Nicolas J Lugo

US Patent:

7991039, Aug 2, 2011

Filed:

Nov 30, 2004

Appl. No.:

10/999374

Inventors:

Ronald E. Gerhan - Avon Lake OH, US
Nicolas Lugo - Clarksville TN, US
Dave A. Lehr - Franklin TN, US
Fernando Martinez Garcia - Garza Garcia, MX

Assignee:

GrafTech International Holdings Inc. - Parma OH

International Classification:

H05B 7/18

US Classification:

373102, 373104, 373 60

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.

US Patent:

20070133651, Jun 14, 2007

Filed:

Dec 14, 2005

Appl. No.:

11/300688

Inventors:

Ronald Gerhan - Avon Lake OH, US
Nicolas Lugo - Clarksville TN, US
Theodore Kurela - Hinckley OH, US

International Classification:

F27D 17/00

US Classification:

373009000

Abstract:

A method for controlling the foaming of slag in an electric arc furnace is disclosed. The furnace comprises at least one electrode column. Current is applied to the electrode column, causing an arc to form between the tip of the electrode column and the scrap, melting the scrap. Impurities in the molten scrap metal rise to the surface forming slag. A meter determines the total harmonic distortion associated with the system. If the total harmonic distortion is greater than a predetermined set point, and the scrap metal is sufficiently molten, then a foaming agent is added thereto.