Ore Raw Materials Research Articles

Model studies to identify input parameters of an algorithm controlling electric supply/consumption process by underground iron ore enterprises

Purpose is the development of the research format of a mathematical model to select and assess input parameters of an algorithm controlling distribution of electric energy flows in the monitoring structure of electricity supply/consumption by using equipment of mining enterprises engaged in underground iron ore raw materials extraction. Methods. The analytical research involved a theory of random processes adapted to the real conditions. For the purpose, results of experimental measurements have been applied obtained under the conditions of active iron ore enterprises using underground procedures of the raw materials mining. Methods of random functions (i.e. elements of correlation theory) have helped identify the basic input and output parameters characterizing rather completely electric supply consumption as a stochastic process to develop a control algorithm for the process. Findings. A mathematical model of an electric supply/consumption complex as a stochastic process has been developed to assess its features as well as its levels of influence on the economic operational indices of electric power system of under-ground mining enterprises. Formation of the algorithm to control distribution of electric power flows among consumers of the analyzed types of iron ore enterprises took into consideration stochastic nature of the mentioned complex activity. Originality. The procedure of electric supply/consumption by underground iron ore enterprises has been analyzed in the format of process of a stochastic process of their operation. For the first time, the synthesized mathematical model has been built; both average and disperse stochastic characteristics of electric consumption capacity have been identified; average period of electric energy consumption as a stationary random function during the specified time has been determined; and average number of electric consumption peaks for the interval has been defined as well as average duration of their surges. Analysis of the electric supply/consumption process as a stochastic process has helped solve a problem of the peak influence on the modes of electric energy consumption by receivers of the enterprises, i.e. the random function crossing the specified electric consumption level. Practical implications. According to the available computing formats, a calculation procedure of the operation parameters of electric supply/consumption is of insufficient accuracy since average values are applied and stochastic nature of the process is ignored, which is typical for the analyzed mining enterprises. The abovementioned restricts the possibility to develop adequate system to control the electric power process in terms of the types of mining enterprises and specificity of their operational technology. The developed methods of electric supply/consumption functioning dynamics as a stochastic process help expand its use while forming and making efficient managerial decisions in the context of the analyzed process.

Техническое обслуживание и ремонт цапф барабанной мельницы плавучего комплекса горного оборудования

Introduction. In order to develop promising deposits of non-ferrous metals in the Arctic zone, in particular the Pavlovskoye lead-zinc deposit on Novaya Zemlya, it is necessary to develop climate-saving geo-technologies for mining. In this connection, a concept of conservation geo-technology has been developed and proposed through the use of a specially designed floating complex of mining equipment, included together with the quarry equipment in a single technological chain for the extraction of ore raw materials and its processing into concentrate. However, for the full functioning of the concept of this geo-technology, it is necessary to carry out preventive maintenance and repair of mining equipment at the site of its operation on a floating complex. Research methods and materials. The methodological basis of the work is a systematic approach to the studied means of carrying out repair and restoration works of mining machinery and equipment, which includes both theoretical analysis and generalization of the results of fundamental and applied works of domestic and foreign authors, including methods and theories of designing technology for repairing metalworking and mining processing complexes, multicriteria analysis and simulation modeling. Research results. The article proposes a new technology for the implementation of repair work to restore the working surfaces of hollow loading and unloading support trunnions of hydrostatic sliding bearing units of a drum mill in cramped deck conditions of a floating complex of mining equipment for the development of deposits in the Arctic zone. The structure of the built-in mechanized modular machine tool complex is developed and presented, with the help of which the hollow support trunnions of the drum mill are directly machined according to the patented repair technology. Conclusion. It is shown that the use of the described repair technology by means of an embedded mechanized modular complex will reduce the complexity of the overhaul of the trunnions without the need to perform dismantling work to disconnect the mill drum body from the hollow trunnion caps, which has a positive effect on the accuracy of processing the working surfaces of hollow trunnions.

