A method of controlling the quality of sintered ore

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By controlling the fuel particle size and moisture content, adjusting the fuel addition amount, and combining the quality and ratio of flux raw materials, the problem of unstable sinter quality was solved, thereby improving the stability and production efficiency of blast furnace smelting.

CN117025944BActive Publication Date: 2025-12-30SD STEEL RIZHAO CO LTD

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Patent Information

Application Number: CN202310924554.X
Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner
Filing Date: 2023-07-26
Publication Date: 2025-12-30
Estimated Expiration: 2043-07-26

Application Information

Patent Timeline

26 Jul 2023

Application

CN202310924554.X

30 Dec 2025

Publication

CN117025944B

IPC: C22B1/16

CPC: C22B1/16; Y02P10/20

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Application Domain

Process efficiency improvement

Technology Topics

Iron(II) oxideAnthracite

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AI Technical Summary

Technical Problem

Large fluctuations in the composition of sinter raw materials result in poor quality stability of the produced sinter, affecting the blast furnace smelting and the quality of steel products.

Method used

The ferrous oxide content is stabilized by controlling the fuel particle size and moisture content and adjusting the fuel addition amount; the basicity of sinter is adjusted by controlling the quality and ratio of flux raw materials and using a combination of quicklime, dolomite, limestone and other materials as flux.

Benefits of technology

This improved the quality stability of sinter, increased the production efficiency and iron output of blast furnace smelting, and avoided quality fluctuations caused by fluctuations in raw material composition.

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Abstract

The present application relates to the field of metallurgy, in particular to a kind of control method for stabilizing sinter quality.Sinter is formed by sintering after sintering raw materials, and the sintering raw materials include iron-containing ore powder, fuel and flux.The content of ferrous oxide in sinter is controlled by controlling the particle size and moisture content of fuel and adjusting the amount of fuel added, and the alkalinity of sinter is controlled by controlling the quality of flux raw materials and adjusting the ratio of flux raw materials.The fuel is sintering anthracite, and the flux raw materials include combinations of quicklime, dolomite and limestone.The present application controls the content of ferrous oxide in sinter by controlling the particle size and moisture content of fuel and adjusting the amount of fuel added, and controls the alkalinity of sinter by controlling the quality of flux raw materials and adjusting the ratio of flux raw materials, thereby achieving stable control of the alkalinity and content of ferrous oxide in sinter, avoiding large-scale fluctuations in sinter quality, and improving the quality stability of sinter.

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