Gi­ant shred­der a New Zealand first

Matamata Chronicle - - News -

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.

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