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Nitride aluminum hydrolyzing combined fire-resistant material

A technology of refractory materials and aluminum nitride, applied in the field of refractory materials, can solve the problems of weak bonding force, instability, and inability to be promoted on a large scale, and achieve the effect of easy control of the production process and difficult to melt.

Inactive Publication Date: 2007-09-19
江苏苏嘉集团新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now some people study ρ-Al 2 o 3 Binding, ρ-Al 2 o 3 The combination does not bring in low-melting point substances, but its binding force is weak and unstable, which makes it unable to be promoted on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0025] Formula: 20 parts of tabular corundum (15-5mm), 30 parts of white corundum (1-5mm), 20 parts of white corundum (1-0mm), 7 parts of magnesium oxide (200 mesh), 10 parts of alumina micropowder, nitriding 8 parts of aluminum (200 mesh), 2 parts of ammonia water, 1 part of silicon micropowder, 2 parts of magnesium chloride, plus 3 to 5 parts of water.

[0026] Accurately weigh the materials except water and add them to the mixer → dry mix for 1 minute → add water and stir for 6 minutes to form a castable → pour into the casting mold → vibrate with a vibrating rod to form → demould and dry after 24 hours.

Embodiment 4

[0028] Formula: 45 parts of bauxite (1-5mm), 15 parts of white corundum (1-0mm), 8 parts of platy corundum (200 mesh), 7 parts of white corundum (320 mesh), 10 parts of aluminum-magnesium spinel (5μm) 0.2 parts of aluminum nitride (5μm), 5 parts of magnesium oxide (200 mesh), 5.3 parts of alumina micropowder, 1 part of ADS, 0.5 part of sodium hexametaphosphate, 1.5 parts of silicon micropowder, 1.5 parts of dextrin, and 5 parts of water ~7 servings.

[0029] White corundum (320 mesh), aluminum-magnesium spinel (5 μm), magnesia (200 mesh), and alumina micropowder were put into a ball mill and ground for 30 minutes to form a premix bag for subsequent use; add bauxite ( 1~5mm), white corundum (1~0mm), tabular alumina (200 mesh), sodium hexametaphosphate, ADS, silicon micropowder, dextrin aluminum nitride (5μm) → dry mix for 2 minutes → add water and stir for 5 minutes → Add the premix and stir for 10 minutes → Make a spread or knot.

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PUM

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Abstract

A fire resisting material combining with aluminium nitride hydrolysis belongs to a fire resisting material with the following components: 87-99 shares of primary fire resisting material with a high melting point, 0.2-8 shares of aluminium nitride, 0.02-5 shares of additive; adding 2-7 shares of water (relative to the total dosage) and blending during construction and solidifying and combining of the fire resisting material in virtue of the hydrolysis reaction of the aluminium nitride. The filling compound is independent with the cement, phosphate and silica micropowder. The fire resisting material is solidified and combined by aluminium nitride hydrolysis to produce AlOOH, Al(OH)3 and consuming water. The filling compound has excellent anti-erosion capacity and elevated temperature strength because it avoids the effects of cement, phosphate and silica micropowder to the elevated temperature.

Description

technical field [0001] The invention belongs to a refractory material, in particular to an aluminum nitride hydrolysis bonded refractory material. Background technique [0002] Refractory castables are mainly used in the manufacture of refractory parts for steelmaking, such as ladle lining, nozzle seat bricks, ventilation bricks, ventilation plugs, steelmaking electric furnace bottom electrode cover bricks and other parts. Most of the currently used aluminum-magnesium spinel refractory materials are combined with cement, phosphate, and silicon micropowder. Cement, phosphate, silica powder will affect the high temperature performance of refractories. Now some people study ρ-Al 2 o 3 Binding, ρ-Al 2 o 3 Combination does not bring in low-melting point substances, but its binding force is weak and unstable, which makes it unable to be popularized on a large scale. Aluminum nitride has high bonding and solidification strength, good predictability, and also does not bring in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B14/30C04B14/32
Inventor 张雪松俞晓东朱光永
Owner 江苏苏嘉集团新材料有限公司
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