Page 87 - HUB-4 Magazine Issue 86

Quarrying News
The sand plant has two, rubber lined cyclones fed by a single 200/150 pump. The cyclones are manufactured in such a way that the choice of three feed tubes, three vortex finders and seven apexes, give the flexibility to fine tune the end product, to the customer requirements. The overflow with minimal losses goes to the lagoon and the underflow is deposited onto the 3.7m x 1.5m dewatering screen before being fed via a polyethylene lined chute onto a 15m conveyor to stockpile.
John Collins – Technical Director at PowerX, commented, “The sand plant was designed in this way as not all feed materials and end result requirements are the same. All of our sand plants are designed to be application specific and not a standard one size fits all ethos. The extra silt requirement reduces the import of other sands, reducing the Glendinning carbon footprint. This is due to the cyclones running at a higher pressure which allows more fines recovery from the underflow. Both cyclones are linked back to the computer with pressure sensors so they can be seen in the office or control cabin.”
The Scrubbed aggregate exits the main discharge of the log washer onto a 2.4m x 1.2 dewatering screen, again the liberated fines pass through the modules and into the sump to be pumped to the sand plant for reclamation. The transfer conveyor feeds the aggregate onto the final 4.9m x 1.5m double-deck dry sizing screen. With the bottom deck split
50/50 - the first half makes a clean 4/6mm product with the second half of the bottom deck making a 6/10mm clean product. The top deck of the machine is decked out to produce a 14mm clean through the top deck, with a 20mm off the end so although a double-deck it is making four clean aggregates. The reason that this screen can do this is the plant has all the material is sized to -20mm on the Rinser.
Material is then delivered to stockpile by four 15m conveyors.
The whole plant consists of heavy-duty galvanised steel support structures, conveyors with galvanised lattice frame construction and covers and galvanised walkways throughout.
Ian Hanniford – Control Systems & Project Engineer, “We are very pleased with the new plant, the product is very good and to the required specifications. We could not fault the build and commissioning of the plant which was all completed by the PowerX engineers who were all committed to working to the very highest standards.”
www.hub-4.com May/June - Issue 86
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