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Mineralogical and geochemical features of ores played an important role in typification of gold mineralization of the Verkhneamginskiy area, which includes the Khatyrkhay and Khokhoy ore fields. Association of elements is represented by Au, Ag, Cu, Bi in the Khatyrkhay ore field. The mineral composition of ores - pyrite, hematite, chalcopyrite, tellurobismuthite, less common - native gold, galena, sphalerite, bornite, greenockite, hessite, tennantite, bournonite. Supergene minerals are goethite, hydrogoethite, cov...

During High Carbon Ferromanganese production as well as other reduction processes, the chemical composition of the feed plays a crucial role on the quality of the products. It is believed that the reduction from high manganese oxides to their lower oxides during HCFeMn production, the transitional phases that form in the prereduction zone and reduction zone are very influential on the coke-bed zone behavior. Data on acidic manganese ores use are available. However, on the basic manganese ores especially the South ...

Investigations on coke-bed relations with acidic manganese ores have been reported number of times. The correlation between the mineralogy, property, reactivity of the ore and the products during the production of high carbon ferromanganese have been reported. A theoretical study has proven that the energy consumption of different basic South African manganese ores were very dependent on the chemical composition of the feed. This has a direct impact on the phases that form in the prereduction, reduction and conseq...

Due to depletion of high-grade ores, high cost of mining and environmental issues, many mines have reverted to retreatment of slags. The recovery of Nickel from reverberatory furnace slag using sulfurization and flotation was studied. Critical parameters such as sulfurization temperature, sulfurization agent (Gypsum containing 86.87% CaSO4) dosage and time were investigated for the sulfurization process and effect of collector type and dosage, pH, particle size and flotation time for the flotation process. It was ...

It has been observed that during high carbon ferromanganese using South African ores, some practices do not find an easy answer from the theory and vice-versa. It has therefore become important to study under different reducing conditions what paths does the slag go through while forming during reduction in order to better understand its formation while higher manganese oxides are being reduced. The carbon monoxide gas amount and availability in a specific zone albeit its origin is influential and explanatory towa...

The article presents research on kinetics of sinter reduction used as a charge in the process of simultaneous smelting of zinc and lead, commonly known as Imperial Smelting Process. The aim of the study was to determine the effect of reductivity of various sinters produced from sulphide raw materials and from waste oxides on the operation of a shaft furnace. Real sinter samples from the sinter plant operating at the ISF furnace were collected for the experiment. The experiment was carried out in a resistance furna...

The treatment of model solutions containing Fe(II), Mn(II) and Ce(III) salts in the range of metal ions concentrations of 20-500 mg/dm3 was carried out at the laboratory set of water purification by low-temperature plasma discharge during the registration of changes in the Red-Ox potential and pH of solutions, the ions concentration and the emission discharge spectrum. The ions concentration was measured by atomic absorption spectroscopy. The characteristic of discharge was measured with the methods of emission sp...

Steel industry has a huge impact on the environment and the air, in particular, producing thousands of tons of gases, including blast furnace gas, gases from oxygen converter processes, coke industry gases, ferroalloy industry gases. Due to this fact, the removal of gas impurities is essential nowadays. In this paper we did the literary analysis of how to remove sulfur impurities from air emissions using different types of sorbing agents. This paper contains the researches about sorption of impurities using zeolit...

AkzoNobel?s (now Nouryon) reagents from the class of alkylhydroxamic acids were assessed as collectors to float the titanium-based perovskite minerals. Hydroxamic acids can form strong complex compounds of various structures with transiting metals, which leads to their widespread use not only in analytical chemistry, but also in mineral processing. In the series of reagents under study, in addition to the traditional octyl-hydroxamic acid, we considered hydroxamic acids obtained from natural raw materials and diff...

In technical literature many specialized scientific materials are available which treat the elimination of solids and oil from water injection, the newest approaches being oriented towards the process with low power consumption as with most modern facilities in order to improve the available technologies. For groundwater, the analyzes that are carried out are to determine the degree of pollution with liquid or gaseous petroleum products. The natural state of the underground water is influenced by the characteristi...

Tailings embankments are part of the legacy left by the intensive mining industry. These vast impoundment storages are associated with some adverse environmental and social impacts creating insecurity to the stakeholders. Mining tailings may also be a source of minerals with high grades. Reprocessing techniques may be used as an alternative solution to recover some metals and to rehabilitate these sites. A sustainable reprocessing project commits to integrated management of threefold dimension objective: economic ...

