Title:
CYCLONE FLASHING-SPEED REDUCTION DIRECT STEELMAKING SYSTEM AND PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/035821
Kind Code:
A1
Abstract:
Provided are a cyclone flashing-speed reduction direct steelmaking system and process. The system comprises a carbon monoxide preparation device, a cyclone flashing-speed reduction furnace, an electric heating smelting separation furnace and a piece of tail gas post-treatment equipment, wherein the piece of tail gas post-treatment equipment comprises a pre-heating/pre-reduction device, a tail gas dedusting purification device, a heat exchanger and a tail gas separation device. The process comprises carrying out electrochemical reduction on carbon dioxide to prepare carbon monoxide and oxygen; spraying the carbon monoxide, the oxygen, an iron ore powder and a flux into a cyclone flashing-speed reduction furnace, and carrying out reduction at 900 to 1500℃ to obtain pre-reduced iron powder/iron drops with a metallization ratio of larger than 70%; introducing same into an electric heating smelting separation furnace so as to carry out smelting separation and final reduction; sequentially pre-heating/pre-reducing the iron ore powder and the flux through reduced and smelted tail gas, dedusting, pre-heating the oxygen, and separating same to obtain carbon monoxide and carbon dioxide; and returning same to a cyclone furnace and a carbon dioxide reduction device for recycling, respectively. The process uses electric energy for smelting and does not rely on fossil fuels, the carbon monoxide is recycled, no pollutant and carbon dioxide is discharged in the process, and clean smelting is realized.
Inventors:
LI LIN (CN)
LI MINGMING (CN)
YANG XING (CN)
ZOU ZONGSHU (CN)
SHAO LEI (CN)
LI QIANG (CN)
LI MINGMING (CN)
YANG XING (CN)
ZOU ZONGSHU (CN)
SHAO LEI (CN)
LI QIANG (CN)
Application Number:
PCT/CN2019/105867
Publication Date:
March 04, 2021
Filing Date:
September 16, 2019
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C21B13/00; C25B1/00
Foreign References:
| CN103627836A | 2014-03-12 | |||
| CN101973521A | 2011-02-16 | |||
| CN104673954A | 2015-06-03 | |||
| JP2010265485A | 2010-11-25 | |||
| JPS62284005A | 1987-12-09 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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