Dispensing – Molten metal dispensing – With subjacent flow guide
Patent
1995-10-26
1997-10-28
Kastler, Scott
Dispensing
Molten metal dispensing
With subjacent flow guide
222591, 222590, 266236, 501100, B22D 4154
Patent
active
056814992
ABSTRACT:
A dense carbon free surface is provided on a carbon bonded refractory shape which is particularly useful as a pouring tube liner to prevent the formation and build-up of alumina particles which may cause blockage of the tube. The carbon free, dense layer is also hard and erosion resistant making it ideal for use in other applications such as stopper rod noses. The material comprises a refractory mix having a major component of refractory oxides such as alumina and zirconia-mullite. Less than 10 wt. % carbon in the form of graphite and binder is in the mix plus about 2-5 wt. % of a metal such as silicon and an effective mount of sintering aids is also present. The pressed shape is preheated to a temperature of 1000.degree. -1400.degree. C. in air to oxidize the exposed surface of the shape and then to sinter the oxidized surface to form the desired dense, carbon free surface over the entire shape or on selected surface portions thereof.
REFERENCES:
patent: 4682718 (1987-07-01), Wanatabe et al.
patent: 5198126 (1993-03-01), Lee
patent: 5348202 (1994-09-01), Lee
patent: 5348203 (1994-09-01), Andoh et al.
patent: 5370370 (1994-12-01), Benson
Benson Paul M.
DeBastiani Duane L.
Dumas Phillipe
Hanse Eric
Robinson Quentin K.
Kastler Scott
Vesuvius Crucible Company
LandOfFree
Method and compositions for making refractory shapes having dens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and compositions for making refractory shapes having dens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and compositions for making refractory shapes having dens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1023818