| 摘要 |
PURPOSE:To stabilize the operation of a hot stove and to assure stability in a flash smelting furnace operation by providing means for decreasing stepwise the flow rate of the heavy oil to be used so as to optimize the regeneration of the temp. of the hot wind to be blown into flash smelting furnace for smelting of copper in which a solid carbon material is used as essential fuel. CONSTITUTION:The hot wind is fed from the hot wind furnace to the flash smelting furnace for smelting of copper in which at least 80% solid carbonaceous fuel is used as fuel. The relation indicating the optimum quantity of heat regeneration holds between the opening degree of a cold mixing valve for introducing cold wind and the waste gas temp. upon ending of combustion with respect to the temp. of said hot wind. The optimum temp. TF of the regenerative waste gas is determined from said relation and the flow rate of the heavy oil is stepwise changed to meet the increase of the waste gas temp. up to TF. The set temp. for decreasing the heavy oil is made into, for example, 4 stages; T1-T4. X is designated as the initial flow rate of the heavy oil and Y as the weight of the heavy oil to be decreased. The combustion is started at the initial flow rate Xl/hr and is decreased by Yl/hr each at the temps. T1-T4 until the optimum heat regeneration condition is attained at the temp. TF.
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