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A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD OF MAGNESIA CARBON BRICK
To provide a magnesia carbon brick that has excellent spalling resistance even with a low graphite content and also has excellent corrosion resistance.SOLUTION: In the manufacturing method of magnesia carbon bricks, pitch and tar such as pitch, diluted pitch obtained by diluting pitch with a solvent, tar or diluted tar obtained by diluting tar with a solvent are added, as binders, to a refractory raw material composition containing 85 mass% or more of magnesia and 12 mass% or less (including 0) of graphite and are kneaded warmly, then molded warmly, a particle size structure of magnesia in the refractory raw material composition is adjusted such that a mass ratio of magnesia with a particle size of 1 mm or more to magnesia with a particle size of 0.075 mm or more and less than 1 mm is 0.2 or more and 1.5 or less, and a mass ratio of magnesia with a particle size of 1 mm or more to magnesia with a particle size of less than 0.075 mm is 3.0 or more.SELECTED DRAWING: None
【課題】、黒鉛の含有率が少なくても耐スポーリング性に優れ、しかも耐食性にも優れるマグネシアカーボンれんがを提供する。【解決手段】マグネシアを８５質量％以上含有しかつ黒鉛の含有率が１２質量％以下（０を含む）である耐火原料配合物に、バインダーとして、ピッチ、ピッチを溶剤で希釈した希釈ピッチ、タール又はタールを溶剤で希釈した希釈タールであるピッチ・タール類を添加し、温間で混練後、温間で成形するマグネシアカーボンれんがの製造方法において、耐火原料配合物中のマグネシアの粒度構成を、粒径０．０７５ｍｍ以上１ｍｍ未満のマグネシアに対する粒径１ｍｍ以上のマグネシアの質量比が０．２以上１．５以下、及び粒径０．０７５ｍｍ未満のマグネシアに対する粒径１ｍｍ以上のマグネシアの質量比が３．０以上となるようにする。【選択図】なし
MANUFACTURING METHOD OF MAGNESIA CARBON BRICK
To provide a magnesia carbon brick that has excellent spalling resistance even with a low graphite content and also has excellent corrosion resistance.SOLUTION: In the manufacturing method of magnesia carbon bricks, pitch and tar such as pitch, diluted pitch obtained by diluting pitch with a solvent, tar or diluted tar obtained by diluting tar with a solvent are added, as binders, to a refractory raw material composition containing 85 mass% or more of magnesia and 12 mass% or less (including 0) of graphite and are kneaded warmly, then molded warmly, a particle size structure of magnesia in the refractory raw material composition is adjusted such that a mass ratio of magnesia with a particle size of 1 mm or more to magnesia with a particle size of 0.075 mm or more and less than 1 mm is 0.2 or more and 1.5 or less, and a mass ratio of magnesia with a particle size of 1 mm or more to magnesia with a particle size of less than 0.075 mm is 3.0 or more.SELECTED DRAWING: None
【課題】、黒鉛の含有率が少なくても耐スポーリング性に優れ、しかも耐食性にも優れるマグネシアカーボンれんがを提供する。【解決手段】マグネシアを８５質量％以上含有しかつ黒鉛の含有率が１２質量％以下（０を含む）である耐火原料配合物に、バインダーとして、ピッチ、ピッチを溶剤で希釈した希釈ピッチ、タール又はタールを溶剤で希釈した希釈タールであるピッチ・タール類を添加し、温間で混練後、温間で成形するマグネシアカーボンれんがの製造方法において、耐火原料配合物中のマグネシアの粒度構成を、粒径０．０７５ｍｍ以上１ｍｍ未満のマグネシアに対する粒径１ｍｍ以上のマグネシアの質量比が０．２以上１．５以下、及び粒径０．０７５ｍｍ未満のマグネシアに対する粒径１ｍｍ以上のマグネシアの質量比が３．０以上となるようにする。【選択図】なし
MANUFACTURING METHOD OF MAGNESIA CARBON BRICK
マグネシアカーボンれんがの製造方法
SHIOHAMA MITSUHARU (author)
2024-07-24
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
METHOD OF PRODUCING MAGNESIA-CARBON BRICK AND MAGNESIA-CARBON BRICK
| European Patent Office | 2015