Amorphous boron contained sliding nozzle refractory brick made by combing unfired metal with aluminum, carbon and zirconium materials and production method thereof

Abstract

The invention relates to an amorphous boron contained sliding nozzle refractory brick made by combing unfired metal with aluminum, carbon and zirconium materials and a production method of the amorphous boron contained sliding nozzle refractory brick made by combing the unfired metal with the aluminum, carbon and zirconium materials. Raw materials of the sliding nozzle brick comprise 0.2% to 5% of amorphous boron, 55% to 78% of corundum, 5% to 15% of silicon carbide, 10% to 20% of zirconium mullite, 2% to 5% of graphite, 3% to 7% of aluminum-silicon alloy, 1% to 3% of lithium base bentonite and phenolic resin, and the amount of phenolic resin is 4% to 6% of the total amount of the raw materials. When the sliding nozzle brick is produced, powder and granule are respectively mixed, phenolic resin is added, pug is obtained by evenly mixing, and the sliding nozzle brick is obtained through molding and drying. The sliding nozzle brick possesses excellent inoxidizability and high strength and is good in performance of molten steel erosion resistance, anti-scouring capability, antioxidation, thermal shock resistance and the like. Compared with an unfired aluminum-carbon sliding nozzle brick, a product is excellent in heat shock resistance and anti-erosion performance, is capable of being used in a large-scale steel ladle and is long in service life. The production method of the amorphous boron contained sliding nozzle refractory brick made by combing the unfired metal with the aluminum, carbon and zirconium materials is simplified in process, short in production cycle, free from polluting the environment and good in comprehensive benefits.

Description

technical field [0001] The invention relates to a sliding nozzle refractory material for steelmaking, in particular to a non-fired metal-bonded aluminum-carbon-zirconium sliding nozzle refractory material containing amorphous boron and a production method thereof. Background technique [0002] With the development of steelmaking technology, the requirements for the use of refractory materials for sliding nozzles are becoming increasingly stringent. In order to increase the service life of the sliding nozzle refractory, when the refractory is in contact with the molten material, it is prevented from reacting with the molten material such as molten steel and slag. The damage of sliding nozzle bricks is due to the chemical action of liquid metal and slag, and the physical action of cracks and peeling caused by rapid thermal shock of molten metal and wear of liquid metal. Therefore, in order to operate stably, nozzle bricks with good thermal shock resistance and erosion resista...

AI Technical Summary

Problems solved by technology

Carbon-bonded fired aluminum-carbon and aluminum-carbon-zirconium sliding plates can basically meet the requirements of steel mills, but due to low high-temperature strength, there are problems such as short service life, roughness in the sliding area, and cold steel.

In addition, for carbon-bonded fired aluminum-carbon slides and aluminum-carbon-zirconium slides, there are disadvantages of high firing costs and long production cycles, and oil-impregnated asphalt is required after firing, which will pollute the environment during production

The non-burning aluminum-carbon slide plate can basically meet the requirements of small and medium-sized ladles and tundishes. However, due to the unsatisfactory thermal shock resistance, radial cracks occur when used on large ladles, and there is a problem of short service life.