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Online intelligent monitoring method and system for slag-iron ratio of blast furnace
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An intelligent monitoring, slag-iron technology, applied in image data processing, instruments, inspection devices, etc., can solve the problem of inability to accurately monitor the blast furnace slag-iron ratio online
Pending Publication Date: 2021-05-28
CENT SOUTH UNIV +1
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[0006] The online intelligent monitoring method and system for blast furnace slag-iron ratio provided by the present invention solves the technical problem that the prior art cannot accurately monitor blast furnace iron-slag ratio on-line
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Embodiment 1
[0062] refer to figure 1 , the blast furnace slag-iron ratio online intelligent monitoring method provided by Embodiment 1 of the present invention includes:
[0063] Step S101, determine the corresponding relationship between the world coordinate system and the pixel coordinate system of the slag iron flow out of the blast furnace taphole through camera calibration;
[0064] Step S102, performing image processing on the slag-iron flow image of the blast furnace taphole to obtain the diameter of the slag-iron stream at the taphole;
[0065] Step S103, obtaining the flow rate of slag and iron at the tap hole according to the distribution characteristics of the longitudinal flow velocity of the fluid;
[0066] Step S104, calculating the real-time change rate of slag mass according to the real-time weight gain rate of the torpedo tank car, so as to obtain the real-time slag-iron ratio of blast furnace tapping.
[0067] The online intelligent monitoring method of the blast furna...
Embodiment 2
[0069] refer to figure 2 , the blast furnace slag-iron ratio online intelligent monitoring method provided by Embodiment 2 of the present invention includes:
[0070] Step S201, determine the corresponding relationship between the world coordinate system and the pixel coordinate system of the slag iron flow out of the blast furnace taphole through camera calibration.
[0071] In this embodiment, the correspondence between the world coordinate system and the pixel coordinate system of the slag and iron flow flowing out of the blast furnace taphole through camera calibration includes:
[0072] Calculate the homography matrix according to the relationship between the pixel coordinate system and the world coordinate system;
[0073] Solve the internal parameters of the camera and the external parameters of the camera according to the homography matrix;
[0074] According to the camera distortion model in the image coordinate system and the camera distortion model in the pixel c...
Embodiment 3
[0164] The specific embodiment of the present invention will be further described below in conjunction with specific examples. The present invention is applied to a 2650m 3 On the blast furnace, it is an intelligent method that can monitor the slag-iron ratio on-line in real time during the blast furnace tapping process. The specific implementation steps for calculating the blast furnace iron-slag-iron ratio are as follows:
[0165] Firstly, through calculation of homography matrix, solution of camera internal and external parameters, maximum likelihood estimation and distortion parameter solution, the mathematical conversion relationship between the slag-iron flow object in the image and the real world is found, and the purpose of measuring the actual size data from the image is realized;
[0166] In the process of blast furnace iron tapping, a series of preprocessing operations such as grayscale, image denoising and image enhancement are collected to collect images of slag an...
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Abstract
The invention discloses a online intelligent monitoring method and system for the slag-iron ratio of a blast furnace, and the method comprises the steps: determining a corresponding relation between a world coordinate system and a pixel coordinate system of a slag-iron flow flowing out of a blast furnace tap hole through camera calibration, carrying out the image processing of a slag-iron flow image of the blast furnace tap hole, obtaining the diameter of the slag-iron flow at the tap hole, obtaining the slag-iron flow of a tap hole according to the longitudinal flow velocity distribution characteristics of fluid, calculating the real-time change rate of slag mass through the real-time weight gain rate of a torpedo tank car, and obtaining the real-time slag-iron ratio of blast furnace tapping. The technical problem that the slag-iron ratio of blast furnace cannot be accurately monitored online in the prior art is solved. Not only can the diameter of the slag-iron stream at the blast-furnace tap hole be monitored online in real time according to the real-time slag-iron stream image at the blast-furnace tap hole, but also the real-time slag-iron ratio of the blast-furnace tap hole can be accurately calculated by performing image processing on the slag-iron stream image at the blast-furnace tap hole and combining the characteristics of longitudinal flow velocity distribution of fluid. Therefore, a complete intelligent method for real-time calculation of the slag-iron ratio in the blast furnace tapping process is formed.
Description
Technical field [0001] The invention mainly relates to the technical field of online intelligent monitoring of blast furnace slag-to-iron ratio, and specifically refers to an online intelligent monitoring method and system for blast furnace slag-to-iron ratio. Background technique [0002] The blast furnace is a vertical shaft-type counter-flow reactor. The column-shaped furnace materials are piled up in the furnace. Under the action of the high-temperature reducing air flow counter-currently, they are continuously heated, decomposed, reduced, softened, melted, dripped, and finally formed. The slag iron melts and separates. The blast furnace slag making process is a process in which the charge does not enter the pig iron and other components of the gas, and is dissolved, combined and melted into liquid slag and separated from the pig iron. Therefore, starting from the interaction of the solid mineral components in the ore, to softening and bonding, to the dissolution of the...
Claims
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