Orway Mineral Consultants Crushing, Grinding and Hydrometallurgy Specialists
Orway Mineral Consultants (OMC) specialise in all aspects of crushing and grinding modelling, site circuit optimisation, and provide hydrometallurgical expertise. The Australia and Canada-based consultancy is a world leader in comminution, providing a range of services to the mineral processing community. With a primary focus on grinding applications, OMC was instrumental in the wide acceptance of SAG milling in the mining industry.
Comminution
OMC provides crushing and grinding circuit selections and major equipment sizing services for both greenfield and expansion projects. By interpreting rock breakage comminution testwork data and modelling, OMC can determine the most efficient crushing and grinding circuit configuration for all ore types:
- Autogenous/semi-autogenous milling
- SAG and ball milling, recycle crushing
- Secondary/tertiary crushing ball milling
- HPGR ball milling
- Fine grinding
- Rod milling
- Scrubbing
Work is undertaken as part of engineering scoping/pre-feasibility, definitive feasibility studies or detailed design which includes:
- Metallurgical test work specification and supervision
- Comminution circuit modelling and major equipment selection
- Flow sheet selection
- Piping and instrument diagrams
- Mass balances
- Operating costs
- Process design criteria
- Process and engineering design for new and upgrade projects
- Studies and independent reviews
OMC provide exclusive mill sizing services to Outotec.
Grinding circuit optimisations
OMC undertake many grinding circuit optimisations worldwide, providing clients with significant cost savings and increased production levels often requiring no capital input.
Comminution circuit optimisations typically involve circuit audits and collection of circuit data. This includes major equipment sizes and operating conditions. Mass flows, particle size distributions and densities for each stream are collected along with samples for ore characterisation testwork.
Considerable improvements in plant performance are often obtained through recommended changes to control philosophies and training based on preliminary audit results.
Survey data is model fitted using a combination of OMC power based and JKSimMet modelling techniques. Simulations are undertaken to assess influences of varying process parameters on circuit performance. Recommendations are made based upon analysis of data and specific problem areas are identified. These typically include changes to:
- Mill feed size
- Control strategy
- Pulp density
- Recycle crushing
- Cyclone configuration and operation
- Throughput
- Ball load levels
- Liner and grate design
- Circulating load control
Expertise is provided across a wide range of commodities including gold, copper, nickel, iron ore, uranium, manganese, lead/zinc and mineral sands.
Hydrometallurgy services
OMC has fostered a highly skilled team specialising in the field of hydrometallurgy. OMC understand issues in complex hydrometallurgical processing with expertise in a wide range of commodities including: uranium, nickel, copper, cobalt, platinum group metals, gold and safe disposal of metalloids that co-exist.
Services include:
- Sample selection
- Testwork specification and pilot plant supervision
- Modelling and mass balancing
- Studies and design
- Audits/due diligence
- Client/owners team support
- Commissioning
Nickel / Cobalt – OMC has experience in leaching nickel and cobalt from both lateritic and sulphide deposits via atmospheric, pressure oxidation or metathesis process. Leach products can be taken through purification using solvent extraction, precipitation or ion exchange process to crude and pure semi-products, or refined to metals (divided cells for example).
Copper – OMC has experience in leaching copper from low and high grade oxide deposits via heap leaching and tank leaching, sulphide concentrate leaching via low and high temperature pressure oxidation process as well as SXEW or direct EW. OMC are involved in producing super concentrates via concomitant removal of uranium, cobalt, arsenic and other deleterious elements from copper sulphide concentrates.
Platinum Group Metals (PGM) – OMC has design and operating experience in refining, to 4N purity, of platinum group metals and gold. Feed sources are typically concentrates from mattes and secondary feed stocks (e.g. spent autocatalysts).
Processes include classical chloride systems and newer technologies incorporating substituted quaternary ammonia salts (SQAS).
OMC can design to NIOSH/ACGIH air quality standards.
Uranium – Design and operating experience with calcrete, sandstone, granitic and sulphide hosted deposits across the globe. We routinely scope and supervise testwork programs, as well as pilot plant trials, using acid or alkali leaching methods followed by solvent extraction or ion exchange concentration.
OMC assists the International Atomic Energy Agency (IAEA).
General metallurgical services
Flotation
OMC has expertise in base metal and refractory gold ore flotation. Techniques include bulk, differential and collective/selective methods at laboratory, pilot plant and conventional full scale.
