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Method and device for determining a temperature t of a metal melt without contact

A non-contact technology for molten metal, applied in the field of temperature T devices and electric arc furnaces, can solve the problems of incorrect measurement of molten metal temperature T, inability to easily measure temperature, etc., to reduce production costs, save energy and inert gas, Space Requirements Easy Effects

Inactive Publication Date: 2014-06-04
PRIMETALS TECH GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, it has been found that the burner-lance-unit cannot easily be used for contactless temperature measurement in the standard operation described above
Therefore, during burner mode there are no disturbing influences due to the self-radiation of the flames, which lead to false measurements of the temperature T of the molten metal
During the lance mode, in which oxygen or an oxygen-containing gas is sprayed into the furnace chamber in standard operation, the oxygen burns exothermicly in the furnace chamber, whereby here too, due to the combustion process, there are no disturbing influences which lead to metal melting. Mismeasurement of liquid temperature T

Method used

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  • Method and device for determining a temperature t of a metal melt without contact
  • Method and device for determining a temperature t of a metal melt without contact
  • Method and device for determining a temperature t of a metal melt without contact

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Embodiment Construction

[0043] figure 1 A detail of a metallurgical furnace 1 is shown, in which a molten metal 2 is arranged. The furnace 1 is here formed by an electric arc furnace with a furnace chamber 1a and a furnace wall 1b. Slag 2 a forms on the surface of molten metal 2 . The burner-lance-unit 3 is mounted on the furnace wall 1 b above the molten metal 3 and is aimed at the surface of the molten metal 2 . The burner-lance unit 3 has a channel K through which, in the lance mode, a gas flow is introduced into the furnace chamber 1 a in the direction of the molten metal 2 .

[0044] The burner-lance unit 3 has a plurality of connections, including a gas delivery device 4 for delivering the gas necessary for the operation of the lance, which is preferably injected into the furnace chamber 1 a at supersonic speed. A first gas, here preferably an inert gas in the form of oxygen, and a second gas, here preferably an inert gas in the form of nitrogen, are sprayed at supersonic speed into the fur...

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Abstract

The method involves operating a burner gun unit (3) in a lance mode in which gas stream is guided with supersonic velocity into a furnace chamber (1a). A surface of a metal melt (2) is freely-blown by the gas stream, which is formed over a time period by oxygen-containing gas. Temperature of the metal melt is continuously measured within another time period using a temperature measuring unit (10). Variations of the measured temperature of 1 percentage are occurred after the gas flow is present in a laminar state and after time period of 2 seconds. An independent claim is also included for a device for contactlessly determining temperature of a metal melt in a furnace.

Description

technical field [0001] The invention relates to a method for the contactless detection of the temperature T of a molten metal in a melting furnace comprising at least one burner-lance-unit passing through the furnace wall of the melting furnace above the molten metal into the furnace chamber, the method is carried out with at least one temperature measuring unit downstream of the at least one burner-lance unit. The invention also relates to a device for contactless detection of the temperature T of molten metal in a furnace, wherein the device comprises at least one burner-lance-unit which is led above the molten metal through the furnace wall of the furnace into the chamber middle. The invention also relates to a furnace, in particular an electric arc furnace, having such a device. Background technique [0002] Furnaces for processing and / or containing molten metal are commonly used in the iron and steel industry. Such furnaces can be, for example, electric arc furnaces,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00G01J5/02G01J5/04
CPCG01J5/04G01J5/00G01J5/02G01J5/029G01J5/004G01J5/051
Inventor M.阿贝尔A.米勒D.纳尔达基奥内
Owner PRIMETALS TECH GERMANY