US3591296A - Apparatus for measuring slopping and spitting conditions of steel-making furnace - Google Patents

Apparatus for measuring slopping and spitting conditions of steel-making furnace Download PDF

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Publication number
US3591296A
US3591296A US721565A US3591296DA US3591296A US 3591296 A US3591296 A US 3591296A US 721565 A US721565 A US 721565A US 3591296D A US3591296D A US 3591296DA US 3591296 A US3591296 A US 3591296A
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United States
Prior art keywords
slopping
spitting
steel
conditions
measuring
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Expired - Lifetime
Application number
US721565A
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English (en)
Inventor
Kenzo Kunioka
Takasji Tada
Ryoichiro Imai
Seigo Ando
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JFE Engineering Corp
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Nippon Kokan Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0037—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
    • G01J5/004—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids by molten metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0044—Furnaces, ovens, kilns
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077—Imaging

Definitions

  • This invention relates to apparatus for measuring slopping and spitting conditions during operation of steel-making furnaces such as a Basic Oxygen Furnace, whereby to theoretically analyze sloppin g and spitting conditions to determine the main factors affecting yield and the like, thus determining more detailed operating patterns to produce the desired end product.
  • Another object is to provide an electro-optical device for measuring slopping.
  • FIG. 1 is a diagrammatic representation of one embodiment of the measuring apparatus embodying this invention
  • FIG. 2 is a block diagram showing electronic devices utilized in the embodiment shown in FIG. 1;
  • FIG. 3A and 3B are charts showing slopping and spitting conditions in an actual operation.
  • the apparatus illustrated in the accompanying drawing is of the type wherein the sloppings and spittings (slag and steel) are detected by an electro-optical device (industrial television camera, photoelectric tube or infrared ray detector) and are then converted into electric values by means of an electronic device 4 and recorded.
  • an industrial television device 2 is provided to respond to light rays emitted from said sloppings and spittings passing through light receiving surface 1 beneath the mouth of the BOP, thus converting the received light rays into electrical values.
  • a slit is provided for the lens system and the light receiving surface is limited to the position shown in FIG. I.
  • the output signals from television device 2 are passed through a gate circuit 11 as shown in FIG. 2, to eliminate external electrical disturbances from the source of supply.
  • signals are then supplied to a clipper circuit 12, which cuts off signals caused by external disturbances such as reflected light and eliminates signals corresponding; to a brightness less than a predetermined value. Only signals corresponding to a predetermined value of brightness corresponding to slopping and spittings are passed through clipper l2.
  • pulses caused by light from various directions are integrated with reference to the light receiving surface.
  • the output from the clipper 12 is passed through a pulse expanding circuit 13 and then through an integrating circuit 14.
  • the output thereof is fed via a coupling circuit 15 to a counter 5 (shown in FIG. ll) to be evaluated.
  • Circuit 15 is preferably a discharge circuit which, when a capacitor contained therein is charged to a predetermined level, generates a pulse by discharging the capacitor.
  • Counter 5 counts these pulses.
  • brightness is a function of the number of pulses counted.
  • a portion of the output of circuit 14 (shown in detail in FIG. 2) is amplified by an amplifier 6 and is then recorded by a suitable device such as a three-element type oscillograph 7.
  • electronic devices 2 and 4 are energized by a constant voltage source 3.
  • FIG. 3 shows the results of measurements of said sloppings.
  • FIGS. 3A and 3B show the results of blowing the same type of steel but with different operators. The use of different operators has resulted in a different time of charging auxiliary raw materials as well as different oxygen pressures, thus bringing about different slopping conditions.
  • FIG. 3A the slopping and spitting volume is small whereas the slopping is large in the case shown in FIG. 3B. This means that the tapping yield has been reduced in the case of FIG. 38.
  • the conditions are recorded to assure correct operation of the operator and in addition, investigations are made into the relationship between the amount of slopping and the yield of steel.
  • the signal pulses representing slopping and spitting conditions are integrated, counted and recorded as shown in FIG. 1.
  • the oxygen pressure, the period and amount of charging auxiliary raw materials fluorspar, limestone and iron ore) are recorded to clarify major causes influencing the slopping and spitting whereby to prepare better operating patterns.
  • means for measuring the flash brightness of light reflected from the slag and molten steel and which corresponds to said slopping and spitting comprising:
  • electro-optical means generating a signal responsive to said reflected light
  • pulse expanding means coupled to the output of said clipper circuit means

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Biochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US721565A 1967-04-13 1968-04-12 Apparatus for measuring slopping and spitting conditions of steel-making furnace Expired - Lifetime US3591296A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP42023317A JPS5027805B1 (en:Method) 1967-04-13 1967-04-13

Publications (1)

Publication Number Publication Date
US3591296A true US3591296A (en) 1971-07-06

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ID=12107192

Family Applications (1)

