公开(公告)号：US11486022B2

公开(公告)日：2022-11-01

申请号：US15548900

申请日：2016-02-01

Applicant: JFE STEEL CORPORATION

Inventor： Hidekazu Fujimoto ,  Takashi Anyashiki ,  Toru Shiozawa

IPC: C21B5/00 ,  C22B1/242 ,  C10B53/08 ,  C21B13/00 ,  C10B1/04 ,  C10B31/02 ,  C10B45/00 ,  C10B57/06 ,  C10L5/04 ,  C10L5/06

Abstract: In a ferrocoke manufacturing method by shaping and carbonizing a mixture of coal and iron ore, a hardly softening coal having a button index (CSN) of not more than 2.0 is used as the coal. The coal can be a blend of hardly softening coal and easily softening coal, and the hardly softening coal can be a coal having a button index (CSN) of 1.0 and a volatile matter of not less than 17%, and the easily softening coal can be a coal satisfying that a value obtained by multiplying CSN of easily softening coal by a blending ratio of easily softening coal in all coals is a range of 0.3-5.2. The coal can also be a blend of hardly softening coal and easily softening coal, and the hardly softening coal can be a coal having a button index (CSN) of 1.5-2.0, and the easily softening coal can be a coal satisfying that a value obtained by multiplying CSN of easily softening coal by a blending ratio of easily softening coal in all coals is nit more than 5.0.

公开(公告)号：US20180023166A1

公开(公告)日：2018-01-25

申请号：US15548900

申请日：2016-02-01

Applicant: JFE STEEL CORPORATION

Inventor： Hidekazu Fujimoto ,  Takashi Anyashiki ,  Toru Shiozawa

IPC: C22B1/242 ,  C10B53/08 ,  C10L5/06 ,  C10B31/02 ,  C10B1/04 ,  C10L5/04 ,  C10B57/06 ,  C10B45/00

Abstract: In a ferrocoke manufacturing method by shaping and carbonizing a mixture of coal and iron ore, a hardly softening coal having a button index (CSN) of not more than 2.0 is used as the coal. The coal can be a blend of hardly softening coal and easily softening coal, and the hardly softening coal can be a coal having a button index (CSN) of 1.0 and a volatile matter of not less than 17%, and the easily softening coal can be a coal satisfying that a value obtained by multiplying CSN of easily softening coal by a blending ratio of easily softening coal in all coals is a range of 0.3-5.2. The coal can also be a blend of hardly softening coal and easily softening coal, and the hardly softening coal can be a coal having a button index (CSN) of 1.5-2.0, and the easily softening coal can be a coal satisfying that a value obtained by multiplying CSN of easily softening coal by a blending ratio of easily softening coal in all coals is nit more than 5.0.

公开(公告)号：US11111441B2

公开(公告)日：2021-09-07

申请号：US15737567

申请日：2016-06-13

Applicant: JFE STEEL CORPORATION

Inventor： Hidekazu Fujimoto ,  Takashi Anyashiki ,  Toru Shiozawa

IPC: C10B57/06 ,  C10B53/08 ,  C10B45/02 ,  C21B5/00

Abstract: A method for producing ferrocoke in which it is possible to use a cheap and poor-quality coal having a high ash content while suppressing the decrease of the strength in ferrocoke or formed coke and a special coal mixing is not performed with respect to the fusion frequently causing problems in the carbonization with the shaft furnace. In a method for producing ferrocoke by molding and carbonizing a mixture of coal and iron ore, the coal is a single coal or a mixture of plural coals and a non-caking or slight caking coal having a load average value of ash content of not less than 10.7% and a load average value of mean maximum reflectance of not less than 0.81% is used.