Study on Si Transfer Mechanism in a Blast Furnace

一种定义的家具是用来熔炼和二氧化碳气体的，是介绍的。<SiO_2>通过slag-metal反应减少，CaO-<SiO_2><Al_2O_3>-0-5% FeO（-MgO） slag和碳饱和的铁熔体被测量为可用于<Al_2O_3>或图形可加工的硅。硅的降低率是由金属硅的转移控制的。金属中的硅氧化物是由矿渣中的FeO转移控制的。“FeO对slag和金属之间硅减少进展的影响”是根据slag/金属界面中氧潜能变化的条件进行调查的。发现它<SiO_2>可以从slag中减去少于2%的FeO，到目前硅在热金属（0.2%）中的普通含量，因为slag/金属界面的氧潜能可能不受FeO在slag中控制。SiO generation from the reaction of CaO<SiO_2>-<Al_2O_3>slag with graphite was measured in the temperature range from 1700 to 1800 C。SiO2生成的速率是由<SiO_2>slag中的转移<SiO_2>控制的，而slag中的C反应则由<SiO_2>slag中的作用控制的<SiO_2>。SiC增加了slag和graphite之间的界面区域，SiO2生成的总数量和低温度下SiO2生成的比率。

An induction furnace was used for melting and CO gas was introduced.1. <SiO_2> reduction by slag-metal reaction.The Si reduction rate between CaO- <SiO_2> - <Al_2O_3> -0-5%FeO(-MgO) slag and carbon-saturated iron melt was measured by the use of <Al_2O_3> or graphite crucible. Silica reduction rate was controlled by the Si transfer in metal. The oxidation of Si in metal was controlled by the FeO transfer in slag. The effect of FeO on the progress of Si reduction between slag and metal was investigated in terms of the change in oxygen potential at the slag/metal interface. It was found that <SiO_2> can be reduced from slags with FeO of less than 2% to the extent of usual content of Si in hot metal (0.2%), since the oxygen potential at slag/metal interface may not be controlled any more by FeO in slag.2. SiO generation from blast furnace type slag.The amount of SiO generation by the reaction of CaO- <SiO_2> - <Al_2O_3> slag with graphite was measured in the temperature range from 1700゜ to 1800゜C. The rate of SiO generation was controlled by the <SiO_2> transfer in the slag with low activity of <SiO_2> , and by the reaction of C with <SiO_2> in the slag with high activity of <SiO_2> . Addition of SiC increased the interfacial area between slag and graphite, total amount of SiO generation and particularly the rate of SiO generation at lower temperature.