Tag Archives: filtration

Zululand Anthracite Colliery commissions Filtaquip filter press at coal operations

Zululand Anthracite Colliery (ZAC) says it has commissioned a new 25 t/h filter press at its coal washing plant, in Emakhalathini, KwaZulu-Natal, South Africa.

The filter press, from South Africa-based Filtaquip, removes slurry from the water used in the coal washing process. It will aid in preventing incidents such as the coal slurry spill, which occurred at ZAC after the end wall at Slurry Pond 3 failed on December 24, 2021, the company noted.

ZAC Engineering Production Superintendent, Howard Atkinson, explained: “The filter press filters slurry-laden water and removes all the ultrafines from the water to enable reclaimed water to be reused in the beneficiation process.”

The filter press plant, which cost R14.5 million ($933,660), was commissioned on May 10, 2022, and was in full production by May 16.

Filtaquip says its filter presses have high pressure technology for up to 21 bar feed pressure; Q-Shift plate movement technology for efficiency; external filtrate discharge; and an automated and maintenance free shaker system.

The conservation, protection and management of water is a top priority for ZAC, it said.

ZAC GM, Wayne Rowe, said: “The principal aim of ZAC’s sustainable water management policy is to minimise and reduce freshwater consumption in all our operations.”

ZAC operates an underground, deep level, narrow seam operation, using both continuous miners and drill and blast mining techniques. ZAC’s current life of mine is up to 2027, but there are undeveloped known resources still to be considered in future, it says.

Metso Outotec integrates tailings and water treatment solutions into one TMS offering

Metso Outotec says is introducing its comprehensive Tailings Management Solutions offering for the sustainable management of mine tailings.

The offering unites products with decades of process expertise and covers tailings thickening and dewatering as well as handling through conveying and dry stacking, it said. In addition, Metso Outotec offers a portfolio of solutions for the treatment of water produced during dewatering, enabling closed water loops while managing the level of impurities within the recycled water.

Dr Piia Suvio, Director, Tailings and Water, Metso Outotec, said: “The rising demand for sustainably mined materials and stricter environmental legislation are pushing the need for more advanced technology for safe processing and storing of the tailings. Water resource efficiency is also becoming more and more important. These factors, combined with the need to capture the full value of ore, for example, by reprocessing the tailings to extract the remaining valuable minerals, lead to a continuously increasing need for sophisticated tailings management solutions.”

Dr Suvio added: “With our extensive process expertise, we can offer cutting-edge technology solutions for any tailings management need to reduce water use, environmental impact, risks, and costs. Together with our customers, we can reshape the future of tailings and drive responsible management practices that help the business and society to prosper,” says Suvio.

Metso Outotec has been involved in the development of tailings management solutions and equipment for over 50 years. Today, a lot of emphasis is put on the design stage, which includes, for example, test work and studies supported by process simulations carried out with the recently launched Metso Outotec Geminex™ digital twin, allowing accurate plant design and sizing.

Metso Outotec’s Tailings Management Solutions consist of a wide range of Planet Positive equipment and feature performance and capacity guarantees:

  • Thickening plant units are based on Metso Outotec IPS, HRT, HCT and PT technologies. The Reactorwell™ feed system and Vane Feedwell™ provide enhanced mixing, dilution, and retention of the feed, maximising flocculant adsorption and aggregate growth. The advanced Metso Outotec control systems, such as the thickener optimiser, help improve the overall performance of the thickening plant unit;
  • Filtration plant units are based on proven FFP or FP-S filtration technology. The Metso Outotec filtration plant unit is specifically designed for high-volume tailings processing, leading to savings in operational and maintenance costs;
  • The company’s extensive conveying and stacking portfolio consists of robust components and is built to last and perform under even the toughest conditions; and
  • Metso Outotec process water recycling plants enable the recovery and reuse of water within the production process with enhanced metal recovery within the flotation circuit.

Metso Outotec says it supports its tailings management portfolio with a full range of parts, inspections, process optimisation and Life Cycle Services.

Metso Outotec adds to Planet Positive range with Activated Carbon filter for battery metals

Metso Outotec is launching the Activated Carbon (AC) filter for, it says, efficient recovery and recycling of valuable battery chemicals.

The energy- and water-efficient AC filter responds to the market’s increasing demand for advanced and sustainable battery metals processing technologies and is part of Metso Outotec’s Planet Positive portfolio, it said.

