Author(s):
1. Ljiljana Tankosić, Rudarski fakultet Prijedor, Republic of Srpska, Bosnia and Herzegovina
2. Pavle Tančić, Geološki zavod Srbije, Serbia
3. Svjetlana Sredić, Rudarski fakultet Prijedor, Republic of Srpska, Bosnia and Herzegovina
4. Zoran Nedić, Fakultet za fizičku hemiju, Serbia
5. Duško Torbica, Rudarski fakultet Prijedor, Republic of Srpska, Bosnia and Herzegovina

Abstract:
This paper presents the results of the study of the particle size distribution of the limonite sludge that occurs as a hydrocyclone overflow in the Omarska iron mine. The primary role of the precise characterization of grains of mineral raw material is in obtaining quantitative data on their particle size and analysis of the distribution of mineral grains by volume, which is a necessary step in controlling the processes of the iron ore beneficiation. Since the overflow of the hydrocyclone size class is -25 μm, in this paper the methods of sub-sieve analysis are used: sedimentation method-Beaker decantation, pipetting method by Andreasen-Borner and Warman cycloser. Different methods were used in order to analyze the compliance of the results, because expensive and rapid instrumental methods are often unavailable in practice. Also, the content of iron in the sludge varies, so the correlation of iron content with granulometric particle distribution was analyzed. These analyzes were carried out on two samples of sludge with different average iron content (29.43% and 41.19%). On both samples the iron content was determined per size class. The results showed a large iron content in the smallest classes (-6 microns).

Key words:
particle size distribution,limonite sludge,Beaker,Andreasen,Warman

Thematic field:
The exploitation of mineral resources and mining technological processes

Date of abstract submission:
27.06.2017.

Conference:
7th Balkan Mining Congress

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