| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a combustion control method and its device capable of carrying out stable mass product reducing operation by completely burning unburnt gas generated in a heating zone and a reducing zone while controlling a furnace temperature in the heating zone. <P>SOLUTION: In combustion control of a reduced iron manufacturing plant, mass products formed with metal oxide and reducing agent mixed and granulated are loaded into a rotary hearth furnace and heated and reduced by burners 4, 5 provided in the heating zone 2 and the reducing zone 3, respectively, and the reduced mass products are collected. A difference between the furnace temperature detected by a furnace temperature meter 6 installed in the heating zone 2 for controlling the furnace temperature in the heating zone 2 and a target set temperature in heating zone is computed, and in accordance with a computation result obtained by the computation, a fuel amount calculated by a fuel amount computing device 12 is increased/decreased to a fuel amount to be output at the furnace temperature detected by a furnace temperature meter 7 installed in the reducing zone 3 to control the fuel amount of the burner 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
