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Patent Searching and Data


Title:
METHOD FOR LOADING RAW MATERIALS INTO BLAST FURNACE
Document Type and Number:
WIPO Patent Application WO/2019/187997
Kind Code:
A1
Abstract:
The present invention prevents furnace core coke from becoming fine particles and promotes an ore reduction reaction when forming a mixed layer of coke lumps and an ore within a furnace in a blast furnace comprising a bell-less loading device. Provided is a method for loading raw materials into a blast furnace provided with a bell-less loading device that comprises a plurality of main hoppers at the furnace top and an auxiliary hopper having a smaller capacity than the main hoppers. When ore loaded into one or more of the plurality of main hoppers is discharged and sequentially loaded from a furnace center side to a furnace wall side by a rotating chute, only ore is loaded from the rotating chute after starting loading of the ore until loading of at least 15 mass% of the total amount of the ore to be loaded in one batch is completed, the discharge of coke lumps loaded into the auxiliary hopper is subsequently started from a discretionary point in time, and ore and coke lumps are subsequently loaded from the rotating chute during a discretionary period.

Inventors:
ICHIKAWA Kazuhira (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
OGASAWARA Yasushi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
SATO Takeshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2019/008261
Publication Date:
October 03, 2019
Filing Date:
March 04, 2019
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
C21B5/00; C21B7/18; C21B7/20; F27B1/20; F27D3/10
Foreign References:
JP2005290511A2005-10-20
JPS5243169B21977-10-28
JPH02236210A1990-09-19
JPH0987710A1997-03-31
JPH07268411A1995-10-17
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JFE Techno-Research Corporation 7-1, Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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