Ladle crane is the main lifting and transportation equipment in the smelting workshop of the steel plant, which is used for the transfer of liquid metal, pouring and iron mixing in the smelting process.
Metallurgical Environment
Metallurgical industry cranes are often used in special environments, the operating environment of the crane in the metallurgical industry is mainly characterized by the following:
- Dusty workplace, smelting, casting, heat treatment and other processes can hardly be avoided will produce high-temperature dust, which floats in the air, will be attached to the various surfaces of the crane, and even affect the normal operation of electrical equipment, so the need for specialized metallurgical cranes.
- Higher ambient temperatures, the temperature of molten metal is usually more than 1500 degrees Celsius degrees, the average room temperature in the plant can reach 40-60 degrees Celsius, the molten metal on the spreader's radiation temperature can reach up to 300 degrees Celsius.
- Air humidity, air will be mixed with corrosive gases, smelting, casting, heat treatment process, will produce some water vapor, but also produce some corrosive gases, resulting in high humidity and high corrosive air environment, this environment will accelerate the corrosion of the metal structure, the crane is very harmful.
Comprehensive these special working environment, the metallurgical industry cranes play a very important role, can well avoid the above special environment to the crane to bring the impact of the crane to ensure that the lifting work in special environments can be carried out smoothly.
Metallurgical Foundry Ladle Crane Features:
- Driver's room, electrical room are fully insulated structure, and the room is equipped with cooling equipment (mostly industrial chillers) to ensure the normal operation of the operator and electrical equipment.
- The wire rope adopts high temperature resistant steel core wire rope (metal strand core or metal rope core);
- The hook group or the pulley group on the spreader and the fixed pulley group on the trolley are all fully closed structure to adapt to the operation under high dust environment, effectively extend the service life of the parts and reduce the after-sales rate.
- The hoisting drum is welded drum.
- Pulleys are rolled pulleys.
- Electrical cables are high temperature resistant cables.
- For large metallurgical cranes, if the motor capacity of the single-agency drag is more than 400KW, or the total capacity is more than 500KW, it is recommended to use 50HZ, 3000V power supply.
- Insulation class: H class.Protection grade: IP54;Working environment temperature: -10℃-50 ℃.
- 125 tons above the big car running mechanism and the main electrical equipment are installed in the main girder
Types of Ladle Crane
YZS Four Beam Ladle Crane
- Tonnage: more than 125 tons
- Spreader: double lifting point gantry hook
- Structure: four girders and double trolleys
Adopting main and vice double trolley, four girders and four rails structure, it is mainly composed of bridge frame, main trolley, vice trolley, hook beam, big car operation and electric part, the main trolley runs on the main girder rail on the outside of the bridge frame, and the vice trolley runs on the vice girder rail on the inside of the bridge frame, and the main trolley fetching device is the hook beam of fixed spacing, which is used to hoist the ladle of steel, and the vice trolley traverses the operation under the main trolley, and the fetching device is a hook, which is used to cooperate with the main hook to dump steel, steel slag and other auxiliary lifting operations. The secondary trolley traverses under the main trolley, and the pick-up device is a hook, which is used in conjunction with the main hook to dump steel, slag and other auxiliary lifting operations.
| Capacity(t) | Span(m) | Lifting height(m) | Lifting speed(m/min) | Working duty | ||
|---|---|---|---|---|---|---|
| Main hook | Auxiliary hook | Main hook | Auxiliary hook | |||
| 125/32 | 19 | 24 | 26 | 7.6 | 9.7 | A7 |
| 140/32 | 19 | 22 | 24 | 7.8 | 9.7 | A7 |
| 160/32 | 27 | 25 | 26 | 9.8 | 12 | A7 |
| 180/50 | 28.5 | 27 | 29 | 7.5 | 10 | A7 |
| 200/50 | 28 | 26 | 26 | 6 | 10 | A7 |
| 225/65 | 27 | 32 | 34 | 11 | 11 | A7 |
| 240/80 | 22 | 25 | 27 | 7 | 9.6 | A7 |
| 280/80 | 22 | 29 | 29 | 12 | 10 | A7 |
| 320/80 | 24.5 | 28 | 32 | 7.5 | 10 | A7 |
Here are detailed parameters: yzs-four-beam-ladle-crane-parametric.pdf
YZ Double Girder Ladle Crane
- Tonnage: 75 tons-125 tons
- Spreader: double lifting point gantry hook
- Structure: double girder single trolley
Adopting double girder and single trolley structure, it mainly consists of bridge, trolley, hook beam, trolley operation and electrical parts. Double lifting point gantry hook requires synchronized operation of double lifting mechanism, the main hook fetching device is the hook beam with fixed spacing, which is used to lift steel ladle, and the secondary hook is used to cooperate with the main hook to dump steel, steel slag and other auxiliary lifting operations.
