Difficulties Pumping Heavy Slurry
Slurries are difficult to pump. They’re abrasive, full of solids, highly viscous, and much heavier than water. While pumping any slurry is a challenging endeavor, pumping especially heavy slurry can pose a serious challenge to any seasoned engineer or equipment operator. With heavy slurries, the pumps needed to move them need to be robust enough to handle the much heavier material, thus removing most water pumps from any serious consideration. What’s left are the ultra duty mud and slurry pumps that are specifically designed for the harder to pump, heavier slurries found in many industrial settings such as mining, manufacturing, and construction applications.
Compare Weights of Materials
|Unit of Measure||Type of Material||Weight|
|1 Square Meter||Water||1 metric ton|
|1 Square Meter||Mud||1.73 metric tons|
|1 Square Meter||Sand/Water||1.92 metric tons|
|1 Square Meter||Concrete||2.5 metric tons|
Selecting a Slurry Pump for Heavier Slurries
When pumping heavy, abrasive slurries, ideally you want to run the pump as slow as you can while still keeping critical flow rate, ensuring the sediment and solids do not settle in the pipelines. This can be tricky and requires some pre-planning to get the right pump configuration based on the material that will be pumped. Running the pump more slowly will reduce wear and extend the life of the parts that come into contact with the abrasive material.
The critical flow rate is the transition flow rate between a laminar and a turbulent flow and is calculated based on grain diameter (size of slurry particles), the concentration of solids in the slurry and the pipe diameter. For minimal settlement of sediments, the actual pump flow rate of ‘your’ pump should be higher than the calculated critical flow rate for your application. However, it is important to be careful with the selection of the pump flow rate as the increase in flow rate will increase the wear and tear or abrasion of the pump material and hence reduce the lifetime of the pump. Therefore, the pump flow rate should be optimized for steady performance and extended lifetime.
Selecting a Motor For Heavy Slurry
With heavier materials, the motors driving the pump will be pulling much more power to move the same quantity of a lighter, less dense material. This requires a larger motor and a pump that can handle heavier materials without wearing down. The amount of power a pump requires is calculated from the discharge head, flow rate, and specific gravity of the material to be pumped. It is vital to verify that the power rating of the selected pump is higher than the calculated power required after considering reasonable variations in operating conditions.
Slurry pumps can be powered hydraulically or electrically. While there are pros and cons to each type of motor, one motor may be preferable over another simply due to logistics. At any rate, the motor needs to be matched for the pump and the application for optimal performance.
EDDY Pump – The Best Pump for Heavy Slurries
The EDDY Pump features patented technology that has no critical tolerances between the rotor and volute, allowing for handling a wide variety of solids, with a capacity to handle sizes as large as 12 inches. The open rotor design of the EDDY Pump lets anything which can go through the inlet pass through the discharge without any setbacks or downtime.
At EDDY Pump we are committed to providing best-in-class slurry and sludge pumps to our customers. Each component is thoroughly tested to deliver absolute quality, reliability, and versatility. Our patented pump technology provides us with an exceptional capability to handle heavy slurries in large volumes and high specific gravity in the toughest of conditions.
Order or Get Selection Help
Let our sales or engineering support help in your grit pump and wastewater equipment selection. Call (619) 258-7020