Title: Method for mfg. chromium-bearing pig iron
Application Number: 87103786 Application Date: 1987.05.25
Publication Number: 1015415 Publication Date: 1987.12.23
Approval Pub. Date: 1992.04.08 Granted Pub. Date: 1992.04.08
International Classifi-cation: C21B5/02
Applicant(s) Name: Nippon Kokan K.K. Address:
Inventor(s) Name: Masahiro matsuura;Yotaro Ono
Attorney & Agent: CHEN JIZHUANG LUO YINGMING
Abstract:
    A method for manufacturing a chromium-bearing pig iron (19) comprises the steps of charging cold bond pellets, iron ore (10) and coke lumps (11) into a blast furnace (13) from above and blowing a gas containing more than 50 % oxygen (16) therein and tuyere nose flame temperature control agent (18) into the blast furnace through the tuyere, the cold bond pellets being comprised of powdered chromium ore (5) and powdered coke (6) as principal feed materials. The cold bond pellets are manufactured by performing a mixing (7), a pelletizing (8) and a curing (9) 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 DEG C.
Time: 5