Title:
ELECTRIC ENERGY FULL-HYDROGEN FLASH REDUCTION DIRECT STEELMAKING SYSTEM AND PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/035815
Kind Code:
A1
Abstract:
An electric energy full-hydrogen flash reduction direct steelmaking system and process. The system comprises an electrolytic water hydrogen production device, a cyclone flash reduction furnace, an electric heating melting furnace, and a tail gas post-treatment device. The process is as follows: hydrogen serving as reducing gas and oxygen are prepared by water electrolysis; the oxygen and steelmaking powder are sprayed into the cyclone flash reduction furnace, and meanwhile, the hydrogen is blown into the lower part thereof; the gas and solid phases undergo a reduction reaction at 500-1500°C during the countercurrent movement in the cyclone furnace to obtain pre-reduced iron powder/iron droplets having a metallization ratio greater than 80% which enter the electric heating melting furnace for melting; the hydrogen is blown into the bottom of the electric heating melting furnace to be stirred and molten for final reduction, and continuous steelmaking is carried out; tail gas is reduced and molten, and the power is pre-heated/pre-reduced, and dust removal purification is carried out; the tail gas is purified, the oxygen is preheated, and condensation separation is carried out; the hydrogen returns to the cyclone flash reduction furnace and condensed water returns to electrolytic water to produce hydrogen. The process completely utilizes electric energy for smelting without relying on fossil fuel, completely uses hydrogen as a reducing agent, and has no pollutant emission in the process, thereby realizing efficient and cyclic utilization of raw materials, and clean smelting.
Inventors:
LI MINGMING (CN)
YANG XING (CN)
LI LIN (CN)
ZOU ZONGSHU (CN)
SHAO LEI (CN)
LI QIANG (CN)
YANG XING (CN)
LI LIN (CN)
ZOU ZONGSHU (CN)
SHAO LEI (CN)
LI QIANG (CN)
Application Number:
PCT/CN2019/105677
Publication Date:
March 04, 2021
Filing Date:
September 12, 2019
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C21B13/14; C21B13/12
Foreign References:
| CN203159661U | 2013-08-28 | |||
| CN102199680A | 2011-09-28 | |||
| CN106086280A | 2016-11-09 | |||
| CN108374067A | 2018-08-07 | |||
| CN104673954A | 2015-06-03 | |||
| US4062673A | 1977-12-13 |
Other References:
XING LI-YONG: "Gas-solid Reduction Behaviour of In-flight Fine Iron Ore Particles", CHINESE MASTER'S THESES FULL-TEXT DATABASE, 1 June 2016 (2016-06-01), CN, pages 1 - 93, XP055787322, ISSN: 1674-0246
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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