First pass retention tappi

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WebMar 21, 2024 · First Pass Retention (FPR). All 10 machines noted an increase in FPR ranging from 5 to 20 % points. The magnitude of the increase depended upon the specific retention chemistries, the addition rate, and differences in process variables. The effectiveness of the retention programs was related to the following items: • Fiber selection Webfirst-pass retention evaluations.The control with no aid is an average of three tests.Figure 2shows the lab-oratory drainage rate results as per-centage improvement over no treat …

Drainage Rate - an overview ScienceDirect Topics

WebThe TAPPI T 826 Short span compressive strength test describes a procedure for determining the compressive resistance of containerboard. This method is intended for containerboard having a span-to-thickness ratio of 5 or less. This is equivalent to a grammage of between approximately 100 g/m 2 (20 lb/1000 ft 2) and 440 g/m 2 (90 … how can you read an organization\\u0027s culture

A new approach to wet-end drainage, retention, and …

Web80 July 1991 Tappi Journal II. PEI: ExamDle of newsmint mill trial data 1171 Control Trial Concentration of PEI, YO 0 0.04 Machine speed, mlmin 990 990 Output, tonsth 22.8 22.8 Consistency after press section, Ye 42.0 42.6 Steam consumption, tons/ton of paper 1.40 1.31 A 10% increase in first-pass retention was realized. 2. Web112 December 1992 Tappi Journal centrate mainly on retention control. Automatic control of retention chemi- cal feed with an on-line consistency transmitter (9, 10) has also been real- ... Consistency and first-pass retention of each furnish component Aggregation tendency of colloidal and solid particles Properties of the solution phase WebOct 15, 2024 · First pass retention is defined by 100% × (HB-WW) / HB where HB is the filterable solids content at a given time in the headbox and WW is the filterable solids in the white water or “tray water” that flows through the forming fabric (WW is sometimes a combination of tray and press section filterable solids). how can you read books on goodreads

Effects of retention and drainage aids on paper machine …

WebFirst-pass retention (FPR) values are calculated from two consistency measurements: the headbox consistency and the white water consistency where cHB and cWW are the headbox and white water consistency, respectively. ABB KPM KC9 Optical Consistency Transmitters are designed for low consistency applications. WebWithout use of the retention aid,the first-pass retention of all solids com- ponents decreased to 26%.The efflu- ent concentration of the saveall increased from 100 ppm to 300 ppm. Estimated overall retention of PCC was less than 60%.The remain- ing 40% PCC was lost in the sewage. The expected economic benefits did not result. Paper properties how can you read someone\u0027s mindWebCalculate retention of paper stock according to the TAPPI standard method.TAPPI standard method computing formula is: FPR ( % ) = ( 1 - c c 0 ) × 100 Wherein: 100ml … how many people watched the jan 6 hearings

"WebJun 15, 2005 · At a dose level of 0.5% cationic polyacrylamide, the zeta potential of the pulp was −1.3 mV, near zero, yielding maximum increase in retention and maximum improvement in drainage. At this dose level, improvement in drainage was 82% and first pass retention increased from 81.8 to 87.5%. " - First pass retention tappi

First pass retention tappi

A Novel Ultrasonic Dynamic Drainage Tester - TAPPI

WebFirst-pass retention was measured in terms of TAPPI T261 cm-10 (2010). The white ledger stock was diluted to 0.5% using tap water. Next, the C-PAMs were diluted to a … WebThe “Britt jar” achieved two important goals in retention aid evaluation. i) First, it broke ground in providing an adjustable and reproducible agitation, some- thing that might represent the net effect of unit operations in the approach flow to a paper machine.

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WebVariations due to retention efficiency can be minimized by such practices as aiming for a higher level of first-pass retention (reducing the fines content of the white water), online control of white-water solids, and online control of cationic demand. ... Hubbe, M. A., “Retention and Hydrodynamic Shear,” Tappi J. 69 (8): 116 (1986). WebFirst-pass retention (FPR) and fines retention without mat formation (Rf) were measured at room temperature using the UDDJ. To avoid mat forming, the filtrate flow-rate was …

http://www.sveacon.se/lectures/retention.pdf WebIn this paper, we present this APC scheme anddemonstrate its efficacy through results obtained from an Indonesian paper mill. The APC solution,implemented on ABB’s 800xA …

WebJan 1, 2024 · Published by TAPPI on January 1, 2010 Define the meanings of the retention terms commonly used in the papermaking process: overall, true, and first-pass retention. This document is referenced by: TAPPI T 281 - Open drum washer mat sampling technique Published by TAPPI on January 1, 2024 WebMar 1, 2007 · first-pass retention, sizing, and other produc-tion goals. (24-25) ... for the feed water of retention aids,” Proc. Tappi. Papermakers Conf., T APPI Press, Atlanta, 2, 775-784 (2002).

Web3) VBA appraises all records and publishes their approved retention periods in the appropriate RCS VB-1, PART I & PART II. 4) VBA places the Records Program Office at …

WebAlmost any retention aid is apt to improve the drainage rate as fines and fillers are removed from the white water, which decreases the solids content of the white water; … how can you reconcile a sinWebABOUT. 1st Pass Healthcare Solutions is a Texas based corporation and was founded in May 2015. Our managers and partners previously operated large and successful in … how can you recognize a ketoneWeb22 other terms for first pass - words and phrases with similar meaning. Lists. synonyms. antonyms. definitions. how can you reach amazon customer serviceWebThe first pass filler retention target was 50%. Refined eucalyptus pulp was blended with cationic starch and mixed for 2 minutes. Calcium carbonate was added and mixed for 30 seconds at a 1.0% consistency. The stock was diluted in the handsheet machine to a consistency of 0.6%. how many people watched the jan 6http://www.papergrease.com/glossary/first-pass-retention/ how can you recall a text messageWebreliably predict first-pass retention in all pulp systems. As a starch manufacturer, our company is interested in optimizing wet-end. starch retention, since this would allow papermakers to use cheaper fibers and more filler. Our research on wet-end chemistry (6) has led us to formulate a few basic rules for optimizing first-pass retention how many people watched the grammysWebThe filter was initially put in a 100 °C oven overnight to determine the total first pass retention, then in a 900 °C furnace to determine the ash content according to the TAPPI T413 om-93 (1993) standard. From the suspension composition, ash content was considered as clay content. how many people watched the jan 6th committee