Gary P Tarcy

US Patent:

6440279, Aug 27, 2002

Filed:

Dec 28, 2000

Appl. No.:

09/750392

Inventors:

Dennis R. De Capite - Leechburg PA
Gary P. Tarcy - Murrysville PA
Susanne M. Opalka - Glastonbury CT
Don R. Careatti - Alcoa Center PA

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

B01D 5950

US Classification:

2042473, 2042431, 204292, 205385, 205386, 205387, 205372, 205538, 205543, 205544, 205545, 423593, 423594, 423595, 423600, 264104

Abstract:

A cermet inert anode having a reduced level of contaminating surface metal is disclosed. Methods for preparing cermet inert anodes and methods for treating cermet inert anodes are also disclosed. The methods generally use an oxidizing agent to convert metals on the surface of the anode to inert oxides and/or to otherwise remove the metal contaminants. The inert anodes of the present invention may be used in electrolytic reduction cells for the production of commercial purity aluminum, as well as other metals.

US Patent:

7179353, Feb 20, 2007

Filed:

Mar 11, 2004

Appl. No.:

10/799036

Inventors:

Ron D. Barclay - Summerville SC, US
Gary P. Tarcy - Murrysville PA, US
Robert B. Hosler - Sarver PA, US
Xiangwen Wang - Export PA, US
Jay N. Bruggeman - Harrison City PA, US

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

C25C 3/12

US Classification:

204246, 2042431, 204245, 204280, 204294

Abstract:

An electrolysis cell () contains a number of carbon anodes () having top, bottom and side surfaces, operating in molten electrolyte () in an aluminum electrolysis cell (), where gas bubbles () are generated at the anode surfaces and where alumina particles () are added to the top of the molten electrolyte, where the carbon anodes () have at least two inward slots () passing through the carbon anode () along the longitudinal axis of the carbon anode and also passing through only one front surface () of the carbon anode, where the height () of the slots () is from about 45% to 80% of the anodes thickness and the slotted front surfaces () are disposed toward the center of the electrolysis cell so that generated gas bubbles () are directed to the alumina particles.

US Patent:

7799189, Sep 21, 2010

Filed:

Feb 5, 2007

Appl. No.:

11/671392

Inventors:

Ron D. Barclay - Summerville SC, US
Gary P. Tarcy - Murrysville PA, US
Robert B. Hosler - Sarver PA, US
Xiangwen Wang - Export PA, US
Jay N. Bruggeman - Harrison City PA, US

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

C25B 11/02

US Classification:

204294, 204246, 2042431, 204245, 204280

Abstract:

An electrolysis cell () contains a number of carbon anodes () having top, bottom and side surfaces, operating in molten electrolyte () in an aluminum electrolysis cell (), where gas bubbles () are generated at the anode surfaces and where alumina particles () are added to the top of the molten electrolyte, where the carbon anodes () have one inward slot () passing through the carbon anode () along the longitudinal axis of the carbon anode and also passing through only one front surface () of the carbon anode, where the height () of the slot () is from about 45% to 80% of the anodes thickness and the slotted front surfaces () are disposed toward the center of the electrolysis cell so that generated gas bubbles () are directed to the alumina particles.

US Patent:

7820027, Oct 26, 2010

Filed:

Feb 5, 2007

Appl. No.:

11/671386

Inventors:

Ron D. Barclay - Summerville SC, US
Gary P. Tarcy - Murrysville PA, US
Robert B. Hosler - Sarver PA, US
Xiangwen Wang - Export PA, US
Jay N. Bruggeman - Harrison PA, US

Assignee:

Alcoa, Inc. - Pittsburgh PA

International Classification:

C25C 3/12

US Classification:

205376, 205391

Abstract:

An electrolysis cell () contains a number of carbon anodes () having top, bottom and side surfaces, operating in molten electrolyte () in an aluminum electrolysis cell (), where gas bubbles () are generated at the anode surfaces and where alumina particles () are added to the top of the molten electrolyte, where the carbon anodes () have at least two inward slots () passing through the carbon anode () along the longitudinal axis of the carbon anode and also passing through only one front surface () of the carbon anode, where the height () of the slots () is from about 45% to 80% of the anodes thickness and the slotted front surfaces () are disposed toward the center of the electrolysis cell so that generated gas bubbles () are directed to the alumina particles.

