Refractory composition

EP4762025A1Pending Publication Date: 2026-06-24HENKEL KGAA

Patent Information

Authority / Receiving Office: EP · EP
Patent Type: Applications
Current Assignee / Owner: HENKEL KGAA
Filing Date: 2024-08-05
Publication Date: 2026-06-24

AI Technical Summary

Technical Problem

Conventional refractory runners used in the iron smelting industry suffer from limited durability due to high thermal shock, corrosion, and abrasion from molten steel, leading to short operational lifetimes and frequent downtime for repair and replacement.

Method used

A castable refractory composition comprising 65-85 wt.% alumina particles with a heterogeneous particle shape distribution, including convex spherical and irregular alumina particles, along with 5-25 wt.% silica and up to 10 wt.% zirconium component, which provides enhanced abrasion and corrosion resistance, as well as reduced frictional resistance to fluid flow.

Benefits of technology

The refractory composition exhibits improved durability, thermal-mechanical strength, and reduced frictional resistance, leading to extended operational lifetimes and reduced downtime for refractory runners in high-temperature, corrosive, and abrasive environments.

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Abstract

A refractory composition includes a blend of alumina and silica, wherein the alumina is provided with a heterogeneous particle shape distribution among a plurality of alumina species. One alumina species includes particles with a convex outer surface within a substantially monodisperse particle size distribution. The alumina of the refractory composition is further provided with a multimodal particle size distribution.

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