Planet Positive is Metso Outotec’s all-encompassing approach to sustainability. It covers the environmental, social and financial aspects of sustainability, focusing on the positive impact on the environment and people through further growing its sustainable offering through products that are demonstrably more energy or water efficient than the market standard, or help customers achieve other priorities such as circularity and safety, as well as services that help customers improve their productivity.

Mika Vuorikari, Director of Industrial Filtration at Metso Outotec, said: “This launch will strengthen our capability to serve a large variety of industries and processes. Together with the Dual Media (DM) filter, Metso Outotec now has a complete filtration portfolio for solvent extraction (SX), electrowinning and crystallisation processes. We have strong know-how from the hydrometallurgical industry with more than 50 successful filtration solutions references from SX and crystallisation processes globally.”

The modular AC filtration technology is designed for smaller side streams of copper and other metal-loaded aqueous streams. It is specifically suited for efficient organics removal before the electrowinning and crystallisation processes. The AC filter uses the already proven design and operation philosophy of the Metso Outotec DM filter product family and is suitable for both greenfield and brownfield installations, the company added.

Benefits of the AC filter outlined by Metso Outotec include:

  • Increased end-product yield and quality;
  • Increased recovery and recycling of valuable process chemicals;
  • Cost-effective and modular design;
  • Low energy consumption, due to low pumping pressure;
  • Minimised water consumption with optimised back washing; and
  • Safe to use and operate, due to sealed pressure vessel and piping.

TAKRAF’s first Dry Stack Tailings system commissioned in Brazil

The first DELKOR Dry Stack Tailings (DST) system to be supplied by TAKRAF Group in Brazil is being commissioned for one of the largest steel producers in the Americas, the company says.

The order for the key equipment for the DST system was awarded in January 2019 and was followed shortly by an order being placed for the supply of a TAKRAF stacker.

The project comprises the following equipment to process iron ore tailings:

  • Flocculant plant;
  • Coagulant plant;
  • 35 m diameter DELKOR high rate thickener;
  • 300 sq.m slurry tank with agitator;
  • Four double-stage centrifugal slurry pumps;
  • Four DELKOR overhead beam filter presses (FP OH): 2 m x 2 m plates;
  • Four compressors with tanks (process and instrument air); and
  • Four TAKRAF belt feeders.

As part of the client’s initiative to improve the sustainability of its operations, the DST system is being built to enable the filtering and stacking of tailings as the deposit area of the existing tailings dam reaches full capacity by year-end.

In addition, by removing most of the water present in the tailing slurry, enabling the material to be safely stacked, the client can benefit from a secure and environmentally friendly approach to tailings disposal.

“Not only does it obviate the risk of catastrophic tailings dam failures, but also maximises the water recovered for return to and re-use by the beneficiation plant,” the company said.

DST will be applied following beneficiation to treat the tailings generated during the iron ore concentration process by flotation. The raw tailings slurry will be first fed to the thickener where part of the water is already recovered. In the next process step, more water is recovered by the filter press to achieve a moisture level of about 14% (dry basis), thus creating a dry filter cake ready to be deposited.

DELKOR’s equipment is built to withstand harsh mining environmental conditions, with the filter presses designed as an overhead beam type suitable for the prevailing operational conditions, it said. These require, among other features, large volumes of material to be processed and easy access to the filter plates and filter cloths for maintenance.

In line with DELKOR’s holistic solutions approach, the DST system was designed as a fully-integrated dewatering process through sedimentation and filtration, with the material being tested in the lab prior to sizing the equipment.

Tiago Carvalho, TAKRAF Brazil Managing Director, said: “TAKRAF and DELKOR’s world-leading technology and expertise to offer a complete DST solution, together with our outstanding technical proposal, based on comprehensive DELKOR testing during the bid stage and collaboration with specialised partners, were undoubtedly convincing factors in the project award.

“All colleagues involved in this project should be commended for successfully bringing this important DST reference to commissioning. This project serves to reinforce TAKRAF Group as a leading global solutions provider and we look forward to successfully delivering future DST projects.”

New Ishigaki filter press starts up at Pilbara Minerals’ Pilgangoora operation

Pilbara Minerals Ltd says it has commenced concentrate production from its newly installed filter press at the Pilgan Plant. The development is part of the Plant Improvements Project being undertaken at its 100%-owned Pilgangoora lithium-tantalum operation in Western Australia’s Pilbara region.

