The article presents the investigation results of the anti-corrosion activity of two-component aminocarboxylate systems based on organic acids and amines in tap water relative to steel ST3SP2-GP2. 126 systems obtained from 9 organic acids and 14 amines at concentration of 1·10-3 mol-1 were tested. Investigation was performed with steel specimen weight loss assay. It has been found that such systems have a wide range of protective effectiveness. A number of dependencies of the protective effect on the type of compounds used to obtain anticorrosive compositions have been revealed. Both aromatic and aliphatic acids and amines were tested in this work. Among them, mono-, di-, and tribasic acids, as well as amines with one and two amino groups, including N, N-substituted ones, have been also studied. The concentration dependence of the rate of inhibitors has been studied. Corrosion protection using inhibitors is one of the most promising methods that have found application in world practice. Corrosion resistance caused by inhibitors is the result of physical and chemical adsorption of ions and molecules of organic substances on the surface of metals. Various types of organic compounds are widely used as corrosion inhibitors to protect materials. The most effective inhibitors used in industry are organic compounds, which mainly contain oxygen, sulfur and nitrogen atoms and have numerous bonds in their molecules, due to which they are adsorbed on the surface of metals.

This paper presents the results of studies of the thermal properties for charge materials investigated for the smelting of a ferroalloy with titanium by the carbothermal method. The following charge materials were involved and studied in the work: ilmenite concentrate from the Shokash deposit (Aktobe region, Martuk district), high-ash coals, indispensable for domestic purposes for their intended purpose. Derivatographic analysis was used to study the thermal properties of the charge. To compare the electrical resistance of coals in order to select an effective reducing agent, in this work, measurements of the electrical resistance of high-ash coals from the Saryadyr, Borly and Ekibastuz deposit were carried out. As a result, it was found that for the smelting of a new complex titanium-containing ferroalloy, high-ash coal from the Saryadyr deposit is most applicable.

Million tonnes of tailings are formed in the world each year due to increasing mining activities along with the increase in need for raw materials. The tailings may cause important environmental problems. Therefore, tailings management is very important issue in mining operations. In recent years, with the developing technology, the new tailing disposal technologies such as paste and using geotextile materials have increased considerably. These methods have many advantages in terms of both environmental and cost reducing. Another important issue in terms of mining is the accidents and occupational health problems in underground coal mines. The problems can be described as spontaneous combustion, roof collapse, gases extraction from coal bed, and etc. These accidents have been significantly reduced with use of mining chemicals in underground mines. In this study, tailing management and mining chemicals which are very important in terms of mining applications are examined.

Based on stock and published materials, the article reveals some potential of the earth's interior of the Republic, showing the possibility of expanding the mineral resource base of existing mining enterprises by re-evaluating and re-evaluating near-surface and searching for new deposits of medium and deep depths. In the future, the creation of new territorial industrial complexes in some ore regions of Kazakhstan on the basis of approved reserves and predicted mineral resources is not ruled out. It is noted that: for copper, in addition to porphyry copper, there are great prospects for identifying cuprous sandstones and shales; according to the iron-estimation, numerous geological and geophysical anomalies are insufficiently or not studied at all, which have prospects for the search for deposits of both small, medium and large depths; in a chrome way, it is recommended to perform a reinterpretation of materials on the area of a large number of outcrops of ore bodies, collapses and ore occurrences and consider them as criteria for prospecting for either deep deposits or placers; for bauxite raw materials, significant reserves are predicted in areas of known deposits and ore occurrences, certain reserves can be identified in deposits of mining and mining and chemical raw materials and, most importantly, analyze materials on depressions with coal deposits, under which large and super-large (unique) Al2O3 resources, as well as pay special attention to non-bauxite aluminum raw materials, where the researchers predicted billions of Al2O3 reserves. It is concluded that existing and newly created enterprises will be provided with raw materials for many years.

In this work, the task was to investigate the processes of microstructure change occurring in relatively large bulk bars under the action of large plastic deformations. Such large levels of deformation are usually achievable in high pressure twisting of small flat disks, but are difficult to achieve in large bulk bars. The method of radial shear rolling makes it possible to achieve comparable ultrahigh degrees of deformation (~ 45 mm/mm) in combination with the vortex flow of the metal. Sequential rolling of the E110 zirconium alloy was carried out under extreme conditions on 2 radial shear rolling mills with a total reduction in diameter ε = 185% and a maximum accumulated deformation = 46 mm/mm. To assess the level of deformation and its distribution over the section, FEM modeling was carried out in Deform-3D. The resulting structure was studied by electron microscopy (TEM/SEM). A detailed cross-sectional study of the EBSD structure was performed with a resolution of 1 mm. A gradient structure with a predominance of an equiaxed ultrafine-grained structure was found, which was not very pronounced compared to the use of smaller deformations.

