Title:
STRAIGHT GRATE-BASED PRE-REDUCED PELLET PREPARATION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2022/262812
Kind Code:
A1
Abstract:
Disclosed is a pre-reduced pellet preparation device and method, wherein the pre-reduced pellet preparation device comprises a straight grate system and a hydrogen-based shaft furnace reduction system; by organically combining the roasting and reduction processes of iron-containing green pellets, eliminating the pellet cooling process after roasting and the pellet heating process before reduction, and using the physical heat of the roasted pellets to meet the heat required for the heating and reduction processes, the pre-reduced pellet preparation method solves the technical problems of a low hydrogen utilization rate in the traditional direct reduction process, a high energy consumption of the pellets in the oxidizing roasting and direct reduction processes, and uneven pellet quality resulting from uneven heat of the pellets in upper and lower material layers of a traditional straight grate for pellet oxidation in a high-temperature state; the prepared pre-reduced pellets serve as blast furnace charge, so as to significantly reduce the fuel consumption and carbon emissions in the traditional steel process and create favorable conditions for the green development of the traditional process.
Inventors:
LI JIAN (CN)
MAO XIAOMING (CN)
XU WANREN (CN)
XIONG LIN (CN)
XU HAIFA (CN)
SHEN HAIJIA (CN)
LIU SIYANG (CN)
LIU FENG (CN)
YOU YIFENG (CN)
MAO XIAOMING (CN)
XU WANREN (CN)
XIONG LIN (CN)
XU HAIFA (CN)
SHEN HAIJIA (CN)
LIU SIYANG (CN)
LIU FENG (CN)
YOU YIFENG (CN)
Application Number:
PCT/CN2022/099170
Publication Date:
December 22, 2022
Filing Date:
June 16, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22B34/22; C21B13/02; C22B1/02; C22B1/242; C22B5/12; C22B34/12
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Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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