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Sieves & Screens

material is retained by the screen and moves along the chamber to the far end, where it is recovered through a second discharge spout. In the case of bran, fine waste material is ejected through the screen, while the bran is retained and collected from the second outlet. All the waste is bagged and used for feeding pigs. The company found the centrifugal sifter through an Internet search and bought it after seeing a demonstration at Kason’s facility in Stoke-on-Trent. The screener achieves a very good separation, with no wasted product, and the quality of the flour is excellent, says Caroline Jones, Ben’s daughter, whose principal responsibilities are baking and running the company tearoom for visitors (her mother handles the accounts and her brother farms the land).

“The machine is very easy to operate and there is no problem with screen clogging,” she says. “We occasionally dust it down, but basically it cleans itself Walk Mill serves two markets. The 25 kg sacks are shipped to upscale restaurants and hotels that make their own bread. For the retail market, flour is delivered in 1.5 kg bags that are filled by hand from the larger sacks.

more of it, and wheat flour for one day,” says Jones. In the case of the finer, white flour the product passes through the screen for bagging, as explained above. Coarser, waste

In addition to white and wholemeal flour, Walk Mill sells two other types of flour: malted flour, which is white flour plus malt flakes and malt extract, and self-raising flour (white flour plus baking powder) for making cakes. Malted flour is packaged for both wholesale and retail sale and self-raising flour is sold only retail. Visitors who come to see the mill can entertain themselves by looking through a sealed glass window to watch the stones steadily grind away. After that they can enjoy fresh bread, cakes and scones in the company teashop.

For more information contact Kason Corporation Europe on tel: 01782 597 540 or visit:

Ultrasonic sieving technology

The integration of Ultrasonic technology into Farleygreene’s sieving units has been beneficial in so much that it eliminates mesh deblinding and blocking, and accelerates throughputs by a massive 400%.

The patented next generation version goes above and beyond the abilities of predecessor by applying a continuously varying wave, known as frequency variation, to the mesh screen. This solves common problems that the ‘single wave’ resonance frequency systems of the past suffered from; including heating and ‘hot spots’ that ran the risk of causing premature mesh failure, as well as the individual tuning of each screen in order to work correctly. The new Sonotech system, however, finds its own frequency and uniformly washes over the entire screen in a smooth and consistent wave pattern; thus reducing the need for wasteful re-meshing. The converter probe is conveniently situated outside the internal sieving area, to escape material caking as well as making the mesh frame much easier to clean and just a single control box can now run three screens, representing a huge cost saving from other systems on the market, which require the inconvenience of devoting a generator for deblinding each mesh.

Farleygreene can fit the Sonotech to all machines from the Sievmaster range of screening equipment, as well as a simple retro fit onto other manufacturer’s existing ultrasonic mesh

42 Solids & Bulk Handling • May 2012

frames. Test units are readily available for demonstration at our facility, or on site trials can also be arranged. For more information contact Farleygreene on tel: 01252 322 233 or visit:

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