The Papermakers' Pocket book / [by] James Beveridge ; Specially Compiled for Paper Mill Operatives, Engineers, Chemists, And Office Officials
The book The Papermakers' Pocket book / [by] James Beveridge ; Specially Compiled for Paper Mill Operatives, Engineers, Chemists, And Office Officials was written by author Beveridge, James, Paper Maker Here you can read free online of The Papermakers' Pocket book / [by] James Beveridge ; Specially Compiled for Paper Mill Operatives, Engineers, Chemists, And Office Officials book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Papermakers' Pocket book / [by] James Beveridge ; Specially Compiled for Paper Mill Operatives, Engineers, Chemists, And Office Officials a good or bad book?
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thick. The pulp digester in this particular case held 8^ cubic metres of chopped and cleaned wood. The volume of caustic soda lye per charge = 6,000 litres ( = 1,320-7 gallons), and contained 75 kilos, of soda (Na. 2 O) per cubic metre of wood. The pulp boilers were heated by direct steam to 125 lbs. pressure above atmosphere (353 c Fah.). The length of time this pressure was maintained varied with the size (or age) of the pulp wood, thus : — 35 cm. dia. and above, the pressure is maintained fo...r 2 hours. 35 — 25 cm. „ „ „ „ 1| „ 25 — 15 „ ,, .. „ „ 1 hour Each charge of the digester yields 1,240 kilos. = to 24-35 cwts. of air-dry unbleached pulp = 145-9 kilos, per cubic metre of pulp wood. From the above figures the following are deduced : — 60° o caustic soda required per ton of air-dry pulp = 14*75 cwts. Air-dry pulp per charge ... ... ... = 24*35 ,, S9 0) X J. '— o V 3*3: — ^" ^v ; "a3 -F — - •— i. o ^3^ _ ^ — . °5&£ / u- CO CO C5 i-H X ■* Si 00 i- CO X O i-H ■*o H g ^ O O O^OJ o-; Ol 01 I~ CXXX-*h®£NX®M ' o ~£~ £ 3 5 » » l- c: ; r.
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