This article presents the results of a research of the influence of the electrical characteristics of the current lead on the technical and economic indicators of ferrosilicochromium smelting. The parameters of the operation of the furnace No.43 of the Aksu Ferroalloy Plant in connection with the change in the characteristics of the current lead during the modernization of the EPU are considered. According to the experimental results of calculations, the power Ru, the composition of the metal and slag from the production of ferrosilicochromium are have great importance, almost with a rare use of the electrical resistance of the solid charge and the electrical resistivity of the slag, regardless of the readings of the sensors and the electrical parameters of the current supply. When using computational computer-computer programs (CRP), eleven modes of network operation are used. In this paper, mode 10 is closest to the production mode. According to mode 10, the electrical parameters of the current supply have been improved. According to the conditions of experimental calculations, the power Ру, the compositions of the metal and slag of ferrosilicochromium production remain constant. Modernization of a short network and an increase in the deepening of electrodes into the charge led to a decrease in Rу to 0.945÷0.958 mΩ and secondary voltage Uл to 155 V, to a decrease in the SiC content in the slag to 15.1 and a decrease in flyoff SiО2 to 67.0÷68.6 kg/t. The deepening of the electrodes with their reduced fit increased the furnace productivity to 79.8 t, and the specific power consumption decreased by 870 kW/h·t.

In Kazakhstan, there is a growing demand for oil and gas pipes and general-purpose pipes made of steels with high performance properties, high-quality blanks for mechanical engineering and structural steel for construction. The work was carried out within the framework of the Targeted Financing Program, in which, as one of the most urgent, the task was set to expand and improve the range of steel products of steel-smelting enterprises, which are in demand, first of all, in the domestic market. Some questions on microalloying with molybdenum and titanium are considered. The article presents the main results of experimental heats to obtain high-strength structural steel with titanium and molybdenum. Metallographic studies of experimental laboratory samples were carried out using an Olympus 51ВХ (TRF) light microscope. The metallographic analysis of the studied samples showed that the base steel 09G2S of the current production has a ferrite-pearlite structure. The grains have an acicular structure (the formation of polygonal ferrite) and correspond to 5-6 points. At the same time, heterogeneity is observed. The results of the study of laboratory samples alloyed with molybdenum and titanium (sample No.1 and No.2) confirm the effectiveness of the impact of microalloying elements on grain refinement, which is due to the release of a significant amount of carbonitrides of the type (MoCN, TiCN) along the grain boundaries. The microstructure of both samples consists of two well-defined phases - ferrite and pearlite, and the grain size corresponds to 7-8 points.

The physics and technology of noncrystalline materials is one of the rapidly developing areas of condensed matter physics, materials science, and nanotechnologies. Among the variety of materials with a non-crystalline structure, a special place is occupied by the class of chalcogenide glassy semiconductors (CGS) with unique properties and phenomena, such as the switching effect, photostructural transformations. The switching effect is observed in thin CGS films and is associated with a fast-reversible phase transition of the structure from the glassy state to the crystalline state under the action of voltage pulses or laser radiation. Based on this effect, a separate class of information carriers has been formed for non-volatile storage devices such as PCM (Phase Change Memory) with high performance and reliability. Materials for use in PCM devices are CGSs of complex compositions lying on the GeTe-Sb2Te3 quasi-binary boundary, and thin films of Ge2Sb2Te5 composition are the most promising for use in PCM devices. The ability to control the electronic properties of such functional materials based on CGS significantly expands the scope of their application and is an important scientific and practical task, since traditional methods for purposefully changing the electronic properties of crystalline semiconductors, such as doping during synthesis or the thermal diffusion method, turned out to be ineffective for CGS. Impurities introduced into CGS at low concentrations by the methods indicated above usually do not show electrical activity, since they are compensated by their charged structural defects, and an increase in the impurity concentration leads to significant crystallization. In this work, the atomic composition of Ge2Sb2Te5 nanosized films with a bismuth content of more than 12 at.%, obtained by ion-plasma deposition in the direct current mode, was studied by the method of energy dispersive analysis using a scanning electron microscope. In addition, the current–voltage characteristics of the samples were measured. It has been found that the transition voltage and the time, which characterize the switching and memory effects, depend significantly on the film thickness and composition. The addition of bismuth reduces the film switching time. A decrease in the film thickness leads to a decrease in the threshold voltage Uth and the switching time. We believe that the results of this work are useful for the development of optical memory based on phase change materials.

Nowadays the boundary parameters of reservoir identification are expanding due to the scientific and technological progress which cause in the improvement of field development technologies and the creating of new EOR (enhanced oil recovery) methods. Usually new oil fields are presented by low-permeable rock with complex geological structure which results in demand of updated analytical tools, because existing methods of oil displacement characteristics construction annually loses its relevance. The aim of this article is to present new methodology of operational evaluation of recoverable oil reserves both for terrigenous and carbonate reservoirs, which considers the difference and features of poroperm properties of reservoirs. This methodology is based on special core analysis and relative permeability curves which are less time-consuming comparing to 3D simulational model. The fractional flow curve was used as a basic tool which operates current water saturation as reserves recovery and phase permeability, as equivalent to water cut. Modifying these parameters makes it possible to predict the flow process and reserves recovery. The comparison of obtained results with the results of applying traditional methods shows a high level of forecasting reliability, since the retrospective forecast was fully confirmed by historical development data.

On the basis of 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 reassessing and reassessing near-surface and searching for new deposits of medium and large depths. In the future, the creation of new territorial industrial complexes in some ore regions of Kazakhstan on the basis of approved reserves and projected mineral resources is not excluded. It is noted that: for copper, in addition to copper-porphyry, there are great prospects for identifying coppery sandstones and shales; according to iron assessment, numerous geological and geophysical anomalies that have not been sufficiently or not studied at all, which have prospects for searching for deposits of both shallow, medium and large depths; It is recommended to reinterpret materials over the area of a large number of ore body outcrops, collapses and ore occurrences and consider them as criteria for prospecting for either deep deposits or placer prospecting; for bauxite raw materials - significant reserves are projected in areas of known deposits and ore occurrences, certain reserves can be identified in deposits of mining and mining chemical raw materials and, most importantly, analyze materials on depressions with coal deposits, under which large and super-large (unique) Аl2О3 resources can be concentrated, as well as pay special attention to non-bauxite aluminum raw materials, where researchers predicted billions of dollars in reserves Аl2О3. It is concluded that existing and newly created enterprises will be provided with raw materials for many years.

In the article, the influence of fluxing additives on the kinetics of the process and the yield of the alloy is investigated. It has been proven that the use of fluoride salts, in particular CaF2, in an amount from 15.0 to 18.0% contributes to an increase in the burning rate of the charge, the formation of mobile liquid slags that improve phase separation; at 6.7-8.0%, the maximum yield of the alloy occurs. The features of the use of fluxing additives in aluminothermic processes, the dependences of the charge burning rate based on the B2O3-Al system on the amount of flux were determined. The choice of a flux and the determination of its optimal amount, which provides the necessary physicochemical properties of the slag melt, which contributes to the formation of an ingot of aluminum borides, more complete phase separation, were carried out, experiments were carried out using: calcium oxide, fluorspar, potassium chlorides, potassium tetrafluoroborate in various combinations. The effectiveness of using potassium tetrafluoroborate as a fluxing additive mixed with fluorspar to increase the yield of the alloy and increase the boron content in it is analyzed.

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.