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Al-C fireproof material for continuous casting and its production method

A refractory material, aluminum carbon technology, applied in the field of refractory materials, can solve the problems of corrosion resistance, poor stability of aluminum carbon, etc., achieve cost increase, improve performance-price ratio, thermal shock stability and erosion resistance performance improvement Effect

Inactive Publication Date: 2004-03-31
山东淄川特种耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a refractory material for aluminum-carbon continuous casting and its preparation method, which solves the shortcomings of poor stability and corrosion resistance of aluminum-carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 A submerged nozzle for aluminum-carbon continuous casting, containing 4% boron nitride and 3% silicon carbide by weight in the raw material, it adopts the following weight preparation raw materials: fused white corundum 120Kg, graphite 40Kg, Zirconium mullite 20Kg, industrial silicon 6Kg, silicon carbide 6Kg, boron nitride 8Kg; wherein graphite is graphite with a fixed carbon content of 98%, and boron nitride is hexagonal boron nitride, which is prepared by the following method: Proportion Mix white corundum, graphite, zirconium mullite, silicon carbide, industrial silicon and boron nitride with 4Kg of solid phenolic resin and 30Kg of liquid phenolic resin, and use isostatic pressing to form at a molding pressure of 120Mpa. After 10 minutes, the molded green body is fired at a temperature of 1280° C. for 70 hours after being dried.

Embodiment 2

[0015] Example 2 A shroud for aluminum-carbon continuous casting, containing 5% boron nitride and 1% silicon carbide by weight in the raw material, which adopts the following weight to prepare raw materials: 110Kg of fused white corundum, 54Kg of graphite, zirconium Mullite 14Kg, industrial silicon 10Kg, silicon carbide 2Kg, boron nitride 10Kg; Wherein graphite is the graphite that fixed carbon content is 99%, and boron nitride is hexagonal system boron nitride, adopts following method to prepare: according to above-mentioned weight formula Mix white corundum, graphite, zircon mullite, silicon carbide, industrial silicon and boron nitride evenly with 12Kg of solid phenolic resin and 10Kg of liquid phenolic resin, and form it by isostatic pressing with a forming pressure of 150Mpa and maintain a pressure of 20 Minutes, the molded green body is fired at a temperature of 1350°C for 60 hours after drying.

Embodiment 3

[0016] Example 3 A stopper rod for aluminum-carbon continuous casting, the raw material contains 0.5% boron nitride and 1% silicon carbide by weight, and the following weights are used to prepare raw materials: 150Kg of fused white corundum, 30Kg of graphite, zirconium 15Kg of mullite, 2Kg of industrial silicon, 2Kg of silicon carbide, and 1Kg of boron nitride; wherein graphite is graphite with a fixed carbon content of 99.5%, and boron nitride is hexagonal boron nitride, which is prepared by the following method: Mix white corundum, graphite, zirconium mullite, silicon carbide, industrial silicon and boron nitride with 8Kg of solid phenolic resin and 20Kg of liquid phenolic resin, and form it by isostatic pressing with a forming pressure of 150Mpa and maintain a pressure of 20 Minutes, the molded green body is fired at a temperature of 1300°C for 60 hours after drying.

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PUM

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Abstract

A fireproof material containing aluminum and carbon for continuous casting. Taking aluminum oxide and carbon as the main components, it includes 0.5í½5.0úÑ boron nitride and 1.0í½5.0úÑ carborumdum by weight. The preparation method thereof comprises mixing white alundum, graphite, zirconium mullite, carborundum, industrial silicon ,2.0úÑ??.0úÑ solid phenol resin and 5úÑí½15úÑ liquid phenol resinby weight, and moulding at equal static pressure of 120í½150Mpa for 10-20 min, the moulded semi-product is dried and burned at 1280í½1350degree C for 60-70 hours. The product is suitable for columns of sagger, downspouts, with good heat-shock stability and resistibility of erosion.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to an aluminum-carbon continuous casting refractory material containing boron nitride and silicon carbide components. Background technique [0002] Aluminum carbon refractories are based on Al 2 o 3 The refractory material with +C as the main component, because its oxidation resistance is obviously better than that of magnesia carbon bricks, Na 2 O series slag has excellent erosion performance and is widely used in functional refractory materials for continuous casting of iron and steel. Such as draft tubes for injecting molten metal from reusable or intermittently used ladles into the tundish, submerged nozzles for introducing molten metal from the tundish to the crystallizer, and controls for the flow of molten metal stopper etc. When pouring steel, the submerged nozzle for continuous casting must not only have good thermal shock resistance, be able to resist sudden tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00C04B35/103C04B35/106C04B35/66
Inventor 宋爱谋
Owner 山东淄川特种耐火材料有限公司
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