Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
DURABLE SLEEVE BRICKS
Disclosed is a magnesia-carbon based sleeve brick for steelmaking converters, which is obtained by adding, to a refractory raw material mix containing 60 to 95 mass% of a magnesia raw material and 5 to 20 mass% of graphite, a metal powder of one or more selected from the group consisting of Al, Si, Mg, Ca, Cr and an alloy thereof, in an amount of greater than 3 to 6 mass%, and an organic binder, in addition to 100 mass% of the refractory raw material mix, and subjecting the resulting mixture to kneading, forming and heat treatment, wherein the sleeve brick is used under a condition that a thickness thereof is set at 70 mm or less. This makes it possible to prevent cracking which would otherwise occur in the sleeve brick itself, to allow the sleeve brick to have enhanced durability. One or more selected from the group consisting of B, B 4 C, MgB 2 , CaB 6 and CrB may be further added in an amount of 0.1 to 3 mass%, in addition to 100 mass% of the refractory raw material mix, to enhance strength and oxidation resistance and further enhance the durability. The magnesia raw material may comprise a first particle fraction having a particle diameter of greater than 10 to 500 µm and occupying 20 to 50 mass% in the refractory raw material mix, and a second particle fraction having a particle diameter of 10 µm or less and occupying 5 mass% or less in the refractory raw material mix, to additionally enhance corrosion resistance and thermal shock resistance.
DURABLE SLEEVE BRICKS
Disclosed is a magnesia-carbon based sleeve brick for steelmaking converters, which is obtained by adding, to a refractory raw material mix containing 60 to 95 mass% of a magnesia raw material and 5 to 20 mass% of graphite, a metal powder of one or more selected from the group consisting of Al, Si, Mg, Ca, Cr and an alloy thereof, in an amount of greater than 3 to 6 mass%, and an organic binder, in addition to 100 mass% of the refractory raw material mix, and subjecting the resulting mixture to kneading, forming and heat treatment, wherein the sleeve brick is used under a condition that a thickness thereof is set at 70 mm or less. This makes it possible to prevent cracking which would otherwise occur in the sleeve brick itself, to allow the sleeve brick to have enhanced durability. One or more selected from the group consisting of B, B 4 C, MgB 2 , CaB 6 and CrB may be further added in an amount of 0.1 to 3 mass%, in addition to 100 mass% of the refractory raw material mix, to enhance strength and oxidation resistance and further enhance the durability. The magnesia raw material may comprise a first particle fraction having a particle diameter of greater than 10 to 500 µm and occupying 20 to 50 mass% in the refractory raw material mix, and a second particle fraction having a particle diameter of 10 µm or less and occupying 5 mass% or less in the refractory raw material mix, to additionally enhance corrosion resistance and thermal shock resistance.
DURABLE SLEEVE BRICKS
HALTBARE STOPFENSTANGENROHRE
BRIQUES A MANCHON DURABLES
TANAKA MASATO (Autor:in) / HATAE EIICHIRO (Autor:in) / HOKII TOSHIYUKI (Autor:in) / YOSHITOMI JOKI (Autor:in)
19.10.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
/
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
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
/
C22C
Legierungen
,
ALLOYS
/
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
HIGH STRENGTH AND DURABLE CHAR-BASED BRICKS AND METHODS OF MAKING CHAR-BASED BRICKS
| Europäisches Patentamt | 2024
Method for manufacturing high-strength durable ganged bricks with waste aluminum ash
| Europäisches Patentamt | 2015
Use of ceramic waste powder for manufacturing durable and eco-friendly bricks
| Online Contents | 2019
Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners
| Europäisches Patentamt | 2016