Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1989-10-16
1991-10-08
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75958, 208426, 208427, C21B 1102
Patent
active
050551310
ABSTRACT:
A process and arrangement are provided for the efficient generation of energy from coal, while at the same time providing for a relatively inexpensive step in processing of iron or steel, and the extraction of valuable materials such as oils from coal. An advantage to the process is that relatively low quality coals can be utilized, since the coal is pretreated before any burning operation. Generally, the process involves three interacting stages. In the First Stage, a coal liquefaction/pyrolysis procedure is utilized to drive off volatiles, and form a very low volatile char. The volatiles can be collected and utilized as a valuable oil product, such as for diesel fuel or the like. The char material is preferably pelletized and utilized as a reductant, in a Second Stage of iron reduction and melting. Preferably the iron reduction and melting operation is conducted in a cupola and the hot product gases are utilized directly and/or indirectly, to generate electricity in Stage Three, and to produce hot steam for use in driving certain portions of Stages One and Two.
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Andrews Melvyn J.
Northern States Power Company
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