Metallurgical overhead crane application and requirements|Dongqi Group

Metallurgical overhead cranes are mainly used for cranes with ferrous and non-ferrous metal smelting. Compared with the general crane which has the use of frequent, harsh environment, high automation requirements.

Metallurgical overhead crane mainly has the form of single girder metallurgical crane, double girder form metallurgical crane.

Single beam form and double beam metallurgical crane that below 75 ton should meet the following requirements:

• Metallurgical overhead crane using the ambient temperature than the general environment of the temperature is higher, so all the motor should be all selected H-class insulation of the motor.
• All metallurgical overhead cranes must be installed from the weight limiter, and has a reliable alarm, limiting function.
• Double Girder Crane hoisting mechanism must be installed two sets of independent role of the brake, each set of brakes should at least ensure that another set of brake failure to complete a work cycle.
• Wire rope must use metal core high temperature wire rope, safety factor and work level match.
• The pulley should be preferred to use rolling pulley, prohibit the use of cast iron pulley.
• For the use of electric hoist as a lifting mechanism, the maximum weight does not allow more than 10 tons, and should have a thermal protection function.
• Should be equipped with different forms of rising limit position of the double limiter, and should control the different circuit breaker.
• The lifting mechanism should have a positive and negative contactor fault protection function to prevent the motor power failure and the brake is still in power and then lead to stall occurred.
• All electrical components should use high temperature products, cables should also use high temperature cables, electric control cabinet protection level should meet the relevant standards.
• The metallurgical overhead crane need to use the remote control to keep away from the heat source as far as possible, or must set the operator's safe channel to ensure the safety of personnel.

Metallurgical overhead cranes' requirements

• Metallurgical overhead cranes are used for specific service objects, often based on the crane's service object and process design dedicated extraction device and work organization.
• In order to improve the productivity of the crane, it is often much higher than the conventional bridge crane speed and acceleration, while the crane mechanism of the start and brake is very frequent, especially the operating agencies and rotating agencies often in the start, , So the choice of mechanism motor capacity need meet the necessary acceleration requirements.
• Crane lifting iron (steel) water temperature is high, the workpiece shape, weight, handling a wide range, from the big drop, therefore, the safety measures of the crane and safety protection device periodic inspection and inspection requirements are particularly strict.
• Metallic dedicated overhead cranes are responsible for specific process operations in black and non-ferrous metals. The basic structure is similar to that of an ordinary bridge crane, but a special mechanism or device is mounted on a trolley or hook.

The types and uses of bridge cranes for metallurgy are as follows:

• casting cranes, for the lifting of molten iron, molten steel, copper liquid, aluminum and other use, the main car hanging crane, auxiliary car for the flip and other auxiliary operations. The main trolley hanging with double hook, can be used directly for equipment lifting work.
• clamp crane for the lifting of metal hot ingots. Generally have to be modified, can be used for equipment hoisting.
• stripper crane, used to remove the ingot from the mold, generally not used for equipment lifting work.
• feeding machine, there are two kinds of suspension and floor, dedicated to the furnace into the furnace, generally not used for equipment lifting work.
• forging cranes, for large and forging hammer hydraulic press forging large parts, remove the hook hanging on the hook, can be used as equipment hoisting, but the hook down the higher limit position, for hoisting on the ground Weight. Should also be taken to replace the long rope and other measures. 

Dongqi Group not only provide metallurgical overhead cranes but also other types overhead crane,gantry crane,jib crane,electric hoist and Electric Winch, if your company need any crane or hoist,please contact me freely.