FLSmidth KREBS gMAX 15 Hydrocyclone

The FLSmidth KREBS gMAX 15 Hydrocyclone is a precision classification device engineered for fine particle separation in mineral processing slurry circuits. The gMAX15, with a 15-inch (380mm) cylindrical barrel diameter, occupies the mid-range of the KREBS gMAX series and is optimised for classification duties at cut points between 50 and 200 microns — the separation range critical in ball mill closed-circuit grinding, desliming ahead of flotation, and thickener feed preparation. The gMAX designation indicates FLSmidth's patented vortex finder and cone geometry that produces a sharper separation curve (lower imperfection index) than previous KREBS generations, meaning more valuable mineral reports to the correct product stream and less misplacement reduces mineral losses.

The gMAX15 is manufactured from a range of wear-resistant materials: moulded natural rubber, ceramic alumina, or silicon carbide depending on feed slurry abrasivity and particle hardness. In Saudi phosphate processing at Maaden Phosphate Company's Wa'ad Al-Shamal plant — the world's single largest phosphate mining and processing complex — classification cyclones operating in the phosphate beneficiation circuit face both abrasive silica and reactive phosphate chemistry, making the correct liner material selection critical to achieving acceptable wear life between maintenance shutdowns. The gMAX geometry's reduced internal turbulence also extends liner life compared with conventional hydrocyclone designs.

Maaden Aluminium at Ras Al-Khair uses FLSmidth KREBS classification equipment in its alumina refinery's Bayer process circuit to classify gibbsite crystals and fine alumina trihydrate ahead of precipitation and calcination. Precise cut-point control in these classification steps directly influences alumina product specification and recovery. The gMAX15 allows tight cut-point adjustment through vortex finder length and apex diameter changes without replacing the entire cyclone body — a significant operational advantage in continuous alumina refinery environments where short, scheduled maintenance windows are the norm.

Razz Middle East supplies and supports the complete KREBS gMAX cyclone range in Saudi Arabia, including single-unit replacement supply for existing installations and complete engineered cyclone cluster packages with FLSmidth fabricated feed distributors, overflow launders, and stainless steel or HDPE pipework. Our technical team assists with cut-point modelling, cluster design optimisation, and on-site commissioning across all Saudi mineral processing and chemical process sites.