EP0246517A1
Expired / Lapsed
EP
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A method for controlling an operation of a blast furnace
Assignee: JFE Engineering Corp
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Filing: 1987-05-08
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Granted: —
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Expires: 2007-05-08
Abstract
Abstract a method for operating a blast furnace by inferring the operating conditions in the blast furnace, on the basis of data supplied from sensors (11) set in the blast furnace and also on the basis of the knowledge base formed by experience on the operation of the furnace by a small-scale computer (20) and various processing units (21, 22, 23) provided within the computer. Prior to the inference, the data from the sensors are processed by a large-scale computer (10) and various processing units (12,13,14,15) provided within the large-scale computer. The inference is performed by using certainty factor values, thereby making diagnosis of slip, hanging and channeling.
Inventors
- 👤 Kazumasa Patent & License And Quality Wakimoto
- 👤 Motohiro Patent & License and Quality Shibata
- 👤 Takaharu Patent & License and Quality Ishii
- 👤 Masaaki Patent & License and Quality Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0218; G05B23/0243; C; C21; C21B; C21B5/00; C21B5/006; G05B13/00; G05B13/02; G05B13/0265; G05B13/028; G05B23/0259; G05B23/0286; G05B23/0289; Y; Y10; Y10S; Y10S706/00; Y10S706/902; Y10S706/903; Y10S706/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
A method for controlling an operation of a blast furnace which comprises the steps of: storing first data output from sensor means (11) provided for the blast furnace into a central processing unit (42); processing said first data, thereby preparing second data showing the operating conditions in the blast furnace; and preparing true-and-false data, as the third data, by comparing said second data with standard data, and inferring a furnace operating condition, from the third data and knowledge base formed by accumulated experience ; on the operation of the blast furnace.
Claim 2
Independent Claim
91 words
A method for controlling an operation of a blast furnace which comprises the steps of: storing first data output from sensor means (11) provided for the blast furnace into a central processing unit (42); processing said first data, thereby preparing second data showing the operating conditions in the blast furnace; and preparing true-and-false data, as the third data, by comparing said second data with standard data, and inferring a furnace operating condition, from the third data and knowledge base formed by accumulated experience ; on the operation of the blast furnace.
Claim 3
Dependent Claim
22 words
A method according to claim 1, characterized in that said operating condition includes at least one selected from channeling, slip and hanging.
Claim 4
Dependent Claim
73 words
A method according to claim 1 or 2, characterized in that said sensor means (11) provided for the blase furnace includes at least one selected from the following: a sensor measuring burden-descent speed; a sensor measuring in-furnace pressure; a sensor measuring burden temperature; a sensor measuring in-furnace gas temperature; a sensor measuring composition of in-furnace gas; and a sensor measuring pressure of blast gas blown in through tuyeres set in the blast furnace.
Claim 5
Dependent Claim
73 words
4 . A method according to any of claims 1 to 3, characterized in that said step of processing the first data includes at least one selected from the following processings: calculating a rate of change within a designated time interval; calculating an integral value within a designated time interval; calculating dispersion of values within a designated time interval; and calculating balance between a value measured at present and a value measured before.
Claim 6
Independent Claim
48 words
A method according to any of claims 1 to 4, characterized in that said second data include at least one selected from the following: data representing burden-descent behavior; data representing in-furnace pressure loss; data representing in-furnace temperature; data representing composition of in-furnace gas; and data representing residual slag.
Claim 7
Dependent Claim
37 words
A method according to claim 5, characterized in that said data representing burden descent behavior includes at least one selected from the following: burden-descent speed; dispersion of burden-descent speed; delay of burden-descent; and average of burden-descent speeds.
Claim 8
Dependent Claim
45 words
A-method according to claim 5 or 6, characterized in that said data representing in-furnace pressure loss includes at least one selected from the following: in-furnace pressure loss; average of in-furnace pressure losses; dispersion of in-furnace pressure losses; and average of shaft pressures in stable operation.
Claim 9
Independent Claim
62 words
A method according to any of claims 5 to 7, characterized in that said data representing in-furnace temperature includes at least one selected from the following: rise of shaft temperature; average of shaft temperatures in stable operation; rise of burden temperature, measured by horizontal probes set in a shaft; and average of burden temperatures in stable operation, measured by the horizontal probes.
Claim 10
Independent Claim
42 words
A method according to any of claims 5 to 8, characterized in condition comprises a step of processing the true-and-false data, in consideration of a CF value corresponding to an individual item of the true-and-false data, to prepare a total judgement datum.
Claim 11
Independent Claim
32 words
A method according to any of claims 1 to 14, characterized by further comprising the step of controlling an operating condition of the blast furnace in accordance with results of the inference.
Claim 12
Dependent Claim
35 words
A method according to claim 15, characterized in that said step of controlling an operating condition of the blast furnace comprises reducing blast blown into the blast furnace through tuyeres set in the blast furnace.
References Cited (Backward Citations)
US4248625A
Cited
GB2142206A
Cited
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