Coke and Chemistry最新文献_第7页

Erratum to: Influence of Mineral Compounds on the Extraction of Phenol from Mine Wastewater by Carbon Sorbents 勘误：矿物化合物对碳吸附剂从矿山废水中提取苯酚的影响

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X24010022

O. V. Belyaeva, N. S. Golubeva, N. V. Gora, I. V. Timoshchuk, E. S. Mikhaylova

引用次数: 0

Forms of Methane and Gas Releases from Coal Beds 煤层释放甲烷和瓦斯的形式

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X24600039

M. V. Shinkevich

{"title":"Forms of Methane and Gas Releases from Coal Beds","authors":"M. V. Shinkevich","doi":"10.3103/S1068364X24600039","DOIUrl":"10.3103/S1068364X24600039","url":null,"abstract":"<div>Generally, in underground mining, coking coal beds are gas-bearing and require degassing. Therefore, the gas dynamics of the bed is a key aspect in the development of coal–methane deposits. The prevailing standards are based on sorption theory, but current requirements are associated with new approaches to understanding gas liberation. New results based on the hypothesis of a coal–gas solid solution indicate that the irreversible decomposition of that solid solution due to the relaxation of the mine pressure provokes gas liberation from the bed in the appropriate conditions. Given the steady increase in the speed of face movement, it is clear that ideas from the past (1950s–1970s) regarding the properties of the coal bed and the processes that occur there do not meet current requirements. Since the breakdown of some part of the coal–gas solid solution changes the gas structure of the bed, we may determine the gas flow into the bed’s filtration volume by analysis of that breakdown. The gas balance equation in terms of the forms of methane in the bed takes account of the influence of methane in solid form on the sorptional potential of coal and permits quantitative assessment of changes in the gas structure within the bed under the influence of geomechanical mining processes.</div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 1","pages":"6 - 9"},"PeriodicalIF":0.4,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140933191","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}

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Influence of Elemental Sulfur on the Production of Materials for Road Surfacing 元素硫对公路铺面材料生产的影响

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X24600076

N. T. Smagulova, Zh. K. Kairbekov, Zh. K. Aibassova

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Erratum to: Major Wastewater Pollutants in Coal Mining 勘误：煤矿开采中的主要废水污染物

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X24010010

L. A. Ivanova, O. V. Salishcheva, I. V. Timoshchuk, N. S. Golubeva, A. K. Gorelkina

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Humic Substances from Oxidized and Unoxidized Coal 氧化煤和未氧化煤中的腐殖质

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X24600052

K. S. Votolin, S. I. Zherebtsov, K. M. Shpakodraev, A. L. Pykin, D. D. Shaymukhametova

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Effects of a New Synthetic Ionic Liquid on Caking Properties of Coals with Three Different Ranks 新型合成离子液体对三种不同等级煤结块特性的影响

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Coke and Chemistry Pub Date : 2024-05-13 DOI: 10.3103/S1068364X2460012X

Yuan Fang, Kangshun Han, Ying Chen, Shulin Wang, Zhigang Zhao, Xiangchun Liu, Ping Cui

{"title":"Effects of a New Synthetic Ionic Liquid on Caking Properties of Coals with Three Different Ranks","authors":"Yuan Fang, Kangshun Han, Ying Chen, Shulin Wang, Zhigang Zhao, Xiangchun Liu, Ping Cui","doi":"10.3103/S1068364X2460012X","DOIUrl":"10.3103/S1068364X2460012X","url":null,"abstract":"To reveal the molecular structure characteristics of the caking components in coal, three coals with different ranks were treated using a new synthetic ionic liquid (i.e., [N4441][NO3]), the combination of which is based on the effect degree of different anions and cations of ionic liquids on the caking properties of the coals. Additionally, the raw and treated coals were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman. The results showed that the caking index (G) values of the coals decreased after [N4441][NO3] treatment, and the destruction degree decreased with increasing coal rank. The decrease in G is related to the removal of some species during [N4441][NO3] treatment. FTIR and Raman showed that aromatics with 3 or more rings but less than that in graphite and long-chain aliphatics were removed. XRD showed that [N4441][NO3] treatment decreased the graphitization degrees of the coals. Additionally, a mechanism of destroying the caking property of coal using [N4441][NO3] is proposed. [N4441][NO3] treatment could decrease the contents of aromatics with 3 or more rings but less than that in graphite and long-chain aliphatics. Consequently, the caking property of coal is destroyed.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 1","pages":"61 - 71"},"PeriodicalIF":0.4,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140942571","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}

引用次数: 0

Review of Recent Research on Coke Gasification in a Blast Furnace with Elevated Hydrogen Levels and Determination of the Coke’s Postreactive Strength CSR. 1. Thermodynamic Analysis of Coke Gasification in the Presence of H2 and H2O 关于在氢含量较高的高炉中焦炭气化和确定焦炭后反应强度 CSR 的最新研究综述。1.存在 H2 和 H2O 时焦炭气化的热力学分析

