IM 2018 January 18 | Page 73

PROCESS DESIGN per hour gravity plant from its Nickol River operations near Karratha to the Radio Hill site, where it will be installed in readiness to process sizeable bulk samples of gold bearing conglomerates, in conjunction with a multi-stage contract crushing plant, when required. Outotec on ore sorting For Radio Hill, Gekko Systems Pty Ltd have been asked to provide a comprehensive two stage gravity gold plant with a nominal capacity of 70-100 t per hour from the Radio Hill decline, and has been well maintained since it was put on care and maintenance nine years ago. It consists of a two-stage crushing plant, primary grinding mills, two discrete multi-stage flotation circuits, separate concentrate filtration plants and a tailings thickener. A plant laboratory and fully equipped workshops have been maintained on-site. The Radio Hill complex offers several key advantages for getting Artemis into gold and base metals production earlier and more cost effectively than would otherwise be possible, as; n The Radio Hill site is fully permitted for operations; n There are permitted tailings storage facilities on site; n Existing infrastructure for mains power supply has been well maintained; n Strong water supply from an existing bore field with proved capacity and quality; n Radio Hill is only 35 km from Karratha so there is no need to establish expensive camps and associated infrastructure for the work force Artemis has also started relocating its 100 t Sensor-based ore particle sorting offers a powerful method for pre-concentration or waste rejection early in the comminution process. The technology analyses each and every rock particle on-line for unique physical and chemical properties and separates the particles by high pressure air jets. This maximises recovery or upgrade and is suitable for various minerals and applications. Successful implementation relies on ore heterogeneity, differential sensor response and suitable feed preparation. Sensor-based sorting has been around since the 1970s. In the early days mainly radiometric and photometric sensors were used to distinguish characteristics of materials. As it is common with new technology it was very expensive, and computing performance was highly limited making it often not economic viable. The information revolution at the turn of the millennium boosted computing power, making it cheap and available. Today data reconciliation, validation and analysing does not limit the sorting process any more. The focus on 26 – 28 June | Hillhead Quarry | Buxton | Derbyshire | UK 3 Days | Live Demonstrations Register free today at hillhead.com | 500 Exhibitors | Free Entry #Hillhead18