会议专题

Multistage Hydrocycloning of Clayey Colemanite Tailings (Inactive Dam Wastes)

This study covers the tests to develop separation process for production of clay and colemanite rich concentrates,and aims to serve the clay and colemanite concentrates extracted from the tailing dams to the industrial applications.For this purpose,samples from the tailing dams in Kestelek Boron Plant (Turkey) with an average B2O3 content of 8%~11% were subjected to the investigations.The separation process of hydrocyclone-to make clear the way to obtain either clean clay or colemanite-was initially discussed.Therefore,following the gentle scrubbing (to keep the bimodal size distribution between clay and colemanite) of the tailings to disperse the slurry,two alternative multistage hydrocyclone processes;allowing to recycling the overflows or underflows to concentrate clay and colemanite were respectively tested.As a result of the preliminary tests,the multistage hydrocyclone separation in direction to the clean colemanite concentrates (recycling the underflows) gave the better separation efficiencies.So,all the parameters such as apex and vortex finder diameters and feeding pressures were examined with the multistage hydrocyclone process allowing the recycling the underflows.The detailed multistage hydrocyclone separation process of the tailing dam wastes yielded with colemanite concentrates (approx.12 % of the feed,w/w) with B2O3 content of 35.0 % and the clay concentrates (approx.42 % of the feed,w/w) with B2O3 content of 2.1%.Colemanite concentrates were found good enough either to re-feed in to the separation process or to keep upgrading for final product ready to use in Industry whereas the attempts on production of light bricks from clay concentrates has failed.But it is worth to point out that these clay concentrates can be used for agricultural purposes just in the form as it is.

O.K(o)kkilic F.Boylu B.Ulusahin H.Dincer

Istanbul Technical University,Faculty of Mines,Mineral Processing Engineering Department,Istanbul,Turkey

国际会议

XXIV International Mineral Processing Congress(第24届国际矿物加工大会)

北京

英文

3551-3559

2008-09-24(万方平台首次上网日期,不代表论文的发表时间)