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    Electric furnace technical information(技术)
        

    Technical Parameters of Low Frequency 20 T Induction Melting Furnace

       The 20 T induction melting furnace is an energy-saving induction melting furnace. According to the difference of inverter resonance, it is divided into ordinary classic line 20 T parallel induction melting furnace and 20 T one-to-two induction melting furnace . The 20 T induction melting furnace is composed of a 12-pulse intermediate frequency power supply, It consists of two 20 T steel shell furnace bodies, a hydraulic tilting furnace, and a complete set of water cooling systems.

    1. Ordinary classic line 20 T parallel induction melting furnace

    One set of 20 T parallel induction melting furnace with a power of 10000 kw is equipped with two 20 T melting furnaces. Use two 5000KVA special rectifier transformers for 10000KW, 12-pulse intermediate frequency power supply.  

    Main technical parameter requirements of ordinary parallel 20T/10000KW induction melting furnace

    Serial number

    Term project  

    Reference number  

    Preparation Note  

    1

    Power incoming line voltage

    1050V , 50Hz 

    User grid voltage 35KV

    2

    Rated Capacity

    20T 

    10000KW power melting and heat preservation

    3

    rated power

    10000KW

    12-phase 24-pulse control system 

    4

    Rated intermediate frequency

    350 Hz 

     

    5

    Rated temperature

    1700°C

     

    6

    Melting rate

    About 10T/H

    Continuous use of melting furnace

    7

    Unit power consumption

    Melting about 550-600kwh/T    

    Continuous use of melting furnace

    8

    Power cooling circulating water consumption

    35T/H

    Continuous use of melting furnace

    Circulating water consumption of furnace cooling

    30T/H

    Continuous use of melting furnace

    9

    Hydraulic station capacity

    200 L 

     

    10

    Transformer model

    ZSS -6300 /10KV/1250x2  

    Dedicated rectifier transformer (for 6000KW)

    11

    Hydraulic medium

    No. 46 hydraulic oil

     

    12

    Water supply pressure

    0.2-0.3 MPa  

    To the position of the furnace port

    13

    Working pressure of hydraulic station

    15 MPa 

    Z height 18 MPa 

    14

    Inlet water temperature

    35°C

     

    15

    Outlet temperature

    55°C

     

     

     

     

     

    20T / 10000KW parallel induction melting furnace consisting of

    The composition of a set of 20T/10000KW parallel induction melting furnace

    Order No. 

    Name called     

    Model and remarks  

    Quantity

     

    1

    IF power supply cabinet

    10000KW with 20 T furnace

    1 set

     

    2

    Capacitor bank

     

     

     

    3

    Leaking furnace alarm device

     

     

     

    4

    Furnace body (including: oil cylinder, iron core, bracket, induction coil, etc. ) 

    20T melting furnace body

    2 sets

     

    5

    Crucible mold 

     

     

     

    6

    Water-cooled cable

    Water-cooled cable side outlet 

    2 sets

     

    7

    Hydraulic station system 

     

    1 set

     

    8

    Tilting furnace console

     

    1 set

     

    9

    Equipment technical drawings 

     

    1 set

     

    10

    Equipment instruction manual  

     

    1 set

     

    11

    Certificate of conformity and inspection report 

     

    1 set

     

    Remarks:

    1) Use 12-phase 24-pulse double rectification control system.

    2) The use of a fully enclosed cooling tower can improve the cooling effect of the system and the service life of the equipment, without the need to build a pool.

    Main components of 20T/10000KW parallel induction melting furnace

     1. Power supply cabinet:

    ⑴Main circuit breaker 

     

     Rectifier SCR 

     

    ⑶Inverter SCR 

     

    ⑷Main control board 

     

    ⑸Buttons , indicator lights, etc. 

