Design method for high-performance LF desulfurization refining slag

The method uses FactSage software to calculate and optimize LF refining slag composition, addressing on-site adjustment inefficiencies and achieving consistent desulfurization performance, enhancing production efficiency and reducing economic losses.

US20260185174A1Pending Publication Date: 2026-07-02NORTH CHINA UNIVERSITY OF TECHNOLOGY +2
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NORTH CHINA UNIVERSITY OF TECHNOLOGY
Filing Date
2025-12-17
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

The existing method of adjusting ladle furnace (LF) refining slag composition on-site for desulfurization is time-consuming and affects production, leading to economic losses due to viscosity issues and inconsistent desulfurization effects.

Method used

A method involving the use of FactSage thermodynamic software to calculate the complete melting temperature and viscosity of a CaO-Al2O3-SiO2-MgO-based refining slag, determining its desulfurization capacity, and selecting a high-performance composition through theoretical calculations and industrial verification.

Benefits of technology

Enables the production of high-performance LF desulfurization refining slag with consistent desulfurization capacity, improving production efficiency and reducing economic losses by optimizing slag composition through theoretical calculations and verification.

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Abstract

A design method for high-performance ladle furnace (LF) desulfurization refining slag is provided, including: step S1: extracting a refining slag composition of LF desulfurization refining slag, and calculating a complete melting temperature and a viscosity of the refining slag composition; step S2: based on the refining slag composition and corresponding complete melting temperature and viscosity, calculating a desulfurization capacity of each refining slag composition, and determining a desulfurization range of the refining slag composition based on desulfurization capacity results; and step S3: selecting a high-performance LF desulfurization refining slag composition based on a desulfurization capacity range of the refining slag composition, analyzing a sulfur content in steel, and completing a design of the high-performance LF desulfurization refining slag. The disclosure uses FactSage thermodynamic software to calculate the complete melting temperature and viscosity range of the refining slag, and the theoretical desulfurization capacity of the refining slag.
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