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The possible efficient application of Karelia?s talc-bearing rocks is assessed. Two groups of talc-bearing rocks: 1) talc ores subjected to flotation dressing for talc production and 2) soapstone containing chlorite, which, like talc, forms foliated-imbricate aggregates and is hard to separate upon dressing. High-quality reagent-free micronized concentrate (microtalc), which can be used for the production of technical rubber articles, plastics and ceramics, was produced using a flow chart developed for Svetloozers...

A promising source of Rare-Earth Metals (REM) is the mine refuses of Obukhov deposit?s zircon concentrate, which contain 3.53% of the sum of REM oxides. Chlorination is an effective method for transferring metals from crude ore to chlorides convenient for subsequent separation, purification and production of marketable products. The advantage of such method is absence of sewage and discharge of harmful substances into the atmosphere, which is an effective measure for environmental protection. The paper performs a ...

The electro-dialysis of copper chloride we conducted for electroplating of copper from copper chloride solutions. The concentrations of copper chloride were varied for each test (0.95g/L, 1.51 g/L and 4.51g/L). While other factors were controlled (current for each test was 0.45 A, each test was ran for 10 hours, the feed flow rate and the temperature of the make-up feed was kept constant. It was ensured that the process took place in acidic conditions. The membrane used was a microfiltration synthesized from polyv...

It was experimentally shown that using liquid nitrogen and a radioactive source, radon can be concentrated to high levels. A simple device has been proposed, that allows pre-concentration of radon at liquid nitrogen temperature. The essence of the device is based on the transformation of gaseous radon into a liquid. It is known that liquid nitrogen has a boiling point (-195,75) ??, and gaseous radon turns into liquid at (-62) ??, and at (-70) ?? turns into a solid state. Thus, the low temperature of liquid nitroge...

In paper describes the geological structure and mineral associations of the Ural emerald mines (Middle Urals, Russia) as the main source of high-quality chrysoberyl and its rare variety, alexandrite. The purpose of work is to identify the crystal chemical characteristics and nature of the color of natural chrysoberyl and alexandrite, as well as to study the comparative crystal chemical characteristics with their synthetic analogs. Samples for research were chrysoberyl and alexandrite from mica carrying rocks and p...

This paper presents geology aspects of jeweler demantoid new manifestation, which was recently discovered in the Polar Urals. The mineralogical characteristics of the manifestation are described, demantoids chemical analysis results are shown, and comparative analysis of demantoids with samples from classical Ural deposits is given. The crystal chemical characteristics of demantoids from this manifestation are studied and color origin of these garnets is investigated. Demantoid mineralization is presented in two t...

The current demand of some specific metals (alloys) in the HiTech industry has pushed researchers to increase the number of investigations to improve the quality of products on the market. Generally, coltan is a byproduct of tin metallurgy and is collected in the slag. The formation of phases in the slag needs to be investigated in order to optimize the collection of coltan in specific phases by trying different ratios in fluxes. Also, cassiterite is associated with iron ores and during smelting the iron get reduc...

Biohydrometallurgical technologies based on the oxidation of sulfide minerals by acidophilic microorganisms oxidizing ferrous iron and sulfur are widely used for the extraction of non-ferrous and precious metals from sulfide ores and concentrates including gold-bearing refractory concentrates. Microorganisms involved in oxidation of sulfide minerals differ in ability to use sources of carbon for constructive metabolism and capable of both CO2 and organic nutrients assimilation. Their activity depends on availabili...

Pyrometallurgical processing of arsenic containing polymetallic ores and concentrates poses a problem due to the emission of toxic gases. Hydrometallurgical methods including bioleaching may be used as alternative approach to treat this type of mineral raw material. To perform effective hydrometallurgical processing of mineral raw materials, factors affecting leaching efficiency should be studied. The goal of the present work was to study the effect of sodium chloride on copper bioleaching from arsenic-containing ...

The study is the first experience to assess the possibility of obtaining clean garnet material from garnet-mica schist from waste Keivy area of Kola Peninsula using electric pulse disintegration. It is shown that the fraction +0.25-0.5 almandine garnet crystal crushed using electric pulse disintegration material and after it washing upward flow of fluid contains up to 94% clean garnet.

South Africa has massive Platinum Group Metal (PGM) deposits found in Bushveld Igneous Complex (BIC). Due to depletion of Merensky reef, many companies are now treating UG2 reef which has a high chromite content which has negative impact in the smelting process of the platinum concentrates. Generally, PGMs are processed by rougher followed by cleaner and re-cleaner flotation banks and the final concentrate must contain less than 3% chromite. The effect of residence time and depressant dosage on PGM recovery and ch...

In the early 80-ies near the village of Shantobe, Akmola region, a heap leaching manufactory was built. Since 1985, the manufactory processes productive solutions, and the commercial product of the manufactory is a regenerate containing up to 40.0 g / l of uranium. This product is processed at the mining and smelting factory (SMCC) in the city of Stepnogorsk to produce U3O8 uranium oxide. The share of heap leaching accounts for 25.0% of uranium according to control No. 1. But, in connection with the difficulty of ...

In addition to general information about corundum, the work addressed questions about the material composition of corundum-containing ores in Karelia and the degree of their knowledge. Using the corundum as an example of the Khitostrov deposit, the interrelation of the strength characteristics with such factors as crystal morphology, fracturing, and the presence of mineral inclusions has been studied. The technologies of extraction and disintegration of corundum using mechanical, thermal and chemical methods of we...

