The North American industrial gases company, Air Products is currently showcasing its latest nitrogen powered mill. The PolarFit Ultra-Fine Grinding Mill is being unveiled at PTX Canada in Toronto between 21st and 23rd June.
Kimberly King, Principal Industry Engineer for North America Merchant Gases at Air Products, explained how the firm have harnessed the cooling properties of nitrogen to good effect. King commented, “Air Products’ ultra-fine-grinding mill uses the cooling power of liquid nitrogen to remove heat produced in the grinding process by controlling the temperature of the product or mill. The mill’s higher efficiency helps customers achieve a lower nitrogen-to-product ratio than can be achieved with other mills, further reducing their operating costs.”
Air Products’ new device promises to deliver a cost-effective solution to reducing the size of hard to grind materials to smaller particle sizes than can be achieved with conventional impact mills. The system generates yields of particles between 45 and 250 microns (60 and 325 mesh), and in some cases as small as 10 microns.
According to Air Products, the mill is ideal for the cryogenic size reduction of a wide range of materials, including pigments, plastics, powder coatings, thermoplastic elastomers, waxes, pharmaceuticals, nutraceuticals, spices and other foods.
King described, “The PolarFit ultra-fine-grinding mill offers advanced technology to manufacturers who now may be able to grind product to finer particle sizes, with more uniform particle distribution and higher yields in their target range, than they could before with conventional grinding systems. This can open up opportunities for new applications in a variety of markets.”