Reheating Furnace for Steel Rolling Mill Line
Reheating furnace of rolling mill production line is a kind of device (industrial furnace) that heats material or workpiece (usually metal) to forging temperature in metallurgical industry.
Structure and composition
According to the distribution of furnace temperature, the furnace is divided into preheating section, heating section and heating section along the length direction.
The lower temperature of the feed end is the preheating section, whose function is to use the heat of the furnace gas to improve the thermal efficiency of the furnace.
The heating part is the main heating part. The gas temperature in the furnace is high, which is convenient for rapid heating.
The soaking section is located at the discharge end, and the difference between the temperature of furnace gas and that of metal material is very small, so as to ensure that the temperature of furnace charge section is uniform.
Technical parameters:
Rectifier transformer:
Capacity: 4000kva
Model: zsf-4000-10 / 0.78
Primary voltage: 10 (± 5%) kV,
Secondary voltage: 780v
Cooling mode: ONAF
Short circuit impedance: 7-8%.
Medium frequency heater:
Mode: kgps-3600 / 0.25
Rated power: 3600kw input voltage: ~ 780v, frequency: 50Hz
Output voltage: ~ 1700V, frequency: 250Hz
Inner diameter of induction coil 250 × 250mm
Cooling water flow: 80m3 / h
Water inlet temperature: ≤ 38 ° C
Cooling water pressure: 0.150.25mpa
Inductor:
Input power: 3600kw
Input voltage: 1700V
Input frequency: 250Hz
Inductance inner diameter: 250 × 250mm, inner cavity: 200mm × 200mm
Cooling water flow: 120m3 / h
Water inlet temperature: ≤ 38 ° C
Water inlet pressure: 0.15-0.25mpa
