Journal of Coal Chemistry最新文献

{"title":"Problems of de-phenolization and improvement of the quality of the absorbing fraction (review).","authors":"A. Bannikov, O. Borysenko","doi":"10.31081/1681-309x-2023-0-1-18-24","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-1-18-24","url":null,"abstract":"PROBLEMS OF DE-PHENOLIZATION AND IMPROVEMENT OF THE QUALITY OF THE ABSORBING FRACTION (REVIEW) © A.L. Bannikov, post graduate student (National Technical University «Kharkiv Polytechnic Institute», 2 Kyrpychova Str., Kharkiv, 61002, Ukraine), O.L. Borysenko, PhD in Technіcal Sciences (State Enterprise \"Ukrainian State Scientific Research Institute of Coal Chemistry (UKHIN), 7 Vesnina str., Kharkiv, 61023, Ukraine) It is shown that improving the quality of absorbent oil is now becoming an important economic task due to the need to purchase an imported absorbent of benzene hydrocarbons from coke oven gas. The need for economical consumption of fresh oil to replenish the circulation cycle determines the main requirement for the quality of the fresh absorbent. The state of the equipment and the capabilities of the technological regime of benzene departments (increased absorption temperature, insufficient heating before distillation, watering of the absorber as a result of frequent shutdowns, etc.) make it necessary to look for an oil that would provide low specific consumption in this situation. The issue of dephenolization of the wash oil fraction remains controversial, and arguments for and against de-phenolization are presented. It is shown that the de-phenolization stage with the existing sodium phenolate processing cycle cannot function in the current conditions. Stricter requirements for the management of intermediates and waste make it necessary to switch to an alternative method. The rejection of alkaline extraction of phenolics has led to the development of new separation methods for purification of coal tar distillation fractions. In particular, the wash oil fraction is still the subject of research in order to extract various individual products and groups of substances from it with new types of extractants. Data on recent studies of phenol extraction from coal fractions using completely new materials are presented. It is concluded that there are currently no new proposals ready for industrial implementation. For the functioning of fractional de-phenolization at Ukrainian enterprises, it is necessary to develop a new method with an acceptable level of processing, and extraction de-phenolization seems to be the most promising. Keywords: coal tar fractions, phenols, specific consumption, de-phenolization, extraction, ionic liquids.. Corresponding author: Bannikov Artem L., e-mail: artiksmartik@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124747986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Technological aspects of obtaining and properties of polymer hydrogels and biofilm modified with the humic acids of brown coal.","authors":"Zhang Xiaobin, L. V. V., M. D. V., Shulga I. V., Lysenko L. A., Popov E. N.","doi":"10.31081/1681-309x-2022-0-2-12-21","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-2-12-21","url":null,"abstract":"The article studies the properties and technological features of obtaining of the polymer hydrogels (based on gelatin) and the biofilms (based on polyvinyl alcohol and hydroxypropyl methylcellulose) modified with humic acids. Practical aspects of the use of brown coal derivatives in the form of humic acids for the modification of bioplastics and polymeric hydrogels have been considered. The high prospects and efficiency of the use of humic acids in the modification processes of polymeric materials of various origins have been proved. It was noted that humic acids have a specific effect on the formation of an ordered structure in polymers, which is due to the different specific characteristics of humic substances: the degree of metamorphism of the original coal, the yield of volatile substances and the oxygen content. As a result of the research, polymer hydrogels based on gelatin with a high degree of swelling were obtained, as well as packaging biofilms based on polyvinyl alcohol and hydroxypropyl methylcellulose with antibacterial properties. It was established that the modification of gelatin-based polymer hydrogels with humic acids makes it possible to obtain a polymer hydrogels with an increased degree of swelling and to impart antibacterial properties to them. This is confirmed by the data of the indicator \"time to the mold formation\". It has been shown that the modification of biofilms based on hydroxypropyl methylcellulose with humic acids makes it