Coke and Chemistry最新文献

{"title":"Termokoks SHP Technology: Intense Partial Gasification of Lignite","authors":"D. A. Loginov,&nbsp;S. R. Islamov,&nbsp;A. P. Chernykh,&nbsp;A. Yu. Uzkikh","doi":"10.3103/S1068364X26600120","DOIUrl":"10.3103/S1068364X26600120","url":null,"abstract":"<p>In experiments, the improved version of Termokoks-S technology for partial gasification of lignite is studied. The improvement is that gasification is conducted at high pressure (HP), with higher productivity. The characteristics of the resulting carbonizate and the productivity of the process are determined as a function of the temperature and pressure. Increasing the pressure from 0 to 2.0 MPa increases the productivity by almost an order of magnitude (by a factor of 8.8) thanks to significant increase in the velocity of the physicochemical conversion front. However, the processing of the coal particles is less profound, and consequently the residual content of volatiles in the carbonizate is greater. With the recommended yield of volatiles (15%) and a pressure of 2.0 MPa, the productivity is triple the maximum value at atmospheric pressure. The high-pressure version of the technology, known as Termokoks-SHP, may be used to process not only coal but other carbon-bearing materials.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 2","pages":"61 - 64"},"PeriodicalIF":0.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060745","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":"Petrographic Characteristics of Anthracite from the Tom-Usinsky Geoeconomic District","authors":"D. S. Kurchkin,&nbsp;A. A. Bobrovnikova","doi":"10.3103/S1068364X26600119","DOIUrl":"10.3103/S1068364X26600119","url":null,"abstract":"<p>This research is prompted by the need for better understanding of solid fuels, in the context of their practical application. Detailed analysis of the material and petrographic composition of such fuels is essential in order to predict their behavior and to identify appropriate industrial uses. With sufficient detail, specialists may progress from the general characteristics of a field to well-founded technological approaches. The maceral composition of the coal is of particular importance in this respect: it reflects the internal structure of the organic material and directly influences the classification of the coal and its assignment to specific technological and industrial groups. It is not by chance that the maceral composition is employed as the basic characteristic of coal in standard documents, including State Standard GOST 70207–2022, which regulates the system for coal classification and codification. Thus, the investigation of coal’s maceral composition cannot be regarded simply as a formal procedure. Rather, it is an essential stage in the assessment of coal and its industrial prospects. In this research, attention focuses on two anthracite samples from a coal section in the southwestern section of the Kuznetsk Basin. Technical and elemental analysis of the coal provides a comprehensive idea of its properties. Tests show that the coal is characterized by low ash content (∼4.0%) and minimum yield of volatiles (no more than 8%). The total sulfur content in the sample is also low (0.3% at most). The sulfur content is determined by means of a LECO SC-832 analyzer in accordance with State Standard GOST 8606–2015. The metamorphic stage of the anthracite samples is assessed on the basis of the reflection coefficient of vitrinite, generally regarded as a reliable indicator. The results permit the assignment of the samples to stages VII–VIII of the anthracite group according to State Standard GOST R 59261–2020. They correspond to group 1A and subgroup 1AF in the classification outlined in State Standard GOST 70207–2022; that indicates a high level of metamorphic development. Petrographic analysis of sections indicates that the inertinite group is dominant in the samples’ organic matter (65–69%). The main representatives of this group are semifusinite and sclerotinite. The vitrinite content is no more than 24–26%. Collinite plays the major role: it binds together the fusinized elements in the coal structure. These proportions of the macerals reflect the specific formation and subsequent metamorphic development of the anthracite.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 2","pages":"56 - 60"},"PeriodicalIF":0.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060742","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":"Two-Stage Processing of Fly Ash to Produce Liquid Glass and a Fenton Reaction Catalyst","authors":"E. G. Gazenaur,&nbsp;S. V. Luzgarev,&nbsp;A. S. Luzgarev,&nbsp;V. M. Pugachev,&nbsp;Ya. S. Gromysheva,&nbsp;A. A. Zvekov,&nbsp;A. V. Kalenskii,&nbsp;Yu. A. Sheveleva","doi":"10.3103/S1068364X26600156","DOIUrl":"10.3103/S1068364X26600156","url":null,"abstract":"<p>A method of processing fly ash by alkali treatment to produce aluminosilicate liquid is proposed and tested in laboratory conditions. The magnetic fraction is subsequently removed from the solid residue after leaching. Leaching is accompanied by solution of a considerable proportion of the amorphous glassy material covering the magnetic fraction, which consists mainly of magnetite. As a result, an aluminosilicate crystalline product is formed in the nonmagnetic waste. It is shown that the magnetic fraction may be used as a catalyst of the Fenton reaction in the oxidation of methylene blue; the effective rate constant of this reaction is proportional to the mass of catalyst introduced.