Chpater 4&5 Flashcards
consists of a helicoid helix or a sectional flight mounted on a pipe or shaft that rotates in a trough.
Screw Conveyors
- is used with sticky materials
- variable pitch, tapered or ____________ conveyors provide excellent feed control of solids
- used for inclined and vertical conveying
- __________, short pitch minimizing flushing action.
- ribbon flight
- stepped flight screw
- short pitch screw
- Double flight
can transport solids for many kilometres at speeds up to 5m/s and handle up to 4500t (m/hr;narrow –flat are used for small
quantities
Belt conveyors
employ a chain supported conveying element that is transversely pulled through the solid being transported
Continuous flow conveyors
are used in the crushing of hard materials and usually are followed by other crushers for further size reduction
Jaw and gyratory crushers
best for breaking/crushing of tough
fibrous or sticky materials
Impact Crushers
commonly used for both primary and secondary crushing of friable solids
Roll Crushers
appropriate for crushing medium
–hard and soft materials and minerals
Dry pan crushers
efficiency is relatively low for size reduction of tough or resilient particle
Size reduction mills
Primary applications of vibratory mills are in fine milling of medium to hard materials, generally in dry form, producing particle
sizes of 1µm or finer
Fine grinding mills
commonly employed to cut soft and fibrous materials into smaller dimension; most economical means of cutting rods into pellets or dicing sheets into squares or cubes
Cutting-rotary cutters
___________ are used to transfer fluids from one location to another by increasing the pressure of the fluid and thereby, supplying the driving
force which is needed to flow.
PUMPS
Type of pump
____________- most widely used in chemical industries capacity
ranging from 0.5 to 2x10+4m3/h and can provide discharge head from a few meters to approximately 4.9x10=3m (equivalent to a pressure of 48MPa)
Centrifugal pumps
Positive displacement pumps achieve its maximum head by the power actually available for the driver working on the fluid ; could be either the ___________ pumps or the rotary type
reciprocating pumps
utilizes the momentum of one fluid to transport the desired attained is low and less than the head of the fluid used for pumping
Jet Pumps
is a special type utilizing steam in which the head to be pumped is discharged at the same pressure as that of the steam being used.
Steam injector
utilize the principle that a conductor in a magnetic field, carrying a current that flow at right angles to the direction of the field, has a force exerted on it
Electromagnetic pumps
