The Alfa Laval range of P2 decanter solid bowl centrifuges provides a cost-effective, high-performance solution for solid-liquid separation of erosive and/or corrosive slurries. Highly flexible in design, they can be used in industries such as mineral processing, pulp and paper, coal tar, steel and chemicals as the wetted parts are made of corrosion-resistant materials.
High recovery of product and valuable raw material in continuous operation
- High capacity on small footprint
- Cost-effective operation – no filter cloth, no vacuum pump
- Low life-cycle cost compared with other technologies
- Low labour cost due to less operator intervention
Available as 2 or 3-phase designs, our P2 decanter centrifuges can be tailored to specific requirements using options such as enhanced wear and corrosion protection and different seals materials. They can also be specially sealed and purged. The bowl and conveying speed, pond depth in the bowl and feed rate are adjustable to support optimum performance. We also cater for Zone 2 as well as Zone 1 with inert gas purging on case-to-case basis.
How it works
Alfa Laval P2 and P3 solid bowl decanter centrifuges are specifically designed to separate mining and mineral slurries, tailings and sludge into a solid phase and liquid phases.
Separation takes place in a horizontal cylindrical bowl equipped with a scroll conveyor. The product is led into the bowl through a stationary inlet tube and is then smoothly accelerated in a full-flow feed zone design. Centrifugal forces of up to 3,500 G make the solids accumulate on the inner surface of the bowl.
The conveyor rotates in the same direction as the bowl, but at a different speed. This moves the solids towards the conical end of the bowl. The solids leave the bowl through the solids discharge openings into the casing.
Separation takes place throughout the length of the cylindrical part of the bowl, and the clarified liquid leaves the bowl by flowing over adjustable plate dams into the casing.
Contact Alfa Laval Australia today to get a quote or find out more about our solid bowl centrifuge trial unit.
A centrifuge trial allows to you determine parameters such as the moisture in the cake, centrate clarity, determine scalable capacity and to see how this technology can work in practice for your specific facility.
Local support for your solid bowl decanter centrifuge
No site is too remote. Our team of experienced service engineers based at our Huntingwood/Sydney Service Centre and around Australia help you ensure that your solid bowl decanter centrifuge is performing at its best, so you can focus on the rest. Alfa Laval Australia is at your service.
Customer Success: Bloomfield Group Rix's Creek
The Rix’s Creek Coal Handling and Preparation Plant (CHPP), part of Australia's Bloomfield Group, set out to improve its onsite coal tailings management as part of its sustainability strategy. Tailings dewatering with Alfa Laval solid bowl centrifuges allows to reduce water and energy consumption and minimize the surface footprint of waste handling processes.
Leading the Industry in Sustainable Tailings Management
Technology / Innovation
Robustly designed, the rotating assembly is supported on a box beam frame with main bearings at both ends. The bowl is driven at the conical end by an electric motor using a V-belt. Wear protection using suitable material of construction is provided on the wear parts.
The bowl, conveyor, casing, inlet tube, outlets and other parts that come into contact with the process media are made of AISI 316 and Duplex stainless steel. Super Duplex stainless steel can be provided on certain sizes.
The P2 decanter centrifuge comes with an Alfa Laval plus control package as standard, pre-installed and factory-tested to make sure you get the most out of your set-up. It also helps minimize costs for installation, commissioning, operation and maintenance.
Read more about how you can benefit from the solid-liquid separation of corrosive and erosive slurries with our P2 decanter solid bowl centrifuge by downloading the product leaflet.
Supporting sustainability goals
The bowl can be equipped with special power plates or tubes that harness and exploit hydraulic energy to reduce overall power consumption. Some of the discharge velocity from the liquid leaving the unit is captured and re-directed to contribute to bowl rotation. This reduces the velocity of the discharged liquid, which in turn reduces overall power requirements. The unique Alfa Laval direct drive system automatically controls the conveying speed to ensure optimum solids dryness, irrespective of acceptable variations in the feed flow.