Hydrocyclone lining performance depends on matching the material to the ore, slurry, and pressure conditions actually running through the plant, rather than selecting against a generic specification. This guide covers what cut size, or D50, means for hydrocyclone selection, the feed conditions that inform ceramic lining material choice, and the replacement parts and supply options available when specifying a reline. 

What Cut Size (D50) Means for Hydrocyclone Selection 

As general background, the D50 cut point is a standard mineral processing term for the particle size at which a hydrocyclone splits feed evenly, with half reporting to overflow and half to underflow. It is influenced by factors such as feed pressure, cyclone geometry and slurry density. This is general industry terminology rather than an Annexus WA-specific claim, and it sets the context for why feed conditions, not just the lining material, matter when selecting a hydrocyclone lining. 

The Feed Conditions That Inform Lining Material Selection 

Annexus WA selects ceramic lining material based on a defined set of feed and process factors: 

  • Ore type and slurry type 
  • Particle size and angle of impact 
  • pH, temperature and pressure 
  • Direction of travel through the cyclone 
  • The material currently in use 

Working through these factors is how the lining material selection is matched to the application, rather than defaulting to a single standard recommendation across every installation. This same factor-based approach is used across the parts Annexus WA supplies for a hydrocyclone, from the feed chamber through to the splash guard. 

Matching Material Grade to the Application 

Annexus WA offers ceramic hydrocyclone linings as a replacement for traditional rubber linings, across four material options: 

  • Siliconised Silicon Carbide (SiSiC) – the standard, premium option and the most cost effective choice for most applications 
  • Sintered Silicon Carbide (SiC) – suited to higher wear resistance requirements where impact angles and particle sizes are reduced 
  • Alumina 92% (Al2O3) – increased chemical resistance and higher impact toughness 
  • Alumina 99.8% (Al2O3) – a higher purity variant of the same material 

Material selection is based on the feed conditions set out above, rather than a fixed rule for a given hydrocyclone size. 

Why the Housing Matters 

Ceramic hydrocyclone linings from Annexus WA are typically supplied encased in a polyurethane housing. This housing is intended to reduce the gross weight of the replacement part and to protect the ceramic during shipment, handling, and installation. 

Why Ceramic Linings Are Offered as a Rubber Replacement 

Ceramic hydrocyclone linings typically outlast rubber linings by 5 to 10 times, depending on processing conditions and ore type. Further savings come from reduced maintenance costs and downtime and from improved production benefits through consistency in the dimensions of the spigot, cone and vortex finder, compared with a liner that wears unevenly over time. These are the same benefits Annexus WA points to across its ceramic wear lining range more broadly, where ceramic is also offered in place of traditional wear materials. 

The Same Ceramic Range Is Used Across Wear Linings 

The four ceramic materials offered for hydrocyclones, SiSiC, Sintered SiC, and the two alumina grades, are also used across Annexus WA’s broader Wear Linings range for other industrial applications, again typically supplied encased in a polyurethane housing. This means the same material knowledge applied to hydrocyclone linings extends to other wear applications on site. 

Replacement Parts and Supply Options 

Annexus WA supplies replacement parts for the complete hydrocyclone: 

  • Feed chamber 
  • Vortex finder 
  • Cones (upper, middle and lower) 
  • Spigot (apexes) 
  • Splash guard 

Depending on size, these are available as a complete lining set, as sectional pieces, or as a monolithic component, giving flexibility on whether a reline covers the full unit or targets specific wear points. 

Working With Annexus WA Nationally and Internationally 

Annexus WA was established in Wangara, Perth, in 2013, and its stated positioning is Western Australia’s leading supplier of industrial ceramics and fire assay consumables, serving the mining and resources sector both nationally and globally. Annexus WA services customers throughout Africa, Australia, Asia, South East Asia, Europe, North America and South America. Hydrocyclone lining material, housing and replacement part configuration are worked through directly with mining and resources clients across this footprint, rather than applying a single standard recommendation regardless of location or ore body. 

Installation and Maintenance Support 

Hydrocyclones sit within the same mining and resources product category as Wear Linings, grinding media and conveyor belt scrapers on the Annexus WA site, alongside installation and maintenance services offered across that category. This means a hydrocyclone reline can be discussed alongside broader installation or maintenance needs for the same site, rather than being handled as an isolated parts order. 

Getting the Right Lining for Your Ore Body 

The right hydrocyclone lining material depends on your ore body, slurry characteristics and operating parameters rather than a single standard recommendation. Annexus WA works through the feed and process factors set out above directly with mining and resources clients across Australia and internationally, to match lining material, housing and replacement part configuration to the application. Contact our team at solutions@annexuswa.com or on +61 08 9302 2576 to discuss your hydrocyclone’s feed conditions and current lining.