高炉中的硅来自焦炭和煤粉中的灰分，以及矿石中的脉石(渣)。焦炭和煤粉，

Silicon in blast furnaces comes from coke and ash in coal dust, and gangue (slag) in ore. <br>Coke and coal dust, depending on their mass, contain approximately 10% ash. The content of basic oxides in ash is less, mainly SiO2. In addition, this part of SiO2 exists in a highly active free state, and SiO2 exists in the form of silicate. Compared with easy reduction, it is the main source of silicon in molten iron. In addition, coke ash contains SiO2. It has uniform and close contact with coke, and the thermodynamic and kinetic conditions of its reduction reaction are favorable for the reduction of silicon. <br>The SiO2 used in the blast furnace is contained in the gangue of sintered ore, pellet ore or natural massive ore. SiO2 mostly exists in the form of silicate and has high stability. Compared with SiO2 in coke and coal powder, it is more difficult to reduce. However, since the amount of SiO2 entering the furnace is large, and the [Si] generated by reduction can form various stable compounds with Fe, the reduction reaction of this part of SiO2 can also occur. Therefore, slag is also a silicon source that cannot be ignored, and has a significant impact on the [Si] content of molten iron.

The silicon in the blast furnace comes from the ash in coke and coal powder, as well as the gangue (slag) in the ore.<br>Coke and coal powder, based on their mass, contain approximately 10% ash. The content of basic oxide in ash is less, and SiO2 is the main content. In addition, this part of SiO2 exists in a highly active free state, while SiO2 exists in the form of silicates. Compared to easy reduction, it is the main source of silicon in molten iron. In addition, the coke ash contains SiO2. Having uniform and close contact with coke, the thermodynamic and kinetic conditions of its reduction reaction are conducive to the reduction of silicon.<br>The SiO2 used in blast furnaces is contained in the gangue of sintered ore, pellet ore, or natural lump ore. SiO2 mostly exists in the form of silicates and has high stability, making it more difficult to reduce compared to SiO2 in coke and coal powder. However, due to the large amount of SiO2 entering the furnace and the ability of the reduced [Si] to form various stable compounds with Fe, this part of SiO2 reduction reaction can also occur. Therefore, slag is also a silicon source that cannot be ignored and has a significant impact on the [Si] content of molten iron.

Silicon in blast furnace comes from ash in coke and pulverized coal, and gangue (slag) in ore.<br> Coke and pulverized coal, according to their mass, contain about 10% ash. The content of basic oxides in ash is less, mainly SiO2 _ 2. In addition, this part of SiO _ 2 exists in a highly active free state, and SiO _ 2 exists in the form of silicate. Compared with easy reduction, it is the main source of silicon in molten iron. In addition, the coke ash contains SiO2. It is in uniform and close contact with coke, and the thermodynamic and kinetic conditions of its reduction reaction are conducive to the reduction of silicon.<br> The SiO _ 2 used in blast furnace is contained in the gangue of sinter, pellet or natural lump ore. SiO _ 2 mostly exists in the form of silicate, which has high stability and is more difficult to reduce than that in coke and pulverized coal. However, due to the large amount of SiO _ 2 entering the furnace, and the [Si] generated by reduction can form various stable compounds with Fe, the reduction reaction of this part of SiO _ 2 can also occur. Therefore, slag is also a non-negligible silicon source, which has a significant impact on the [Si] content of molten iron.