DEWEIN H NAFFZIGER
Engineering in Warren, OH
License number
Massachusetts 27063
Expiration Date
Jun 30, 1984
Type
Metallurgical Engineer
Address
Address
Warren, OH 44483
Professional information
Process For The Removal Of Rust From Cast Iron Borings And The Like In Preparation For Melting
US Patent:
4360379, Nov 23, 1982
Filed:
May 12, 1980
Appl. No.:
6/148651
Inventors:
Dewein H. Naffziger - Warren OH
International Classification:
C21C 542
US Classification:
75 43
Abstract:
Process and means for the removal of iron rust from cast iron borings or chips to prepare the same for melting. The process involves the heating and agitation of such borings or chips, converting the rust of the same to magnetite and chemically uncombined water, eliminating the water from the chips or borings, screening the particles to remove the converted material, charging the balance of the substantially oxide free borings into a melting furnace, wherein the rate of the charge and the melting temperatures can be maintained substantially constant during the melting process to provide a uniform slag-free operation.
Process For Melting Cast Iron Borings
US Patent:
4162156, Jul 24, 1979
Filed:
May 2, 1977
Appl. No.:
5/792553
Inventors:
Dewein H. Naffziger - Warren OH
Assignee:
Advance Achievement Systems, Inc. - Warren OH
Wisconsin Centrifugal Inc. - Waukesha WI
Wisconsin Centrifugal Inc. - Waukesha WI
International Classification:
C21C 552
US Classification:
75 12
Abstract:
Process for melting cast iron borings comprising continuously charging dried borings into a coreless induction furnace operated within controlled metal levels to achieve adequate stirring of the molten metal in the furnace, drawing incoming borings beneath the meniscus of the molten metal surface, controlling the dissolved oxygen content of the molten metal to ensure formation of carbon oxide and thus achieve a "slag free" operation. The rate of feed of the borings is controlled according to the power input to maintain a predetermined constant temperature of the molten metal. Apparatus relating to the foregoing process is also disclosed.