Method of setting temperature of continuous heating furnace and method of controlling furnace temperature

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(11)

EP 2 511 387 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A3)

(48)	Corrigendum issued on:
	02.01.2013 Bulletin 2013/01

(88)	Date of publication A3:
	31.10.2012 Bulletin 2012/44

(43)	Date of publication:
	17.10.2012 Bulletin 2012/42

(21)	Application number: 12163237.6

(22)	Date of filing: 04.04.2012

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International Patent Classification (IPC):

C21D 11/00^(2006.01)
F27B 9/40^(2006.01)
F27B 9/36^(2006.01)
C21B 13/10^(2006.01)

F27B 9/16^(2006.01)
F27D 19/00^(2006.01)
F27D 99/00^(2010.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

11.04.2011 JP 2011087565

(71)	Applicants:
	Nippon Steel Engineering Co., Ltd Tokyo 141-8604 (JP) Nittetsu Plant Designing Corporation Kitakyushu-shi Fukuoka 804-0002 (JP)

(72)	Inventors:
	Tamaru, Koji Fukuoka-ken (JP) Oishi, Takuya Fukuoka-ken (JP) Fukuda, Yukihisa Fukuoka-ken (JP)

(74)	Representative: Vossius & Partner
	Siebertstrasse 4 81675 München 81675 München (DE)

(54)	Method of setting temperature of continuous heating furnace and method of controlling furnace temperature

(57) A space from a charging hole to a discharge hole of a continuous heating furnace is divided into zones. A furnace temperature is assumed for each zone and a plurality of furnace temperature patterns are set. A metallization rate α^OUT at the discharge hole is calculated for each furnace temperature pattern, using the time functions of the metallization rate α and the carbon content rate β of a raw material calculated in advance using a test. The necessary amount of heat applied to the continuous heating furnace is calculated for the furnace temperature patterns in which the calculated metallization rate α^OUT is greater than or equal to a target value. The furnace temperature pattern which realizes the minimum necessary amount of heat applied is set as the optimal furnace temperature pattern. A fuel supplied to a burner is controlled based on the optimal furnace temperature pattern.