Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1975-07-31
1978-03-14
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
48210, C10J 308
Patent
active
040789144
ABSTRACT:
The combustion of refuse, including all types of trash and garbage, in the presence of coal and/or coke and a fluxing agent in a vertical shaft furnace provides for the clean combustion of the refuse, the recovery of metallic wastes and the enhanced production of a gaseous fuel. By blending the refuse with the coal and/or coke and fluxing agent in a coal reaction, a fairly even distribution of the refuse will be achieved to prevent the compaction of the refuse and clogging of the furnace and to provide a more uniform controllable combustion temperature within the furnace thereby prolonging the life of the furnace lining. By using a conventional blast furnace, iron ore and/or scrap metal can also be added to the feed stock for the production of pig iron and the steam generated as a result of the high moisture content of the refuse can be utilized to react with the nascent pig iron within the furnace for the production of hydrogen to enrich the blast furnace gas to provide a high quality fuel gas. The refuse can be added directly to the furnace or be subjected to a preheating operation to reduce the moisture content and volume of the refuse. The steam generated in the pretreatment can be directed into the furnace to cause an enrichment of the furnace effluent gas or be utilized directly for heating or power generation.
REFERENCES:
patent: 3729298 (1973-04-01), Anderson
patent: 3830636 (1974-08-01), Marsh
patent: 3850588 (1974-11-01), White
patent: 3909446 (1975-09-01), Miyashita et al.
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