QDY steelmaking industry overhead crane
Ladle overhead crane introduction
Ladle overhead crane is designed for transporting, pouring and charging hot metal in the process of smelting liquid metal, etc.
According to the crane structure, the ladle overhead cranes can be classified into Double Girder Double Rail Ladle Cranes, Four Girder Four Rail Ladle Cranes, and Four Girder Six Rails Ladle Cranes. The front two types are used for lifting middle and large scale ladles, and the latter one is used for extremely large scale ladles. DQCRANES is capable of offering customized ladle overhead crane without lifting capacity limitation.
Ladle overhead cranes offering of DQCRANES
DQCRANES manufactures and supplies various ladle cranes for different applications in steel industry. DQCRANES can provide you ladle cranes with lifting capacity range from 5t to 74t, span from 10.5m to 31.5m, Temperature range: -10℃～+60℃ and working class A7, and the specific specifications is shown in the following table:
| Product Type | QDY |
|---|---|
| Lifting Capacity | 5~74t |
| Span Length | 10.5~31.5m |
| Working Class | A7 |
| Ambient Temperature | -10~60℃ |
Specifications for ladle bridge cranes are shown in the table below:
| Capacity | t | 5 | 10 | 16/3.2 | 20/5 | 32/5 | 50/10 | 75/20 |
| Span | m | 10.5~31.5 | ||||||
| Lifting height | m | 6~24 | ||||||
| Lifting speed | m/min | 15.5 | 10.4 | 10.7/14.6 | 9.8/15.5 | 7.8/15.5 | 7.8/10.4 | 6.1/9.7 |
| Trolley speed | m/min | 37.2 | 43.8 | 44.6 | 44.6 | 42.4 | 39.3 | 33.8 |
| Crane speed | m/min | 92.7/93.7 | 92.7/93.7/86.5 | 76/89 | 76/89 | 89/75.3 | 75/76.6 | 67.3 |
| Work duty | A7 | |||||||
| Track type | P43 | P43 | P43 or QU70 | P43 or QU70 | P43 or QU70 | P43 or QU80 | QU100 | |
 |
 |
Production Features
Due to a high risk level, ladle cranes are designed with special safety features to ensure the efficiency and safety of crane system. The features of ladle cranes are as follow:
- Double sets of independent action brakes is installed to the lifting mechanism.
- Heavy hammer and rotary lifting position limiters is installed and down position limiter will be installed when crane hoisting height is more than 20 m.
- Over speed protection equipment is stalled.
- Fault protection devices, such as, positive and negative contactor is installed to prevent dangerous in case of electricity power off.
- Insulating layer is installed at the bottom of main girders to prevent molten steel thermal radiation to ensure the long serving life of main girders.
- Special designed metallurgy motor is used, with insulation class H level, and motor protection grade IP54.
- Cast steel pulley is used to ensure the safety and long working life.
- Steel core wire rope is used, which is suitable for high temperature environment with the safety factor≧ 7.1.
- High temperature resistant cable is used for the power supply of trolley.
- Thermal insulation layer and air conditioning is equipped to the cabin.