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本文从高炉内料层流化时,炉内压差与悬浮在流体中的固体颗粒重量关系和厄贡方程推导出临界冶炼强度公式,并以此分析临界冶炼强度与炉型、操作条件和炉料性能的关系。在目前高炉生产条件下,冶炼强度远低于临界冶炼强度,其主要原因是炉料粒度组成及分布不均匀,从而易导致局部流化乃至管道行程。随之导出管道和散料层压力平衡方程,得出其煤气流速之比与炉料几何特性的关系,以此探讨合理的煤气流分布。
In this paper, the formula of the critical smelting strength is derived from the relation between the pressure difference in the furnace and the weight of solid particles suspended in the fluid when the fluidized bed is fluidized in the blast furnace. The critical smelting strength formula is derived from the Ergon’s equation. The critical smelting strength, furnace type, operating conditions and charge The relationship between performance. Under the current blast furnace production conditions, the smelting strength is much lower than the critical smelting strength, which is mainly due to the uneven size and distribution of the charge, which can easily lead to localized fluidization and even pipeline travel. Subsequently, the pressure balance equation between pipe and bulk material is deduced, and the relationship between the ratio of gas flow velocity and the geometry of charge is obtained, so as to explore the reasonable gas flow distribution.