Preparation method of low-carbon aluminum-carbon refractory material for use in continuous casting

A technology of refractory material and low carbon aluminum, applied in the field of refractory materials, can solve the problems of difficult dispersion, high temperature strength of refractory materials, limited improvement in oxidation resistance and slag erosion resistance, etc., and achieves low decarburization layer thickness, small erosion Depth, the effect of improving high temperature strength

Active Publication Date: 2014-06-25
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The inventors have found out how adding certain chemicals called Poly boron silazanes (PBS) into specific types of refractile metals like Al2O3 or graphite could make them stronger at higher temperatures than unadded PBS alone. This improvement was observed even for lower carbons containing these compounds due to their ability to form strong covalently bonded layers between atoms within each molecule instead of just one atom per unit cell. These improvements were also shown on continuously cast products made by melting this type of metal while still hot.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding ways to improve the properties of alloys containing different types of metals like iron or coke without adding any other substances with negative impact upon their performance at higher temperatures.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, 5% polyborosilazane by mass is added to the phenolic resin. After mixing evenly, it is added to the aluminum-carbon refractory raw material. In the aluminum-carbon refractory raw material, alumina is 94wt%, graphite is 6wt%, and phenolic resin is added. , is 6wt% of the weight of the aluminum-carbon refractory raw material. After kneading, 120MPa pressure isostatic pressing, under nitrogen atmosphere (nitrogen content greater than 99.99%), heated to 1200°C at a heating rate of 1°C / min, and kept for 5 hours.

Embodiment 2

[0029] In this example, 7% polyborosilazane by mass is added to the phenolic resin. After mixing evenly, it is added to the aluminum-carbon refractory raw material. In the aluminum-carbon refractory raw material, alumina is 94wt%, graphite is 6wt%, and phenolic resin is added , is 6wt% of the weight of the aluminum-carbon refractory raw material. After kneading, 120MPa pressure isostatic pressing, under nitrogen atmosphere (nitrogen content greater than 99.99%), heated to 1200°C at a heating rate of 1°C / min, and kept for 5 hours.

Embodiment 3

[0031] In this example, 5% polyborosilazane by mass is added to the phenolic resin. After mixing evenly, it is added to the raw material of aluminum-carbon refractory material. In the raw material of aluminum-carbon refractory material, alumina is 97wt%, graphite is 3wt%, and phenolic resin is added , which is 4wt% of the weight of the aluminum-carbon refractory raw material. After kneading, 120MPa pressure isostatic pressing, under nitrogen atmosphere (nitrogen content greater than 99.99%), heated to 1200°C at a heating rate of 1°C / min, and kept for 5 hours.

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Abstract

The invention belongs to the technical field of refractory materials, and mainly provides a preparation method of a low-carbon aluminum-carbon refractory material for use in continuous casting. Polyborosilazane is taken as an additive, so that the high-temperature strength, oxidation resistance and erosion resistance of the low-carbon aluminum-carbon refractory material are improved; phenolic resin is taken as a bonding agent, and the adding amount of the phenolic resin is 4-6 percent by weight based on the total weight of the raw materials of the low-carbon aluminum-carbon refractory material; polyborosilazane is added into phenolic resin, and the adding amount of polyborosilazane is 3-7 percent by mass of phenolic resin. By adopting the method, the high-temperature strength, oxidation resistance and slag erosion resistance of a continuous cast low-carbon refractory material can be improved remarkably.

Description

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Claims

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Application Information

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Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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