| 摘要 |
PROBLEM TO BE SOLVED: To provide a control method and a control device of a melting furnace, capable of reducing running cost, while realizing stable melting of slag. SOLUTION: When a discharge quantity of the melting slag is excessively small for a specific time or more (S1 : YES), and when the oxygen concentration is a predetermined range (S5, S6 : NO), a heavy oil quantity and a combustion air quantity are increased (S10 and S11). When the oxygen concentration is smaller than a lower limit value (S5 : YES), the combustion air quantity is increased (S6), and when the oxygen concentration is larger than an upper limit value (S7 : YES), the combustion air quantity is reduced (S8). Here, when controlling the combustion air quantity (S6 and S8), and when the melting furnace temperature does not rise (S9 : NO), the heavy oil quantity and the combustion air quantity are increased (S10 and S11). While, when the discharge quantity of the melting slag is excessive for the specific time or more (S2 : YES), the heavy oil quantity and an air quantity are reduced (S3). COPYRIGHT: (C)2006,JPO&NCIPI
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