Weir Minerals Upgrades Warman AH Centrifugal Slurry Pumps

Weir Minerals Upgrades Warman AH Centrifugal Slurry Pumps

The ALPHAFLO A Series is a range of hard metal and elastomer lined centrifugal slurry pumps that are used in a variety of applications.warman ah Suitable for use in single or multistage pump installations, this series features high efficiency and excellent NPSH.warman ah The ALPHAFLO A series is available with a choice of casing materials, impellers and shaft seals to suit specific application requirements. This is a versatile and highly durable pump range that has a maximum pressure of 6900kPa which makes it ideal for use in difficult conditions.

An Indian alumina refinery experienced heavy frothing in their screen underflow duty due to a change in the grade of their bauxite ore.warman ah This caused the existing Warman AH pumps to suffer premature wear in the throatbush area and a drop in flow and vibration levels, which resulted in reduced process production.warman ah

Weir Minerals engineers carried out a detailed analysis of the application and plant, and recommended a throatbush upgrade to the existing pumps.warman ah The WRT throatbush design streamlines the flow from the impeller to the discharge port resulting in improved wear life and hydraulic performance.warman ah The new design also reduces power consumption and increases net positive suction head (NPSH) availability for better slurry handling.

To optimise the design of the throatbush, Weir’s engineers compared actual wear data with Computational Fluid Dynamics (CFD) simulation.warman ah This resulted in the development of a more efficient throatbush design that improves hydraulic performance by 30 to 50%.warman ah This improvement is achieved through the addition of a unique vanelet on the back shroud and the removal of a conventional five-vane slurry pump impeller.

The customer approved the upgrade and the test ran for over a month with great success.warman ah The vibration was reduced to 15 – 16 mm and the flow remained at 280 m3/h, which met the requirements of the mill circuit.warman ah The results were so successful that the customer agreed to upgrade their six existing AH pumps in the screen underflow duty with WRT throatbushs.

As a leader in slurry pumping solutions, Weir Minerals continues to innovate for the benefit of our customers.warman ah In a world where mining operations are becoming increasingly challenging and the need to drive productivity is more important than ever, we believe that our innovative products and services can help you to increase productivity and profitability. With this in mind, we invite you to take advantage of our expert knowledge and experience. Whether you are in need of new equipment or simply looking to improve your current operations, our team of specialists are here to assist you. Our expertise in mining and minerals is unparalleled in the industry, so we are confident that we can provide you with solutions that will deliver your goals. We look forward to hearing from you soon.

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