Tag Archives: hydrocyclones

Belzona’s new abrasion-resistant coating to help miners patch up equipment

Equipment maintenance, Mining consumables, Mining maintenance, Mining services, , , , , , , , , , , , , ,

Belzona Polymerics, a provider of high-performance polymeric repair composites and protective coatings, has launched a new product to add to its portfolio of solutions for industrial maintenance.

This new product, Belzona 1818, has been specially formulated for emergency patch repairs in highly abrasive environments typically found in industries such as mining, cement, pulp and paper, and biomass, among others, where equipment is commonly exposed to extensive erosion and abrasion from excavated or processed materials of varying type, size and shape.

What is easily identifiable about this new product is its distinctive blue colour. This vivid blue serves as a good mixing indicator and provides contrast where an application is carried out in poorly lit conditions or against dark background surfaces where the repair area should be easily identifiable, the company says. These conditions can be common in typical industrial applications where Belzona 1818 is likely to be used.

Based on initial research and feedback from engineers in the field, it is envisaged the product will be used on various types of equipment within abrasive environments such as slurry pumps, grinding mills, screw conveyors, chutes and hoppers, hydrocyclones, wear plates, dust extraction pipe work, agitator shafts, hubs and blades.

Belzona 1818 is the newest addition to the highly erosion resistant Belzona 1800 series product range and bridges the gap between surface tolerance, fast cure and high abrasion resistance, the company says. Its fast curing properties means minimal downtime for damaged equipment – so much so that the product can experience full mechanical loading and heavy abrasion just two hours after application, depending on cure temperatures.

“In these abrasive environments, surface preparation can also be an issue and contamination is common, therefore the equipment cannot always be fully cleaned or ideally profiled as required for many repair materials,” Belzona says. “The desire to deal with adverse application conditions creates a need for a not only fast-curing, but also a surface-tolerant material.”

As a result, Belzona 1818 has built-in surface tolerant technology, enabling it to bond onto steel substrates even when surface preparation is minimal or if the substrate is heavily contaminated with oil or water, the company says. The product can also be applied and cured underwater.

Kristine Savicka, Belzona R&D Technician, explains: “Belzona 1818 builds on our knowledge and experience of producing highly abrasion-resistant systems, and combines this technology with our know-how and expertise in producing fast-cure and surface-tolerant products for application in non-ideal conditions. Belzona 1818 offers the high erosion resistance expected of the Belzona 1800 series with added application benefits, offering ease of use and a fast return to service.”

This new product is supplied in 1 kg units where base and solidifier can be combined on a Belzona work surface. Belzona 1818 is easy to mix and apply and offers a good working life (16 minutes at 20°C) while still offering fast cure and a rapid return to service, according to the company. The product is suitable for emergency repairs where downtime must be kept to a minimum and optimal surface preparation cannot be achieved due to accessibility or environmental and application constraints.

Belzona 1818, as with all Belzona products, is made to the highest quality and safety standards and has undergone rigorous performance testing, the company says. Belzona 1818 is user friendly and can be applied without the need for hot work or specialist tools. In addition, it is formulated without solvents and is free from CMR classification and labelling, while maintaining cure speed and performance to give a durable and long-lasting repair.

New Weir Minerals Sand Wash Plant to boost recoveries

Industrial minerals, Mineral processing, Mining equipment, Water management, , , , , , , , , , , , ,

Weir Minerals has released a complete sand wash solution that draws on its long experience in the sand and aggregate industry.

The Weir Minerals Sand Wash Plant comes with Linatex® lining, produces more saleable product than conventional sand screw plants, with fewer moving parts, and has an optimised process that produces a drier, higher-quality product with less fines, according to the company.

The solution has already proven effective at sites like Coimbatore Minerals in Tamil Nadu, India, Weir says, where a custom-built wash plant reduced its total cost of ownership by 51%, while offering a 23% reduction in fines that helped the company consistently meet the industry’s high standards for a saleable product.

Bruce Cooke, Global Product Manager – Sand Wash Plants for Weir, said: “We know the most important thing for quarry operators in washing is recovering as much sand as possible to maximise their sales, which is why we’ve designed an integrated solution for washing their product, with a hydrocyclone which can deliver greater recovery than sand screws. In addition, every component has been selected by our expert engineers for its long-service life, interoperability and ease of maintenance.”

The compact solution features a range of Weir Minerals equipment designed for high efficiency in sand and aggregate applications, including Warman® WGR pumps, Cavex® hydrocyclones, Enduron® dewatering screens, Linatex hoses and Isogate® knife gate valves.