In recent years we have observed a rapid increase in the demand for rare earth elements (REEs), related to industry intensive development in the field of new technologies. The biggest producer of REEs is China, which provides global markets with more than 83% of the whole amount of rare earth elements. It is worth mentioning that China has access to rich deposits of REEs, accounting for ca 37% of these metals resources available all over the world. For this reason, alternative possibilities to obtain rare earth el...

Mineral processing products must be verified in order to develop highly effective technology of enrichment. At every stage of mineral processing - improvement is possible through monitoring and verification of the components of processes. Process control is possible, among others, through comprehensive mineralogical analyzes of ores and products of their processing. Automated mineralogy based on scanning electron microscopy technique, like QEMSCANВ® or MLA, gives opportunity to obtain complex data in a relatively ...

New efficient ways of processing mineral raw materials are one of the determinants of scientific and technological progress. In recent years, there has been a tendency to reduce the metal content and complicate the mineral composition of processed ore raw materials, and increase requirements for environmental protection. All this leads to a rise in the cost of mining and extraction of useful components. The ever-growing demand for metals leads to the need to use poor ore, deposits lying at great depths, dumps of m...

The results of refractory sorption tailings biooxidation and gold extraction from are presented. Selected of a representative sample and the phase composition of sorption tailings of the gold extraction plant LLP В«Altyntau KokshetauВ» was studied. According to the research it was found that the composition of the test sample contains Au-3.24 g/t; Ag ? 2.1 g/t. The content of sulphide minerals is 32%, when the main sulfides are arsenopyrite 22.7% and pyrite 9%.A large part of gold, which is about 68.9%,is able in ...

The article presents the results of investigations into the effectiveness of precipitating rare earth elements (REEs) from mine waters using solutions of alkalinizing reagents (NaOH, Ca(OH)2, Na2CO3), sulphur-containing compounds (sodium trithiocarbonate, sodium trimercapto-s-triazine, sodium dimethyldithiocarbamate) and oxalic acid. The investigations were conducted in two stages. In the first stage, based on initial tests, after REEs precipitation, a compound selected from the alkalinizing reagents group (NaOH) ...

In Poland, like in many other countries, research is conducted toward creating sorbent materials based on fly ashes. The present shows the synthesis of fly ash from brown coal combustion in pulverised-fuel boilers of the Be?chat?w Power Plant. The synthesis was conducted in an autoclave using the hydrothermal method with alkaline activation. The conditions for the synthesis were: temperature of 170В°C, NaOH aqueous solution. The chemical composition of the fly ash as well as the products of the synthesis was deter...

Dielectric barrier discharge is low-temperature plasma generated in cases with an dielectric material between the electrodes. The demanding applied task of water treatment is the removal of heavy metal ions, including iron (Fe) and nickel (Ni), ions, from aqueous solutions. The authors of the paper designed a plasma reactor that allows the dielectric-barrier discharge treatment of a solution near the surface of the liquid in the flow-through mode, so that this method can be used for technological purposes. The inf...

In this study, alkaline leaching using sodium carbonate and sodium bicarbonate analysis was applied on different raw samples while the raw samples were digested to analyse the uranium content prior to leaching using successively ICP-OES. The recovery of Uranium is by use of very economical alkaline leaching method. Ore samples: 1436, 1437, 1439 and 1440 were investigated for leachability of radioactive metal prior to leaching using digestion methods. Sample 1436, 1437, 1439 and 1440 assayed 918, 1883, 1757 and 121...

Sydvatten AB operates the water plant Ringsj? Agency in Stehag, Southern Sweden, and the company has since the 1970s deposited waterworks sludge in the sludge landfill at R?nneholms Mosse (bog), Sj?holmen (WGS84 55В°48'46.1"N 13В°18'25.6"E). In order to handle the produced future waterworks sludge from Ringsj? there was carried out a trenching and stratigraphic study of Ringsj? Agency waterworks sludge. The aim of the project was to roughly determine the mass balance for Fe and Al for the basis of the results to d...

