Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1994-06-06
1995-10-17
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
F23G 704
Patent
active
054586720
ABSTRACT:
A Process for combusting sulfur vapor released from a sulfur bearing material, comprising:
(a) introducing a sulfur bearing material into a furnace having a combustion zone;
(b) ejecting at least one fuel stream with or without a substoichiometric amount of at least one primary oxidant stream and combusting said at least one fuel stream with the substoichiometric amount of the primary oxidant stream or ambient gas in the combustion zone to produce heat sufficient to release some sulfur vapor from the sulfur bearing material and to form combustion products containing unburned fuel;
(c) ejecting at least one secondary oxidant stream angled away or spaced from the fuel stream and primary oxidant stream;
(d) causing a recirculating flow within the combustion zone to dilute at least a portion of the combustion products, secondary oxidant, sulfur vapor, unburned fuel and ambient gas in the furnace; and
(e) combusting the sulfur vapor and the unburned fuel with said secondary oxidant. Alternatively, the fuel stream may be introduced with a superstoichiometric amount of the primary oxidant stream, with or without the secondary oxidant, such that excess oxygen is reacted with sulfur vapor released from the sulfur bearing material to produce more heat.
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Waste Combustion in Boilers and Industrial Furnaces, Mar. 2-4, 1993 "The use of Oxygen for Spent Acid Recovery and Hazardous Waste Disposal", by Maynard G. Ding.
Denninger Douglas E.
Pak Chung K.
Praxair Technology Inc.
Rosenberg Peter D.
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