15t Ladle Refining Furnace
Overview:
Features of ladle refining furnace: electric arc heating, temperature measuring and sampling, bottom argon blow stirring, contents microscale adjustment, wires feeding, control production steps of steel making and casting.
2.2 Main function of the equipment
▲ Heating by Arc to raise the temperature of molten steel under normal atmosphere, temperature measuring and sampling by manual.
▲ Bottom bubbling by Argon, to achieve the temperature and composition even.
▲ It can be slightly adjust the quantity of alloy, to control accurately and meet the final chemical compositions as required.
▲ With the wire feeder, making desulphuration, deoxidizing of the molten steel, to change the form and distribution of the inclusions and control the alloying element accurately, meanwhile can raise the recovery up of the alloy, minimize the temperature drop and minimize the environmental pollution.
▲ As a buffer to adjust the melting and casting time.
2.3 Main Technical Parameter
SN Equipment Unit Data Remark
1 Rated capacity t 15
Max. capacity t 18
Free board of ladle mm 500 15t liquid steel
Distance between trunnions mm 2800
2 Ladle car Traveling speed m/min 2-20
Driven mode Mechanical VVVF driven
Positioning accuracy mm ±10
3 Electrode diameter mm Φ250 HP
Electrode pitch circle mm Φ460
Electrode lifting stroke mm 1600
Traveling speed (up/down) m/min 4 / 3 auto
6 / 4 man
Heating rate ºC/min ≥4
4 Hydraulic Working pressure MPa 12
Hydraulic medium 46# Mineral oil
5 Roof lifting stroke mm 300
6 Working pressure of argon MPa 0.3-0.8 Max. 1.6MPa
Argon consumption NL/min 50-200
7 Cooling water working pressure MPa 0.4
Inlet temperature ºC <32
Outlet temperature ºC <55
Circulation flow rate m3/h 80
8 Compressed air working pressure MPa 0.6
Consumption L/min 100
9 Rated capacity of furnace transformer kVA 3000 Over load 20%
Primary voltage kV 20
Secondary voltage V 160-110
Secondary current A 10825
Cooling mode OFWF
2.4 Scope of Supply
SN Item Qty Remark
1 Ladle car 1 set
2 Water cooled roof 1 set Tubular
3 Roof lifting mechanism 1 set
4 Guide rollers & frame 1 set
5 Electrode lifting mechanism 1 set
6 Cooling water device 1 set
7 Manual temp. measuring & sampling device 1 set
8 Lubrication system 1 set
9 Compressed air device 1 set
10 Argon bubbling device 1 set
11 Hydraulic power pack 1 set Proportional valve & pump make: Parker
12 Short net 1 set
13 H.V. 20kV switchboard 1 set
14 L.V. Control system 1 set
15 PLC & HMI system 1 set Siemens S7-300
16 3MVA furnace transformer c/w oil/water cooler 1 set
Supplied by the Buyer:
1) Installation and installation material, furnace refractory lining, hydraulic medium, lubrication medium and cleaning medium, graphite electrodes;
2) Civil works and design (Seller provides furnace foundation drawings and civil work requirements), embedded furnace foundation parts;
3) Water supply and gas supply main inlet are laid to Seller’s equipment connection point, H.V. incoming line is connected to seller’s H.V. switchboard and transformer terminals, L.V. supply lines are connect to seller’s L.V. power distribution panel.
3. Cooling water quality
Industrial clean water (norm GB/T10067.1-1988)
PH 6～8
Suspended solids ＜20mg/L
Alkalinity ＜60mg/L
Chlorides average＜60mg/L
maximum＜220mg/L
Sulphates ＜100mg/L
Iron ＜2mg/L
Soluble solids ＜300mg/L
Soluble SiO2 ＜6mg/L
Electrical conductivity 500μm/cm
Water hardness ＜10 degree
4. Quotation conditions
4.1 All present and/or future taxes and duties related to the execution of this Contract, income tax levied on the Contractor’s personnel, tax on foreign contractor’s business operated outside the Seller’s in accordance with existing laws, shall be borne by the Owner, In the Seller’s country is borne by the Seller;
4.2 The Seller will dispatch engineers(5 engineers: mechanical, electrical, PLC, transformer, H.V., etc) to supervise furnace installation and commissioning. Round trip air ticket, local traffic transportation and accommodation cost are borne by the Buyer. The Supervision Fee is $80USD for 1 person per day;
4.3 Seller’s engineers will train Buyer’s employees about furnace operation and maintenance in job site.
