LPM 221: Commercial Poultry Production and Hatchery Management (1+1)

MIXER

• Two types of mixers are generally employed in mixing of ground ingredients.
  • Vertical batch mixer
  • Horizontal mixer

Vertical mixer It consists of one or more vertical screws which elevate the ingredients to the top of the mixer where they fall by gravity to the bottom, to be mixed and re-elevated. Vertical mixers are the most common type found in small feed mills. However, the vertical type is less well suited to poultry and fish feeds than the horizontal type, which are much more efficient in blending in small quantities of liquids (such as added lipids) or in mixing ingredients with different particle sizes

Horizontal mixer It consists of a series of paddles or metal ribbon blades mounted on a horizontal rotor within a semi-circular trough. The blades move the material from one end of the mixer to the other, tumbling it as it goes. These mixers usually discharge the mixed product from the bottom, using the same mixer blade action.