possible to obtain strong water-soluble films with antibacterial properties for use as packaging materials for dry food products with a prolonged shelf life. The article also presents the developed technological schemes for obtaining the mentioned materials. A preliminary assessment is given of the economic efficiency of the developed materials modified with humic acids, which proves their sufficient profitability. Keywords: humic acids, modification, polymer hydrogels, biofilms, economic efficiency. Corresponding author D. V. Miroshnichenko, e-mail: dvmir79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126992914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coke dry cooling plant excess gas utilization.","authors":"S. Kravchenko, D. Miroshnichenko","doi":"10.31081/1681-309x-2023-0-2-3-9","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-2-3-9","url":null,"abstract":"COKE DRY COOLING PLANT EXCESS GAS UTILIZATION © S.A. Kravchenko, PhD in Technical Sciences (STATE ENTERPRISE \"STATE INSTITUTE FOR DESIGNING ENTERPRISES OF COKE OVEN AND BY-PRODUCT PLANTS'' (SE \"GIPROKOKS'')\", 60 Sumska str., Kharkiv, 61002, Ukraine), D.V. Miroshnichenko, Doctor of Technical Sciences (National Technical University \"Kharkiv Polytechnic Institute\", 61002, Kharkov, Kirpichev str., 2, Ukraine) At coke-chemical enterprises, that operate coke dry cooling plants, due to the peculiarities of the technology, an excess of circulating gas is formed, which must be constantly removed from the closed circuit. This article examines two operating plants designed for the utilization of excess circulating gas, and also presents some experience of their exploitations. In particular, information is provided on the method of disposal of excess circulating gas of coke dry cooling plants in an additional boiler by burning it in a mixture with coke gas. The main equipment of the recycling unit is a KO-10 steam boiler with forced circulation and a U-shaped arrangement of heating surfaces, located in the building of the boiler coke dry cooling plant of coke batteries of one of the coke-chemical enterprises. Tests and operation of the plant confirm the possibility of producing a couple of energy parameters on it with the achievement of high environmental indicators as a result of the utilization of excess gas of the coke dry cooling plant. The second direction considered is the use of excess gas from the coke dry cooling plant as fuel. The possibility is shown of increasing its calorific value as a result of mixing circulating gas with gas of higher calorific value – in particular with blast furnace gas. It is shown that the existing positive experience of operating the mentioned installations allows recommending both directions for the utilization of excess circulating gas for use on existing and newly designed coke dry cooling plants. According to the article, the work experience, a lot of experiments and performed calculations indicate the expediency of maintaining the regime with the maximum permissible content of CO in the circulating gases during the operation of the coke dry cooling plants. This allows to increase the quality indicators of coke. The high content of CO in the circulating gases also makes it possible to significantly reduce losses from coke burning in the process of dry cooling. Keywords: coke dry cooling, recovery boiler, circulating gas, excess, utilization, additional boiler, increase in calorific value, CO content, coke quality. Corresponding author S.O. Kravchenko, e-mail: sa_kravchenko@giprokoks.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114065237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Causes of deviations of real values of the dynamic viscosity of low-pyrolyzed coal tar from the predicted values.","authors":"Bannikov L.P.","doi":"10.31081/1681-309x-2022-0-6-17-22","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-6-17-22","url":null,"abstract":"It is known that coal tar is a viscous multicomponent dispersed system, the dispersed phase of which includes particles insoluble in toluene and quinoline (small particles of coke, coal, etc.), as well as water droplets. Dynamic viscosity is an integral characteristic, because its value carries information about the resulting value of several important indicators. This is especially true for low pyrolysis tars, which is currently the most liquid on the domestic and world markets. The statistic shows that the complexity of the component composition of the tar, as well as its properties as a complex dispersed system, is the cause of significant deviations between the predicted and actual viscosity values. The rheological characteristics