Mill; Impact/Cutting, A11, IKA, 120 V

Available Accessories for  A 11 basic Analytical Mill

Grinding Procedures of A 11 basic Analytical mill

Impact Milling

• Grinds materials with hardness greater than 4 Mohs when used with A 11.3 beater
• Beating rotor reduces grinding material (must be reduced to 1 cm (feed granularity 10 mm—size of grain of corn ideal)
• Breaks up hard, brittle grinding material, dried material or material brittle from cold
• Granularity of final product determined by duration of grinding, amount of product and physical properties of material
• Types of materials processed: Grain, barley, corn, malt, pectin, roasted coffee, bark, roots, nutshells, bones, ergot, compressed materials, peat, cellulose, pharmaceutical, artificial, fertilizers, feed materials, spices, resin, potash, seeds, salts, slag
• Tough grinding material must be cooled with dry ice adding to grinding container

Cutting Milling

• Reduces bulk, elastic fibrous and soft materials with high cellulose content when used with A 11.2 cutting blade
• Rotating blade cuts grinding material
• Introduces less heat into grinding material
• Granularity of final product determined by duration of grinding, amount of product and physical properties of material
• Types of materials processed: Leaves, fibers, spices, grain, hops, cardboard, paper, hay, plastics, tobacco, peat, feed goods, dough and roots (feed granularity should be no greater than 10 mm)
• Added water should not be filled to more than 50% capacity

Cooling Processes for A 11 basic Analytical Mill

Dry ice cooling (CO2): approx. –78 °C

• Do not use A 11.4 grinding beaker (250 ml made of polycarbonate); beaker will break during cooling process
• Add dry ice after putting feed product into grinding beaker
• Prevent high pressure from building up in grinding chamber by waiting until dry ice is completely vaporized before attaching the drive

Liquid nitrogen cooling (N2): approx. –196 °C

• Use beater (A 11.1 or A 11.3)
• Do not use A 11.2 (blade becomes blunt quickly)
• Pour feed product into grinding beaker then pour liquid nitrogen with use of suitable Dewar vessel to ensure sample is completely submerged or covered
• Prevent high pressure from building up in grinding chamber by waiting until liquid nitrogen is completely vaporized before attaching the drive
• Use filling funnel A 11.7 to pour in liquid nitrogen