Ladle refining furnace belongs to the secondary refining equipment, which typically to be used follows the primary melting furnace. Its main function is to remove sulfur, impurity from molten steel and adjust chemical components, thereby, improve quality of molten steel. LF is mainly used in high-quality carbon steel, stainless steel, manganese steel and other metal smelting.

1. LF-15t Ladle Refining Furnace
1. Application
Ladle refining furnace belongs to the secondary refining equipment, which typically
to be used follows the primary melting furnace. Its main function is to remove sulfur,
impurity from molten steel and adjust chemical components, thereby, improve quality
of molten steel. LF is mainly used in high-quality carbon steel, stainless steel,
manganese steel and other metal smelting.
2. Equipment Performance
No. Item Unit Parameters Remark
1 Rated refining capacity T 15
2 Transformer rated power KVA 4000
3 Tap to tap time min 45
4 Molten steel heating rate °C /min ≥ 4
5 Power consumption KWh/ t ≤55KWh/t

2. 6 Electrode consumption /KWh ≤ 0.6-0.7kg
3. Component Parameters
No. Item unit parameters Remark
1
Transformer
Rated power KVA 4000 Overload 20%
Primary voltage KV 20
Secondary voltage V 200-185-135V Level 5
Secondary current A 12483
Voltage regulating OFF Load
cooling type OFWF
2
ladle
Max diameter of ladle mm Φ2300
Spare height mm 500
3
lager current
Impedance unbalance
factor
% ≤5
Theoretical value
resistance
0.65+J2.5mΩ
4
Electrode system
Electrode diameter mm Φ350 Graphite electrode
Electrode distribution
circle
mm Φ600
Lifting speed m/min up/ down：4/3
Electrode lifting
height
mm 2000
Drive mode of lifting Hydraulic control
Electrode arm
structural
Single arm copper
clad
5
Gantry and roof Lifting mechanism
Roof lifting type
Hydraulic
cylinder-Chain type
Roof lifting height mm 400
6
Roof
Roof type
Tube type water
cooling roof
7
Ladle car
Weight of load T 50
Drive mode Motor Frequency control
Speed m 2-20
Positioning accuracy mm ±10
8 Circulating water cooling system

3. Flow rate m3/h 140
Inlet pressure MPa 0.4～0.6
Inlet temperature ℃ ＜35
Outlet temperature ℃ ＜55
9
Hydraulic station
Rated pressure MPa 17.5
Working pressure MPa 10
Motor Kw 22
2 stands（one for
use and one for
standby）
Accumulator 100Lx2
Hydraulic medium Hydraulic oil
Electrode lift
proportioner valve
Inlet proportional
valve
10
Centralized lubrication
Tank volume L 30
Max working pressure MPa 21
Lubricating medium
High temperature
resistant dry grease
11
Argon system
Inlet pressure MPa 1.2-1.6
Working pressure MPa 0.3-0.8
Purity 99%
12
HV system
Disconnecting switch GN2
Voltage transformer JDZ
High voltage vacuum
circuit breaker
VS1
Current transformer LZJ
Zinc oxide arrester SDB
Main loop metering
and protect system
13
L.V control system
GGD type L.V switch
cabinet
GGD type Rettale
L.V electrical
components
DELIXI
PLC Simens
inverter Simens
4. Strengths of ZL Ladle Refining Furnace

4. 4.1 Low power consumption
ZL’s large current system made of pure copper as conductive medium, the whole
circuit with less resistance. Electrode arm shaped as copper-clad box type, resistance
and heat can be reduced efficiently. Reasonable arrange of all conductive systems to
minimize the resistance of every circuit.
4.2 Optimized structure, Low failure rate, limited investment
Clamping mechanism of the three electrodes is mounted in three separated small box,
which installed on one electrode arm and supported by one column, thereby,
compared to the traditional three electrodes and three columns, ZL’s electrode system
is easier, limited investment, lower fault rate.
4.3 Safety & Stability
Full set of hydraulic driving system equipped with accumulator to ensure stability of
facilities in the operation process. Whist, equipments can go on the motion when there
any emergency accidents happen.
4.4 High flexibility & Maximum simplicity of operation
HMI used in electrical automation control, interface simulates the real form of furnace,
which make the operation more convenient. Mixing feedstock, charging feedstock,
melting, tapping all the commands can be implemented by computer.
4.5 Coordinated with ZL’s patented multi-pouring systems, per batch liquid steel
pouring out more times is available, which benefits foundries requirements of
different size castings.
ZL’s patented technology <Multi-pouring Mechanism>, is a kind of rod utilized to
block the hole on ladle bottom, which can realize pouring through the bottom of ladle,
make the pouring process easier, safer.
Advantages of this kind mechanism: 1.Make one batch liquid steel with multiple
pouring come true, which casting times is far more than sliding nozzle does. 2. The

