End of Stone Age, 2016 International Mechanical Pulping (IMPC) Conference

Name “Pulp stone” has served for 150 years as a description for the central process element of GW and PGW machines. This name also describes the element very well because it is primarily made of concrete and other “stony” materials. For decades, there has been a need to bring to market a replacement for pulp stone technology as it has been a major limiting factor for GW and PGW technology development.

Long term research has been focused on the alternatives which can be described as single layer grinding surfaces (SLGS). After several years of basic research and product development, an alternative and replacement for pulp stones has now been launched. Valmet has brought new grinding technology to the market, which can be integrated with the existing PGW and GW machines. This technology is based on an all-steel construction and replaceable steel segments with only one layer of high quality industrial diamonds on top of them. These facts makes it possible to say that “Stone Age” grinding technology is finally over. This new mechanical defibration technology is named “Galileo technology”. It will be referred to as single layer grinding surface (SLGS) later in the paper. 

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.

Author: Olli Tuovinen
End of Stone Age, 2016 International Mechanical Pulping (IMP
End of Stone Age, 2016 International Mechanical Pulping Conference

New Releases


Kraft Recovery Boilers, Third Edition  

Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.



Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.



Guidelines for Safe Assessment and Operation of Yankee Dryers  

A project of the Yankee Dryer Safety & Reliability Committee.



Check our newest additions.

TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More


Available for Purchase – Conference Proceedings

TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More