FMR Investments

Toll Milling Operations – Greenfield’s Mill

Greenfield’s Mill is situated 3 km east of Coolgardie just off the Great Eastern Highway. The mill has provided a first class toll milling facility to the gold industry for over twenty years. The plant is very unique in so much that with three Ball Mills; the circuit can be optimized to suit a particular client’s needs to maximize gold recovery. In the current configuration the plant is able to treat up to one million tons per annum after going through a number of upgrades during the last two years.

The crushing circuit is a three stage crushing system comprising of a Metso C130 as the Primary Crusher , a HP300 as a Secondary Crusher and a Metso HP4 as the Tertiary Crusher with the Secondary and Tertiary feed being screened over a double deck 20x8 Nordberg Screen. Crusher feed is handled by our own Volvo loaders which also stockpile ore that has been delivered by the clients’ cartage contractors. The product produced from the crusher circuit is crushed to a final size of 6mm and stored in a 1000t mill feed bin.

The Mill circuit consists of a 1300kw Ball Mill, an 875kw Ball Mill and a 500kw Mill. Classification of leach feed product is handled by both 15 inch standard and Cavex Cyclones. A gravity component is treated through a Falcon Concentrator whose product is sent to the gold room for direct smelting. The overflow product from the Cyclones is sent to a CIL circuit consisting of four leach tanks and nine adsorption tanks; carbon is moved counter current with loaded carbon being removed on an as need be basis and stripped in a four tone pressure Zadra circuit. Gold from this circuit is electro won on to steel wool and direct smelted before shipment to an external refinery.

Current clients include Northern Star Resources and the Rand & Tribune JV. These clients have their ore treated on a rotating campaign basis.

For further information about the mill please contact the Mill Manager on 08 9026 7208.

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Suite 11,
2 Hardy Street,
South Perth
Western Australia 6151
Locked Bag 6,
South Perth
Western Australia 6951