In modern mining operations, efficiency often depends on what happens after the ore has been extracted. Once minerals are crushed, washed and separated, large volumes of slurry, a mixture of water, fine particles and mineral residues, must be managed throughout the process.
These mixtures are far from simple fluids. High densities, abrasive particles and large storage volumes create conditions in which solids tend to settle quickly, forming deposits that can compromise plant performance and increase maintenance costs.
For mining operators, ensuring that slurry remains properly mixed and homogeneous is therefore essential. Effective mixing technology is a key component of modern mining infrastructure, and this is where PRO-DO-MIX® vertical agitators play a crucial role.
The challenges of high-density mining slurry
Mining sludge can reach densities of up to 2 tonnes per cubic metre, depending on the solids concentration and the mineral composition. These are typically conveyed into storage or process tanks that may reach volumes of several hundred cubic metres.
In such conditions, sedimentation becomes a constant operational risk. Heavy particles settle at the bottom while lighter components remain suspended. Over time, these deposits reduce the effective working volume, create dead zones and lead to irregular slurry composition.
This can directly impact downstream operations: pumps may struggle to move the slurry, pipelines can experience uneven loads and processing units may receive material with inconsistent density. Preventing sedimentation is therefore not only a matter of process efficiency but also of equipment reliability and operational continuity.
PRO-DO-MIX® vertical agitators are designed specifically to address these challenges, maintaining continuous circulation within the tank and keeping the solid fraction uniformly distributed.
Vertical agitation for stable slurry management
The most effective way to control sedimentation is through vertical agitators installed directly inside the vessel. They generate controlled mixing that keeps solids suspended and maintains homogeneous slurry conditions.
However, mining environments are particularly demanding for mixing equipment. Agitation takes place in large atmospheric tanks, often operating continuously and sometimes in remote or harsh environments. So, mixing equipment must be engineered for heavy-duty operation capable of running 24 hours a day, 365 days a year, with minimal maintenance.
PRO-DO-MIX® designs its agitators specifically for these demanding conditions, ensuring reliable performance even in high-density slurry applications.
Managing abrasion with the right materials
Mining slurry contains hard mineral particles that generate significant abrasion on mechanical components over time. Mixing equipment must therefore be designed for durability.
PRO-DO-MIX® vertical agitators are typically constructed using AISI 304L stainless steel (ASTM F899 – W.Nr 1.4307 – UNS30400), which offers an excellent balance between corrosion resistance and mechanical strength. Depending on the slurry characteristics, carbon steel configurations may also be adopted.
In more aggressive environments, we apply additional protective treatments, such as ebonite lining, to components exposed to the fluid, increasing durability and extending service life.
High-efficiency impellers for solid suspension
At the heart of every agitation system lies the impeller. For mining applications, the goal is to generate sufficient axial flow to mobilise the entire tank volume while maintaining efficient energy consumption.
PRO-DO-MIX® vertical agitators frequently use the 3PM-0030 high-efficiency impeller (specifically engineered by our R&D department), designed to generate strong axial flow while optimising power demand. In the mining sector, we often provide impellers with increased blade thickness that improves resistance to abrasive wear.
In larger tanks or particularly dense slurry conditions, multiple impellers can be installed along the shaft, distributing mixing energy across the full height of the tank and improving overall performance.
Engineering mixing performance through simulation
Achieving reliable mixing performance in mining tanks requires more than robust mechanical construction. Each installation must be carefully engineered according to slurry characteristics and tank geometry.
To optimize both performance and durability, PRO-DO-MIX® uses advanced engineering tools, such as Computational Fluid Dynamics (CFD) and Finite Element Method (FEM) simulations.
CFD analysis allows engineers to model the internal flow patterns generated by the agitator, ensuring that circulation reaches every area of the tank and eliminating potential dead zones. FEM simulations are used to evaluate mechanical stresses on shafts, impellers and structural components, ensuring the equipment can withstand continuous heavy-duty operation.
This integrated engineering approach guarantees that each agitator delivers optimal mixing performance and long-term reliability.
Reliable mixing for modern mining operations
As mining operations continue growing in scale and complexity, slurry management becomes increasingly important. Sedimentation, uneven density and excessive equipment wear can all affect productivity and operational costs.
By combining high-efficiency impeller technology, robust mechanical construction and advanced engineering design, PRO-DO-MIX® vertical agitators provide mining operators with an efficient and reliable solution for maintaining slurry stability in demanding environments.
In today’s mining industry, effective mixing is no longer just a supporting process. It is a key factor in ensuring operational continuity, improving efficiency and protecting the long-term performance of critical plant infrastructure.
