Composition for use in a steel making process

EP4771195A1Pending Publication Date: 2026-07-08LHOIST RECH & DEV SA
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
LHOIST RECH & DEV SA
Filing Date
2024-08-30
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

The steelmaking industry faces challenges in recycling and reusing by-products due to specific requirements that make it difficult to integrate recycled materials without compromising the quality of the end product.

Method used

A composition is developed by mixing steel scale by-products with a first additive containing calcium oxide, achieving a weight ratio of calcium oxide to free water of at least 1.50, thereby reducing free water content to less than 5.0 wt.%, making it suitable for use in steelmaking processes.

Benefits of technology

The composition can be safely used as a raw material in steelmaking processes, improving process yield and reducing the need for additional additives, while allowing for the recycling and reuse of high-value metals and alloys.

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Patent Text Reader

Abstract

The present invention relates to a composition for use in a steel making process [composition (C), herein after], wherein said composition (C) is prepared by mixing (i) at least one steel scale by-product [compound (SSB), herein after] which comprises equal to or more than 35.0 wt. % of free water, relative to the total weight of the compound (SSB) and (ii) at least one first additive in an amount providing a weight ratio of calcium oxide to the free water present in the compound (SSB) equal to or more than 1.50, wherein said first additive comprises calcium oxide in an amount of at least 80.0 wt. %, relative to the total weight of the first additive. The composition (C) after mixing comprises free water in an amount equal to or less than 5.0 wt. %, relative to the total weight of the composition (C).
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