Title:
PRE-REDUCED PELLET PREPARATION APPARATUS AND METHOD BASED ON GRATE-ROTARY KILN
Document Type and Number:
WIPO Patent Application WO/2022/262792
Kind Code:
A1
Abstract:
The present invention provides a pre-reduced pellet preparation apparatus and method based on grate-rotary kiln. The pre-reduced pellet preparation apparatus comprises a grate-rotary kiln pellet oxidation system and a hydrogen-based shaft furnace reduction system. In the pre-reduced pellet preparation method, a roasting process and a reduction process for an iron-containing green pellet are organically combined, and a pellet cooling process after roasting and a heating process before pellet reduction are canceled; physical heat of a roasted pellet is used to satisfy heat required in the heating and reduction processes; the technical problems of a low hydrogen utilization rate and high energy consumption of pellets in oxidative roasting and direct reduction processes in traditional direct reduction processes are solved; a reduced pellet having a certain metallization rate is obtained; the prepared pre-reduced pellet is used as blast furnace burden, such that blast furnace fuel consumption and carbon emission can be significantly reduced; the method is a new, low-carbon, and green pre-reduced pellet preparation process.
Inventors:
LI JIAN (CN)
MAO XIAOMING (CN)
XIONG LIN (CN)
LIANG LISHENG (CN)
JIANG LINHAI (CN)
YI LUJIE (CN)
PENG XIN (CN)
CHEN SHENGFENG (CN)
MAO XIAOMING (CN)
XIONG LIN (CN)
LIANG LISHENG (CN)
JIANG LINHAI (CN)
YI LUJIE (CN)
PENG XIN (CN)
CHEN SHENGFENG (CN)
Application Number:
PCT/CN2022/099079
Publication Date:
December 22, 2022
Filing Date:
June 16, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C21B13/02
Foreign References:
| CN106834582A | 2017-06-13 | |||
| CN111187871A | 2020-05-22 | |||
| CN103993163A | 2014-08-20 | |||
| JPS613812A | 1986-01-09 | |||
| CN111380366A | 2020-07-07 | |||
| CN112161260A | 2021-01-01 | |||
| CN202465830U | 2012-10-03 | |||
| CN111534659A | 2020-08-14 | |||
| CN104195278B | 2016-04-13 | |||
| CN111910072A | 2020-11-10 | |||
| CN103261446B | 2014-12-10 | |||
| CN105408500A | 2016-03-16 | |||
| CN103898265B | 2015-08-12 | |||
| CN110484672A | 2019-11-22 |
Other References:
LUO HAO: "Pellet grate-rotary kiln-shaft cooled kiln technical concept", METALLURGICAL EQUIPMENT, vol. 5, 2020
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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