of the tars under study were determined on a Brookfield DV2T rotational viscometer with a thermal cell at varying temperature and shear rate. The temperature dependence of viscosity was estimated by the equations widely used in the literature, in particular CornellisenWaterman and DIPPR 101. Comparison of the temperature dependences of viscosity of two samples of low pyrolysis resins (R1 and R2) showed that the rheological behavior of resin R1 is in good agreement with the flow character predicted by the Cornellisen-Waterman and DIPPR 101 equations, and the behavior of resin R2 can be considered uncharacteristic for coal tar. In our opinion, the relatively high content of phenols causes a significant polarization of the components of R2 resin, and intermolecular interactions are established between polar substances, which complicate the flow of the tar. This is consistent with the existing ideas about the higher viscosity of polar aromatic substances compared to nonpolar ones, and the flatter viscosity-temperature dependences are inherent in hydrocarbons with low dipole moment. Studies of the effect of the content of dispersed particles in the tar have shown that with increasing water content in the emulsion \"water-in-resin\" the viscosity of the system increases more noticeably, the lower the temperature. The obtained data indicate the need to make adjustments to the calculated viscosity values of coal tar of low pyrolysis taking into account the factors considered above. Key words: coal tar, viscosity, temperature, rotational viscometer, degree of pyrolysis, polarity of the tar, quinoline insoluble substances. Corresponding author: Bannikov Leonid P., e-mail: ukhinbannikov@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126461688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the volume of chemical production of ukrainian coke-chemical enterprises in 2020.","authors":"Kravchenko S.A., Starovoit A.G., Turkina O.V., Chaplianko S.V.","doi":"10.31081/1681-309x-2022-0-5-25-32","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-5-25-32","url":null,"abstract":"There has been carried out an analysis of the volume of chemical production for 2020 of eight Ukrainian coking enterprises and industries that were located in the territory controlled by Ukraine. It is shown that the maximum number of chemical products captured from coke oven gas accounted for anhydrous coal tar (419.1 thousand tons), crude benzene processing products - for commercial benzene (3.7 thousand tons), coal tar processing products - for coal tar pitch (96.4 thousand tons). Compared to 2019, the maximum increase in production volume in 2020 was accounted for by benzene polymers (by 4.5 times), technical solvent (by 2 times), distillation residues (by 2 times), head fraction (not produced in 2019), anthracene fraction (1.5 times), the maximum decline - for sulfuric acid (1.2 times), concrete mix plasticizers (not produced) and light-medium oil (1.3 times). On average for enterprises: out of 1 ton of dry charge, the yield of coal tar was 3.45 %, ammonia - 0.33 %, crude benzene - 0.68 %, and the maximum yield of the total consumption of raw materials fell on technical benzene - 58.3 % and medium-temperature pitch - 28.4 %. The properties of the same chemical products produced at different enterprises corresponded to different brands or grades, which is explained by the difference both in the quality of raw materials and in the features of production processes. Chemical products of coke companies were used in various industries as finished products or raw materials. Due to the destruction and damage of coke enterprises that were under the influence of hostilities or the disruption of the logistics supply of raw materials and energy resources, the issue of the ability of domestic coke enterprises to produce products becomes very relevant. The analysis given in the article should be used to assess the damage caused to domestic enterprises by the armed aggression of the Russian Federation. Key words: analysis, coke production, chemical products, coal tar, ammonium sulfate, benzene, sulfuric acid, coal tar pitch, coal oils, phenolates. Corresponding author: S.V. Chaplianko, e-mail: chaplianko_sv@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131837966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversification of sources of hydrocarbon raw materials for the production of motor fuels in Ukraine.","authors":"А.V. Сhernyavsky, A. Grigorov","doi":"10.31081/1681-309x-2023-0-1-24-32","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-1-24-32","url":null,"abstract":"DIVERSIFICATION OF SOURCES OF HYDROCARBON RAW MATERIALS FOR THE