| Capacity(t) | Span(m) | Lifting height(m) | Lifting speed(m/min) | Working duty | ||
|---|---|---|---|---|---|---|
| Main hook | Auxiliary hook | Main hook | Auxiliary hook | |||
| 75/20 | 13.5-31.5 | 22 | 24 | 6.1 | 9.7 | A7 |
| 100/32 | 19-25 | 18-25 | 20-27 | 6.8-8.6 | 9.5-12 | A7 |
| 125/32 | 19-22 | 20-24 | 22-26 | 7.6-9.5 | 9.5-12 | A7 |
Here are detailed parameters: yz-double-girder-ladle-crane-parametric.pdf
YZ Hook type Ladle Crane
- Tonnage: 5 tons-74 tons
- Spreader: single lifting point gantry hook
- Structure: double girder and single trolley
It consists of box-type bridge frame, lifting trolley, big trolley running mechanism and electric control system. Single lifting point spreader only need a set of lifting mechanism, the main hook to pick up lifting ladle, can be equipped with a secondary hook used with the main hook in order to dump steel, steel slag and other auxiliary lifting operations, but also lifting small ladle, manually dumping steel.
| Capacity(t) | Span(m) | Lifting height(m) | Lifting speed(m/min) | Total weight(t) | ||
|---|---|---|---|---|---|---|
| Main hook | Auxiliary hook | Main hook | Auxiliary hook | |||
| 5 | 10.5-31.5 | 16 | 15.5 | 14-33.7 | ||
| 10 | 10.5-31.5 | 16 | 10.4 | 16.2-36.67 | ||
| 16/3.2 | 10.5-31.5 | 16 | 18 | 10.7 | 14.6 | 21.5-44.02 |
| 20/5 | 10.5-31.5 | 12 | 14 | 9.8 | 15.5 | 22.8-46.85 |
| 32/5 | 10.5-31.5 | 16 | 18 | 7.8 | 15.5 | 30.6-58.2 |
| 50/10 | 13.5-31.5 | 12 | 16 | 7.8 | 10.4 | 39-73.8 |
| 74/20 | 13.5-31.5 | 22 | 24 | 6.1 | 9.7 | 68.72-108 |
Here are detailed parameters: yz-hook-type-ladle-crane-parametric.pdf
LDY Metallurgical Electric Single Girder overhead crane
- Tonnage: below 16 tons
- Spreader: Hook
- Structure: single girder with metallurgical hoist
It is mainly used for lifting molten metal in small steel mills and sand turning workshops, and consists of box-type bridge frame, metallurgical hoist, trolley running mechanism and electric control system. Electric hoist is used as lifting mechanism. The working level of the electric hoist should not be lower than M6. In addition to a working brake, a safety brake should be provided on the low-speed stage of the electric hoist, which can reliably support the rated load to prevent accidents when the working brake fails or the transmission parts break. The bottom of the main beam is treated with special heat insulation.
| Capacity(t) | Span(m) | Lifting height(m) | Total weight(t) | Total weight(t) | ||
|---|---|---|---|---|---|---|
| 9-20 | 7-8 | 1.92-8.16 | Auxiliary hook | |||
| 3 | 7.5-28.5 | 9-20 | 2.27-9.04 | 14-33.7 | ||
| 5 | 7.5-28.5 | 9-20 | 2.77-13.71 | 16.2-36.67 | ||
| 10 | 7.5-28.5 | 9-20 | 7-8 | 3.66-15.57 | 14.6 | 21.5-44.02 |
| 20/5 | 10.5-31.5 | 12 | 14 | 9.8 | 15.5 | 22.8-46.85 |
| 32/5 | 10.5-31.5 | 16 | 18 | 7.8 | 15.5 | 30.6-58.2 |
| 50/10 | 13.5-31.5 | 12 | 16 | 7.8 | 10.4 | 39-73.8 |
| 74/20 | 13.5-31.5 | 22 | 24 | 6.1 | 9.7 | 68.72-108 |
Here are detailed parameters: ldy-metallurgical-electric-single-girder-overhead-crane-parametric.pdf
Ladle crane safety measures:
- The main purpose of this equipment is to transport molten liquid metal, the working level is high, and the equipment safety requirements are extremely high.
- The working environment conditions are harsh, with high temperature, high dust and harmful gases. The heat insulation layer is set at the bottom of the main beam to prevent the high temperature radiation from adversely affecting the strength of the main beam, which may cause safety hazards.
- And the main hoisting mechanism motor is equipped with an overspeed switch to ensure that the hoisting mechanism in the state of failure of the reel end of the safety brake fast brake.
- Two brakes are provided at both ends of the high-speed shaft of the hoist reducer, and a safety clamp disk brake is provided at one end of the reel to prevent the hook from stalling and slipping.
- When the main hoisting mechanism adopts two sets of driving devices, when one of the motors or one set of electronic control device fails, the other set of driving devices should be able to ensure that the rated lifting capacity to complete a work cycle.
Project Cases
Maanshan Iron and Steel Factory 160t ladle crane
Luzhou Xinyang vanadium and titanium steel plant 360t foundry crane
Meigang 160t double girder steel mill ladle crane
Maanshan Steel 200t Four Girder ladle crane
Chengdu Metallurgy 280t four girder foundry crane
