Giant shredder a New Zealand first
In what is thought to be a first for New Zealand, a 15 tonne machine is now up and running in our district – that means tyres can be recycled rather than stockpiled.
The machine is a dual speed tyre shredder capable of processing whole steel belted radial, passenger, light truck as well as some tractor tyres.
It is 3.1 metres by 3.5 metres in size, has conveyors that are 15 metres long and is powered by a separate diesel generator.
Manufactured by Columbus McKinnon Corporation in Florida, the machine was assembled by Matamata firm Rex Barnes Engineering and spokesman Jamie Barnes said it took a team of three about a week to put it together for recycling firm Carbon Recovery Ltd.
‘‘We used our own plant and cranes to put it together but we were liaising all the time with the American commissioning engineer to ensure it went smoothly,’’ Mr Barnes said.
‘‘We were approached because of our experience with conveyor systems and our proximity to the final site, plus Carbon Recovery wanted to use locals to help the local economy.’’
Now installed at a local site, Mr Barnes said even initial testing had shown what the technology was capable of.
‘‘During testing and commissioning in the first four days, 8000 tyres were recycled which is very good for the environment.
‘‘It is pushing towards New Zealand being able to maintain its clean, green image – recycling instead of stockpiling.’’
The shredding process sees tyres fed through high alloy steel knives on two centre rolls, then through a double deck classifier which grades the chip. At full capacity the machine is able to primary shred 22-24 tonnes per hour, reducing whole tyres to two inch chips in seconds.
Mr Barnes said these chips could then be used for different purposes.
‘‘Chips are a clean fuel which can be used at places like steel mills to supplement fuel sources.’’
Eventually tyres from around the North Island will be brought to the site to be recycled.