03586nas|a2200409 a 4500 20260817172532.0 020219s2000 th uu|m rtt 0| a1eng d .b11846288 AIT RSPR no.PP-00-01 Yu, Hong-yan Characterizing the fractionation capacity of laboratory pressure screens Pathum Thani, Thailand : Asian Institute of Technology, 2000 1 online resource (54 leaves) Research studies project report ; no. PP-00-01 A research study submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2000 Fiber fractionation can be used to enhance or modify pulp and paper properties. The fractionation capacity of laboratory pressure screen, and factors affecting the fractionation result was examined in this study. The fractionation capacity of pressure screens can be examined by evaluating the effects of pressure screen design and operating variables on screen performance. This study was undertaken to determine the characteristics the fractionation capacity of laboratory pressure screen of Valmet TP 031. Fiber and pulp evaluations were used for further characterize the separation efficiency or selectivity of maximum or minimum of slots width of screen basket, concentration of infeed pulp, rejection ratio and rotor speed combination. Sampling and evaluation of the following analyses were conducted on feed, accept and reject samples: stock concentration; Bauer McNett classification, freeness, length-weighted fiber length (LWL), coarseness and length distribution using a Kajaani FS 200 fiber analyzer. The separation efficiencies of fibers and fines were interesting of this investigation. Maximum of long fibers in reject stream, and fines in accept stream were studied respectively in this investigation. For all screens, the fractions differed significantly in fiber and pulp parameters; accept fractions were shorter in fiber length, less coarse and of much lower freeness than corresponding reject fractions. Inter-relationships between capacity, separation and thickening were also examined. Generally, efficient separation and, by association, high thickening, were characterized by low capacity. Pulp mills Retulainen, Elias, Chairperson Ruhanen, Mauno, Examination Committee Nazhad, Mousa M., Examination Committee Government of Finland, Scholarship Donor Asian Institute of Technology. Research studies project report ; no. PP-00-01 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B00076 .b11846288 mnait u 240329 0 020219 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120720981 CREATED : 2002-02-19 RECORD # : i12270672 LPATRON : 1015151 LCHKIN : 2018-07-07 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050120720973 CREATED : 2006-10-03 RECORD # : i12479147 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160107495 CREATED : 2016-04-20 RECORD # : i12940501 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 16450 16450 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.PP-00-01 30050120720981 2026-08-17 17:25:32 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.PP-00-01 30050120720973 2026-08-17 17:25:32 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT RSPR no.PP-00-01 30050160107495 2026-08-17 17:25:32 2026-08-17 40