Gold metallurgy
OMC has strong gold processing expertise and can provide assistance in all aspects of gold processing including:
- Testwork sample selection representivity and variability
- Specification/supervision of testwork programs to determine optimal extraction conditions
- Gravity gold extraction, intensive cyanidation leaching or gravity finish
- Leach/adsorption circuit specification and operation
- Refractory gold processing
- Desorption circuit specification and operation
- Goldroom operations and smelting
- Auditing, operations reviews
- Cyanide destruction
For more information, please contact OMC.
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Mount Carlton Comminution Circuit Design, Start-Up and Optimisation
The Mount Carlton project in Queensland's North East sits on a high-sulphidation epithermal style deposit rich in gold, copper, and silver.
4 October 2018
Mako Project Processing
The Mako Fold Project is located in south-eastern Senegal in the Kedougou region, close to the Gambia River and township of Mako.
25 June 2018
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Goro Nickel Project, South Pacific Island of New Caledonia
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Tulawaka Gold Mine
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Akyem Gold Mine
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3 February 2014
Agbaou Gold Mine
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23 November 2009
Atlas Wodgina Project
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28 September 2009
Kittila Gold Mine
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11 May 2009
Peak Hill Gold Mine
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Kalgold Gold Mine
Kalgold mine is an open pit operation owned by South
Africa-based Harmony Gold Mining Company Limited. Located 60km
so
Africa-based Harmony Gold Mining Company Limited. Located 60km
so
30 March 2009
Spence Copper Cathode Mine, Atacama Desert, Chile
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15 March 2009
Geita Open Pit Gold Mine, Mwanza, Tanzania
The Geita open pit gold mine is 80km south-west of the town of Mwanza in the north-west of Tanzania and is 100% owne
25 February 2009
Mt Muro Gold Deposit, Kalimantan, Indonesia
The Mt Muro Gold deposit is located in Indonesia's Central Kalimantan (Borneo) less than 100km south of the equator.
24 February 2009
Tritton Copper Mine, New South Wales, Australia
The Tritton copper mine is located near the town of Nyngan in central New South Wales, Australia, and is owned by Strait
8 February 2009
Boddington Gold Mine (BGM), Western Australia (WA)
Boddington Gold Mine (BGM) is located about 130km south-east of Perth in Western Australia. The largest gold mine in the country, it is poised to become the highest producing mine once production ramps up over the next few years.
30 November 2008
Cripple Creek and Victor Gold Mine, Colorado Springs
The Cripple Creek and Victor gold mine (CC&V) lies southwest of Colorado Springs in the US state of Colorado. For many y
27 November 2008
Sunrise Dam Gold Mine, Lake Carey, Western Australia
The Sunrise Dam gold mine lies on the eastern shore of Lake Carey in the northern goldfields of Western Australia, some
26 November 2008
Worsley Alumina Refinery – Australia
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5 November 2008
Siguiri Gold Mine, Republic of Guinea, West Africa
The Siguiri gold mine is found within the Siguiri District in the north-east of the Republic of Guinea, West Africa, abo
Platinum Australia Smokey Hills
The Smokey Hills Project is located on the eastern limb of the Bushveld Igneous Complex (BIC) in the Limpopo Province, 3
6 October 2008
Northparkes Copper and Gold Mine – Australia
Northparkes Mines is a copper-gold mine near the remote Australian town of Goonumbla, about 27km north-north-west of Par
27 August 2008
BHP Ravensthorpe Nickel Operation, Australia
The Ravensthorpe Nickel Operation (Australia) was sold by BHP Billiton to First Quantum Minerals Australia on 9 December
13 August 2008
Ridgeway Gold and Copper Mine, New South Wales
The Ridgeway underground mine cave is located in the mineral-rich Cadia Valley province in central New South Wales. A go
Ovoot Tolgoi Coal Mine
The Ovoot Tolgoi mine is in the southwest corner of the Omnigovi Aimag (South Gobi province), within the Gurvantes Soum
13 July 2008