The Warman WGR is a popular pump in the sand extraction industry, according to Weir, combining top of the line hydraulic design with an adjustable impeller, long bearing life and a simplified wet end, making replacement predictable and cost effective.

Precision moulded and lined, Linatex premium rubber is used for wear zones throughout the plant due to its proven wear performance in wet sand applications in operations around the world, Weir said.

Cavex hydrocyclones provide “exceptional classification efficiency” thanks to their unique 360° laminar spiral, delivering more saleable product than a sand screw solution would, the company said. Enduron dewatering screens, meanwhile, reliably separate product with a high degree of efficiency. And, finally, Isogate knife gate valves contribute to the plant’s straightforward maintenance.

Surendra Menon, President, Weir Minerals India, said: “For the new sand wash plant, we focused on making it quick and easy for quarry operators to get up and running. Its straightforward design means it can be assembled in just two days while its compact skids make it easy to drag into any operation.

“Efficient, reliable and easily integrated into flowsheets, we think the plant is a game changer for quarry owners.”

Multotec builds integrity with hydrocyclone solution at Zambia tailings facility

Base metals, Comminution of minerals, Mine operation news, Mineral processing, Mining equipment, Mining services, Water management, , , , ,

An innovative hydrocyclone solution from Multotec is allowing a large Zambian copper mine to develop a safe and cost effective tailings storage facility (TSF), the South Africa based company says.

The TSF faced a number of specific challenges, according to Frikkie Enslin, Senior Applications Engineer responsible for cyclones at Multotec, including its extensive planned capacity and the area’s flat topography. The mine’s process plant pumps some 10,000 m³/h of tailings to the TSF, requiring its final circumference to reach about 19 km.

“The flat area around the mine meant there was no suitable topography to provide a natural dam,” Enslin says. “It was therefore vital to create strong walls to retain the slurry from the plant, so that the integrity of the TSF could be assured.”

Simple gravity separation and sun-drying had proved unable to create material firm enough to constitute walls, according to Multotec. In the early days of the plant’s operation, it was shown material being deposited by means of plain spigoting could still not be walked on even after a month of drying in the sun. By contrast, Multotec’s 250 mm GV hydrocyclones were able to deliver an underflow discharge that could be walked on in just two days, the company said. After a week, the material could withstand the weight of an excavator.

The sheer volume of slurry being pumped into the TSF, however, created its own challenge. The hydrocyclones had initially been mounted on metal cradles, which were inundated within a couple of hours. Extracting the cyclone and cradle from the mud for the next placement was difficult and very time consuming.

“The customer needed a solution that would keep the cyclone above the slurry level for longer, and would be easier to move,” he says. “To do this, we designed a cyclone cradle that could be attached to a long wooden pole, giving much greater height, allowing the customer to leave the cyclones in the same position for a much longer time.”

With Multotec’s experience and facilities for custom design and manufacture, the hydrocyclones were then modified to be lighter. This made them easier to handle and manoeuvre, it said.

“Constructed with a lighter metal, these tailor-made units are industry leaders in terms of being lightweight and are rubber-lined to ensure long wear life,” he said. “We also made some innovative improvements to the vortex finders and the cone sections, which are now metal spun.”

Other changes were made to speed up the changing of a spigot, and the moving of the hydrocyclones from one point on the TSF wall to the next. The design now includes a threaded spigot coupling and quick-release connections on the cyclone.

The solution has been so successful to date that over 250 of Multotec’s modified GV hydrocyclones have been installed.

“Just as we collaborated closely with the customer in developing this solution, so we continue our partnership in monitoring the performance of our hydrocyclones as the project goes on,” Enslin says. “An expert applications engineer from our Johannesburg head office visits the site regularly, while our Zambia office in Chingola offers solid technical and field service support. We don’t just sell process equipment, but rather process solutions.”

Weir Cavex hydrocyclones take a load off at OceanaGold Didipio mine

Base metals, Comminution of minerals, Equipment maintenance, Mine operation news, Mineral processing, Mining equipment, Mining maintenance, Mining services, Precious metals, , , , , , , , , ,

The installation of 19 Cavex® 400CVX10 hydrocyclones at OceanaGold’s Didipio gold and copper mine in the Philippines has led to savings of more than $800,000/y through a dramatic reduction in grinding circuit recirculation, according to Weir Minerals.

