Slurry is one of the most challenging fluids to move. Slurry can be defined as a mixture of fluid, water and a pulverised solid. Slurries are similar in nature to viscous liquids in that they flow with gravity, but pump as needed. They are one of the more challenging fluids to transport due to their thick, abrasive and sometimes corrosive nature. There are a few considerations when specifying a slurry pump.
The Kind Of Slurry
Generally Slurries can be divided into settling and non-settling. A ‘settling’ slurry is often formed of coarse particles that can form an unstable mixture. They have high wearing properties and special consideration should be taken on the flow rate and power used. A Non-Settling is made up of very-fine particles and although is less wearing in nature, does not behave in the same manner as a liquid.
When working with Slurry, it’s often difficult to find that sweet spot when it comes to speed. You want to run as slow as possible in order to reduce wear and extend the part life, but fast enough to keep any of the solids from settling and clogging the lines.
Another consideration to reduce wear is to keep discharge pressure as low as possible. It’s important to ensure a constant and uniform delivery of the material to the pump.
Although many different categories of pumps are used for Slurry, the most common are centrifugal pumps. Slurry Pumps are generally larger in size when compared to low-viscosity liquid pumps and require more horse power as they are less efficient. Components must be much more rugged and are often made out of ‘hard’ and ‘exotic’ materials.
Bronte Precision have many years of experience in manufacturing a range of slurry pump components. These include: Casings, Shafts, Seals, Impellors and more. Contact us today for the bespoke machining of your components.