共查询到16条相似文献,搜索用时 187 毫秒
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以互相耦合的炉膛辐射换热和铜液内部导热两部分能量平衡式建立了铜精炼阳极炉还原过程燃烧用液化气消耗最小的真实目标泛函 ,采用变分法对真实目标泛函极值进行了求解 ,得出了铜精炼阳极炉还原过程中粗铜熔液最优升温曲线、最优升温速度曲线以及液化气消耗最优曲线。此最优控制模型为铜精炼阳极炉还原过程在线优化控制以及节能降耗提供了理论基础。 相似文献
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根据能量平衡原理,建立了基于富氧助燃预热下铜精炼阳极炉高温烟气热损失的数学模型,并根据该模型进行计算。结果表明:随着预热燃烧风中含氧量的增加,铜精炼阳极炉还原期高温烟气热损失减少趋势十分明显,节能效果显著。此外,给出了一些合理化建议,有利于铜精炼阳极炉还原期节能效果进一步提高。 相似文献
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针对转底炉生产存在产品金属化率低、冶炼能耗高、烟气含尘量大、生产效率低等问题.通过建立转底炉冶炼数学模型,计算了不同工艺参数对转底炉冶炼能耗的影响规律.结果表明:转底炉产品金属化率与烟气对含碳球团的二次氧化有关,增大还原区煤气供应量,可以减少含碳球团二次氧化,提高产品金属化率;助燃风预热温度和富氧率对冶炼能耗影响显著,提高助燃风预热温度和富氧率可以降低燃烧消耗,提高冶炼效率.助燃风预热温度每提高100℃,煤气消耗可以减少75 m3;助燃风富氧率达到20%时,煤气消耗量减少50%,烟气量减少57%. 相似文献
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根据能量平衡原理,建立了基于燃烧风预热下铜精炼阳极炉重油流量数学模型,并根据不同预热燃烧风温度对铜精炼阳极炉氧化期重油流量数学模型进行计算。结果表明:随着燃烧风预热温度增加,铜精炼阳极炉氧化期重油流量减少趋势十分明显,节能效果显著。此外,给出了一些合理化建议,有利于铜精炼阳极炉氧化期节能效果进一步提高。 相似文献
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The critical heat flux surveys of thirteen Chinese blast furnaces were carried out.The mathematical model of hearth bottom was established and the temperature field was simulated by utilizing the method of inverse problem based on the collected parameters and temperature data.The critical heat flux and dangerous critical heat flux of hearth were defined and analyzed as well as the initial and investigative critical heat flux of hearth,and the influences of thermal conductivity and residual thickness of carbon bricks on critical heat flux were discussed.The relationships between critical heat flux of stave and hearth bricks were also compared.It is found that the dangerous critical heat flux of these blast furnaces ranged from 9.38 to 57kW/m2.Therefore,there was no uniform critical heat flux of hearth due to the structure design,refractory materials selection,construction quality of hearth and other factors.The heat flux should be lower than the critical heat flux with corresponding thickness of carbon bricks to control the erosion of hearth.The critical heat flux of stave would be much lower than that of hearth bricks with the air gap.However,the critical heat flux of stave should be higher than that of hearth bricks when gas existed between furnace shell and staves. 相似文献
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