PRODUCTION OF MOTOR FUELS IN UKRAINE © А.V. Сhernyavsky, A.B. Grigorov, Doctor of Technical Sciences (National Technical University \"Kharkiv Polytechnic Institute\", 61002, Kharkov, Kirpichev str., 2, Ukraine) The article presents the results of the analysis of existing domestic and foreign data on the use of various hydrocarbon raw materials and technologies for the industrial production of motor fuels. The use is substantiated in motor fuel technology of such raw materials as: agricultural crops, solid combustible fossils (hard and brown coal, shale and lignite), production waste (used lubricating oils and used car tires) and consumption (polymer products). World trends and technologies has been analyzed, which are the most often used today in the field of motor fuel production from various types of hydrocarbon raw materials, alternative to petroleum raw materials. It has been determined that biofuel based on ethyl alcohol, despite its high resistance to detonation and environmental properties, has a lower heat of combustion, high solubility in water and hygroscopicity, compared to classic petroleum fuel. Technologies for obtaining components of motor fuels from coal raw materials and shale, in particular gasification and hydrogenation, are characterized by the complexity of the process, high temperatures and pressure of the process and the need to use expensive catalysts. The use of production waste in motor fuel technology is due to the fact that sulfur, which is in the raw material, is poison for catalysts and can become part of the final product. And to give it the properties of commercial motor fuel, it is necessary to carry out additional cleaning. Among the considered raw materials, as a result of the low cost, relative ease of processing and the level of quality of the obtained final product - commercial motor fuel, the most promising are secondary polymer materials, represented by polyethylene and polypropylene products. The processing of secondary polymer raw materials into motor fuels or their components, using catalytic low-temperature pyrolysis (temperature up to 600 °C) on a zeolite-containing catalyst, allows you to obtain products that can be used in specific operating conditions, for example, in shipping, as marine fuel. Keywords: raw materials, ethyl alcohol, coal, gasification, hydrogenation, polymers, catalytic pyrolysis, motor fuel, marine fuel. Corresponding author: A.B. Grigorov, e-mail: grigorovandrey@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129492313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amino-1,2,4-triazoles as a raw material for the fine organic synthesis industry (review).","authors":"Nazarov V.N., D. Miroshnichenko, A. A. Ivakh, B. Uspensky","doi":"10.31081/1681-309x-2021-0-4-27-36","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-4-27-36","url":null,"abstract":"AMINO-1,2,4-TRIAZOLES AS A RAW MATERIAL FOR THE FINE ORGANIC SYNTHESIS INDUSTRY (REVIEW) © V.N. Nazarov, PhD in technical sciences, D.V. Miroshnichenko, Doctor of Technical Sciences, A.A. Ivakh, B.V. Uspensky (NTU \"Kharkov Polytechnic Institute\", 61002, Kharkov, Kirpicheva st., 2, Ukraine) The review summarizes the information on the industrial use of 3- and 4-amino-1,2,4-triazoles - the basic raw material for the industry of fine organic synthesis. 3 and 4-substituted amino-1,2,4-triazoles have been used for a long time in the production of agricultural products, pharmaceuticals, dyes, high-energy materials, and anti-corrosion additives. Less well known is their use for the production of analytical reagents, flotation reagents, as well as for the production of heat-resistant polymers, products with fluorescent properties and ionic liquids, which are used in applied sciences, biotechnology, energy, and chemistry. The purpose of this communication is to consider in detail the participation of 3- and 4-amino-1,2,4- triazoles in the production and use of various agricultural and medical products. Descriptions and schemes of chemical reactions of existing production methods for the synthesis of 3- and 4-amino-1,2,4-triazoles, as well as some methods of obtaining these substances in laboratory conditions, are given. The two main areas of use of these amines and their derivatives: agriculture and medicine have been highlighted. It is shown that one of the most well-known branches of widespread use of 3- and 4- amino-1,2,4-triazoles in agriculture is the production of plant protection products. On the basis of these substances, the mass production of various insecticides, fungicides, plant growth regulators, retardants (means for suppressing the growth of stems and shoots), inhibitors of