The filter press in question is provided by Ishigaki and will handle approximately 1,500 t/d of concentrate, Pilbara Minerals’ Managing Director and CEO, Ken Brinsden, confirmed.

The Pilgan Plant Improvements Project is expected to de-bottleneck the facility to increase plant operating time and throughput, reduce final product moisture (minimising solar drying) and further manage product recovery performance. These improvements are ultimately expected to realise additional production capacity from the facility, and particularly from the fines flotation circuit.

A total of approximately A$22 million ($16 million) of capital will be invested, with the project expected to be fully ramped-up during the December quarter 2021 to 360,000-380,000 t (dry) of spodumene concentrate. When combined with Ngungaju Plant’s ramped-up capacity of 180,000-200,000 t (dry), which is expected from mid-2022, the total annual production capacity across the entire Pilgangoora operation is expected to increase to circa-560,000-580,000 t/y.

Brinsden said the commencement of production from the Pilgan Plant Improvements Project marked another significant and exciting milestone in the rapid growth of the Pilgangoora project.

“The team has done another amazing job in delivering this project on time and in line with budget,” he said. “Keeping it on track, in combination with the restart of the Ngungaju Plant, is testament to the delivery capability of our team – particularly considering that these works were achieved during a period when the resources industry is under considerable pressure in terms of securing people, resources and equipment.”

Metso Outotec introduces new modular filter for battery chemicals sector

Metso Outotec says it is introducing a new modular filter to its Dual Media (DM) filter product family, with the compact Metso Outotec DM1000 polishing filter particularly suitable for removing and recovering organic compounds and solids in small stream feeds in battery chemicals processes.

Thanks to its modular design, the filter is easy to expand also for larger process flows, the company says.

The DM1000 can be used as a traditional electrolyte filter in the extraction processes as well as for feed flow purification before crystallisation in the metal crystallisation processes.

“Since the launch of our first DM filters some years ago, we have delivered almost 50 DM and DM AC filters for hydrometallurgical extraction and crystallisation processes,” Mika Vuorikari, Director of Industrial Filtration at Metso Outotec, says. “We have delivered hundreds of polishing filters to the mining, chemical and hydrometallurgical industries around the world.

“Adding the modular DM1000 filter to our offering caters to the special needs of the rapidly growing battery industry, where sustainable high-quality filtration is needed to ensure increased production capacities and high-quality end products.”

Coming with energy- and water-efficiency benefits, the Metso Outotec DM1000 polishing filter for battery chemicals is part of the company’s Planet Positive offering.

Metso Outotec invests in Lappeenranta filtration technology centre

Metso Outotec is opening a new laser welding unit, customised for demanding production conditions, at its filtration technology centre in Lappeenranta, Finland.

The new laser welding unit will add to the centre’s manufacturing capacity and enable the production of higher-quality welded structures in a safer and more environmentally friendly manner, the company says. The value of the investment is approximately €1 million ($1.2 million).

Markku Teräsvasara, President of Metso Outotec’s Minerals business, says: “Investing in an efficient laser welding unit is one example of our desire to focus on being an industry leader also in filtration technology.

“In Lappeenranta, we produce several types of filters used in demanding industrial applications. We have systematically developed our capabilities in Lappeenranta over the years. Today, the technology centre for solid-liquid separation, which we opened in 2015, serves customers around the world.”

In addition to Lappeenranta, Metso Outotec provides filtration technology to customers worldwide from its Turku and Suzhou facilities in China, Jussi Venäläinen, Vice President of Metso Outotec’s Filtration Business Line says.

“Our filtration equipment is used, for example, in the mining, chemical and food industries,” he says. “All of them require reliable filtration to ensure high quality of their end products.”

Metso Outotec says its filtration technology centre in Lappeenranta plays an important role in the development of industry innovations. In addition to manufacturing, the centre operates a Dewatering Technology Center, which is focused on solid-liquid separation. It also has continuous cooperation with the Lappeenranta-Lahti University of Technology, among others.

Venäläinen added: “We have a long legacy of filtration expertise – our first filters were made as early as the 1930s in Sala, Sweden. Our selection of filtration technologies is the largest in the field, and their energy, emission and water efficiency is in a league of its own.

“Most of the filtration solutions are part of our Planet Positive range of products. Our filters are safe, easy to use, and quick to maintain, and their high level of automation enables continuous optimisation and remote support. We also provide comprehensive filter maintenance, including lifecycle services.”

