Method for preparing castable materials

A castable and raw material technology, applied in the field of refractory materials, can solve the problems of poor resistance to aluminum liquid wettability, unqualified aluminum alloy product composition, easy to pollute the aluminum liquid composition, etc., and achieves good anti-aluminum wettability and aluminum Good liquid erosion performance, improving the effect of not being wetted by aluminum liquid

Active Publication Date: 2014-09-10
南通新兴机械制造有限公司
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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 con...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: A casting material consists of 8mm-0mm corundum particles 69wt%, 4 0.4wt%, TiB 2 0.2wt%, SrTiO 3 0.2wt%, Na3AlF6 0.2wt%); and add 0.12% sodium tripolyphosphate and 0.03% polycarboxylate as dispersant in the total weight of the raw materials; when preparing, firstly mix the anti-aluminum liquid wetting agent and the particle size <0.044 The aluminum nitride fine powder raw material of mm is 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 wetted by the anti-aluminum liquid The proportion of aluminum nitride fine powder and aluminum nitride refractory castables in aluminum nitride refractory castables is 22wt%, mixed evenly with other components, and about 5wt% aluminum sol is added during construction and stirring, mixed evenly, vibrating pouring at the furnace site, conventional Use after curing. ...

Embodiment 2

[0014] Example 2: A castable consists of 8mm-0mm corundum particles 66wt%, 4 1.6wt%, TiB 2 0.8wt%, SrTiO 3 0.8wt%, Na3AlF6 0.8wt%); and add 0.12% sodium tripolyphosphate and 0.03% polycarboxylate as dispersants; the preparation process is the same as in Example 1, and about 6wt% aluminum is added during construction and stirring Colloidal sol, kneaded evenly, vibrating poured on the furnace site, used after conventional curing and baking.

Embodiment 3

[0015] Example 3: A castable consists of 8mm-0mm corundum 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 fireproof materials, and relates to a method for preparing silicon carbide castable materials resistant to molten aluminum wetting. The castable materials comprise, by weight, 63% to 69% of corundum particles with the sizes ranging from 8 mm to 10 mm, 18% to 21% of aluminum nitride fine powder with the particle sizes smaller than 0.044 mm, 4% to 7% of pure calcium aluminate cement with the particle sizes smaller than 0.074 mm, 5% to 6% of silicon dioxide fine powder with the D90 equal to 0.1 micrometer, 1% to 6% of the combination of BaSO4, TiB2, SrTiO3 and Na3AlF6, 0.12% of sodium tripolyphosphate and 0.03% of sodium hexametaphosphate, wherein the combination is used as molten aluminum wetting resistant agents, the sodium tripolyphosphate and the sodium hexametaphosphate are added to serve as dispersing agents, and alumina sol serves as construction liquid. The castable materials prepared with the method have the sufficient strength, are excellent in thermal shock resistance, good in size stability and good in chemical stability, most importantly, are resistant to molten aluminum wetting, good in thermal stability, resistant to molten aluminum erosion, free of influencing molten aluminum ingredients and long in service life.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a preparation method of a pouring material that resists the wetting of molten aluminum. 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 fluidity....

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 汤炼芳
Owner 南通新兴机械制造有限公司
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