Record Display for the EPA National Library CatalogRECORD NUMBER: 4 OF 6
|Main Title||Pressurized Stone Grinding for Mechanical Pulp Production (Tampella). Compendium on Low- and Non-Waste Technology.|
|CORP Author||Economic Commission for Europe (UN), Geneva (Switzerland). Working Party on Low and Non-Waste Technology and Re-Utilization and Recycling of Wastes.;Environmental Protection Agency, Washington, DC.|
|Additional Subjects||Grinding ; Wood pulp ; Waste management ; Pressurization ; Foreign technology ; Thermomechanical pulping|
The company changed the construction of the conventional hydraulic stone grinder so that the processed wood is ground in a gas tight space under pressure. Pressurized grinding has been implemented as a batch process. The experiments were carried out with a production scale T 1512 grinder, by altering the machine to perform under pressure. As a result of the trial runs, mechanical pulp of quite a new type was obtained, the strengths of which - especially the tearing resistance - were considerably better than those of the stone-ground wood, corresponding to the strength figures of thermomechanical pulp.