. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. II N &- KN .. •;: K\ v. ,• .?i.^/.s-. ?;??. -v v^v-7 ^.-^---—^4—_. .»/ 1 Fig. 24. Action of fused sodium hydrate: After 15 minutes at 325°C.(617°F.), no evidence of any action could be noted; no action wasnoted until a temperature of 1250°C. (2282°F.) had been reached. With superheated sodium carbonate, slight action was notedafter 15 minutes at 1200°(\ (2192°F.), and considerable actionwas noted after after 15 minutes at 1250°C. (2282°F.). The lowest temperature at which the black ash could readil
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. II N &- KN .. •;: K\ v. ,• .?i.^/.s-. ?;??. -v v^v-7 ^.-^---—^4—_. .»/ 1 Fig. 24. Action of fused sodium hydrate: After 15 minutes at 325°C.(617°F.), no evidence of any action could be noted; no action wasnoted until a temperature of 1250°C. (2282°F.) had been reached. With superheated sodium carbonate, slight action was notedafter 15 minutes at 1200°(\ (2192°F.), and considerable actionwas noted after after 15 minutes at 1250°C. (2282°F.). The lowest temperature at which the black ash could readilybe reduced and fused was 900°C. (1652°). 88 MANUFACTURE OF SULPHATE PULP §6 Comparing these purely laboratory tests with practical testsmade in an American sulphate mill, the lowest temperaturementioned in the laboratory tests (900°C. = 1652°F.), the lowesttemperature at which black ash could be reduced, was foundnot to be practical in a mill; such a low temperature cannot exist,at least for any length of time. At the mill, the tests were undertaken to ascertain whether ornot a furnace would operate satisfactorily at a temperaturebetween 2000
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
