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MANUFACTURING METHOD OF MAGNESIA-CHROMIUM BRICK AND USE METHOD
PROBLEM TO BE SOLVED: To provide a magnesia-chromium brick capable of extending further life while maintaining spalling resistance close to that of a magnesia-chromium brick.SOLUTION: There is provided a manufacturing method of a magnesia-chromium brick in which pitch is impregnated into a burned magnesia-chromium brick. The burned magnesia-chromium brick contains MgO of 25 to 85 mass%, CrOof 5 to 55 mass%, AlOof 1 to 14 mass%, FeOof 2 to 17 mass% and impurities of less than 5 mass%. Burning temperature of the burned magnesia-chromium brick is 1650 to 2000°C. Impregnation rate by a pitch impregnation treatment is 2 to 8 mass%, the pitch impregnation treatment includes inputting the magnesium-chromium brick after burning in a melting tank excess heated at 100 to 400°C in advance, and conducting a treatment at pressing press of 10 kgf/cmor more and pressing time of 2 hours or more. The pitch used in the pitch impregnation treatment is 5 mass% or less of a quinoline insoluble component and fixed carbon amount is 25 mass% or more.SELECTED DRAWING: None
【課題】マグネシア−カーボン質煉瓦に近い耐スポーリング性を維持しつつ、更なる長寿命化できるマグネシア−クロム質煉瓦を得る。【解決手段】焼成マグネシア−クロム質煉瓦にピッチを含浸したマグネシア−クロム質煉瓦の製造方法である。上記焼成マグネシア−クロム質煉瓦は、MgOを25-85質量%、Cr2O3を5-55質量%、Al2O3を1-14質量%、Fe2O3を2-17質量%及び不純物を5質量%未満有する。前記焼成マグネシア−クロム質煉瓦の焼成温度は、1650-2000℃である。また、ピッチ含浸処理による含浸率が2-8質量%であり、ピッチ含浸処理は、予め100-400℃に余熱したピッチの溶融槽中に、焼成後のマグネシア−クロム質煉瓦を投入し、加圧力10kgf/cm2以上、加圧時間2時間以上の処理を行う。前記ピッチ含浸処理に使用されるピッチはキノリン不溶分5質量%以下、かつ固定炭素量が25質量%以上のものである。【選択図】なし
MANUFACTURING METHOD OF MAGNESIA-CHROMIUM BRICK AND USE METHOD
PROBLEM TO BE SOLVED: To provide a magnesia-chromium brick capable of extending further life while maintaining spalling resistance close to that of a magnesia-chromium brick.SOLUTION: There is provided a manufacturing method of a magnesia-chromium brick in which pitch is impregnated into a burned magnesia-chromium brick. The burned magnesia-chromium brick contains MgO of 25 to 85 mass%, CrOof 5 to 55 mass%, AlOof 1 to 14 mass%, FeOof 2 to 17 mass% and impurities of less than 5 mass%. Burning temperature of the burned magnesia-chromium brick is 1650 to 2000°C. Impregnation rate by a pitch impregnation treatment is 2 to 8 mass%, the pitch impregnation treatment includes inputting the magnesium-chromium brick after burning in a melting tank excess heated at 100 to 400°C in advance, and conducting a treatment at pressing press of 10 kgf/cmor more and pressing time of 2 hours or more. The pitch used in the pitch impregnation treatment is 5 mass% or less of a quinoline insoluble component and fixed carbon amount is 25 mass% or more.SELECTED DRAWING: None
【課題】マグネシア−カーボン質煉瓦に近い耐スポーリング性を維持しつつ、更なる長寿命化できるマグネシア−クロム質煉瓦を得る。【解決手段】焼成マグネシア−クロム質煉瓦にピッチを含浸したマグネシア−クロム質煉瓦の製造方法である。上記焼成マグネシア−クロム質煉瓦は、MgOを25-85質量%、Cr2O3を5-55質量%、Al2O3を1-14質量%、Fe2O3を2-17質量%及び不純物を5質量%未満有する。前記焼成マグネシア−クロム質煉瓦の焼成温度は、1650-2000℃である。また、ピッチ含浸処理による含浸率が2-8質量%であり、ピッチ含浸処理は、予め100-400℃に余熱したピッチの溶融槽中に、焼成後のマグネシア−クロム質煉瓦を投入し、加圧力10kgf/cm2以上、加圧時間2時間以上の処理を行う。前記ピッチ含浸処理に使用されるピッチはキノリン不溶分5質量%以下、かつ固定炭素量が25質量%以上のものである。【選択図】なし
MANUFACTURING METHOD OF MAGNESIA-CHROMIUM BRICK AND USE METHOD
マグネシア−クロム質煉瓦の製造方法並びに使用方法
FUJIYOSHI RYOMA (author) / TORIGOE ATSUSHI (author) / INOUE KAZUHIRO (author) / MURAKAMI KOYO (author)
2018-01-25
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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METHOD FOR RECYCLING MAGNESIA-SPINEL BRICK, AND MAGNESIA-SPINEL BRICK
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