Institut za rudarstvo i metalurgiju Bor

COMMITTEE OF UNDERGROUND EXPLOITATION OF YU ISSN: 1451-0162
THE MINERAL DEPOSITS UDK: 622
UDK: 669.952:628.44(045)=20
Ljubiša Obradović * , Daniela Urošević*, Vojka Gardić*, Gavrilo Tomić **
PHYSICAL CHARACTERIZATION OF FLY ASH AND SLAG FROM
THE MEDOSEVAC DUMP
Abstract
This paper presents the results of physical characterization the excluded representative
samples of ash and slag from the dump in Medoševac, which is located within the
''Kolubara - Prerada'', located in Vreoci. The of this work is finding the best plan for
managing this type of materials. Special emphasis is given to thereduction of negative
impact of ash and slag on the environment, as well as their recycling and reuse in other
industries, as the ultimate aim of smaller amount of deposit in landfills. The physical
characterization was carried out on twelve samples and it contains: determination of
moisture content, volumetric density, specific density, pH of solid and sieve analysis of
fly ash and slag.
Key words: physical characterization, fly ash and slag, dump, environment
INTRODUCTION
Electofilter ash and slag as a secondary
material, the by-products of coal combustion
from the power plants in the DP Kolubara-
Processing, which is an integral part of
Kolubara, goes to the landfill in Medoševac,
also located within the company Kolubara.
Combustion of approximately 220 000 tons
of coal per year in heating plant, produced an
average about 28 820 tons of ash, which
required about 40 000 m 3 of accumulation
space per year. The total amount of ash and
slagis transported to landfills by the
hydraulic systems- cassettes in Medoševac.
* Mining and Metallurgy Institute Bor
** DP Kolubara-Prerada Vreoci
Given the above amount of ash and
slag that is generated annually, it is clear
that this type of waste has a significant
negative impact on the environment. According
to the classification system of waste
in the RS, ash and slag from the power
plants have already been categorized as
hazardous waste, index number from the
catalog of waste 100101/190205/190299.
Regarding to this, it is necessary to carry
out the physical-chemical characterization
of defining the possibilities for waste handling
or possible reuse.
No 1,2010. 63
MINING ENGINEERING