Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Chemical treatment after start or completion of mechanical...
Patent
1988-06-22
1991-07-02
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Chemical treatment after start or completion of mechanical...
162 26, 162 28, 110190, 241 28, 241 4602, 252 62, C04B 174, D21C 104
Patent
active
050282999
ABSTRACT:
An installation and an industrial process for the production of stabilized wood particles.
The process is characterized by the succession of the following operations: mechanical reduction by a shredder, calibration, thermal treatment by passage through a rotating furnace at a decreasing temperature between 800.degree. C. and 75.degree. C., chemical treatment of impregnation/absorption/precipitation by successive action on the product while it is still hot by a soluble calcium salt and by a silicate, followed by drying and stabilization.
The installation is characterized by the fact that it is comprised of a station for primary mechanical reduction (4) of wood, which feeds a buffer silo (7) for regulation with recovery of fines, a station for thermal treatment (9) by a rotating furnace (12) followed by a station for further mechanical treatment by a crusher/fiber remover (37) and a station for chemical treatment in a double kneading atomizer (57) ending with a station for supplemental treatment relating to specific applications, and for drying, before the material is warehoused in bulk form or in bags.
This invention is of interest to the areas of construction, agriculture and horticulture, as well as various industrial and related sectors.
REFERENCES:
patent: 4528037 (1985-07-01), Guidat
de Queiroz Claudine G.
Guidat Gilbert
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