Metso Outotec has carried out more than 14,000 filtration tests and delivered more than 5,000 filters for various applications worldwide. Most of the filters are sold under the Larox® product name along with Metso Outotec corporate branding.

In Finland, industrial filter production began in 1977 in Lappeenranta under Larox Oy. In 2009, it continued under Outotec (Filters) Oy, and, after the Metso Minerals and Outotec merger, the filtration technology centre became a part of Metso Outotec. The Lappeenranta site employs around 200 people.

Albarrie Tandem filter bags to receive MINExpo airing

Particulate filtration leader, Albarrie, is set to showcase its exclusive Tandem™ Nonwoven Baghouse Filter Bags at MINExpo 2021 in Las Vegas, USA, next month.

The company’s Tandem filter bags are used in some of the largest mining sites, under some of the most demanding conditions all over North America, the company claims, with the bags offering improved operating capabilities and excellent filtration abilities by combining high-performance P84® polyimide fibres with conventional fibres like PPS or polyester.

“The result is a highly efficient baghouse with lower energy requirements and a higher output,” Albarrie says. “This OEM-tested product has good chemical resistance and can withstand high operating temperatures ranging from 260°F (125°C) to 400°F (200°C), making it suitable for many applications.”

MINExpo 2021 is set to run from September 13-15, 2021, at the Las Vegas Convention Center.

Metso Outotec to help Karara Mining expand tailings filtration at iron ore mine

Metso Outotec has signed a contract with Karara Mining Limited for the design of its tailings filtration plant expansion project at its iron ore mine in Western Australia.

This agreement includes the delivery of key filtration and material handling equipment and associated services, with the typical value for an order like this is in the range of €15-20 million ($11-15 million) depending on the scope of delivery. The order has been booked in Minerals’ June quarter 2021 orders received.

Karara produces a premium, high-grade (65-68% Fe) magnetite concentrate at a design production rate of 8 Mt/y, Metso Outotec said. With this expansion, the operation will increase the current tailings filtration capacity from 30,000 t/d to over 45,000 t/d enabling safe and sustainable storage of the process mine waste, with improved utilisation and recovery of water.

Kai Rönnberg, Vice President, Minerals Sales − Asia Pacific, said: “The Karara mine represents one of the largest filtered tailings facilities in the world. We are very proud that Karara Mining Limited has chosen Metso Outotec to deliver the plant design and key equipment in this expansion project. This is a continuation of earlier delivered proprietary key process equipment and long-term on-site maintenance service agreements.”

Metso Outotec’s scope in this expansion will include the Larox® FFP3512 filter press as primary filtration equipment, material handling conveyor systems and peripheral items. Additionally, spare parts and supervisory services will be supplied to support commissioning and plant ramp-up. Delivery will take place during 2022, and the plant is expected to start production late in the December quarter of 2022.

ANDRITZ ups the filtration ante with new ME2500 filter press

ANDRITZ has introduced a new filter press, the ME2500, to complete its range of “proven” A4F and the SE series filter presses for the mining and minerals industry.

The ME2500 is the best-fit for fast processing of tailings (also with high clay content) or mining concentrates like iron, copper, lead or zinc, the company says. The new model has an hourly processing capacity of up to 450 kg/sq.m, a filtration area of up to 840 sq.m, and features chained plates for faster filter cake discharge. These attributes enable the highest throughputs without compromising on safety, while reflecting a customer focus on saving water, ANDRITZ says.

The innovative closure system on the ME2500 largely replaces hydraulic components with electrical ones and further reduces cycle times, thus increasing capacity and operating availability.

“The increased use of electrical components enables highly sustainable operation of the filter press by reducing the amount of hydraulic oil needed, as well as improving safety thanks to more precise control and less reliance on high-pressure lines that are susceptible to leaks,” the company said.

In addition, and to further optimise the productivity of single machines or plants with multiple filter presses, all modules of the ANDRITZ intelligent filter press – controlled by the Metris addIQ control system – are also available for the ME2500 filter press and can be provided with the full range of options. This draws on smart sensors, data analytics and augmented reality, including multiple sensors to allow for online safety monitoring of the plate package and moveable parts.

The company concluded: “The safe disposal of tailings generated by the mining and minerals sector is a significant cost factor for the industry. ANDRITZ is known for its innovative range of overhead and sidebar filter presses that meet the industry’s most stringent requirements with regard to fast cake discharge and saving water and costs. The maintenance-friendly equipment from ANDRITZ is easily upgradeable, with a modular design for customised process solutions.”