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1. (CA2235499) METHOD AND APPARATUS TO DETERMINE AND CONTROL THE CARBON CONTENT OF STEEL IN A BOF VESSEL

Office : Canada
Application Number: 2235499 Application Date: 06.09.1996
Publication Number: 2235499 Publication Date: 09.05.1997
Grant Number: Grant Date: 22.10.2002
Publication Kind : C
Prior PCT appl.: Application Number:US1996014334 ; Publication Number: Click to see the data
IPC:
C21C 5/30
C21C 5/46
G01N 21/71
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5
Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel
28
Manufacture of steel in the converter
30
Regulating or controlling the blowing
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5
Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel
28
Manufacture of steel in the converter
42
Constructional features of converters
46
Details or accessories
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
62
Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71
thermally excited
CPC:
C21C 5/4673
C21C 5/30
Y02P 10/122
Applicants: BETHLEHEM STEEL CORPORATION
Inventors: ALOK, SHARAN
Priority Data: 08/550,590 31.10.1995 US
Title: (EN) METHOD AND APPARATUS TO DETERMINE AND CONTROL THE CARBON CONTENT OF STEEL IN A BOF VESSEL
(FR) PROCEDE ET DISPOSITIF DE DETERMINATION ET DE MODULATION DE LA TENEUR EN CARBONE D'UN ACIER DANS UN CONVERTISSEUR A SOUFFLAGE D'OXYGENE AU-DESSUS DU BAIN
Abstract: front page image
(EN) Apparatus for determining in-blow % carbon content and/or the First Turn Down Carbon of a BOF heat includes a light sensor housed within a temperature regulated case having a sighting window including air wipe means to shield the light sensor from steelmaking dust and fume. The apparatus also includes a means to generate a signal that corresponds to the amount of oxygen blown into the BOF during a heat, and a programmable logic controller. The logic controller is programmed to continuously process oxygen blown signals from the signal generating means, and light intensity signals received from the light sensor. The program calculates continuous in-blow % carbon content of the heat based upon the difference in light intensity from a point of maximum light intensity emitted from the BOF vessel in relation to the amount of oxygen blown into the BOF vessel durng the same period of time.


Also published as:
MXPA/a/1998/002959EP0859866EP1046720CN1196757KR1019990063751AU1996069683
WO/1997/016571