A new method for pre-enrichment of gallium and lithium based on mode of occurrence in coal gangue from Antaibao surface mine, Shanxi Province, China

The presence of a notable concentrations of gallium (Ga) and lithium (Li) in coal gangue, an industrial solid waste, has attracted widespread attention. However, utilization of these resources remains an economic challenge. This study entailed an investigation of the potential of the pre-enrichment of Ga and Li in coal gangue so as to effectively utilize coal gangue resources. The modes of occurrence of Ga and Li in coal gangue were studied using a sequential chemical extraction procedure (SCEP), mineral phase composition, time-of-flight secondary ion mass spectrometry (TOF-SIMS), and elemental content composition. The results indicate that the main mineral components of the coal gangue are mica, quartz, pyrite, and clay. Ga and Li are mainly associated with Al-containing minerals, such as mica and clay. Further, the main noncarrier minerals are quartz and pyrite. Ga and Al exhibit a high degree of correlation, whereas Li exhibits a predominant association with Al and Ti. Ga and Li are also negatively correlated with Fe and Sr. Moreover, sorting experiments demonstrated that the separation of Ga and Li from pre-enriched coal gangue is an effective and environmentally friendly method. This allowed for the discarding of 31.25% of the waste rock, with an Fe content of 32.69%. The concentrate products can potentially be high-quality raw materials for Ga and Li refining facilities, whereas the tailing products can serve as an effective source of iron ore raw materials.

Influence on the sintering process of lime distribution between the blending storage and the mix department of SP-5 PJSC “MMK”

A research methodology is presented to determine the rational distribution of lime for the agglomeration process between the blending storage (fraction 0‒10 mm) and the mix department of the sinter plant (0‒3 mm). Together with the technological staff of the sinter plant four variants of lime distribution were tested and, accordingly, four piles with different lime content fraction 0‒10 mm were formed. The results of determining the granulometric composition and temperature of the mix under the conditions of lime dissociation along the process line for preparing the mix for sintering are presented. It has been established that when lime fraction of 0‒3 mm is supplied to the mix department, which ensures its content in the mix of 3%, it is heated to a temperature of 62 °C, i.e. to the “dew point”, which practi-cally prevents moisture condensation in the bed of the sintered mix. The analysis of the chemical composition of raw iron ore materials, mix and sinter, and its fluctuations has been carried out. It has been established that both for iron ore raw materials and mix, and as a result for sinter, the fluctuations of the chemical composition, estimated from the homogeneity coefficient, does not exceed 10%. The influence of the basicity of the sinter on the sulfur content in it has been established. It was found that when the content of lime fraction 0‒3 mm in the mix reaches 3%, the productivity of the sinter machine increases by at least 5.2% compared with the supply of all lime fraction 0‒10 mm to the blending storage. In this case, there are no problems for the blending storage in the cold season, when the remaining 1.5% of lime fraction 0‒10 mm is introduced into the concentrate consumption. Thus, it is recommended in winter conditions to sup-ply lime fraction of 0‒3 mm to the mix department in an amount that ensures its content in the mix equal to 3%, and the rest of the lime with a fraction of 0‒10 mm is fed to the blending storage.

Prospective assessment of the associated minerals complex in the Konksky and Bilozersky iron ore districts from the Middle-Dniprean mega-block of the Ukrainian shield

Purpose.To determine the material composition, formational types and justify the prospects for the development of metallic and non-metallic minerals complex accompanying ore occurrences and iron deposits in the Konksky and Belozersky iron ore regions of the Middle Dnieper megablock of the Ukrainian Shield. Methods.In the process of carrying out research tasks, traditional methods of studying the material composition of minerals were used - petrographic, mineragraphic, interpretation of X-ray diffraction, thermal, and chemical analyzes were carried out. An ore formation analysis of ore occurrences of minerals accompanying iron in the Konksky and Belozersky iron ore regions was carried out. Findings.The features of the geological structure, material composition, and the influence of secondary alterations of rocks and ores on the prospects for the ore content of associated minerals accompanying iron deposits and occurrences in the study areas are characterized. The ore formation types, the genesis of ore occurrences are substantiated, and the prospects for the integrated use of raw materials accompanying iron ore deposits in the Konksky and Belozersky regions are determined. The originality.The systematic generalization of factual material regarding geological and ore formations in the Konkskaya and Belozerskaya greenstone structures, the substantiation of the possibility for using the results for metallogenic forecasting, in particular, hidden ore and the substantiation of the possibility of integrated use of the subsoil of the study areas. Practical implementation is justified by the possibility of using research results in the process of exploration and development work for a complex of associated minerals within the research area. An assessment of the prospects for the use of minerals accompanying deposits of strategically important iron ore raw materials will make it possible to ensure the comprehensive use of the subsoil of iron ore areas.

Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine

Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine

Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine

Method to Calculate the Limiting and Optimal Conditions of the Chemical and Energy Engineering Process of Calcination of Lump and Pelletized Phosphate Ore Raw Materials on the Grate of a Traveling-Grate Roasting Machine

Опыт освоения магнитно-гравитационной сепарации на предприятиях России и стран СНГ для повышения качества железорудного сырья

The paper analyzes the tasks of producing high-quality iron ore concentrates suitable for nonblast-furnace metallurgy and the challenges of processing magnetite ores with the current technological level of dressing equipment and technologies. One of the best methods to improve the quality and the grade of iron ore raw materials is the use of magnetic gravity separation in the technological process, which allows selective separation of the liberated magnetite particles from their aggregates in processing of undersize products of fine vibrating screening. This trend is implemented in the innovative magnetite ore processing technology that uses the principle of the staged output of finished concentrate. The technology makes it possible to produce a high-quality concentrate after the first grinding stage. The magnetic gravity separation has undergone industrial validation, has proven its efficiency in practice, and has become widespread at mining and processing plants not only in Russia, but also in the CIS countries. Over 180 MGS-2.0 magnetic gravity separators produced by Russian manufacturers have already been or are being implemented at various Russian and CIS companies. Industrial separators are equipped with modern automation systems providing high technological separation performance, have no rotating parts and are simple in design. The authors continue R&D works on creation of automated control systems for the magnetic gravity separation process based on designing digital models adapted for introduction into the plant’s automated process control systems.

Study of technological properties of the sample ethiopian iron ore of the arabian-nubian shield. Part 2. Microscopic analysis of ore samples with a thickness of +40.0+5.0 mm

As a result of the research, the mineral composition of the mineralogical and petrological varieties of material of the 10-20 mm and 20-40 mm size classes of the studied ore sample was specified. Transparent and polished sections of the above-mentioned granulometric samples were prepared. Microscopic examination was carried out using a transmitted and reflected light microscope «Carl Zeiss Jena NU-2 Microscope». A description of the discovered minerals was completed. It was found that the main ore minerals of the studied ore are dispersed hematite and hydrohematite, and their amount is about 54.0% of the total volume. Microscopic analysis also revealed hydrohematite spherulites, including in the intergranular space in quartz aggregates. It is shown that secondary ore minerals in the studied raw materials are goethite and hydrogoethite. Microscopic analysis showed their content at the level of 4.0 %. The color of goethite and hydrogethite, which are represented by iron hydroxides of yellow, brown, brown and black color and their form in the form of nodular aggregates, spherulites of crusts, and nest-like aggregates, is also determined. It was found that the main non-metallic mineral in the studied raw material is quartz, the content of which is on average 30 %. This mineral in the sample of the studied ore is characterized by a variety of morphological features and a wide range of grain sizes – from several micrometers to several centimeters. Microscopic examination of quartz showed that it is represented by xenomorphic grains with a complex nature of fusions with other minerals, rounded and acute-angled grains, chalcedony (agat) grains and thin-prismatic crystals. The presence of a secondary non-ore mineral, which has clay properties and is represented by kaolinite, is also shown. An additional study was carried out, in which chalcopyrite – an additional component of iron ore raw materials – was analyzed. The conducted microscopic studies made it possible to draw a conclusion about the mineral and petrological characteristics of the raw material. It is shown that the type of iron ore of the Arabian-Nubian shield is similar to ores of volcanic-sedimentary origin and brown iron ores

Нечеткологическая модель многостадийной химико-энерготехнологической системы переработки мелкодисперсного рудного сырья

The results of the study, the purpose of which was to build a software model of a multi-stage integrated system for processing finely dispersed ore raw materials, are presented. The role of such raw materials can be processed waste at mining and processing plants of apatite-nepheline and other types of ores, which accumulate in large volumes in tailing dumps. They create a significant environmental threat in the territories adjacent to the plants due to weathering, dust formation, penetration into the soil and aquifers of chemical compounds and substances hazardous to human health. Therefore, the improvement of existing production processes, the development of new technological systems for mining and processing plants, including the application of the principles of the circular economy, waste recycling, justifies the relevance of the chosen research area. The proposed program model is based on the use of trainable trees of systems (blocks) of fuzzy inference of the first and second types. This approach made it possible to avoid unnecessary complication of the bases of fuzzy inference rules when using only one fuzzy block when building a multi-parameter model of the entire multi-stage complex system. The use of several fuzzy inference blocks that describe the behavior of individual units of the system and their configuration in accordance with the physical structure of the system allows the use of relatively simple sets of rules for individual blocks. The joint selection of their parameters when training a tree of fuzzy blocks makes it possible to achieve high accuracy of the solutions obtained. The novelty of the research results is the proposed software fuzzy model of an integrated system for processing finely dispersed ore raw materials. The results of a simulation experiment conducted in the MatLab environment using a synthetic data set generated in Simulink are presented. The results showed that the trained fuzzy model provides good fidelity of the parameters and variables from the test part of the synthetic set.

