@inproceedings{bceeba483c0542d19dd8b71684825a98,
title = "New spiral technologies",
abstract = "Spiral concentrators are widely used for the beneficiation of fine coal in the nominally -1.0+0.15 mm size fraction and offer a number of advantages for fine coal beneficiation including low operating and capital costs, operational simplicity, excellent tolerance to variation in feed conditions, low maintenance, and high reliability. Spirals typically separate effectively at cut points between 1.70 and 1.80 specific gravity. Under more carefully controlled conditions of feed rate and percent solids, cut points around 1.60 can be achieved. The most noted limitation of current spiral models is the inability to achieve cut points below these levels to compete with other water-based technologies, such as teeter-bed separators, reflux classifiers, and water-only cyclones. Spiral manufacturers have continued to improve spiral technology to meet this challenge. Building on successful developments of a two-stage circuit in one spiral assembly, manufacturers have introduced new low specific gravity cut point spirals. Test work has been completed, and these spirals are now finding application in the coal industry.",
author = "Arnold, {Barbara J.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2019 Society for Mining, Metallurgy & Exploration All Rights Reserved.; 2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers: Challenges and Opportunities in Coal Preparation ; Conference date: 23-10-2019",
year = "2019",
language = "English (US)",
series = "Challenges and Opportunities in Coal Preparation - Proceedings from a 2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers",
publisher = "Society for Mining, Metallurgy and Exploration",
pages = "73--84",
editor = "Klima, {Mark S.} and Arnold, {Barbara J.} and Bethell, {Peter J.}",
booktitle = "Challenges and Opportunities in Coal Preparation - Proceedings from a 2019 Conference Highlighting Current Practice and Future Requirements for Coal Preparation Engineers",
address = "United States",
}