Title:
A BLOW-SMELTING PROCESS USING A TOP-AND BOTTOM-BLOWING CONVERTER
Document Type and Number:
WIPO Patent Application WO/1982/000835
Kind Code:
A1
Abstract:
A blow-smelting process employing top-and bottom-blowing techniques, in which part of the total oxygen feed is top-blown into the convertor and, therefore, a decrease in the lime powder-blowing ability dependent upon the naturally decrease bottom-blown oxygen feed has previously caused an initial burst often taking place when no lime powder is blown in bottom-blowing smelting. This process comprises bottom-blowing lime powder in the pattern of (CaO/SiO2)-1 x SiO2(Kg/t)13 (Kg/t) in the initial stage of blow smelting, and 3 Kg/t in the terminal stage, thereby solving the problem of the initial burst and improving the efficiency of removing phosphorus in the terminal stage. This process is applied to the production of steel from molten pig iron as a main source.
Inventors:
YAMADA H (JP)
OMORI H (JP)
OMORI H (JP)
Application Number:
PCT/JP1981/000205
Publication Date:
March 18, 1982
Filing Date:
August 31, 1981
Export Citation:
Assignee:
KAWASAKI STEEL CO (JP)
YAMADA H (JP)
OMORI H (JP)
YAMADA H (JP)
OMORI H (JP)
International Classes:
C21C5/34; C21C5/35; C21C5/36; (IPC1-7): C21C5/34; C21C5/32
Foreign References:
| JPS4876715A | 1973-10-16 | |||
| JPS55107715A | 1980-08-19 |
Other References:
See also references of EP 0058725A4
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