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Based on the principles of mass, momentum and heat transfers between the reducing gas and the iron ore solid, a two-dimensional
mathematical model for above two phases is established to study the influences of reducing gas composition on thermal and
reduction conditions in pre-reduction shaft furnace with the temperature ranging from 1 023 to 1 223K. Due to the strong endothermic
effect of iron ore reduction participated by hydrogen (H2), increasing the ratio of carbon monoxide (CO) to H2 enlarges high temperature zone under present calculation conditions, thus improves reduction efficiency inside the furnace.
In addition, replacing of the reducing gas with an appropriate proportion of nitrogen (N2) featuring the same temperature has a potential to reduce fuel consumption by as much as 6.5% while the products of similar
quality are yielded. 相似文献
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基于均匀法的风雨载荷下折叠式舱口盖拓扑优化设计研究 总被引:1,自引:0,他引:1
本文以48500DWT散货船舱口盖为研究对象,提出改变传统折叠式舱口盖设计方法,引入拓扑优化的方法对舱口盖横梁腹板、纵桁腹板进行优化设计。通过ANSYS模拟仿真分析,找出最佳力传递路径的结构布置形式,根据优化结果提取节点信息,经过对拓扑优化后的模型进行二次优化,完善了拓扑优化的结果,使其材料布局形式更合理,研究结果表明,基于均匀法的拓扑优化方法运用于折叠式舱口盖的设计中,可改善舱口盖横梁腹板、纵桁腹板结构,保证其强度并且达到轻量化设计的目的,为舱口盖横梁腹板、纵桁腹板的结构设计提供参考依据。 相似文献
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