nitrification of nitrogen fertilizers is organized. The use of these amines in medicine consists in the production of known drugs on their basis, such as furazonal (has a pronounced antimicrobial effect, is effective against Staphylococcus aureus, dysentery bacteria, salmonellosis), thiotriazoline and cardiotril (cardiological drugs with anti-ischemic and membrane stabilizing effects) (platelet growth factor antagonist). Keywords: amino-1,2,4-triazoles, production, raw materials for synthesis, pesticides, pharmaceuticals. Corresponding author V.N. Nazarov, е-mail: рiren66@ukr.net","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130751706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction for calculating the grinding capacity coefficient of coal charges.","authors":"Miroshnichenko D.V., Kovalchuk V.V.","doi":"10.31081/1681-309x-2022-0-6-4-12","DOIUrl":"https://doi.org/10.31081/1681-309x-2022-0-6-4-12","url":null,"abstract":"It is shown that the method for determining the grinding ability according to Hardgrove remains and it is the most common, informative and universal of all the methods for assessing the physical and mechanical properties of solid fossil fuels from the point of view of their industrial processing. Therefore, it is of practical interest to formulate the main principles for determining the grind ability of real industrial coal charges by this method. The actual approved coal charges of the main coke-chemical enterprises of Ukraine at the time of the experiment (January 2022) were taken as objects of study. The components of the charge were distributed by grades, coal of each grade was represented by one typical component of this grade, the participation of which in the charge is the largest. The studied coal grades were subjected to technical, plastometric, petrographic, elemental and granulometric (>13; 3–13; 1–3; 0.5–1; <0.5 mm) analyzes. In addition, the indicators of oxidation of this coal were determined. The coefficients of grinding ability HGI of coal mixtures, which included coal of different degrees of metamorphism of four main grades, were determined. The presence of systematic deviations of the actual values of HGI coal charges during their joint preparation from their calculated values in the direction of decreasing the HGI coefficient (to harder coal) has been established. It has also been established that as the grind ability coefficient increases, its deviation from the calculated values decreases. A mathematical dependence has been revealed that makes it possible to predict the HGI value of coal charge according to the data on the grind ability coefficients of individual components. It is shown that forecasting the values of the HGI grind ability coefficients of coal charges by the content of vitrinite in them, as well as by the formula for calculating HGI from Vdaf, is inappropriate due to the low level of correlation and determination coefficients. Keywords: coal, coal blends, Hardgrove HGI, additivity, graphical dependencies, mathematical equations. Corresponding author V.V. Koval, e-mail: kovalen79@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"45 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122949597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of mineral matter of coal particles on coal tar watering.","authors":"L. Bannikov, N. V. Mukina","doi":"10.31081/1681-309x-2023-0-2-9-13","DOIUrl":"https://doi.org/10.31081/1681-309x-2023-0-2-9-13","url":null,"abstract":"INFLUENCE OF MINERAL MATTER OF COAL PARTICLES ON COAL TAR WATERING © L.P. Bannikov, PhD in Technіcal Sciences (State Enterprise \"Ukrainian State Scientific Research Institute of Coal Chemistry (UKHIN), 7 Vesnina str., Kharkiv, 61023, Ukraine), N.V. Mukina (PJSC “ArcelorMittal Kryvyi Rih”, 1 Ordzhonikidze St., Krivoy Rog, Dnepropetrovsk region, 50095, Ukraine) The mineral part of the coal matter can serve as an important indicator of surface phenomena occurring during separation and preparation for processing of coal tar. Moreover, the analysis of the mineral part of coal tar and pitch during further processing shows that the ratio SiO2/Al2O3 does not change. This makes it possible to determine by the value of the ratio the belonging of the clay component of the mineral part of coking coals to montmorillonite, if the ratio is in the range from 2 to 5,5 (typical case ≈3,3). It is determined that the flotation concentrate yield and selectivity for the coal-montmorillonite system are lower than for the coal-kaolinite system, which is explained in terms of the theory of lyophobic colloid stability. The reasons for the deterioration of flotation due to the presence of bentonite in the