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Method for preparing aluminum-liquid wetting resisting silicon carbide castable

A technology of anti-aluminum and castables, applied in the field of refractory materials, can solve the problems of poor anti-aluminum wettability, unqualified aluminum alloy product composition, easy to pollute the aluminum liquid composition, etc., and achieves excellent thermal shock resistance and service life. Long and volume stability

Active Publication Date: 2012-08-08
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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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 silicon carbide castable is composed of 8mm-0mm silicon carbide particles 69wt%, 4 0.8wt%, Na 3 AlF 6 0.2wt%); and add 0.12% sodium tripolyphosphate and 0.03% sodium hexametaphosphate as a dispersant in the total weight of the raw materials; during preparation, at first the anti-aluminum liquid wetting agent and the silicon carbide fine particle size <0.044mm Co-grind the powder raw materials in the vibration mill for 30mins; make the anti-aluminum liquid wetting agent and silicon carbide fine powder fully homogenized in advance to make homogenized powder, and then mix the homogenized powder with the anti-aluminum liquid wetting agent and silicon carbide fine powder The proportion of silicon carbide refractory castables, 22wt%, is mixed with other components evenly, and about 4wt% of water is added during construction and mixing, and the kneading is uniform. Vibration pouring is performed on the furnace site, and it is used ...

Embodiment 2

[0014] Example 2: The anti-aluminum liquid wetting silicon carbide castable is composed of 8mm-0mm silicon carbide particles 66wt%, 4 3.2 wt%, Na 3 AlF 6 0.8wt%); and add sodium tripolyphosphate and 0.03% sodium hexametaphosphate accounted for raw material gross weight 0.12% as dispersant; preparation process is with embodiment 1, adds about 5wt% water during construction stirring, kneading evenly, It is vibrated and poured at the furnace site, and used after conventional curing and baking.

Embodiment 3

[0015] Example 3: The anti-aluminum liquid wetting silicon carbide castable is composed of 8mm-0mm silicon carbide particles 65wt%, 4 3.2 wt%, Na 3 AlF 6 0.8wt%); and add sodium tripolyphosphate and 0.03% sodium hexametaphosphate as dispersant that account for raw material gross weight 0.12%; preparation process is with embodiment 1, adds about 8wt% water during construction stirring, kneading evenly, It is vibrated and poured at the furnace site, and used after conventional curing and baking.

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Abstract

The invention relates to a method for preparing aluminum-liquid wetting resisting silicon carbide castable, belonging to the field of the refractory material. The silicon carbide castable comprises the following raw materials by weigh percent: 63-69 percent of silicon carbide particles of 0-8 mm, 18-21 percent of fine silicon carbide powder of less than 0.044 mm, 4-7 percent of pure calcium aluminate cement of less than 0.074 mm and 5-6 percent of micro silica powder whose D50 is equal to 0.4 Mum. BaSO4 and Na3AlF6 are compounded to be used as aluminum-liquid wetting resisting agent, and 1-6 percent by weight of the aluminum-liquid wetting resisting agent is added. Sodium tripolyphosphate whose weight is 0.12 percent of the total weight of the raw materials and sodium hexametaphosphate whose weight is 0.03 percent of the total weight of the raw materials are additionally added to be used as dispersant. The silicon carbide castable has sufficient strength, good thermal shock resistance, good volume stability, good chemical stability and long service life and particularly can resist the aluminum-liquid wetting without affecting the components of the aluminum liquid.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a preparation method of a silicon carbide castable 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 foil and other products require high precision in the control of aluminum alloy components. As the key equipment of aluminum alloy deep processing project, the lining material of large-scale aluminum smelting furnace, especially the lining material used in the throat of the aluminum inlet slant groove bottom, side wall and aluminum flow groove of the aluminum smelting furnace, plays an important role in controlling the composition of aluminum alloy. play an important role. Aluminum liquid not only contains elements such as magnesium, silicon and zinc with high chemical activity, but also has excellent flui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/567
Inventor 李少飞王战民张三华李红霞石会营胡书禾张炀
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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