HEAT INSULATING MATERIAL FOR CONTINUOUS CASTING OF IRON AND STEEL AND ITS USE METHOD

Title:

HEAT INSULATING MATERIAL FOR CONTINUOUS CASTING OF IRON AND STEEL AND ITS USE METHOD

Document Type and Number:

Japanese Patent JPH07284895

Kind Code:

A

Abstract:

PURPOSE: To provide a heat insulating material which is excellent in the heat insulatability of the molten steel in a tundish.

CONSTITUTION: The heat insulating material which contains 20 to 30 wt.% MgO, 35 to 42 wt.% SiO2, 10 to 20 wt.%; Al2O3 and 3 to 4 wt.% water of crystallization as essential components and has a bulk specific gravity below 0.3 is produced. A and B denote the composition having an SiO2/Al2O3 ratio of 2/1 to 1/1. The initially fed heat insulating material is produced by using the composition in this range added with 20 to 35 wt.% MgO as an essential component. Such tundish heat insulating material coats the surface of the molten steel in the tundish for continuous casting to two layers with the initially fed heat insulating material as a lower layer, thereby shutting off the molten steel from air and providing heat insulation. The heat insulating material less picks up hazardous gases and is particularly suitable for continuous casting of extra-low carbon steel.

Inventors:

OTAKE YASUO
USUI HIROHARU
IKEDA JUNJI
KAMATA RYUJI
MIYAZAKI KATSUYOSHI

Application Number:

JP6365494A

Publication Date:

October 31, 1995

Filing Date:

March 31, 1994

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SHOWA KIGYO KOFUN YUUGENKOUSHI
TOHO KINZOKU KK
NISSHIN STEEL CO LTD

International Classes:

B22D11/10; B22D7/10; B22D11/108; B22D11/11; B22D11/111; B22D11/112; B22D11/116; B22D11/117; B22D27/06; (IPC1-7): B22D11/10; B22D7/10; B22D11/10

Attorney, Agent or Firm:

Nishikyo Keiichiro

Previous Patent: hair tie band

Next Patent: METHOD FOR CONTINUOUSLY CASTING STEEL AND MOLD FOR CONTINUOUS CASTING