OTE Outotec Industrial Water Treatment Solutions e

Benefits

Minimized capital expenditure through optimized process design

Reduced water consumption and abstraction via treated water recycling

Improved productivity and product quality through secured and clean process water

Improved quality and reduced volume of generated sludge

Reduced chemical usage via efficient process control

Global service

Outotec Industrial water treatment solutions

Outotec industrial water treatment (IWT) provides tailored water treatment solutions to produce water that meets environmental discharge concepts, maximize water recycling for reuse, while enabling recovery of valuable elements and reducing water and energy consumption.

With a long tradition in applying and investigating water treatment processes for mines and metallurgical plants, Outotec now offers efficient, sustainable and best available process solutions and technologies for the treatment of industrial process and wastewaters.

002 Outotec Industrial water treatment solutions

Outotec has a long history in hydrometallurgy and this broad knowhow has now been transferred into the field of industrial water treatment in order to provide customers with solution-driven industrial water treatment processes. Outotec has expertise on the whole mining and metallurgical production chain and life cycle, leading to ability to offer solutions that are based on innovative, sustainable and best available technologies.

Tightening environmental standards, together with reduced water availability leads to the need for efficient water treatment solutions. Outotec strives to build long-term cooperation with the customer in order to ensure that they receive the very best solution for their operating environment. We know that every plant and process has its own process requirements and strive to provide tailored solutions to specific needs.

IWT solutions combine water treatment and wet chemistry

Outotec's approach to industrial water treatment combines expertise relating to water treatment and wet chemistry. Outotec provides world leading industrial and capital water treatment solutions, which are built on using Outotecs existing technologies and proprietary equipment. Outotec technology selection expertise is based on laboratory test programs, conceptual and feasibility studies, basic and details engineering, technology-specific equipment supply, training, erection supervision, start-up assistance, and follow-up and technical support services.

Outotec also offers Operation and Maintenance (O&M) solutions for industrial water treatment plants to optimize the treatment process and improve the plant performance.

Outotec Industrial water treatment solutions 003

Building industrial water treatment solution:

Tailored solution through research and development

Outotecs unique research centers comprise state-of-the-art research facilities capable of piloting plants from bench to industrial scale. Building a process solution usually start with physical modeling of the equipment, which is followed by chemical testing and piloting in laboratory environment. Fluid dynamical analysis and mechanical design finishes off the proprietary equipment design. In line with the results of the equipment design, an efficient and coherent solution combining all the relevant equipment is designed.

The process of finding a suitable solution for a mining and metallurgical water treatment and management related challenge starts with Outotec analyzing and assessing customer and process requirements in order to identify the relevant water treatment and management issues and define targets. Following the analyzes and assessment of the water treatment and/or management case, thorough research is carried out by water experts in order to assess available solutions and discuss their suitability with relevant process experts in order to find the best potential conceptual solutions.

In the next step, process modeling is carried out using Outotec HSC SIM process simulation program in order to see the effects of the suggested concept solution on the whole process flow sheet. The other purpose of the modeling is to optimize, find and evaluate different processing options. When a suitable processing option has been established, laboratory testing can be carried out in order to prove the suitability of the proposed processing option.

Once suitability of the proposed processing option has been proven, technical and economic feasibility of the proposed process concept will be evaluated. The overall aim is to construct the most economically and technologically feasible solution with optimized performance. Depending on the feasibility of the process concept, process engineering can be commenced, which can be followed by equipment investment decision.

Outotec offers: Tailor-made solutions from

technology package to turn key Innovative and proven technologies Laboratory and pilot tests Concept and feasibility studies Basic and details engineering Proprietary and key equipment supply Commissioning and start-up services Spare parts Shutdown maintenance services Process guarantees

Search & find potential solutions

Carry out process modelling

Carry out laboratory testing

Evaluate technical & economic feasibility

Engineering

Construction and delivery

O&M

Identify issues & define targets


Waters and wastewater within mining and metallurgical industries contain elements such as heavy metals (Cu, Fe, Mn, Zn, etc.), arsenic, sulfate, calcium, magnesium, nitrates, solids, salts and acidity, which require treatment prior to discharge to the environment and/or reuse within the processes.

