When a blast furnace with a volume of 5000 m3 was transferred to pulverized coal injection technology, an intense peripheral gas flow, which led to the combustion of shoulder and tuyere coolers, developed. It was not possible to eliminate this phenomenon either by methods of control “from above” or by reducing the diameter of tuyeres. To eliminate the peripheral gas flow, it is advisable on a furnace with a hearth diameter of 14.7 m to maintain the total mechanical energy of the combined blast flow at the tuyere cut at a level not lower than 2100–2600 kJ / s, and the total mechanical energy of the hearth gas flow not lower than 5100–5300 kJ /from. It is also necessary to form a narrow coke “vent” on the top of the blast furnace and to stretch the ore ridge as much as possible.

中文翻译：

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煤粉喷射熔炼气体动力模式规范化的可能性

当容积为 5000 m3 的高炉转为喷煤技术时，产生了强烈的外围气流，导致肩部和风口冷却器燃烧。无论是通过“从上方”控制的方法还是通过减小风口的直径，都无法消除这种现象。为消除外围气流，建议在炉膛直径为 14.7 m 的炉子上，将风口切割处组合鼓风流的总机械能保持在不低于 2100-2600 kJ/s 的水平，并且炉床气流总机械能不低于5100-5300 kJ /from。还需要在高炉顶部形成狭窄的焦炭“通风口”，并尽可能拉长矿脊。