     

    ⑹Resistance and capacitance to protect thyristor 

     

     Copper 

    2. Electric heating capacitor

     

    3. Stove

     

     

    ⑵Silicon steel sheet 

     

    ⑶Hydraulic cylinder 

    4. Hydraulic system

    ⑴Hydraulic components 

     

    ⑵Oil pump 

     

     Motor 

    5. Transformer (optional)

     

    6. Waterway system

    (1) FBT closed cooling tower 

     

    (2) Water pipes and hoses

     

    (3) Pipeline valves and others

    2. Progressive line super fast energy-saving series line

    20 is T one with two induction melting furnace is 20 is T series inverter electric furnace, with two medium frequency induction melting furnace at the same time can also be an induction melting furnace smelting, the other an induction melting furnace may be required to control the casting temperature Or keep warm. (It is called a 20 T induction melting furnace with one for two ). The user can choose according to the needs. 

    Our company designed a set of 12000kw intermediate frequency power supply with two 20 T smelting furnaces. Two 6300KVA dedicated 12-pulse rectifier transformers are used for 12000KW intermediate frequency power supply, and the power supply is a 24-pulse intermediate frequency power supply.

    Main technical parameter configuration of 20 T one to two induction melting furnace 

    project            

    unit

    data

    Electric furnace parameters  

    T

    20t

    Rated Capacity

    t

    20

    Z large capacity

    t

    twenty one

    Z high working temperature

    °C

    1800

    Transformer capacity

    KVA

    Two 6300KVA units in parallel

    Transformer primary voltage

    KV

    10

    Transformer secondary voltage

    V

    1250

    Rated power of intermediate frequency power supply

    KW

    12000kw melting furnace power 10000kw, holding furnace 2000kw, power adjustable 

    Coil voltage

    V

    3000

    Rated working frequency

    Hz

    300

    Power conversion efficiency  

    %

    96

    Startup success rate

    %

    100

    Comprehensive parameters

     

     

    Equipment power factor

     

    ≥0.96

    Melting rate (heating up to 1800 ℃) 

    t/h

    15

    Melting power consumption (heating up to 1800 ℃) 

    KW.h/t

    550

    Working noise

    db

    ≤75

    Hydraulic system

     

     

    Hydraulic station capacity

    L

    800

    Work pressure

    MPa

    15

    Hydraulic medium

     

    Hydraulic oil

    Cooling water system

     

     

    flow

    M3/h

    150

    Water supply pressure  

    MPa

    0.2~0.3

    Inlet water temperature

    °C

    5~35

    Outlet temperature

    °C

    35~55

    Leaking furnace alarm device

     

    20 T one to two induction melting furnace rectifier transformer

    The rectifier transformer is used to reduce the primary high voltage to the input voltage suitable for the intermediate frequency power supply. It adopts a special high impedance oil-immersed self-cooling rectifier transformer, and the S11 type high-efficiency three-phase oil-immersed distribution transformer 6300KVA

        This kind of rectifier transformer generally adopts Y/d11, Y0 connection group mode, and the secondary output is two groups, one of which is Y-connected, and the other is d11-connected, so that the phases of the two sets of output will be A difference of 30° from each other forms a 12-pulse rectification method. Compared with six-pulse rectification, this rectification method can effectively suppress the 5th and 7th harmonics and reduce the interference of harmonic components to the power grid. Therefore, this rectifier transformer is used in large electric furnaces.

    Parameters of 12-pulse rectifier power transformer:

    Electric furnace capacity (t)

    Intermediate frequency power (KW)

    Transformer capacity (KVA)

    Voltage combination

    Connection group label

    Impedance voltage (%)

    Primary side (KV)

    Secondary side (V)

    20

    6000

    6300

    10

    1250

    Y/d11, Y0

    6~8

    Note: There should be an off-load voltage regulating switch on the high-voltage side of the transformer, and the voltage should be adjusted in five levels of -10%, -5%, 0, +5%, and +10%.

    20 T one to two induction melting furnace water cooling device

    It is recommended to use Fbt-150 closed circulating cooling tower for power supply, and Fbt-200 closed circulating cooling tower for electric furnace, which can save a lot of production space and floor space.

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    Tel:18037961302 Sales hot line ( 24 hours service): 18037961302
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