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Coal preparation and coal cleaning in the dry process; Kanshiki sentaku to coal cleaning

Abstract

Because the wet process has a problem such as waste water treatment, coal cleaning in the dry process was discussed. When a fluidized bed (using glass beads and calcium carbonate) is utilized instead of the heavy liquid, the fluidized bed will have apparent density as the liquid does, whereas the relative relationship therewith determines whether a substance having been put into the fluidized bed will float or sink. This is utilized for coals. In addition, two powder constituents of A and B may be wanted to be separated using the fluidized extraction process (similar to the liquid-liquid extraction process). In such a case, a fluidized bed in which both constituents are mixed is added with a third constituent C (which will not mix with A, but mix well with B), where the constituents are separated into A and (B + C), and the (B + C) constituent is separated further by using a sieve. If coal has the coal content mixed with ash content and pulverized, it turns into particle groups which have distributions in grain size and density. Groups having higher density may contain more ash, and those having lower density less ash. In addition, the ash content depends  More>>
Authors:
Tanaka, Z; Morikawa, M; Fujii, Y [1] 
  1. Okayama University, Okayama (Japan). Faculty of Engineering
Publication Date:
Sep 01, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-98750585
Reference Number:
SCA: 010300; 010900; 015000; PA: JP-97:0K0400; EDB-98:070978; SN: 98001942566
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; COAL; COMMERCIALIZATION; COAL PREPARATION; PROCEEDINGS; CLEANING; FLUIDIZED BEDS; DENSITY; EXTRACTION; ELUTRIATION; WATER; PROCESSING; WASTE PROCESSING; WASTE WATER; HEAVY MEDIA SEPARATION; PARTICLE SIZE CLASSIFIERS; ASH CONTENT; DISTILLATION
OSTI ID:
623059
Research Organizations:
Center for Coal Utilization, Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98750585; TRN: JN97K0400
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. 46-57
Announcement Date:

Citation Formats

Tanaka, Z, Morikawa, M, and Fujii, Y. Coal preparation and coal cleaning in the dry process; Kanshiki sentaku to coal cleaning. Japan: N. p., 1996. Web.
Tanaka, Z, Morikawa, M, & Fujii, Y. Coal preparation and coal cleaning in the dry process; Kanshiki sentaku to coal cleaning. Japan.
Tanaka, Z, Morikawa, M, and Fujii, Y. 1996. "Coal preparation and coal cleaning in the dry process; Kanshiki sentaku to coal cleaning." Japan.
@misc{etde_623059,
title = {Coal preparation and coal cleaning in the dry process; Kanshiki sentaku to coal cleaning}
author = {Tanaka, Z, Morikawa, M, and Fujii, Y}
abstractNote = {Because the wet process has a problem such as waste water treatment, coal cleaning in the dry process was discussed. When a fluidized bed (using glass beads and calcium carbonate) is utilized instead of the heavy liquid, the fluidized bed will have apparent density as the liquid does, whereas the relative relationship therewith determines whether a substance having been put into the fluidized bed will float or sink. This is utilized for coals. In addition, two powder constituents of A and B may be wanted to be separated using the fluidized extraction process (similar to the liquid-liquid extraction process). In such a case, a fluidized bed in which both constituents are mixed is added with a third constituent C (which will not mix with A, but mix well with B), where the constituents are separated into A and (B + C), and the (B + C) constituent is separated further by using a sieve. If coal has the coal content mixed with ash content and pulverized, it turns into particle groups which have distributions in grain size and density. Groups having higher density may contain more ash, and those having lower density less ash. In addition, the ash content depends also on the grain size. The ash content may be classified by using simultaneously wind classification (for density and grain size) and a sieve (for grain size). This inference may be expanded to consideration of constructing a multi-stage fluidized bed classification tower. 12 figs., 5 tabs.}
place = {Japan}
year = {1996}
month = {Sep}
}