Combined activation technologies mineral raw materials

Relevance. The efficiency of using the products of subsoil exploitation is a factor in strengthening the mineral resource base of the mining industry. The success of improving ore preparation technologies is associated with the activation of mineral raw materials in mills, including impact mills – disintegrators. A fundamentally new approach to ore processing technology includes a combination of grinding methods in mills and other activators. The issues of increasing the activity of substances on the basis of combination form an urgent scientific and industrial problem. The aim of the study of the phenomenon of combined activation is to search for the possibility of increasing the level of activation, to ensure the stability of the acquired activity and to establish patterns of relationships between the activation processes and the technological processes of using mineral raw materials. Objects: products of the development of deposits of solid mineral raw materials in various mining sectors of the national economy. Methods: Laboratory, semi-industrial and industrial experiment using improved equipment for the activation of mineral raw materials. Results. The concepts of “mechanical activation” in mills and “activation with large mechanical energy” in a disintegrator are detailed. An assessment is given to the directions of improving the mills. The results of mechanochemical activation of powders oxides in a planetary centrifugal mill “Aktivator-2s” are given. The practice of activating mineral raw materials with a combination of activators of various types is described. It has been established that the efficiency of combining mills depends on the initial size of the crushed material and equipment options are recommended depending on this. It is shown that the combination of drum and vibration mills reduced the energy consumption of the product. The results of the combination and the vibrating mill in the technological chain of the concrete complex are presented. The algorithm for the combined activation of mineral raw materials is illustrated by the example of the technology applied at the mine, which includes grinding, mixing binders, inert aggregates and grout, as well as transporting the concrete mixture to the place of use. As a quantitative indicator of activation, an equivalent of activity or a proportional ratio of the combined components is proposed. The efficiency of using solid mineral raw materials increases when it is prepared in activators.

Replacement of traditional components of the backfill mixture with man-made waste

The formation and storage of man-made waste of water-soluble ores creates a global environmental problem that entails changing landscapes in mining areas and environmental degradation. The involvement of man-made waste in a closed cycle of the production and technological chain makes it possible to reduce the impact of mining and processing on the environment. The use of non-waste (low-waste) technologies, in addition to reducing the environmental burden, allows you to expand the raw material base of the enterprise by replacing the traditional components of the backfill mixture with man-made waste from mining and processing enterprises. The possibility of replacing the traditional, specially extracted aggregate in the backfill mixture with industrial waste of water-soluble ores is experimentally proved. The possibility of creating a cementless backfill mixture is proved. The possibility of replacing the cement binder with magnesium-containing slags of the Chusovsky Metallurgical Plant was confirmed. It was found that the separate activation treatment of the components of the backfill mixture has a positive effect on its rheological properties and increases the strength of the joint mass. The use of lignosulfonate improves the quality of the mixture and the resulting mass. The development of a backfill composite from man-made waste makes it possible to implement the principle of organizing mining production, which provides for the use of intermediate products in cyclic production and excludes the formation of man-made waste of water-soluble ores.

Extended methodology for deriving formal concepts

Two methodologies for formal concepts derivation are considered: the classical one, which focuses on the posterior analysis of the object’s properties of the studied knowledge domain, and non-classical, the cornerstone of which is the a priori formation of the set of measured object’s properties and the determination of existential relations on this set. In the article, firstly, a position is fixed in the technological chain of the target transformation of the source data, where the difference between considered methodologies shows itself. Secondly, the commonality of these two approaches is established in the aspect of the unity of their hypothetical-deductive basis. In this case, the cognitive activity of the subject is expressed first in a priori and then in a posteriori conceptual scaling of the measured properties. The work demonstrates the need for the joint use of the considered methodologies at processing incomplete and inconsistent empirical data about studied knowledge domain. The intermediate consolidation of these methodologies is possible only on the basis of multi-valued logic.

Prospects for the application of the product life cycle system by means of the planned preventive maintenance module on the example of aviation and agricultural components

The paper describes an approach to the development of a functional software module within the subsystem of planning, rationing, preventive, routine maintenance, with the functions of accounting for the time of turning operations in the manufacture of machine parts for various purposes, in the general technological chain of the software complex of interacting ERP/MRP/CAD/CAM/CAE technologies of the enterprise, including forecasting both the time of resource operation and the production of necessary components, in order to support manufactured aviation, agricultural and other products throughout the life cycle.

