Preparation method of dispersion type gas permeable brick for ladle

A technology of breathable bricks and shaped steels, applied in the field of refractory materials, can solve the problems of poor thermal shock resistance, poor mechanical properties and air permeability, and slag erosion resistance of breathable bricks, so as to achieve improved slag erosion resistance, improved mechanical properties, and improved resistance to slag erosion. The effect of thermal shock performance improvement

Inactive Publication Date: 2018-03-16
常州富思通管道有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is: aiming at the shortcomings of traditional air permeable bricks such as poor slag erosion resistance and thermal shock resistance, as well as poor mechanical properties and air permeability, a preparation method for diffused ladle air permeable bricks is provided

Method used

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  • Preparation method of dispersion type gas permeable brick for ladle
  • Preparation method of dispersion type gas permeable brick for ladle
  • Preparation method of dispersion type gas permeable brick for ladle

Examples

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example 1

[0024]Mix rice husk fiber and calcium carbonate powder into the ball mill according to the mass ratio of 3:1, and add potassium permanganate powder with 0.5 times the mass of rice husk fiber, quartz sand and rice husk fiber with 0.3 times the mass of rice husk fiber to the ball mill 4 times the mass of zirconia ball milling beads, ball milled and mixed for 45 minutes, passed through a 180-mesh sieve, and the additive was obtained; the corundum mixture and zirconia powder were mixed at a mass ratio of 25:2, and an additive of 0.40 times the mass of the corundum mixture was added, and the corundum mixture was Dispersant with a mass of 0.10 times the mass of corundum and water with a mass of 0.15 times the corundum are stirred and mixed for 50 minutes at a temperature of 55°C and a rotational speed of 260r / min to obtain a mixture, which is then moved into a mold and vibrated to form a billet ; Under the condition that the temperature is 40°C, the billet is maintained at a constant...

example 2

[0026] Mix quartz sand and calcium carbonate powder into the ball mill according to the mass ratio of 1:1, and add potassium permanganate powder with 1.5 times the mass of quartz sand and zirconia ball milling beads with 12 times the mass of quartz sand to the ball mill, and mix for 45 minutes. Pass through a 180-mesh sieve to obtain additives; mix the corundum mixture and zirconia powder at a mass ratio of 25:2, add additives 0.40 times the mass of the corundum mixture, dispersant 0.10 times the mass of the corundum mixture, and water 0.15 times the mass of the corundum , at a temperature of 55°C and a rotational speed of 260r / min, stir and mix for 50 minutes to obtain a mixture, move the mixture into a mold, and vibrate to form a billet; Keep away from light for 36 hours, remove the mold, move the demoulded billet into the calciner, raise the temperature to 600°C at a heating rate of 60°C / h, keep the heat for 8 hours, cool to room temperature with the furnace, and discharge t...

example 3

[0028] Mix the rice husk fiber and calcium carbonate powder in a mass ratio of 3:1 and add them to the ball mill. Quartz sand with 0.3 times the mass of rice husk fiber and zirconia ball milling beads with 4 times the mass of rice husk fiber are ball milled for 45 minutes and passed through a 180-mesh sieve. To obtain additives; mix the corundum mixture and zirconia powder at a mass ratio of 25:2, add additives 0.40 times the mass of the corundum mixture, dispersant 0.10 times the mass of the corundum mixture, and water 0.15 times the mass of the corundum, at a temperature of 55 ℃, the rotation speed is 260r / min, after stirring and mixing for 50 minutes, the mixture is obtained, and the mixture is moved into the mold, and vibrated to form a billet; the billet is maintained at a constant temperature and protected from light for 36 hours at a temperature of 40°C. Remove the mold, move the demoulded billet into the calciner, raise the temperature to 600°C at a heating rate of 60°C...

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Abstract

The invention discloses a preparation method of a dispersion type gas permeable brick for ladle, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: mixing a corundum mixture with zirconia powder, adding an additive, a dispersant, and water, stirring and mixing to obtain a mixture; transferring the mixture to a mould, carrying out vibration moulding to obtain a blank; curing the blank at a constant temperature in the absence of light, removing the mould, burning the blank in a calcining furnace, cooling the blank to a room temperature, transferring the blank to a sintering furnace, sintering the blank under the protection of argon, cooling to a room temperature, performing discharging to obtain a primarily sintered gas permeablebrick; processing the primarily sintered gas permeable brick by a processing liquid, delivering the primarily sintered gas permeable brick to a sintering furnace, carrying out low temperature carbonization under the protection of nitrogen, then performing high temperature sintering to obtain secondarily sintered gas permeable brick; mixing the secondarily sintered gas permeable brick with water,introducing carbon dioxide into water, soaking, filtering, and drying to obtain the dispersion type gas permeable brick for ladle. The prepared gas permeable brick has an excellent performance on resisting slag corrosion and thermal shock, and the breathability and mechanical properties are also very good.

Description

technical field [0001] The invention discloses a preparation method of a diffused ladle air brick, which belongs to the technical field of refractory materials. Background technique [0002] In recent years, due to people's higher and higher requirements for steel quality, it is necessary to improve steelmaking technology and steelmaking process. Refining technology outside the furnace is an important part of the refining process in the steelmaking process, which can adjust the composition of steel and the temperature of molten steel. The permeable brick is the most critical functional element for the smooth implementation of this process, and plays a vital role in the reliability and completeness of the refining outside the furnace. [0003] As the key functional element in the bottom argon blowing process of the external refining process, the ladle ventilation brick plays a vital role in ensuring the reliability and safety of the external refining process. Due to the spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B38/00C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B38/0025C04B38/0675C04B2235/3201C04B2235/3208C04B2235/3246C04B2235/3267C04B2235/3418C04B2235/3826C04B2235/6562C04B2235/6567C04B2235/658C04B2235/661C04B2235/96
Inventor 刘芳伊徐颜峰陈龙
Owner 常州富思通管道有限公司
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