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Method for preparing pouring material for aluminum smelting

一种铝浇注、浇注料的技术，应用在耐火材料领域，能够解决抗铝液润湿性差、易污染铝液成分、铝合金产品成分不合格等问题，达到抗铝液润湿性好、提高不被铝液润湿性、抗铝液侵蚀性能好的效果

Inactive Publication Date: 2016-01-27
汤炼芳
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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: A casting material consists of 8mm-0mm corundum particles 69wt%, 4 0.4wt%, TiB 2 0.2wt%, SrTiO 3 0.2wt%, Na3AlF60.2wt%); and add 0.12% sodium tripolyphosphate and 0.03% polycarboxylate as dispersants accounting for the total weight of raw materials; when preparing, first wetting the anti-aluminum liquid 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 with other components evenly, and about 5wt% aluminum sol is added during construction and stirring, and mixed evenly. 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%, Na3AlF60.8wt%); 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 refractory materials and relates to a method for preparing a pouring material for aluminum smelting. The pouring material comprises components of raw materials in percentage as follows: 69wt% of corundum particles of 0 mm-8 mm, 21wt% of aluminum nitride powder smaller than 0.044 mm, 4wt% of pure calcium aluminate cement smaller than 0.074 mm and 5wt% of silica micropowder with D90 equal to 0.1 mu m; BaSO4, TiB2, SrTiO3 and Na3AlF6 are compounded to be used as a molten aluminium wetting resisting agent, the addition amount of the agent is 1wt%, sodium tripolyphosphate accounting for 0.12% of the total weight of the raw materials and polycarboxylate accounting for 0.03% of the total weight of the raw materials are added to be used as dispersing agents, and aluminum sol is used as a construction liquid. The pouring material prepared with the method has the sufficient strength, the excellent thermal shock resistance, the good volume stability and the good chemical stability, and the key is that the pouring material is resistant to molten aluminium wetting, good in thermal stability and resistant to molten aluminium corrosion, does not affect components of molten aluminium and has the long service life.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a method for preparing castables used in the aluminum smelting industry. 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 ...

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 汤炼芳
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