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POSSIBILITIES FOR ECONOMIC VALORIZATION OF SMALL COAL DEPOSITS IN THE REPUBLIC OF MACEDONIA

P. Lazarov, T. Serafimovski, G. Tasev

First published: 2005DOI pendingView metrics

Abstract

In this study, diagnostic leaching and ultrafine grinding as pretreatment step ahead of two-stage cyanidation of KaletaЕџ ore were studied to shed light on the refractory characteristics of ore. The overall gold extraction of 93\% was achieved in two-stage cyanidation of ultrafinely ground ore suggesting the presence of readily recoverable gold (74\%) and slowly reacting gold (19\%) in the ore. Diagnostic leaching approach provided information into the cause of the refractoriness of the ore. The findings of diagnostic leaching tests suggested that the refractoriness could be due to the dissemination and encapsulation of the very fine gold particles largely within the carbonates, oxides and sulfides and, to a small extent, within silicates present in the ore matrix .

Publication details

Title
POSSIBILITIES FOR ECONOMIC VALORIZATION OF SMALL COAL DEPOSITS IN THE REPUBLIC OF MACEDONIA
Authors
P. Lazarov, T. Serafimovski, G. Tasev
Proceedings
5th International Scientific Conference - SGEM2005
Publisher
SGEM Scientific GeoConference
Year
2005
Pages
169-176
ISSN
1314-2704
ISBN
954-918181-2
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
References9

  1. IEA-International Energy Agency (1989): Energy and the environment: Policy Overview.

  2. Lazarov, P. and Serafimovski, T., (1997): Ore deposits and occurrences of energy raw materials in the Republic of Macedonia. Special edition RGF Stip, No 6,

  3. pgs. (extended summary in English).

  4. Lazarov, P., (2003): Istra`uvawe na mineralni surovini. Rudarsko-geolo{ki fakultet, [tip.

  5. Lazarov, P., (2004): Ocenka na rentabilitetot za ekploa tacija na malite le`i{ta za jaglen vo Republika Makedonija. Nau~noistra`uva~ki proekt. Skopje. str. 123. Reserves x 106 Annual capacity Deposit Coa l (t) Overb ur. Coal (t) Overbur (m3) Exploit. period (years) Expr (ha) Coal price EUR/t Deposit value (x10 6EUR) Popovjani 9.0 38.5 4.3 5000000 2200000 18 400 10.0 36.0 StarRud.- Oslomej

  6. 6 3.85 2.4 250000 960000 6 9.5 8.0 10.5 Oslomej

  7. 6 6.0 3.75 250000 940000 6 8.7 8.0 10.5 Lavci 17 68.0 4.0 500000 2000000 34 28 12.0 34.0 Katlanovo 13 60.0 4.6 500000 2300000 26 120 11.7 29.9 Zvegor- Stamer

  8. 1 28.0 4.6 200000 900000 28 96 12.0 14.0 S.Istevnik Pancarevo

  9. 7 38.5 5.0 250000 1250000 30 108 12.0 15.5

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