The slag formation is a complex process consisting of several stages. There is the formation of liquid slag from individual batch materials. In the production of steel, the slag mode is chosen according to the type of apparatus, the type of processed pig iron and steel scrap, and the requirements for the grades of the steel produced. The paper focuses exclusively on primary slags from the steelmaking process in the oxygen converter. The amount of oxygen converter is about 120-150 kg per tonne of crude steel produc...

Froth flotation process has shown superiority in processing of many low-grade ores including iron ores. However, there is need to continue developing cheap, more selective and environmentally friendly reagents. Due to the shortage of high-grade iron ores, many companies in South Africa and other countries are currently working on the beneficiation of low-grade ores and retreatment of tailings. In this paper, the performance of Macadamia oil as a frother on the flotation of low-grade iron ore was investigated. The ...

Upper Jurassic deposits on the territory of the Tatarstan Republic are represented by the coastal-marine, terrigenous complex. In its composition, the predominant rocks are dark gray calcareous clays, among which lie thick (up to 5.0 m) layers of combustible shale and thin (up to 1.0 m) layers of silt and sandstones with signs of wave ripples. All the rocks of the complex contain inclusions of authigenic pyrite (1?4%). Jurassic sediments on the Middle Volga did not experience deep dives. Their diagenesis ended at ...

Problems and prospects of gold mining development and organizational actions to increase the economic efficiency of gold?s production in Russia are considered. Also, are proposed the methods of extracting gold from gold-bearing dumps using modern geotechnologies, reducing the cost of its extraction from the rock dumps. An important factor in the development of geotechnologies in Russia as a whole is undoubtedly the use of scientific potential for developing efficient and ecologically friendly technologies of heap ...

Oil deposits in Bashkirian strata regionally oil-saturated, within the Volga-Ural oil and gas bearing province. They contain up to 30% of hydrocarbon reserves. Bashkirian strata are represented by carbonate complexes of various lithological type. Only packstone and grainstone have properties of oil-saturated reservoirs, mudstone and wackestone are dense rocks. A characteristic feature of the Bashkirian carbonates is the wide presence of stylolites filled by greenish-gray clay minerals. It is known, that hydrocarbo...

To obtain a chromite concentrate with an acceptable silica content, it is very promising to apply the method of hydrochemical enrichment, which will make it possible to develop waste-free technology for leaching chromite ores and reduce the silica content in chromite concentrates. Before hydrochemical processing, it is advisable to apply the technology of gravity concentration. Modern gravity enrichment technologies make it possible to efficiently produce chromium concentrates from large and medium fractions of ch...

Processing of weathered material from UG2 ore for recovery of Platinum group minerals (PGMs) is a challenging task due to poor recoveries and high chromite grade in the flotation concentrates. The flotation behaviour of the weathered and non-weathered ores of Middle Group 4 (MG 4) was investigated at different mining pit depths using sodium isobutyl xanthate as a collector, Sendep 30D as depressant and Senfroth 200 as a frother. The milling tests work were conducted prior to flotation. The results depicted that, t...

To date, titanium and magnesium production is based on chlorine technology, which, for all its merits, is characterized by a high level of formation of industrial products and waste. In particular, ?Ust-Kamenogorsk Titanium and Magnesium Plant? JSC annually produces 30?35 thousand tons of solid chloride wastes, which contain 700?1400 tons of titanium oxide. Part of titanium chloride waste is leached with water and neutralized with calcium hydroxide to pH 7-8.5. The resulting pulp pumps are pumped into sludge colle...

This paper discusses the results from a complex laboratory studies, carried out on the lead-zinc ore from Madan ore field deposits. The Pb-Zn ore is currently processed in Rudozem concentrator, involving a sequence of three stage crushing, followed by ball mill grinding and selective lead-zinc flotation circuit. Two properties from the laboratory grinding tests were investigated: mineral liberation characteristics (batch grinding tests) and Bond ball mill work index (kWh/t). In order to determine the correlation b...

The paper presents the results of studying the technological properties of vein quartz Girvas occurrence. The mineralogical and chemical composition of the technological samples are analyzed. The distribution and composition of mineral impurities, gas-liquid inclusions in quartz are studied. When developing a deep beneficiation scheme, quartz grain sizes were selected based on the experience of enrichment of vein quartz, the size and composition of mineral impurities. Enriched quartz concentrate with a particle si...

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 ...

Rare earth metals is a special group consisting of 17 elements (15 lanthanides, yttrium and scandium), with resembling chemical and some of the physical properties. Because of their unique properties, rare earth metals are widely used in various high-tech industries, e.g. metallurgy, electronics, optics, ceramics, medicine and many others. Growth in demand for rare earth metals intensified by scarcity of their rich mineral deposits is forcing researchers to look for new sources of raw materials for production of r...

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...

Urolithiasis is one of the most frequent urologic diseases and occurs in at least 1?3% of the population, and most often in people of working age (20?50 years old). This disease is characterized by the formation and progressive growth of pathogenic mineral formations - urological (urinary) stones in the abdominal system of the kidneys, their possible migration through the urinary tract, which leads to hemo - and urodynamic disorders, the emergence and progression of inflammatory, sclerotic complications. The recog...

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...

The production of electricity and heat is based on a number of fuels, with fossil fuels being the most widely used fuels at present. Electricity is mainly produced by generating steam in boilers for the combustion of sorted fuel and feeding it to the turbine that drives the generator. Combustion plants are operated on demand and energy demand, either as large utility plants or as industrial combustion plants providing power in the form of electricity, mechanical energy, steam or heat for industrial production proc...

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...