Measuring device and method for measuring the foaming height of oxide slag

Abstract

A measuring device for measuring the foaming height of slag produced by molten steel in an electric arc furnace, comprising a lifting assembly, a measuring assembly, and a controller. The lifting assembly includes a base and a lifting rod disposed on the base. The measuring assembly includes a temperature sensor and a height sensor disposed on the lifting rod. The controller is connected to the temperature sensor, the height sensor, and the lifting assembly. The controller lowers the lifting rod from an initial position to a first sensing position where the temperature sensor contacts the molten steel, and obtains a first measuring height via the height sensor. The controller then lowers the lifting rod from the initial position to a second sensing position where the temperature sensor contacts the slag, and obtains a second measuring height via the height sensor. The controller obtains the foaming height of the slag based on the difference between the first and second measuring heights.

Claims

1. A measuring device for measuring the foaming height of oxidized slag in an electric arc furnace, the measuring device comprising: a lifting assembly including a base and a lifting rod, the lifting rod being movably disposed on the base; a measuring assembly including a temperature sensor and a height sensor, the temperature sensor being disposed on the lifting rod and the height sensor corresponding to the lifting rod; and a controller electrically connected to the temperature sensor, the height sensor and the lifting rod, the controller being configured to control the lifting rod to descend from an initial position to a first sensing position contacted by the temperature sensor, and to obtain a first measuring height through the height sensor; the controller being configured to control the lifting rod to descend from the initial position to a second sensing position contacted by the temperature sensor, and to obtain a second measuring height through the height sensor; the controller being configured to obtain a foaming height based on the difference between the first measuring height and the second measuring height.

2. The measuring device as claimed in claim 1, wherein the measuring component further includes a limit switch corresponding to the lifting rod and used to set the initial position.

3. The measuring device as claimed in claim 1, wherein the lifting assembly further includes a drive member, the controller being electrically connected to the drive member to cause the drive member to drive the lifting rod to move up and down relative to the base.

4. The measuring device as claimed in claim 3, wherein the lifting assembly further includes a screw disposed on the base, the lifting rod and the driving member are disposed on the screw, and the driving member drives the screw to rotate so that the lifting rod moves up and down relative to the base.

5. The measuring device as claimed in claim 3, wherein the lifting assembly further includes a frequency converter electrically connected to the controller and the drive unit, and the controller is used to control the speed and direction of the drive unit through the frequency converter.

6. The measuring device as claimed in claim 1 further includes a temperature display electrically connected to the controller and the temperature sensor, and used to display the temperature sensed by the temperature sensor.

7. The measuring device as claimed in claim 1, wherein the measuring component further includes a support rod disposed at one end of the lifting rod, and the temperature sensor is fixed to the support rod.

8. The measuring device as claimed in claim 1, wherein the temperature sensor is a thermocouple wire.

9. The measuring device as claimed in claim 1, wherein the height sensor is an optical ruler.

10. A method for measuring the foaming height of oxidized slag, comprising the following steps after a controller reads a plurality of instructions: setting an initial position for a lifting rod; causing the lifting rod to descend from the initial position to a first sensing position contacted by a temperature sensor, and causing a height sensor to acquire a first measured height; causing the lifting rod to descend from the initial position to a second sensing position contacted by the temperature sensor, and causing the height sensor to acquire a second measured height; and obtaining a foaming height based on the difference between the first measured height and the second measured height.

11. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the step of having the height sensor obtain the first measured height includes: determining whether the temperature change measured by the temperature sensor exceeds a preset gradient; if so, stopping the lifting rod from descending and obtaining the height of the lifting rod at the first sensing position relative to the initial position through the height sensor; and raising the lifting rod from the first sensing position to the initial position.

12. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the step of having the height sensor obtain the second measured height includes: determining whether the temperature change measured by the temperature sensor exceeds a preset gradient; if so, stopping the lifting rod from descending, and obtaining the height of the lifting rod at the second sensing position relative to the initial position through the height sensor; and raising the lifting rod from the second sensing position to the initial position.

13. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the initial position is set by a limit switch.

14. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the lifting rod is electrically connected to a drive member, and the drive member is used to drive the lifting rod to move up and down.

15. The method for measuring the foaming height of oxidized slag as described in claim 14, wherein the drive unit drives a screw to rotate, thereby causing the lifting rod to move up and down.

16. The method for measuring the foaming height of oxidized slag as described in claim 14, wherein the drive is electrically connected to a frequency converter, and the frequency converter is used to adjust the rotational speed and direction of the drive.

17. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the controller is electrically connected to a temperature display and the temperature display is used to display the temperature sensed by the temperature sensor.

18. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the temperature sensor is fixed to a support rod, and the support rod is disposed at one end of the lifting rod.

19. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the temperature sensor is a thermocouple wire.

20. The method for measuring the foaming height of oxidized slag as described in claim 10, wherein the height sensor is an optical ruler.

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