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 2","pages":"78 - 83"},"PeriodicalIF":0.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060746","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":"Efficient Cyclone-Based Dust Capture Technology for Dry Quenching Systems","authors":"Zhiqiang Fan,&nbsp;Wenyu Yang,&nbsp;Yang Mao,&nbsp;Lin Li,&nbsp;Bencheng Chen,&nbsp;Yu Wang,&nbsp;Xiuhua Wang","doi":"10.3103/S1068364X26600089","DOIUrl":"10.3103/S1068364X26600089","url":null,"abstract":"<p>In the dry quenching of coke, the efficiency of dust capture directly determines the life of the waste heat boiler and has great influence on the overall operational stability of the system. In the present work, widely used methods of dust capture and their operating principles in the dry quenching system are reviewed. The configuration of the primary treatment cyclone is optimized by modeling. On that basis, a highly efficient dust capture technology for the dry quenching system is proposed. Practical experience shows that the efficiency of dust capture by the primary treatment cyclone is 93.88%. That eliminates the rupture of boiler tubes on account of abrasive wear and extends the life of the waste heat boiler.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"35 - 43"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751206","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":"Interaction of Reducing Gases with Pellets: Cellular Automaton Simulation","authors":"I. S. Bersenev,&nbsp;E. R. Sabirov,&nbsp;I. D. Plaksin,&nbsp;N. A. Spirin","doi":"10.3103/S1068364X26600065","DOIUrl":"10.3103/S1068364X26600065","url":null,"abstract":"<p>Ore pellets are commonly used in the blast furnace to produce pig iron and are practically the only raw material suitable for MIDREX and HYL furnaces. Therefore, it is of great importance to improve pellet quality and hence the efficiency of steel production. The reducing properties of the ore pellets are critical to furnace performance. In the present work, the role of pellet cracking in changing the reduction rate is studied. Cellular automata are used in simulating the pore structure of the pellets in a stream of reducing gas. The application of this method is shown to be feasible. The overall picture of the process obtained corresponds to empirical data. Reduction of the pellets’ pore structure by gas occurs in two stages, which differ in the rate of mass transfer. In the first stage, the reduction rate depends exclusively on the contact area of the phases. After surface reduction is complete, the reduction rate is determined by the gas diffusion within the pellet’s mineral component. Pellet cracking markedly increases the reduction rate in the initial stage: the number of reduced grains may be increased by as much as 100%. Positive feedback between the reduction rate and the growth rate of the cavity volume in the pellet is noted: these processes are mutually accelerating. The limiting factors are processes at the surface and gas transfer. In practice, there is no need to produce pellets with very high (&gt;95%) hot strength. Such pellets, while formally meeting the technical requirements, are reduced very slowly and retard the smelting process.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"14 - 22"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751203","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":"Coal Blending Methods and Coking Technology: A Review","authors":"A. P. Nikitin,&nbsp;R. Yu. Kovalev","doi":"10.3103/S1068364X26600041","DOIUrl":"10.3103/S1068364X26600041","url":null,"abstract":"<p>This systematic analysis of current coal blending methods and coking processes includes detailed investigation of key factors in ensuring adequate quality of metallurgical coke—in particular, the chemical and petrographic properties of the coal and the coking parameters. Special attention is paid to methods of optimizing the batch composition when using coal of limited metamorphic development and functional additives and to innovative coking approaches. The recommendations presented regarding batch compositions that yield coke with specified properties when high-quality coal is in short supply are or great practical importance. The results of this review will be of value to coke production specialists, scientists researching coal chemistry, and coke plant teams responsible for finding scientifically valid solutions to production problems.