IP Library Granted Patent US 7,991,039
Granted Patent B2
US 7,991,039 · App. 10/999,374 · Granted Aug 2, 2011

Electric arc furnace monitoring system and method

Assignee: GrafTech International Holdings Inc.
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Quick Facts
Patent No.
US 7,991,039
App. No.
10/999,374
Granted
Aug 2, 2011
Kind
B2
Abstract

A system and method for monitoring the operating parameters of an electric arc furnace having a primary electrical circuit comprising a primary current transformer. The method includes monitoring the furnace's primary current transformer; collecting data therefrom; transmitting the collected data to a server having an operatively connected monitor; and displaying the collected data on the monitor in substantially real-time. The server also collects information about the performance of the furnace from a programmable logic computer and information entered manually by an operator at a furnace monitoring viewer system, which may also be displayed in substantially real-time on the monitor.

Claims (17)

1. A method for monitoring an electric arc furnace having a monitoring device, programmable logic controller and a furnace monitor viewing system, the method comprising the steps of:

providing a furnace monitoring system server;

receiving at the furnace monitoring system server electrical data from the monitoring device correlating to electrical parameters of input power to the electrical arc furnace;

receiving, at the furnace monitoring system server, process data transmitted from the programmable logic controller correlating to at least one of heat time, oxygen and natural gas consumption, process weights, temperatures and end-of-heat signals;

receiving at the furnace monitoring system server furnace operation data entered manually by an authorized user;

displaying the received electrical data, process data, and manually entered operation data for viewing in substantially real-time by a user;

transmitting at predetermined intervals the electrical data, process data and manually entered operation data from the furnace monitoring system server to a web server and storing the transmitted data in a remote database located on the web server; and

accessing the remote database via the Internet and generating a report detailing historical operation of the furnace, the report including the manually entered operation data, wherein the report includes a plurality of:

performance reporting in graphical format,

refractory wear reporting,

event log reporting,

electrode consumption reporting,

electrode usage and inventory reporting, and

information about furnace heats collected according to any or all of single heats, daily heats, daily shift heats, weekly heats, monthly heats, heats by date range and conditions.

2. The method of claim 1 , wherein the electrical parameters of the input power to the electric arc furnace comprises a current on the primary side of a primary current transformer.

3. The method of claim 1 , wherein said report is generated using the stored electrical data, process data and manually entered operation data.

4. The method of claim 1 , wherein said step of displaying the received electrical data, process data, and manually entered operation data is performed at the furnace monitor viewing system.

Assignments (16)
CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT NUMBERS PREVIOUSLY RECORDED AT REEL: 70291 FRAME: 686. ASSIGNOR(S) HEREBY CONFIRMS THE RELEASE OF SECURITY INTEREST. Recorded Mar 28, 2025
From: JPMORGAN CHASE BANK, N.A.
To: GRAFTECH INTERNATIONAL HOLDINGS INC. (F/K/A AS UCAR CARBON COMPANY INC.)
Reel/Frame 071632/0215 →
TERMINATION AND RELEASE OF PATENT SECURITY AGREEMENT (REEL 064075 FRAME 0455) Recorded Dec 23, 2024
From: U.S. BANK TRUST COMPANY
To: GRAFTECH INTERNATIONAL HOLDINGS INC.
Reel/Frame 069762/0491 →
TERMINATION AND RELEASE OF PATENT SECURITY AGREEMENT (REEL 054724 FRAME 0588 AND 063798 FRAME 0928) Recorded Dec 23, 2024
From: U.S. BANK TRUST COMPANY
To: GRAFTECH INTERNATIONAL HOLDINGS INC.
Reel/Frame 069762/0518 →
SECURITY INTEREST Recorded Dec 23, 2024
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: U.S. BANKS TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 072905/0497 →
SECURITY INTEREST Recorded Dec 23, 2024
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: U.S. BANKS TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 072905/0832 →
SECURITY INTEREST Recorded Dec 23, 2024
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: GLAS AMERICAS LLC
Reel/Frame 069666/0444 →
SECURITY INTEREST Recorded Jun 27, 2023
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 064075/0455 →
SECURITY INTEREST Recorded Dec 22, 2020
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: U.S. BANK NATIONAL ASSOCIATION, AS AGENT
Reel/Frame 054724/0588 →
RELEASE OF SECURITY INTEREST Recorded Feb 12, 2018
From: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
To: GRAFTECH INTERNATIONAL HOLDINGS INC.
Reel/Frame 045308/0567 →
SECURITY INTEREST Recorded Feb 12, 2018
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 045308/0591 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 24, 2018
From: UCAR CARBON COMPANY INC.
To: AMI GE
Reel/Frame 044722/0307 →
SECURITY AGREEMENT Recorded Jun 10, 2015
From: GRAFTECH INTERNATIONAL HOLDINGS INC.; FIBER MATERIALS INC.
To: JPMORGAN CHASE BANK N.A., AS COLLATERAL AGENT
Reel/Frame 035839/0754 →
SECURITY AGREEMENT Recorded Jul 14, 2010
From: GRAFTECH INTERNATIONAL HOLDINGS INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 024678/0830 →
CHANGE OF NAME Recorded Oct 15, 2007
From: UCAR CARBON COMPANY INC.
To: GRAFTECH INTERNATIONAL HOLDINGS INC.
Reel/Frame 019961/0697 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 13, 2005
From: GERHAN, RONALD E.; LUGO, NICOLAS; LEHR, DAVE A.; GARCIA, FERNANDO MARTINEZ
To: UCAR CARBON COMPANY INC.
Reel/Frame 017075/0175 →
SECURITY AGREEMENT Recorded Apr 4, 2005
From: UCAR CARBON COMPANY INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 015878/0445 →
Continuity (1)
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