Production of metallic magnesium based on polymineral ores of the Kaliningrad-Gdansk salt basin

Purpose of the work. Rational subsurface use implies the most complete and comprehensive development of mineral reserves. In this regard, the aim of the study is to determine the possibility of obtaining metallic magnesium from the ores of the Kaliningrad-Gdansk salt basin, along with planned potassium sulfate and magnesium sulfate production. Methods. In the course of the study, ore samples were selected, the existing technologies of polymineral (kainite, carnallite and kizerite) ore processing are analyzed, a technological process for obtaining metallic magnesium from the available ore raw materials and by-products of the main production was developed, tests were organized to obtain metallic magnesium by electrolytic means based on the Nivenskoye deposit ore, the quality of the obtained material was evaluated, the possibilities of creating production in Kaliningrad region based on the available raw materials were analyzed. Results. As a result of the development of raw material processing technology and laboratory tests, the possibility of obtaining metallic magnesium from polymineral (carnallite) ores of the Kaliningrad-Gdansk salt basin has been established. At the same time, it was revealed that the production of magnesium by the electrolytic method is complicated by the presence of a high concentration of sulfate ions in the initial processed raw materials, which requires the inclusion of the desulfatization stage in the technological process. Conclusions. Natural carnallite ores of the Kaliningrad-Gdansk salt basin, as well as the obtained by-products arising during the main technological process (production of potassium sulfate), can be used for the production of high-quality metallic magnesium according to GOST 804–93 quality level. The results of the study make it possible to develop the natural resources of the polymineral ores of the Kaliningrad-Gdansk salt basin in the most comprehensive way, obtaining a wide range of products, including metallic magnesium.

A Study of the Influence of the Thermal Conductivity Coefficient of Phosphate Ore Raw Materials on the Efficiency of the Chemical–Power Technological Process of Roasting in a Dynamic Dense Multilayered Mass

A Study of the Influence of the Thermal Conductivity Coefficient of Phosphate Ore Raw Materials on the Efficiency of the Chemical–Power Technological Process of Roasting in a Dynamic Dense Multilayered Mass

The results of physical modeling of the loading of manganese ore by a trough device as an additive to iron ore raw materials of blast-furnace smelting

The results of physical modeling of the loading of manganese ore by a trough device as an additive to iron ore raw materials of blast-furnace smelting

ICJ Jurisdiction Over the Case of Policy to Stop Nickel Exports: European Union v. Indonesia

The purpose of this paper is to explore the jurisdiction of the International Court of Justice (ICJ) regarding the European Union's legal action against Indonesia in response to Indonesia's policy to halt the export of raw materials derived from nickel ore. The research methodology employed for this paper is normative legal research, relying primarily on legal materials that encompass normative law for data collection. The outcome of this study indicates that Indonesia has implemented a measure to cease the export of raw materials derived from nickel ore, leading to the domestic downstream management of mineral resources within the country. In addition, the purpose of the export stop is the strong desire of the Indonesian government so that all raw materials are managed domestically and can invite investors from abroad to invest in Indonesia. However, the European Union (EU), as one of the enthusiasts and consumers of nickel ore raw materials, objected to the policy issued by Indonesia. The form of objection from the EU is to sue Indonesia to the WTO. The EU objected to the policies issued by the Indonesian government because they could interfere with various policies taken by the EU. The policy is expected that in 2050 the EU will be free from CO2 emissions. Furthermore, the EU argues that the cost of nickel ore, once domestically managed, is anticipated to undergo a significant increase, surpassing the prevailing market price. The author scrutinizes the jurisdictional aspects regulated by the International Court of Justice (ICJ) within this context

Influence of low temperatures and the limited consumption of lime on the operation of sinter machines at the SP-5 of PJSC MMK in winter conditions

