Improving the technology production of coke for blast furnace smelting

Lyalyuk, Vitaliy; Shmeltser, Ekaterina O.; Kassim, D. A.

doi:10.46489/ittpoc-229

Cited by 3 publications

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“…Крім зазначених енергетичних функцій кокс виконує функцію твердого насаду в зоні розм'якшення та плавлення залізовмісних матеріалів, що забезпечує протитечію шихти та газів у печі, а також функцію регулятора газорозподілу по площі поперечного перерізу агрегату. У зв'язку з цим до якості коксу і висуваються високі вимоги (Lyalyuk et al, 2022).…”

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Influence chemical composition of the coal mineral substance on the thermochemical properties blast furnace coke

Shmeltser,

Kormer,

Liakhova

2023

ete

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The effectiveness of coke functions in the blast furnace process largely depends on its reactivity. The reactivity of coke affects the course of blast furnace smelting, especially the profile of temperature distribution and gas flows in the furnace, and the degree of gas utilization and the specific consumption of reducing agent. It is shown that the reactivity of coke depends not only on its ash content, but also on its qualitative characteristics, that is, on the total content of oxides of various types, which affect the rate of reaction of carbon with carbon dioxide. The basic equations for calculating the ash basicity index of the batch are given, which are used to quantitatively assess the influence of ash components on the thermochemical properties of coke. It has been established that by calculating the basicity index, it is possible to provide a reasonable comparative assessment and characterize the technological value of coal concentrates and batches, as well as to quickly adjust the composition of production batches. Forecasting the quality of coke based on the properties and composition of coal batches is important for the long-term planning of supplying coke plants with coal for coking and for optimizing the composition of coal batches in the production process. The various mathematical models for predicting reactivity (CRI) and coke post-reaction strength (CSR), including using the genetic characteristics of coal, the chemical composition of their mineral substance was analyzed in the article. An equation is proposed for calculating the predictive indicators of CSR and CRI based on the basicity index of the batch ash for the raw material conditions of coke plant "ArcelorMittal Kryvyi Rih". The dependences of the CSR and CRI indicators of coke on the ash basicity index Iо of the batch and on the ash basicity index of the Иo batch were constructed, taking into account the ash content and yield of volatile substances of the batch. The use of the proposed equations will allow to optimize the composition of the production coal batch and achieve an increase in the quality of coke according to the post-reaction strength (CSR) indicator by 3-3.5%.

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Section: вступ (Introduction)unclassified

Influence chemical composition of the coal mineral substance on the thermochemical properties blast furnace coke

Shmeltser,

Kormer,

Liakhova

2023

ete

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“…Given that coke is the most expensive component of the cast iron charge, the task of reducing its consumption is always relevant. It can be solved by replacing coke with less expensive energy sources 9 .…”

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Modern Use of Biochar in Various Technologies and Industries. A Review

Miroshnichenko,

Zhylina,

Shmeltser

2024

ChChT

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The article analyzes the use of biochar in various industries and the national economy (as a sorbent, fuel, reducing agent in the metallurgical industry, a component of coal coke blends, biocomposites, modification of explosives, fertilizers, etc.) It is noted that the direction of use depends on the quality and characteristics of biochar (size, physical properties, chemical composition), which are determined by the nature of the raw material, its chemical composition and carbonization temperature.

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Analytical Research of the Results of Social and Economic Development Program Implementation by the Local Authorities of Kryviy Rih and Strategic Goals of Its Achievement

Kotkovskyi,

Nieizviestna,

Kudin

2023

Visnyk DonNUET

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Objective. The objective of the study is the substantiation of the goals and principles of state programs of regional development, the identification of influencing factors on the process of developing programs of socio-economic development of the city of Kryvyi Rih, and the development of strategic directions for the effective and efficient implementation of regional development programs. Methods. When preparing the article, general and special methods of scientific research are used, in particular, the method of retrospective analysis and synthesis - to generalize the main theoretical approaches to the formation and implementation of the local socio-economic development program and the order of its development; dialectical method - for a comprehensive study of relations between state administrations and local authorities; graphoanalytical – for a schematic representation of the theoretical and practical provisions of the research; method of system analysis - to determine the priority directions of reforming the socio-economic development program by the local authorities of a specific territorial community. Results. The definition of «local program of economic and social development» is studied, in particular according to the term, as well as the concepts of «regional development program» and «budget programs», which are closely related to the local program of socio-economic development. It is proved that the principles of development of local socio-economic development programs are defined as the expected achievements based on the results of the implementation of a complex of interrelated tasks and measures aimed at solving the most important issues of the development of the united territorial community. Analytical studies of the results of the implementation of the Social Protection Program for certain categories of Kryvyi Rih residents and the dynamics of the total amount of funding under this program for 2018-2022 are out. It is determined that in order to implement the measures of the Program for the Perspective Development of Education in Kryvyi Rih for 2019-2024, free meals are provided to pupils and children from large families in general education institutions of the city, children from student families in preschool institutions of the city, children whose parents were involved or killed or went missing as a result of the events in the East of Ukraine. It is noted that culture, the financing of which is provided for by the legislation of Ukraine from the local budget, is of no less importance for the development of Kryvyi Rih in the humanitarian sphere.. Special attention is paid to the Program for the reimbursement of part of the loans provided by the association of co-owners of apartment buildings and housing and construction cooperatives for the implementation of energy-efficient measures in the housing sector for 2016-2023. It is emphasized that for the purpose of social support of all categories of citizens of Ukraine who are in the territory of the Kryvyi Rih urban territorial community, during the period of martial law in Ukraine, and to increase their social security, free travel in public municipal public transport is introduced in the city. It should be noted that the Strategic Development Plan of the city of Kryvyi Rih for the period until 2025 has been approved at the local level, based on a transformational version of the city's development, which reflects the focus on supporting the positive development vector of all spheres of the city's life, innovative renewal and diversification of the economy. It is emphasized that the chosen Strategy provides for the provision of coordinated joint actions of local executive bodies and local self-government bodies in the conditions of a military/post-war state in order to implement a unified state policy for the development of Ukraine at the district level. The authors formulate strategic directions for effective and efficient implementation of Kryvyi Rih Socio-Economic Development Program for 2023-2025 based on the principles of developing local socio-economic development programs, namely: decentralization of management; development of interregional cooperation; implementation of a system for identifying and assessing priority social problems of a certain territory; optimization of state management structures and procedures; implementation of an active resource strategy by bodies of executive power and local self-government; promotion of public activity and development of various forms of self-organization of the population; raising the level of social culture and education of employees of state administration and local authorities, deputies of all levels.

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Improving the technology production of coke for blast furnace smelting

Cited by 3 publications

References 0 publications

Influence chemical composition of the coal mineral substance on the thermochemical properties blast furnace coke

Influence chemical composition of the coal mineral substance on the thermochemical properties blast furnace coke

Modern Use of Biochar in Various Technologies and Industries. A Review

Analytical Research of the Results of Social and Economic Development Program Implementation by the Local Authorities of Kryviy Rih and Strategic Goals of Its Achievement

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