1. There are more steel scraps in the charge, the conductivity of the charge is strong, and the electrode insertion depth is less than that of 75 ferrosilicon smelting. The electrode insertion depth in high-power arc furnaces is about 800-1000mm, and in smaller furnaces it is 500-800mm.
Therefore, the surface height of the material should be smaller. The surface of the material in high-power arc furnaces should be 400-500mm below the upper edge of the furnace lining, and the surface of the material in low-power furnaces should be 300-400mm below the upper edge of the furnace lining. Because the electrode is inserted into the charge shallowly, it is not suitable for melting at higher voltage, and smelting at lower secondary voltage should be used. If higher secondary voltage is used for melting, heat loss will be large, and due to low silicon content, rejection may occur.
2. There are a large number of steel scraps in the furnace charge, and the melting reaction rate is high. The feeding rate should be adapted. Add frequently and sparingly so that there is no shortage of material in the furnace, especially in its core, to stabilize the electrode and reduce heat loss.
3. There are a large number of steel scraps in the charge, the crucible under the electrode is small, there are fewer cave-ins and large ignition, there is mainly a small ignition, and the surface of the material is evenly and quickly lowered. The material has good air permeability and is relatively soft. Do not punch the ventilation holes too often to prevent the electrode from oscillating. The number of calcinations should not be too large, only 1-2 times every 8 hours.
When smelting 45 ferrosilicon, the temperature at the mouth of the furnace is low, which makes it easy to operate.
4. The charge has strong conductivity, and the electrode is easy to lift. Therefore, the working end of the electrode should not be too long, so that the electrode does not rise to the upper limit and cause shutdown. Operators should work carefully.
5. There are more steel scraps in the charge, and the melting reaction consumes less heat. Therefore, the specific energy consumption of smelting 45 ferrosilicon is low and the output is high, which is about 80% more than smelting 75 ferrosilicon. Smelting 45 ferrosilicon requires five furnaces for every eight hours.