Due to the depletion of free-milling raw materials the involvement of new types of deposits is the strategy of developing mining industry of Russia. The black shale raw materials show interest as a non-traditional source of precious metals since its genetic and positional gold-carbon connection. The research is aimed at solving the problem of enrichment of sulphide ores, counting for more than 40% of the reserves in Russia. The aim of the research is to develop and scientifically substantiate the scheme for proces...

The production of a titanium sponge obtained by the reduction of titanium tetrachloride by magnesium is accompanied by the formation of a huge amount of chloride waste. They are annually stored in landfills - storages, polluting the environment. Consequently, one of the topical problems of titanomagnesium production is the processing of chloride waste. In Kazakhstan, there are a variety of sources of chloromagnesium raw materials for the electrolytic production of magnesium, but they are not used in the magnesium ...

This paper presents the research undertaken in order to establish a processing technology for the Budureasa dolomitic limestone. For this, a series of physico-chemical and mineralogical analyzes were performed, but also unitary processing operations such as grinding, calcination, gravitational concentration and flotation, and solubilization with carbon dioxide in an aqueous medium to obtain a MgO ? rich concentrate, usable in various fields of activity, under economic efficiency conditions. Mineralogical, chemical...

Inclusions in diamond associated minerals are additional information about the formation of minerals in the depths of the mantle. Considerable attention is paid to the study of rutile inclusions in garnets in literature. Until now, there is no consensus on formation of oriented needle-like inclusions, some authors consider them to be epitaxial intergrowths, others ? exsolution. This article contains results of the study of eclogitic garnets from heavy fraction of diamondiferous volcanogenic sedimentary rocks of th...

The Power Plant Ostroleka is one of many in Poland, which is coal-fired. Fly ash, as is well known, are combustion by-products, which are mineral residue from burning coal. Their phase composition depends mainly on the quality of fuel (coal) and combustion conditions. In the mineral composition of the examined ashes one has identified minerals such as: glass, quartz, mullite, spinels, hematite. Spinels present in the fly ash can be a source of some metals, and due to the magnetic properties of some of them, are ea...

The properties of materials obtained during the thermal treatment of gypsum depend on structural defects in the multiphase gypsum-anhydrite system. Analysis of the crystal structures of gypsum (CaSO4В·2H2O), bassanite (CaSO4В·0,5H2O), ?-anhydrite (?-CaSO4) and natural anhydrite (?-CaSO4) allowed us to identify a common structural motif in each of these structures. This is an irregular hexagon formed by chains of ?Ca?SO4?Ca?SO4?. During successive thermal transformation of gypsum into anhydrite, this structural mot...

The temperature makes considerable impact on gold-bearing minerals decomposition. So, by the Russian scientists on an example of May deposit concentrate it has been shown that the increase in temperature of a pulp to 34 - 36В°? intensifies oxidation of gold-bearing mineral - arsenopyrite: after the lapse of 48 hours oxidation degree arsenopyrite reached 95%. On the basis of studying kinetics biooxidation of sulphidic minerals by microorganisms association at various temperature modes in some research institutes of...

The energy security, the energy market and the climate change strategy characterize the current times. This forces us to seek new technologies and to modernize and intensify old technologies. The current strategy also significantly affects the blast furnace iron production and subsequently the production of agglomerate. Agglomerate production is closely related, from the ecological and energy points of view, with the production of coke, which is the basic fuel component of the agglomeration batch. That is coke bre...

In parallel with technological and scientific developments in the world, people's choice on the materials is changing. In the light of these developments, mankind's environmental awareness is also increasing and thus the people aim to live in natural environments. In recent years, natural stones have started to be used widely especially inside and outside of the buildings in big cities in Turkey and the world. The low block efficiency of rocks caused to move the production of artificial stone in the construction s...

Lithium, the alkaline metal, causes a great excitement in scientific as well as in media scene. His lithic mineral zinnwaldite attracts great attention to a deposit in CпїЅnovec in Ore Mountains. A lithic locality can be found in the Northern Bohemia and it is well-known due to its sources of ore raw material for years. Tin, silver and wolfram were extracted here. Lithium was not utilized in the past and that is why it sometimes happened that a greater part containing lithium was not used. However, this was change...

