You need JavaScript to view this

Separation of unburned carbon from coal fly ash through froth flotation; Sekitanbai no shisshiki datsutanso gijutsu kaihatsu shiken

Abstract

Coal ash tends to become containing more unburned carbon and porous substances depending on conditions of combustion, whose adverse effects to products due to water adsorbability, absorbability and color tones create obstacles in its utilization. Therefore, research and development works have been progressed on wet type carbon removing technology which is characterized in that coal is pulverized to preferable degrees and subjected to flotation. This paper reports the results obtained during fiscal 1995. The results may be summarized as follows: as a result of the comparison test on a column flotation machine and an FW type flotation machine of machine stirring type, the former machine showed better flotation efficiency; several methods were investigated on crushing as a treatment prior to flotation, whereas a mixer with greater circumferential speed and a homo mixer showed the highest efficiency; strength of the impact to the flotation efficiency was found to decrease in the order of pulp concentration > pretreatment time > collector addition ratio; and as a result of the evaluation on refined ash as a cement admixture and carbons as fuel, possibilities were found in them for practical application. 16 figs., 2 tabs.
Authors:
Miwa, T; [1]  Murakami, T [2] 
  1. Center for Coal Utilization, Japan, Tokyo (Japan)
  2. The Coal Mining Research Center, Japan, Tokyo (Japan)
Publication Date:
Sep 01, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-98750585
Reference Number:
SCA: 010400; 010500; 010600; 010800; PA: JP-97:0K0412; EDB-98:070991; SN: 98001942578
Resource Relation:
Other Information: PBD: Sep 1996; Related Information: Is Part Of 6th Conference on Coal Utilization Technology; PB: 305 p.; Dai 6 kai sekitan riyo gijutsu kaigi koenshu
Subject:
01 COAL, LIGNITE, AND PEAT; FLY ASH; COAL; DECARBONIZATION; AQUEOUS SOLUTIONS; PYROLYTIC CARBON; COMBUSTION KINETICS; POROUS MATERIALS; ADSORPTION; HYGROSCOPICITY; COLOR; FLOTATION; STIRRING; CRUSHING; ANGULAR VELOCITY; MIXERS; ADDITIVES
OSTI ID:
623071
Research Organizations:
Center for Coal Utilization, Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98750585; TRN: JN97K0412
Availability:
Available from Center for Coal Utilization, Japan, 3-4, Okubo 2-chome, Shinjuku-ku, Tokyo, (Japan); OSTI as DE98750585
Submitting Site:
NEDO
Size:
pp. 192-203
Announcement Date:

Citation Formats

Miwa, T, and Murakami, T. Separation of unburned carbon from coal fly ash through froth flotation; Sekitanbai no shisshiki datsutanso gijutsu kaihatsu shiken. Japan: N. p., 1996. Web.
Miwa, T, & Murakami, T. Separation of unburned carbon from coal fly ash through froth flotation; Sekitanbai no shisshiki datsutanso gijutsu kaihatsu shiken. Japan.
Miwa, T, and Murakami, T. 1996. "Separation of unburned carbon from coal fly ash through froth flotation; Sekitanbai no shisshiki datsutanso gijutsu kaihatsu shiken." Japan.
@misc{etde_623071,
title = {Separation of unburned carbon from coal fly ash through froth flotation; Sekitanbai no shisshiki datsutanso gijutsu kaihatsu shiken}
author = {Miwa, T, and Murakami, T}
abstractNote = {Coal ash tends to become containing more unburned carbon and porous substances depending on conditions of combustion, whose adverse effects to products due to water adsorbability, absorbability and color tones create obstacles in its utilization. Therefore, research and development works have been progressed on wet type carbon removing technology which is characterized in that coal is pulverized to preferable degrees and subjected to flotation. This paper reports the results obtained during fiscal 1995. The results may be summarized as follows: as a result of the comparison test on a column flotation machine and an FW type flotation machine of machine stirring type, the former machine showed better flotation efficiency; several methods were investigated on crushing as a treatment prior to flotation, whereas a mixer with greater circumferential speed and a homo mixer showed the highest efficiency; strength of the impact to the flotation efficiency was found to decrease in the order of pulp concentration > pretreatment time > collector addition ratio; and as a result of the evaluation on refined ash as a cement admixture and carbons as fuel, possibilities were found in them for practical application. 16 figs., 2 tabs.}
place = {Japan}
year = {1996}
month = {Sep}
}