Today we will discuss with you about the energy loss of industrial furnaces during operation.
Such as our giant electric induction furnace. Using the induction principle of a transformer, when an electrical conductor is placed in a fluctuating magnetic field, a voltage is induced in the conductor.
In a crucible furnace, this voltage creates strong eddy currents that, due to the electrical resistance of the material, cause the material to be heated and eventually melted.
In the process of heating steel, a large amount of electricity is required. In addition to the theoretical energy required to produce steel, energy is also required to compensate for losses that occur when producing steel. Energy loss increases specific energy consumption and reduces furnace efficiency.
Losses in steel production
Furnace Coil Loss
Capacitor Bank Loss
Primary side transformer losses.
Heat loss is the main loss and contributes the most to the energy loss. The main heat loss of induction furnace:
Radiation loss from furnace top
Conduction loss of refractory lining
Heat Loss in Coil Cooling Water
Heat carried by removed slag
Heat carried by the gas exhausted from the furnace top
In the process of generating heat, the furnace continuously loses heat to the cooling water and to radiation from the outer casing and exposed metal surfaces on the top. Electric energy needs to be consumed to replace these heat losses. Therefore, the longer the heating time, the higher the energy consumption and the lower the efficiency of the furnace.
Factors that affect the power consumption in the furnace include
Dirt with scrap into the furnace
Low bulk density of waste
Not using full power for melting
Excessive slag formation
Produces excessive smoke and emissions
Excessive loss of metal due to spills and splashes
Because longer production cycles mean higher heat losses due to radiation and conduction
Metal loss from metal charge depends on the physical size of the part and its mass, but is typically less than 5%, with a significant portion of the loss due to spills and splashes during deslagging and pouring operations.
One factor that has the greatest impact on energy consumption is the level of furnace utilization. Higher utilization means efficient production cycles.
This is what we share today, welcome to pay attention to Luoyang Judian to learn more about melting furnaces.