Method And Apparatus For Pre-Treatment Of Fibre Material To Be Used In The Manufacture Of Paper, Board Or The Like

A method and apparatus for pretreating fibre material to be used in manufacturing paper or the like, for example, by precipitating mineral substances to the fibres. During precipitation, fibre material, which is advantageously pretreated in a through-flow mixer operating on the principle of an impac...

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Bibliographic Details
Main Authors SIPILA MATTI, SOLISMAA PAIVI, LAX BJORN, MAIJALA ROOPE, MAIJALA MIKKO
Format Patent
LanguageEnglish
Published 29.11.2007
Subjects
IMPREGNATING OR COATING OF PAPER
MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TRANSPORTING
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Summary:A method and apparatus for pretreating fibre material to be used in manufacturing paper or the like, for example, by precipitating mineral substances to the fibres. During precipitation, fibre material, which is advantageously pretreated in a through-flow mixer operating on the principle of an impact mill, is fed to the precipitation reactor. Gas is led to the precipitation reactor in order to generate a gas space in the reactor. The gas contains a substance, which precipitates the mineral substance such as carbon dioxide (CO2). The fibre material is fed to the gas space of the precipitation reactor as small liquid and solid substance fractions such as drops and/or particles.
Bibliography:Application Number: US20040561387