60t Ladle refining furnace
LF-60t Ladle Refining Furnace
1. Equipment descriptions and technical parameters
LF-60t refining furnace consists of mechanical, hydraulic, electrical, basic automation and HMI operation station and so on. LF-60t ladle furnace is external refining device of the steel-making workshop. It accepts first refining molten steel at the position of ladle suspended, and then conducts and finalizes desulphurization, heating, argon stirring, wire feeding composition adjustment, sampling and temperature measuring. At last, ladle car is located at the position of ladle suspended, ladle is lifted by workshop crane, and qualified molten steel is provided to the continuous casting machine or ingot mould.
Serial number | Name | Unit | Value | Remark | ||
1 | Quantity of processed molten steel | t | 60 | |||
2 | Ladle | |||||
Inner diameter of upper mouth | mm | ∮2900 | Interim | |||
Height of free space | mm | 500 | 55t molten steel | |||
3 | Heating device | |||||
Electrode diameter | mm | ∮350 | HP graphite diameter | |||
Diameter of electrode core | mm | ∮650 | ||||
Electrode travel | mm | 2400 | ||||
Form of arm | Three phrase conductive arm | |||||
Electrode lifting speed | M/min | 5/4 | ||||
Electrode control mode | Proportion valve | Manual /automatic (computer) | ||||
4 | Transformer | |||||
Rating capacity | KVA | 11000 | Allowable overload 20% | |||
Primary voltage | KV | 35 | ||||
Secondary voltage | V | 245~215~145 | 11 level | |||
Secondary current | KA | 29.538 | ||||
Voltage step mode | Loaded delectric voltage regulation | |||||
5 | Current bus | |||||
Form | New energy-saving | |||||
Impendence of current bus | mΩ | 0.61+j2.49 mΩ | ||||
Imbalance of three phrase impendence | % | ≤5 | ||||
6 | Temperature lifting speed of molten steel | ℃/min | 3.8~4.5 | |||
7 | Roof | |||||
Lifting height | mm | 400 | ||||
Lifting mode | Hydraulic vat-chain | |||||
8 | Smoke exhausting mode | Collecting smoke from electrode hole Smoke ejecting mouth detaches flange mouth | ||||
Smoke quantity at fume hood | Nm3/h | ~14000~~21000 | ||||
Operating temperature | ℃ | ~400 | （air contained） | |||
9 | Ladle car | |||||
Maximal load | t | ~120 | ||||
Speed | m/min | 2-20 | ||||
Driving mode | Electromotor--speed-down motor Frequency conversion speed regulation | |||||
10 | Hydraulic system | |||||
Working pressure | Mpa | 12 | ||||
Working media | Water-glycol | |||||
11 | Cooling water system | |||||
Pressure (in) | Mpa | ≥0.3~0.5 | ||||
Temperature (in) | ℃ | ≤35 | ||||
Temperature (out) | ℃ | ＜55 | ||||
Consumption | ||||||
Equipment cooling water consumption | t/h | 220 | (Roof + other parts) | |||
Transformer | t/h | 30 | ||||
Total | t/h | ~250 | ||||
Water quality requirement | Industrial water | Execution according corresponding criterion (requirement of electric arc furnace) | ||||
12 | Argon system | |||||
Pressure | Mpa | 0.3-0.8 | <1.6Mpa | |||
Consumption | N1/min | (50～300) | ||||
Purity | % | 99.99 | ||||
13 | Compressed air system Working pressure Consumption | Mpa L /min | 0.6 ～200 | |||
Performance guarantee
Serial number | Item | Unite | Guaranteed value | Remark |
1 | Test of heating | ℃/min | 3.8~4.5 | |
2 | Electrode consumption | Kg/t | 0.5 | |
3 | Electricity consumption of refining | Kwh/t | 45-60 | △t≤60℃ |
４ | Refining cycle | min | 45~50 | |
５ | Precision of temperature control | ℃ | ±５ | |
６ | Life of ladle | Furnace time | ≥40 | |
７ | Life of roof | Furnace time | ≥3000 |
