Process for working up steel slags and iron carriers for obtaining pig iron and environmentally safe slags
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 25, 2001
Grant Date -
N/A
app pub date -
May 14, 1999
filing date -
Sep 15, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a process for working up steel slags and iron carriers such as, e.g., electric furnace slags, converter slags, fine ores, dusts from steel production, mill scales for obtaining pig iron and environmentally safe slags, the volume ratio of molten slag to iron bath is chosen to be larger than 0.5 to 1 and, preferably, 0.8:1 to 1.5:1 and the slags are supplemented with SiO.sub.2 carriers such as, e.g., foundry sands, metallurgical sands and/or fine ores so as to adjust a slag basicity (CaO/SiO.sub.2) of between 1.0 and 1.8 and, preferably, 1.2 and 1.8 at an Al.sub.2 O.sub.3 content of between 10 and 25% by weight, based on the slag. In doing so, hot blast is top-blown and coal, optionally along with an inert gas and, in particular, nitrogen and, furthermore, optionally oxygen or hot air is blown through the iron bath.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully