Complex Technological Processes Research Articles

Integrated Identification and Efficient Use of Biodiversity in Mountainous Regions

The article studies the comprehensive identification and efficient use of biodiversity (geothermal sources) in mountainous regions. Discussion of the ways to solve the most acute problems affecting mountainous regions with complex relief has always been on the agenda as a topical issue. The purpose of the presented work is to determine the quantitative, qualitative and thermodynamic parameters of geothermal sources in these territories, as well as the spatial structure of the foci of formation of their migration routes. Conducting a comprehensive assessment of the biodiversity of deforested mountainous regions substantiates the need to ensure the protection of these unique ecosystems. The issue of determining the direction of the integrated use of geothermal resources is studied not only by its structure and characteristics, but also by the level of development of complex technological processes for the extraction and processing of hydromineral raw materials and the technology of thermal energy processes. Using a number of analytical research methods (hydrogeological, geochemical, geophysical, isotope, computer (mathematical) modeling and others) to solve these problems, we determine the foci of formation of reservoir conditions in individual horizons, migration routes, as well as quantitative and qualitative parameters of thermal waters. The following issues were studied: hydrogeological research methods will help to identify the development zone of the intensive circulation aquifer (active water exchange) and the base of the development zone of the deep underground flow aquifer (impeded exchange) in the underground hydrosphere zones, and to assess their hydrodynamic and hydrothermal conditions and parameters. Based on the data from drilled exploratory oil wells, the conditions for the formation of thermal water layers in various hydrogeological structures will be determined; hydrochemical research methods will be aimed at assessing the macro- and microcomponent composition and radiation background of thermal waters at various intervals of migration routes by determining various indicators at different depths of their formation (based on the petrochemical structure of the geological part); isotopic studies of the gas composition of thermal waters will help to identify their genesis and use them as a marker when determining the points of formation; computer modeling of the underground hydrosphere of a representative object was carried out using mathematical programs.

DIGITALIZATION: A TOOL FOR MODERNIZATION OF PUBLIC ADMINISTRATION IN UKRAINE

The article conducts a theoretical and methodological analysis of digitalization as a crucial factor in the development of a digital society and democratic governance in Ukraine. Digitalization is characterized as a tool for modernizing and introducing a new model of public administration based on cooperation with the population, protection of public interests, advocacy for citizens' interests, and public-private partnerships with commercial business structures. It is determined that the digitalization of public administration can be understood as a concept for developing public administration through the automation of decision-making processes and the provision of e-services; as a process of transitioning to digital public administration through the use of digital technologies; and as a tool for transforming the system of public administration at all levels of government-state, regional, and municipal – with the aim of strengthening communication between authorities and the public. It is noted that digitalization has changed the approach to public administration, directing it towards the provision of e-services and the exchange of benefits through the adoption of modern digital technologies. It is substantiated that the digitalization of public administration is a complex technological process: the creation of entirely new developments based on the introduction of IT solutions, digital platforms, and innovations contributes to increasing the productivity of managerial labor, enhancing communication between government entities, business structures, and the population. It is emphasized that the digitalization of public administration has made it possible to combine efforts in achieving the global goal of sustainable development of the state. Sustainable development is a voluntary initiative of individuals, the state, and the world as a whole, while increasing the openness of public administration allows all stakeholders to access necessary information, thereby reducing the possibility of falsification.

ON THE ISSUE OF AUTOMATION OF THE SECTION OF MECHANICAL PROCESSING OF POLYSTYRENE PARTS

The paper proposes a consolidated model of the analysis of industrial production in order to assess the possibility and expediency of automation of the existing production process. The main parameters of the processing objects, which affect the decision-making regarding the automation of the process of its manufacture, are revealed. Based on the analysis of the configuration, geometric parameters, features of the location of the complex profile surfaces of polystyrene parts, as well as the analysis of their manufacturability, a conclusion was made about the possibility and expediency of automating the area of mechanical processing of such parts. Special attention was paid to the analysis of existing technological processes of processing typical parts. As a result of the analysis, a set of requirements for the structure and parameters of the new automated technological system was formed, as well as a new technological process for processing a set of parts was proposed. On the basis of the formulated requirements, the software type and machine level of automation of the technological system were chosen, the basic element of which was the manipulator robot. For the selected type of technological system, a new complex technological process of processing a set of parts has been developed, which involves minor changes in the design of some parts, which does not affect their functional purpose. For the implementation of the proposed technological process and the formed requirements for the equipment, specific main elements of the system were chosen - a robot-manipulator and a power unit, as well as a cutting tool, which allows processing of almost all parts of the set without replacement during the work. This made it possible to offer an option of an automated workplace, equipped with two working rotary tables for setting workpieces. The proposed version of the automated technological system and its implementation made it possible to significantly reduce the auxiliary time of mechanical operations, release highly qualified workers and reduce the cost of manufacturing parts.

GENERAL PRINCIPLES OF FORMALIZATION OF TECHNOLOGICAL PROCESS CONTROL OF MINING PRODUCTION IN A DYNAMIC DISTRIBUTED SYSTEM

Context. The problem of synthesis, modeling, and analysis of automated control of complex technological processes of mining production as a dynamic structure with distributed parameters. Objective. On the example of the technological line of ore beneficiation, the general principles of formalization of control of mining production processes as a dynamic system with distributed parameters are considered. Method. The modeling of interactions between individual components of the control system is carried out using the methods of coordinated distributed control. In accordance with this approach, the technological line is decomposed into a set of separate subsystems (technological units, enrichment cycles). Under these circumstances, the solution to the global optimization problem is also decomposed into a corresponding set of individual subproblems of optimizing the control of subsystems. To solve the global problem, this formulation uses a two-level structure with coordinating variables that are fed to the input of local control systems for technological units and cycles. At the lower level of control, sets of subtasks have independent solutions, coordinated by the coordinating variables formed at the upper level. Results. The paper proposes a method for forming control of a distributed system of technological units of an ore dressing line based on the decomposition of the dynamics of the distributed system into time and space components. In the spatial domain, the control synthesis problem is solved as a sequence of approximation problems of a set of spatial components of the dynamics of the controlled system. In the time domain, the solution of the control synthesis problem is based on the methods of synthesizing control systems with concentrated parameters. Conclusions. The use of the proposed approach to the formation of technological process management at mining enterprises of the Kryvyi Rih iron ore basin will improve the quality of iron ore concentrate supplied to metallurgical processing, increase the productivity of technological units and reduce energy consumption.

АВТОМАТИЧЕСКИЕ СИСТЕМЫ УПРАВЛЕНИЯ ТЕХНОЛОГИЧЕСКИМИ ПРОЦЕССАМИ ПЕРЕВОЗОК С РАСШИРЕННЫМ КОНТУРОМ АНАЛИТИКИ ДАННЫХ

A new hybrid approach has been proposed to automate the management of complex technological processes at railway stations of industrial transport using intelligent monitoring technologies. This approach is based on the concept of predictive modeling combined with methods of statistical analysis, including a modification of the principal components analysis method for multivariate statistical analysis and the identification of violations in technological processes using a combination of well-known methods such as contribution analysis and fuzzy dynamic analysis. The principal feature of the hybrid approach is mapping the initial space of numerical parameters of the technological process onto a new space formed by fuzzy rules of an evolving system model. Applying multivariate analysis to new system variables using the principal component method allows for the formation of a few intermediate variables with different degrees of granularity and interpretability, describing the behavior of the controlled process, which makes it possible to develop mathematical models and algorithms for solving various monitoring tasks An example of using this approach for post-processing monitoring data to identify performance discrepancies in a marshalling yard and anomalies in the controlled process is considered.

Leveraging multi-level correlations for imputing monitoring data in water supply systems using graph signal sampling theory

Data missing and anomalies in monitoring equipment have become critical barriers to developing intelligent Water Supply Systems (WSS). The valid data preceding and after the missing segments can be utilized to impute missing values. However, traditional imputation methods, such as linear interpolation and prediction-based methods, have limited capacity to use data relationships or can only utilize information before the missing values. Therefore, existing methods still need to work on efficiently and conveniently achieving high-accuracy imputation. According to the continuity and periodicity of WSS data, missing values often exhibit multi-level correlations with valid data. This paper innovatively employs graph structures to analyze the multi-level correlations at different timestamps and applies graph signal sampling algorithms to extract low-frequency features for imputation. A novel Graph-based Data Imputation (GDI) method has been developed, which leverages multi-level correlations to propagate information and completes imputation tasks without requiring complex feature engineering and pre-training processes. Results indicate that GDI outperforms Holt-Winters, Support Vector Regression, and Gated Recurrent Unit in the task of imputing continuous missing data. It can still achieve R2>0.8 even when the proportion of missing values reaches 80 %. These results demonstrate that GDI ensures a more streamlined and efficient imputation with high robustness and accuracy.

