It is important to prevent vapor explosion for steel mill industries for the reason that explosions can produce overpressure which cause buildings and facilities to rupture. The spontaneous vapor explosion occurs when a molten slag contacts with coolant. In this research, the molten slag which includes more than 10 chemical compositions produced in actual steel mill industries is employed. Three types of coolant were employed which can be used in real industries such as tap water, freshwater, and yard coolant. Spontaneous vapor explosion occurred when the yard coolant, which has a higher concentration of salt than either tap water or freshwater, was used as coolant. When the vapor explosion occurred, the temperature of the yard coolant was exclusively investigated in the range of 40°C to 55°C. The vapor explosion was independent of the molten slag temperatures employed. The vapor explosion in this work was attributed to the high salt concentration of the yard coolant, which improved the heat transfer to the vapor film around the molten slag droplet. The heat transfer promoted the vapor film to collapse and triggered the spontaneous vapor explosion.

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钢铁行业的蒸汽爆炸：熔融炉渣和冷却液的化学成分分析

对于钢铁行业而言，防止蒸气爆炸是很重要的，因为爆炸会产生超压，从而导致建筑物和设施破裂。当熔融的炉渣与冷却液接触时，会发生自发的蒸气爆炸。在这项研究中，使用了熔渣，熔渣包括在实际的钢铁工业中生产的10多种化学成分。使用了三种类型的冷却剂，它们可用于实际工业中，例如自来水，淡水和院子冷却剂。当使用院子冷却液（其盐浓度高于自来水或淡水）作为冷却液时，会发生自发的蒸汽爆炸。当发生蒸气爆炸时，专门研究堆场冷却剂的温度在40°C至55°C的范围内。蒸气爆炸与所采用的熔融炉渣温度无关。这项工作中的蒸气爆炸归因于堆场冷却剂的高盐浓度，这改善了向熔渣滴周围的蒸气膜的热传递。传热促使蒸气膜塌陷并引发自发蒸气爆炸。