METHOD FOR MANUFACTURING IMMERSION NOZZLE LESS SUSCEPTIBLE TO DEPOSITION OF ALUMINA FOR USE IN CONTINUOUS CASTING

Title:

METHOD FOR MANUFACTURING IMMERSION NOZZLE LESS SUSCEPTIBLE TO DEPOSITION OF ALUMINA FOR USE IN CONTINUOUS CASTING

Document Type and Number:

WIPO Patent Application WO/2004/018125

Kind Code:

A1

Abstract:

A method for manufacturing an immersion nozzle having a zirconia·graphite based refractory provided in the powder line portion thereof, wherein, further, at least in the portion inside the hole of the nozzle, the body of the nozzle is integrally formed with a compound comprising 10 mass % or more of a clinker which has the surface of particles containing CaO as a mineral phase and having been subjected to a hydration preventing treatment such as the formation of CaCO₃ by a heat treatment in a CO₂atmosphere. The method allows the inhibition of the reaction with the moisture released from a resin being added as a binder and thus the suppression of expansion of the volume of the body, which results in the prevention of occurrence of clacks in the resultant formed product during firing.

Inventors:

OGATA KOJI (JP)
HOOVER DONALD BRUCE (US)

Application Number:

PCT/JP2003/010473

Publication Date:

March 04, 2004

Filing Date:

August 19, 2003

Export Citation:

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Assignee:

KROSAKIHARIMA CORP (JP)
LWB REFRACTORIES COMPANY (US)
OGATA KOJI (JP)
HOOVER DONALD BRUCE (US)

International Classes:

B22D41/54; C04B35/057; C04B35/48; C04B41/45; B22D11/10; C04B41/85; (IPC1-7): B22D11/10; B22D41/52; B22D41/54; C04B35/06

Foreign References:

JPH0740015A	1995-02-10
JPS61256961A	1986-11-14
JPH0428462A	1992-01-31
JPH06247767A	1994-09-06

Other References: