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在150kg 中频炉上以轧钢铁皮为脱硅剂(粒度为-80目),采用喷粉法进行了铁水脱硅试验。试验证明,供氧速度是决定脱硅过程的主导因素。当铁水初始温度为1400±30℃,供氧速度为0.60～1.00m~3/t 铁·min(即供粉速度为3.5～6.0kg/t 铁·min)时,可将铁水硅含量从0.6～0.8%降到0.2～0.15%,甚至更低。如将供氧速度控制在0.60m~3/t 铁·min 以下,可做到优先脱硅并同时“保锰”(脱锰量不大于50%)“保碳”(脱碳量不大于0.10%),温降可控制在～50℃。
In 150kg intermediate frequency furnace with rolled steel sheet as desiliconization agent (particle size of -80 mesh), the use of dusting method was desiliconized hot metal test. Experiments show that the rate of oxygen supply is the dominant factor that determines the desiliconization process. When the initial temperature of hot metal is 1400 ± 30 ℃, the oxygen supply rate is 0.60 ~ 1.00m ~ 3 / t iron · min (ie, the feeding speed is 3.5 ~ 6.0kg / t iron · min) ~ 0.8% down to 0.2 ~ 0.15%, or even lower. If the oxygen supply rate is controlled at 0.60m ~ 3 / t iron · min or less, priority can be given to desiliconization and at the same time “Paul manganese” (manganese removal of not more than 50%) “Paul carbon” (decarburization less than 0.10 %), Temperature drop can be controlled at ~ 50 ℃.