Record Display for the EPA National Library Catalog
RECORD NUMBER: 4 OF 6Main Title | Pressurized Stone Grinding for Mechanical Pulp Production (Tampella). Compendium on Low- and Non-Waste Technology. | |||||||||||
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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. | |||||||||||
Publisher | 1995 | |||||||||||
Year Published | 1995 | |||||||||||
Stock Number | PB95-233755 | |||||||||||
Additional Subjects | Grinding ; Wood pulp ; Waste management ; Pressurization ; Foreign technology ; Thermomechanical pulping | |||||||||||
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Collation | 20p | |||||||||||
Abstract | 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. |