| 摘要 |
PROBLEM TO BE SOLVED: To suppress scattering of a spitting granular iron or dust particles over a converter in converter refining.SOLUTION: In a refining method using a converter 1 having top-blown lance 2, it is adjusted so that a feeding velocity from the top-blown lance 2, Q is 3.5 to 7.0 (Nm/min./ton), a main raw material charge weight per 1 charge, W is in a range of 170 to 400 (ton), and the feeding velocity, Q (Nm/min./ton), an inner diameter of the converter, Din (m), a distance from throat 1c upper limit of the converter to a melting iron bath surface, L(m) and the main raw material charge weight, W (ton) satisfies the following formula. 3.5≤Q≤3.4×10×{Din×L×W}. Ground metals hardly adhere to the throat or a skirt part of the converter and stable operation becomes available. |
