Title:
電気炉におけるスクラップ溶け落ち判定方法、電気炉における炉壁損耗量推定方法、プログラム及びシステム
Document Type and Number:
Japanese Patent JP6702014
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To effectively use supplying power to an electric furnace to contribute to long life of a furnace refractory.SOLUTION: A temperature is determined at a plurality of positions inside of a furnace wall and an outer face of the furnace wall of an electric furnace 1 by thermocouples 5, thermal flux in an inner peripheral surface 1a of the furnace wall is calculated based on the measured temperature and initiation of burn through of scraps is determined based on the thermal flux in the furnace wall inner face 1a. A cross point (hot spot 7) between a linear 6 which is orthogonal to a center axis S of the electric furnace 1 and passes a center axis of an arc electrode 3 and the inner peripheral face 1a of the furnace wall is determined, and a plurality of temperature detection edges 5 are arranged in an area in 0.2 L in a direction parallel to the center axis S of the electric furnace 1 and a direction with right angle with the direction respectively, where distance from a center of the arc electrode 3 to the hotspot 7 corresponding to the same is L, and above a hot water surface of molten steel when all scraps are molten.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
Tadayuki Ito
Junichi Nakagawa
Katsuhiko Kato
Itakusu Motokuni
Yuji Hiramoto
Junichi Nakagawa
Katsuhiko Kato
Itakusu Motokuni
Yuji Hiramoto
Application Number:
JP2016121976A
Publication Date:
May 27, 2020
Filing Date:
June 20, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21C5/52; F27B3/08; F27B3/28; F27D21/00
Domestic Patent References:
| JP2005134383A | ||||
| JP4151489A | ||||
| JP2008116066A | ||||
| JP2012207904A |
Attorney, Agent or Firm:
Takayoshi Kokubun