Process Equipment

Paterson & Cooke’s skills and experience enable us to develop new technology for mining and mineral process applications, as well as design and supply specialised Pilot Plant facilities.

Differential Pressure Density Meter

To effectively control slurry pipeline systems, the density of the slurry has to be known. The typical hurdles in measuring density in slurry pipelines include, but are not limited to, equipment availability due to pipeline size, the hassle of nuclear licenses when nuclear densitometers are used and the measurable density range. The Differential Pressure Density Meter (DPDM) alleviates all of these hurdles as it is available for a wide range of pipe sizes, and pipe liner materials. The DPDM is particularly useful for measuring low slurry densities like thickener feed slurries where nucleonic densitometers do not perform well. Because the DPDM operates without a nuclear source, the need for stringent nuclear licenses and associated requirements is mitigated. The DPDM only requires an inline flow measurement device, like an electromagnetic flow meter, to function.

Dewatering Bin (Patented)

Dewater low density settling slurries fast and effectively.

Many mineral and mining processes transport dilute slurry initially, but then have to deal with the burden of the excess liquid by over sizing downstream process equipment. Dredging or offshore mining operations typically produce a dilute product stream that requires dewatering before introducing it to the process plant.

Paterson & Cooke has developed and patented a coarse solids dewatering bin that separates the solids and liquids from a dilute slurry stream. The size of the separated solid particles can range from fine sand to coarse gravel. The size fraction that reports to the overflow can be adjusted and the coarse fraction reports to the bin underflow. The Dewatering Bin design offers a wet bin storage facility where the settled solids are stored without agitation and extracted when required at a controlled rate and concentration using a custom designed fluidiser.

Compact Splitter (Patented)

Effective splitting and diversion of a slurry stream.

Many mining process require that a slurry feed stream is diverted equally to downstream processes. Typically, a launder will discharge to a central distribution box that splits the flow in several directions. It is difficult to control the flow split after the distributor, as downstream conditions influence the distribution of the flow. To overcome such problems, Paterson & Cooke has developed a Compact Splitter that provides an equal split to outlets. A riser pipe delivers flow to a specially designed pressurised splitter that provides an even distribution of material to each outlet.

Settling Slurry Viscosity Test Rig

Settling slurry rheology measurement made easy.

Slurries that consist of fine heavy particles often behave as non-Newtonian fluids while all particles are in suspension. Such slurries include Ferro Silicon (FeSi) which is used as separation media in Dense Media Separation (DMS) processes. The rheology of such slurries cannot be measured with a Rotational Viscometer (RV) as the slurry behaves as a settling slurry as soon as the fluid stops moving. This phenomenon makes it very difficult to conduct slurry rheology control on DMS processes.

Paterson & Cooke has designed a Settling Slurry Viscosity Test Rig (SSVTR) that ensures the slurry stays in suspension and a standard RV can be used to measure rheology data.

Mobile Metallurgical Sampler

On line efficiency monitoring tool to improve plant performance.

Product recovery is dependent on the efficiency of the mining tools and also the process efficiency of the treatment plant. Loss of valuable product can occur due to inefficient screens (oversize and undersize), poor dense material separation (DMS) or through tailings. Paterson & Cooke has developed a mobile on-line metallurgical sampler to determine the potential loss of valuable material, measure the particle size distribution of dilute process streams or to determine process/screening efficiencies. The Metallurgical Sampler is designed to eliminate the difficulty of getting a representative sample of large flow, low density streams.

Large UCS Test Rig

Testing compressive strength of large concrete cylinders.

Unconfined Compressive Strength (UCS) testing is currently one of the most common test procedures to assess the shear strength of backfill. The strength is typically estimated by casting specimens from a proposed mix design and crushing them in a laboratory while measuring displacement and load. Specimens are typically of smaller sizes, 150 mm in diameter by 300 mm in height, which poses a problem when large aggregate is added to the backfill sample. This is why Paterson & Cooke has designed and built a large UCS test machine able to test specimens up to 300 mm in diameter by 600 mm in height. The larger UCS machine allows the user to test large cylinders containing aggregate up to 75 mm in diameter.


A fluidiser is an apparatus used to extracted saturated solid or thickened material from a storage device such as a wet bin or thickener. Paterson & Cooke supply custom designed fluidisers for client-specific applications. We can also custom-size a unit from our standard range or design a fluidiser from scratch.