ZhenAn Ferro Silicon 72
Coke is the main raw material for smelting ferrosilicon, and it is also the reducing agent for smelting ferrosilicon. Therefore, the fixed carbon content in the coke is required to be as high as possible, greater than 84%, and the ash content of the coke is required to be low. When the ash content of coke is high, the amount of slag increases. Since the ash contains about 60% aluminum oxide, the slag becomes sticky and difficult to remove. In addition, adding coke with high ash content into the furnace will easily cause the material surface to sinter, affecting the air permeability. Therefore, it is required that the ash content of coke should be less than 13%.
Ferro Silicon 65
Most of the carbon in coke exists in the form of fixed carbon, but a small amount of carbon also exists in the form of hydrocarbons (commonly called volatiles). This part of the hydrocarbons volatilizes away at high temperatures, so the volatile content of the coke should not be greater than 2%.
The greater the resistance of coke at high temperatures, the deeper the electrode is inserted into the charge, which helps to increase the furnace temperature and thereby expand the crucible. The large porosity of coke not only has high resistance, but also has a large surface area, which increases the chemical reaction area and accelerates the speed of chemical reactions.
Ferro Silicon
Of course, there are certain requirements for the particle size of coke. If the particle size of coke is too large, it will be difficult for the motor to be inserted into the charge, which will affect the normal production of smelting. However, if the particle size is too small, the burning loss of the electric furnace will be too large. Therefore, the particle size of coke is generally less than 8 mm. should. For small-capacity ferrosilicon alloy smelting, a small amount of coke powder can be used instead of coke.
