Aluminium liquid infiltration-resistant high-aluminum plastic material and preparation method

An anti-aluminum liquid and plastic technology, applied in the field of refractory materials, can solve the problems of plastic and aluminum liquid wetting, etc., to improve the anti-aluminum liquid wetting agent and corrosion, improve wettability, The effect of increasing the wetting angle

Active Publication Date: 2010-06-16
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Aluminium liquid infiltration-resistant high-aluminum plastic material and preparation method
  • Aluminium liquid infiltration-resistant high-aluminum plastic material and preparation method

Examples

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Embodiment 1

[0020] Embodiment 1: fine powder and aggregate all adopt the bauxite of pickling, in described bauxite, Al 2 o 3 The content is 85-90wt%, and the bulk density is 3.15-3.30g / cm 3 ; wherein the percentage of particle size is 5-0.088mm is 55wt%, particle size is less than 0.088mm fine powder part is 30wt%. The additives are mainly 3wt% of silica powder 80-120 mesh, 2wt% of active α-alumina micropowder, 6wt% of sodium bentonite and 3wt% of Jilin ash clay, and 1wt% of anti-aluminum liquid wetting agent (BaSO 4 0.8wt%, Na 3 AlF 6 0.2wt%), the added inhibitor oxalic acid is 1wt%, and the added binding agent is 75% phosphoric acid solution 10wt%. During preparation, the anti-aluminum liquid wetting agent and high-alumina fine powder were co-milled in a vibration mill for 20 minutes according to the ratio described in the examples, so that the anti-aluminum liquid wetting agent and high-alumina fine powder were fully homogenized in advance; the homogenized powder According to the ...

Embodiment 2

[0021] Embodiment 2: preparation process is the same as embodiment 1, and its raw material addition is different, and promptly fine powder and aggregate all adopt the bauxite through pickling, and Al in described bauxite 2 o 3 The content is more than 70wt%; wherein the percentage of the particle size is 5-0.088mm is 50wt%, and the particle size is less than 0.088mm fine powder part is 15wt%. The additives are mainly 5wt% of silica powder 80-120 mesh, 11wt% of active α-alumina micropowder, 9wt% of sodium bentonite and 5wt% of Jilin ash clay, 5wt% of anti-aluminum liquid wetting agent (BaSO 4 4wt%, Na 3 AlF 6is 1wt%), add inhibitor oxalic acid 2wt%, add binding agent is 75% phosphoric acid solution 12wt%, wherein homogenized powder co-grinding time is 25 minutes, trapped material time is 36 hours.

Embodiment 3

[0022] Embodiment 3: The preparation process is the same as that of Example 1, with different amounts of raw materials added. The fine powder and aggregate are all pickled brown corundum, and Al in the brown corundum 2 o 3 The content is not less than 94.5%, and the bulk density is greater than 3.9g / cm 3 Wherein the percentage of particle size 5-0.088mm is 60wt%, particle size is less than 0.088mm fine powder part is 21wt%. The additives are mainly 3wt% of silica powder 80-120 mesh, 2wt% of active α-alumina micropowder, 9wt% of sodium bentonite and 3wt% of Jilin ash clay, and 2wt% of anti-aluminum liquid wetting agent (BaSO4 1.6wt%, Na 3 AlF 6 0.4wt%), add inhibitor oxalic acid 1wt%, add binding agent 75% phosphoric acid solution 8wt%, wherein the co-grinding time of the homogenized powder is 30 minutes, and the trapping time is 48 hours.

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Abstract

The invention discloses an aluminium liquid infiltration-resistant high-aluminum plastic material and a preparation method, and the high-aluminum plastic material comprises the following raw materials by mass percent: 50-60wt% of high-aluminum granule of which the grain size is 5-0.088mm after pickling, 15-30wt% of high-aluminum fine powder of which the grain size is less than 0.088mm after pickling, 3-8% of fraxinus mandshurica clay, 3-9% of sodium bentonite, 2-11% of active alpha-alumina micro powder, 3-5% of silica powder, 1-6% of anti-aluminium liquid wetting agent formed by compounding BaSO4 and Na3AlF6, phosphoric acid with the concentration of 75% and oxalate, wherein the high-aluminium granule and the high-aluminium fine powder are respectively one of alumina, fused brown corundum, fused white alumina, dense fused corundum, tabular alumina and mullite with the content of Al2O3 being greater than 70%. The high-aluminum plastic material in the invention has the advantages of aluminium liquid infiltration resistance, long retention period and convenient construction.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a high-alumina plastic that resists the infiltration of molten aluminum and a preparation method. Background technique [0002] The temperature of aluminum liquid and aluminum alloying in the aluminum smelting furnace is only 700-900°C, but the magnesium, silicon and zinc in aluminum and its aluminum alloys are very active, and they are easy to react with some elements in the refractory material and be affected by the fire resistance. Material contamination. Therefore, it is required that the refractory materials in contact with molten aluminum should have good chemical stability. Metal aluminum and aluminum alloys not only have high chemical activity, but also have excellent fluidity of the melt. The viscosity of the aluminum melt at 750°C is only 0.104Pa·s, which is equivalent to the viscosity of water at 20°C (0.1Pa·s). close, which makes it easy to penetrate into th...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 石会营王战民张三华胡芳军曹喜营李红霞顾忠宇
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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