Ultrafine grinding is used to liberate gold finely disseminated in metallic sulfides. KCGM is the first gold mine using ultrafine grinding followed by cyanidation (Ellis and Gao, 2002). The gold sulfide concentrate is grind with an IsaMill to a P 80 of 10–12 μm.
dramatically increases the grinding surface area and the number of grinding "events", essential to efficiently grind fine particles. Figure 1 shows the grinding power required to grind a sample of KCGM pyrite concentrate to different target P80 grind sizes, using a ball mill (with 9mm steel media) or an IsaMill with sand media.
The patented IsaMill is a transformation in grinding technology based on high intensity stirred milling. The IsaMill was developed for fine grained orebodies that needed a step change in processing efficiency to be economic. The IsaMill significantly reduces the energy requirement, and media and capital costs of fine grinding.
Woodlawn Zinc-Copper Project to Use IsaMill™ Grinding Technology . Heron Resource's Woodlawn Zinc-Copper Project has selected IsaMill™ technology for their project. The project is based 220km south west of Sydney, at the site of the former Woodlawn Mine, which has reclaimed tailings and underground mineral reserves.
Development of IsaMill technology at Anglo Platinum concentrators The potential benefit of ultra-fine and fine grinding (UFG), has been identified for various applications at Anglo Platinum Concentrators over many years. An ongoing programme to investigate the technology has been running intensively for the last seven years. This
IsaMill™ Grinding Solutions' performs IsaMill™ testing using a Netzsch LM4 mill, which has the exact same internal dimensions and workings as the IsaMill M4. Signature plot testing using the IsaMill™ provides data on the specific energy required to reach product size and can be used in the design of IsaMill™ grinding circuits.
Developments in applications –IsaMill Initial Application – Very fine grinding Later Additional Applications 1. Normal regrinding 2. MIG –Mainstream Inert Grinding (10000 litre mill development) 3. Last stage of primary grinding (feeds up to 300 micron –80% passing size) Note: Examples of 1 and 3 exist now at McArthur River site, in ...
velocity of the grinding media along the mill's radius. IV. EQUIPMENT USED A. High-Intensity Stirred Mills Fine grinding is usually performed in high-intensity stirred mills; several manufacturers of these stirred mills exist. Two frequently used stirred mills include the Isamill, produced by Xstrata Technology, and the SMD, produced by ...
The IsaMill (high capacity horizontal stirred mill) is referred to as an enabling technology. Through significantly lowering the cost of fine grinding, many locations that had high grade but fine-grained ore became economical. Stirred mill technology energy efficiency is extremely dependent upon several variables including grinding media selection.
FINE GRINDING IN THE AUSTRALIAN MINING INDUSTRY Dr Aleksandar Jankovic, Walter Valery, David La Rosa Minerals Process Technology Australia and Asia-Pacific ABSTRACT Fine grinding of metalliferous ores has become increasingly important for the Australian mining industry, as many of the remaining orebodies are very fine-grained and refractory.
Ultra Fine Grinding. UFG mills overcome these limitations by the use of rotating stirrers inside a stationary mill shell. Ultra fine grinding mills have been in use for many years in a large number of every day applications such as pharmaceuticals, dyes, clays, paint and pigments before being used in the mineral processing industry.
Fine grinding: How mill type affects particle shape characteristics and mineral liberation. ... This may be of interest for operators of UG2 ore concentrators with a ball mill and optional IsaMill grinding stage prior to secondary rougher flotation. Differences in flotation circuit performance when the IsaMill is on or off-line, are unlikely to ...
Comminution. Grinding Solutions offers an extensive range of comminution services, ranging from SAG mill testing to fine and ultrafine grinding. Tests range from industry standards, such as Bond Work Index Testing, to cutting-edge techniques such as pulp chemistry monitoring, to help optimise comminution circuits.
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