Benefits
Efficiency capture from a one stop shop Optimized total expenditure for the
entire plant life cycle Process guarantees Global service network Experienced staff with
operating plant background
Outotec
®
Gold Processing Solutions
Outotec offers solutions from equipment to complete production plants and a full range of services that are tailor-made to the customer's needs. With expert knowledge in operation and maintenance together with proven technologies and equipment covering the total gold production chain, we are able to reduce process risks and guarantee the optimal technology fit and process results.
[email protected] www.outotec.com
Copyright © 2013 Outotec Oyj. All rights reserved.
Outotec provides leading technologies and services for the sustainable use of Earth’s natural
resources. As the global leader in minerals and metals processing technology, Outotec has developed many breakthrough technologies over the decades. The company also provides innovative solutions for industrial water treatment, the utilization of alternative energy sources and the chemical industry. Outotec shares are listed on NASDAQ OMX Helsinki.
A reliable partner for your
gold operations
Outotec provides the mining and metallurgical industry with advanced solutions for processing a variety of gold ore types ranging from free-milling ores to refractory gold ores. Our process solutions include comminution, flotation, pressure oxidation, roasting, leaching and recovery with analyzers and automation systems. Tailings and effluent treatment are an integral part of our solution offering. Outotec's competitive edge is based on our extensive experience in minerals processing, hydrometallurgy and pyrometallurgy combined with our proven technologies and equipment. In-depth process and plant knowledge make Outotec a unique strategic partner for our customers.
The expertise of two Outotec in-house R&D centers with state-of-the-art laboratories and pilot plants is utilized in designing our process solutions. Outotec's HSC Chemistry® software offers a modern way for
simulating processes by using the data received from test work.
Outotec’s capability to combine process and automation design is vitally important. The provision of process design, plant engineering, equipment, automation and project management from Outotec eliminates expensive and restrictive interfaces during implementation.
Outotec offers:
Innovative and proven technologies Laboratory test programs and
pilot test campaigns
Scoping and feasibility studies Basic and detailed engineering Proprietary, key equipment
and technology supply
Process automation and instrumentation Training, commissioning and
start-up services
Operation and maintenance services Spare parts
Plant audits, retrofits and equipment upgrades
Outotec offers an extensive selection of comminution, flotation and dewatering solutions and equipment with a high level of automation and process control enabling the optimization of gold beneficiation plant performance. Outotec's minerals processing technologies have been developed to provide comminution for various downstream processes and produce concentrates of every category with maximum efficiency. Outotec flotation solutions are always tailored to the customer’s needs to reliably secure high gold recoveries. Outotec's dewatering solutions complement perfectly the total production chain and offer variable options to choose from. The latest proprietary technologies in ore beneficiation includes the Outotec HIGmill™, enabling ultra fine grinding.
Based on our life cycle approach, we are willing to support our customers on an operate and maintain basis. Outotec's know-how and solutions covering the total gold ore beneficiation and processing chain enable us to help you to reduce the environmental burden related to your operations.
Gold ore beneficiation
Due to declining ore grades, future gold processing plants require higher capacities demanding less but larger scale equipment, with a smaller footprint conserving energy, and reducing maintenance and manpower costs.
Outotec equipment for beneficiation: Outotec® autogenous, semi-autogenous,
rod, ball and pebble grinding mills as well as Outotec HIGMill™ for high intensity grinding for fine, ultra fine, and regrind applications Outotec TankCell®, OK and
SkimAir® flotation machines
Outotec OKTOP® conditioner
Outotec® high-rate and paste thickeners
Outotec Larox® filters
Outotec Courier® on-stream XRF and
Outotec PSI® on-line particle size analyzers,
sampling systems and process instrumentation Outotec Proscon® and Outotec® ACT plant
automation and reporting systems
Concentrator and pressure oxidation technology for Petropavlovsk PLC
Outotec recently supplied engineering, process equipment and technology to Petropavlovsk PCL, the second largest gold producer in Russia with assets located in the Far East. Extensive batch and continuous pilot autoclave test work and flowsheet development has been completed by Petropavlovsk in state-of-the-art laboratories in St Petersburg and Blagoveshchensk. Outotec’s engineering expertise and proprietary process equipment were combined together with Pet-ropavlovsk’s process know-how. Outotec’s deliv-ery comprises flotation plant including all pro-cess equipment, instrumentation and propro-cess control system for the Malomir concentrator, as well as the entire pressure oxidation circuit in-cluding all process equipment and process con-trol system for the Pokrovskiy pressure oxidation plant. Both the Malomir concentrator and Pok-rovskiy pressure oxidation plants are currently under construction.
