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Method and device for measuring thickness of hearth wall of blast furnace online

A blast furnace and furnace wall technology, which is applied in the field of blast furnace wall thickness measurement, can solve the problems such as the inability to effectively measure the thickness of the hearth furnace wall, the inability to realize continuous monitoring of the thickness of the hearth furnace wall, and the limitation of the thickness of the hearth furnace wall, etc. Achieve the effect of being conducive to safe and stable operation, avoiding monitoring blind spots, and reducing erosion rate

Active Publication Date: 2020-04-14
SHANGHAI UNIV
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Problems solved by technology

The stress wave method cannot realize continuous monitoring of the thickness of the hearth wall. In addition, when calculating the thickness of the hearth wall based on the stress wave information, information such as the Young's modulus of the refractory material at room temperature and working temperature is required. Therefore, in the standard refractory data The measurement error will be increased under the condition that it cannot be used and the use of alternative refractory data
Although the thermocouple temperature measurement method and the stress wave method have been applied, due to their respective limitations in measuring the thickness of the hearth wall, it is impossible to effectively measure the thickness of the hearth wall during its service

Method used

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  • Method and device for measuring thickness of hearth wall of blast furnace online
  • Method and device for measuring thickness of hearth wall of blast furnace online
  • Method and device for measuring thickness of hearth wall of blast furnace online

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Embodiment 1

[0035] In this example, see Figure 1-Figure 4 , a method for online measurement of the thickness of a hearth wall of a blast furnace, comprising the steps of:

[0036] a. Set a series of electromotive force measurement points at the positions of the blast furnace hearth hearth wall where the horizontal plane height position of the center of the tuyere and the center of the tap hole are set, and each electromotive force measurement point is located at a different height level, and The electromotive force measurement points are respectively located on the refractories and the furnace shell at different depths of the furnace wall, so that the electromotive force measurement points on the same layer at the same height are installed symmetrically and evenly along the horizontal circumference of the hearth, and the blast furnace hearth The electromotive force measurement points at the same azimuth position of the wall are distributed at equal intervals on the refractory materials a...

Embodiment 2

[0050] This embodiment is basically the same as Embodiment 1, especially in that:

[0051] In this embodiment, when using the method of online measurement of the wall thickness of the blast furnace hearth, the measured value of the electromotive force signal collected in step a and the reference value of the electromotive force signal collected in step b are compared and analyzed and processed to obtain real-time Measured blast furnace hearth wall thickness information and slag-iron liquid level information. In this embodiment, while measuring the thickness information of the blast furnace hearth wall in real time, it can also measure the slag-iron liquid level information, including the height change information of the slag-iron interface. Due to the difference in the physical properties of the material, the energy of the slag and molten iron in the hearth passes through the ceramic cup, carbon brick, ramming material and furnace shell, and there is a certain difference in th...

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Abstract

The invention discloses a method and device for measuring the thickness of a hearth wall of a blast furnace online. According to the method and device, an electromotive force signal at a measurement point in the hearth wall is taken as a parameter, processing and analysis of electromotive force data at different tuyeres and tapping holes are carried out through a computer, and information relatedto the thickness of a refractory material is obtained. Measurement is based on different stored energy of the liquid slag iron, the energy has a change rule in the process of transmitting the energy from the inside of the hearth to the outside through the furnace wall refractory material, and a measured value represents electromotive force generated in the process of transmitting the energy by therefractory material of the blast furnace hearth and the furnace shell. The device is composed of a computer data visualization system, a data transmission line and an electromotive force measurer, and electromotive force of each measurement point can be directly analyzed and calculated. According to the invention, the change of the hearth wall thickness can be monitored online in real time, and the blast furnace is guided to adjust upper and lower parts and a cooling system in time, so that the stability and long service life of the hearth can be monitored and realized from daily operation.

Description

technical field [0001] The invention relates to a method and a device for measuring the thickness of a blast furnace wall, in particular to a method and a device for measuring the thickness of a hearth wall of a blast furnace, which are applied in the technical field of blast furnace monitoring. Background technique [0002] The blast furnace is the main equipment for ironmaking. Due to its special working environment of black box, high pressure, high temperature, and high gas, the means to obtain some parameters of the blast furnace are very limited, such as the thickness of the refractory material of the hearth. Hearth refractory thickness is an important parameter to reflect the erosion situation, and has become a restrictive link for the longevity of blast furnaces. [0003] At present, there are thermocouple temperature measurement method and stress wave method for measuring the thickness of hearth furnace wall. The thermocouple temperature measurement uses the princip...

Claims

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Application Information

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IPC IPC(8): C21B7/24
CPCC21B7/24
Inventor 于要伟李映葛谣魏涵昝磊李萌
Owner SHANGHAI UNIV
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