Coal Beneficiation

Alfa Laval’s range of equipment and proven expertise help optimize key processes in coal beneficiation and add further security to the storage of mine waste. With our solid-bowl decanter centrifuges installed, you can look forward to recovering and re-using large quantities of process water, which will help cut lifecycle cost, minimize environmental impact, save space and boost capacity as well.

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Robust technology for coal tailings dewatering

  • Excellent output (solids dryness) even in tough conditions
  • Removes need for tailings dams
  • Reduces footprint as well as capital and maintenance costs
  • Contained process resulting in good and safe working conditions
  • Full support from our global sales & service team, even in remote locations
Our solid-liquid separation solutions are an effective, proven, high capacity solution for dewatering coal tailings and mine wastewater. They are also an effective solution for recovery of fine coal from flotation concentrate as well as from lean streams. The dewatering technology produces a cake with up to 70% dry solids by mass, which can then be used for co-disposal with coarse rejects.

Tackling tailings safely and sustainably

Alfa Laval decanter centrifuges are a proven, efficient solution for large-scale dewatering of tailings and removing the finest particles that conventional solids control equipment is unable to deal with. They offer a cost effective, sustainable and, above all, safe solution to manage tailings, acting as a complement to traditional separation systems such as thickeners, sedimentation basins and filters or replacing old systems altogether.

spadeable cake

How the technology works

Alfa Laval P2 and P3 decanter centrifuges are specifically designed to separate mineral ore slurries as well as tailings into solid phase and liquid phase. Separation takes place in a horizontal cylindrical bowl equipped with a screw conveyor. The feed slurry enters into the bowl through a stationary inlet tube and is then smoothly accelerated in the feed zone. Centrifugal forces of up to 3,500 G separate the solid particles from the liquid and 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 gives an axial thrust to the solid particles and the conveyor conveys those particles towards the conical end of the bowl. The solids leave the bowl through the solids discharge openings into the casing whereas the clarified liquid leaves the bowl by flowing over adjustable plate dams or power tubes into the casing.


  • Corto tiempo de amortización
  • Alto grado de sequedad de la torta
  • Gran capacidad de volumen
  • Proceso contenido que resulta en buenas condiciones de trabajo
  • Soporte completo de nuestro equipo de servicio global, incluso en ubicaciones remotas

Oportunidades a lo largo de su proceso

Explore el diagrama de flujo de minería y descubra cómo un decantador centrífugo Alfa Laval puede ayudar a optimizar sus operaciones en diversas áreas de proceso.

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Deshidratación de relaves - Abriendo nuevos caminos en la minería y los minerales



Los decantadores Alfa Laval revolucionan la estrategia de manejo de los relaves de las minas de carbón.

La operación de extracción de carbón de Rix's Creek, parte de Bloomfield Group, se propuso mejorar la gestión de relaves de carbón in situ como parte de su estrategia de sostenibilidad para reducir el consumo de agua y energía y minimizar la huella superficial de los procesos de manejo de residuos.

Después de evaluar varias tecnologías, los ingenieros de Rix's Creek instalaron una centrífuga decantadora Alfa Laval para secar los relaves de carbón.


¿El resultado? Ahorro en gastos de capital, así como, aproximadamente un 90% de recuperación y reutilización del agua de proceso.


Learn more

Read more about the efficiency, practicality and technical details of the Alfa Laval range of solid-bowl decanter centrifuges for the coal mining industry by downloading the brochure.

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Gestión de relaves

Enfrentar el desafío de deshidratación de relaves con las centrífugas decantadoras de Alfa Laval. Ofrecen una solución rentable, sostenible y, sobre todo, segura para gestionar los relaves. Descargue el folleto para leer más sobre nuestros sistemas de separación sólido-líquido más limpios, eficientes y seguros aquí.

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Make sustainable development happen!

If you are looking for ways to increase the efficiency of your coal tailings management and make a meaningful contribution to the global sustainable development goals, contact Alfa Laval today to learn more about our proven and cost efficient solutions.

Man wearing a jacket with Alfa Laval logotype