A method for homogeneous sintering of iron ore with ultra-high bed thickness

By controlling the particle size, composition, and heat distribution of the mixture, the synergistic effect of particle size and heat is stimulated, which solves the problem of uneven quality of sinter in ultra-high bed material, achieves homogeneous and low-carbon sintering effect, and improves fuel utilization and the uniformity and stability of sinter.

CN117210679BActive Publication Date: 2026-05-26CENT SOUTH UNIV
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Patent Information

Application Number
CN202311202143.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-18
Publication Date
2026-05-26
Estimated Expiration
2043-09-18

AI Technical Summary

Technical Problem

Existing technologies suffer from unreasonable particle size, composition, and fuel distribution in ultra-high bed sintering processes, resulting in uneven sinter quality, increased fuel consumption, and difficulty in achieving homogeneous and low-carbon effects.

Method used

By controlling the particle size, composition, and heat distribution of the mixture, the synergistic effect of particle size-heat and composition-heat is stimulated to ensure uniform liquid phase generation. A high-power mixer is used for mixing, and the fuel ratio and material distribution method are optimized to achieve uniformity and low carbonization of the sinter.

Benefits of technology

This achieves uniformity of sinter in both the longitudinal and transverse directions, improves fuel utilization, reduces fuel consumption, and enhances the quality and stability of sinter.

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Abstract

This invention discloses a method for homogeneous sintering of iron ore with ultra-high bed thickness. The method involves blending iron ore according to particle size and the composition and proportion of liquid phase masterbatch. After mixing and granulation, the ore is distributed according to different particle size proportions, components, and fuel quantity. Sintering is performed within a range of 4.0–6.0 GJ / t-raw material, yielding sintered ore. The liquid phase masterbatch accounts for 30–70% of the mixture, and is mainly composed of the granulated -3mm mixture. The resulting liquid phase after reaction comprises the following main components by mass: CaO 15–30 parts, Al₂O₃ 1–4 parts, SiO₂ 3–6 parts, and MgO 0–4 parts. Based on the mineralization characteristics of sintered ore, this method stimulates the synergistic effect of particle size, heat and composition by strictly controlling the parameter settings of particle size, composition and heat distribution of the mixture. This not only ensures the uniformity of liquid phase composition in the sintering process, but also significantly improves fuel utilization, reduces the amount of solid fuel and carbon emissions, and improves the uniformity and stability of sintered ore.
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