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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 ...

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...

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...

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 ...

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...

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...

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...

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...