Expansion of the fields of application of molybdenum and its compounds of high purity requires the study of their various purification methods. The paper considers low-temperature chlorination of technical molybdenum dioxide, purification of the gas mixture from impurities in the filter system, condensation and dissolution of purified molybdenum oxychloride compounds in water. On filters made of tableted sodium chloride, gaseous molybdenum dioxide is purified from aluminum, iron, chromium and nickel with the formation of low-volatile compounds. The capture of silicon by this filter was not detected. Purification of tungsten on filters of granular molybdenum oxide practically does not occur. Purified molybdenum oxychloride compounds are desublimated in the form of compact and fluffy products with an underestimated chlorine content relative to the stoichiometric composition of molybdenum dioxide. Compact molybdenum oxychloride compounds dissolve in distilled water with little or no precipitation. When dissolving fluffy compounds of molybdenum, a tangible precipitate is formed, into which a significant part of the impurities passe

The paper presents the results of scientific research, which are the basis for the development of technology for producing high-carbon ferrochrome using a qualitatively new reducing agent in the charge - high-ash coal from the Saryadyr deposit. To analyze the carbothermal reduction of chromium, the method of full thermodynamic modeling (TTM) of metallurgical processes was used, implemented in a computer system using the HSC Chemistry 6 software package, in the temperature range of 600-2800 K. The thermodynamic calculation showed that sharp technological deviations in the smelting of carbonaceous ferrochromium is not observed using high-ash coal, the process proceeds evenly, with complete reduction of chromium and iron. According to the content of silicon oxide and aluminum in coal ash, it was found that it can successfully replace quartzite in the charge mixture. On the basis of thermodynamic data, experimental studies of the technological process of smelting carbonaceous ferrochromium using high-ash coal Saryadyr in the Tamman high-temperature laboratory furnace were carried out. The Tammann Resistance Furnace is a research facility designed to simulate metallurgical processes at high temperatures. In laboratory studies, prototypes of carbon ferrochrome were obtained, which meets the requirements of the Fh800 brand.

The growth in the capacity of enterprises for hot-dip galvanizing of steel products has led to the formation of large volumes of waste, which accumulate and store, occupying large areas. Further use and processing of ash is constrained by the increased content of Pb, Fe, Cu and other impurities in it, as well as the lack of rational processing technology. In this work, based on the thermodynamic analysis of the reactions of interaction of impurity metals with chlorinating reagents (CaCl2, NH4Cl), the possibility of obtaining pure zinc in the process of melting the metal component of the ash is shown. It has been established that the values ​​of the Gibbs free energy (∆G°T) of the reactions of interaction of metal-impurities with ammonium chloride in the temperature range 400...550°С are four times higher than the values ​​of ∆G°T of the reactions of interaction of metal-impurities with calcium chloride. It is shown that the use of NH4Cl as a chlorinating reagent destroys the zinc oxide film covering the surface of small drops of metallic zinc and creates favorable conditions for their enlargement. This increases the yield of zinc to the liquid metal. The influence of the consumption of CaCl2 and NH4Cl on the sublimation of lead and iron from a metallic liquid bath of zinc in the form of chlorides has been studied. It was found that when the metal component is melted together with a consumption of 2% NH4Cl based on the weight of the initial sample, the minimum content of lead and iron in liquid zinc is achieved: 0.06% Pb and 0.01% Fe. The optimal technological parameters for melting the metal component of the ash together with NH4Cl were determined: temperature of experiments 450°С; melting time 60 min; consumption of NH4Cl - 2.0% of the weight of the original sample.

This article is devoted to the development of a simulation model for determining the coordinates of air objects based on the GNSS navigation signal reflected from the air object and received on the antenna of the navigation receiver. To solve the problem of radar of aerial objects using bistatic location based on the use of GNSS satellites, it was necessary to pre-evaluate the energy or energy potential of the satellite navigation signal reflected from the aerial object, which then comes to the receiving antenna of the navigation equipment of consumers. The results obtained in the form of the developed computational schemes will form the basis of the algorithmic and software of the passive radar system and will allow determining the requirements for its technical support carried out within the framework of the grant project of the Ministry of Education and Science of the Republic of Kazakhstan No. AP09260581. In this paper, simulation modeling is understood as such an approach to modeling complex systems, which allows us to develop a single meta-model that combines into an integral set of models of objects and processes of their interaction based on a single information and event space in a single discrete time scale, and implement the resulting meta-model in an electronically equivalent form on an electronic computer. One of the main tasks of the study of complex radio engineering systems by modeling is the choice of modeling principles that should allow the construction of the simulated system in accordance with the goals and objectives of the study in such a way that the model adequately reflects the processes and patterns of behavior of the system under study with the necessary degree of reliability and detail. One of the most productive methods of developing a software and hardware complex of simulation modeling is object-oriented modeling.

The focus of the article is on the characterization of low-grade Chilisai phosphorites through a comprehensive analysis of their physicochemical properties. The structure of phosphorites of this deposit was studied using modern instrumental methods, including chemical and energy-dispersive analysis, IR-Fourier spectroscopy, X-ray diffraction analysis and mineralogical analysis. According to the results of chemical analysis, the material composition of nodular phosphorites was determined, and the elemental mass composition was determined by the method of energy dispersive analysis. The qualitative composition of low-grade phosphorites was determined by IR-Fourier spectroscopy. The combination of these research methods gave a comprehensive idea of the material composition and quality of the studied samples. This study provides valuable information on the low-grade Chilisai phosphate rock and its suitability for processing into phosphorus-containing products.