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Blast furnace

Metallurgical industry is a high energy consuming industry. Numbers of high-power motors working under fixed speed waste a lot of Power. Using VFD can solve the soft start problems, save the energy and improve the process.

The figure below shows the system diagram of the entire blast furnace. The blowers used in modern large and medium sized blast furnace systems mostly use turbine-driven centrifugal type and axial flow type. The reliability of the blast furnace blower is related to the entire blast furnace production. Under normal circumstances, if the blower unexpectedly stopped, it will lead to serious safety production accidents and economic loss may reach to hundreds of thousands, even more than one million CNY.
  • Abstract
  • Configurations
  • Applications

Metallurgical industry is a high energy consuming industry. Numbers of high-power motors working under fixed speed waste a lot of Power. Using VFD can solve the soft start problems, save the energy and improve the process.

The figure below shows the system diagram of the entire blast furnace. The blowers used in modern large and medium sized blast furnace systems mostly use turbine-driven centrifugal type and axial flow type. The reliability of the blast furnace blower is related to the entire blast furnace production. Under normal circumstances, if the blower unexpectedly stopped, it will lead to serious safety production accidents and economic loss may reach to hundreds of thousands, even more than one million CNY.
 
 

Blower is the most powerful load in the whole blast furnace system, and its power consumption is huge. At present, many of them use the water resistance cabinet to start and the damper to adjust the operation, and the energy waste is very serious. In the traditional starting mode, other high-power loads must be shut down before starting to ensure that the grid capacity can withstand the starting surge current. Due to continuous expansion of the steel mill blast furnace, the reserves of the grid incoming is limited, so the starting inrush current must be within a reasonable range.

 

NANCAL NC HVVF series medium voltage AC drives, based on the improved motor full-speed flux observer vector sensorless vector control technology to complete the soft start and synchronous working with grid, and make sure that the starting inrush current is within 1 times of the rated current to solve the problem of the impact caused by the blast furnace starting on the grid, and eliminate voltage fluctuations and prolong the service life of the motor.
Motor parameters
Model YGF1000-4
 
 
 Rated voltage
 
 
 10000V
 
 
Rated Power 10000kW
 
 
 Rated current
 
 
 658A
 
 
Speed 1488r/min
 
 
 Power factor
 
 
 0.907
 
 
Efficiency 96.8%
 
 
 
 
VFD parameters
Model：NC HVVF 10/10-10000
Input voltage：10kV
Output voltage：10kV
Output capacity：10000kW
 
 

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