Целью настоящей работы является исследование сорбционных свойств сорбентов, полученных на основе активированного угля (NoritRO, АКВАСОРБ) и шунгита. Эксперименты по определению оптимального сорбента проводились с цианистым раствором состава, мг/л: Au – 11,66; Ag – 2,16; Fe – 0,68; Cu – 8,45, Zn – 8,12. Установлено, что при сорбции золота с использованием сорбентов NoritRO, АКВАСОРБ и сорбента на основе шунгита, наибольшим значением емкости обладает ионит марки NoritRO. Оптимальным значением рН среды для извлечения золота с NoritRO и АКВАСОРБ явился 10, для сорбента на основе шунгита рН = 6. При проведении сорбции золота из многокомпонентного раствора с NoritRO наблюдается соизвлечение примесей металлов. При сорбции золота из реального цианистого продуктивного раствора с сорбентом NoritRO в 6 стадий степень извлечения золота достигает 96-99 %.

В статье рассматриваются вопросы разработки методики анализа вибрационных сигналов и формирования концепции архитектуры интеллектуальной системы вибрационной диагностики транспортных средств. Актуальность исследования обусловлена необходимостью повышения надежности и безопасности эксплуатации транспортных систем в условиях цифровизации и внедрения киберфизических технологий. В качестве основного метода обработки выбран спектральный анализ на базе быстрого преобразования Фурье, который позволяет выявлять доминирующие частотные компоненты и формировать диагностические признаки. Представлена экспериментальная реализация регистрации вибрационных ускорений с использованием многоканальных акселерометрических датчиков и цифровая обработка данных с расчетом интегральных и спектральных параметров. Предложенная архитектура предусматривает масштабируемость имодульность для адаптации к различным типам транспортных средств. Реализованный подход может стать основой для развития современных систем интеллектуальной диагностики в транспортной отрасли, способных эффективно предотвращать поломки и повышать эксплуатационную готовность транспортных средств.

The technology of forming a thermite alloy layer on the basis of Fe-Cr-C system on a metal basis by self-propagating high-temperature synthesis is offered, which allows to obtain cast functionallayers withphysico-mechanical and exploitativeproperties. The optimal technological parameters of the forming a wear-resistant layer of thermite alloy process are determined: the amount of metal filler with the maximum yield of suitable alloy, the heating temperature of the thermite charge and the mold to obtain additional heat, the temperature ranges of the melt to melt the metal base with further formation of the functional layer. Metallographic studies of the obtained wear-resistant layer of thermite allo[y showed that the zone of formation of the functional layer is characterized by the stability of the macrostructure and the positive effect of non-metallic inclusions in the form of Al2O3, which influences the formation of chromium carbides in the obtained alloy by creating the effect of inoculative modification of thermite alloy. © Published under licence by IOP Publishing Ltd.

The quest for cost-effective methods to process gold-bearing ores is inextricably linked to a series of preliminary studies, including ore composition analysis, evaluation of the occurrence forms of valuable components, and assessment of the impact of impurity elements and ore physical characteristics on gold recovery. Flotation remains a cornerstone technology in the gold mining industry, essential for the beneficiation of gold-bearing ores. Central to this process is the selection of flotation reagents, which enable effective separation of gold from gangue and associated minerals. This study focuses on the flotation of previously unexamined low-sulfide gold-bearing ore from the Aktobe deposit in the Republic of Kazakhstan. Mineralogical and X-ray phase analyses identified quartz, potassium feldspar, calcite, mica, limonite, and sulfides as the principal minerals in the ore. Phase analysis further revealed that 46.47 % of the gold occurs as free cyanidable gold in open intergrowths, while 37.61 % is locked within sulfides, and 15.92% is finely disseminated in waste rock. To optimize the flotation process, the influence of critical parameters such as grinding size, reagent dosages, flotation time, and flotation machine type on gold recovery was systematically investigated. Closed-circuit tests with one and two cleaner flotation stages were performed using the optimized reagent regime. The results have demonstrated that a single cleaner flotation stage achieved a 1.14 % higher gold recovery, reaching 89.84 %. The concentrate obtained after the cleaner flotation contained 23.01 g/t of gold, making it suitable for subsequent hydrometallurgical processing. © 2024, Ore and Metals Publishing house. All rights reserved.

The article theoretically justified and experimentally confirmed the possibility of implementing the process of the electric melting of Satbayevskiy ilmenite concentrates with new fluxing additives based on oxides and nitrides of aluminium, calcium, and boron. They also include boron carbonitride CNV that will expand the raw material base of Kazakhstan titanium production by involving local substandard material in the process, as well as the technical and economic performance of electric melting. In order to conduct experiments in the area of extremum, the ilmenite concentrate from the Satbayev deposit was taken. Furthermore, the optimum conditions of the electric melting of Satbayevski ilmenite concentrates (such as the process temperature of 1550–1600 °C, the reducing agent consumption of 8–10% of the concentrate mass, and the duration of 90 min), using new fluxing additives, were selected. As a result of the experiment (performed at a temperature of 1600 °C), it has been found that the introduction of 3 to 6% of fluxes in the charge of electric melting promotes the reduction of iron oxides from 45 to 80% and achievement of the extraction of titanium oxide in slag of up to 83.5–90.1%. The addition of 6% boron oxide and carbonitride in the charge of electric melting reduces the melting temperature of the charge to ~1400–1450 °C and the melting time to 90 min. It also creates conditions for a quieter electric melting mode.