Sabodala Gold Project
Sabodala is located in Senegal, some 650km east of the capital Dakar. The project contains two deposits – Sabodala
San Bartolomé Silver Mine, Potosi
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24 June 2008
Martabe, North Sumatra
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24 April 2008
Orezone/IAMGOLD Essakane Gold Mine
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15 April 2008
Skorpion Zinc Mine
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7 July 2006
Batu Hijau Copper-Gold Mine
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5 October 2004
McArthur River Mine
In 1955, MIM discovered the Here's Your Chance (HYC) zinc-lead-silver deposit on the McArthur River Station, 900km south
26 November 2003
Mount Isa Lead, Zinc and Silver Mine
A 1923 silver-lead ore discovery in Queensland, Australia, lead to the formation of Mount Isa Mines and the development
Mount Isa Copper Mine
Mount Isa Mines (Xstrata 100%) operates two separate mining and processing streams, copper and zinc-lead-silver. Mount I
SNIM Open Pit Iron Ore Mining – Mauritania
Miferma (Mines de Fer de Mauritanie) was created in 1952 to exploit iron ore deposits in the Kedia d'Idjil area of north
22 November 2000
Gold Fields Ltd Gold Mine – Driefontein – South Africa
Driefontein is located in South Africa’s West Wits Line goldfield, about 60km south west of Johannesburg. Driefontein Co
12 June 2000
Gold Fields Ltd Gold Mine – Kloof – South Africa
The Kloof gold mine lies approximately 60km south west of Johannesburg and 20km from Carletonville, on the border of Gau
Boliden Zinc, Copper, Gold and Silver Mine
The Myra Falls mines are located in the Strathcona provincial park in the Myra Valley on Vancouver Island, British Colum
Placer Dome Gold Mine – Musselwhite – North West Ontario
Located 500km north of Thunder Bay in northwestern Ontario, Musselwhite was brought on stream in 1997 by a joint venture
3 April 2000
Stillwater Mining Company Platinum and Palladium Mine
The Stillwater platinum / palladium mine is in the Beartooth Mountains, 130km southwest of Billings, Montana, USA. It is
Boliden Copper Mine, Aitik, Sweden
Aitik copper mine is one of four mines owned by Boliden. Located near Gallivare, northern Sweden, the low-grade Aitik co
27 March 2000
Boliden Mining Company Gold Mines
In 1924, the Holmtjarn gold deposit was discovered at Boliden, near Skelleftea in northern Sweden. Soon after, the Bolid
Lihir Gold Mine, Lihir Island, Papua New Guinea
The Lihir gold mine is on the island of Lihir, in Papua New Guinea's (PNG) New Ireland Province, about 700km north east
Anaconda Nickel Ltd Nickel and Cobalt Mine
The Murrin Murrin nickel-cobalt project, 60km east of Leonora, was commissioned by Anaconda Nickel Ltd. The project is n
26 March 2000
Placer Dome Copper-Gold Mine – Osborne – Queensland Australia
The Osborne copper-gold mine is located 195km south east of Mount Isa in Queensland, Australia. Run as a fly-in, fly-out
Outokumpu Lead and Zinc Mine – Tara – Eire
Tara lead and zinc mine is located at Navan, County Meath, approximately 50km northwest of Dublin. The mine opened in 19
Gold Mine – Zarafshan-Newmont – Uzbekistan
Newmont Mining's announcement in July 2007 of an agreement which was to see it receive US$80m from the government of
North Ltd Zinc, Lead and Silver Mine
Exploiting a zinc-lead-silver orebody near Åkersund on Sweden's Lake Vättern, Zinkgruvan started underground
Potash Corporation of Saskatchewan Phosphate Mine
The Aurora phosphate operation is located at Lee Creek in Beaufort County, North Carolina, USA. The largest integrated p
22 March 2000
Cannington Silver and Lead Mine, Queensland
The Cannington silver mine is located in north-west Queensland, 200km south east of Mount Isa, near the township of McKi
Ngezi Platinum Group Metals Mine, Zimbabwe
Located about 150km southwest of Harare, Ngezi is Zimbabwe's principal platinum-group metals producer. Operated by Makwi
21 March 2000
Gold Mine – Kanowna Belle – Western Australia
Kanowna Belle gold mine is located some 20km north east of Kalgoorlie. Delta Gold NL and Geopeko Gold discovered the ore
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Regional Offices
Orway Mineral Consultants (WA) Pty Ltd
Level 4, 1 Adelaide Terrace
East Perth
WA 6004
Australia
Orway Mineral Consultants (Canada)
302 -5060 Spectrum Way
Mississauga
ON L4W 5N5
Canada
