C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
53/53
C21B 5/02 (2006.01)
Patent
CA 1308917
Abstract of the Disclosure A method for manufacturing a chromium-bearing pig iron comprises the steps of charging cold bond pellets, iron ore and coke lumps into a blast furnace from above and blowing a gas containing more than 50 % oxygen there- in and tuyere nose flame temperature control agent into the blast furnace through the tuyere, the cold bond pel- lets being comprised of powdered chromium ore and pow- dered coke as principal feed materials. The cold bond pellets are manufactured by performing a mixing, a pelletizing and a curing step. The tuyere nose flame temperature control agent is a top gas, steam, water or CO2, which is used to control the flame temperature to 2000 to 2900°C.
534800
Fukuyo Hiroshi
Matsuura Masahiro
Ohno Yotaro
Sato Kenkichi
Fukuyo Hiroshi
Matsuura Masahiro
Nippon Kokan Kabushiki Kaisha
Ohno Yotaro
Ridout & Maybee Llp
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