To dewater material effectively, slurry is fed onto a steep, downward inclined screen surface at the feed end of the Dewatering Screen to achieve rapid drainage. A pool of water begins to form in the valley as material builds up on the slightly upward inclined surface. Counter rotating motors create a linear motion, driving solids uphill, while liquid drains through the screen media. The uphill slope of the screen, along with a discharge weir, creates a deep bed that acts as a filter medium, allowing retention of material much finer than the screen openings.
Where cleaner materials are required, cross dams and sprays can be included to assist with the washing process, liberating fines that pass through the media
Based on the Velco Dewatering Screen design, McLanahan enhanced the original concept with a redesigned structural frame under the deck to include cross beams that make the machine easier to maintain. This design is suspended on rubber buffers rather than springs for improved wet performance. McLanahan also custom engineers screen media for heavy-duty applications.
McLanahan Dewatering Screens are designed for minimal maintenance, with no cutting or welding required. They require little operator training when installed, and produce minimal noise.
Since 1919, A.F. Gelhar Co, Inc. in Markesan, Wis., has flourished by providing silica sand to foundries throughout Wisconsin. In 2009, the company realized it was in a prime position to take advantage of the growing demand for silica sand to use in hydraulic fracturing – or fracking – and began looking for a system to help them meet the demands of the frac sand industry. READ MORE
In late 2010, Kilgore Companies, a subsidiary of Summit Materials, was formed through the merger of Harper Contracting, Altaview Concrete, Kilgore Paving, EnerCrest Products and Triple C Concrete. READ MORE
In Wisconsin, press reports have called frac sand the “new gold rush,” because of its critical importance in the process using hydraulic fracturing – or fracking – to extract oil and natural gas. The state’s abundant deposits of coarse-grained quartz sand have been mined for more than 100 years, but today, oil and gas industries prize this sand that is found in the state’s countryside. READ MORE