Localization of enterprises for primary processing of milk in Almaty region

The purpose-on the basis of the analysis of the current state and location of enterprises in the dairy industry of the republic and Almaty region, in particular, to identify the main factors that hinder its development, to develop recommendations for solving the existing problems. Methods - monographic, computational-constructive, analytical, economic-statistical, logical generalization. Results - research confirms the underdevelopment of the infrastructure for effective promotion of dairy products from producer to consumer along the production-processing-sale technological chain, especially primary milk processing; often there is a discrepancy between the required proportions between the existing production capacities of milk processing enterprises and the level of development of their raw material zones. Based on production potential of each district of a specific region and calculation of the population's demand for dairy products, a forecast for creation of agricultural cooperatives (APC) of dairy direction for purification of milk from mechanical impurities, cooling, storage and transportation in the context of districtsis presented. It is necessary to create 77 APC for the period 2021-2022, incl. 64 cooperatives for primary milk processing. Conclusions - it is recommended to merge small farms into agricultural cooperatives. The economic efficiency of organizing a cooperative milk collection point at the district level has been justified. Based on the study of the existing schemes for location of milk processing enterprises, proposals have been developed for the localization of new cooperative milk collection points in the territorial units of the region. Dairy industry enterprises need investments to renew their fixed assets. The authors note that the possibilities and advantages of cooperative principles and the potential reserve of agricultural cooperation are not yet fully realized.

Features of ultrafiltration of milk obtained from cows with CSN3 polymorphism

Мембранные процессы широко внедрены на современных предприятиях молочной промышленности, поскольку они способствуют обеспечению максимальной степени использования сырья и повышению качества готовой продукции. При этом они без затруднений интегрируются в классическую технологическую цепочку. Научные изыскания, направленные на дальнейшее совершенствование технологий баромембранного концентрирования молочного сырья, а также использование генетического подхода к формированию его технологических свойств весьма актуальны. Целью данной работы являлось исследование закономерностей процесса ультрафильтрации обезжиренного молока, полученного из молока коров с генотипами АА и ВВ по гену CSN3. Объектом исследований служило обезжиренное молоко, полученное из молока от КРС черно-пестрой породы с гомозиготными генотипами по гену CSN3 (АА и ВВ). Концентрирование молока осуществляли на пилотной установке с полиэфирсульфоновыми мембранами с порогом задержки по молекулярной массе 50 кДа при температуре 15…20 °С и объемном факторе концентрирования 3,5. В результате исследований выявлена закономерность снижения скорости процесса ультрафильтрации вследствие большей эффективности концентрирования массовых долей белка и сухих веществ обезжиренного молока, полученного из молока коров с генотипом АА по гену CSN3, по отношению к молоку от коров с генотипом ВВ. Membrane processes are widely used in modern dairy production, as they help to maximize the use of raw materials and improve the quality of end product. At the same time, they are easily integrated into the classical technological chain. Further improvement of the baromembrane concentration of dairy raw products technologies and the use of the genetic approach to the formation of its technological properties is an urgent scientific study today. The aim of this work was to study the regularities of the ultrafiltration process of skim milk obtained from the milk of cows with genotypes AA and BB according to the CSN3 gene. The object of research was skim milk obtained from milk from black-and-white cattle with homozygous genotypes for the CSN3 gene (AA and BB). Milk concentration was carried out on a pilot plant with polyethersulfone membranes with a retention threshold in molecular weight of 50 kDa at a temperature of 15…20 °C and a volumetric concentration factor of 3.5. As a result of the research, a regularity of the decrease in the rate of the ultrafiltration process was revealed due to the greater efficiency of concentration of mass fractions of protein and dry matter of skim milk obtained from milk of cows with the AA genotype according to the CSN3 gene in relation to milk from cows with the BB genotype.

Organization and economic mechanism of the textile cluster development in the Republic of Kazakhstan

The purpose of the article is to study the organizational and economic mechanism of the textile cluster development in the Republic of Kazakhstan. The article discusses development of the Kazakhstani textile cluster. The textile industry is one of the priority sectors of the industry of the Republic of Kazakhstan, designated to ensure a qualitative transformation of the country’s economy. In order to develop the industry in Kazakhstan, back in 2005 a cotton-textile cluster which unites about 50% of Kazakhstan’s textile production was organized. To support the development of textile and light industry, special programmes have been developed in Kazakhstan to support the sector and, in particular, the textile cluster. Based on analysis of problems impeding its effective functioning, authors of the article substantiated the need to introduce a new organizational and economic mechanism for cluster management. The main problem of low efficiency and slow development of the cluster consisting in weak intersectoral interaction within the cluster and in the textile industry of Kazakhstan as a whole was identified. The model of cluster’s operation, organized on the “top-down” principle of mainly by the initiative of the government, was analyzed and a new organizational and economic mechanism of cluster functioning was developed based on increased interest of cluster’s entities in joint results. This mechanism is based on the consolidation of the efforts of state and non-state actors of the cluster which will ensure the greatest effectiveness of its functioning and create a synergistic effect. The purpose of the proposed mechanism is to activate the cluster’s operations, strengthen the intra-industry and cross-industry interaction of subjects and create a single technological chain within the textile industry.

