Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Kraft Pulp, Linerboard and Fluting Medium
Kraft ("strong") paper comes from wood chips cooked under pressure at 170–176 °C in white liquor, a solution of sodium hydroxide and sodium sulfide that dissolves the lignin. About half the wood comes out as brown pulp. Softwood pulp makes linerboard and brown kraft paper; hardwood pulp makes the fluting medium. A paper machine forms, presses, dries and reels it.
The picture: our diagram of chips, digester and paper machine.
Hejuru
Factory process
Amabwiriza
1
1
Chip the logs
Chip the logs
Cut the softwood and the hardwood logs to length and chip each separately.
Ibikoresho by'iyi ntambwe:
Ibiti byoroshye1 igice
Ibiti bikomeye (mwaloni, mapulo, bicheri)1 igiceIbikoresho bikenewe:
Umusumeno ufite moteri (uw'urwego rw'umwuga w'amashyamba)
Imashini ica ibiti uduce2
2
Make the white liquor
Make the white liquor
Dissolve sodium sulfide into the sodium hydroxide solution: this is the white liquor.
Ibikoresho by'iyi ntambwe:
Hidorogiside ya sodiyumu, umuti wa 10 %20 litiro
Sulifide ya sodiyumu1 kgIbikoresho bikenewe:
Uturindantoki Turwanya Ibinyabutabire
Amadarubindi Yifunze yo Kwirinda3
3
Cook
Cook
Cook each batch of chips in white liquor in the closed digester at 170–176 °C until the lignin has dissolved and the chips fall apart.
Ibikoresho bikenewe:
Inkono itekesha ifu y'impapuroUturindantoki Turwanya IbinyabutabireAmadarubindi Yifunze yo Kwirinda4
4
Wash the brown stock
Wash the brown stock
Drain off the black liquor and wash the brown pulp with water.
Ibikoresho by'iyi ntambwe:
Amazi100 litiroIbikoresho bikenewe:
Uturindantoki Turwanya Ibinyabutabire5
5
Form, press, dry, reel
Form, press, dry, reel
Dilute the pulp and run it on the paper machine: drain it on the wire, press it between rolls, dry it round the steam cylinders and wind it on reels. Softwood pulp gives linerboard and brown kraft paper; hardwood pulp gives fluting medium.
Ibikoresho bikenewe:
Imashini ikora impapuro6
6
Pulp yield
Pulp yield
Gupakira ikaye ya Jupyter…
Ibikoresho
5- 1 igiceUmwanya
- Umwanya
- Umwanya
- Umwanya
- 100 litiroUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
Iki gishushanyo gikora
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Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
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