GB1342927A - Method of operating blast furnace and apparatus therefor - Google Patents

Method of operating blast furnace and apparatus therefor

Info

Publication number
GB1342927A
GB1342927A GB1522271*[A GB1522271A GB1342927A GB 1342927 A GB1342927 A GB 1342927A GB 1522271 A GB1522271 A GB 1522271A GB 1342927 A GB1342927 A GB 1342927A
Authority
GB
United Kingdom
Prior art keywords
levels
sound
furnace
mantle
level
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1522271*[A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of GB1342927A publication Critical patent/GB1342927A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/006—Automatically controlling the process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02836—Flow rate, liquid level

Abstract

1342927 Sound measurement SUMITOMO METAL INDUSTRIES Ltd 17 May 1971 [20 May 1970] 15222/71 Heading H4D Operating conditions in a blast furnace are judged by detecting the magnitude and varying distribution of solid-borne sound levels at selected points on the mantle of the furnace by means of sound detectors at those points to determine variation of the thickness of deposits on the wall and the occurrence and position of any movement of the burden. Sound detectors 1 of the Fig. 5 embodiment are positioned at one or more levels of the mantle, preferably at 90 degree intervals around the outside of the mantle at each level, the levels being about “ to ¥ of the way up the furnace shaft. The detector outputs are amplified at 2, sampled in turn by switch 3, amplified at 4, and passed through a 5À6-11À2 kHz bandpass filter 5, then the resulting signals are rectified and logarithmically compressed in a servo system comprising A.C. amplifier 6, rectifier 7, D.C. amplifier 8, and potentiometers 9-1, 9-2, 9-3 &c. driven by servomotors M. The compressed signal from 9-2 is integrated at 20 and recorded at 13. Signals representing reference sound levels, obtained from unit 17, are applied to potentiometers 9-3 and the respective differences between the compressed measured sound levels and these reference levels are fed via integrators 10 to summing unit 11 and also to respective indicators 18. The summation signal is shifted through a store 12 to effectively lengthen the integration time, then compared with a reference level at 15. Alarm 16 is actuated if the reference level is exceeded. The sound level measurements may be used to predict instability of furnace operation, such as slip or "hanging" of the burden, and to provide a control signal for avoiding such instability.
GB1522271*[A 1970-05-20 1971-05-17 Method of operating blast furnace and apparatus therefor Expired GB1342927A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45043510A JPS5025415B1 (en) 1970-05-20 1970-05-20

Publications (1)

Publication Number Publication Date
GB1342927A true GB1342927A (en) 1974-01-10

Family

ID=12665717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1522271*[A Expired GB1342927A (en) 1970-05-20 1971-05-17 Method of operating blast furnace and apparatus therefor

Country Status (7)

Country Link
US (1) US3702694A (en)
JP (1) JPS5025415B1 (en)
CA (1) CA933272A (en)
DE (1) DE2124969C3 (en)
FR (1) FR2090168B1 (en)
GB (1) GB1342927A (en)
NL (1) NL158849B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150692A (en) * 1983-11-30 1985-07-03 Squibb & Sons Inc Apparatus and method for coating tablets
GB2211938A (en) * 1987-11-05 1989-07-12 Atomic Energy Authority Uk Acoustic monitoring of plant operation

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772504A (en) * 1971-12-23 1973-11-13 Steel Corp Apparatus for operating a blast furnace
JPS5691680U (en) * 1979-12-17 1981-07-21
JPS6089282A (en) * 1983-10-21 1985-05-20 Hitachi Ltd Symbol reader
JPS60184189U (en) * 1984-05-14 1985-12-06 ニツタン株式会社 Fire extinguishing control device
JPS63178686A (en) * 1987-01-19 1988-07-22 Ace Denken:Kk Device for detecting illegal conduct at play spot
JPS63211887A (en) * 1987-02-27 1988-09-02 Taihei Kogyo Kk Building supervising system
US4993264A (en) * 1989-03-02 1991-02-19 Exxon Research And Engineering Company Passive acoustics process to monitor fluidized bed level
DE102009034353A1 (en) * 2008-12-15 2010-06-24 Siemens Aktiengesellschaft furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150692A (en) * 1983-11-30 1985-07-03 Squibb & Sons Inc Apparatus and method for coating tablets
GB2211938A (en) * 1987-11-05 1989-07-12 Atomic Energy Authority Uk Acoustic monitoring of plant operation

Also Published As

Publication number Publication date
DE2124969B2 (en) 1973-05-03
FR2090168B1 (en) 1974-03-08
US3702694A (en) 1972-11-14
NL158849B (en) 1978-12-15
CA933272A (en) 1973-09-04
DE2124969C3 (en) 1973-11-22
NL7106901A (en) 1971-11-23
DE2124969A1 (en) 1971-12-02
JPS5025415B1 (en) 1975-08-23
FR2090168A1 (en) 1972-01-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee