重钢85t复吹转炉的水模型试验

Water Modelling for a 85 t Top-Bottom Combined Blown Converter at Chongqing Steel

通过重钢85t复吹转炉1：8的水模型，试验研究了顶枪枪位、底吹流量对转炉熔池混匀时间、炉口喷溅量、冲击深度和液面扰动的影响。实验表明，模型获得最大搅拌能的顶枪枪位为50～100mm；枪位在90～110mm时，由射流冲击引起的物理喷溅量达到最大值。建立了重钢85t转炉复吹工艺参数：冶炼前期顶枪枪位为1600～1760mm，底吹流量240～350m^3／h；中期两参数分别为1100～1300mm和160～200m^3／h，后期两参数分别为1040～1120mm和200～350m^3／h。

The effect of top lance level and bottom blowing flowrate on mixed time in bath, mouth spraying, penetration depth in steel and liquid surface fluctuation have been studied by 1 ： 8 water medelling of a 85 t top-bottom combined blown converter at Chongqing Steel. The test results showed that maximum stiming energy was obtained as the top lance level was at 50 ～ 100 mm and the spraying amount caused by top lance jet penetration was up to maximum as the top lance level was at 90 ～ 110 mm. The top-bottom blown parameters for the 85 t converter at Chongqing Steel has been established that in primary phase of melting the top lance level is 1 600 ～ 1 760 mm and the bottom blowing flowrate is 240 ～ 350 m^3/h; in second phase both parameters are 1 100 ～1 300 mm and 160～ 200 m^3/h respectively; and in later phase both are 1 040 ～ 1 120 mm and 200 ～350 m^3/h.