Deposits located in the region from Ostrov up to Chodov are mainly known for their high quality deposits of kaolin non-metalliferous raw materials. Among others, the deposits contain a large amount of micas that are not used within production of kaolin concentrates. Within their structure, these micas can contain metals of alkaline soil - lithium, rubidium or cesium in particular. Due to new technologies, these metals get the greatest focus and their sources are being looked for all around the world. In the first ...

With the current situation in world economy, rare earth elements are a valuable resource for many innovative technologies. Low supply of these elements and sparse mining sources concentrated in just a few countries caused REE to become a resource critical to the development of many high-tech branches of the industry. Although rare earth elements are widespread in the nature, due to their low concentration in most minerals, their processing based on flotation, gravity or magnetic separation of a concentrate is ofte...

Using of HCAC as a clearing material of hydrometallurgical productionпїЅs effluent. Hydrocarbonoaluminate of calcium is synthesized in the system CaO-Al2O3-Na2O-CO2. Such system is characteristic for high silicon content aluminum raw on alumina processing plants by sintering method as desilication reagent. By this method aluminatesпїЅ solution decomposition conducts by carbonization receiving of aluminium hydrate and sodium liquor. HCAC has developed surface, neutral pH, which let us using it as clearing material ...

The possibility to use complexing reagents-collectors in floating different rare-earth and rare-metal ore has been studied. A prognostic assessment has been performed of efficiency of organic heteropolar compounds as flotation reagents-collectors on the basis of moleculeпїЅs energy parameters. The interaction has been considered of rare-earth and rare-metal minerals such as eudialite, zirconium, loparite and columbite with complexing reagents. Gain in energy (??) has been calculated by computer modeling at formati...

In the present study it was evaluated the capacity of molasses for removing seven metals (Fe, Zn, Cu, Cd, Cr, Pb, and Ni) from three types of waste: galvanic sludge (pH = 7.1 пїЅ 7.8), mineral residue from a lead metallurgical plant (pH = 5.0 пїЅ 5.8) from Baia Mare (Romania), and tailing pond residue from Aurul - Baia Mare (pH = 2.1 пїЅ 3.0). Several leaching tests were conducted in the laboratory in order to investigate the influence of molasses concentrations (0 %, 1%, 5%, 10%) on heavy metal leaching. It was o...

Carbonaceous overburden rocks carry a heightened metallogenic potential. The possibility of extraction of valuable metals from natural bitumens and overburden rocks of oil fields is considered. The results of mineralogical and technological researches of samples are presented. The analysis of sample has shown an increased content of valuable microelements in some objects. All samples contain carbon of varying degrees of metamorphism. The fact of simultaneous concentration of carbonaceous rocks by several microelem...

Due to their chemical, physical and mechanical properties, niobium (Nb) and tantalum (Ta) are strategically used in various technical applications. About 130 different minerals contain tantalum and niobium, of which only about 80 are found in economical deposits. The remainder contains Nb and Ta as impurities. The most commercialised source of Nb and Ta is a columbite-tantalite ore often referred to as coltan containing pyrochlorite. The Central African Mesoproterozoic Kibara belt in Katanga (Democratic Republic o...

Asphaltite derives from petroleum origin solid fossil fuel [1]. It contains valuable elements such as chromium, thallium molybdenum, uranium etc. Chromium and thallium are very important elements both environmental and health. Chromium has an important role in the metabolism. It keeps the blood sugar level in balance. It balances the level of cholesterol. Thallium and its compounds are toxic for humans even at low doses. Poisoning causes death or permanent nervous system disorders. The development of precise and e...

The parameters of extraction from aqueous solutions into the organic phase of iron, aluminum, manganese and titanium are determined from the pH and concentration of the extractant when they are extracted with oleic and naphthenic acids, as well as olive and sunflower oils. The values of the thermodynamic functions of extraction equilibria with the participation of carboxylic acids and natural oils are taken as the basis for constructing the extractability series, which makes it possible to determine the thermodyna...

When coal preparation, particularly suitable for coking created considerable amounts of sludge. Most of the technological operations is taking place in water environment. Raw sludge at a time when technology was not yet at such a high level as today and emergency overflows were deposited in tailing ponds. This is practiced on coal districts in the Czech Republic and Poland. The purpose of this section was to analyze the possibility of another flotability of coal sludge deposited in settling ponds of company EKO CA...

