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1. WO2018151078 - METHOD FOR DETECTING SLAG IN MOLTEN STEEL FLOW

Publication Number WO/2018/151078
Publication Date 23.08.2018
International Application No. PCT/JP2018/004831
International Filing Date 13.02.2018
IPC
C21C 5/46 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel
28Manufacture of steel in the converter
42Constructional features of converters
46Details or accessories
G01N 21/17 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
G01N 33/20 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
20Metals
CPC
C21C 5/46
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel ; or stainless steel
28Manufacture of steel in the converter
42Constructional features of converters
46Details or accessories
G01N 2021/1765
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1765Method using an image detector and processing of image signal
G01N 21/17
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
G01N 33/2028
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
20Metals
202Constituents thereof
2028Metallic constituents
G01N 33/205
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
20Metals
205in liquid state, e.g. molten metals
Applicants
  • 日本製鉄株式会社 NIPPON STEEL CORPORATION [JP]/[JP]
Inventors
  • 楠 智行 KUSUNOKI Tomoyuki
  • 宮▲崎▼ 貴大 MIYAZAKI Takahiro
Agents
  • 棚井 澄雄 TANAI Sumio
  • 寺本 光生 TERAMOTO Mitsuo
  • 勝俣 智夫 KATSUMATA Tomoo
  • 山口 洋 YAMAGUCHI Yoh
Priority Data
2017-02544014.02.2017JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR DETECTING SLAG IN MOLTEN STEEL FLOW
(FR) PROCÉDÉ POUR LA DÉTECTION DE SCORIES DANS UN FLUX D'ACIER LIQUIDE
(JA) 溶鋼流中のスラグ検出方法
Abstract
(EN)
This method for detecting slag in a molten steel flow includes: a histogram creation step for creating a histogram for each captured image of a molten steel flow containing molten steel and slag; a maximum peak detection step for detecting a maximum peak in the histogram; an intermediate peak detection step for detecting an intermediate peak in the histogram; an intermediate peak counting step for counting the number Nh of intermediate peaks exhibiting a higher concentration parameter than the concentration parameter of the maximum peak, and also counting the number Nl of intermediate peaks exhibiting a concentration parameter which is smaller than the concentration parameter of the maximum peak; and a maximum peak type determination step for determining the maximum peak type according to the magnitude correlation between the number Nl and the number Nh.
(FR)
L'invention concerne un procédé pour la détection des scories dans un flux d'acier liquide, le procédé comprenant : une étape de création d'un histogramme, destinée à créer un histogramme pour chaque image capturée d'un flux d'acier liquide contenant de l'acier liquide et des scories; une étape de détection du pic maximal, destinée à détecter un pic maximal dans l'histogramme; une étape de détection d'un pic intermédiaire, destinée à détecter un pic intermédiaire dans l'histogramme; une étape de comptage des pics intermédiaires, destinée à compter le nombre Nh de pics intermédiaires présentant un paramètre de concentration plus grand que le paramètre de concentration du pic maximal, et également à compter le nombre Nl de pics intermédiaires présentant un paramètre de concentration plus faible que le paramètre de concentration du pic maximal; et une étape de détermination du type de pic maximal, destinée à déterminer le type de pic maximal en fonction de la corrélation d'amplitude entre les valeurs du nombre Nl et du nombre Nh.
(JA)
この溶鋼流中のスラグ検出方法は、溶鋼およびスラグを含む溶鋼流の撮像画像についてヒストグラムを作成するヒストグラム作成工程と;前記ヒストグラムの最大ピーク点を検出する最大ピーク点検出工程と;前記ヒストグラムの中間ピーク点を検出する中間ピーク点検出工程と;前記最大ピーク点の濃度パラメータよりも大きな濃度パラメータを有する前記中間ピーク点の個数Nhと、前記最大ピーク点の前記濃度パラメータよりも小さな濃度パラメータを有する前記中間ピーク点の個数Nlとを計数する中間ピーク点計数工程と;前記個数Nlと前記個数Nhとの大小関係により、前記最大ピーク点の種別を判定する最大ピーク点種別判定工程と;を有する。
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