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 (JP)
OGASAWARA YASUSHI (JP)
SATO TAKESHI (JP)
OGASAWARA YASUSHI (JP)
SATO TAKESHI (JP)
Application Number:
PCT/JP2019/008261
Publication Date:
October 03, 2019
Filing Date:
March 04, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00; C21B7/18; C21B7/20; F27B1/20; F27D3/10
Domestic Patent References:
| WO2013172045A1 | 2013-11-21 |
Foreign References:
| JP2005290511A | 2005-10-20 | |||
| JPS5243169B2 | 1977-10-28 | |||
| JPH02236210A | 1990-09-19 | |||
| JPH0987710A | 1997-03-31 | |||
| JPH07268411A | 1995-10-17 | |||
| JPH03211210A | 1991-09-17 | |||
| JP2004107794A | 2004-04-08 | |||
| JPS57207105A | 1982-12-18 | |||
| JP3948352B2 | 2007-07-25 |
Other References:
SHIMIZU ET AL.: "A basic study of the control of a coke in deadman of a blast furnace", TETSU-TO-HAGANE, THE IRON AND STEEL INSTITUTE OF JAPAN, vol. 73, 1987, pages S754
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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