Growing pressure to curb the use of natural sand has seen an
increasing number of South African quarries turn to impact-crushing
technology to manufacture sand from rock, says IMS
Engineering’s Shannon McEwan.
IMS Engineering offers solutions to a number of challenges in sand
production through Hazemag and Magotteaux impact-crushing
technologies. IMS Engineering has supplied locally-manufactured
Hazemag impactors throughout Southern Africa for many years, under
a 45-year-old manufacturing licence agreement with Hazemag of
Germany.
Its efficiency in crushing a variety of materials including
decozenith caiman vsi crushermposed granite, dolomite, dolerite, basalt rock and quartzite
for sand production is acknowledged as unsurpassed, says
McEwan.
“In most applications, Hazemag’s AP-KV series hard-rock
horizontalshaft sand impactor (HSI) technology has the ability to
produce more pro-duct tons an hour in an open circuit than
coimpactor crusher vs vsinventional vertical-shaft impactor (VSI) units, and at a lower
operating cost per product ton. “With its high rotor speed,
the Haze- mag AP-KV is able to reduce mate- rials of less than 40
mm with a single pass (or open circuit) to sand fractions in the
order of 60% -3 mm.” IMS Engineering recently raised the bar
even higher used stone crusher for sale in ukfor these types of applications with the introduction
of Hazemag’s new-generation AP-VM technology into the local
quarrying, aggregate and readymix industries.
A redesign of the AP-KV series, the AP-VM impactor takes
opera-tional efficiencies to a new level owing to its versatility
and by further reducing operanon metallic mineral chrome crusherting costs and providing ease of
maintenance, says McEwan.
The Hazemag AP-VM horizontal- shaft impact crusher is a hard rock
combination secondary/tertiary aggre- gate impactor designed to
generate both coarse and fine cubical aggregate products simply by
varying the feed material size, rotor tip speed and impact aprogold ore separator equipment in south african
settings.
Its ability to accommodate different material feeds and to make
required products ranging from aggregate of 22 mm to sand on demand
by simply varying the opera- ting parameters, enables operators to
optimise plant production, reduce the number of crushers in use and
adapt easily to market demands.
“Typically products of 0 to 5 mm from –60-mm feed, 0 to
16 mm from –100-mm feed and 0 to 32 mm from –150-mm
feed can be produced and AP-VM impactor models are available with
capacities of 60 t/h to 140 t/h,” says McEwan.
“During sand manufacturing, run-of-quarry typically passes a
primary jaw crusher to a secondary crusher (either a hard-rock
impactor or a cone crusher) followed by tertiary and quaternary
plant. Where cone crushers are used exclusively, plants sometimes
incorporate a VSI to improve shape. In most plants an AP-VM unit
can now be used in the secondary application, providing an
excellently shaped product, followed by another AP-VM in the
tertiary stream. This effectively eliminates a crushing stage or
crushing stages. With clever plant design, the AP-VM can also be
used for both secondary and tertiary applications combined,
reducing plant even further.” Hazemag AP-VM technology
enhances the production of sand by improving the sand’s water
demand while typically producing a suitable percentage of –75