Thearticlediscussesmethodsfor diagnosingthe technicalconditionof pumpingunitsusinga thermal imagerinthe operatingconditionsof JSCNACKazAtomprom.Inthe frameworkof thisstudy, we useda sampleof diagnosticinformationobtainedbythermal imagingexaminationof SULZERcentrifugalpumpingunitssubjectto a technicalconditionassessmentprocedure.A techniquefor conductingthermal imagingdiagnosticsonexistingequipmentis described.Toanalyzethe dataobtained, thermogramprocessingmethodswere usedtoidentify areasof localoverheating,indicatingpotentialdefects.The resultsof thermal imaginganalysisof bearingassembliesof pumpingunitsare presented.The conductedstudieshave made it possibleto formbasicdiagnosticsignsfor assessingthe technicalconditionbased onthermalcharacteristics,whichensuresthe creationof a singlediagnosticcriterionforassessingandpredictingthe conditionof centrifugalpumpingunits.The resultsobtaineddemonstratethe highefficiencyofthe thermal imagingmethodforearlydetectionof malfunctionsandassessmentof the remaininglifeof the equipment.This,inturn,helpsto improvethe reliabilityofpumpingunits,reducethe riskof accidentsandoptimizemaintenanceregulations.The presentedmethodologycanberecommendedforwidespreadimplementationinenterpriseswitha similartypeof equipment,aswellas usedina technicalconditionmonitoringsystemwithinthe frameworkof the predictivemaintenanceconcept.

This paper presents a ROS 2-based intelligent control architecture for high-pre cision autonomous marking. The system integrates model predictive control (MPC) with du al-camera visual servoing to achieve submillimeter accuracy. A layered control stack combines global perception from an overhead camera with local correction from a tool-mounted camera, enabling accurate six-DoF pose estimation through fiducial markers and hand-eye calibra tion. Trajectory planning is formulated as a constrained optimization in CasADi, supporting real-time motion generation under workspace and actuator limits. Implemented on a 6-DOF collaborative arm with STM32-based RS-485 motor controllers, the system achieves final er rors of 0.7 mm and closed-loop frequencies near 8 Hz. Results demonstrate the viability of combining vision and optimal control in a modular ROS 2 framework for industrial automation.

This work presents the results of thermodynamic and technological studies of the reducing electric smelting of low-quality and difficult-to-recover Satpaevsk ilmenite concentrates in the presence of sodium carbonate (Na2CO3) as a flux. In the course of thermodynamic studies, according to literature data and using the HSC Chemistry 8 program, the state diagrams of the FeO-TiO2, FeO-Fe2O3-TiO2, Na2O-TiO2, Na2O-SiO2, Ti-C-O and Fe-C-O systems and the possibility of reactions in the temperature range of 500–1600 °C (without smelting of titanium, 1678 °C), taking into account phase transitions, were studied. The article also presents the results of technological studies of the above process. In general, the research results showed the possibility of using sodium carbonate (Na2CO3) as a flux in the charge of the electric smelting of low-quality Satpaevsk ilmenite concentrates. It has been established that the addition of 4.5–5% of Na2CO3 allows for reducing the temperature and the duration of electric smelting, the viscosity of the melt, and the complete separation of the smelting products (cast iron from slag).

This article discusses the issues of increasing the efficiency of operation of pumping units by improving the methodology for calculating its reliability, using the example of centrifugal pumping units of the CM type used for pumping petroleum products. The proposed monitoring system makes it possible to obtain data on controlled centrifugal pumping units using a sufficient number of measuring channels to which vibration, temperature and pressure sensors are connected. Controlled parameters can be visualized, i.e. You can graphically represent the changes over different time intervals. The proposed monitoring system also provides recommendations for troubleshooting the centrifugal pumping unit according to sensor readings.

As is well known, one of the key problems facing modern humanity is atmospheric pollution caused by harmful industrial emissions, which negatively affect both the environment and public health. The main goal of this study is to conduct an analytical assessment of the impact of atmospheric air pollution on public health, using molybdenum production as an example. The evaluation includes an analysis of the acute toxic effects of pollutants on public health resulting from emissions of a molybdenum enterprise. The assessment of health risks caused by exposure to chemical air pollutants in the emissions of molybdenum mining enterprises revealed that the individual carcinogenic risk associated with substances such as nitrogen dioxide, dust, ammonia, sodium sulfide, and benzo [a] pyrene (a total of 17 substances) is 0.999.