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在料堆的顶部会形成主要由小块料、粉料组成的炉料堆尖,炉料堆尖对高炉煤气流有很强的阻滞作用。不同的炉顶设备对炉料堆尖的展开能力是不一样的:双钟炉顶只能将炉料堆尖展开成一个扇形面,布料能力较弱;无钟炉顶虽具有灵活的布料方式,但在中小型高炉上却很难做到多环布料,其布料能力得不到发挥;漏斗式炉顶可将炉料堆尖展开成一个很宽的环状带,布料能力较强。
In the top of the pile will be formed mainly by the small pieces of material, powder composition of the pile tip, the burden of blast furnace gas flow on the blast furnace has a strong block. Different roof devices have different ability to expand the tip of the charge: the double-bell roof can only expand the tip of the charge into a fan-shaped surface, and the fabric has a weak capability. Although the top of the bellless top has a flexible fabric arrangement, In small and medium-sized blast furnace is difficult to achieve multi-ring fabric, the fabric can not get the ability to play; funnel-style furnace top can be stacked pile tip into a wide belt, fabric ability.