Production of Microfibrillated cellulose (MFC) using stirred media mills and applications in paper and board, 23TAPPICon



Microfibrillated cellulose (MFC) cab be produced by mechanical treatment of cellulose in water.  The products are produced as a low‐solids viscous suspension.  MFC can be produced from virgin chemical pulp or from recycled chemical pulp.  In some cases, minerals can be beneficially added during production.  The low production solids favour production adjacent to the point of use.  

Stirred media mills show considerable benefits compared to alternative technologies for MFC production.  They are easy to operate in a continuous production mode, with high throughputs compared to the footprint and low capital cost of the equipment; furthermore, stirred mills are reliable and have high plant availability, as they do not rely on precision‐engineered components for fibrillation which can be expensive to replace, nor do they use narrow orifices that are easy to block.  No chemical additives need to be used.  The grinding vessel comprises a chamber equipped with an impeller and partially filled with grinding media beads.  Fibrillation occurs when cellulose fibres are trapped between colliding media particles.  The high media surface area facilitates cost efficient fibrillation and the wide range of operating variables and conditions allows tunable production. 

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Author: David Skuse; Lewis Taylor; and Tom Larson
Production of Microfibrillated cellulose (MFC) using stirred
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