Building hydrophobic substrate pocket to boost activity of laccase-like nanozyme through acetonitrile-mediated strategy

Nanozymes, as promising alternatives to natural enzymes, offer several advantages with biocatalytic functions but remain inferior in catalytic activity. It is crucial to focus on factors that affect the enzymatic activity of nanozymes and develop strategies to make them more competitive with natural enzymes. Herein, CuV2O5 nanorods are confirmed to own the intrinsic laccase-like activity, and an acetonitrile (MeCN)-mediated strategy is proposed for reaction acceleration by mimicking the enzymatic substrate pocket. In the presence of MeCN, the interaction between substrates and nanozymes gets efficiently promoted by the bridging function of cyano-group, where the utilization of Cu active sites is greatly improved due to the condensed hydrophobic substrate layers formed in the vicinity of CuV2O5 nanorods by the solvent effect of MeCN. Theoretical calculations also disclose that the addition of MeCN endows 2,4-dichlorophenol (2,4-DP) with a lower free-energy barrier in adsorption and activation on the surface of CuV2O5 nanozyme. Benefiting from the improved activity, a sensitive colorimetric sensing platform for 2,4-DP is constructed with the limit of detection as low as 0.48 μM. Our finding lays a theoretical foundation for achieving high-performance catalytical activity of the nanozymes based on the modulation of the reaction microenvironment, effectively alleviating the complex engineering process of nanozymes.

RETROSPECTIVE ANALYSIS OF DESIGNING ANTI-CORRUPTION ACTS AT DIFFERENT LEVELS OF INTERNATIONAL LEGAL ANTI-CORRUPTION

It has been established that international legal countermeasures against corruption are carried out at three levels: global (by the United Nations, the Organization for Economic Cooperation and Development, the World Bank, etc.); regional integration (Council of Europe, European Union, other integration associations); bilateral intergovernmental and interagency cooperation. There is no coordination of directions and means of combating corruption between them. Therefore, international anti-corruption activities at all three levels developed not only in different directions, but also in many ways spontaneously. It has been proven that the wide participation of international organizations in the fight against corruption and the variety of anti-corruption legal means used by them contribute to the concentration and coordination of the efforts of states in the fight against corruption. Another positive effect of the acts of international organizations is also noted: drawing the attention of civil society to the tasks of combating corruption, they significantly strengthen the potential for their full solution. On the other hand, the variety of subjects and legal forms of international legal anti-corruption often create legal conflicts between acts operating in this area. Such collisions create, for example, different approaches to defining the concept of corruption. It is noted that the concepts of designing anti-corruption acts, based on the ideas and methods of system design of complex technological processes and objects, are more and more widely used in the law-making practice of international organizations and states of the modern world. Their influence on the legal regulation of social relations is increasing, confirming that at the current stage of socio-economic, technological, informational development, the complication of social relations, the rapid increase in their quantitative parameters and indicators, the growing danger of man-made and natural disasters, the introduction of system design becomes impossible. It is gradually displacing the maximally ineffective under such conditions practices of «industry», «fragmentary», «point», «situational» legal regulation. It has been established that the systematic design of anti-corruption acts primarily involves conducting comprehensive studies of law-making initiatives. In the course of such studies, all factors that may affect the intended sphere (object) of legal regulation must be analyzed; the opinions, positions, and evaluations of not only regulatory and control-supervisory state bodies, but also potential participants in the projected legal relations should be taken into account.

ШЛИФОВАНИЕ ПОВЕРХНОСТИ ВОССТАНОВЛЕННЫХ ПОРОШКОВЫМИ ТРУДНООБРАБАТЫВАЕМЫМИ МАТЕРИАЛАМИ

The article discusses the use of impregnated abrasive wheels for grinding the surface of recovered hard-to-process powder materials. The paper investigates the formation of a rough surface during internal grinding of cylinders of marine engines after restoration to their original dimensions, with powder materials of grades PG-CP2, PG-10H-0.2 containing nickel, chromium, iron and other hard-to-work metals, which during the restoration process create a special protective metal layer on the surface of the cylinders, the processing of which is very difficult It's difficult. Therefore, the grinding of the internal surfaces of the restored cylinders of marine engines is a complex technological process that proceeds in strict compliance with all technological operations, in stages. According to the results of the study, the influence of the rotation speed of the workpiece on the roughness of the inner surface of the sleeve, accompanied by grinding with impregnated grinding wheels, was revealed. It has been experimentally confirmed that when treated with impregnated abrasive wheels, the roughness of the polished surface decreases by about 1.5-1.8 times.

