zoom Mammoet, a global provider of engineered heavy lifting and transport, is currently employing its Liebherr LR13000, the biggest crawler crane in the world, to install four platform legs on Van Oord’s newest wind turbine installation vessel, the Aeolus.In 12 days the giant crane has been assembled at Lloyd Werft in Bremerhaven, Germany. The first of the four 87 meter long steel platform legs, each weighing 920 tons, has already been settled into its jacking position on the 139 meter long and 38 meter wide vessel.For this job, Mammoet designed, fabricated and delivered tailor-made top lifting tools and a tailing frame to ensure that the legs, that have no lifting points, can be lifted securely.In addition to the platform legs, Mammoet will also install four spudcans, using a specially engineered method. This method involves placing the partly rigged spudcans on the seabed, moving the Aeolus over it and connecting the spudcan with the leg with the use of cranes and divers.Execution started on 22 April, and will continue round the clock for a fortnight. The Aeolus is scheduled to be operational in July of this year.Mammoet, April 28, 2014
Teck Cominco’s Highland Valley copper mine is cleaning up to improve equipment reliability, increase profitability and better safeguard the environment. The mine has developed a contamination control programme in conjunction with Finning (Canada) and Caterpillar. Highland Valley, Canada’s largest open pit, located about 60 km southwest of Kamloops, British Columbia, moves close to 225,000 t/d of ore and waste every day using shovels and a fleet of Cat 789 and Cat 793C haul trucks.Back in 2001, Highland Valley switched to premium quality lubricating oils and installed new filters, some as fine as 6 micron, on trucks and storage tanks. To further reduce dirt ingress, the company also equipped the tanks with finer breathers. A kidney-loop filtration system for cleaning axle housing oil was added to the wash bay. Warm fluid circulates through the system for a period of six hours. Both the axle housing oil and hydraulic lubricants are then flushed through a series of 3-micron filters for an additional eight hours. Workers test samples before and after the cleaning process to ensure high quality.The results of the programme show some dramatic improvements. Oil life increased from 2,400 to 7,000 hours in the axle housings and from 2,400 to 10,000 hours in the hydraulic systems. Fleet availability increased from 86% to 90%. Despite higher initial lubricant costs, Highland Valley estimates it saved $300,000 in 2004 alone by adopting the new procedures.But Finning reports the best news of all was for Teck Cominco’s environmental record. Oil filters had to be changed less frequently, cutting consumption by more than 50%, and furthermore, waste oil set aside for disposal decreased by 137,701 litres.