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Preparation method of fused silica refractory casting material unwetted by aluminum liquid

A refractory castable, fused silica technology, applied in the field of refractory materials, can solve the problem of high content, achieve the effect of stable lining volume, reduce loss and improve strength

Active Publication Date: 2010-06-16
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But fused silica castable SiO 2 High content, easy to react with various elements in molten aluminum, resistance to infiltration of molten aluminum needs to be improved

Method used

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  • Preparation method of fused silica refractory casting material unwetted by aluminum liquid
  • Preparation method of fused silica refractory casting material unwetted by aluminum liquid
  • Preparation method of fused silica refractory casting material unwetted by aluminum liquid

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Embodiment Construction

[0029] The present invention is described in conjunction with accompanying drawing and specific embodiment, but not limited to following embodiment:

[0030]Table 1 provides the performance index of the main raw materials used, Table 2-3 provides the specific ratio of raw materials for Examples 1-8 and comparative castables 1-2, Table 4-5 provides Examples 1-8 and comparison Ratio 1~2 performance indicators of castables.

[0031] When preparing the fused silica refractory castable that is not wetted by the aluminum liquid, as in the preparation method of Example 2, the compound anti-aluminum liquid wetting agent and ≤0.044mm white corundum powder are co-ground at a ratio of 1:15 (mass ratio) for 30 minutes , to prepare a co-grinding powder with uniform composition; then prepare a castable according to the formula ratio of Example 2, wherein the composite anti-aluminum liquid wetting agent and ≤0.044mm white corundum powder are added in the form of co-grinding powder, which is ...

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Abstract

The invention belongs to the field of refractory materials and discloses a preparation method of a fused silica refractory casting material unwetted by an aluminum liquid, which comprises the following step of: enhancing a ground substance by adopting 10-20wt% of white alundum powder, 4-8wt% of calcium aluminate cement, 3-5wt% of hydrated alumina compound binding agent, 4-10wt% of silicon oxide micropowder and 3-6wt% of alumina micropowder, wherein 60-70wt% of fused silica is used as a main material, BaSO4 and Na3AlF6 is adopted as a compound aluminum liquid anti-wetting agent with the addition of 1-6wt%, and additional 0.12wt% of trimeric sodium phosphate and additional 0.03wt% of sodium hexametahposphate are adopted as dispensing agents. The casting material prepared by using the method has high strength, is unwetted by the aluminum liquid, has the highest use temperature of 1000 DEG C and can be used as the refractory materials, such as an aluminum flowing groove of an aluminum smelting furnace and the like.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a method for preparing a fused silica refractory castable that is not wetted by aluminum liquid. Background technique [0002] The melting point of molten aluminum itself is about 660°C. The temperature of molten aluminum and aluminum alloying in the aluminum smelting furnace is 700-900°C. Magnesium, silicon, and zinc in aluminum and its aluminum alloys are highly active and are easily mixed with refractory materials. Some of the elements react to be contaminated by refractory materials. Therefore, it is required that the refractory materials in contact with molten aluminum should have good chemical stability. [0003] 3SiO 2 +4Al(l)→2Al 2 o 3 +3Si(s) [0004] At 850°C: ΔG=-509.6KJ / mol [0005] 3(3Al 2 o 3 2SiO2 2 )+8Al(l)→13Al 2 o 3 +6Si(s) [0006] At 850°C: ΔG=-986.4KJ / mol [0007] Metal aluminum and aluminum alloys not only have high chemical activity, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/14
Inventor 胡书禾张三华王战民曹喜营李红霞李少飞刘子耘
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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