Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MECHANISMS OF PULP LOSS IN FLOTATION DEINKING
Autore:
AJERSCH M; PELTON R;
Indirizzi:
MCMASTER UNIV,MCMASTER CTR PULP PAPER RES,DEPT CHEM ENGN,1280 MAIN STW HAMILTON ON L8L 4L7 CANADA
Titolo Testata:
Journal of pulp and paper science
fascicolo: 9, volume: 22, anno: 1996,
pagine: 338 - 345
SICI:
0826-6220(1996)22:9<338:MOPLIF>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENTRAINMENT; FIBERS; WETTABILITY; COLUMNS;
Keywords:
DEINKING; FLOTATION; PULPS; FIBERS; FINES; BUBBLES; DIMENSIONS; CONSISTENCY; LOSSES; KRAFT PULPS; BLEACHED PULPS; MECHANICAL PULPS; SODIUM COMPOUNDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
M. Ajersch e R. Pelton, "MECHANISMS OF PULP LOSS IN FLOTATION DEINKING", Journal of pulp and paper science, 22(9), 1996, pp. 338-345

Abstract

The objective of this study was to investigate the effects of pulp type, consistency and bubble size on the flotation of pulp fibres and fines. Laboratory-scale batch flotation experiments were conducted usingbleached kraft and mechanical pulp in the presence of sodium dodecyl sulphate. Pulp losses were linearly dependent on the recovery of waterin the foam. These pulp losses were generally greater with small bubbles (similar to 100-400 mu m) and with the mechanical pulp. With dilute pulp suspensions, the consistencies of the foam and the feed were similar. For more concentrated pulp suspensions, the consistencies of the foams were less than those of the feed, and pulp fines tended to be concentrated in the foam. The primary pulp loss mechanism was entrainment, in which pulp fibres and fines were transported hydraulically into the foam with the water. Two regimes of entrainment are possible, depending on the extent of flocculation. In the absence of flocculation,the individual loose fibres and fines from the bulk pulp suspension are carried into the foam. When the pulp is flocculated, the bubbles are diverted around the flocs, and entrain the smaller fibres and fines from the more dilute, inter-floc regions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 14:29:40