A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
POROUS REFRACTORY, METHOD OF PRODUCING POROUS REFRACTORY, AND GAS-BLOWING PLUG
To provide porous refractory having excellent gas permeability and easily preventing penetration of molten steel, and a method of producing the same.SOLUTION: The porous refractory has a mean pore diameter d50 of 230 μm or smaller which is a cumulative 50% pore diameter on the volume basis measured by the mercury porosimetry of JIS R1655, has a span value 'a' of the pore diameter expressed by formula (1) of 0.8 or below and has an air permeability measured by JIS R2115 of 1.2(×10-10 m2) or higher. Formula (1): a=(d10-d90)/d50, provided that d50 is a mean pore diameter, d10 and d90 are each a cumulative 10% pore diameter and a cumulative 90% pore diameter respectively on the volume basis from the large pore diameter side, measured by the mercury porosimetry of JIS R1655.SELECTED DRAWING: None
【課題】通気性が良好であり、かつ、溶鋼の浸透を抑止しやすいポーラス耐火物およびその製造方法を提供する。【解決手段】ＪＩＳ Ｒ１６５５の水銀圧入法により特定される気孔の体積基準の累積５０％気孔径である平均気孔径ｄ５０が２３０μｍ以下であり、式（１）で表される気孔径のスパン値ａが０．８以下であり、かつ、ＪＩＳ Ｒ２１１５により特定される通気率が１．２（×１０－１０ｍ２）以上であるポーラス耐火物。a＝（ｄ１０－ｄ９０）／ｄ５０ （１）ｄ５０は平均気孔径であり、ｄ１０およびｄ９０はそれぞれ、ＪＩＳ Ｒ１６５５の水銀圧入法により特定される気孔の体積基準の、気孔径が大きい側からの累積１０％気孔径および累積９０％気孔径である。【選択図】なし
POROUS REFRACTORY, METHOD OF PRODUCING POROUS REFRACTORY, AND GAS-BLOWING PLUG
To provide porous refractory having excellent gas permeability and easily preventing penetration of molten steel, and a method of producing the same.SOLUTION: The porous refractory has a mean pore diameter d50 of 230 μm or smaller which is a cumulative 50% pore diameter on the volume basis measured by the mercury porosimetry of JIS R1655, has a span value 'a' of the pore diameter expressed by formula (1) of 0.8 or below and has an air permeability measured by JIS R2115 of 1.2(×10-10 m2) or higher. Formula (1): a=(d10-d90)/d50, provided that d50 is a mean pore diameter, d10 and d90 are each a cumulative 10% pore diameter and a cumulative 90% pore diameter respectively on the volume basis from the large pore diameter side, measured by the mercury porosimetry of JIS R1655.SELECTED DRAWING: None
【課題】通気性が良好であり、かつ、溶鋼の浸透を抑止しやすいポーラス耐火物およびその製造方法を提供する。【解決手段】ＪＩＳ Ｒ１６５５の水銀圧入法により特定される気孔の体積基準の累積５０％気孔径である平均気孔径ｄ５０が２３０μｍ以下であり、式（１）で表される気孔径のスパン値ａが０．８以下であり、かつ、ＪＩＳ Ｒ２１１５により特定される通気率が１．２（×１０－１０ｍ２）以上であるポーラス耐火物。a＝（ｄ１０－ｄ９０）／ｄ５０ （１）ｄ５０は平均気孔径であり、ｄ１０およびｄ９０はそれぞれ、ＪＩＳ Ｒ１６５５の水銀圧入法により特定される気孔の体積基準の、気孔径が大きい側からの累積１０％気孔径および累積９０％気孔径である。【選択図】なし
POROUS REFRACTORY, METHOD OF PRODUCING POROUS REFRACTORY, AND GAS-BLOWING PLUG
ポーラス耐火物、ポーラス耐火物の製造方法およびガス吹きプラグ
FURUKAWA TETSUYA (author)
2024-10-04
Patent
Electronic Resource
Japanese
REFRACTORY FOR GAS BLOWING NOZZLE AND GAS BLOWING NOZZLE
| European Patent Office | 2020