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"1 - 13"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751205","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":"Research on Methods for Rapid Determination of Harmful Elements Fluorine and Chlorine in Coal","authors":"Fang Yu,&nbsp; Limin Zhang","doi":"10.3103/S1068364X26600028","DOIUrl":"10.3103/S1068364X26600028","url":null,"abstract":"<p>Based on GB/T 4663-2014 (Determination Method of Fluorine in Coal) and GB/T 3558-2014 (Determination Method of Chlorine in Coal), after adjusting pH and constant volume of the aqueous solution absorbed by hydrolysis of coal sample by high-temperature combustion. The solution was accurately measured and divided into 2 parts. Fluorine ion selective electrode and potentiometric titration method were used to determine fluorine and chlorine in coal respectively. The content of fluorine and chlorine in coal is calculated by deduction. The study also explored the impact of the original absorption liquid transfer volume and the number of absorption stages on the determination results. Ultimately, a single-stage absorption with 10 mL of water as the absorption solution was selected. For the determination of fluorine content, 50 mL of the absorption solution was pipetted, while for the determination of chlorine content, 45 mL of the absorption solution was pipetted. In addition, through the study of precision and accuracy, it is confirmed that the method is not only less time and labor than the standard method, but also has the characteristics of good repeatability and reproducibility, simple and rapid operation.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"44 - 48"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751202","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":"Pore Structure of Carbonized Lignite Modified by Ferric Nitrate","authors":"I. Yu. Zykov,&nbsp;N. I. Federova","doi":"10.3103/S1068364X26600077","DOIUrl":"10.3103/S1068364X26600077","url":null,"abstract":"<p>The influence of added ferric nitrate on the pore structure of carbonized lignite is studied. The ferric nitrate Fe(NO₃)₃ is added by steeping in terms of the moisture capacity, with the following ratios of the anhydrous salt and the carbonizate: 0.20, 0.25, 0.33, and 0.50 g/g. (The ferric nitrate is first dissolved in dilute nitric acid solution.) The texture of the modified carbonizates is studied by analysis of the N₂ adsorption–desorption isotherms at 77 K (–195.97°C) on an ASAP-2020 system. The addition of ferric nitrate is found to produce carbon materials with higher specific surface and pore volume. The greatest increment in specific surface (by 30%) and pore volume (by 40%) is observed in samples with ratios of 0.20 and 0.25 g/g. With increase in the added ferric nitrate, the proportion of mesopores increases; it is greatest (54.6%) for the sample with a ratio of 0.50 g/g. According to energy-dispersive X-ray spectroscopy (EDX) and X-ray powder diffraction, the addition of ferric nitrate results in the formation of small magnetic Fe, γ-Fe₂O₃, and Fe₃O₄ particles on the surface of the carbon materials. Consequently, those materials may be retained by means of the field created by neodymium permanent magnets.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"30 - 34"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751204","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":"Supercapacitor Electrodes Based on Carbon Derivatives of Poorly Caking Coal","authors":"T. S. Nechaeva,&nbsp;N. S. Zakharov,&nbsp;G. Yu. Simenyuk","doi":"10.3103/S1068364X26600053","DOIUrl":"10.3103/S1068364X26600053","url":null,"abstract":"<p>The influence of two chemical activators (KOH and ZnCl₂) on the properties of porous carbon materials derived from naturally oxidized poorly caking coal (SS coal) is compared. It follows from cyclic voltammetry and low-temperature nitrogen sorption that potassium hydroxide produces an electrode material with excellent unit capacitance. That may be attributed to the highly developed surface and optimal pore structure (with a predominance of micropores) of the resulting carbon material, ensuring effective charge storage in a double electric layer. The rectangular voltammetric curve and weak dependence of the unit capacitance on the rate of potential scanning confirm the predominance of double layer charge storage and the satisfactory kinetic characteristics of the material produced. These results indicate that KOH-activated carbon materials based on SS coal may be used as highly efficient electrodes for supercapacitors.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"69 1","pages":"23 - 29"},"PeriodicalIF":0.5,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147751201","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":"Modifying the Hydraulic Drive for a Pumping Station","authors":"V. V. Tochilkin,&nbsp;S. I. Platov,&nbsp;L. V. Krupnov,&nbsp;D. S. Nosachev,&nbsp;S. A. Shlenkin","doi":"10.3103/S1068364X25601374","DOIUrl":"10.3103/S1068364X25601374","url":null,"abstract":"<p>Attention focuses on the selection of a hydraulic drive system and the use of hydraulic drive and hydraulic automation components for machinery: the electric depletion furnace; and the locomotive–quenching car system used in opening and closing the car’s aprons for coke discharge. The goal is to determine the best design for the hydraulic system in the pumping unit in order to ensure efficient operation of the coke plant’s machinery. The components of a pumping unit with a circulation pump are presented, as well as the hydraulic automation components for operation of the circulation pump. Efficient operation of the whole system is possible when using up-to-date cooling systems and hydraulic automation components in the circulation pump system. In particular, up-to-date hydraulic drive systems and hydraulic automation components ensure uniform coke discharge to the ramp.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 11","pages":"944 - 948"},"PeriodicalIF":0.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579342","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}