Lime is the only additive that has shown high efficiency in the sinter production due to the double effect on the sintering process: improving the granulation of the mix and its heating. At the sinter plant No. 5 of PJSC “MMK”, a rational ratio was established between the lime consumption of 0‒10 mm fraction supplied to the closed blending storage of mono-mix, and a fraction of 0‒3 mm, supplied to the charge room after its additional blending arrangement. During the previous research period (November 2022), the air temperature in blending storage did not fall below 6 °С, and the moisture of iron ore raw materials was maintained at the level of 3.5‒4.0%. It was recommended in winter conditions to supply lime with a fraction of 0‒3 mm to the mix department in the amount of 3% in relation to the concentrate, and the rest of the lime with a fraction of 0‒10 mm to the blending storage. In December of 2022 after the previous experiments the air temperature dropped to ‒25 °С. It was necessary to additionally estimate the minimum content of lime fraction 0‒10 mm in iron one concentrate in the storage, preventing its freezing. In this study, it was found that a decrease in air temperature over several days to ‒25 °С with a lime fraction of 0‒10 mm in the blending storage in relation to the concentrate of only 1.5% did not cause problems with flow ability and intake of iron ore con-centrate. In addition, after the start-up of sinter plant No. 5, the lime content in relation to the concentrate consumption was maintained about 5%, and the effect of its consumption on the productivity of sinter machines was not determined. As installed the decrease in productivity of sinter machines, as a result of a break due to frost in the supply of the rest of the lime by pneumatic transport to the mix department, was 12%. The influence of the basicity of iron ore on the degree of removal of sulfate sulfur in the sintering of charge was also clarified

Using nonlinear ultrasonic measurements to estimate parameters of the sedimentation of slurry solid phase in thickener

Purpose. Improvement of the method for estimating sedimentation process parameters of the slurry solid phase particles in thickener on the basis of measurements of the nonlinear characteristics of ultrasonic waves propagating in a controlled medium. Methodology. The following methods were used: analysis of scientific results and practical developments; methods of mathematical statistics for evaluating the results of experiments; methods of analytical synthesis; methods of numerical modeling for the synthesis and analysis of a mathematical model. Findings. It was established that the nonlinearity of the process of propagation of ultrasonic waves in ore slurry, which is determined by the number and size of crushed ore particles in it, can be estimated by determining the amplitudes of several harmonics of the measured acoustic signal. This approach allows maintaining the productivity of the desliming process in accordance with the characteristics of the ore suspension, without allowing the loss of valuable components. Obtaining real-time information about the characteristics of the particle sedimentation process in the ore suspension at the initial stage enables reducing the duration of transitional processes in the control system. Originality. The method for estimating the parameters of the deposition of the solid phase of the pulp in the thickener has been improved, which is based on the fact that the nonlinearity of the process of propagation of a controlled ultrasonic signal in the thickener; this leads to modulation of the generated ultrasonic packet and, consequently, the appearance of higher harmonics. To obtain a more accurate estimate of the nonlinearity of this process, all the values obtained must be normalized to represent only the relative changes in the acoustic nonlinear response. Practical value. A system for automatic control of the thickener operation is proposed, which uses nonlinear ultrasonic measurements to estimate the parameters of the sedimentation of the solid phase of the pulp in the thickener. According to the results of industrial tests of the system of automatic control of the thickener based on ultrasonic control devices, it was established that its use as part of the automated control system for the technological processes of beneficiation of iron ore raw materials at the ore beneficiation factory of the Northern mining works will allow reducing water consumption by 3.5 % and iron-magnetite losses by 0.6–0.7 %.

Modeling assessment of power consumption efficiency at iron ore mining enterprises

Today's world requires controlling the process of power consumption and supply. The control system should respond proactively and preventively to external disturbances. Among such disturbances for iron ore mining enterprises, the most significant are changes in the technology of operating modes of stationary power receivers, taking into account power costs. General methodological approaches to forming models that relate power consumption indices for a given volume of ore mass mined are investigated. Methods of formalizing components of the power system of iron ore mining enterprises engaged in underground mining of iron ore raw materials are under study. Methods for building a mathematical model of optimal power consumption efficiency are studied. The synthesized model makes it possible to determine the mode of operation required to mine a given amount of ore mass, while minimizing the cost of power consumption. A target function is built considering the cost of power consumed by an iron ore underground mining enterprise. Minimization of the power consumption cost is formed as a task of reducing the functional in terms of the active power consumed at a certain period of time. The proposed solution is limited to the condition that the cost of active power is time dependent, i.e. it is a piecewise-constant function. As a result, the power cost is given by a piecewise-constant function with two values. A qualitative graphical representation of the considered time dependence of the active power cost is presented. Based on visual and graphical analysis, an analytical function of the active power cost according to time of day is formed.