Outotec offers a wide range of effluent treatment and water management solutions for industrial applications. Typical Outotec industrial water treatment solutions include: metal removal and recovery, neutralization, arsenic removal, sulfate removal and oil removal. Other areas where Outotec has compiled solutions and carried out research include: membrane technology, electrochemical water treatment, halide removal, nitrogen and phosphorus treatment, magnesium removal and water reuse and recycling process solutions.

Typical IWT applicationsOutotec industrial water treatment solutions are tailor-made for:

Non Ferrous metal concentrators Gold processing and concentrator plants Non Ferrous smelters and refineries Iron and Steel industry Acid Mine Drainage (AMD) in different mining sectors Oil shale/oil sands Ferro Chrome industry Coal mines and washeries

Treatment of metal containing effluents

When metals enter the treatment process, they are in a stable, dissolved form and are unable to form suspended solids. The goal of metal containing effluent treatment is to adjust the pH via raising the hydroxide ion concentration of the water so that the metals form insoluble precipitates. Once the metals are in solid or insoluble form, they can be easily removed, leaving the water with low metal concentrations.


The degree of precipitation of metal hydroxides relates directly to the hydroxide ion concentrations i.e. pH, but the minimum solubility and the pH required for achieving it varies with the metal species and the precipitation format (type of alkali reagent) in question. Furthermore, co-precipitation and suitable precipitation enhancers can improve the treatment efficiency. A condition for successful precipitation is that the metal salts formed are so insoluble that any residual concentration of dissolved metal ions fulfills the requirements.

The behavior of metals in aqueous solution is controlled by their chemical speciation, i.e. the molecular and ionic species that they form. Metal cations (Mz+) will hydrolyse to form complexes with the hydroxide ion as a function of pH and the forming complexes can be cations, neutral molecules, as well as anions. The different complexes formed are mainly governed by the valence of the metal (Z+) and metal ion concentration in the solution.

Ore and fresh water

Concentrate

Water recycle

Tailings

Tail ings pondWater recycle

Water recycle

Concentrate

Water treatment

Water treatment

Mine

Water recycle

Water treatment

Process effluent

Water treatment

Water treatment

Mine water

Water treatment

Example of concentrator water treatment solution

Arsenic removal from effluent

Arsenic-rich liquids require treatment prior to discharge or reuse as process water. The most typical chemical precipitation As-removal processes include:

Calcium arsenate precipitation (Ca3(AsO4)2) Calcium arsenite precipitation (Ca3(AsO3)2) Basic ferric arsenate

precipitation (FeAsO4*xFe(OH)3) Scorodite precipitation (FeAsO4.2H2O)

Arsenic precipitation with lime is to date perhaps the most straightforward and cost-effective way of removing arsenic from solution. However, the stability of the generated calcium arsenite or arsenate sludges is poor. An effective alternative to lime precipitation is provided by ferric precipitation (Fe2(SO4)3), chemical process that generates ferric arsenate sludges, out of which the crystalline scrorodite or ferric arsenate dihydrate (FeAsO4

.2H2O) is the most stable form. Precipitation of scorodite requires, however, highly controlled process conditions.

Any precipitation-based process will benefit from advanced equipment technology and process design, but best results are achieved using customer and process-tailored equipment and process control, which allow stable, safe, reliable and cost efficient operation of the process.

With correct process design significant benefits are obtained, including:

Lower chemical consumption Less scaling less maintenance Stable pH profile, allowing precipitation reactions

to take place in the reactors and providing stable effluent

High quality sludge with uniform chemical composition long-term safe storage of As residues

High quality solid residue with minimum moisture lower disposal costs and higher water retention

Process effluent with low, residual As- concentrations and low solids carry over


Example of ferric arsenate precipitation solution

Outotec Larox PF

Arsenic stream

Treated water for discharge and re-use

Filtrate water

Air

Iron sulfateLime milk

Ferric arsenate slurry

Ferric arsenate filter cake

Air

Air

Flocculant


The technology package combined with Outotec proprietary equipment ensures smooth process operation by eliminating unnecessary bottlenecks and shutdowns.

Outotec equipment solutions are made to optimize metallurgical results and to ensure reliable operations. Outotec equipment are designed to be the most economical solutions for the entire lifetime of your plant. Furthermore, we can guarantee equipment performance. A complete technology transfer package with proprietary equipment from Outotec ensures that you get a coherent process with a maximal financial return.

