ISAMILL FINE GRINDING TECHNOLOGY AND ITS INDUSTRIAL …
A total of 15 IsaMills are in use at these operations. Figure 1 shows the eight IsaMills at the Mount Isa Mines Lead/Zinc Concentrator. Figure 1: IsaMills in the Regrind Circuits at the Mount Isa Mines Lead/Zinc Concentrator The IsaMill is a horizontal high speed stirred mill that operates with very high power intensities (up to 350 kw/m 3 ).
Accurate scale-up
So a key feature of IsaMill™ technology is that all full production IsaMills™ can be accurately scaled up from testwork in a four-litre (M4) laboratory mill using as little as 12.5kg of sample. ... For an SG of 3 (e.g. Copper), it's 15kg. For an SG of 3.5 (Copper, Lead, Zinc) it's 17.5kg. For an SG of 4 (Pyritic Gold) it's 20. And for an SG ...
Improving IsaMill™ energy efficiency through shaft spacer …
There are a number of potential benefits and considerations for IsaMills™ operating with the new conical spacers due to the improved grinding efficiency: ... N.W., Gao, M., Young, M.F., Cronin, B., 1998. Application of the IsaMill™ (a Horizontal Stirred Mill) to the Lead/Zinc Concentrator (Mount Isa Mines ltd.) and the Mining Cycle. In ...
Performance of the IsaMills in the George Fisher Flowsheet
Six new IsaMills were installed for the George Fisher flowsheet in the Lead/Zinc Concentrator of Mount Isa Mines to produce a product P80 as fine as seven microns. …
The IsaMill™
In 1999 additional IsaMill™s' were installed in the lead/zinc concentrator to treat the George Fisher orebody at Mount Isa. These IsaMill™ installations increased sphalerite liberation by a further 5%, but zinc recovery increased by 10% and zinc concentrate …
ISAMILL FINE GRINDING TECHNOLOGY AND ITS …
Eight IsaMills operate in the Lead/Zinc Concentrator at Mount Isa Mines, with two installed in 1994 and six commenced operation at the end of 1999. (Enderle et al, 1997; Johnson et al, 1998; Young et al, 2000). These are required …
IsaMill Technology Used in Effecient Grinding Circuits
Lead/Zinc deposits at Mount Isa in Queensland and McArthur River in the Northern Territory, both ... Grinding media is retained in the mill without the need for screens, which is why IsaMills™ can use fine media. At the end of the mill is a patented product separator consisting of a rotor and displacement body (refer to Figure 3). ...
The George Fisher Project to Increase Recovery in the Mount Isa Lead
The installation of the George Fisher flowsheet in the lead/zinc concentrator at Mount Isa Mines Limited has recently been completed. The George Fisher flowsheet involved moving flotation capacity from the lead circuit to the zinc circuit and changes in zinc circuitry, changes in the reagent regime and increased regrinding capacity, using IsaMills, to …
India Lead Zinc Development Association: ILZDA
India Lead Zinc Development Association, popularly known as ILZDA in brief, set up in 1962, is a non-profit non-commercial organization registered under Societies Act 1860, dedicated to market development and dissemination of technical information in respect of Lead, Zinc and their downstream applications. ILZDA is a technical body; not a trade ...
IsaMills Roll into New Ore Grinding Applications | E & MJ
Originally developed for fine grinding down to 7 µm for lead/zinc ores, Xstrata Technology says the IsaMill has also established itself in coarser applications for a variety of ore …
A HISTORY OF ISAMILL PROGRESS AT THE TECK RED …
Introduction. The Teck Red Dog Operation in Alaska has been running two IsaMills in the zinc circuit since 2011. These two IsaMills replaced seven smaller vertical tower mills. The circuit is shown in Figure 1. One IsaMill treats the zinc rougher concentrate while the other treats the feed to the zinc retreat circuit.
Schematic of ISAMILL | Download Scientific Diagram
As the result of this development, a 3000 litre and 1.1 MW motor power unit was designed and installed, first in Mount Isa Mines lead/zinc concentrator (1994, two mills) and then at McArtur River ...
Caribou is producing zinc and lead concentrate
Ongoing initiatives are focused on optimising charge rates, grind characteristics and media composition. Fine tuning of the IsaMills has them now operating at near nameplate grind size of 12 micron. Flotation – Both zinc and lead flotation circuits, including the rougher and cleaner cells, are all online. Additional piping and pumping ...
Collaborative Technology Development – Design And …
Initially, two M3000 IsaMills were installed in the Mount Isa lead/zinc concentrator in 1994. This was then followed with four M3000 IsaMills in the McArthur River concentrator in 1995 [4]. These were required to achieve ultrafine grinding for liberation of fine grained minerals and then achieve good separation of the minerals by
COMMINUTION
• The mills were first installed at the Mount Isa lead zinc concentrator, where they increased lead performance by over 5%, and zinc performance by over 15%. • Once developed, the IsaMills enabled the development of the McArthur River deposit (and several others since). • The IsaMills spawned a range of similar
TOWER FINE MILLING EXPERIENCE AT MOUNT ISA …
With the installation of the two ISAMills, the Tower mill was shifted to the zinc retreat circuit (see Figure 3). Secondary Ball Mills Lead Prim ary Rougher Zinc Rougher Rod Mills ... The Mount Isa Lead-Zinc Concentrator Tower mill is used for fine grinding of fine grain particles near the tail of the circuit. It had a similar performance in ...