US Patent:

8088269, Jan 3, 2012

Filed:

Aug 11, 2010

Appl. No.:

12/854612

Inventors:

Gary Tarcy - Murrysville PA, US
Eliezer Batista - Pittsburgh PA, US
Xiangwen Wang - Murrysville PA, US

Assignee:

ALCOA Inc. - Pittsburgh PA

International Classification:

C25C 3/14
C25C 3/20

US Classification:

205392, 205389, 205372, 205336, 2042471, 204245, 2042431

Abstract:

System and method for measuring alumina qualities and communicating the same are disclosed. In one example, a system includes an aluminum electrolysis cell, a feeder configured to supply a feed stock using a feed stream to the aluminum electrolysis cell, and a measurement device in communication with the feed stream, the measurement device adaptable to receive, release, and determine at least one attribute associated with the feed stock.

US Patent:

8409409, Apr 2, 2013

Filed:

Mar 26, 2009

Appl. No.:

12/411639

Inventors:

Xiangwen Wang - Export PA, US
Robert Hosler - Sarver PA, US
Gary Tarcy - Murrysville PA, US

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

C25C 3/18
C25C 3/08
C25C 3/06
C25D 21/12
C25C 3/00

US Classification:

2042431, 2042286, 204401, 205 82, 205775, 205336

Abstract:

System, method and apparatus for measuring electrolysis cell operating conditions and communicating the same are disclosed. The system includes a selectively positionable member coupled to an analytical apparatus, wherein the selectively positionable is configured to move the analytical apparatus into and out of physical communication with a bath. The system may also include a crust breaker for breaking the surface of a bath and an electronic device for measuring bath level.

US Patent:

8206572, Jun 26, 2012

Filed:

Apr 29, 2009

Appl. No.:

12/432527

Inventors:

Xiangwen Wang - Murrysville PA, US
Gary Tarcy - Murrysville PA, US

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

C25C 5/00

US Classification:

205391, 205560, 210633, 75674

Abstract:

Systems, methods and apparatus for reducing impurities in electrolysis cells are disclosed. In one approach, a method includes feeding a particulate fines feed stream to a tank, mixing particulate fines (PF) with liquid, the liquid having a first liquid and a second liquid, and separating at least some of the first liquid from at least some of the second liquid. The particulate fines (PF) may include inlet carbon fines (CF) and inlet recyclable fines (RF). The first liquid may include a recovered recyclable fines portion (RF), and the second liquid may include a waste carbon fines portion (CF). The mass ratio of the recovered recyclable fines portion (RF) to the inlet recyclable fines (RF) may be at least about 0. 5. The mass ratio of the waste carbon fines portion (CF) to the inlet carbon fines (CF) may be at least about 0. 1.

US Patent:

20060254925, Nov 16, 2006

Filed:

May 16, 2006

Appl. No.:

11/383632

Inventors:

Michael Slaugenhaupt - Apollo PA, US
Neal Dando - Murrysville PA, US
Gary Tarcy - Murrysville PA, US

Assignee:

Alcoa Inc. - Pittsburgh PA

International Classification:

C25C 7/06

US Classification:

205335000, 204228600

Abstract:

Methods and systems for controlling operating conditions of electrolytic cells are provided, particularly aluminum electrolytic cells. The method may includes the steps of measuring offgas temperature from the electrolytic cell, comparing the measured offgas temperature to a target offgas temperature, and completing a predetermined action in response to the comparing step. The predetermined action may include one or more of changing a feed rate of feed materials supplied to the electrolytic cell or inspecting a crust of the electrolytic cell for an undesired condition, such as a crust hole. The system may include an electrolytic cell adapted to contain a molten metal mixture, a hopper adapted to provide feed material to the electrolytic cell, a hood adapted to contain offgas from the electrolytic cell, an exhaust duct interconnected to the hood and containing a thermocouple for measuring offgas temperature, and a control panel for receiving temperature measurements from the thermocouple.