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Title:
SINTERED ORE MANUFACTURING METHOD AND SINTERED ORE MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/132183
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a sintered ore manufacturing method providing a low-temperature melt generation accelerator so as to increase the binding force between sintering material particles; and a sintered ore manufacturing apparatus. The method for manufacturing sintered ore comprises the steps of: i) forming a first sintering material layer by layering a sintering material; ii) providing a low-temperature melt generation accelerator having a particle size larger than that of the sintering material; iii) layering a second sintering material layer on the first sintering material layer by mixing a sintered ore material and the low-temperature melt generation accelerator; and iv) sintering the first sintering material layer and the second sintering material layer together. In the step of providing the low-temperature melt generation accelerator, the low-temperature melt generation accelerator comprises 60-70 wt% of an iron compound, and the difference between the softening temperature and the melting temperature of the low-temperature melt generation accelerator is 10°C or less. In the sintering step, a calcium ferrite-based sintering melt is generated by the low-temperature melt generation accelerator, and the iron compound is obtained from exhaust gas discharged from a reduction furnace, which converts iron ore into reduced iron by receiving a reduction gas.

Inventors:
KIM, Seung Wan (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
JEONG, Hae Kwon (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
KIM, Jung Ah (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
Application Number:
KR2018/011275
Publication Date:
July 04, 2019
Filing Date:
September 21, 2018
Export Citation:
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Assignee:
POSCO (6261, Donghaean-ro Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
International Classes:
C22B1/16; F27B21/00; F27D3/10
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (115 Teheran-ro, Gangnam-gu, Seoul, 06134, KR)
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