50T medium frequency steel shell induction melting furnace technical specification and complete set range
I Technical program and specification
This program is recommended that whole set equipment of the furnace shall be equipped with two furnace bodies user can be readjusted by practical needs.
1.1 Technical program
The main equipment of this program is included 2 setso of 13000KVA rectification
Transformer, 4 low voltage control cabinet, 4 power supply cabinet, total power is 26000KW. 2 sets 50t MF induction furnace, 1 hydraulic station (double motor double pump, type electromotion), 1 cooling water device, and other auxiliary device. The electric system diagram is as follows:
   
The output of MF power supply is changed by furnace-changing switch, for the purpose of maintenance and alternative melting.

1.2 Technical parameter

Name  Unit  Parameter  Remark
Rated capacity  t  50  
Max load capacity  t  60  
Rated power  kw  26000  
Working frequency  Hz  150  
Melting rate  t/h  30-35  1600C
Power consumption  kw. H/t     560-590  1600C
Inductor inner diameter  mm  Φ2220  
Height of inductor  mm  3000  
Rated temperature of the working  C  1600  
Incoming voltage  v  1000  
Incoming current  A  4050  
Electric rectificate mode    24 pulse  
Voltage of inductor  V  3400  Double voltage
Cooling water of the furnace  Pressure of incoming water  Mpa  0.25~0.3  
 Temperature of incoming water  C  ≤ 5~35  
 Temperature of outlet water  C  ≤ 55  
 Flow rate ( furnace body)  t/h  460  Single furnace (230)
Flow rate ( power source)  t/h  160  
Water temperature rise of power source  C  10  
Cooling water pressure for power source  Mpa  0.1~0.2  
Hydraulic system  Working pressure  Mpa  12  Doublemotor,
Double pump
 Flow rate  L/min  190  
 Hydraulic medium    Antiwear hydraulic oil
 Summer: N68
Winter: N46
 Diameter of the hydraulic cylinder  mm  Φ320  
Capacity of the transformer  KVA  13000× 2sets  ( Reference )
Primary voltage  KV  10 or 35  
Secondary voltage  V  1000  
Connection way    Extension triangle phase shift ± 7.5
Namely: D(+7.5)dyn
D(-7.5)dyn  
Impedance voltage    8~9%  
Phase number    3 phase input, 6 phase output  
Pressure adjustment way    No excitation  
Cooling way    Strong grease  
II Products standard and Operating conditions
2.1 Products standard:
GB10067.3-1988 'Basic specifications for electroheat installations--Induction electroheat installations'
GB10067.1-1988 'Basic specifications for electroheat installations_General'
GB10066.3-2004 'Test methods for electroheat installations--Coreless induction furnaces'
GB5959.1-2005 'Safety in electroheat installations-- General requirements'
GB5959.3-1988 'Safety in electroheat installations--Particular requirements for induction and conduction heating installations and induction melting installations'
2.2 Operating conditions
2.2.1 Cooling water conditions
PH: 7-8.5
Hardness: <10 degrees(Each degree that 1L water contains less than 10mg calcium oxide)
Total solid content: <250mg/L
Water resistance: (Power)>100KΩ-cm
(Furnace)>2KΩ-cm

2.2.2 Power supply conditions
A. Three-phase voltage unbalancedness <5%
B. Voltage fluctuations <± 5%
C. Voltage waveform distortion factor <10%
No.
 
Description
 
Unit
 Qty  Single Wt (t)  Total Wt (t)
1  50T Medium-frequency
Induction furnace  set  2  65  130
2  Low voltage power cabinet  set  4  2.5  10
3  Power cabinet  set  4  4.5  18
4  Compensate capacitor banks  set  2  7  14
5  Tilting hydraulic system  set  1  3  3
6  Hydraulic electric control cabinet  set  1  1  1
7  Furnace changing switch  set  1  0.5  0.5
8  Cooling water cable for furnace shell  pc  32    
9  Connect cable from power cabinet to capacitor cabinet  pc  8    
10  Connect cable from capacitor cabinet to Furnace changing switch  pc  12    
11  Crucible mould  pc  1    
12  Hydraulic pipeΦ28 (including connector)  pc  1    
13  Temperature /pressure alarm system  set  1    
14  Technical data  copy  1