mineral part of coal are considered, which is extended to the conditions of formation of coal tar emulsions stabilized by mineral-coal particles. It is shown that the absence of bentonite (montmorillonite) inclusions should be considered a typical case of the composition of the mineral part of coal. The results of determining the composition of the ash isolated from a sample of resin with a high degree of watering showed that in the analyzed case, the high stability of the \"water-in-tar\" emulsion is due to the presence of bentonite inclusions. To confirm the feasibility of determining the ratio of SiO2/Al2O3 ash substances as an indicator of the influence of the mineral part of coal on the surface phenomena occurring in coal tar and its products, the case of atypical deposits during the filtration of coal electrode pitch before the formation of pellets was investigated. The analysis of sediments from the pitch melt revealed that the SiO2/Al2O3 ratio was 2.7-3.2. Keywords: coal matter, mineral part, clay inclusions, montmorillonite, surface phenomena, flotation, stabilization of «water–in–tar» emulsion. Corresponding author Bannikov Leonid P., e-mail: ukhinbannikov@gmail.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131125050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of coal charge for coke battery complex №. 5, 6 at Coke Production of PJSC «ArcelorMittal Kryvyi Rih».","authors":"N. V. Mukina, A. Chernousova, D. Miroshnichenko, N. Desna, A. Sytnik, V. V. Koval","doi":"10.31081/1681-309x-2021-0-3-8-20","DOIUrl":"https://doi.org/10.31081/1681-309x-2021-0-3-8-20","url":null,"abstract":"PREPARATION OF COAL CHARGE FOR COKE BATTERY COMPLEX NO. 5, 6 AT COKE PRODUCTION OF PJSC «ARCELORMITTAL KRYVYI RIH» © N.V. Mukina, A.P. Chernousova (Coke Production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), D.V. Miroshnichenko, Doctor of Technical Sciences (NTU \"Kharkov Polytechnic Institute\", 61002, Kharkov, Kirpicheva st, 2, Ukraine), N.А. Desna, PhD in technical sciences, A.V. Sytnik, PhD in technical sciences, V.V. Koval (State Enterprise \"Ukrainian State Research Coal Chemical Institute (UHIN)\", 61023, Kharkov, Vesnina st., 7, Ukraine) The article highlights the methodological foundations and the results of research on the development of criteria and practical recommendations aimed at optimizing the composition of coal charges of coke oven batteries No. 5, 6 of the coke-chemical production of РJSC \"ArcelorMittal Kryvyi Rih\" to obtain coke of the required quality from the rammed charge. The defining indicator of the production of coke using the technology of compaction of coal charges is the strength of the compacted cake. The most successful way to determine this indicator is to assess the strength by an indirect method according to the value of the shear strength (ϭss) of rammed batch samples in laboratory conditions. This method allows to identify changes in the strength of the coal cake and take the necessary measures to prevent or minimize the number of collapses during loading. The article gives images of installations for laboratory compaction of coal charge and determination of the shear strength of the resulting cake; the methodology for determining this indicator is given. As a result of the above studies, it has been established that the density of the tamped cake from crushed individual coals included in the raw material base of the by-product coke production of РJSC \"ArcelorMittal Kryvyi Rih\" is closely related to the content in coal raw materials of classes <3 and <0.5 mm. An increase in the content of classes <3 and <0.5 mm leads to an increase in the index ϭss. It is also shown that the actual values of ϭss for binary coal mixtures are higher than the calculated ones. It has been established that with an increase in the level of grinding of coal charges from 90,1 to 92,2 %, an increase in the value of the index ϭss is observed from 12.5 to 15.0 кРа, that is, by 20 %. With an increase in the moisture content of the charge from 10,0 to 11,5 %, the strength of the compacted cake increases. An increase in the moisture content above 12 % is undesirable due to a decrease in the strength of the rammed coal cake, as well as an increase in heat consumption for coking due to the consumption of moisture evaporation. Keywords: coal, preparation, shear strength of the rammed cake, moisture content, particle size distribution. Corresponding author N.V. Mukina, е-mail: Natalia.Mukina@arcelormittal.com","PeriodicalId":296617,"journal":{"name":"Journal of Coal Chemistry","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134599687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}