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Title: Spiral concentrators recover fine coal

Abstract

Compound spirals offer better performance in a more efficient configuration. Prep plant operators in the US are increasingly opting to use spiral concentrators. They are easy to install, operate and maintain but their downfall is low capacity. The article describes spirals available from PrepTech/Multotec, Krebs Engineers and Roche MT. It reports on research on spiral concentrator technology. 1 ref., 4 figs.

Authors:
Publication Date:
OSTI Identifier:
20712233
Resource Type:
Journal Article
Resource Relation:
Journal Name: Coal Age; Journal Volume: 110; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL PREPARATION; COAL FINES; MATERIALS RECOVERY; SPIRAL CONFIGURATION; DESIGN; SEPARATION EQUIPMENT; CONCENTRATORS; USA; CAPACITY

Citation Formats

Fiscor, S. Spiral concentrators recover fine coal. United States: N. p., 2005. Web.
Fiscor, S. Spiral concentrators recover fine coal. United States.
Fiscor, S. Thu . "Spiral concentrators recover fine coal". United States. doi:.
@article{osti_20712233,
title = {Spiral concentrators recover fine coal},
author = {Fiscor, S.},
abstractNote = {Compound spirals offer better performance in a more efficient configuration. Prep plant operators in the US are increasingly opting to use spiral concentrators. They are easy to install, operate and maintain but their downfall is low capacity. The article describes spirals available from PrepTech/Multotec, Krebs Engineers and Roche MT. It reports on research on spiral concentrator technology. 1 ref., 4 figs.},
doi = {},
journal = {Coal Age},
number = 12,
volume = 110,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}
  • The historical development of Reichert spirals is briefly reviewed prior to describing models developed specifically for the treatment of coal fines. Results obtained from laboratory tests and field trials of pre-production prototypes are presented. Comparisons are provided both between different tests and between test results and the ideal performance defined by washability data using a graphical technique. Production model spiral test data and partition curve for a variety of types of feed are presented. Possible application areas are discussed, including tailings scavenging, flotation substitution and fine coal dump retreatment. 9 references.
  • The spiral arms of the Galaxy are not just a phenomenon of the galactic plane. Because of the inaccuracy of current distance determinations of spiral tracers, any fine structure of the spiral arms has to be investigated by an analysis of the positions on the celestial sphere. Such fine structure perpendicular to the galactic plane is revealed by wide-angle photographs and photoelectric surface photometry of the Southern Milky Way in the ultraviolet. (WDM)
  • We have constructed an x-ray monochromator based on a log spiral of revolution covered with highly oriented pyrolytic graphite. Such a monochromator is used for obtaining x-ray absorption edge fine structure by the fluorescence method, and is particularly useful for measuring the fine structure of dilute element A in a concentrated matrix of element B, where B is to the left of A in the Periodic Table. Using the log spiral monochromator, we measure good Cr x-ray fine structure in an alloy of 1% Cr in a V matrix, whereas the corresponding spectrum is severely distorted by the V backgroundmore » if nonmonochromatized fluorescence is used. We also obtain excellent rejection of Mn fluorescence relative to Cr fluorescence in a Cr{sub 80}Mn{sub 20} alloy, and can tune the monochromator such that the entire Mn step height is significantly smaller than the Cr x-ray absorption edge fine structure oscillations for this system. (c) 2000 American Institute of Physics.« less
  • The article briefly discusses spiral and cone concentrators.