Quarry Southern Africa January 2017 | Page 36

Liebherr presents new RIV 2.5D ring-pan mixer
US-based Superior Industries has launched a new attrition mill in its line of washing and classifying machinery . The 37kW machine provides an efficient solution for sand applications including disintegration of conglomerates , material separation , and surface cleaning and polishing . Coated with long lasting urethane , the mill ’ s tank and impellers are built to endure tough sand cleaning applications . Round tubs eliminate swirling and corner material collection , while a large , watertight sealed door makes for convenient maintenance . The attrition mill has a 137cm outside diameter and height of 183cm , and was designed to handle 75 – 120 tonnes per hour .
SANY launched its SY750H heavy-duty excavator and three C10-series rock drilling rotary drilling rigs at bauma China 2016 . The 76.2-tonne SY750H is designed for heavy load operation at mines and , according to Sany , offers a significantly higher bucket digging force ( 67 %) and arm digging force ( 129 %) than standard excavators . The excavator is highly customisable : its 4.2m ³ bucket is replaceable ; the hammer , scarifier and hydraulic breaker are optional ; and the excavator arm can be removed and replaced by either a twosection arm or a standard arm . Sany claims the excavator can simultaneously increase operating efficiency and reduce fuel consumption , both by up to 10 %. The C10 rotary drilling rigs have Isuzu engines , six-gear control , tailormade chassis , fifth generation rotary drive , and a new main winch design , making them suitable for rock drilling and foundation work in various geological conditions .
Liebherr
The new generation Liebherr RIV 2.5D ring-pan mixer offers adjustable speeds for the main gear and agitator tools , enabling efficient mixing of high-quality concrete formulas .

Liebherr presents new RIV 2.5D ring-pan mixer

Bauma China 2016 saw Liebherr present its RIV 2.5D ringpan mixer — a new ring-pan mixer for the concrete and prefabricated parts industry .
The new system features a ring-trough system with a specially formed ring canal that guarantees rapid homogenisation by forcing the complete mix to flow to the mixing paddles or tools , with high agitator speeds preventing lump formation .
Two agitator tools are fixed to the main agitator at different distances , guaranteeing quick and optimal mixing in all areas . Two high-performance electric motors mean that the speed of the double-agitator system can be adjusted independently from the main gear , allowing tool speeds to be optimally adjusted depending on the progress of the mixing process .
A frequency converter enables the adjustment of rotational speeds to a given mix design during mixing . Different rotational speeds for wet and dry mixing can be selected during the filling process , as well as during discharge .
The wide-open trough allows optimal material feed and free access to the mixing tools , as well as quick and thorough cleaning . The cover is free from overhead attachments , making it possible to open the mixer by between 30 % and 60 %, depending on the application . The gear and drive motors are arranged below the mixer , leaving sufficient room up top for material feed and dedusting components .
34 _ QUARRY SA | JANUARY 2017