PECULARITIES OF PEDAGOGICAL TECHNOLOGY OF PROFESSIONAL SELF-DETERMINATION OF THE CHOREOGRAPHER’S PERSONALITY DURING PROFESSIONAL TRAINING

The article considers the features of pedagogical technology of professional self-determination of the choreographer’s personality during professional training. This paper states that one of the means of developing the pedagogical qualities of the student's personality in the professional training of a choreographer is the author’s pedagogical technology. We determine the relevance of the study of the pedagogical technology of professional self-determination of the choreographer during professional training by the influence of many objective and subjective factors and reveals a direct relationship between the specific historical situation in the country and the cultural needs of the population. That is why there is a need for scientific understanding of the above processes – their specifics, mechanisms, forms, methods, techniques, i.e. the entire technological chain. The article also states that no matter how perfect the technology is, it cannot take into account all the diversity of the creative process, so the unity of the technical component with the spiritual-personal and socio-pedagogical is necessary. In a living process, it is impossible to “separate” the technological subsystem, as all other components are interconnected. Therefore, it is necessary to abandon attempts to rigidly fix its scope. It is important to trace the “transition” of technology into the relationship between the subjects of the real process. Pedagogical skill is to find a technological solution for the development of the whole set of personality qualities. Methods of teaching choreographic disciplines, as a rule, are abstracted from specific concepts of personality. The construction of the technology of training choreographers involves the “selection” of those parts of the whole personality that are in the perspective of pedagogy. This means that the pedagogical interpretation of personality, having its own specifics, takes into account the knowledge of personality, which gives philosophy, psychology, sociology, but builds this knowledge as subordinates to the problems of pedagogical research. Keywords: choreographer, professional training, professional skill, technology, pedagogical technology, technological scheme, professional self-determination, pedagogical qualities of personality.

Mining and metallurgical business: technological and integration features of management

The organizational and technological features of the functioning of the mining and metallurgical business are considered. The special significance of its consideration from the standpoint of balance and integration of elements of a single production chain for the production of final metallurgical products is shown. The main criteria of efficiency of integration interaction of mining and processing and metallurgical plants are developed. Recommendations on the organization of monitoring the quality of functioning of the unified technological chain of the mining and metallurgical business are given.

INVESTIGATION OF THE TEMPERATURE FACTORS INFLUENCE ON OPERATING SAFETY THE SUBMERSIBLE ELECTROMECHANICAL CONVERTER

The article presents a mathematical model of the thermal field for determining the values of temperatures during the submersible electromechanical converter operation. The influence of obtained temperature values on the safety and reliability of the submersible electromechanical converter is analyzed. In a submersible electromechanical converter the windings temperature has great importance. On the one hand, the windings temperature must be such as to transfer a sufficient amount of heat to the viscous loading environment for its processing (movement, transportation, etc.) to begin. On the other hand, the windings temperature must not exceed the limit values for the corresponding insulation class, since this can cause an emergency (fire, short circuit, etc.) The obtained results shows, that temperature on the surface of rotor's cylinders reaches 135 ° C, which provides rapid heating of a viscous substance, and therefore high performance of the pumping process. In this work, the bitumen BND 200/300 was used as the loading and cooling environment. The flash point of this brand of bitumen is 220 ° C and characterizes the degree of flammability of bitumen when it heated. Bitumen does not reach the maximum allowable temperature as a result of heating by means of submersible electromechanical converter that creates a safe temperature corridor in a technological chain at its processing. The temperature of the outer surface of the submersible electromechanical converter, with which the service technical staff may have a contact, does not exceed 20 ° C (Fig. 3), which is completely safe and does not endanger the workers health or life. Also, the obtained temperatures values are within the permissible limits of the heat resistance class of a winding electrical insulating material (H - 180 ° C), which also contributes to the safe submersible electromechanical converter operation.