Process for the Production of Refractory Shaped Bodies or Masses

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This invention relates to refractory (fire-resistant) molded bodies or mixes and a method for creating a highly strong binding phase within materials composed of oxides, non-oxides, and/or carbon materials like magnesium oxide, aluminum oxide, silicon carbide, and others. The key innovation is the addition of fine titanium dioxide or similar titanium compounds (and optionally metallic particles) into the binding matrix to form titanium carbide and titanium carbonitride phases during heat treatment. These phases significantly improve the mechanical, thermal, and chemical resistance of the refractory products, especially at high temperatures.

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• Lining material for metal processing vessels, such as converters and ladles in the steel industry.
• Manufacture of high-strength slide plates, stoppers, and nozzles for continuous casting systems.
• Refractory bricks or structures for use in high-temperature furnaces, kilns, and reactors in industries like metallurgy, cement production, chemical processing, and waste incineration.
• Production of durable pipes and insulation for use in aggressive, high-temperature environments.
• Replacement of traditional refractory materials that suffer from rapid wear or oxidation under extreme thermal or corrosive conditions.

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• Improved mechanical strength and stability of the refractory products, enabling longer service life in harsh thermal environments.
• Enhanced resistance to oxidation, corrosion, erosion, and thermal shock, reducing the frequency and cost of maintenance or replacement.
• Ability to tailor properties for specific temperature ranges or application needs by adjusting the type and amount of titanium compounds and metallic additives.
• Formation of stable, crystalline binding phases (e.g., TiC, TiCN) at high temperatures, which reinforce the weakest part (the binder) in conventional refractories.
• Greater versatility, as the process and compositions can be used for both carbon-containing and non-carbon refractory systems.

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Patent Abstract

The invention relates to fireproof molded articles or materials as well as a method for obtaining a high-strength binding phase in magnesium oxide, aluminum oxide, zirconia mullite, zirconium dioxide, magnesium aluminate spinel, bauxite, yttrium oxide, silicon carbide, silicon nitride, or boron nitride products, or mixtures of carbon-bonded products, such as pressed carbon-bonded rocks, carbon-bonded slide plates or carbon-bonded submerged nozzles or cast carbon-containing and/or carbon-bonded products or carbon-bonded stoppers, which have improved mechanical, thermal, and chemical properties. The binding matrix of the fireproof molded articles or materials contains titanium carbide phases and/or titanium carbonitride phases. The fireproof molded articles or materials are composed of oxidic and/or non-oxidic and/or carbon-containing fireproof grains based on a carbonized mixture and a binding agent to which fine-grained titanium dioxide, ilmenite, FeTiO3, CaTiO3, MgTiO3, BaTiO3, or a combination thereof, or additional particles of one or several elemental metals are added.