Application Number Title Priority Date Filing Date
US721565A Expired - Lifetime US3591296A (en) 1967-04-13 1968-04-12 Apparatus for measuring slopping and spitting conditions of steel-making furnace

Country Status (6)

Country Link
US (1) US3591296A (en:Method)
JP (1) JPS5027805B1 (en:Method)
BE (1) BE713745A (en:Method)
DE (1) DE1758170C3 (en:Method)
FR (1) FR1575712A (en:Method)
GB (1) GB1219645A (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749171A (en) * 1984-09-06 1988-06-07 Nippon Steel Corporation Method and apparatus for measuring slag-foam conditions within a converter
US5603746A (en) * 1995-10-31 1997-02-18 Bethlehem Steel Corporation Method and apparatus to determine and control the carbon content of steel in a BOF vessel
US6175676B1 (en) 1999-02-23 2001-01-16 Bethlehem Steel Corporation Fiber optic sensor and method of use thereof to determine carbon content of molten steel contained in a basic oxygen furnace
WO2011151143A3 (de) * 2010-06-02 2012-04-19 Siemens Vai Metals Technologies Gmbh Verfahren und vorrichtung zum bestimmen des zeitpunktes der zündung beim aufblasverfahren in einem stahlkonverter
RU2538445C2 (ru) * 2013-01-09 2015-01-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Калининградский государственный технический университет" Устройство для контроля и измерения характеристик процесса шлакообразования в конвертере
CN110069899A (zh) * 2019-06-05 2019-07-30 厦门邑通软件科技有限公司 一种提升转炉出钢率的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60143B2 (ja) * 1976-11-17 1985-01-05 住友金属工業株式会社 溶鋼流出自動制御装置及びその信号判別装置
JPS586567A (ja) * 1981-07-03 1983-01-14 Hitachi Ltd ステレオ装置
JP5418384B2 (ja) * 2010-04-15 2014-02-19 新日鐵住金株式会社 転炉の吹錬制御方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521890A (en) * 1942-11-30 1950-09-12 Gen Motors Corp Pulse averaging circuit
US3468607A (en) * 1966-12-06 1969-09-23 Hawaiian Sugar Planters Assoc Apparatus for the continuous analysis of a liquid stream containing dissolved solids of which a portion are optically active in solution

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521890A (en) * 1942-11-30 1950-09-12 Gen Motors Corp Pulse averaging circuit
US3468607A (en) * 1966-12-06 1969-09-23 Hawaiian Sugar Planters Assoc Apparatus for the continuous analysis of a liquid stream containing dissolved solids of which a portion are optically active in solution

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749171A (en) * 1984-09-06 1988-06-07 Nippon Steel Corporation Method and apparatus for measuring slag-foam conditions within a converter
US5603746A (en) * 1995-10-31 1997-02-18 Bethlehem Steel Corporation Method and apparatus to determine and control the carbon content of steel in a BOF vessel
USRE37922E1 (en) * 1995-10-31 2002-12-10 Bethlehem Steel Corporation Method and apparatus to determine and control the carbon content of steel in a BOF vessel
US6175676B1 (en) 1999-02-23 2001-01-16 Bethlehem Steel Corporation Fiber optic sensor and method of use thereof to determine carbon content of molten steel contained in a basic oxygen furnace
WO2011151143A3 (de) * 2010-06-02 2012-04-19 Siemens Vai Metals Technologies Gmbh Verfahren und vorrichtung zum bestimmen des zeitpunktes der zündung beim aufblasverfahren in einem stahlkonverter
CN102906281A (zh) * 2010-06-02 2013-01-30 西门子Vai金属科技有限责任公司 用于在顶吹方法情况下确定点火时刻的方法
CN102906281B (zh) * 2010-06-02 2014-06-04 西门子Vai金属科技有限责任公司 用于在顶吹方法情况下确定点火时刻的方法
RU2564178C2 (ru) * 2010-06-02 2015-09-27 Сименс Фаи Металз Текнолоджиз Гмбх Способ определения момента зажигания при продувке сверху
RU2538445C2 (ru) * 2013-01-09 2015-01-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Калининградский государственный технический университет" Устройство для контроля и измерения характеристик процесса шлакообразования в конвертере
CN110069899A (zh) * 2019-06-05 2019-07-30 厦门邑通软件科技有限公司 一种提升转炉出钢率的方法
CN110069899B (zh) * 2019-06-05 2023-03-24 厦门邑通智能科技集团有限公司 一种提升转炉出钢率的方法

Also Published As

Publication number Publication date
JPS5027805B1 (en:Method) 1975-09-10
GB1219645A (en) 1971-01-20
DE1758170C3 (de) 1974-05-30
DE1758170A1 (de) 1971-01-14
FR1575712A (en:Method) 1969-07-25
BE713745A (en:Method) 1968-09-16
DE1758170B2 (de) 1973-10-25

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