Formation of A Culture of Occupational Safety at Oil and Gas Industry Enterprises

One of the most important aspects of labor activity and productivity is ensuring safety and comfort at the workplace. The main purpose of the study is to analyze the obtained data on reducing the number of occupational injuries and to identify the main factors of improving work culture at the enterprises of the oil and gas industry. The authors of the work noted the importance of preventive measures aimed at reducing the rate of occupational injuries and accidents to ensure safety and improve the culture of labor protection. In the oil and gas industry, characterized by a high level of danger and complex technological processes, labor safety is especially important, so the authors analyzed the statistical data of occupational injuries in the period from 2015 to 2022 in «KazTransOil» JSC. As a result of the study, the key factors for improving the culture of labor safety were identified. Due to the comprehensive improvement of safety culture and transition from «dependent» to «independent» level in the company's strategy is supposed to use leadership tools and involvement of management, employees. These measures taken have contributed to a 66% reduction in occupational injuries in 2021 as compared to 2020 and also resulted in zero injuries in 2022. By analyzing the Bradley Curve reduction in the number of injuries and identifying factors that contribute to an improved safety culture, a safer work environment can be created and the company's performance can be improved.

Фосфорды тазалау процесін тиімді бақылау үшін интеллектуалды алгоритмдердің жасалуы және зерттелуі

In a market economy, there is a critical need to introduce optimal control systems for technological processes in industries like non-ferrous and ferrous metallurgy, the chemical industry, and petrochemicals. These systems can help use mineral resources more efficiently, save energy, reduce environmental impact, and increase production efficiency. The active development and implementation of such optimal control systems began in the 1960s-1980s, but significant automated systems have not yet been widely adopted. This is due to the extreme complexity of the physical and chemical phenomena in modern industrial processes, which makes it difficult to create adequate mathematical models. Recently, there has been a trend toward using modern intelligent technologies that can leverage the knowledge, experience, and intuition of experts. The use of artificial intelligence methods in designing optimal control systems has significantly simplified their development, improved control models, and increased efficiency. Therefore, the urgent task is to develop and implement intelligent control models (algorithms) for various technological processes, including those in the phosphorus industry. The text proposes using new intelligent algorithms to control a complex technological process - the purification of phosphorus from arsenic and organics at the Novodzhambyl Phosphorus Plant (NDPP).

Possibilities of Using Phaseolus Vulgaris and Phaseolus Lunatus Beans in Pasta Production

In last decade, in scientific literature, various pulses dominate as raw material of new pasta development. The production of pulse pasta is complex technological process, generally based on extrusion technology. The aim of the study was to produce spaghetti-type pasta from Phaseolus vulgaris (variety unknown) and Phaseolus lunatus (variety Kontra). The recipes made with xanthan gum and corn starch as a binder, the optimal cooking time and water absorption capacity was determined. In the experiment, wheat semolina spaghetti was used as a control sample. Four types of spaghetti were prepared using a single-screw extruder, then dried in a rotary oven and stored until analysis. Pasta cooking properties have been determined. The obtained data were compared using t-test. There were significant differences between obtained spaghetti and control sample. The results confirm that beans can be used in pasta production.

VIBRATORY DRYERS AS AN EFFECTIVE TOOL FOR REDUCING ENERGY CONSUMPTION IN PRODUCTION

Drying of materials is a complex technological process used in various industries and often is one of the main stages of production. This process, in particular for bulk materials, depends on humidity, particle size, hydrodynamic conditions of the particles flowing through the drying agent and environmental parameters. Grain dryers expose grain to more stringent conditions than natural drying, which can potentially lead to a deterioration in grain quality. The combination of these factors determines the nature of the entire process. In agricultural production, the drying stage is one of the most important for grain preservation. Currently, the convective drying method is widely used for this process. However, along with its advantages, this method also has a number of significant disadvantages, one of the most significant of which is its high energy consumption. In this regard, scientific research is being intensively conducted to develop ways and methods to reduce the energy intensity of the convective drying method. The effects of vibration on raw materials are being rapidly introduced in various industries. The use of vibration technologies during drying intensifies the process of processing grain raw materials due to the rapid renewal of its surface in contact with the drying agent. Fast and efficient drying with vibration technology reduces moisture content and the risk of the appearance of bacteria and mold in the grain. The construction of the dryer using vibration technology helps to avoid overheating of the grain, providing optimal temperature conditions, which contributes to the preservation of nutrients and other useful properties of bulk agricultural materials.

