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A kind of preparation method of ladle refractory permeable brick

A breathable brick and refractory technology, which is applied in the field of metal smelting, can solve the problems of affecting the service life of bricks, brick damage, poor thermal shock resistance, etc., to improve thermal shock resistance, prolong service life, and improve product machinery. performance effect

Active Publication Date: 2021-02-02
山东银山耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: In view of the poor thermal shock resistance of the traditional ladle refractory permeable brick during use, and the brick body is easily damaged during the high-temperature oxygen blowing process, thereby affecting the service life of the brick body. Provided is a method for preparing a ladle refractory breathable brick

Method used

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  • A kind of preparation method of ladle refractory permeable brick

Examples

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example 1

[0022] In parts by weight, 80 parts of aluminum powder, 40 parts of boron powder, and 70 parts of carbon powder are successively taken and added to the crucible, and the crucible is moved into a high-temperature furnace. After cooling down to room temperature with the furnace, transfer the material in the crucible to a grinder and grind it into powder to obtain aluminum-boron-carbon mixed powder; mix petroleum coke powder and mixed acid solution in a mass ratio of 1:8 and pour it into a beaker, and Move the beaker to a magnetic stirrer with digital display speed measurement and constant temperature. Under the conditions of temperature 85°C and speed 600r / min, heat and stir for 5 hours, stop heating, cool to 50°C under stirring, and then add the mass of mixed acid solution 3 times of ethylene glycol, continue to stir and mix with a stirrer at a speed of 600r / min for 3 hours, stop stirring, and move the beaker into the refrigerator, refrigerate for 8 hours at a temperature of 6°C...

example 2

[0024]Mix the petroleum coke powder and the mixed acid solution in a mass ratio of 1:8 and pour it into a beaker, and move the beaker to a digital speed measuring constant temperature magnetic stirrer, and heat and stir at a temperature of 85°C and a speed of 600r / min. After reacting for 5 hours, stop heating, and cool to 50°C under stirring, then add ethylene glycol that is 3 times the mass of the mixed acid solution, continue stirring and mixing with a stirrer at a speed of 600r / min for 3 hours, stop stirring, and move the beaker into In the refrigerator, refrigerate for 8 hours at a temperature of 6°C, then filter the material in the refrigerated beaker to obtain a filter cake, and wash it with deionized water until the washing liquid is neutral to obtain a wet gel; calculated in parts by weight, Take 40 parts of magnesia, 20 parts of wet gel, 50 parts of bauxite, 20 parts of feldspar, 15 parts of fly ash, 6 parts of potassium permanganate, 10 parts of organic binder, 40 par...

example 3

[0026] In parts by weight, 80 parts of aluminum powder, 40 parts of boron powder, and 70 parts of carbon powder are successively taken and added to the crucible, and the crucible is moved into a high-temperature furnace. After cooling to room temperature with the furnace, transfer the material in the crucible to a grinder, and grind it into powder to obtain an aluminum-boron-carbon mixed powder; in parts by weight, take 40 parts of magnesia, 10 parts of aluminum-boron-carbon mixed powder, and 50 parts by weight. Parts of bauxite, 20 parts of feldspar, 15 parts of fly ash, 6 parts of potassium permanganate, 10 parts of organic binder, 40 parts of water, poured into the mixer, and stirred with a stirrer at a speed of 500r / min After mixing for 3 hours, pour the materials in the mixer into the mould, press and form at a pressure of 10MPa, demould to obtain bricks, and move the obtained bricks into the sintering furnace, and feed them into the furnace at a rate of 300L / min. Inert g...

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Abstract

The invention discloses a method for preparing a ladle refractory air-permeable brick, which belongs to the technical field of metal smelting. In the present invention, aluminum powder, carbon powder and boron powder are heated, stirred and melted, cooled and ground to obtain aluminum-boron-carbon mixed powder; then petroleum coke powder and mixed acid solution are mixed, heated and stirred for reaction, and after the reaction is completed, the Add ethylene glycol, continue to stir and mix, refrigerate, wash with water until neutral, and get wet gel; then mix magnesia, wet gel, aluminum boron carbon mixed powder, bauxite, feldspar, fly ash, high manganese Potassium acid potassium, organic binder and water are stirred and mixed evenly, and pressed into shape to obtain adobe; the obtained adobe is slowly heated up under the protection of an inert gas. Sintered material: The sintered material is ultrasonically cleaned with lye, washed with water until neutral, and dried to obtain a ladle refractory air-permeable brick. The ladle refractory air permeable brick obtained in the invention has excellent thermal shock resistance, and the service life is further extended.

Description

technical field [0001] The invention discloses a method for preparing a ladle refractory air-permeable brick, which belongs to the technical field of metal smelting. Background technique [0002] Due to its unique working environment and harsh service conditions, the ladle permeable brick refractory has been subjected to many weak and chemical tests. The first is the higher operating temperature, working up to 1700°C. During the oxygen purge phase, the temperature can reach 2000°C. Secondly, the frequent stirring and flowing of molten steel will cause greater erosion and wear to the breathable bricks. Thirdly, frequent and sudden temperature changes in the permeable bricks will generate greater thermal stress, making the permeable bricks prone to cracks and peeling off. Finally, in the stage of oxygen purging, due to the high temperature, the permeable bricks are easily eroded by the molten steel, and the residue at the bottom of the ladle will also have a greater chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3206C04B2235/3217C04B2235/402C04B2235/421C04B2235/422
Inventor 钱兴马俊杰朱东东
Owner 山东银山耐火材料有限公司