Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Refractory and nozzle for casting
The present invention provides a refractory which combines excellent corrosion resistance and excellent thermal shock resistance, though it was difficult for a conventional refractory to combine both. Further, the present invention provides a nozzle for casting, said nozzle using the refractory. A refractory which comprises at least 40 mass% of MgO and 4 to 30 mass% of a free carbon component, and contains one or more selected from among B2O3, P2O5, SiO2 and TiO2 in a total amount of 0.3 to 3 mass% with the balance being other refractory components, characterized in that: a void layer is present at an interface between a carbon-containing matrix present on both sides of at least the largest particle among the MgO-containing particles of the refractory and the largest particle; the total thickness of the void layer is 0.2 to 3.0% of the size of the particle; and an inorganic compound formed from both MgO and one or more selected from among B2O3, P2O5, SiO2 and TiO2 is present on the all or some of the surfaces of the MgO-containing particles.
Refractory and nozzle for casting
The present invention provides a refractory which combines excellent corrosion resistance and excellent thermal shock resistance, though it was difficult for a conventional refractory to combine both. Further, the present invention provides a nozzle for casting, said nozzle using the refractory. A refractory which comprises at least 40 mass% of MgO and 4 to 30 mass% of a free carbon component, and contains one or more selected from among B2O3, P2O5, SiO2 and TiO2 in a total amount of 0.3 to 3 mass% with the balance being other refractory components, characterized in that: a void layer is present at an interface between a carbon-containing matrix present on both sides of at least the largest particle among the MgO-containing particles of the refractory and the largest particle; the total thickness of the void layer is 0.2 to 3.0% of the size of the particle; and an inorganic compound formed from both MgO and one or more selected from among B2O3, P2O5, SiO2 and TiO2 is present on the all or some of the surfaces of the MgO-containing particles.
Refractory and nozzle for casting
MORIKAWA KATSUMI (Autor:in) / SASAKI AKINARI (Autor:in) / MAKINO TARO (Autor:in) / LI LING (Autor:in)
23.12.2015
Patent
Elektronische Ressource
Englisch
NOZZLE REFRACTORY FOR CONTINUOUS CASTING, AND NOZZLE FOR CONTINUOUS CASTING
| Europäisches Patentamt | 2017