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A platform for research: civil engineering, architecture and urbanism
METHOD FOR RECYCLING MAGNESIA-SPINEL BRICK, AND MAGNESIA-SPINEL BRICK
To efficiently remove and recycle impurities deposited in a used magnesia-spinel brick.SOLUTION: A magnesia-spinel brick contains 60 mass% or more and 95 mass% or less of magnesia material and 5 mass% or more and 40 mass% or less of spinel material, wherein an SiO2 content is less than 0.25 mass% and a CaO/SiO2 (mass ratio) is 2.5 or more and 4.0 or less. The magnesia-spinel brick is treated at 1,300°C or more and 1,500°C or less in an atmosphere having a total pressure of 101 kPa or less and an oxygen partial pressure of 5 kPa or less. By using 5 mass% or more and 40 mass% or less of the treated raw materials, the magnesia-spinel brick is formed as a recycled brick, the magnesia-spinel brick containing: 50 mass% or more and 95 mass% or less of magnesia material; 5 mass% or more and 35 mass% or less of spinel material; less than 0.25 mass% of SiO2 content; and 2.5 or more and 4.0 or less of CaO/SiO2 (mass ratio).SELECTED DRAWING: None
【課題】使用済マグネシア・スピネルれんがに沈積した不純物を、効率的に除去し、リサイクルする。【解決手段】マグネシア原料６０質量％以上９５質量％以下、スピネル原料５質量％以上４０質量％以下含み、ＳｉＯ２含有量が０．２５質量％未満、ＣａＯ／ＳｉＯ２（質量比）が２．５以上４．０以下とするマグネシア・スピネルれんがを、全圧が１０１ｋＰａ以下で酸素分圧が５ｋＰａ以下の雰囲気下で、１３００℃以上１５００℃以下で処理する。上記処理した原料を５質量％以上４０質量％以下用い、マグネシア原料５０質量％以上９５質量％以下、スピネル原料５質量％以上３５質量％以下含み、ＳｉＯ２含有量が０．２５質量％未満、ＣａＯ／ＳｉＯ２（質量比）が２．５以上４．０以下であるマグネシア・スピネルれんがをリサイクルれんがとして成形する。【選択図】なし
METHOD FOR RECYCLING MAGNESIA-SPINEL BRICK, AND MAGNESIA-SPINEL BRICK
To efficiently remove and recycle impurities deposited in a used magnesia-spinel brick.SOLUTION: A magnesia-spinel brick contains 60 mass% or more and 95 mass% or less of magnesia material and 5 mass% or more and 40 mass% or less of spinel material, wherein an SiO2 content is less than 0.25 mass% and a CaO/SiO2 (mass ratio) is 2.5 or more and 4.0 or less. The magnesia-spinel brick is treated at 1,300°C or more and 1,500°C or less in an atmosphere having a total pressure of 101 kPa or less and an oxygen partial pressure of 5 kPa or less. By using 5 mass% or more and 40 mass% or less of the treated raw materials, the magnesia-spinel brick is formed as a recycled brick, the magnesia-spinel brick containing: 50 mass% or more and 95 mass% or less of magnesia material; 5 mass% or more and 35 mass% or less of spinel material; less than 0.25 mass% of SiO2 content; and 2.5 or more and 4.0 or less of CaO/SiO2 (mass ratio).SELECTED DRAWING: None
【課題】使用済マグネシア・スピネルれんがに沈積した不純物を、効率的に除去し、リサイクルする。【解決手段】マグネシア原料６０質量％以上９５質量％以下、スピネル原料５質量％以上４０質量％以下含み、ＳｉＯ２含有量が０．２５質量％未満、ＣａＯ／ＳｉＯ２（質量比）が２．５以上４．０以下とするマグネシア・スピネルれんがを、全圧が１０１ｋＰａ以下で酸素分圧が５ｋＰａ以下の雰囲気下で、１３００℃以上１５００℃以下で処理する。上記処理した原料を５質量％以上４０質量％以下用い、マグネシア原料５０質量％以上９５質量％以下、スピネル原料５質量％以上３５質量％以下含み、ＳｉＯ２含有量が０．２５質量％未満、ＣａＯ／ＳｉＯ２（質量比）が２．５以上４．０以下であるマグネシア・スピネルれんがをリサイクルれんがとして成形する。【選択図】なし
METHOD FOR RECYCLING MAGNESIA-SPINEL BRICK, AND MAGNESIA-SPINEL BRICK
マグネシア・スピネルれんがの再資源化方法およびマグネシア・スピネルれんが
TODA YOSHIHIRO (author)
2024-05-15
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
/
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