MATERIALS HANDLING
Hägglunds CBM motors were deployed
2000–1400 motors per apron feeder. It was a welcome solution that easily met the requirements. “We wanted to have some power
in reserve, so that’s good. It gives us a maximum capacity of 9,000 tons per hour. It also gives us redundancy for all the main components, so we can drive with one motor if needed,” says Larsson.
SUCCESS FACTORS Te new plant was commissioned in June 2018 and the Aitik mine is now running at full production capacity. “After a few weeks of testing we went on summer vacation. I was away for five weeks and everything worked perfectly! Te plant has now processed more than six million tons of ore and there has not been a single incident. Te fact that production is running so smoothly at this early stage is an excellent result. Especially when the plant was custom-built specifically for our needs.”
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The drive unit can be placed wherever convenient
Te drive systems take up minimal space and allow fast replacement of components, thanks to the splined couplings. Larsson reckons they make installation incredibly easy. “Te main benefits are that we have
improved availability while reducing maintenance costs. Te hydraulic drives provide better access from the sides and make the plant easier to maintain. Te way things are looking now, we won’t need to work on them, but if we do have
to replace anything we have really good access. Another big advantage is that we can reverse the hydraulic drives during maintenance.” All that remains to do now is a few small adjustments and performance tests. Boliden will take both crushers and drive systems up to maximum load and check that they produce the tonnage required. A big part of the performance testing is to ensure that the plant can meet availability targets over the course of a month. “It all looks good so far. If this turns
out well, we will probably use hydraulic drive technology elsewhere. For our big conveyor systems in particular, the Hägglunds drives are definite contenders,” says Larsson.
Uno Sundelin is with Hägglunds.
www.boschrexroth.com/hagglunds
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