Effects of disc rotation speed and media loading on particle …
It has been applied to base metal operations such as lead and zinc mines, and for the liberation of gold particles from sulphide minerals for cyanidation. Compared with the conventional grinding technologies such as tumbling mills or tower mills, IsaMills TM are more energy-efficient, as they can make use of grinding media of small sizes ...
IsaMills™ selected for Kazakhmys' Bozshakol and …
the top five global producers of copper, thermal and metallurgical coal, ferrochrome, zinc and nickel and we also produce silver, lead, platinum, gold, cobalt and vanadium. Founded in 2002 and headquartered in Switzerland, we operate in over 20 countries and employ over 70,000 people at more than 100 operations and projects around the world.
Regrind Mills: Challenges of Scaleup Abstract
This mill is filled 80% with media of the same size as final application (typically 1-3 mm), and agitated at 1500 RPM. The mill configuration and operation – discs, disc speed; media size, media type and media filling; and mill discharge classifier – are all very similar to the full scale operation. Therefore the feed particles "see ...
IsaMills™ selected for McArthur River Mine Expansion
IsaMills™ selected for McArthur River Mine Expansion Mount Isa, 7th November 2012 ... lead, platinum, gold, cobalt and vanadium. Founded in 2002 and headquartered in Switzerland, we operate in over 20 countries and employ ... Zinc is a versatile material that plays a vital role in modern society. It is an essential nutrient in
How it works
How it works. Eight consecutive grinding chambers, patented product separator and short residence times means the mill constantly delivers sharp product size distribution without external classification. The IsaMill™ is a closed mill. Slurry travels through the mill in a 'plug' flow pattern through consecutive grinding discs.
ISAMILL FINE GRINDING TECHNOLOGY AND ITS
Figure 3: Mount Isa Mines Lead/Zinc Concentrator Flowsheet The designed specifications of the IsaMills in the lead and zinc circuits are listed in Table 1. The product P80 sizing of 12 micron for the lead and zinc regrind IsaMills was required to liberate the galena and sphalerite from the gangue materials in the lead rougher concentrate, zinc ...
Application of the ISAMILL (A Horizontal Stirred Mill) …
The ISAMILL performance for processing both lead and zinc streams at Mount Isa is discussed in this paper, including the milling energy efficiency, the media …
Influence on fine lead–zinc tailings solidified/stabilised by …
The total annual amount of lead–zinc tailings (LZTs) in China is projected to reach 500 million tons by 2020 [1]; however, the country's comprehensive usage rate is only ∼10% [2].Stacking many LZT wastes land resources and causes heavy metal pollution in the soil and water bodies around the mining area [1], [3].Tailing cementation backfilling …
IsaMill medium competency and its effect on milling …
This paper discusses the performance of two inert grinding media in the IsaMills that are used at Mount Isa Mines Ltd. for the processing of galena- and …
HIGH PRESSURE GRINDING ROLL TECHNOLOGY
Two 1.1 MW IsaMills™ are now used in this duty contributing to a 27% increase in overall plant throughput and a reduction in rougher feed size distribution. In this paper, we ... (MIM, now Xstrata), particularly for the McArthur River lead/zinc deposit where a 7 µm grind was required, under efficient and inert conditions, in order to make a ...
Jameson Cell
The Jameson Cell is an innovative flotation process driven by fluid mechanics. The advantages of modern Jameson Cells are: consistent fine bubble generation with no external equipment or spargers. intense mixing with small bubbles achieving rapid flotation without mechanical agitation. high throughput in a small footprint.
Application of the ISAMILL (A Horizontal Stirred Mill) to the Lead-Zinc …
Fine grinding technology has become extremely important for Mount Isa Mines Limited in the last decade for flowsheet development for the McArthur River deposit and in rejuvenating the Lead-Zinc Concentrator at Mount Isa. Regrinding products with 80 per cent passing seven microns and 12 microns were required, respectively, for the McArthur …
Isasmelt and IsaMills
MIM Holdings Limited has acquired a reputation for the successful application of R&D to develop break-through technologies for the mining industry. The Isa Process tank-house technology has been licensed to copper refineries throughout the world, and almost 40 per cent of the world's copper is refined using this technology. Isasmelt copper and lead …
IsaMill ultrafine grinding for a sulphide leach process
lead/zinc concentrate. A further six 1.1MW . IsaMills will be installed in Mt Isa to treat zinc . concentrates from the George Fischer Mine, commencing June, 1999. APPLICATIONS .
