CAJ | 학술논문

通过对某厂生产的高炉铸铁冷却壁进行热阻分析，计算不同参数条件下冷却壁本体与冷却水之间的综合换热系数，从而探讨冷却水速、水垢厚度、涂层厚度、气隙厚度等因素对高炉冷却壁冷却能力的影响。结果表明，提高冷却水速、减少水垢、减小涂层厚度均可提高冷却壁本体与冷却水之间的综合换热系数；气隙热阻占总热阻的71．6％以上，是影响冷却壁冷却能力的限制性环节，减小气隙厚度可以明显提高综合换热系数。冷却壁本体与冷却水之间的综合换热系数在121．5～343．8 W／（m2·℃）范围内。
통과대모엄생산적고로주철냉각벽진행열조분석，계산불동삼수조건하냉각벽본체여냉각수지간적종합환열계수，종이탐토냉각수속、수구후도、도층후도、기극후도등인소대고로냉각벽냉각능력적영향。결과표명，제고냉각수속、감소수구、감소도층후도균가제고냉각벽본체여냉각수지간적종합환열계수；기극열조점총열조적71．6％이상，시영향냉각벽냉각능력적한제성배절，감소기극후도가이명현제고종합환열계수。냉각벽본체여냉각수지간적종합환열계수재121．5～343．8 W／（m2·℃）범위내。
Based on thermal resistance analysis for blast furnace cast iron stave ,the comprehensive heat transfer coefficients between the stave body and cooling water under different parameters were calcu‐lated .Effects of the cooling water velocity ,water scale thickness ,coating layer and air gap thickness on the cooling capacity of blast furnace stave were analyzed .Results show that increasing cooling wa‐ter velocity can increase the comprehensive heat transfer coefficients to some extent ,and these coeffi‐cients decrease linearly with the increase of the thickness of water scale and coating layer .Air gap thermal resistance accounts for more than 71 .6% of the total thermal resistance ,thus decreasing air gap thickness is the most effective way to enhance the cooling capacity of blast furnace stave .The comprehensive heat transfer coefficients between stave body and cooling water vary from 121 .5 to 343 .8 W/(m2 · ℃) .