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Preparation method of seepage-proof castable

A castable and anti-seepage agent technology, which is applied in the field of refractory materials, can solve the problems of furnace lining damage, easy pollution of molten aluminum components, and poor wettability of molten aluminum, so as to improve strength, improve wettability by molten aluminum, Good effect of anti-aluminum wettability

Active Publication Date: 2014-09-17
秦皇岛市首耐新材料有限公司
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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 components of aluminum liquid. The aluminum liquid penetrates into the refractory material and the furnace lining is damaged.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: An anti-seepage castable is composed of 8mm-0mm bauxite 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 dispersants in the total weight of raw materials; when preparing, firstly mix anti-seepage agent and nitrogen with particle size <0.044mm The aluminum fine powder raw material is co-milled in a vibration mill for 30mins; the anti-seepage agent and aluminum nitride fine powder are fully homogenized in advance to make homogenized powder, and then the homogenized powder is mixed with anti-seepage agent and aluminum nitride fine powder in nitrogen The total proportion of aluminum refractory castables is 22wt%, mixed with other components evenly, and about 5wt% aluminum sol is added during construction and stirring, mixed evenly, vibrating poured at the furnace site, and used after conventional curing and baking.

Embodiment 2

[0016] Example 2: An anti-seepage castable consists of 8mm-0mm alumina 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

[0017] Example 3: An anti-seepage castable consists of 8mm-0mm alumina 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 seepage-proof castable. The castable comprises the following raw materials by weight percent: 63-69wt% of alumina 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 anti-seepage castable. 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. At 750°C, its viscosity is only 0.104...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 汤炼芳
Owner 秦皇岛市首耐新材料有限公司
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