International technology group ANDRITZ has successfully started up a chemi-thermomechanical pulping system delivered to Sun Paper for its mill in the city of Beihai, Guangxi, China.

The proven ANDRITZ P-RC APMP (Pre-Conditioning Refiner Chemical Alkaline Peroxide Mechanical Pulp) line features a capacity of 600 admt/d and processes eucalyptus wood chips as raw material to produce high-quality pulp for the production of printing and writing paper. It is now the sixth
P-RC APMP line to be delivered to the Sun Paper Group by ANDRITZ.

The scope of supply comprises all key equipment for the fiberline, including the following technological highlights:
*Two-stage impregnation system with outstanding MSD Impressafiners for efficient pre-treatment and optimum chemical impregnation of wood chips prior to refining
*High-consistency (HC) refining stage with two parallel ANDRITZ S2070 single-disc refiners for superior fiber properties and highest production flexibility
*Low-consistency (LC) refining stage with ANDRITZ TwinFlo refiners to develop optimal pulp strength at lowest shive content