| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize operation and to improve productivity by constantly retaining the height of a coke bed. <P>SOLUTION: In the operating method of a vertical type melting furnace in which a solid fuel is used, which is ventilated from a tuyere, and in which an iron source is melted or performed with melting and reducing to manufacture a pig iron: (i) two or more in-furnace observation containers are disposed in a height direction and/or in a furnace circumferential direction at upper side furnace wall by 0.5-1.5 m from a tuyere in a vertical type melting furnace having one step of a tuyere and from a lower step tuyere in a vertical type melting furnace having two steps of a tuyere; (ii-1) the in-furnace observation container having a suitable height for an interim operation is decided; and (ii-2) the height of the coke bed is observed from the in-furnace observation container while operating. The amount of the coke mixing in a charged material is increased and decreased according to the vertical variation of the height of the coke bed so that the height of the coke bed may become the same level of the height of the in-furnace observation container having a height suitable for the interim operation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