DEVELOPMENT OF A SETUP FOR VIBRATORY ABRASIVE TREATMENT OF SURFACES OF DECORATIVE ELEMENTS WITH AN ACTIVE WORKING TOOL

This work provides an overview of equipment and technologies for decorative-finishing treatment of parts. It is established that the most effective methods are abrasive mechanical processing techniques such as tumbling, vibrational, centric-rotational, and centric-planetary. Each of them exhibits varying levels of efficiency in specific application areas. Currently, these methods ensure the highest processing efficiency and quality while maintaining the lowest product cost and manufacturing complexity. Technological equipment is currently produced in series, which may include relatively complex assemblies and mechanisms to address complex technological process tasks, each having specific drawbacks. The main directions for improving equipment are identified, and a classifier of part characteristics for vibro-processing is provided to standardize and unify. Structural schemes for setups for vibratory abrasive processing with actively positioned horizontal and vertical working tools are proposed. The uniqueness of these setups lies in the ability to create vibrational fields of different intensities (controlled vibratory exciter of the working chamber) and to control the intensity of the motion of the working tool. Control over these parameters allows adapting the setup to a specific technological process and achieving optimal technical and economic indicators for vibro-processing parts, especially for decorative elements with complex shapes, small dimensions, diverse material characteristics – varying hardness and viscosity, which may pose challenges with conventional methods.

Analysis of the State of Moisture Control to Ensure and Regulate the Quality of Grain and Grain Products

The article discusses the methods for determining the maturity of grain and describes its behavior during harvesting, to optimize the selection of the grain moisture state, discusses the requirements for the choice of measurement method and the design of moisture control measuring devices, as well as its high accuracy and the possibility of measuring from field conditions, collection, storage, transportation, and industrial processing and release of finished products of granular materials. The purpose of the study is to improve the efficiency of control and management of complex technological processes and moisture control devices for granular bulk materials of plant origin through the development of systems for automatic and automated control of the electrophysical characteristics of grain products and to increase the reliability of quantitative and qualitative assessments of production and technological measurement information. To achieve this goal, it is necessary to conduct analytical and experimental studies of the possibility of creating an express method for controlling the moisture content of grain and products of their industrial processing and the development of a moisture meter for automated control of raw material parameters during acceptance and storage at grain processing enterprises. The article discusses the scientific and methodological foundations for measuring the electrophysical characteristics of grain products of agricultural production and the implementation on this basis of the functional subsystem of information support by the Automated Process Control System for Controlling the Mass Ratio of Moisture of Plant Origin Materials. A critical analysis of the current state of the theory and practice of automatic control of electrophysical characteristics of grain products and the identification of the trend of their further development and improvement are carried out. A mathematical model of the interaction of a high-frequency field with a granular material has been constructed, where the influence of the elastic properties of the grain on the electrical characteristics of the electromagnetic wave, which distinguishes its behavior in the field of a high-frequency wave from many other dielectrics, has been substantiated, and the influence of a large number of various disturbing factors has been studied, often the measurement results cannot be applied in the control of the technological process due to the uneliminated error, which is the cause of inaccurate information. Primary measuring transducers of electrophysical parameters of grain products are proposed, and their mathematical models are considered. A functional scheme of the measuring device based on the dielcometric method of moisture control of grain and granular materials has been developed, and metrological characteristics have been given.

Complexity biomechanics: a case study of dragonfly wing design from constituting composite material to higher structural levels.

Presenting a novel framework for sustainable and regenerative design and development is a fundamental future need. Here we argue that a new framework, referred to as complexity biomechanics, which can be used for holistic analysis and understanding of natural mechanical systems, is key to fulfilling this need. We also present a roadmap for the design and development of intelligent and complex engineering materials, mechanisms, structures, systems, and processes capable of automatic adaptation and self-organization in response to ever-changing environments. We apply complexity biomechanics to elucidate how the different structural components of a complex biological system as dragonfly wings, from ultrastructure of the cuticle, the constituting bio-composite material of the wing, to higher structural levels, collaboratively contribute to the functionality of the entire wing system. This framework not only proposes a paradigm shift in understanding and drawing inspiration from natural systems but also holds potential applications in various domains, including materials science and engineering, biomechanics, biomimetics, bionics, and engineering biology.

