Diaphragm Pump Applications in the Mining Industry

Core Advantages of Diaphragm Pumps for Mining

• Leak-Free & Strong Isolation: The diaphragm completely separates the medium from the drive mechanism, eliminating leakage and adapting to corrosive media such as acids, alkalis, and heavy metals.
• Wear Resistance & Anti-Clogging: Capable of transporting high-concentration ore slurry/tailings slurry with a solid content of up to 80%, tolerating large particles (1–10mm) without easy clogging.
• Explosion-Proof & Safe: Pneumatic diaphragm pumps produce no electric sparks, meeting the explosion-proof requirements for gas and coal dust in underground coal mines.
• Self-Priming & Dry-Running: Excellent self-priming capacity (up to 7m), capable of dry running and submersible operation, no need for priming, suitable for sump pumping and emergency drainage.
• Easy Maintenance: Few wearing parts (diaphragms, valve balls), repairable on-site, minimizing downtime losses.
• Long-Distance & High-Pressure: Hydraulic/piston diaphragm pumps can achieve long-distance, high-pressure ore slurry pipeline transportation (tens to hundreds of kilometers), replacing road transportation and significantly reducing costs.

Main Application Scenarios & Working Conditions

1. Metal/Non-Metal Mines: Ore Slurry & Concentrate Transportation

• Concentrator Process: Transportation of raw ore slurry, flotation/magnetic separation concentrates, leachate, and thickener underflow.
• Long-Distance Pipeline Transportation: Long-distance (tens to hundreds of kilometers), high-concentration (60%+) pipeline transportation of iron concentrate, copper concentrate, etc., reducing costs by 50%–60% compared to road transportation.
• Material Adaptation: Pump body/diaphragm materials include rubber, fluororubber, PTFE, tungsten carbide, and ceramics, resistant to acids (pH 2–12) and abrasion.

2. Tailings Treatment: Core Demand Scenario

• Tailings Slurry Transportation: Long-distance transportation of high-concentration, high-abrasion tailings to tailings ponds or backfill areas, with operating costs about30% lower than plunger pumps.
• Filter Press Feeding: High-pressure feeding for plate-and-frame/box filter presses, with pulsed transportation to improve dehydration efficiency.
• Tailings Dry Discharge/Backfill: Transportation of high-concentration tailings slurry to dry storage yards or underground filling, saving water and being environmentally friendly.

3. Coal Mines: Underground Drainage & Coal Washing

• Underground Drainage: Pumping of slag-containing sewage, sump dredging, and sump water in coal mining/roadway excavation areas; BQG pneumatic diaphragm pumps are standard equipment underground.
• Coal Washing Plants: Transportation of coal slime water, chemical addition, filter press feeding, and wastewater treatment; capable of transporting coal slime with a solid content of 80% and resistant to corrosion by coal washing chemicals.
• Gas Extraction: Explosion-proof models are used for gas extraction fluid transportation, featuring wear resistance, maintenance-free operation, and preventing over-limit risks.

4. Hydrometallurgy & Chemical Processes

• Leaching/Extraction/Electrowinning: Transportation of acidic leachate, electrolyte, barren/rich liquor, resistant to strong acids (such as sulfuric acid, hydrochloric acid) and heavy metal ions.
• Chemical Addition: Precise dosing of flotation agents, flocculants, acids, and alkalis, with adjustable flow and stable metering.

5. Underground Emergency & Special Working Conditions

• Emergency Drainage: Rapid pumping during power outages and water inrush accidents; pneumatic drive requires no power supply, complying with mine safety regulations.
• Narrow Spaces: Small size, light weight (23–50kg), no foundation required, movable installation in roadways and excavation faces.
• Gas-Containing Media: Capable of transporting gas-containing and volatile media without cavitation or interruption.

Common Types of Diaphragm Pumps for Mining

Selection & Application Key Points

1. Medium Characteristics: Concentration, particle size, pH, temperature, and corrosiveness → select diaphragm/valve ball materials (rubber, PTFE, tungsten carbide, ceramics).
2. Working Conditions: Flow rate, head, distance, explosion-proof grade, and installation space → select pneumatic/electric/hydraulic type.
3. Maintenance Strategy: Prioritize models with few wearing parts and on-site repairability to reduce downtime losses.
4. Long-Distance Transportation: Prioritize hydraulic/piston diaphragm pumps, combined with pipeline optimization, to achieve leak-free, continuous and stable operation.

Typical Application Value

• Cost Reduction & Efficiency Improvement: Long-distance pipeline transportation reduces costs by 50%–60% compared to road transportation, and maintenance costs are60%+ lower than centrifugal pumps/screw pumps.
• Safety & Environmental Protection: Closed transportation ensures zero leakage, no dust or spillage, meeting the requirements of green mines.
• High Reliability: Continuous operation rate of 95%+, not affected by weather in alpine and remote areas.