OREANDA-NEWS. June 30, 2010. Uralmashplant has won the tender and signed the contract for the delivery of laddle crane. The crane features capacity of 500+100/20 t and is designed for oxygen-converter plant at Severstal JSC. Scientific production association VNIIPTMASH (Moscow) has performed the design and Uralmashplant has manufactured the crane (the total weight is about 700 t). The contract performance date is April 2011.

The crane is of a similar design as previous laddle cranes that were delivered to Severstal JSC in 2008-2009 and demonstrated good operating characteristics. It was that effective operation experience that determined the tender final solution.

The cranes manufactured for Severstal JSC are classified as new generation of laddle cranes. For the first time in Russia the cranes of such capacity are equipped with variable frequency drive and feature braking energy recuperation system.

The equipment survivability is of a high class since the cranes are exposed to intense dust concentrations and high temperatures while operation. To protect the equipment from thermal exposure extra screening of the constructions is provided, control cabinets are placed into air-conditioned containers and compressor units of air-conditioners are located at the "cold" area of the crane to keep them away from the coveter.

Another off-standard design solution is complete drive reservation of the main crane mechanisms. Thus when one of four main-hoist engines fails, the rest engines shall provide continuous operation of the crane; and in case one of the transformers switches off it is possible to operate the other one, since each of two rectifiers guarantees stable operation of all drives.

Profound examination of the drives and systems in operation is provided at Uralmashplant cranes. Modern information system controls crane capacity: the main 500-t hoisting unit features weight-measurement system with data of the weight lifted being transferred to the shop operator via radio channel.    

Uralmash Machine-Building Corporation is one of the leaders in the Russian market of metallurgical, mining, oil- and gas-producing industrial equipment, as well as the equipment for construction-materials industry and power industry. The development strategy of Uralmash Machine-Building Corporation is to create a state-of-the-art machine-building corporation, which will be able to fully satisfy the customers' needs for equipment. The production sites of Uralmash Machine-Building Corporation are located in Yekaterinburg (Uralmashplant) and Orsk (ORMETO-YUMZ).