the transition plastic phase matrix; high-temperature firing is not required; the energy consumption is reduced; the cost is saved; the production period is shortened; and the quality and the life of a product are improved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to an aluminum-spinel-corundum composite refractory material and a preparation method and application thereof. Background technique [0002] RH refining furnace has the characteristics of high efficiency, low equipment investment and good metallurgical effect, and is widely used in the smelting of high-quality clean steel and ultra-low carbon steel at home and abroad. However, the service life of the refractory lining for RH refining has not been high, and it occupies a large share of the production cost. The main reasons are: ① high refining temperature outside the furnace; ② slag penetrates into the refractory material and reacts with it, resulting in thermal spalling and structural spalling; ③ blowing O 2 Or Ar gas, or electromagnetic stirring, make the molten steel and slag violently agitate, so that the refractory material is strongly scoured by the molten steel, so that the ...

Claims

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Application Information

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IPC IPC(8): C04B35/66F27D1/00
Inventor 高原钱志明黄京衡马国栋刘亚勤张军杰宋士佳王丽君
Owner 江苏诺明高温材料股份有限公司
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