SE501054C2 - Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt - Google Patents

Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt

Info

Publication number
SE501054C2
SE501054C2 SE9300969A SE9300969A SE501054C2 SE 501054 C2 SE501054 C2 SE 501054C2 SE 9300969 A SE9300969 A SE 9300969A SE 9300969 A SE9300969 A SE 9300969A SE 501054 C2 SE501054 C2 SE 501054C2
Authority
SE
Sweden
Prior art keywords
slag
lance
smelt
density
substances
Prior art date
Application number
SE9300969A
Other languages
Swedish (sv)
Other versions
SE9300969L (en
SE9300969D0 (en
Inventor
Haakan Wahlberg
Lars Oskarsson
Original Assignee
Ssab Tunnplaat Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ssab Tunnplaat Ab filed Critical Ssab Tunnplaat Ab
Priority to SE9300969A priority Critical patent/SE501054C2/en
Publication of SE9300969D0 publication Critical patent/SE9300969D0/en
Priority to PCT/SE1994/000872 priority patent/WO1996009414A1/en
Publication of SE9300969L publication Critical patent/SE9300969L/en
Publication of SE501054C2 publication Critical patent/SE501054C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • 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
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
    • G01F23/165—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid of bubbler type
    • G01F23/168—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid of bubbler type with electric indicating or recording
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/12—Dippers; Dredgers
    • G01N1/125—Dippers; Dredgers adapted for sampling molten metals

Abstract

In chill metallurgy, the slag thickness and density are measured with a lance (14) which is pushed through the slag (13) down into the smelt (12). To the lance is fed a constant flow of argon gas and the counter pressure in the lance and the lance position is logged when it is pushed downwards. From this value is obtained the slag thickness and density. With knowledge of the chill area, the amt. of slag can then be calculated, which is an important parameter which is used for optimising the process.

Description

'5o1 054 2 man en kurva av i princip det utseende som visas i Figur 2. Diagrammet är lagt så att lansspetsens läge i skånken 11 och på lodräta axeln i diagrammet överens- stämmer. Mottrycket p i lansen är avsatt på vågräta axeln. Man ser att mottrycket är konstant till dess att lansspetsen når slaggytan. Sedan ökar mottrycket ungefär linjärt med ökat slaggdjup. När lansspetsen när stålsmältan kommer mottrycket att öka snabbare, men fortfarande linjärt, på grund av smältans högre densitet. '5o1 054 2 a curve of basically the appearance shown in Figure 2. The diagram is laid out so that the position of the lance tip in the bar 11 and on the vertical axis in the diagram corresponds. The back pressure p in the lance is deposited on the horizontal axis. You can see that the back pressure is constant until the lance tip reaches the slag surface. Then the back pressure increases approximately linearly with increased slag depth. When the lance tip reaches the steel melt, the back pressure will increase faster, but still linearly, due to the higher density of the melt.

Utvärderingen görs lämpligen on-line i en dator och med ett program där man ut- nyttjar ett statistiskt synsätt får man en noggrann beräkning av lägena För slag- gens övre och undre yta 22, 23 och dess densitet. Pilama 24, 25 indikerar bryt- punktema som i sin tur indikerar ytornas 22, 23 lägen.The evaluation is suitably done online on a computer and with a program where you use a statistical approach, you get an accurate calculation of the positions for the slag's upper and lower surface 22, 23 and its density. Arrows 24, 25 indicate the breakpoints which in turn indicate the positions of the surfaces 22, 23.

Claims (2)

