We present preliminary results obtained using a time domain wave-based reconstruction algorithm for an ultrasound transmission tomography scanner with circular geometry. While comprehensive description of this type has already been given elsewhere, the focus work is on some practical issues arising approach. In fact, methods suffer from two major drawbacks which limit their application in setting: convergence difficult to obtain and computational cost prohibitive. address first problem by...

The present paper describes the technological solution for obtaining Cu, Zn, Pb, and Ag from jarosite waste raw material, with its simultaneous separation In Fe. By roasting at low temperatures, iron was transformed Fe2(SO4)3 form into Fe2O3, which is insoluble in water slightly soluble acid. Copper sulfate zinc are as sulfates. During temperature roasting, copper were still of CuSO4 ZnSO4, i.e., they easily dissolved water. This procedure led to good selectivity Cu Zn compared After...

The intent in this paper is to define how the batch equilibrium results of copper removal from a synthetic solution on natural zeolite can be used for prediction breakthrough curves fixed-bed system both and wastewater. Natural Vranjska Banja deposit, Serbia, has been fully characterized (XRD, chemical composition, DTA/TG, SEM/EDS) as clinoptilolite with cation exchange capacity 146 meq/100 g. maximum adsorption (qm) mono-component (synthetic solution) obtained using Langmuir isotherm model...

The processing of zinc ore using hydrometallurgical methods leads to the formation and accumulation a by-product called jarosite, which contains concentrated precious metals. In this study, we propose recovery its separation from Cu, Zn, Fe, Pb, Ag. This study also presents proposal for new technological procedure jarosite treatment. First roasted then calcine collected was leached in water. leaching extraction values obtained were 91.07%, 91.97%, 9.60%, 100.0%, respectively. Following...

There are many sources to increase value in an integrated mining–metallurgy context. The optimal strategy for concentration of minerals from the ore is one these sources. elements mining-metallurgy operations resources, infrastructure, mining site, processing, and metallurgy mutually dependent, reinforce interact positively with each other generate a combined greater than sum their individual contributions. Bioleaching technology alternative processing treatment low-grade sulphide ore, its...

Accurate calibration is a requirement of many array signal processing techniques. We investigate the transducer using time delays. derive strategy based on mean square error criterion and discuss how delays that are not available can be interpolated from existing ones. The proposed method made robust to noise model mismatch by means novel iterative technique for distance matrix denoising. convergence proved. Finally, accuracy algorithm assessed both in simulated scenarios experimental data...

Mining is the process of extracting a naturally occurring material from earth to derive profit. Whether company make profit or not depends on many economic parameters, among which most important are metal prices world market and realized operating costs in exploitation. This work presents influence copper price change value generated cash flows, i.e. profit, case open pit South District, operates within Copper Mine Majdanpek, Serbia.

Beech forests were first protected under the World Heritage Convention in 2007 as Primeval Forests of Carpathians (Slovakia and Ukraine). After two latter extensions 2011 2017, Natural site is currently named Ancient Other Regions Europe (Albania, Austria, Belgium, Bulgaria, Croatia, Germany, Italy, Romania, Slovakia, Slovenia, Spain Ukraine) consists 78 component parts 12 European countries. It aims to ensure preservation beech gene pool, ecosystem species diversity forests, their future...

Reducing the costs of repairing concrete structures damaged due to appearance cracks and reducing number people involved in process their repair is subject a multitude experimental studies. Special emphasis should be placed on research involving industrial by-products, disposal which has negative environmental impact, as case presented this paper. The basic idea was prepare mortar with added granulated blast furnace slag from Smederevo Steel Mill then treat artificialy produced Sporosarcina...

Nowadays, there is an increasing tendency that fly ash from thermal power plants not only considered as a waste material burden, but important secondary raw can be useful applied in various branches of economy. Therefore, this paper gives description the main characteristics ash, well its chemical, mineralogical composition and morphological composition. Depending on those factors, possibility usage depends. In addition, presents some standard norms prescribed by national international...

This paper presents the development and validation of five different soft computing methods for flotation performance prediction: (1) two models based on fuzzy logic (Mamdani Takagi-Sugeno inference system) (2) three artificial neural networks. Copper content in ore feed, collector dosage rougher scavenger circuits, slurry pH circuit frother consumption were selected as input parameters to estimate copper grade recovery final concentrate, well tailings plant. The training evaluation proposed...

Unique marshland area in the Danube floodplain - Special Nature Re?serve Gornje Podunavlje is considered to be one of last aquatic flora and fauna refuges region. The revitalization projects SNP started 2011. They were conducted order protect biodiversity provide natural ecosystem. aim this study was investigate compare present diversity distribution charophytes five ponds SNR Podunavlje, depending on phases process within ponds. researched includes following ponds: Semenjaca, Sarkanj,...

This paper presents the results of laboratory investigations performed in order to determine possibility improving pozzolanic activity coal fly ash from two Serbian Thermal Power Plants. The initial samples were treated by different physical processes (mechanical activation, grinding and classification). On obtained samples, was determined using standard methods (with lime Portland cement). It found that above procedures can significantly improve ash, best achieved when mechanical activation...

Transport of ore and overburden at the open pit mines represents most important complex process in excavation technology. organization significantly affects capacity machinery for disposal, productivity, as well production costs. This paper describes an attempt to select suitable transport system from safety quality point view. For that purpose, EDAS method was used. Four types systems were considered - truck transport, railway belt conveyor hydrotransport. It found that, above mentioned...

The current trend in comminution energy consumption shows an increasingly upward projection, which is likely to escalate into the future due need grind ores, are rapidly becoming low-grade and fine-grained, finer for liberation. Among higher capacity unit technologies grinding, SAG mill grinding has proven over years be attractive preferred technology highly effective ore a concentrator. major acknowledged advantage of mills massive throughput that can achieved through single unit. ability...

In order to determine the thickening parameters of definitive copper concentrate from Borska Reka deposit, which was obtained by flotation process, a sedimentation experiment conducted. The solids content at beginning test 30%. results showed that precipitated 55% an adequate rate. At such favorable deposition rate, small specific surface area thickener is necessary.

Fungi, as a separate group of organisms, have only recently gained importance in nature conservation systems both European countries and our country. The Rulebook on declaration protection strictly protected wild species plants, animals fungi is by-law which, among other species, protects rare endangered fungi, more precisely 38 26 species. relatively small number under legal Serbia does not correspond to the great diversity this organisms nature. Institute for Nature Conservation Serbia,...

Europe is heavily dependent on imports the raw materials (RM) and needs to increase a domestic supply ensure global competitiveness of its manufacturing industries accelerate transition resource-efficient, sustainable society. Demand for resources will due population growth, industrialization, digitalization, growing demand from developing countries climate neutrality with metals, minerals biotic materials, used in CO2 lowemission technologies products. The RMs are essential EU industry at...

This paper presents a description of dewatering screen construction and its working principle, as well an example application in the process dense media separation. In addition, calculation method one is given, based on realistic assumed parameters.

This paper presents a description of banana screen construction and its working principle, as well an example application in the process dense media separation. In addition calculation method one is given, based on realistic assumed parameters.

Development of mining works at the South Mining District Majdanpek in following short-term period requires removal water, sludge and sediment from water collector on open pit bottom order to create necessary exploitation spatial conditions for undisturbed operation equipment. This paper presents technology inactive pit, which is a condition maintaining continuity copper ore processing Copper Mine. The designed aspect ensuring maximum safety people