KR950014336A - Ambient temperature setting method in furnace for steel temperature control - Google Patents

Ambient temperature setting method in furnace for steel temperature control Download PDF

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KR950014336A
KR950014336A KR1019930023749A KR930023749A KR950014336A KR 950014336 A KR950014336 A KR 950014336A KR 1019930023749 A KR1019930023749 A KR 1019930023749A KR 930023749 A KR930023749 A KR 930023749A KR 950014336 A KR950014336 A KR 950014336A
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temperature
furnace
steel
setting
atmosphere
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KR960006030B1 (en
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홍성철
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조말수
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Heat Treatment Processes (AREA)

Abstract

본 발명은 열간압연 공정에 있어서 강재온도 제어를 위해 가열로내 분위기 온도를 설정하는 방법에 관한 것으로써, 분위기 온도 설정방법과 강재 온도 계산방법을 개선함으로써, 계산시간을 단축하여 빠른주기의 제어와 보다 정확한 강재 추출온도 및 균열도 예측에 의해 강제의 추출목표온도와 균열도를 얻을 수 있는 가열로내 분위기 온도 설정방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method of setting an atmosphere temperature in a furnace for controlling a steel temperature in a hot rolling process. By improving the atmosphere temperature setting method and the steel temperature calculation method, the calculation time can be shortened to control the fast cycle and The purpose of the present invention is to provide a method for setting an atmosphere temperature in a furnace to obtain a forced extraction target temperature and crack degree by predicting steel extraction temperature and crack degree more accurately.

본 발명은 n개의 대로 구성된 가열로에서 가열로의 능력을 고려하여 가열로 입구로부터 k개의 대는 추출온도만을 고려하여 각대의 분위기 온도를 설정하고 n-k개의 대는 추출온도와 균열도를 고려하여 각대의 분위기 온도를 설정하여 가열로내 분위기 온도를 설정하는 방법을 그 요지로 한다.In the present invention, in consideration of the capacity of the furnace in the furnace consisting of n units, k atmospheres from the furnace inlet are set by considering only the extraction temperature, and nk stages are considered in each atmosphere by considering the extraction temperature and the degree of cracking. The main point is to set the temperature to set the ambient temperature in the furnace.

Description

강재온도제어를 위한 가열로내 분위기 온도설정방법Ambient temperature setting method in furnace for steel temperature control

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 통상의 가열로는 나타내는 개략도,1 is a schematic view showing a conventional heating furnace,

제2도는 종래의 방법에 따라 강재온도제어를 한 경우 가열시간에 따른 가열로분위기온도, 강재온도 및 균열도 변화를 나타내는 그래프,2 is a graph showing changes in furnace atmosphere temperature, steel temperature and cracking degree according to heating time when steel temperature control is performed according to a conventional method.

제3도는 본 발명에 따라 강재온도 제어를 한 경우 가열시간에 따른 가열로 분위기온도, 강재온도 및 균열도 변화를 나타내는 그래프.3 is a graph showing a change in the furnace atmosphere temperature, the steel temperature and the crack degree according to the heating time when the steel temperature control according to the present invention.

Claims (3)

열간압연 공정에서 강재온도를 제어하기 위하여 n개의 대(Zone)로 이루어진 가열로내 분위기 온도를 설정하는 방법에 있어서, 가열로 입구로부터 K개의 대는 강재의 예상 추출온도만을 고려하여 각대의 분위기 온도를 설정하고, 그리고 n-k개의 대는 강재의 예상 추출온도와 예상균열도를 고려하여 각대의 분위기 온도를 설정하는 것을 특징으로 하는 강재온도제어를 위한 가열로내 분위기 온도 설정방법.In the method of setting the atmosphere temperature in the furnace consisting of n zones in order to control the steel temperature in the hot rolling process, the K zones from the inlet of the furnace are set in consideration of the expected extraction temperature of the steel. And setting the ambient temperature in each furnace in consideration of the expected extraction temperature and the expected cracking degree of the steel in nk units. 제1항에 있어서, 입구로부터 K개의 각대의 분위기 온도는, 하기식(1)을 Runge-Kutta법에 의해 풀어 구한 강재의 예상추출온도를 하기식(5)에 대입하여 구한 온도값으로 설정하고;The atmosphere temperature of K angles from the inlet is set to a temperature value obtained by substituting the expected extraction temperature of the steel obtained by solving the following formula (1) by the Runge-Kutta method in the following formula (5): ; 상기 n-K개의 각대의 분위기 온도는, 하기 식(2)를 차분식화한 하기식(3)에 의해 메쉬(mesh)들의 온도를 구한 다음, 이 메쉬들의 평균온도값을 강재의 예상추출온도(Tm)로, 그리고 메쉬의 최대온도값과 최소온도값의 차를 강재의 예상 균열도(Sm)로 하고 이 예상 추출온도(Tm)와 예상균열도(Sm)를 하기식(6)에 대입하여 구한 온도값으로 설정하고;The ambient temperature of each of the nK angles is obtained by calculating the temperature of the meshes by the following equation (3) by differential equation (2), and then calculating the average temperature value of the meshes as the expected extraction temperature (T m) of steel. ), And the difference between the maximum temperature value and the minimum temperature value of the mesh is the estimated cracking degree (S m ) of the steel, and the estimated extraction temperature ( Tm ) and the estimated cracking degree (S m ) are substituted into the following equation (6). Set to a temperature value obtained by; 그리고 상기 식(3)에 있어 Δt가, 하기식(4)In the formula (3), Δt is represented by the following formula (4) 와 같이 선정되는 것을 특징으로 하는 강재 온도제어를 위한 가열로내 분위기 온도설정방법.Method for setting the atmosphere temperature in the furnace for steel temperature control, characterized in that the selected. 제2항에 있어서, 식(5) 및 (6)에 있어 계수 a와 b가 열손실이 적은 대 순으로 큰값이 설정되는 것을 특중으로 하는 강재온도 제어를 위한 가열로내 분위기 온도설정방법.The method for setting the atmosphere temperature in a furnace according to claim 2, wherein the coefficients a and b are set in large order in the order of low heat loss in equations (5) and (6). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930023749A 1993-11-09 1993-11-09 Temperature fixing method of heating furnace atmosphere Expired - Fee Related KR960006030B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930023749A KR960006030B1 (en) 1993-11-09 1993-11-09 Temperature fixing method of heating furnace atmosphere

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Application Number Priority Date Filing Date Title
KR1019930023749A KR960006030B1 (en) 1993-11-09 1993-11-09 Temperature fixing method of heating furnace atmosphere

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KR950014336A true KR950014336A (en) 1995-06-15
KR960006030B1 KR960006030B1 (en) 1996-05-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010082A (en) * 1999-07-15 2001-02-05 이구택 Combustion control method for reheating furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010082A (en) * 1999-07-15 2001-02-05 이구택 Combustion control method for reheating furnace

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