In refractory ores, gold is locked within sulfide minerals making these ores not amenable to conventional cyanide leaching without pre-treatment. Outotec offers two proven pre-treatment options, pressure oxidation and roasting, to convert the refractory or double refractory ores into easily and effectively leachable form.
Outotec supplies process technology and equipment for all process steps in a pressure oxidation (POX) circuit with a high level of automation and process control to optimize plant performance. A typical POX circuit consists of the following main process steps: carbonate removal, chloride removal, pressure oxidation, gas scrubbing, conditioning, solid-liquid separation and neutralization. Outotec's technology packages are delivered as complete functional units integrated into the processing plant.
OKTOP® Pressure Equipment
The autoclave is the heart of the POX circuit. In the autoclave the sulfide mineral matrix is decomposed
Reduced Risk:
One stop shop – from laboratory to operations Process guarantees
Fast supply and installation due to modular design Lifetime partnership
Gold ore pre-treatment
under high temperature and pressure using gaseous oxygen liberating gold for leaching and recovery. Oxygen is a key operating expenditure in the POX plant and Outotec's autoclave mixing technology enables efficient use of oxygen with superior gas-liquid mass transfer. Outotec's autoclave train package includes all main and auxiliary equipment from autoclave feed tanks to flash tanks.
OKTOP® Reactors for carbonate removal,
conditioning and neutralization
OKTOP Reactors are designed using a modular approach. A combination of process, automation and equipment know-how results in minimum lifetime operating costs. This approach provides proven reactor solutions with optimal metallurgical results, availability and fast track delivery and ramp-up.
Outotec Larox® Filtration Plant for
effective chloride washing
The Outotec Larox filtration plant enables maximum chloride washing efficiency with minimum water consumption in applications where chlorides have a negative impact on gold recovery.
The Outotec® High Rate Thickener has pioneered
thickening and clarifying methods around the world and provides a robust and low-cost solution for counter-current decantation of the oxidized slurry.
Outotec® Vent Gas Scrubbers
Outotec's vent gas cleaning technology meets the toughest environmental regulations and captures harmful components from all autoclave exhaust gases.
Outotec is capable of providing complete process solutions for the roasting process with in-house technology for fluidized beds, heat recovery, gas cleaning, sulfuric acid and effluent treatment plants. Fluidized bed roasting is a proven technology with many references covering a wide spectrum of process scenarios. The roasting process for both whole ore and concentrate adds significant benefits to downstream processing.
In roasting, elements posing problems in the leach recovery of gold are either oxidized, including carbon, sulfur, arsenic and antimony, or volatized as in the case with mercury, chlorides and telluride. The roasting process is autothermal, but additional heating is needed for ores with low sulfur and carbon content. The sulfur dioxide created during roasting is further processed from the process gas to sulfuric acid. Off-gas impurities are removed in special Off-gas cleaning steps and hazardous materials are further processed to concentrated products with high stability. Double refractory materials containing both sulfide minerals and organic carbon are especially suitable for roasting. The roasting process can be made in one or two steps depending on the concentrate or ore composition.
for roasting assures that the narrow temperature operation window required for the gold roasting process can be reached. In the case where arsenic or antimony is contained within the concentrate, partial roasting or two stage roasting is realized and arsenic is removed from the solid phase and transferred to the gas phase. Outotec has over 60 years experience in commercialized fluidized bed plants with hundreds of references. Outotec offers well-proven and efficient complete roasting plant solutions including roasting, dedusting, calcine cooling, gas cleaning, effluent treatment and sulfuric acid. Our offering covers everything from laboratory testing to turnkey deliveries and life cycle services.
Outotec equipment offering for roasting: Outotec® FB Roasters
Outotec® CFB Roasters and pre-heaters
Outotec® Dearsenifying Roasters
Waste Heat Recovery systems Outotec® Hot Gas Cleaning systems
Outotec® Wet Gas Cleaning systems
Outotec® Sulfuric Acid Plant
Other key processes and equipment Process automation, instrumentation
Pressure oxidation
Gold leaching and recovery
Following pre-treatment by pressure oxidation or roasting, Outotec can provide both carbon-in-pulp (CIP) and carbon-in-leach (CIL) plants, as well as elution and gold recovery technologies as an integrated gold production solution. Our technology portfolio covers cyanide detoxification and tailings disposal. Using in-house know-how and specialized partners, our services begin with test work enabling delivery of an optimized plant with process guarantees. With a total gold solution from one supplier you will minimize the risks relating to your project and operations.
