Heavy Duty Overband for Incinerator Plant
- 17 September 2007
- Company & Industry News
35 years ago CSWDC purchased an Overband magnet to function within the incineration plant. They purchased the magnet from the company formerly known as Industrial Magnets Ltd, the overband was designed by an engineer named Geoff Worley. He designed the overband using the old fashioned method of pencil and drawing board, long before Auto CAD and Computers were used. Geoff later went on to start his own magnet company, Master Magnets Ltd which was established in 1978, over the years Master Magnets prospered and its product range, services, capabilities and facilities grew with the company. Industrial Magnets were eventually taken over by Integrated Recycling Systems (IRS) Ltd, and then just to complete the circle Master Magnets acquired IRS Ltd in 2005 expanding their capabilities even further.
Early in 2006 CSWDC contacted Master Magnets after finding out they are now the parent company of IRS Ltd and thus Industrial Magnets. CSWDC explained to Master Magnets Ltd that their Overband magnet which was originally bought from Industrial Magnets Ltd 35 years ago no longer operated, and they wished to either replace it or purchase a new one, they were very surprised the find out that Geoff is now the Chairman of Master Magnets and he is still fully involved within the Magnet industry.
Master Magnets recommended that a site visit would be beneficial, to enable a Mastermag engineer to evaluate if the unit needs to be replaced or repaired. After a discussion with head office and CSWDC, the engineer decided that the best strategy would be to design and manufacture a new overband magnet. The new magnet would prove to be more efficient incorporating a more modern design.
The proposed Overband Magnet would have to meet CSWDC requirements.
- It will be required to be able to extract metal from incinerator ash moving at approximately 12 tonnes/hr.
- It will be required to be able to operate at a working gap of 300mm.
- It should be heavy duty and capable of handling warm material straight from the incinerator ash.
- It must operate over a belt width of 1.5 metres.
After Master Magnets fully understood CSWDC requirements they were able to quote the appropriate overband. Master Magnets recommended that CSWDC should replace the old unit with an Oil Cooled Coil Wound (OCW) Overband magnet. The OCW overband has a high magnetic strength producing 869 gauss at the required working gap of 300mm, more powerful than the previous unit installed which could only produce 500 gauss. Due to the high magnetic strength the overband would be able to work at an increased operating gap if required enabling it to extract ferrous from a deeper burden, and at a faster speed thus increasing the feed rate.
CSWDC were impressed with the proposed solution, and they understood the potential benefits that the stronger magnet would give. Consequently they agreed to place an order. The overband was custom designed and manufactured to fit directly into their incineration plant conveyor, the unit weighed just over 5 tonnes meaning that the frame supporting the unit had to be specially modified.
The overband is now in full operation at Coventry working within their incineration plant. CSWDC expect the unit to pay for itself within months, and the overband is expected to last for another 35 years or more.
If you have any similar separation requirements please do not hesitate to contact Master Magnets or visit us online. The website shows our full range of products, capabilities and services with brochure and video downloads available direct from the site.