5. hot rod is mounted before pouring. Compared to cold rod, which will not be melted
with liquid steel, and protect the plug rod from meltdown process, thereby, steel
leakage can be avoided. 3. Implementation of hot rod is convenient, pressing down
hand shank the pouring starts, otherwise, the pouring ends.
4.6 Automatic temperature sampling system is available, so that the operation is more
safe and convenient.
4.7 ZL’s furnaces are equipped with a variety of dust removal systems, can be based
on environmental requirements of different countries support different forms of dust
removal equipments.
5. Equipment Components
5.1 Furnace body
Furnace shell, Furnace door mechanism, Tapping spout mechanism
5.2 Furnace Roof
Water-cooling ring, Refractory center cover (To be made by buyer according to
drawings of seller)
5.3 Lifting furnace roof
Lifting mechanism
（hydraulic cylinder，
transmission chain，
chain wheel，
etc.）
(support
of Γ form)
5.4 Swiveling mechanism
Arc frame, foundation base, hydraulic cylinder
5.5 Electrode cross arm & lifting mechanism
Bracket of electrode, Clamping device of electrode, Lifting mechanism.
5.6 Large-current system
Compensator, Water-cooled cables, Stainless steel support, Water-cooled conductive
copper tube
5.7 Water-cooling system
Water inlet distributor, water return tank, pressure gauge, thermometer, valve
5.8 Hydraulic system
Motor, pump, Oil filter, Oil tank, Control valve，Accumulator

6. 5.9 HV. Power supply system
Disconnecting switch, Voltage transformer, Vacuum breaker, Current transformer,
Zinc-oxide arrester, etc.
5.10 Furnace transformer
5.11 L.V system
L.V. power distribution cabinet, PLC cabinet, Main operation desk, Operation desk in
front of furnace, Hydraulic operation box, Detect instrument and transducer, limited
switch,
5.12 Automation control system
PLC SIMENS PLC
6. Self-preparation Components by User
6.1 Refractory
6.2 Graphite electrode
6.3 The foundation construction, basic pre-embedded parts
6.4 Rail(Track) and fasteners
6.5 Hydraulic oil
6.6 Thermometer of liquid steel, Sampling device
6.7 HV. Cable used from H.V. cabinet to transformer
7. Quality guarantee
One year since equipment debugging was done
Looking for LF ladle refining furnace, please mail at marketing2@hanrm.com,
we will make a perfect solution for you.
More Articles You May Be Interested in:
Hot Rolling VS Cold Rolling
Electric Arc Furnace
Processing Cost of Cold Rolling Strip
Introduction of EAF(Electric Arc Furnace)
Hot rolling
On the Distance between the Rolling Mills

7. How to Determine the Steel Temperature by Naked Eye
Second Hand Wire Rod Mill for Sale
Roller FAQs
An Effective Way to Reduce Roll Consumption
On the Application of Cardan Shaft in Hot Strip Steel Rolling
High-Speed Wire Rod Steel Production Process
Roughing Rolling Mill Machine
On the Advantage and Disadvantage of Electric Arc Furnace and Induction Furnace
The Advantage of Induction Furnace
Indian and Sri Lankan Customers Pay A Visit To Hani Steel and Discuss Finishing
Rolling Mill Line Solution
The Difference Between Hot Rolled Steel and Cold Rolled Steel
The Advantages and Disadvantages of Hot Rolling
Introduction of Our Factory
Analysis of Five Common Failures in Steel Rolling
Bar Rolling Process and Equipment Selection
The Export Delivery of High-Speed Wire Rod Production Line to Iran
What are the Main Ancillary Equipment for Rolling Mills?
The Production Process of the Wire Rod
What are the Categories of Steel Products?
50,000-300,000 tons of Rebar and Wire Rod Production Line
Advantages of Multi-roll Rolling Mill
VibSCAN Online Monitoring System Solution for Han Steel
Technical Requirements of Rolls and Reasons for Broken Rolls

8. DC Electric Arc furnace vs DC Submerged Arc Furnace
How to Choose Cardan Shaft?
"Turn-key" TMT Rolling Mill Production Project under Construction
Presentation on Continuous Casting Machine
Electric Arc Furnace VS Submerged Arc Furnace