27 October 2025

HFD Horizontal Froth Pump (Replace AHF): field notes, specs, and what buyers actually ask

If you’ve ever fought with air-lock and surging in flotation circuits, you probably eyed a Horizontal Froth Pump at some point. The HFD model—built in Beisu Industrial Park, Wuji County, Shijiazhuang, Hebei—lands squarely in that sweet spot: tough metallurgy, sane lead times, and, to be honest, a price that doesn’t make maintenance managers wince.

What’s trending in slurry and froth handling

Two clear shifts: plants want higher air handling with fewer choke points, and they want wear life without spares taking months. It seems that mills are standardizing on replaceable liners and oversized inlets to keep froth stable. The HFD Horizontal Froth Pump leans into that, with CR27/CR28 high-chrome, CD4MCu duplex, and rubber liners as options. Surprisingly, more customers are asking for ISO-compliant test data up front—not after purchase.

Core specs at a glance

Range highlights: size 2–14 inches, capacity 0–3151 m³/h, head 0–37 m. Materials: CR27, CR28, CD4MCu, or rubber liner. Real-world duty often runs in the 10–30 m head sweet spot.

Model	Size (in)	Capacity (m³/h)	Head (m)	Materials	Max solids (mm)	Notes
HFD-2	2	0–120 ≈	0–22 ≈	CR27 / Rubber	6–8 ≈	Compact froth duty; real-world use may vary
HFD-6	6	150–900 ≈	10–32 ≈	CR28 / CD4MCu	14–18 ≈	Most flotation circuits
HFD-10	10	800–3151 ≈	8–37 ≈	CR28 / Rubber	22–30 ≈	High-volume froth transfer

Where it’s used

Mineral flotation: copper, gold, phosphates, coal; froth launders to surge tanks
Phosphate/phosphoric acid pre-froth slurries
Pulp and paper de-inking froths
Chemical plants with entrained air slurries

Why plants pick the HFD Horizontal Froth Pump

Degassing/inlet design resists air-lock and keeps NPSH headaches down
Interchangeability with “AHF” patterns cuts retraining and spares complexity
Metallurgy choice: CR27/CR28 for abrasion, CD4MCu for corrosion, rubber for mixed duties
Maintenance: split casing, cartridge bearing assembly, simple impeller clearance

How it’s built and proven

Materials are poured and heat-treated in Shijiazhuang with spectro verification (per heat). Machining includes dynamic balancing to ISO 1940-1 G6.3. Hydrostatic test is typically 1.5× rated pressure; performance tested to ISO 9906 Grade 2B. We benchmarked service life in copper froth at 10–16 months on CR28 volutes; rubber liners lasted ≈8–12 months where silica spikes were lower. Bearings are greased for heavy duty; optional oil bath on larger frames.

Vendor snapshot (real-world buyer view)

Vendor	Froth design	Wear materials	Lead time	Cost level
Kingmech HFD Horizontal Froth Pump	Open inlet, foam-breaking hopper	CR27/CR28, CD4MCu, Rubber	4–10 weeks ≈	$$ (value)
Weir Warman AHF	Proven froth throat/impeller	High-chrome, Rubber	8–16 weeks ≈	$$$
Metso Outotec	Air-handling impeller/volute	HC alloys, Elastomers	6–14 weeks ≈	$$$

Indicative only; site, region, and configuration will change outcomes.

Customization and compliance

Elastomer vs. metal liners; CD4MCu for chloride-rich circuits
Shaft sealing: expeller (preferred for froth), packed gland, or mechanical seal
Baseplates and motor frames per IEC/NEMA
Testing per ISO 9906; design alignment to ISO 5199; CE marking; ATEX on request

Field snapshot

At a Latin American copper concentrator, swapping two legacy froth pumps for HFD-6 units cut air-lock incidents by roughly 60% and boosted steady-state flow from ≈520 to 580 m³/h. Maintenance reported faster liner swaps (under 3 hours). One foreman told me, “It just doesn’t burp the line like before.” I guess that’s the point.