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Orway Mineral Consultants

Crushing, Grinding and Hydrometallurgy Specialists

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Level 4, 1 Adelaide Terrace,
East Perth,
WA 6004,
Australia
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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.

OMC specialises in sizing all aspects of comminution modelling, hydrometallurgy and site optimisations.
OMC provides detailed information regarding comminution circuits for green-fields and expansion projects.
OMC has built up a highly skilled team that specialises in hydrometallurgy.
Specialising in flow sheet design, crushers and grinding mill selection, OMC was instrumental in the wide acceptance of SAG milling in the Australian mining industry.
A comminution circuit optimisation ordinarily involves a circuit audit and collection of survey data.

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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Carrapateena Copper-Gold Project

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Pilgangoora Lithium-Tantalum Project, Pilbara

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Kiruna Iron Ore Mine, Sweden

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Kibali Gold Mine, Orientale

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Salamanca Uranium Project

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Balama Graphite Project

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Segilola Gold Project

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Selinsing Gold Mine

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Yandal Gold Project

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Mt Todd Gold Project

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Woodlark Gold Project

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Mako Gold Project

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Goulamina Lithium Project

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Aurizona Gold Mine, Maranhao

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Sanbrado Gold Project

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Nolans Neodymium-Praseodymium Project

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Tasiast Gold Mine

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Yaoure Gold Project

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Mount Morgans Gold Project

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Cerro Negro Gold Mine, Santa Cruz

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Nyanzaga Gold Project

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Dalgaranga Gold Project, Murchison

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Dugald River Mine, Queensland

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Mahenge Graphite Project

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Phoenix Gold Project, Red Lake, Ontario

The Phoenix gold project involves the development of an underground mine in the Red Lake district of Ontario, Canada, which is one of the largest gold producing countries in the world.

Montagne d’Or Gold Project

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Copler Sulphide Expansion Project

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Browns Range Rare Earths Project

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Volta Grande Gold Project, Altamira

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Natougou Gold Project

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Damang Gold Mine

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Matilda Gold Project

The Matilda gold project involves combined development of the Regent, the Matilda and Williamson gold mines, as well as deposits at the brownfield Wiluna mine.

Hounde Gold Mine

Houndé gold mine is located 250km south-west of Burkina Faso's capital Ouagadougou in West Africa. It is one of the highest quality development projects in the region.

Karma Gold Mine

The Karma Gold Mine is an open-pit mine located 20km east of Ouahigouya and approximately 185km north-west of Ouagadougou, the capital of Burkina Faso.

Yatela Gold Mine

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Las Lagunas Gold Tailings Project

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Yanfolila Gold Project

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Mara Rosa Gold Project, Goiás

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Meliadine Gold Project, Nunavut

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Black Butte Copper Project, Montana

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Gamsberg–Skorpion Integrated Project

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Rainy River Gold Project, Richardson Township, Ontario

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Wa Gold Project

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NorthMet Project, Minnesota

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Golden Grove Mine

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Hidden Valley Gold-Silver Mine

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Tulu Kapi Gold Project

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Bissett Creek Graphite Mine, Ontario

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Rossing South Uranium Project

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Roy Hill Iron Ore Project, Pilbara

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Tulawaka Gold Mine

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Mbalam Iron Ore Project

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Paracatu Mine

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Lincoln Gold Project, California, US

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Kansanshi Copper Mine

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Akyem Gold Mine

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Cobre Panama Copper Mine

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Agbaou Gold Mine

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Mt Carlton Mine

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Tropicana Gold Project

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Nullagine Gold Mine

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Prominent Hill Gold and Copper Mine

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La Colosa Gold Project

The La Colosa porphyry gold project is located 150km west of Colombia’s capital city, Bogota, in the district of Tolima.

Marikana Platinum Mine, Rustenburg, South Africa

Marikana is located near Rustenburg, about 112km from Johannesburg in South Africa. It is a producer of platinum group minerals (PGMs) and covers an area of 33km2. The mine was commissioned at the end of 2002 with an initial investment of R630m ($61m).

Niobec Niobium Mine, Quebec

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Pueblo Viejo Gold Mine

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Roseby Copper Project, Queensland

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Wiluna Uranium Project, Mid West

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Etango Uranium Project, Erongo

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Buzwagi Gold Mine, Shinyanga

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Marandoo Iron Ore Mine, Pilbara

Marandoo iron ore mine is situated 35km east of Tom Price in the province of Pilbara, in Western Australia. It is 100% owned and operated by Hamersley Iron.

Channar Iron Ore Mine, Pilbara

Channar iron ore mine is situated 17km south-east of Paraburdoo mine in the province of Pilbara, a region in Western Australia.

Wilcherry Hill Iron Ore Mine Project

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Bisha Project

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Plutonic Gold Mine

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Konongo Gold Project

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Sadiola Gold Mine, Mali

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Çöpler Gold Mine, Erzincan

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Jack Hills Iron Ore Project

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Cloud Break Iron Ore Mine

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Ok Tedi Mine, Oceania

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Mineral Ridge Gold Project

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Hassai Gold Mine

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Didipio Gold-Copper Project

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Trekkopje Uranium Mine

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Zondereinde Mine

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Doolgunna Copper-Gold Mine

The Doolgunna copper-gold mine is located in Western Australia, approximately 900km north of Perth and 150km north of Meekatharra in the peak hill mineral field.

Sukari Gold Mine

The Sukari gold project is located in the eastern desert of Egypt, approximately 23km south-west of Marsa Alam, a coa

Ranger Uranium Mine

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Challenger Gold Mine

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Nullagine Iron Ore Project

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Freda Rebecca Gold Mine

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Atlas Wodgina Project

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Copper Mountain Project

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Kittila Gold Mine

The Kittila gold mine is located 900km to the north of Helsinki, Finland, at the Suurikuusikko gold deposit.

Solwara Project

The Solwara 1 project is located in the territorial waters of Papua New Guinea (PNG). Nautilus Minerals Niugini, a subsi

Forrestania Nickel Project

The Forrestania Nickel Project is located 400km east of Perth, in Western Australia. Flying Fox is the first mine to be developed at the project.

Peak Hill Gold Mine

The Peak Hill Gold Mine, located 400km north-west of Sydney, was decommissioned in 2006. The mine occupied about 130ha o

Kalgold Gold Mine

Kalgold mine is an open pit operation owned by South Africa-based Harmony Gold Mining Company Limited. Located 60km so

Ovoot Tolgoi Coal Mine

The Ovoot Tolgoi mine is in the southwest corner of the Omnigovi Aimag (South Gobi province), within the Gurvantes Soum

Sabodala Gold Project

Sabodala is located in Senegal, some 650km east of the capital Dakar. The project contains two deposits – Sabodala

Martabe, North Sumatra

The Martabe Project is located on the western side of Sumatra Island in the North Sumatra province in the sub-district of Batangtoru, Indonesia.

Skorpion Zinc Mine

Inaugurated in September 2003, the Skorpion zinc operation in south-west Namibia comprises an open pit mine, mill and a

Batu Hijau Copper-Gold Mine

Batu Hijau copper-gold mine is located on the Indonesian island of Sumbawa in the province of West Nusa Tenggara, 1,530k

McArthur River Mine

In 1955, MIM discovered the Here's Your Chance (HYC) zinc-lead-silver deposit on the McArthur River Station, 900km south

Gold Mine – Zarafshan-Newmont – Uzbekistan

Newmont Mining's announcement in July 2007 of an agreement which was to see it receive $80m from the government of Uzbekistan to settle the ongoing dispute over the seizure of assets brings to an end the largest direct foreign investment in the country.

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

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