macraes autoclave gold

macraes autoclave gold

Macraes Operation - OceanaGold

Its annualised gold production is split approximately 75% to open pit production and about 25% underground production. Macraes Operation has celebrated several extraordinary milestones, including pouring five million ounces and having its 10,000 th bar poured, both in 2019.

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macraes gold pressure oxidation - day

The Macraes Process Plant recovers gold by concentrating the metal into a relatively small fraction of flotation concentrate, oxidising the reground concentrate in a pressure oxidation autoclave, washing the oxidised residue and then utilising a carbon-in-leach process to recover gold from the residue.

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The Mining Process - OceanaGold

The main material mined at Macraes is sulfide ore (containing gold particles). SIBX (Sodium Isobutyl Xanthate) is pumped into the slurry and causes the gold particles to bond with the sulphur inside the rock. Air is used to agitate the slurry and float the gold bonded sulphur over the top of

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Macraes Gold Mine, Waitaki District, New Zealand

2020-4-21  Macraes is an open pit and underground gold mine located on the South Island of New Zealand. It is the largest gold-producing operation in the country. The mine began production in 1990 and has produced more than five million ounces of gold to

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(PDF) Macraes orogenic gold mine, Otago Schist, New

The Hyde-Macraes Shear Zone in southern New Zealand contains the circa 10 million ounce Macraes gold deposit, one of the larger Phanerozoic orogenic gold deposits discovered to date globally.

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Pressure-oxidation autoclave as an analogue for acid ...

2006-5-18  Gold extraction at the Macraes gold mine in New Zealand involves concentration of pyrite and arsenopyrite, oxidation of those sulphides, then cyanidation. The ore concentrate is predominantly Otago Schist host rock (andesitic composition) with up to 15% sulphides. The oxidation step is conducted on ore concentrate slurry in an autoclave at 225°C and 3,800 kPa oxygen gas pressure with ...

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Pressure-oxidation autoclave as an analogue for acid ...

In order to maximise gold extraction, a pressure oxidation plant was commissioned in 1999 which treated the sulfide concentrate prior to cyanidation (Craw 2003). The concentrate is roasted in an...

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Geochemical changes in mine tailings during a

2003-8-1  The Macraes mine extracts gold from a schist-hosted mesothermal gold vein deposit in southern New Zealand McKeag et al., 1989, Craw et al., 1999, Craw et al., 2002. Gold occurs in close association with pyrite and arsenopyrite, which make up about 1% of the ore. The sulphides are concentrated about 10-fold by flotation after initial crushing.

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HATCH HIGH PRESSURE METALLURGY - AUTOCLAVE

2019-8-8  Oceana Gold Corp. - Overview of the Macraes Pressure Oxidation Circuit Orano Canada Inc. - Leach Cooling and Level Control in a Novel Leach Circuit JSC Polymetal Engineering - AMURSK POX 2 - A New High Temperature Autoclave for Processing of Double Refractory Gold Concentrates 15:30 30 16:00 Afternoon Break Afternoon Break Afternoon Break

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OceanaGold Macraes Operation - Posts Facebook

OceanaGold Macraes Operation, Macraes Flat, New Zealand. 1,804 likes 81 talking about this. The Macraes Operation on the South Island of New Zealand is the country’s largest gold producing mine...

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Pressure-oxidation autoclave as an analogue for acid ...

Gold extraction at the Macraes gold mine in New Zealand involves concentration of pyrite and arsenopyrite, oxidation of those sulphides, then cyanidation. The ore concentrate is predominantly Otago Schist host rock (andesitic composition) with up to 15% sulphides. The oxidation step is conducted on ore concentrate slurry in an autoclave at 225°C and 3,800 kPa oxygen gas pressure with ...

Read More
macraes gold pressure oxidation - day

The Macraes Process Plant recovers gold by concentrating the metal into a relatively small fraction of flotation concentrate, oxidising the reground concentrate in a pressure oxidation autoclave, washing the oxidised residue and then utilising a carbon-in-leach process to recover gold from the residue.

Read More
Pressure-oxidation autoclave as an analogue for acid ...

Macraes tailings waters have high As (up to 3 mg/L) but negligible Sb (Tailings from this process have up to 3 wt% Sb, dispersed through As-rich iron oxyhydroxides that are formed in the autoclave.

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Mining, Processing and Environment at Macraes

Ore mined at Macraes is processed to produce a sulphide mineral rich concentrate, which was originally finely ground and then cyanided to extract the gold. Refractory ore, mainly sheared micaceous schist, yielded recoveries below 50 % of the gold. Ore consisting of graphitic sheared schist is preg-robbing, and gold recovery was also low.

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Geochemical changes in mine tailings during a

2003-8-1  The Macraes mine extracts gold from a schist-hosted mesothermal gold vein deposit in southern New Zealand McKeag et al., 1989, Craw et al., 1999, Craw et al., 2002. Gold occurs in close association with pyrite and arsenopyrite, which make up about 1% of the ore. The sulphides are concentrated about 10-fold by flotation after initial crushing.

