Method and device for determining the consumption of electrode material during the operation of an electric furnace

Patent metadata

Field	Value
Publication number	US-9841366-B2
Application number	US-201414566890-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Jun 11, 2012
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A method determines the consumption of electrode material during the operation of an electric furnace, particularly an arc furnace for producing steel. The method determines a weight of an electrode column, which is arranged in the electric furnace or is to be introduced into the electric furnace, using a weighing device. A device for determining the consumption of electrode material of an electric furnace, particularly an arc furnace for producing steel, is provided for performing the method. The device contains a weighing device for determining the weight of at least one electrode column which is arranged in the electric furnace or is to be introduced into the electric furnace, wherein the weighing device is integrated in an operating device of a system containing the electric furnace. Vibration conditions of the electrode column during operation of the electric furnace can also be determined with the method and with the device.

First claim

The invention claimed is:

1. A method for determining consumption of electrode material during a production of steel in an electric arc furnace, the method comprises the step of:
determining a weight of at least one electrode column disposed inside the electric arc furnace or to be introduced into the electric arc furnace, without removing the electrode column from the electric arc furnace, by using at least one weighing device carrying out a continuous or quasi-continuous determination of the weight of the electrode column with a temporal resolution of from 1 to 500 Hz without having to modify an operating procedure of the electric furnace and without additional electrode column movements having to be carried out.

2. The method according to claim 1 , which further comprises automatically determining the weight of the at least one electrode column.

3. The method according to claim 1 , which further comprises determining the weight of the at least one electrode column at at least two different points in time.

4. The method according to claim 3 , which further comprises determining the weight of the at least one electrode column before and after a melt operation interval of the electric furnace.

5. The method according to claim 1 , which further comprises:
integrating the weighing device in an operating device of a system containing the electric furnace, and integrating the weighing device in a transport device with which the electrode column disposed inside the electric furnace and held in the electric furnace by a holding device, is received and transported in the electric furnace and/or transported out of the electric furnace, and/or with which the electrode column disposed outside of the electric furnace is transported into the electric furnace, and/or the weighing device is integrated in the holding device by which the electrode column is held in position during the operation of the electric furnace, in an adjusting device of the holding device, with which the holding device is adjustable, including being height-adjustable.

6. The method according to claim 1 , which further comprises determining the weight of the at least one electrode column using at least one strain gauge, at least one force transducer and/or at least one pressure measuring element disposed in a hydraulic system for adjusting a holding device for the electrode column.

7. The method according to claim 1 , which further comprises providing an arc furnace as the electric furnace.

8. The method according to claim 6 , which further comprises selecting the strain gauge from the group consisting of a metallic strain gauge and an optical strain gauge.

9. A device for determining consumption of electrode material during a production of steel in an electric arc furnace, the device comprising:
at least one weighing device for a continuous or quasi-continuous determination of a weight of at least one electrode column disposed in the electric arc furnace during a production of steel in the electric arc furnace without having to modify an operating procedure of the electric arc furnace and without additional electrode column movements having to be carried out,
said weighing device being integrated in a transport device for transporting and holding the electrode column.

10. The device according to claim 9 , wherein said weighing device determines the weight of the electrode column automatically.

11. The device according to claim 9 , wherein said transport device is configured to receive the electrode column that is disposed inside the electric furnace and held in the electric furnace by a holding device and to transport the electrode column inside the electric furnace and/or transport the electrode column out of the electric furnace and/or to transport the electrode column disposed outside of the electric furnace into the electric furnace.

12. The device according to claim 9 , wherein said weighing device is integrated in a holding device which is configured to hold the electrode column during a melt operation of the electric furnace.

13. The device according to claim 12 , wherein said weighing device is integrated in a support arm of the holding device.

14. The device according to claim 12 , wherein said weighing device has at least one of a strain gauge, at least one force transducer or at least one pressure measuring element disposed in a hydraulic system for adjusting the holding device for the electrode column.

15. The device according to claim 14 , wherein said strain gauge is selected from the group consisting of a metallic strain gauge and an optical strain gauge.

16. The device according to claim 9 , wherein said weighing device is configured such that said weighting device determines the weight of the at least one electrode column continuously or at least quasi-continuously with a temporal resolution of from 1 to 500 Hz.

17. The device according to claim 9 , wherein the electric furnace is an arc furnace for producing steel.

Assignees

• Sgl Carbon Se

Inventors

• Werner Franz-Xaver
• Fischer Stefan
• Christ Martin

Classifications

• G01G19/14

  for weighing suspended loads (G01G3/00 takes precedence; incorporation of weighing devices in cranes B66C1/40, B66C13/16) · CPC title

• B66C13/16 Primary

  Applications of indicating, registering, or weighing devices (in crane hooks B66C1/40; in safety gear B66C15/00; weighing-apparatus G01G; remote indicating in general G08) · CPC title

• F27D19/00

  Arrangements of controlling devices · CPC title

• F27B3/00

  Hearth-type furnaces, e.g. of reverberatory type (F27B9/00, F27B11/00, F27B13/00, F27B14/00, F27B15/00, F27B21/00 take precedence); Electric arc furnaces {; Tank furnaces} · CPC title

• G01G3/14

  measuring variations of electrical resistance (G01G3/13 takes precedence) · CPC title