Method and device for measuring levels of cast-iron and slag in a blast furnace

A blast furnace, horizontal technology, applied in the level and slag level, strain gauge sensor field, can solve the problem of inaccurate measurement, not allowing measurement, etc.

Inactive Publication Date: 2015-08-05
CENT DE RECH METALLURGIQUES CENT VOOR RES IN DE METALLURGIE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement is generally imprecise and does not allow measuring any possible slag levels
This method cannot be applied to the thick walls of the blast furnace, because the strain will also affect all instruments

Method used

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  • Method and device for measuring levels of cast-iron and slag in a blast furnace
  • Method and device for measuring levels of cast-iron and slag in a blast furnace
  • Method and device for measuring levels of cast-iron and slag in a blast furnace

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Embodiment Construction

[0056] figure 1 is a schematic view in vertical section of the wall 2 of the hearth 1 of a blast furnace. The wall consists of refractory material 3 and steel shields 4 . According to a preferred embodiment of the device according to the invention, the steel shield of the outer wall is equipped with strain gauge sensors 6 , indicated by circles, arranged alternately with thermal sensors 7 , indicated by triangles. figure 1 A non-limiting example with six strain gauge sensors 6 and five thermal sensors 7 attached to the outer surface of the steel shield 4 is shown. The position of the outflow hole 5 is also shown.

[0057] At high temperatures in the hearth 1, the refractory material 3 may soften and / or be subject to erosion and corrosion. Without a cooling system, they have a limited lifespan. Cooling is achieved by circulating water through plates and pipes enclosed in the walls of the blast furnace. The hearth 1 of the blast furnace can be cooled by flowing water throug...

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PUM

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Abstract

The present invention relates to a method for measuring the liquid-metal surface level (13) and the slag surface level (14) in the crucible (1) of a metallurgical shaft furnace comprising the following steps: measuring, at one or more points on the external wall (2) of the crucible, the following variables: the circumferential strain in said external wall (2) by means of a number of strain-gauge sensors (6) fixed to the armour (4) of the external wall (2) of the crucible; and the temperature of said external wall (2) by means of one or more temperature sensors (7) fixed to the armour (4) of the external wall (2) of the crucible; introducing said variables measured at a number of points on the external wall of the crucible into the general equation governing circumferential strain, the solution of which is analytical, and which contains two unknowns, the liquid metal level and the overall liquid metal / slag level, considering set parameters; and solving said equation and obtaining an analytical solution giving the liquid metal surface level (13) and the slag surface level (14) in the crucible (1).

Description

technical field [0001] The present invention relates to a method for accurately measuring the level of liquid metal in the crucible (crucible) of a metallurgical shaft furnace and the level of dross or slag floating on the surface of the liquid metal, in particular Ground is used to measure cast iron levels and slag levels in blast furnaces (blast furnaces). In particular, the method comprises the use of one or more strain gauge sensors mounted on the outer wall of the blast furnace. [0002] The invention also relates to specific strain gauge sensors used in the method. Background technique [0003] Blast furnaces are known as carbothermal reduction furnaces designed to smelt cast iron from iron ore. To produce cast iron, solid coke and iron ore are charged through the top of the furnace into a section known as the throat. Hot air (1200° C.) blown into the bottom of the furnace causes coke to burn. Carbon from the coke is thus oxidized. Carbon monoxide will reduce iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/22G01F23/14B22D11/18C21B7/24C21C5/46
CPCF27D21/0014G01F23/22C21C2005/5288G01F23/246C21C5/4673G01F23/14F27B1/28F27D21/0028C21B7/24Y02P10/20
Inventor 克劳迪奥·奥赫达 阿罗约弗雷德里克·迪里厄埃里克·埃塞尔
Owner CENT DE RECH METALLURGIQUES CENT VOOR RES IN DE METALLURGIE
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