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US 6,660,673 B1Granted
Use of particulate materials containing TiO2 in refractory products
AssigneeSachtleben Chemie GmbH
InventorsDjamschid Amirzadeh-Asl, Dieter Fünders
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Abstract
In order to reduce wear on refractory linings due to corrosion and the infiltration of slags and molten metals, particulate materials containing TiO2 are added to the refractory products consisting of a mixture of aggregates and binding agents.
Claims6
A refractory composition comprising
- a mixture of aggregate materials, at least one binding agent and an additive, said additive comprising synthetic particulate TiO2 with an average grain size davg of 0.2 to 2000 μm in amount up to 90 wt.-% with respect to said aggregate materials, and
- an iron oxide in an amount us to 70 wt.-%, with respect to said additive, wherein, upon employment, said TiO2 reacts with at least one of nitrogen and carbon, while in contact with iron, to form one or more of titanium carbide, titanium nitride and titanium carbonitride, wherein said aggregate materials are substantially Al2 O3, SiO2, and alumosilicates.
A refractory composition comprising
- a mixture of aggregate materials, at least one binding agent and an additive, said additive comprising synthetic particulate TiO2 with an average grain size davg of 0.2 to 2000 μm in amount up to 90 wt.-% with respect to said aggregate materials, and
- an iron oxide in an amount up to 70 wt.-%, with respect to said additive, wherein, upon employment, said TiO2 reacts with at least one of nitrogen and carbon, while in contact with iron, to form one or more of titanium carbide, titanium nitride and titanium carbonitride, wherein said aggregate materials are substantially magnesia, dolomite, chrome magnesia, chromium ore and spinel.
A refractory composition comprising
- a mixture of aggregate materials, at least one binding agent and an additive, said additive comprising synthetic particulate TiO2 with an average grain size davg of 0.2 to 2000 μm in amount up to 90 wt.-% with respect to said aggregate materials, and
- an iron oxide in an amount up to 70 wt.-%, with respect to said additive, wherein, upon employment, said TiO2 reacts with at least one of nitrogen and carbon, while in contact with iron, to form one or more of titanium carbide, titanium nitride and titanium carbonitride, wherein said aggregate materials are substantially silicon carbide, silicon nitride, zirconium silicate, zirconium oxide borates and boron oxide.
Dependencies are inferred from the claim text.