Industrial water treatment takes advantage of three separate Outotec proprietary equipment types, namely reactors, thickeners/clarifiers and filters. All of the three different equipment types include several different types. Furthermore Outotec industrial water treatment takes advantage of the Outotec Courier online elemental analyzers for process control within the solutions.

Proprietary equipment within IWT solution

Outotec OKTOP Reactor the best solution for your process

Outotec has been building reactors for various hydrometallurgical applications for more than forty years. We have experience both as technology providers and as plant operators. Outotec has installed hundreds of reactors for leaching, precipitation and metal recovery. Outotec's expertise provides you with superior performance, reliable operation and ease of maintenance in each OKTOP Reactor.

We know that every plant and process is unique, so each OKTOP Reactor is designed for its specific purpose. Process outcome is the guiding principle for reactor design and each reactor is tailored to deliver the best possible yield.

The combination of years of R&D and a wealth of data collected from both our own and customers' plants have enabled Outotec to develop a family of reactors using modular design principles. The result is five series of reactors with modular design, which can be tailored for each individual application.

Modular design enables us to select the optimum reactor solution quickly and effectively. Outotec will provide you with a complete reactor package, with flexibility for you to choose the accessories you need. For us, the reactor is more than just a tank. It is the heart of a successful operation.


After decades of experiments, design work and operational experience, Outotec now presents the OKTOP Reactor Family. The Reactor Family includes several different reactors and the choice will be based on the application in question. The OKTOP Reactors have been successfully applied in solid-liquid, gas-liquid, gas-liquid-solid and liquid-liquid systems for leaching, precipitation, crystallization, oxidation, reduction and solvent extraction.


Outotec Thickening technologies

Outotec is a global leader in the design, fabrication and supply of thickening and clarifying solutions for the waste water treatment industries.

The revolutionary Outotec High Rate Thickener concept has pioneered and redefined the methods of clarification and thickening around the world. With more than 1,400 thickener installations in over 70 countries in the last 20 years alone, Outotec knows how to provide process solutions to enable longer-term cost benefits for thickening and clarification duties and paste applications.

Outotec thickeners include a number of innovative features in their design. Special attention is given to the design of feedwells, rake profiles, drive systems and control strategies to meet the challenge of dewatering materials that are often problematic for normal thickeners. Our experience in testwork, design, operation, installation and service of thickeners and clarifiers is renowned throughout the world and is your guarantee of quality.

Outotec Filtration solutions

Outotec is a leading innovator, developer and supplier of solid-liquid separation products, which are used as a part of the industrial water treatment solutions.

Outotec Larox filters are built to last, delivering maximum production performance, availability and the best process results at the optimum operating cost for a wide range of processes and process environments.

The broad product range includes filters and solutions based on several different filtration principles, variety of sizes, capacities and related services, all performing in the toughest operating conditions.

A wide range of test filtration solutions and high-tech automation systems are also available.

Outotec offers comprehensive Services and Operation & Maintenance solutions for water treatment concepts. A long-term partnership with Outotec ensures that the full value of customers' operations and equipment is realized. Outotec O&M solutions include for example:

Developing the maintenance strategy and annual planning

Process support as well as plant, equipment and field services

Process optimization Water and energy assessments Quality, safety and environmental systems Supply chain management for

spare parts and chemicals Information Technology Management

system, including remote control, monitoring and performance reporting

Outotec life cycle services improve water treatment process performance and guarantee plant availability

In order to guarantee high-level performance, water treatment operation and maintenance concepts are built using a top-down and bottom-up approach, where the customers needs and selected key performance indicators are also considered on a strategic level.

Outotec's global network of service centers is dedicated to providing continuous technical and maintenance support. Outotec service centers offer customers unparalleled access to our broad knowledge base and operational experience.

Water treatment operation and maintenance concepts are generally incorporated into other operational services. This enables a comprehensive tie-in between the core process and the water treatment plant. This arrangement ensures the efficient performance of the core process, while minimizing the cost of water treatment.


[email protected] 2013 Outotec Oyj. All rights reserved.

Finl

and,

Sep

tem

ber

2013

.

Outotec provides leading technologies and services for the sustainable use of Earths 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.

OTE Outotec Industrial Water Treatment Solutions e

Documents

Transcript of OTE Outotec Industrial Water Treatment Solutions e