FIELD: metallurgy.
SUBSTANCE: blast-furnace smelting method involves loading to the furnace of iron-ore charge and coke, supply to tuyeres of heated oxygen-saturated air, natural gas, tapping of cast iron and slag and simultaneous increase in oxygen flow rate by 0.15-0.20% in relation to blowing air and basicity of slag by 0.010-0.015 at increase in concentration of titanium in cast iron by 0.01%, over 0.10%. In addition, to central zone of blast-furnace mouth there loaded is oxidating additive with content of iron monoxide 20-50%, particle size of 5-100 mm, in quantity of 0.5-15.0% of iron-ore charge flow rate.
EFFECT: uniform forced blast-furnace run is provided; efficiency is increased; specific rate of coke and cast iron losses with slag are reduced.
1 tbl, 1 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF CONVERSION PIG IRON SMELTING IN BLAST FURNACE | 1995 |
|
RU2096475C1 |
METHOD OF BALST-FURNACE MELTING | 2007 |
|
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PROCESS OF BLAST FURNACE SMELTING | 1996 |
|
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METHOD OF BLUST-FURNACE HEARTH FLUSHING | 2007 |
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METHOD OF BLAST-FURNACE SMELTING | 2000 |
|
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METHOD OF IRON SMELTING | 1998 |
|
RU2135596C1 |
METHOD OF IRON SMELTING IN BLAST FURNACE | 2001 |
|
RU2207381C1 |
METHOD OF BLAST-FURNACE SMELTING | 2001 |
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RU2186854C1 |
METHOD OF BLAST-FURNACE MELTING | 2008 |
|
RU2359041C1 |
METHOD FOR CREATING PROTECTION LINING SLAG ON LINING OF HEARTH AND WELL OF BLAST FURNACE | 2005 |
|
RU2291199C1 |
Authors
Dates
2012-12-10—Published
2011-05-31—Filed