New waste tire recycling plant to open in Kazakhstan
The first recycling plant for old tires in Kazakhstan
was recently put into operation. Germany-based MeWa Recycling
Maschinen und Anlagenbau GmbH supplied the Central Asian
country with the entire processing line ready for operation.
Kazakhstan Rubber Recycling will in future be producing
a clean rubber granulate and an active fine powder for
use in road construction.
Long roads and great differences in temperature between
the winter and summer months pose a special challenge
for road construction in Kazakhstan. The active fine
powder produced by the new plant can in future be added
to the bitumen and thus substantially increase the quality
and lifetime of the asphalt.
The plant was inaugurated in early July in the national
capital of Astana with participation from government
representatives. The privately-owned plant will process
around 11,000 of used HGV and car tires per year using
technology from MeWa.
Tires with a diameter of up to 1.5 meters will be fed
into a MeWa UC 150 rotary shear. The machine breaks the
tires into approximately palm-sized shreds with patented
and low-wear cutting system. Throughputs of up to seven
tons per hour are possible. A granulation line from MeWa
then gradually breaks these shreds into a granular size
of around eight millimeters. After each work step, different
separation techniques then separate the textiles, stones
and steel cord that the tires contain.
Granulators that are integrated into a sophisticated
final cleaning process grind the granulate further into
grain sizes of between 0 to 4 millimeters. MeWa has optimized
this process step in the last few years and now offers
granulates in previously unmatched purities. 99.95 percent
by weight of the secondary raw material is free of steel
and textile lint at the end of the processing chain.
This granulate is used for the production of floors in
sports facilities and playgrounds, rubber mats for housing
and agriculture, and for molded part products in road
The plant will also include a special fine grinding process,
also developed by MeWa, that processes the granulate
further into the ActiMeWa. The resulting flexible fine
rubber powder can be used in road construction. It will
not only compensate for differences in temperature, but
the active powder will also considerably reduce the noise
level of the road surface and offer substantially more
grip for vehicles, even in the rain.
The first section of the plant was transported by rail
to Kazakhstan in the autumn of 2008. This was followed
by the granulate cleaning unit in the spring of 2009.
In order to be able to guarantee smooth and efficient
delivery and construction in Kazakhstan the complete
plant was built in a one of MeWa’s warehouses in Gechingen
and then disassembled and put into standard freight containers
for onward delivery. The modules could then be reassembled
on site piece by piece – similar to a construction kit.