3 501 054 Patentkrav3,501,054 Patent claims 1. Sätt att anpassa mängden desoxidationsämnen och/eller legeringsämnen som tillsätts till en smälta i ett metallurgiskt kärl, k ä n n e t e c k n a t av att man tillför gas med antingen ett konstant flöde eller ett konstant tryck till en lans (14) och för ner lansen genom slaggen (13) och ner i badet (12) och vid konstant tryck mäter variationen i flöde eller vid konstant flöde mäter variationen i mottryck i lansen som funktion av lansens axiella läge och ur de uppmätta variationema beräknar slaggens (13) densitet och tjocklek, varefter man beräknar slaggvikten med kännedom om kärlets (11) area, slaggens (13) tjocklek och slaggens (13) densitet och, när man tillsätter desoxidatíonsäm- nen och/eller legeringsänmen, kompenserar för den mängd som slaggen, i bero- ende av slaggvikten, beräknas uppta.A method of adjusting the amount of deoxidizing substances and / or alloying substances added to a melt in a metallurgical vessel, characterized in that gas is supplied with either a constant fate or a constant pressure to a lance (14) and the lance is lowered through the slag. (13) and down in the bath (12) and at constant pressure the variation in fl fate or at constant fl fate measures the variation in back pressure in the lance as a function of the axial position of the lance and from the measured variations the slag (13) is calculated density and thickness, after which calculates the slag weight with knowledge of the area of the vessel (11), the thickness of the slag (13) and the density (13) of the slag and, when adding the deoxidizing agent and / or the alloying agent, compensates for the amount which the slag, depending on the slag weight, is calculated occupy. 2. Sätt enligt patentkrav 1, k ä n n e t e c k n at av att man före egentliga mätningen först mäter in slaggni- vån (22), företrädesvis med radar eller laser (21), och snabbmatar lansen (14) till ett läge nära slaggnivån.2. A method according to claim 1, characterized in that before the actual measurement, the slag level (22) is first measured in, preferably with radar or laser (21), and the lance (14) is quickly fed to a position close to the slag level.
SE9300969A 1993-03-24 1993-03-24 Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt SE501054C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9300969A SE501054C2 (en) 1993-03-24 1993-03-24 Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt
PCT/SE1994/000872 WO1996009414A1 (en) 1993-03-24 1994-09-21 A method of adapting the amounts of additives such as deoxidizers and/or alloying elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9300969A SE501054C2 (en) 1993-03-24 1993-03-24 Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt
PCT/SE1994/000872 WO1996009414A1 (en) 1993-03-24 1994-09-21 A method of adapting the amounts of additives such as deoxidizers and/or alloying elements

Publications (3)

Publication Number Publication Date
SE9300969D0 SE9300969D0 (en) 1993-03-24
SE9300969L SE9300969L (en) 1994-09-25
SE501054C2 true SE501054C2 (en) 1994-10-31

Family

ID=26661690

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9300969A SE501054C2 (en) 1993-03-24 1993-03-24 Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt

Country Status (2)

Country Link
SE (1) SE501054C2 (en)
WO (1) WO1996009414A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996009414A1 (en) * 1993-03-24 1996-03-28 SSAB Tunnplåt AB A method of adapting the amounts of additives such as deoxidizers and/or alloying elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113932879A (en) * 2021-09-26 2022-01-14 中国恩菲工程技术有限公司 Automatic detection device for high-temperature melt

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501054C2 (en) * 1993-03-24 1994-10-31 Ssab Tunnplaat Ab Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996009414A1 (en) * 1993-03-24 1996-03-28 SSAB Tunnplåt AB A method of adapting the amounts of additives such as deoxidizers and/or alloying elements

Also Published As

Publication number Publication date
SE9300969L (en) 1994-09-25
WO1996009414A1 (en) 1996-03-28
SE9300969D0 (en) 1993-03-24

Similar Documents

Publication Publication Date Title
Frenk et al. High speed laser cladding: solidification conditions and microstructure of a cobalt-based alloy
Irons et al. Bubble formation at nozzles in pig iron
Thomas Continuous casting of steel
Kimura Fundamental research of lancing mechanism in Mitsubishi continuous smelting furnace
SE501054C2 (en) Adjusting amt. of deoxidation substances and/or alloy bodies added to smelt - involves measurement of slag thickness and density with lance pushed through slag into smelt
JP3520535B2 (en) Blast furnace tap hole depth measurement method
US3719469A (en) Control for basic oxygen steelmaking furnace
Little et al. Factors affecting the reoxydation of molten steel during continuous casting
Kim et al. Studies of interfacial heat transfer resistances and characterization of strip microstructures for Al-Mg alloys cast on a single belt casting simulator
JPH01215450A (en) Slag flowout detecting method
KR200338210Y1 (en) Combinations probe for high accuracy and quick response
KR960000298Y1 (en) Tundish dam
JPH05180580A (en) Measuring method for thickness of slag
JP2801918B2 (en) Continuous casting method
JPS6293051A (en) Pouring method for molten steel in continuous casting
Visser et al. Supplementary tools to measure and understand the flow in the continuous casting mould
RU2113506C1 (en) Method of lance installation in position of melt blowing in ladle
Koria et al. Physical Modelling of Bubble Plume Rising in Steel Melt
JPS61242746A (en) Detection of slag in outflow molten metal
Heinke et al. Computer control of the VOD process
Morioka et al. Process for Detecting Outflow of Slag
JPS5266466A (en) Detectin of molten metal levels within molten steel vessel such as mol ds for continous casting
JPS62168652A (en) Molten metal surface level control method in continuous casting machine
Kadukov et al. Ladle Homogenizing of Steel During Argon Purging
Hinterkoerner et al. Slab-Quality Prediction with In-Depth Metallurgical Modeling