Processing of a Part Such as a Composite Bearing Housing on a Milling Machine With a Digital Control Program

In the era of the industrial revolution of ndustry 4.0, the Republic of Kazakhstan is rapidly introducing automated robots and digital control programs in many of its production facilities. In this context, special attention is paid to modern technologies, and AKIRA SEIKI milling machines with FANUC control software stand out as advanced technologies in this process. They are becoming the most popular in the CIS countries due to the economic efficiency and intellectual support of the Taiwanese manufacturer. Practical aspects of constructing CNC milling machines and their practical use are presented in this article. Particular attention is paid to the functionality of milling machines using the example of processing such a part as a composite bearing housing. In addition, the process of writing processing operation codes in the CIMKO computer program is described. The code is provided with brief descriptions to help you understand the compiled workpiece processing operations. With the growing need for efficiency and precision in production, many companies and industrial plants in the Republic of Kazakhstan are considering AKIRA SEIKI milling machines with FANUC control software as a major investment. These machines not only provide high productivity, but also help automate complex technological processes. CIMKO, among other things, allows the development and optimization of machining code, which complements the efficiency and accuracy of the machines.

Study on Preparation Technology and Heat Conduction Mechanism of High-Purity & Ultra-Fine Alumina Powder from Scrap Aluminum Cans

In view of the increasing scarcity of bauxite resources in China, the high energy consumption and high pollution of electrolytic aluminum, and the requirements for energy conservation and environmental protection, aluminum recycling and high-value utilization of its derivatives have evolved into a crucial development requirement for the aluminum industry in the future. As an important part of the development of recycled aluminum resources, the high-value application of scrap aluminum cans has always been a hot research topic in various recycled aluminum processing enterprises and scientific research units. The traditional regeneration system of waste cans includes a series of complex technological processes such as pretreatment, paint removal, smelting system and casting system, which is difficult to control in the middle of the process. Most of the recycled scrap aluminum cans are cast and downgraded for later use, except for a part of them used as alloy materials for new cans. In this paper, combined with the research on the preparation of metal aluminum alkoxide, combined with recrystallization heat conduction to further study the effective dissolution or adsorption how to remove impurity elements to obtain high-purity aluminum alcohol salt mechanism research, and thermal effect of alcohols with different carbon chains on the synthesis of high-purity aluminum alkoxide was further investigated. Moreover, the changes in morphology and pore size distribution of hydrolyzed alumina precursor materials under different hydrothermal temperature conditions were discussed by means of the alkoxide hydrolysis-sol-gel process. Eventually, the aluminum alkoxide was obtained by the reaction of waste cans with isopropanol and heavy crystal thermal conductivity, and the high-purity aluminum alkoxide was purified by vacuum distillation. Under the hydrothermal condition of 160°C, the high-purity alumina material with a purity of 99.99% and an original crystal size of 200nm was prepared.

Laboratory evaluation of a complex treatment technology for reducing water absorption of the pavement subbase aggregate from the blast-furnace slag

When smelting each ton of pig iron, approximately 500 kg of blast-furnace slag is formed and requires recycling. Air-cooled blast-furnace slag can be used for the manufacture of slag aggregate for the pavement subbase layers, as an alternative to natural stone aggregate. The wide use of slag in this area is limited by its high water absorption. This paper proposes a complex technology to reduce water absorption of slag aggregate. This technology includes selective crushing, which allows separating low-porosity aggregate grains from high-porosity ones, and impregnation of selected low-porosity grains with hydrophobic agent (surface hydrophobization). The results of a laboratory evaluation of this technology effectiveness are presented. Article also contains optimal parameters of this complex technological process which allowed to reduce the water absorption of the slag aggregate from 4.54% to 1.05%.

Increasing in technology of turbine channels by combined method

In this paper, we will talk about complex technological processes that combine the combined finishing and hardening treatment of the surfaces of the interblade channel of solid cast turbines with a second-order curvature and a twist along the radius. This method allows to improve manufacturability and achieve the desired design parameters.