Terminologia Para El Uso De Mezcladores Y Dispersadores

AGGLOMERATION: The recombining of finely dispersed particles into larger particles, usually caused by a rearrangement of surface forces resulting from a change of environment. (Opposite of Dispersion.)

AGITATOR: A device consisting of at least a power package, a shaft and an impeller to provide agitation of the contents of a vessel.

ANCHOR IMPELLER: An impeller whose contour closely conforms to the vessel bottom and walls.

APPARENT VISCOSITY: The flow resistance of a Non-Newtonian Fluid at some arbitrary point on its stress-flow curve. Also the consistency of a material at some particular velocity.

AUGER BLADE: Helps turn batch over or promote top to bottom mixing.

AUGER FLOW: The movement of a fluid generally from the top to the bottom of the tank.

AXIAL TURBINE: A Turbine with pitched blades (usually 450) whose discharge is a mixture of Axial and Radial Flows.

BAFFLE: A stationary device usually installed at or near tank walls to prevent liquid swirl and promote vertical flow in the vessel.

BLADE: Another term for Impeller.

BLENDING: Mixing two or more miscible liquid components into a more uniform mass.

BOXED ANGLE BLADE CONSTRUCTION: This blade uses “angle-iron” as a base construction. The angle iron is “closed” by welding a plate over it forming a hollow tube inside completing the triangular shaped blade.

BRIDGE: The fabricated portion that houses the machine drive system and supports the disperser shaft and motor. Also known as the Header.

BULK DENSITY: The Density of a granular or powdered solid material including the voids between the particles. It is always less than the true Density.

CENTIPOISE: A measurement of Viscosity.

COMPOUND DRIVE: Technical term for a machine with a variable speed pulley system and classic V-belt drive system. Also known as a Jackshaft drive.

CONSISTENCY: The resistance of a fluid to deformation when subjected to shear stress, usually synonymous with Viscosity.

CRITICAL SPEED: The rotational speed of a shaft equal to the frequency of the natural harmonic vibration of the shaft. In ball milling this refers to the rotation of the mill being in excess speed therefore centrifuging the media and loosing milling capability.

CRYSTALLIZATION: Formation of a solid liquid. (Opposite of Dissolving.)

DENSITY: The mass per unit volume of a substance. See Bulk Density & Specific Gravity.

DILATANT FLUID: A material in which the Viscosity increases with increasing shear rate. (Opposite of Pseudoplastic.)

DIRECT DRIVE: Close coupled motor to disperser bearing housing.

DISPERSION: A two-phase in which one phase is broken into discrete particles which are completely surrounded by the second phase. Particles may be solid, liquid or gas. For mixing purposes, the second phase is generally a liquid. Not to be confused with Solids Wetting.

DISSOLVING: A change of phase from solid to liquid by combining with a liquid solvent. (Opposite of Crystallization.)

EMULSION: A colloidal dispersion of two or more liquids

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