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Title:
REFRACTORY AND NOZZLE FOR CASTING
Document Type and Number:
WIPO Patent Application WO/2014/148530
Kind Code:
A1
Abstract:
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.

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Inventors:
MORIKAWA KATSUMI (JP)
SASAKI AKINARI (JP)
MAKINO TARO (JP)
LI LING (JP)
Application Number:
PCT/JP2014/057472
Publication Date:
September 25, 2014
Filing Date:
March 19, 2014
Export Citation:
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Assignee:
KROSAKIHARIMA CORP (JP)
International Classes:
B22D11/10; B22D41/54; C04B35/043
Domestic Patent References:
WO1999038818A11999-08-05
WO2013081113A12013-06-06
WO1999038818A11999-08-05
Foreign References:
JPH059062A1993-01-19
JPH09278546A1997-10-28
JPH06321626A1994-11-22
JPH10305355A1998-11-17
JPH11320047A1999-11-24
JPH01305851A1989-12-11
JP2002316878A2002-10-31
JPH06321625A1994-11-22
JP2004323260A2004-11-18
Other References:
See also references of EP 2977126A4
Attorney, Agent or Firm:
EIWA PATENT FIRM (JP)
Patent business corporation English-Japanese patent firm (JP)
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