Textural-structural characteristics and mineral types of ores of the Aghlig-Filfilli mineralization area of the Duruja zone


 
 
 The black shale complex, which is organic carbon-bearing and characterized by syngenetic, epigenetic sulphidation and intense metamorphism in the Duruja structural-forma- tion zone of the southern slope of the Greater Caucasus, is the focus of geologists’ attention due to the mineralization areas, which are rich in significant non-ferrous, noble, radioactive metals, rare and rare earth elements. In order to determine the prospects of noble, non-ferrous, radioactive metals, rare and rare earth elements of the black shale of the Aghlig-Filfilli mineralization area of the Duruja zone, it is necessary to determine the mineralogical composition of the ores of the area, to study the textural-structural characteristics and to clarify whether the rocks of the zone are a source of complex ore raw materials. The object of the work is the mineragraphic and petrographic study of the numerous samples col- lected from the Aghlig-Filfilli mineralization area during the field expedition before the PhD admission period, during my post-graduate studies and currently in order to solve various important mineralogical and petrographic problems. In order to investigate the textural-structural characteristics and mineral types of the ores of the Aghlig-Filfilli mineralization area, thin sections and polished sections made from the samples were studied with the help of «Carl Zeiss» and «Polam-312» microscopes in transmitted and reflected rays. The composition, surface area and morphological characteristics of the monomineral samples were studied by the electron microscope «SEM». Accurate diagnosis of some minerals was carried out based on the results of their X-ray diffractometric analysis. According to the results of the research, the ores of the Aghlig-Filfilli mineralization area were formed in 3 stages: syngenetic, epigenetic and rem- ineralization as a result of strong metamorphism of syngenetic formations. At the same time, the origin of the ores of the Aghlıg-Filfilli mineralization area was studied. According to the results of the research, it was determined that epigenetic mineralization in contact with Aralig and Zangi deep faults in the north and south of the Aghlig-Filfilli area is of magmatogene origin (δ34S=1.6-4.6), and synge- netic mineralization in the black shales towards the center is of biogenic origin (δ34S= -18 – -22.6).
 
 

Интеллектуальная поддержка управления процессами обработки рудного сырья на основе прецедентного подхода и онтологических моделей

The article discusses the possibility of applying a precedent approach to improve the efficiency of control of thermophysical and chemical-energy-technological processes of processing ore raw materials. As an example, one of the variants of such processes is considered – heat treatment of pelletized phosphate raw materials. To form the knowledge base of an intelligent system, it is proposed to jointly use a compositional ontological model, which includes two ontologies, each of which is focused on describing one of the subject areas under consideration: thermophysical and chemical-energy-technological processes of heat treatment of pelletized phosphate ore processing plants. The use of this model makes it possible to take into account both the specific properties and characteristics of the processes under consideration, as well as unique tasks and management indicators, avoiding the need to form a generalized holistic ontology that would reflect these subject areas in a simplified form. The use of a compositional ontological model also makes it possible to store information not only in quantitative but also in qualitative form. To form solutions to provide support for the processes of managing the processing of ore raw materials, it is proposed to use a new modified case-based approach, which consists in the possibility of working with the proposed compositional ontological model in determining the closest solution to the current situation, as well as the formation of quantitative values of these decisions based on the information presented in linguistic form. It is possible to take into account the degree of significance of each of the ontologies when developing solutions for each individual current situation that arises when managing the processing of ore raw materials.

УПРАВЛЕНИЕ ПРОЦЕССОМ ЭЛЕКТРОПЛАВКИ В ДУГОВОЙ ПЕЧИ И В АГРЕГАТЕ КОВШ-ПЕЧЬ (АКП) С НЕПРЕРЫВНОЙ ПОДАЧЕЙ ЖЕЛЕЗОРУДНОГО МЕТАЛЛИЗОВАННОГО СЫРЬЯ (ЖМС) В СВАРОЧНУЮ ЗОНУ

The paper presents energy and technological indicators and designs of improved electric furnace units for melting steel from iron ore raw materials (IOR). A method of controlling an arc furnace with a continuous IOR supply is proposed, which gives the opportunity to control and regulate the active power of the furnace, thermal processes in the welding bath of the electric arc, as well as in the unit as a whole. The design of a ladle unit for out-of-furnace melt treatment is presented, which allows the melting of high-quality electrical steel and simultaneous treatment with inert gases. At the same time, it is possible to reduce the metal carbon monoxide and IOR melting time.