History of exploitation of gold from Danube river sandy gravels is centuries long. Interesting on it continues to the 1970пїЅs. Extaction of heavy minerals (HM) concentrate was never intend. About 1 milion m3 of sandy gravels is exloited in Slovak part of Danube basin for construction usage. Production of HM concentrate with gold as by-product can improve economy of exploitation. With average content 6,55 kg of HM in m3 of sandy gravels there is possibility to produce about 6500 t of HM concentrate with up to 30 k...

The main objectives of the present study were: (1) to evaluate the impact of acid drainage, from the former Valea Vinului mine on the quality of Valea B?ilor creek and (2) to propose a treating method for the acid mine waters generated by the investigated mine. The waste waters sampled from the former Valea Vinului mine proved to be highly acidic having a pH between 3.1 and 5.2. The monthly fluctuation showed that during March 2016 and April 2016/2017 the waste waters were highly acidic. The acidic mine waters had...

In the present scientific work assessed current status of question about grinding stage effect to electrochemistry parameters of operation preparation slurry before intermediate selective flotation. Showed needs of more detail study chemical reactions in the slurry preparation and flotation processes.At example of Abiz deposit ores has been offer new methodology. The ores are polymetallic sulphide type and the one are most difficult for mineral processing. The methodology allows increase information base during fl...

Currently applied groundwater protection against penetration of pollutants from landfills are membranes that isolate the layer of stored waste from the substrate. As the material most commonly used are materials such as loam and natural clay or composite materials, such as plastic films or asphalt. Also there are known methods of using waste materials such as fly ash, as well as silicate-ash composites for the manufacture of seals in civil and hydraulic engineering. Literature also contains descriptions of the res...

The effectiveness of using different beneficiation techniques of low-grade iron ore deposits of Assen iron ore mine in Thabazimbi, South Africa has been investigated. The sample received was confirmed to be low grade haematitic iron ore containing (39.18% Fe and 40.29% Si) both lumps and fines. The most abundant gangue present was silica. The different beneficiation methods such as shaking table, drum magnetic separation and reverse flotation were compared on the basis of which one yields a better grade that can b...

The paper presents comparative studies aimed at reducing labor costs of Bond Ball Mill Work Index test (BWi) by using a number of alternative techniques. Methods of Ahmadi and Shahsavari, Berry and Bruse, Gharehgheshlagh, Horst and Bassarear, Kapur, Magdalinovich, a standard Bond test with feed sizing into limited size grades, and a standard Bond test with grain size analysis of subsamples of milled product were compared. Magdalinovich-Ahmadi and Kapur testing techniques were modified. The modified Magdalinovich-A...

Selective collector "polyfunctional reagent" consisting a mixture of butyl xanthoenate, N-allyl-o-izobuthyl-tiono-karbamat (TC-1000) and aerofloat composition in a ratio of 1: 1: 2 was selected on the basis of comprehensive research. Their colloid-chemical properties (surface tension, adsorption at the water-air wetting) was studied. Also colloid-chemical properties and ability flotation of sulfide monominerals with the usage of basic and multifunctional flotation reagents was evaluated. Furthermore flotation of s...

The coal mining has been carried out coal mine since 150 years in the Turkey/Manisa-Soma. It has been determined that about 800 million tonnes of lignite reserves (ranging in calorific value from 2.500 to 4.500 kcal / kg). Turkey/Manisa-Soma-Karanlikdere underground lignite coal is one of the highest reserves in Turkey and having about 5300 kcal of energy with quality and enrichment. Coal is contains very clay and abundant fossils. Limestone, sandstone and claystone are also frequently found. As the coal goes from...

The Rare Earth Elements (REE) have been classified as resources critical for the European Union and divided into: light rare earth elements and heavy rare earth elements. The demand for REE is constantly increasing, which is connected with the wide range of their applications. The article presents the results of research conducted to determine the concentration of Rare Earth Elements in fly ashes obtained from the combustion of coal at the Rybnik Power Plant. The concentrations were measured using the ICP-MS and S...

Slag is one of the by-products of energy industry which is suitable for secondary industrial processing. Although slag has been successfully used in industrial production for several decades its use does not achieve the level of its potential. This work describes the improvement of mechanical properties of alkali activated binders пїЅ geopolymers made of slag. The effect of mechanical activation on mechanical properties of geopolymers was examined. Mechanical activation was made with ball mill and different time o...