Thermal energy recovery by basic oxygen furnace offgas preheating of scrap

Technical Report · Tue Jan 01 04:00:00 EST 1974

OSTI ID:7353537

Drost, J J; Daellenbach, C B; Mahan, W M; Hill, W C

The feasibility of basic oxygen furnace (BOF) offgas heat recuperation by preheating scrap was investigated on a pilot plant scale by the Bureau of Mines. In this study, offgases generated during the oxygen blowing of a molten pig iron and scrap charge were passed through a static bed of shredded auto scrap. Scrap quantities varying from 100 to 180 lb and representing from 22 to 40 percent of the 450-lb BOF metallic charge were preheated in this manner. Average scrap bed temperatures of 1650/sup 0/F for 100 lbs of scrap and 1150/sup 0/F for 180 lb of scrap have been achieved during the blows. As compared to cold scrap used in the normal BOF practice, it was found that by preheating scrap, usage could be increased by 43 percent. The thermal energy recovered by this preheating method can account for up to 44 percent of the energy necessary to melt the scrap.

• Research Organization: Bureau of Mines, Twin Cities, Minn. (USA). Twin Cities Metallurgy Research Center
• OSTI ID: 7353537
• Report Number(s): BM-RI-7929
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
ELEMENTS
ENERGY
ENERGY RECOVERY
ENERGY SOURCES
FUEL ECONOMY
FURNACES
HEAT
HEAT RECOVERY
IRON
MELTING
METALS
PHASE TRANSFORMATIONS
RECOVERY
TRANSITION ELEMENTS
WASTE HEAT
WASTES