Title:
電炉ダストからの鉄および亜鉛の回収方法およびその装置
Document Type and Number:
Japanese Patent JP6896011
Kind Code:
B2
Abstract:
To efficiently and stably recover high-grade zinc of JIS distilled zinc metal class 1 from a reduction treatment gas containing metallic zinc vapor generated when reduced iron is produced from electric furnace dust containing iron oxides and zinc oxides.SOLUTION: The present invention: preheats and dries a charcoal-containing briquette produced by mixing and molding electric furnace dust containing iron oxides and zinc oxides, a carbonaceous material, and a binder; further heats the charcoal-containing briquette in an externally heated rotary kiln and reduces iron oxides to produce reduced iron; recovers and removes lead from the reduction treatment gas generated at that time; and then recovers zinc from the reduction treatment gas; thereby enabling the recovery of high-grade zinc of JIS distilled zinc metal class 1 from the electric furnace dust. Further, by recovering and removing lead and then reforming CO2 into CO, zinc can be recovered more efficiently.SELECTED DRAWING: Figure 1
Inventors:
Seita Uekawa
Application Number:
JP2019063655A
Publication Date:
June 30, 2021
Filing Date:
March 28, 2019
Export Citation:
Assignee:
Tetsugen Co., Ltd.
International Classes:
C22B19/30; C21B13/08; C22B1/245; C22B5/10; C22B7/02
Domestic Patent References:
| JP4052234A | ||||
| JP54026221A | ||||
| JP2017025376A | ||||
| JP2000212630A |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito