Refractory batch, in particular for the production of a shaped body, and process for producing the shaped body
AssigneeRefractechnik Holding GmbH
InventorsHans Wienand, Helge Jansen, Peter Bartha
Life of this patent
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Abstract
The invention relates to a refractory batch containing at least one refractory metal oxide component, at least one binder component, such as resin or pitch, if appropriate antioxidants, at least one carbon carrier, such as soot and/or graphite, and reinforcement fibers which are formed from a stainless steel material, which at the temperatures of use forms a coat of the refractory metal oxide on its surface, and to a shaped body made from the batch and to a process for producing the shaped body.
Claims32
A refractory batch or refractory material for producing a shaped body, comprising:
- at least one refractory metal oxide component,
- a blinder component including resin or pitch,
- antioxidants as required,
- at least one carbon carrier, and
- reinforcement fibers which are formed from a stainless steel material,
- the stainless steel material being ductile melt-spun fibers so that, at the temperatures of use, the refractory metal oxide component coats the ductile melt-spun fibers,
- whereby the reinforcement fibers do not store any significant energy of compression or deformation when the refractory batch or refractory material is pressed into the shaped body, so that any elasticity, which would cause the shaped body to return to its original shape due to restoring forces, does not occur.
A process for producing a shaped body, comprising the steps of:
- using a batch, in which:
- (1) a refractory metal oxide is classified, and
- (2) a desired grain range is put together from a plurality of grain fractions,
- mixing stainless steel fibers with one, a plurality of or all of the grain fractions until a homogenous mixture is formed,
- mixing the stainless steel with the remaining grain fractions, as required, in order to form the homogenous mixture,
- admixing a dry carbon carrier to the mixture of refractory metal oxide components and stainless steel fibers, and
- forming the stainless steel fibers from ductile melt-spun fibers so that at the temperatures of use, the refractory metal oxide components coat the ductile melt-spun fibers,
- wherein the ductile melt-spun fibers do not store any significant energy of compression or deformation when the batch is pressed into the shaped body, so that any elasticity, which would cause the shaped body to return to its original shape due to restoring forces, does not occur.
A shaped body for lining converters, casting ladles, metallurgical ladles and similar units for steel processing and treatment, at a temperature of use, comprising:
- stainless steel fibers;
- a coating or deposit of a refractory metal oxide contained in a batch;
- the batch being deposited on a surface of the stainless steel fibers;
- the batch including binder means so that once the coating has been formed, and even when the coating has been cooled, the coating is retained on the surface;
- the binder means including resin or pitch;
- and
- the stainless steel fibers being ductile melt-spun fibers to permit the coating thereon;
- whereby the ductile melt-spun fibers do not store any significant energy of compression or deformation when the batch is pressed into the shaped body, so that any elasticity, which would cause the shaped body to return to its original shape due to restoring forces, does not occur.
Dependencies are inferred from the claim text.