1. Vertical Drive Motor: Flange direct coupling drive; V-belt drive optional. Motor is fully isolated from froth slurry for waterproof & dustproof operation.
2. Bearing Assembly: Independent grease-lubricated oil chamber, external grease nipple, isolated from froth vapor for extended bearing service life.
3. Defoaming Feed Hopper (Unique Core Component)
Conical large-volume buffer tank with overflow defoaming structure. Froth flows into the hopper for natural bubble breaking and preliminary gas-liquid separation, eliminating air suction failure common in standard pumps. Hopper inner wall can be lined with wear-resistant rubber.
4. Double Pump Casing: Outer casing bears pressure; replaceable wear liner reduces maintenance cost.
5. Wear-resistant Wetted Parts (Core)
- Wide-open dual-vane impeller with large clearance to prevent mineral jamming and bubble adhesion; auxiliary back vanes release bubble pressure;
- Front liner, back liner, volute liner;
- Material options: High-chromium alloy A05 (coarse abrasive ore slurry), natural rubber lining (fine-grained acidic froth slurry).
6. Base Support Frame: Floor-standing bracket for stable installation without complex concrete foundation.
Key Structural Advantage: Shaft-Seal-Free Option
Heavy-duty KSF froth pumps can be manufactured without packing or mechanical seal, no flushing water required, completely avoiding froth slurry leakage via shaft seal for 24/7 continuous flotation service.
The motor drives wide-open impeller to rotate at high speed; wide flow channels push residual tiny bubbles and mineral particles. Centrifugal force converts kinetic energy into pressure energy, and medium discharges from side outlet.
The dual design of defoaming hopper + wide-channel impeller fundamentally eliminates air binding, maintaining steady flow even under extremely high froth aeration or insufficient feeding conditions.
2. Wide Channel Anti-Clogging: Open impeller prevents blockage by coarse minerals and reagent residues;
3. Small Footprint Vertical Layout: Floor-mounted bracket, no separate pump house needed, easy to connect with flotation cell outlet;
4. Cost-Effective Double Casing: Wear liners replaceable individually without full pump casing replacement;
5. Wide Adaptability to High Froth Content: Handles slurry with 30%–70% gas volume ratio, while standard slurry pumps only tolerate below 10%;
6. Stable Operation: Continuous delivery under fluctuating feed volume and low liquid level without overload tripping;
7. Dual Drive Options: Direct coupling for high flow rate; V-belt drive for adjustable speed in low-flow cleaning flotation.
1. Larger overall size than horizontal slurry pump under equal flow capacity;
2. Coarse minerals tend to accumulate in defoaming hopper, requiring regular cleaning;
3. Not ideal for ultra-high head long-distance transportation (head over 50m).
- Flow rate: 10–1200 m³/h
- Head: 8–45 m
- Allowable froth gas volume ratio: 30%～70%
- Max slurry weight concentration: ≤55%
- Max passable solid particle size: 20 mm (all-metal impeller)
2. Coal Washing Flotation: Coal froth slurry, dense medium flotation pulp;
3. Non-metallic Ore: Fluorite, graphite, quartz flotation froth;
4. Hydrometallurgical Chemicals: Frothing leaching slurry, reagent foaming pulp;
5. Environmental Air Flotation: Frothy sludge transportation for sewage treatment.
| Feed Structure | Equipped with conical defoaming hopper for pre-degassing | No defoaming tank, slurry directly enters impeller |
| Applicable Medium | High-aeration froth slurry, gas ratio 30%-70% | Low/non-froth slurry, gas ratio ＜10% |
| Impeller Type | Wide-open dual-vane impeller with large flow channel | Semi-open narrow-channel impeller |
| Air Binding Risk | Extremely low (pre-defoamed in hopper) | Very high, severe flow drop & dry running |
| Installation Mode | Floor-mounted beside flotation cell | Submerged under liquid surface of slurry tank |
| Typical Application | Froth concentrate delivery in flotation circuit | Bottom sludge pumping for tailings & sediment tanks |
2. Choose high-chromium wetted parts for coarse abrasive metal ore; rubber lining for fine acidic froth;
3. Reserve 20% margin for flow & head, froth medium brings higher pipeline resistance than clean slurry;
4. Direct-coupled motor for limited site space; V-belt drive if adjustable froth flow is required;
5. Select shaft-seal-free KSF model for non-stop 24-hour production to eliminate flushing water pipeline.
2. Refill bearing grease every 500 running hours;
3. Inspect wear of impeller & liners regularly; froth medium accelerates abrasion compared with normal slurry;
4. Adjust V-belt tension periodically for belt-driven models to prevent slipping & flow attenuation;
5. Fully drain slurry from hopper and pump for long-term shutdown, coat anti-rust oil on liners.
