A method and system for high-temperature steel slag mineral phase online reconstruction

By mixing coal gangue and room-temperature steel slag with high-temperature liquid steel slag, and utilizing its sensible heat to reconstruct the mineral phase, the problem of low utilization rate of high-temperature steel slag was solved, achieving energy saving, carbon reduction, and the preparation of high-performance cementitious materials, thereby enhancing the synergistic benefits of the metallurgical and building materials industry chain.

CN122164733APending Publication Date: 2026-06-09SHAANXI QINDAO NEW RESOURCES DEV CO LTD +1
View PDF 5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI QINDAO NEW RESOURCES DEV CO LTD
Filing Date
2026-02-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies cannot effectively utilize the sensible heat of high-temperature steel slag for mineral phase reconstruction, resulting in energy waste and low steel slag utilization. Furthermore, existing modification methods are difficult to achieve uniform mixing and efficient conversion.

Method used

Coal gangue and room-temperature steel slag were used as remodeling materials and mixed with high-temperature liquid steel slag. The mineral phases were remodeled using their own sensible heat. High-performance cementitious materials were prepared through processes such as stirring, cooling and magnetic separation.

Benefits of technology

It has achieved energy conservation and carbon reduction, improved the utilization rate of steel slag and the performance of cementitious materials, reduced environmental pollution, connected the metallurgical and building materials industry chains, and broadened application scenarios.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure SMS_1
    Figure SMS_1
Patent Text Reader

Abstract

This invention discloses a method and system for online reconstruction of mineral phases in high-temperature steel slag, belonging to the field of steel slag resource utilization technology. The method involves crushing coal gangue and room-temperature steel slag to a particle size of 0.5 to 3 mm, mixing them at a mass ratio of 1:0.5 to 1.5 to prepare a reconstruction adjuster, and then adding the reconstruction adjuster and high-temperature liquid steel slag (temperature above 1350℃) to a mixing furnace at a mass ratio of 0.1 to 0.5:1. After settling, the mineral phase reconstruction is completed, converting free calcium oxide into dicalcium silicate and tricalcium silicate, magnesium oxide, ferrous oxide, and manganese oxide into the RO phase, and ferric oxide into ferrous oxide and elemental iron. The mixture after the reaction is cooled to below 500℃, then crushed, magnetically separated, and ground to a specific surface area of ​​400 square meters per kilogram to obtain a cementitious material. This invention utilizes the sensible heat of the high-temperature steel slag itself, eliminating the need for additional heating, achieving high-value utilization of solid waste. The prepared cementitious material exhibits high hydration activity and good volume stability. The process is simple and easy to implement, contributing to the metallurgical industry's achievement of dual-carbon goals.
Need to check novelty before this filing date? Find Prior Art