In the unforgiving landscape of the global mining and explosives industry, achieving fluid handling mastery in these environments requires more than just a heavy-duty pump.

What is Mine Dewatering?

Mine dewatering is the process of removing excess water from mining areas to ensure safe and efficient mining operations. Water can enter mines through rainfall, underground water sources, drilling activities, or natural seepage. If this water is not managed properly, it can flood working zones, interrupt production, damage equipment, and create unsafe conditions for workers.

In both surface and underground mines, dewatering systems help maintain dry and stable operating conditions for smooth mineral extraction. These systems typically use pumps, pipelines, drainage channels, and collection pits to transfer water containing solids, abrasive particles, sludge, or saline content. Efficient mine dewatering helps improve productivity, reduce operational delays, and support continuous mining performance.

Mine dewatering is an essential process in both underground and surface mining operations. Excess groundwater, saline water, and accumulated process water can severely impact excavation activities, worker safety, and overall productivity. Dewatering systems must therefore operate continuously while handling abrasive particles, suspended solids, and high-pressure conditions.

Why Roto Pumps Are the Right Choice for Mine Dewatering?

Roto's Roto Flex Pump, our flexible shaft series, was purpose-designed for exactly this challenge. These high-pressure progressive cavity pumps can deliver flow at pressures up to 48 bar (696 PSI), eliminating the need to run multiple centrifugal pumps in series to achieve the same dewatering duty. The Halar-coated flexible shaft removes the need for universal cardan joints or gear couplings, which are common wear points in harsh underground environments. Double hard chrome-plated rotors resist abrasion from suspended solids, and tungsten carbide rotor options extend service life further in the most aggressive conditions.

For dewatering applications, the Roto Mining Station provides a complete turnkey system, solids separation tank, belt and pulley drive assembly, and pipework all on a single skid. The solid separation screen filters out large particles before they reach the pump, protecting internal components and downstream equipment. Anti-reversing clutch options and float level switches allow the station to operate reliably with minimal operator intervention, even in continuous multi-shift environments.

Mineral processing is the method used to separate valuable minerals from mined ore and prepare them for further use or refining. Once the ore is extracted from the mine, it passes through different stages such as crushing, grinding, screening, flotation, and thickening. These processes create mixtures of slurry, chemicals, fine particles, and wastewater that need to be transferred efficiently throughout the plant.

Handling mineral slurry can be challenging because the media often contains abrasive solids, thick consistency, and varying flow conditions. To keep operations running smoothly, mining plants require dependable pumping systems that can manage continuous flow without frequent clogging or excessive component wear. Efficient slurry transfer helps improve recovery rates, reduce maintenance interruptions, and support stable plant performance.

Roto Pumps offers advanced pumping solutions designed for demanding mineral processing applications. Roto Progressive Cavity Pumps featuring unique thrush bush joints, roto flexible shaft series pump, mining stations etc provide smooth and controlled transfer of abrasive and high-viscosity media with minimal shear and consistent flow performance. Their rugged construction and wear-resistant design help mining operations achieve higher efficiency, lower downtime, and reliable operation even in harsh processing conditions.

Explosive emulsions are widely used in mining and blasting operations due to their high stability, safety, and efficient blasting performance. These emulsions are typically made by combining oxidizer solutions, oil phases, and other additives to form a thick, viscous, and shear-sensitive mixture. During manufacturing and transfer processes, maintaining the consistency and stability of the emulsion is extremely important for safe and reliable explosive preparation.

Handling explosive emulsions requires pumping systems that can transfer high-viscosity media smoothly without causing separation, excessive shear, or pulsation. The process often involves precise dosing, controlled flow rates, and continuous transfer in cartridge manufacturing units, bulk explosive systems, and mobile mixing equipment. Reliable pumping helps ensure product uniformity, operational safety, and uninterrupted production performance.

Roto Pumps offers specially engineered Progressive Cavity Pumps for explosive emulsion handling applications. Designed for smooth, non-pulsating, and low-shear transfer, these pumps help maintain emulsion integrity while delivering accurate and continuous flow. With rugged construction, dependable performance, and excellent handling of viscous media, Roto Pumps support efficient and safe explosive processing operations in demanding mining environments.

The Challenge of Moving Precious Metal Slurries

Gold processing involves the movement of ore slurries at various stages from raw ore grinding circuits through carbon-in-leach (CIL) and carbon-in-pulp (CIP) processes. These slurries are inherently abrasive, often containing fine quartz particles and coarse solids that cause rapid wear in standard centrifugal pump designs. Flow accuracy also matters: inconsistent delivery rates affect residence times in process tanks and reduce overall gold recovery efficiency.

Roto Progressive Cavity Pumps - Built for Precision Slurry Handling

Roto's progressive cavity pumps maintain a near-constant flow rate regardless of fluctuating discharge pressures, making them well suited for gold slurry transfer where process stability translates directly into recovery performance. The helical rotor-stator geometry creates a sealed cavity that advances fluid smoothly and continuously; there are no pulsing, no surging, and no velocity spikes that would accelerate wear or upset downstream process equipment.

Abrasion-resistant stator elastomers in both natural rubber and nitrile options allow operators to match the pump specification to the specific slurry composition at their site. Where particle hardness is particularly high, tungsten carbide rotor coatings provide an additional layer of protection. The result is a pump that delivers dependable service life without the frequent rebuild cycles associated with centrifugal alternatives in abrasive gold slurry duty.

Copper slurry handling requires pumping systems capable of managing abrasive ore particles, thick slurry concentrations, and demanding transfer distances. Conventional pumps often face rapid wear, inconsistent flow, and efficiency losses when exposed to aggressive copper processing media.

