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Control method of blast furnace material flow valve

A control method and material flow valve technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems that cannot fully meet the production environment, long self-adaptive adjustment time, complex and changeable conditions in the furnace, etc., to achieve fast calculation speed, The effect of stable operation and reduced investment

Active Publication Date: 2018-06-15
DALIAN HUAYELIAN AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing automatic setting method only considers the weight factor, but the conditions in the furnace are complex and changeable, and the self-adaptive adjustment takes a long time, which cannot fully meet the requirements of the production environment

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  • Control method of blast furnace material flow valve
  • Control method of blast furnace material flow valve
  • Control method of blast furnace material flow valve

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Embodiment Construction

[0025] The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] A method for controlling a material flow valve of a blast furnace. The method introduces the pressure P1 at the top of the blast furnace, the pressure P2 inside a weighing tank and the temperature T at the top of the blast furnace into the control of the opening of the material flow valve of the material distribution system, and can precisely control the material flow velocity.

[0027] Described method comprises the following steps:

[0028] Step 1. Sensors are respectively installed in the blast furnace 1 and the weighing tank 3 on the upper part of the blast furnace 1 to detect the weight W of the material in the weighing tank 2, the top pressure P1 in the blast furnace 1, the pressure P2 in the weighing tank 2 and the pressure of the blast furnace 1. Top temperature T.

[0029] Such as figure 1 As shown, 1 is the blas...

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Abstract

The invention provides a control method of a blast furnace material flow valve. Sensors are arranged separately in a furnace and a weighing tank on the upper part of the blast furnace; firstly, a plurality of signals of material weight W, blast furnace internal top pressure P1, weighing tank internal pressure P2 and blast furnace top temperature T are acquired and are transmitted to a PLC controlsystem to be subjected to processing and calculation; a material flow valve speed V relation equation is obtained according to an experience data curve fitting method; automatic control of the material flow valve is performed officially; the material weight W, the blast furnace internal top pressure P1, the weighing tank internal pressure P2 and the blast furnace top temperature T which are acquired are transmitted to the PLC control system to be processed and calculated; a control preset value of the material flow speed V is calculated according to the material flow valve speed equation; theblast furnace internal top pressure, the weighing tank internal pressure and the blast furnace top temperature values are introduced into material flow valve opening control of a material distributionsystem; and the material flow speed equation is obtained according to the sample parameter model curve fitting method, so that material flow speed can be precisely controlled.

Description

technical field [0001] The invention relates to the technical field of material flow valve control for blast furnace multi-ring distribution, in particular to a blast furnace material flow valve control method. Background technique [0002] At present, there are two main methods of material distribution for bellless blast furnaces: one is time multi-ring distribution, and the other is weight multi-ring distribution. The purpose is to spread the raw materials evenly in the furnace and have a stabilizing effect on the shape of the furnace. The material flow valve is a valve used in the blast furnace multi-ring distribution. The iron ore enters the blast furnace throat through the material flow valve and the chute in the weighing tank. Among them, the opening of the material flow valve controls the material flow velocity, further controls the distribution of the material surface in the furnace, and then determines the production efficiency of the blast furnace. At this stage, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/006C21B5/008
Inventor 张鎏高大鹏
Owner DALIAN HUAYELIAN AUTOMATION