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At the same time, continuing process evaluations had identified that Newmont Gold Company''s pressureoxidation technology held some promise for treatment of Macraes flotation concentrates. A study team, combining Macraes Mining Company and GRD Minproc personnel, was assembled to define future mining and processing options.
Jarosite is one of the principal precipitates from process waters of the pressureoxidation autoclave system at the Macraes gold mine, and this jarosite is discharged with the process waters to a ...
Macraes ore Processed at Nearby Gold Processing Plant Ore from the Macraes operation is processed at the adjacent gold processing plant that incorporates a pressure oxidation plant to processes sulphide ore. This plant is one of only three other such plants in the southern hemisphere.
gold flotation macraes Macraes Operation OceanaGold. Macraes Operation Overview Open Pit and underground operations, with a flotation/POX/CIL processing plant ~ 500 permanent personnel 427 OceanaGold employees; and 73 site based contractors Residential operation: typically within 30 to 70 minutes Company provides
Does Macraes Mine Use A Wash Plant 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 carboninlea Does macraes mine use a wash plant . Get More
Ore coming into the Macraes gold processing plant is subjected to being crushed, a grinding flotation process, fine grinding, pressure oxidation CIL (carboninleach) elution and electro winning before it is smelted. Refactory ore has to be subjected to multistage processing in .
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 ...
While benchmarking is, in theory, a simple process, this paper looks at putting benchmarking into practice by catering for variability in ore and associate processing methods. The unit processes discussed include the comminution circuit, flotation plant, pressure oxidation plant and gold recovery circuits. > Download from the AusIMM
Mar 16, 2015· Macraes and Reefton were prepared by, or under the supervision of, K Madambi. ... pressure oxidation, OK 300m3 float cells, fine grinding with Isa mill and preg ... Refractory gold associated with sulphides Pressure oxidation autoclave (30 bar and 220ºC) was commissioned in 1999
Aug 11, 2016· Craw D (2003) Geochemical changes in mine tailings during a transition to pressure–oxidation process discharge, Macraes Mine, New Zealand. J Geochem Explor 80: 8194 Google Scholar Craw D (2006) Pressureoxidation autoclave as an analogue for acidsulphate alteration in epithermal systems.
May 18, 2006· 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 .
Recovery enhancement at Macraes Gold Project: the choice of pressure oxidation Author La Brooy,, Cadzow, Australian Symposium on Recovery of refractory Gold.
macraes gold processing plant . Macraes Processing Plant pdf – Grinding Mill China. CIM May 2009 IsaMill Article on, Mtpa plant, the gold concentrate is sent. 800 kilometres by rail to the Macraes pressure oxidation plant for final processing. This proved to be more of a .
The study consisted of a Mtpy gold plant consisting of relocating the existing Pressure Oxidation circuit and all new additional equipment as well as a PFS level study into a Mt/y tungsten concentrate plant to process high Scheelite ore. The feasibility study was developed utilising operating costs developed from the mature Macraes gold ...
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 carboninleach process to recover gold from the residue.
Geochemical changes in mine tailings during a transition to pressure–oxidation process discharge, Macraes Mine, New Zealand, J Geochem Expl, 80: 8194 Petrie, B S, Craw, D, Ryan, C G, 2005. Geological controls on refractory ore in an orogenic gold deposit, Macraes mine, New Zealand, Mineralium Deposita, (in press).
Gold''s ongoing Business Improvement program, a concerted effort has been made to focus on operational efficiency. One aspect of this has been the efficient use of energy in the gold recovery process. A benchmarking process has been developed for the Macraes operation that includes comparison with other operating mines and theoretical design.
Pressure Oxidation is a process for extracting gold from refractory ore.. The most common refractory ores are pyrite and arsenopyrite, which are sulfide ores that trap the gold within ores require pretreatment before the gold can be adequately extracted. The pressure oxidation process is used to prepare such ores for conventional gold extraction processes such as cyanidation.
Macraes Gold Mine is located approximately 100km from Dunedin in the Otago region of New ... to concentrate the ore, which is then reground and oxidised in a pressure oxidation autoclave. Gold is extracted from the oxidised residue with a CarbonInLeach process. Overall gold
Oct 12, 2013· OceanaGold Reefton Gold Mine. ... kilometres south to Palmerston from where it is trucked to the Macraes operation for final processing through the autoclave pressure oxidation .
Pressure Oxidation Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores. The main pressure oxidation products from iron sulfide minerals are sulfuric acid (and metal sulfates) and hematite. Depending on the conditions within the autoclave, acid containing iron compounds can be formed.
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 carboninleach process to recover gold from the residue. In detail the plant comprises:
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 carboninleach process to recover gold .
Macraes and Reefton were prepared by, or under the supervision of, K Madambi. ... (pressure oxidation and CIL) 95%, with overall at 81% 80 staff: 4 operating crews with in house maint. ... Refractory gold associated with sulphides Pressure oxidation autoclave (30 bar and 220ºC) was commissioned in 1999
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