Use of impact crushing for the enrichment of low-grade colemanite concentrates

A. Sirkeci*, A. Gül, G. Bulut, M. Savas, F. Burat

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents the results of an investigation into the enrichment of -25+3 mm low grade colemanite concentrates exploiting differential breakage properties of various minerals associated within the ore sample. Boric acid production process requires concentrates containing at least 42 per cent B2O3, hence concentrates below this grade either stock piled or further treated to increase B2O3 content. The low grade concentrate is obtained as a by-product of Emet Colemanite Concentrator and the B2O3 content may vary around 37 - 38 per cent. The sample used in the experimental studies assays 37.52 per cent B2O3. In the experimental procedures the sample was crushed using a laboratory size horizontal shaft impact crusher and the products were classifi ed into different size fractions by screening so that any improvement by size could be observed. In the tests the effects of parameters such as the revolution speed of the crusher and heat treatment was checked. Test results prove that boron contents show a tendency to increase as the particle size decreases. As a result of the experimental studies a colemanite concentrate assaying 42.13 per cent B2O3 is produced with 76.55 per cent recovery. Arsenic content is seen to change inversely proportional with the B2O3 content of the concentrate such that it drops from 1016 ppm from the as received sample to 676 ppm in the concentrate.

Original languageEnglish
Title of host publicationXXV International Mineral Processing Congress 2010, IMPC 2010
Pages1243-1248
Number of pages6
Publication statusPublished - 2010
Event25th International Mineral Processing Congress 2010, IMPC 2010 - Brisbane, QLD, Australia
Duration: 6 Sept 201010 Sept 2010

Publication series

NameXXV International Mineral Processing Congress 2010, IMPC 2010
Volume2

Conference

Conference25th International Mineral Processing Congress 2010, IMPC 2010
Country/TerritoryAustralia
CityBrisbane, QLD
Period6/09/1010/09/10

Keywords

  • B2O3
  • Colemanite concentrate
  • Impact crusing

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