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A kind of preparation method of aluminum nitride castable anti-aluminum liquid wetting

An anti-aluminum liquid and aluminum nitride technology, applied in the field of refractory materials, can solve the problems of poor anti-aluminum liquid wettability, easy pollution of aluminum liquid components, unqualified aluminum alloy product components, etc., and achieves good anti-aluminum wettability. , Improve the effect of not being wetted by molten aluminum and having good corrosion resistance to molten aluminum

Active Publication Date: 2015-12-09
广东鸿劲金属铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing materials in this part have poor wettability against aluminum liquid, and are easy to contaminate the composition of aluminum liquid, resulting in unqualified composition of aluminum alloy products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: The anti-aluminum liquid wetting aluminum nitride castable consists of 8mm-0mm aluminum nitride particles 69wt%, 4 0.4wt%, TiB 2 0.2wt%, SrTiO 3 0.2wt%, Na 3 AlF 6 0.2wt%); and add 0.12% of sodium tripolyphosphate and 0.03% of polycarboxylate as dispersants in the total weight of raw materials; when preparing, firstly, anti-aluminum liquid wetting agent and aluminum nitride with a particle size of <0.044mm The fine powder raw materials are co-milled in a vibration mill for 30mins; the anti-aluminum liquid wetting agent and aluminum nitride fine powder are fully homogenized in advance to make a homogenized powder, and then the homogenized powder is mixed with the anti-aluminum liquid wetting agent and aluminum nitride The proportion of fine powder in aluminum nitride refractory castables, that is, 22wt%, is mixed with other components evenly, and about 5wt% aluminum sol is added during construction and stirring, and the mixing is uniform. Vibration pouring i...

Embodiment 2

[0014] Example 2: The anti-aluminum liquid wetting aluminum nitride castable consists of 8mm-0mm aluminum nitride particles 66wt%, 4 1.6wt%, TiB 2 0.8wt%, SrTiO 3 0.8wt%, Na 3 AlF 6 0.8wt%); and add 0.12% sodium tripolyphosphate and 0.03% polycarboxylate as dispersant in the total weight of raw materials; the preparation process is the same as in Example 1, and about 6wt% aluminum sol is added during construction and stirring, and the mixing is uniform , vibrated pouring at the furnace site, and used after conventional curing and baking.

Embodiment 3

[0015] Example 3: The anti-aluminum liquid wetting aluminum nitride castable consists of 8mm-0mm aluminum nitride particles 65wt%, 4 1.6wt%, TiB 2 0.8wt%, SrTiO 3 0.8wt%, Na 3 AlF 6 0.8wt%); and add 0.12% sodium tripolyphosphate and 0.03% polycarboxylate as dispersant in the total weight of raw materials; the preparation process is the same as in Example 1, and about 8wt% aluminum sol is added during construction and stirring, and the mixing is uniform , vibrated pouring at the furnace site, and used after conventional curing and baking.

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Abstract

The invention belongs to the field of refractory materials and relates to a preparation method of a molten aluminum wetting resistant aluminium nitride castable. The castable comprises the following raw materials by weight percent: 63-69wt% of aluminium nitride particles with sizes of 8-0mm, 18-21wt% of aluminium nitride fine powder with particle size less than 0.044mm, 4-7wt% of pure calcium aluminate cement with particle size less than 0.074mm and 5-6wt% of silicon dioxide micro powder with D90 equivalent to 0.1mu m. The castable is characterized in that a compound of BaSO4, TiB2, SrTiO3 and Na3AlF6 is adopted as a molten aluminum wetting resisting agent; the addition of the compound is 1-6wt%; 0.12% of sodium tripolyphosphate and 0.03% of sodium hexametaphosphate are added as dispersing agents; alumina sol serves as construction liquid. The prepared castable has enough strength, excellent thermal shock resistance and good volume stability and chemical stability, is mainly resistant to molten aluminum wetting, has good thermal stability, is resistant to molten aluminum corrosion, does not affect the components of molten aluminium and has long service life.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a preparation method of an aluminum nitride castable resistant to aluminum liquid wetting. Background technique [0002] The production of large-scale aluminum alloy ingots in the non-ferrous industry, as well as the further processing of aluminum strips, aluminum foils and other products require high precision in the control of aluminum alloy components. As the key equipment of the aluminum alloy deep processing project, the lining material of the large-scale aluminum smelting furnace, especially the lining material used at the bottom of the aluminum inlet inclined groove, the side wall and the throat of the aluminum smelting furnace, plays an important role in controlling the composition of the aluminum alloy. play an important role. Liquid aluminum not only contains elements such as magnesium, silicon and zinc with high chemical activity, but also has excellent fluidi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/581
Inventor 施丽娜
Owner 广东鸿劲金属铝业有限公司
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