Hewitt Robins supply feeders for the Hemerdon project.

08 Aug 2014

Leading manufacturer of quarry processing equipment, Measham based Hewitt Robins International (HRI) has recently supplied a range of feeders for the £130 million – Wolf Minerals – Hemerdon project in Devon. GR Engineering Services (GRES) based in Perth, Western Australia, – are building the process plant as part of an EPC contract.

Located 6 miles north of Plymouth the Wolf Minerals site will when fully operational, be one of the world’s most important tungsten mines producing 5,000 tonnes/yr. of tungsten concentrate at 65% tungsten. This output represents about 3.5% of global forecast demand and will create approximately 200 jobs and consequently plough millions of pounds into the Devon and UK economies every year.

With planning permissions now in place to mine tungsten and tin at Hemerdon the processing plant is under construction and the demolition of the old infrastructure from the 1940’s commenced in 2013.

Following award of the contract to supply six feeders, HRI manufactured and detailed each feeder to meet the user requirements provided by the process flow diagram and equipment specification.

Charlie Northfield – Wolf Minerals – Process Plant Manager, commented, “We are pleased that HRI has been awarded the feeder contract. HRI conformed to the technical requirements GRES needed to meet. I personally visited the Hewitt Robins plant during final assembly and was impressed by the manufacturing quality and by the depth of technical expertise.”

HRI has now delivered to site a total of six feeders with varying duties all designed to process granite material.

Four (4) hanging feeders – 1.0m wide x 3.8m long, (one with hinged discharge end) rated at 370tph to 440tph with a max lump size of 100mm and a bulk density of 1.55t/m³.

One (1) hanging feeder – 0.9m wide x 3.0m long, rated at 71tph with a max lump size of 100mm and a bulk density of 1.8t/m³.

One (1) feeder, 0.9m wide x 2.0m long, rated at 75tph with a max lump size of 100mm and a bulk density of 1.8t/m³.

All are Umbex feeders developed by HRI as a cost effective solution for specific applications. HRI feeders supplied for the Hemerdon project set the standard for high productivity, exceptional reliability, ease of maintenance and are driven by twin low noise vibrator motors.


  • Bespoke design for the application
  • Extra heavy duty
  • Grizzlies available in horizontal, sloped or stepped arrangements
  • Bolted construction allowing single component replacement
  • Wear resistant design
  • Ease of servicing – minimum downtime
  • Bolted AR wear liners
  • Eccentric shafts avoid the need for cumbersome counterweights