Roto Progressive Cavity Pumps provide an ideal solution for copper slurry applications by delivering smooth, non-pulsating flow with excellent solids-handling capability. Their heavy-duty rotor and stator design ensures reliable transfer of high-density copper slurry while minimizing internal wear and preserving pumping efficiency.

The robust construction of Roto pumps allows them to perform efficiently in harsh mining environments where continuous operation is essential. By reducing clogging risks and maintaining stable process flow, these pumps contribute to improved plant productivity and lower maintenance costs.

Silver mining operations generate slurry mixtures containing mineral particles, process chemicals, and abrasive solids that require controlled and dependable transfer throughout extraction and refining stages. Efficient slurry movement is critical for maintaining process stability and maximizing recovery rates.

Roto Pumps are designed to handle silver mining slurry with excellent flow consistency and low shear pumping action. Their progressive cavity technology enables smooth transfer of highly viscous and abrasive media without causing separation or excessive turbulence within the process line.

The pumps’ wear-resistant components and heavy-duty construction help ensure longer service life in demanding mining conditions. With continuous flow capability and reliable operation, Roto pumps support uninterrupted mineral processing while reducing overall operational downtime.

Precision and Safety in Explosive Emulsion Handling

Ammonium nitrate-based emulsions are the foundation of modern bulk explosive systems. Whether produced at a dedicated manufacturing facility or blended on-site at a Surface Mining System (SMS) unit, the transfer of ammonium nitrate emulsions demands a pump that can deliver precise, pulsation-free flow without generating heat, creating shear degradation, or causing any condition that could compromise the stability of the explosive product.

Oxidizer solutions, primarily ammonium nitrate in water, must be transferred at low internal velocities to avoid shear sensitivity issues. Premix emulsions carry high viscosity and require metered, consistent delivery to maintain accurate product ratios. Final explosive formulations may include solid dopants, raising viscosity further and requiring solid-handling capability alongside shear-sensitivity protection.

Roto Pumps - Trusted by 99% of World’s Explosive Manufacturers

Roto progressive cavity pumps are the industry benchmark for ammonium nitrate emulsion transfer. Their low internal flow velocity eliminates shear-induced degradation of the emulsion matrix, while the non-pulsating delivery ensures that metering ratios remain accurate throughout the transfer cycle. These characteristics are not incidental; they are the direct result of the progressive cavity operating principle, which was selected specifically because it meets the exacting requirements of explosive production.

Roto pumps serve all stages of explosive cartridge manufacturing and bulk emulsion blending: oxidizer transfer, premix emulsion pumping, and final product delivery to cartridge filling or blasthole charging equipment. Our track record with industry leaders and a wide network of regional manufacturers reflects decades of reliable performance in one of the most demanding industrial pumping applications anywhere.

Moving the Fuel Phase with Accuracy and Reliability

Oil phase emulsions form the fuel component of emulsion explosives and must be transferred with the same care and precision as the oxidizer phase. Oil phase media is typically non-explosive in its pre-sensitised state, but it is high in viscosity and sensitive to temperature variation, which can cause significant changes in flow behaviour. Pump performance must remain consistent across this viscosity range to ensure accurate blending ratios and product quality.

Roto Progressive Cavity Pumps for High-Viscosity Fuel Phase Transfer

Roto's progressive cavity pumps handle high-viscosity oil phase emulsions with a smooth, continuous pumping action that is unaffected by moderate viscosity changes caused by ambient temperature fluctuations. The volumetric efficiency of the rotor-stator geometry remains high across a broad viscosity range, making Roto pumps a reliable choice for oil phase transfer in both fixed-plant emulsion manufacturing and truck-mounted Mobile Manufacturing Unit (MMU) systems.

On MMU and SMS trucks, where space is constrained and the drive arrangement must accommodate vehicle-mounted hydraulic motors, Roto provides pump configurations specifically adapted for hydraulic drive. These units deliver the metered, pulsation-free flow needed for accurate site blending while withstanding the vibration and variable duty cycles of vehicle-mounted operation.

Coal mining operations involve the transfer of abrasive slurry, dirty water, sludge, and chemical additives across multiple processing stages. Pumps used in these applications must withstand continuous exposure to solids, corrosive conditions, and varying operating pressures.

Roto Pumps are widely used in coal mining applications due to their ability to handle abrasive and high-solid-content media efficiently. Whether used for slurry transfer, dust suppression systems, stage dewatering, or wastewater handling, Roto Progressive Cavity Pumps deliver smooth and dependable flow performance.

Its robust design, wear-resistant components, and continuous pumping capability help improve reliability in challenging mining environments. By reducing equipment wear and minimizing downtime, Roto pumps support efficient and cost-effective coal mining operations.

Protecting Seals and Sustaining Pump Performance Underground

Gland water supply is a critical ancillary function in underground mining. Many pump sealing arrangements particularly in high-pressure dewatering applications require a continuous supply of clean, pressurised water to flush the gland seal, prevent solid ingress, and maintain the integrity of the sealing face. Without reliable gland water delivery, seal life deteriorates rapidly and pump availability suffers.

Accurate, Reliable Gland Water Delivery with Roto Pumps

Roto progressive cavity pumps are well suited for gland water supply duties because they deliver a constant, accurate flow at the pressures required to overcome the discharge-side conditions of the pump being served. The positive displacement operating principle ensures flow remains stable regardless of fluctuations in system pressure, a characteristic that is important when gland water is being delivered to pumps operating at high differential pressures.

Where multiple pumps require gland water supply, Roto pumps can be configured to serve manifold distribution systems, with flow metered to individual seals through simple downstream controls. The long service life and low maintenance requirements of Roto pumps in this duty reduce the operational burden

on maintenance teams, which is particularly valuable in remote underground locations where access is restricted and component change-outs are time-consuming.