Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Reexamination Certificate
2006-08-01
2009-11-17
Wyszomierski, George (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C373S146000, C075S010480, C075S010500, C075S010570, C134S008000, C134S021000, C134S022100
Reexamination Certificate
active
07618473
ABSTRACT:
A method of restoring the electrical efficiency of channel and pressure pour furnaces includes plunging a fluxing material with a specially designed plunging lance. The plunging lance chamber containing the fluxing material is 24 to 32 inches in length, 3 inches in diameter and has a capacity to hold 5 to 7.5 pounds of flux briquettes. The plunging chamber has holes drilled along the length of the body. The fluxing material contains by weight from 8.0 to 28.7% CaCO3(calcium carbonate or limestone), from 0 to 18.5% MgCO3(magnesium carbonate), from 3.6 to 18.0% Al2O3(alumina) from 1.4 to 7.1% SiO2(silica), in the form of a complex aluminosilicate, and from 19.4 to 46.4% Na2O (sodium oxide), in the form of soda ash (sodium carbonate). The total level of sodium ranges from 23 to 26% and up to 10% sodium fluoride or sodium chloride may be substituted for soda ash.
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Naro Rodney L.
Williams David C.
McGuthry-Banks Tima M
Naro Rodney L.
Renner , Otto, Boisselle & Sklar, LLP
Wyszomierski George
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