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Coke and Chemistry Pub Date : 2024-03-19 DOI: 10.3103/S1068364X23600197

O. V. Golybev, P. I. Chernousov, A. Yu. Demidov, M. V. Slonov

{"title":"Review of Recent Research on Coke Gasification in a Blast Furnace with Elevated Hydrogen Levels and Determination of the Coke’s Postreactive Strength CSR. 1. Thermodynamic Analysis of Coke Gasification in the Presence of H2 and H2O","authors":"O. V. Golybev, P. I. Chernousov, A. Yu. Demidov, M. V. Slonov","doi":"10.3103/S1068364X23600197","DOIUrl":"10.3103/S1068364X23600197","url":null,"abstract":"<div>Today, blast furnaces tend to operate with large quantities of injected materials—hydrogen sources. In the 1960s, the introduction of such additives prompted close attention to the chemical processes in the blast furnace. In the last few decades, many researchers have studied the reaction of coke with atmospheres containing H2 and H2O. This sharp increase in interest may be attributed to the increasing presence of hydrogen in blast furnaces and to the availability of powerful methods such as X-ray phase analysis and electron microscopy and also software for digital image analysis and thermodynamic analysis. The thermodynamic laws and kinetics of blast furnace processes were studied. The results show that coke reacts with H2O more intensely and with greater intensity than it reacts with CO2. That affects the coke strength. Other research has addressed the influence of the H2 and H2O content on the porosity of the coke and its disintegration. Recently, thermodynamic analysis of the gasification of carbon from coke in a CO2 + H2O atmosphere (solution loss reaction of coke) by various research groups shows that increase in the H2O content in the initial gas further stimulates gasification. Thermodynamic analysis of the reactions associated with the gasification of coke by CO2 and H2O and the reduction of iron oxides (the coupling reaction) indicates that higher hydrogen content in the gas may shift the gasification of carbon to lower temperatures.</div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"66 12","pages":"603 - 612"},"PeriodicalIF":0.4,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140171824","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}

引用次数: 0

Benzo[a]pyrene Emission in the Carbonization of Pitch and Pitch–Coke Mixtures. Part 5 沥青和沥青-焦炭混合物碳化过程中的苯并[a]芘排放。第五部分

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Coke and Chemistry Pub Date : 2024-03-19 DOI: 10.3103/S1068364X23600215

O. F. Sidorov, A. A. Deryugin

引用次数: 0

Iron Oxides and Their Composition in Ceramic Brick Based on Power Plant Waste: Data from Mössbauer Spectroscopy 电厂废料陶瓷砖中的氧化铁及其成分：来自莫斯鲍尔光谱学的数据

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Coke and Chemistry Pub Date : 2024-03-19 DOI: 10.3103/S1068364X23600227

V. Z. Abdrakhimov

引用次数: 0

Low-Cost Ironmaking: Metallurgical Coal Prospective 低成本炼铁：冶金煤前瞻

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Coke and Chemistry Pub Date : 2024-03-19 DOI: 10.3103/S1068364X24600015

Naresh Sharma, H. P. Tiwari

{"title":"Low-Cost Ironmaking: Metallurgical Coal Prospective","authors":"Naresh Sharma, H. P. Tiwari","doi":"10.3103/S1068364X24600015","DOIUrl":"10.3103/S1068364X24600015","url":null,"abstract":"The hot strength and mechanical strength of metallurgical coke are the critical parameters for efficient blast furnace operation. Therefore, producing the desired qualities of coke like coke strength after reaction, coke reactivity index, and coke M10/M40 is essential for optimizing the cost and productivity of hot metal. Hence, the intrinsic property of coal is necessary for designing the adequate quality of the coal blend. The coal quality also helps the coke oven plant’s operational efficiency and the coke oven’s health. The quality of coke is significantly influenced by the quality of different categories, viz., primary hard coking coal, hard coking coal, soft coking coal and semi-soft coking coal of individual coals used in the coal blend. The impacts of these coals directly influence coke properties because all coals have an inherent characteristic with different coking potentials in terms of value-in-use. Also, the technological and techno-commercial changes in the metallurgical coal market of today differ from past decades. Likewise, the future metallurgical coal market will vary from today’s market. The technological and techno-commercial change in the metallurgical coal market has varied vastly in the past few decades. Likewise, the future metallurgical coal market will differ from today’s market. Therefore, a process for evaluating the coking potential of metallurgical coal shall be used for appropriate value-in-use to produce quality coke with the optimum cost. The paper describes the significance of the value-in-use of metallurgical coal to evaluate the most economically favourable technique for producing the desired coke quality.","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"66 12","pages":"641 - 658"},"PeriodicalIF":0.4,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140171674","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}

引用次数: 0