Read More
Macraes Operation - ASX

2015-3-15  Macraes Open Pit Large open pit operation since 1990. Eleven pits mined to date. Production at Macraes will be steady in 2015, lower in Q1 vs Q4/14 New TSF commissioned in 2014 Commenced mining new Coronation pit in September 2014. Mine Type Open Pit Resources1 Gold (Moz) 3.15 Reserves1 Gold (Moz) 1.23 Estimated Mine Life ~2017

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HATCH HIGH PRESSURE METALLURGY - AUTOCLAVE

2019-8-8  Oceana Gold Corp. - Overview of the Macraes Pressure Oxidation Circuit Orano Canada Inc. - Leach Cooling and Level Control in a Novel Leach Circuit JSC Polymetal Engineering - AMURSK POX 2 - A New High Temperature Autoclave for Processing of Double Refractory Gold Concentrates 15:30 30 16:00 Afternoon Break Afternoon Break Afternoon Break

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PPi Autoclaves – POX / HPAL Process Plants

2021-5-7  PPi hand-picks the appropriate team to work with clients anywhere in the world. We know the harsh highlands of Porgera PNG, the coastal waters of Lihir PNG, the winters of Macraes NZ and the red dust of Murrin Murrin. And we enjoy a challenge. Read more here

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OceanaGold Macraes Operation - Posts Facebook

OceanaGold Macraes Operation, Macraes Flat, New Zealand. 1,804 likes 81 talking about this. The Macraes Operation on the South Island of New Zealand is the country’s largest gold producing mine...

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OceanaGold Macraes Operation - facebook

We’re committed to doing our part in protecting the health, safety and wellbeing of our workforce and the communities where we live and work. That means over the next four weeks a skeleton crew will...

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Macraes Gold Project – Creating Value with

Since its inception in 1990, improved metallurgical processing technologies, coupled with mine planning enhancements and improved geological knowledge, have sequentially enabled better efficiencies and economies of scale at the Macraes Gold Project. Over a period of 11 years, processing enhancements have been achieved by: increasing mill throughput, from one million tonnes per year, to...

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Mine Details MiningLink.au

The Macraes open pit gold mine is located 100 kilometres north of Dunedin in the Otago Region on the South Island of New Zealand. It is the largest operating gold mine in New Zealand and is both owned and operated by international gold mining company, OceanaGold Corporation.

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Macraes Operation - ASX

2015-3-15  Macraes Open Pit Large open pit operation since 1990. Eleven pits mined to date. Production at Macraes will be steady in 2015, lower in Q1 vs Q4/14 New TSF commissioned in 2014 Commenced mining new Coronation pit in September 2014. Mine Type Open Pit Resources1 Gold (Moz) 3.15 Reserves1 Gold (Moz) 1.23 Estimated Mine Life ~2017

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0978110562 R005 Tailing Assessment v2

The Oceana Gold (New Zealand) Limited (OceanaGold) Macraes Gold Project (MGP) is New Zealand’s largest gold producing operation, with over three million ounces of gold produced since 1990 (OceanaGold, 2010). It is located in the historic Macraes Goldfield, approximately 80 km north of Dunedin and 30 km to the

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HATCH HIGH PRESSURE METALLURGY - AUTOCLAVE

2019-8-8  Oceana Gold Corp. - Overview of the Macraes Pressure Oxidation Circuit Orano Canada Inc. - Leach Cooling and Level Control in a Novel Leach Circuit JSC Polymetal Engineering - AMURSK POX 2 - A New High Temperature Autoclave for Processing of Double Refractory Gold Concentrates 15:30 30 16:00 Afternoon Break Afternoon Break Afternoon Break

Read More
PPi Autoclaves – POX / HPAL Process Plants

2021-5-7  PPi hand-picks the appropriate team to work with clients anywhere in the world. We know the harsh highlands of Porgera PNG, the coastal waters of Lihir PNG, the winters of Macraes NZ and the red dust of Murrin Murrin. And we enjoy a challenge. Read more here

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J - Careers - OceanaGold

OceanaGold is a multinational gold producer committed to the highest standards of technical, environmental and social performance. For 30 years, we have been contributing to excellence in our industry by delivering sustainable environmental and social outcomes for our communities, and strong returns for our shareholders. Our global exploration, development, and operating experience has

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HATCH HIGH PRESSURE METALLURGY - AUTOCLAVE

2019-6-17  Autoclave Throughput Increase by Condensing Steam in the Head Space Novagold Resources Inc. - Donlin Gold Project – Remote Locations and Community Relations in Project Development 11:00; 30 11:30; Agnico-Eagle Mines Ltd. - Kittila Operations: Spring 2018 Autoclave Complete Re-line Hatch - Why Materials Testing Matters in Autoclave Engineering

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OceanaGold Macraes Operation - Posts Facebook

OceanaGold Macraes Operation, Macraes Flat, New Zealand. 1,804 likes 81 talking about this. The Macraes Operation on the South Island of New Zealand is the country’s largest gold producing mine...

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OceanaGold Macraes Operation - facebook

We’re committed to doing our part in protecting the health, safety and wellbeing of our workforce and the communities where we live and work. That means over the next four weeks a skeleton crew will...

Read More