The Didipio mine, which employs more than 1,500 workers (drawn predominantly from the local community), has expanded throughput over the last few years in line with its transition from open pit to underground mining. This increased the incumbent cyclones’ feed density beyond what they could effectively manage, leading to a circulating load of up to 700%, according to Weir.

The Cavex 400CVX10 hydrocyclones significantly improved separation efficiency due to their finely tuned spigot liner diameter and the strength and corrosion resistance provided by its cast housing, according to Weir.

Thanks to these qualities, the introduction of the Cavex hydrocyclones reduced the circulating load from 620% to 374%, with the direct savings in power consumption, ball consumption, cyclone and pump maintenance costs exceeding $815,000/y.

Gary Webb, Processing Manager, OceanaGold Didipio project, said: “Having had good performance from Cavex hydrocyclones at our New Zealand sites (Macraes and Waihi), we were confident that retrofitting Cavex hydrocyclone cluster at Didipio, with an increased number of smaller cyclones than we had at the time, would help reduce our problematic circulating load and lever multiple benefits in doing so.

“The changeover to Cavex hydrocyclones has exceeded our expectations, enabling higher throughput and lower consumable costs without being penalised in grind size.”

The performance of Cavex hydrocyclones can be attributed to the 360° laminar spiral inlet geometry design, which provides a natural flow path into the hydrocyclone, Weir said. This shape allows the feed to blend smoothly with rotating slurry inside the chamber, reducing turbulence.

Mike Arakawa, Philippines Country Manager, Weir Minerals, said: “Working with customers across the globe, our expert engineers are constantly looking at how they can maximise separation efficiency, hydraulic capacity and extend the wear life of not just the hydrocyclone, but our customers’ overall processing plants.

“I’m proud of the results we’ve achieved together with OceanaGold. Reduced circulation means reduced power draw, fewer balls consumed and less equipment wear, creating a more sustainable mine.”

Didipio produced 114,985 oz of gold and 14,999 t of copper in 2018, with 120,000-130,000 oz and 14,000-15,000 t of copper slated for 2019.

Multotec to expand Turkey product footprint with Turbo Ltd appointment

Comminution of minerals, Equipment maintenance, Mineral processing, Mining equipment, Mining services, , , , ,

Mineral processing specialist Multotec has appointed Istanbul-based Turbo Ltd as its new agent in Turkey, Bart Malan, Multotec’s International Business Development Manager for Eurasia, confirmed.

Turbo Ltd is active in the mining, metallurgy, construction, petroleum and natural gas sectors, according to Multotec, with a strong focus on aftersales service.

While Multotec is not a newcomer to Turkey, having supplied a range of equipment over the past 19 year, Malan says there is a renewed focus on this region with the intention to expand its product footprint significantly.

“Over the years, Multotec equipment has been installed in the chrome, gold and coal sectors, and, through the appointment of Turbo Ltd, we will be able to extend our reach and include a larger range of proven Multotec solutions to the mining and minerals processing industry in Turkey,” Malan said.

He says Turbo Ltd, a company established 30 years ago, has a strong technical foundation underpinned by the requisite facilities to support its wide customer base.

“Having skilled and qualified engineers, as well as a strong support team and well-resourced technical capability, was a critical consideration when appointing an agent in this important region as this, we believe, is what is required to provide the level of support to Multotec customers,” he says.

“We also plan to collaborate with Turbo Ltd in setting up a fully operational laboratory in Turkey,” he continues. “This will give us the advantage of offering mineral test work and sampling for customers.”

This facility will assist Turbo Ltd in its plant flow designs, supporting customers in maximising the efficiency of their mineral processing operations, according to Malan.

Multotec said: “While Multotec has historically marketed mainly cyclones and spiral concentrators in Turkey, the future will see a growing range of equipment include samplers, screening systems, flotation components, pumps and magnetic separators.”

Malan concluded: “We believe the Turkish market holds considerable potential for Multotec and we will work closely with our new agent to grow our market share.”

MATSA wins quick payback from Weir Cavex hydrocylone installation

Base metals, Comminution of minerals, Mine operation news, Mineral processing, Mining equipment, Mining services, Precious metals, , , , , , , , , , ,

Weir Minerals says the introduction of a Cavex® hydrocyclone cluster at MATSA’s processing plant, in Spain, has delivered payback in just three days.

MATSA is a modern Spanish mining company based in the north of the Iberian Pyrite Belt, a mining district that has been active for more than 2,500 years. The company, owned 50:50 by Trafigura and Mubadala Investment Company, owns and operates three mines in the province of Huelva, Spain: Aguas Teñidas and Magdalena, located in Almonaster la Real, and the Sotiel mine, in Calañas.

