Bell-less blast furnace top distribution closed-loop control method based on multipoint radar data

A radar data, closed-loop control technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as real-time feedback adjustment of distribution matrix

Inactive Publication Date: 2011-09-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is impossible to perform real-time feedback adjustment of the distribution matrix according to the current gas flow distribution information using this method for cloth distribution operation.

Method used

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  • Bell-less blast furnace top distribution closed-loop control method based on multipoint radar data
  • Bell-less blast furnace top distribution closed-loop control method based on multipoint radar data
  • Bell-less blast furnace top distribution closed-loop control method based on multipoint radar data

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Embodiment Construction

[0033] The following analysis is based on the Baosteel 2500m installed 6-point radar 3 on the blast furnace.

[0034] 1) Material surface shape fitting

[0035] The ore distribution matrix is ​​known, and the ore material surface curve is estimated. According to the cloth model, the ore reference material surface curve can be calculated It is assumed that the reference material surface curve has p stack tips, and the coordinates of the intersection points of the stack tips, stack valleys and curves with the furnace core and the furnace wall are i=1, 2..., 2p+1; set the 6-point radar measurement data as (x i ,y i ), i=1,2,...,6; use 2p+2=rho polynomial to fit the material surface, that is, to set the material surface curve as

[0036] f(x)=a ρ x ρ +a ρ-1 x ρ-1 +...+a 1 x+a 0

[0037] Then, using the weighted least squares method, the ore fitting material surface curve can be obtained In the same way, the coke fitting material surface curve can be obtained as ...

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Abstract

The invention discloses a bell-less blast furnace top distribution closed-loop control method for calculating furnace charge distribution and ore-coke ratio distribution according to bell-less blast furnace charge surface data measured by multi-point radar and automatically changing a distribution matrix. The method is characterized by comprising the following steps of: accurately estimating a charge level shape by using the multi-point radar data and a distribution model; establishing an ore-coke ratio distribution mathematical model so that the ore-coke ratio distribution can be used for replacing gas flow distribution; establishing an expected ore-coke ratio distribution mathematical model so that expected ore-coke ratio distribution is set according to the furnace condition information; setting an optimal distribution matrix developed on the basis of the radar data so that the ore-coke ratio distribution formed after next distribution reaches the expected distribution; and finally, fulfilling the purposes of closed-loop control and all along reasonable gas flow distribution.

Description

technical field [0001] The closed-loop control method for blast furnace top material distribution of the invention belongs to the field of automatic control of blast furnace ironmaking. Background technique [0002] The ironmaking field accounts for 70% of the total energy consumption of the entire metallurgical industry, and is an important field for energy conservation and emission reduction. A key factor in realizing energy saving and emission reduction in the field of ironmaking is to ensure the reasonable distribution of gas flow in the blast furnace. Furnace roof cloth is an important means to adjust the distribution of gas flow. There are four kinds of material distribution methods for bellless furnace top: single-ring distribution, multi-ring distribution, fan-shaped distribution and fixed-point distribution. Fan-shape cloth and fixed-point cloth belong to the cloth method of manual adjustment under special circumstances. Compared with single-ring cloth, multi-rin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 尹怡欣祝乔陈先中
Owner UNIV OF SCI & TECH BEIJING
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