Process for producing and flash drying high yield mechanical cellulose pulp with steam and condensate recycle

摘要: A process is provided for inexpensively producing high yield mechanical cellulose pulp having good paper properties, which comprises preheating particulate lignocellulosic material; defibrating the preheated material under a superatmospheric steam pressure within range from about 2 to 4.5 bar above atmospheric in disc refiner conditions such that generated during defibration; continuing defibration until obtained freeness 300 700 ml CSF; flash drying defibrated while maintaining said drying; withdrawing and passing it indirect heat exchange with utilized drying, so as utilize at least 30% of content thereof; then removing baling flash-dried pulp. Water vapor produced dryer condensed recycled refiner.