The processing plant, in Almonaster, recently went through a €236 million ($266 million) expansion that saw capacity go from 2.2 Mt/y to 4.4-4.7 Mt/y through the addition of a second plant. The plant now has the capacity to treat copper and polymetallic ores through three grinding lines.

Weir Minerals says it has been working with MATSA to optimise its minerals treatment plant’s primary and secondary grinding circuits.

Seda Kahraman, Regional Process Engineer Manager for Weir Minerals, said: “We have been working with MATSA for 12 years and our service team has built a solid partnership with them. We opened a service site close to MATSA and employed a full-time Service Engineer on site to provide adequate support.

“Their success is our success, and working on this particular project was both very challenging and very rewarding. They needed to increase their grinding circuit capacity from 275 t/h to 307 t/h, whilst reducing the quantity of ultrafines in the final overflow of the second hydrocyclone cluster.”

Antonio Gamiz, MATSA Plant Technical Director, said: “To maximise our plant productivity we needed a Cavex hydrocyclone cluster that was specifically designed to our application. This was achieved without an extension of the plant area and with minimal capital expenditure.”

Weir Minerals took a holistic approach to this challenge by first creating a simulation of the entire primary and secondary grinding circuit. This enabled it to visualise how the process should be running, and the most appropriate way to deliver this.

Following the simulation, the best operating conditions were calculated to support the required capacity increase and elimination of slimes, Weir said. This included the ball mills, mill liners and hydrocyclones. Using 3D laser scanner technology, the team at Weir Minerals developed a suitable layout for the equipment, including modification and steel structures.

Kahraman said:“This truly was a turnkey solution; the team had to pull together all their smarts, capabilities and tools to ensure MATSA’s grinding capacity was raised, whilst simultaneously reducing the quantity of ultrafines from their overflow. We achieved this with a range of tools and techniques including engineer design, subcontract management, and manufacturing of steel.”

To deliver the solutions MATSA required, Weir Minerals replaced the primary hydrocyclone cluster, as well as the spare parts on the secondary hydrocyclone cluster; redesigned the steel structure and walkways; installed new hydrocyclone feed pumps and piping configurations, installing and commissioning the entire project, Weir said.

The modification to the steelwork and piping, as well as the assembly of the new three-way Cavex 650CVX hydrocyclone cluster were completed in less than four days without any production interruptions, according to Weir.

Upon analysing samples from various points in the grinding circuit, it was confirmed the feed capacity had successfully increased to 300-307 t/h.

Kahraman said: “In addition to the desired increase in grinding capacity, we also improved circulating load in the primary ball mill and restored the feed pressure to the Cavex hydrocyclones to 85 kPa. We are thrilled that MATSA achieved payback in just three days due to the increase in production by 500 t/d, and achieved additional revenue of €2,751/h.”

Weir Minerals Africa on the Cavex CVXT hydrocyclone

Comminution of minerals, Equipment maintenance, Mineral processing, Mining equipment, , , ,

Weir Minerals Africa says its locally-manufactured Cavex® CVXT tile lined hydrocyclone features unique laminar spiral inlet geometry designed to deliver sharper separation, maximum capacity and longer wear life.

The CVXT tile lined hydrocyclones are available in a large range of sizes to process any feed tonnage requirement, the company said. All components are designed for ease of maintenance and efficient operation, it added.

“This innovative design provides a natural flow path into the cyclone body, allowing the feed stream to blend smoothly with the rotating slurry inside the chamber,” Weir said. The result is greatly reduced turbulence through the whole cyclone, dramatically improving the separation efficiency of the hydrocyclone, according to the company. It is also offers a much longer wear life than conventional involute and tangential feed inlet designs, the company added.

The Cavex® CVXT hydrocyclone can be fitted with an extended barrel which, again, increases efficiency by increasing the residence time in the hydrocyclone. This is especially for use with ores carrying a high content of near-density materials. The hydrocyclone is also available with different overflow configuration options to suit operational needs.

To maintain separate efficiency at different operating yields and spigot sizes, a wide range of vortex finder sizes ranging from 0.4 to 0.5 are available. “These are designed to maintain a strong air-core at the different sizes. The spigot sizes range from normal to extra high capacity to accommodate low yield ores. These can also be manufactured in different material to prolong the hydrocyclone life and efficiency,” Weir said.