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

A sliding nozzle and amorphous boron technology, which is applied in metal processing equipment, casting melt containers, manufacturing tools, etc., can solve the problems of unsatisfactory thermal shock resistance, low high temperature strength, and short service life, and achieve excellent anti-corrosion Excellent oxidation performance, hydration resistance, and long service life

Active Publication Date: 2013-05-29
HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1: A non-burning metal-bonded aluminum-carbon-zirconium sliding nozzle brick containing amorphous boron and its production method

[0020] 1. Raw material composition: expressed by weight percentage, including 56.2% corundum, 0.3% amorphous boron, 15% silicon carbide, 20% zirconium mullite, 3% graphite, 3.5% aluminum silicon alloy and 2 % Of lithium bentonite, plus 5% of the total amount of the above raw materials phenolic resin binder.

[0021] Among them, corundum includes corundum powder and corundum particles. Corundum powder has a particle size of ≤400 mesh, accounting for 24.2%; corundum particles include 1mm

[0022] Amorphous boron is particle size ≤1000 mesh Amorphous boron powder; silicon carbide particle size ≤0.5mm, zirconium mullite particle size ≤1mm, graphite is flake graphite powder particle size ≤200 mesh; aluminum-silicon allo...

Example Embodiment

[0027] Embodiment 2: It is basically the same as Embodiment 1, except that:

[0028] Raw material composition: expressed by weight percentage, including 69% corundum, 1.5% amorphous boron, 10% silicon carbide, 10% zirconium mullite, 2% graphite, 4.5% aluminum silicon alloy and 3% Lithium bentonite, plus 5.5% phenolic resin binder of the above raw materials.

[0029] Among them, corundum includes corundum powder and corundum particles. Corundum powder has a particle size of ≤400 mesh, accounting for 22%; corundum particles include 1mm

[0030] Other raw material requirements and production methods are the same as in Example 1.

Example Embodiment

[0031] Embodiment 3: It is basically the same as Embodiment 1, except that:

[0032] Raw material composition: expressed by weight percentage, including 66% corundum, 3% amorphous boron, 5% silicon carbide, 15% zirconium mullite, 4% graphite, 6% aluminum silicon alloy and 1% Lithium bentonite plus phenolic resin binder containing 6% of the above raw materials.

[0033] Among them, corundum includes corundum powder and corundum particles. Corundum powder has a particle size of ≤400 mesh, accounting for 19%, and corundum particles include 1mm

[0034] Other raw material requirements and production methods are the same as in Example 1.

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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...

Claims

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Application Information

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IPC IPC(8): B22D41/32C04B35/103
Inventor 徐林富徐跃庆宋桂兰李宏宇梁保青徐光雷
Owner HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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