4
General Description
HMDA Wet Drum Separators are designed primarily
for use in heavy media system recovery circuits
for recovery of magnetite or ferrosilicon. They are
designed to be fed a slurry or “pulp” of finely divided
particles suspended in water. Optimum pulp densities
of 5% to 25% solids by weight are most commonly
handled. Pulps with densities over and under this
range may be handled under certain circumstances.
A wet drum separator consists of a magnetic drum,
tank, support frame and drive assembled as follows:
A stationary agitation type alternating pole magnetic
element is mounted on a stationary shaft. A cylindrical
stainless steel shell encloses this assembly and is
secured to drum heads. The drum heads and shell
assembly rotate on bearings around the fixed shaft
and magnetic element. The entire drum is assembled
inside one of several specially designed tanks which
control the water level and discharge rate of the
separator. The tank, drum and drive assembly
are supported by a rugged steel frame.
CAUTION
DO NOT apply slings to the drum shell to lift
the drum separator. Lift the separator by lugs
provided or attach a sling to the frame. If the
drum is to be removed, slings should be
attached to the shaft ends with a spreader
bar, keeping the sling free of the drum shell.
DO NOT rest the drum on the shell surface.
Provide supports for the shaft ends.
DO NOT allow workmen to stand on or rest
heavy objects on the shell surface.
BEFORE OPERATING, revolve the drum
shell by hand to check for possible damage or
distortion. The drum shell must not be allowed
to rub internally or externally. Make sure
nothing has been allowed to get between
the drum shell and tank which could jam or
otherwise damage the drum.
If installed where exposed to direct sunlight,
thermal distortion of the drum occurring when
the drum is not operating, may be sufficient to
cause dragging on the magnets when the drum
is operated. To prevent this, hose down the
upper drum surface before operation, until it
reaches approximately the source temperature
as the surface not exposed to the sun.
Installation
GENERAL
Use care when lifting the separator to avoid damage
to the equipment.
FIGURE 1