Metso HP5 Mantle - EC/C/F/MF Cavity - Mn22Cr4/TiC Composite

EC (Extra Coarse): ~2,350–2,450 kg | C (Coarse): ~2,200–2,300 kg | M (Medium): ~2,050–2,150 kg | F (Fine): ~1,950–2,050 kg | EF (Extra Fine): ~1,900–2,000 kg. CRITICAL LIFT PLANNING: The LT500HP onboard crane (typically 10t–12t) CANNOT lift the HP5 Mantle. You MUST have a mobile crane (25t–35t class) or gantry system available for every mantle change. Verify sling/lifting beam SWL rating.

The HP5 head cone has the largest backing volume in the HP Series. You need 90 – 130 liters (24 – 34 gallons) of two-component epoxy backing (Metso KrushMore, ESCOBACK 6000, Copps K-Back). Order a dedicated "HP500 Mantle Backing Kit" (typically 4–6 x 25L pails). Pro Tip: Pre-heat pails to 25–30°C (77–86°F) in cold weather; viscosity is critical for void-free fill on this diameter.

The HP5 uses a Heavy-Duty Hydraulic Lock Nut (typically 2-stage or high-flow single stage). Clean & Inspect: Threads pristine, head cone seat blue-checked (zero high spots). Lubricate: Copper/graphite anti-seize on threads only. Seat: Run nut down until mantle contacts head cone fully (verify with 0.05mm feeler gauge 360°). Pressurize: Apply hydraulic pressure to Metso Spec (Typically 300–350 bar / 4,350–5,075 psi). Do not guess; use calibrated gauge. Lock: Engage mechanical locking set screws/ring per manual. Re-check: Mandatory re-pressure check at 2 hrs, 24 hrs, and 72 hrs. Thermal cycling on 500kW units relaxes the nut significantly.

In SABC circuits, pebbles are round, work-hardened, high-silica (60%+), and feed at high pressure. Standard Mn18Cr2 relies on work-hardening (requires strain), but pebbles "roll/slide" in the upper chamber, causing gouging/embrittlement before hardening. TiC Composite provides instant 550–600 BHN surface hardness via in-situ TiC carbides, resisting gouging and micro-chipping from Day 1. Life increase is typically 2.5x–3.5x, drastically reducing shutdown frequency on the constraint crusher.

Absolutely not. Catastrophic mismatch. Geometry: HP5 has larger diameter, taller chamber, different pivot point, longer parallel zone. CSS Range: HP5 CSS range (e.g., 16–51mm) vs HP4 (13–38mm) – mismatch creates interference or massive ring bounce. Wear Pattern: Immediate "step" wear destroys both liners in < 1 week. Safety: Mismatched gap causes ring bounce, ejecting tramp iron/liner fragments.

1) Feed Distribution (Mobile LT500HP #1 Issue): Side-conveyor feed creates massive bias. Fix: Install/Repair Feed Distributor (Rotating/Static) + Chute Liners. 2) Countershaft Bushing Wear: Excessive eccentric "whip" (radial play > 3–4mm) creates dynamic lift on one side. Fix: Replace bushings before new mantle. 3) Head Cone Damage: Previous liner failure fretted the head seat. Fix: Machine/Blue-match head cone seat prior to install. 4) Loose Hydraulic Nut: Pressure decay allows mantle to "walk". Fix: Strict re-torque schedule (2h/24h/72h).

Do not run to "paper thin". Change at: Parallel zone / Heel thickness < 30–35 mm (1.25–1.4"). CSS drift > 4–6 mm wider than target (loss of reduction control). Throughput drop > 12–15% (profile worn to "hourglass"). Visual: Deep radial cracks in lower 1/3 (thermal fatigue) or gouging > 25mm deep (pebble). Matched Set Rule: On HP5, always change Mantle & Bowl Liner together. Running new Mantle on worn Bowl (or vice versa) destroys the new liner in 30–50% of normal life due to "step" wear profile mismatch.