Gold cyanide leaching and recovery plant
Gold leaching is carried out in dilute alkaline cyanide solution in agitated reactors. Highly efficient OKTOP®
Reactors focus on minimizing carbon attrition and maximizing gold recovery. Outotec takes the agitator and reactor solutions to a new level of pre-designed leaching plant modules improving the efficiency and quality of the customer's project implementation.
Innovative cyanide-free gold recovery
Outotec’s on going proactive development work on novel cyanide-free gold leaching and recov-ery technology is one example of our sustain-able thinking. Based on extensive know-how in chloride leaching, Outotec has developed a new environmentally friendly chloride leaching pro-cess for gold ores and concentrates. The new process combines effective gold leaching with a new type of gold solvent extraction process. Highly oxidizing power in gold leaching provides very fast leaching kinetics and excellent gold recovery. Gold can be extracted from pregnant leach solutions using an Outotec's patented solvent extractant. Pure gold product is precipi-tated directly from the stripping solution. Sol-vent extraction technology enables also direct silver recovery.
Outotec equipment for gold cyanide leaching and recovery:
OKTOP® Reactors and pre-designed
Outotec® Leaching Plant modules
for cyanide leaching Elution plant and gold room Cyanide Destruction plant Outotec® Thickeners and
paste thickeners
Outotec Courier® on-stream
XRF analyzers, sampling systems and process instrumentation
Outotec Proscon® and Outotec® ACT
The effective recovery of gold with minimal water and energy consumption and sustainable disposal of residues is one of the most challenging issues in the gold processing industry. Outotec’s expertise and capability to optimize the total gold production chain includes competitive solutions for water and tailings management. Outotec offers proven tailings thickening and filtration equipment and effluent treatment solutions for water discharges.
Tailings treatment
From conventional to Outotec paste, thickening technology is a modern way to handle and store tailings from gold operations in a more environmentally sustainable way. Compared to traditional dumping, tailings coming from paste thickening contains less water enabling an improved water balance. Outotec has also developed novel filtration solutions for tailings to further improve water re-usage and minimize the tailings disposal area.
After paste thickening, Outotec offers both landfill and backfill solutions for tailings disposal. Our backfill technology allows paste to be stored in the mine either stabilized or dry. Our landfill technology enables stable above ground storage of tailings.
Outotec equipment for tailings treatment plant: Outotec® Thickeners and paste thickeners
Outotec Larox® Filters
Outotec paste plant
Mine backfill and landfill plants
Tailings and effluent treatment
Effluent treatment
Outotec provides tailored water treatment solutions to produce water that meet environmental discharge concepts and maximize water recycling for reuse, while enabling the recovery of valuable elements and reducing water and energy consumption.
With a long tradition in applying and investigating water treatment processes for gold plants, Outotec offers efficient, sustainable and best available process solutions and technologies for the treatment of process and waste water.
Outotec equipment for effluent treatment plant: OKTOP® Reactors
Outotec® Thickeners
Outotec Larox® Filters
Outotec Larox® Filtration Plant
Outotec® VentGas Scrubbers
Outotec Courier® on-stream XRF analyzers,
sampling systems and process instrumentation Outotec Proscon® and Outotec® ACT plant
automation and reporting systems
Outotec gold technologies :
Gold ore beneficiation Comminution Flotation
Thickening and clarification Filtration Pressure oxidation Carbonate removal Chloride removal Pressure oxidation Gas scrubbing Conditioning Gas cleaning Arsenic removal Neutralization Gold roasting
Bubbling and circulating fluidized bed roasting
Two stage dearsenifying roasting Heat recovery system
Fluidized bed cooling Wet gas cleaning
Sulfuric acid technologies Carbon removal
Sulfide removal Arsenic removal Halogen removal
Gold leaching and recovery
Gold cyanide leaching (CIL and CIP) Gold chloride leaching
Elution and gold recovery Gold solvent extraction Gold precipitation technologies Tailings and effluent treatment Paste thickening
Paste filtration
Backfill and landfill technologies Precipitation and ettringite
precipitation technologies for enhanced sulfate and arsenic removal
Cyanide detoxification Analyzers and automation Process automation and
advanced process control On-line particle size analyzers On-line elemental analyzers Image analysis systems
Sampling systems for metallurgical balance accounting
Reporting systems Services
Training, commissioning and start-up services
Operation and maintenance services Spare parts
Plant audits, retrofits and equipment upgrades
