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  • Predicting the Life of Coke Batteries and Planning Their Reconstruction, on the Basis of Technical Inspections
    Coke Chem. Pub Date : 2020-11-27
    P. V. Lipunov, K. G. S. Venkatesan, D. P. Roy, V. Patrice

    Problems arising in coke-battery operation are considered. The equivalent age of coke batteries may be determined by taking account of their technical state and their operating conditions and calculating the starting time for their major repair or complete reconstruction.

    更新日期:2020-11-27
  • Utilization of Excess Dry-Quenching Gas: Operational Experience
    Coke Chem. Pub Date : 2020-11-27
    S. A. Kravchenko, S. Y. Abdullin, A. A. Kachura, O. M. Smirnov

    The operation of two systems for utilizing excess gas in dry-quenching systems is described.

    更新日期:2020-11-27
  • Calorific Value of Coke 6. Increasing the Calorific Value
    Coke Chem. Pub Date : 2020-11-27
    I. V. Miroshnichenko, D. V. Miroshnichenko, I. V. Shulga

    The gross calorific value of coke is largely controllable. It may be increased by optimizing the following factors: the volatile matter from the batch, the ultimate composition of the batch (taking account of oxidation), its granulometric composition, the packing density of the charge in the coking chamber, the temperature in the heating system, the coking rate, the coking period, the final coking

    更新日期:2020-11-27
  • Steam Gasification of Caking Bituminous Coal using Composite Bimetallic Catalyst
    Coke Chem. Pub Date : 2020-11-27
    Zhi-gang Zhao, Zhi-chao Chen, Le-le Xie, Xiao-yong Zhang, Ping Cui

    Abstract The catalytic steam gasification of Yanzhou (YZ) bituminous coal char loading with K2CO3 and CaO was studied in a fixed bed with 20 mm in inner diameter. The influence of K2CO3 on caking properties of Yanzhou bituminous coal was investigated. The relationship between carbon conversion and reaction time and catalyst loading amount of Yanzhou coal char was measured from 700 to 850°C. The effects

    更新日期:2020-11-27
  • Influence of the Heating Rate on the Activation of Coal and Lignite Oxidation by Copper Nitrate
    Coke Chem. Pub Date : 2020-11-27
    K. B. Larionov, I. V. Mishakov, A. V. Zenkov, K. V. Slyusarskiy, A. A. Gromov

    Adding copper nitrate Cu(NO3)2 is known to activate the oxidation of coal and lignite. In the present work, the change in its activating properties with increase in the heating rate is studied. The Cu(NO3)2 is first dissolved in a 50/50 (by volume) mixture of ethyl alcohol and water. Then it is applied to the fuel by steeping, to a content of 5 wt %. Activated oxidation is studied by thermal analysis

    更新日期:2020-11-27
  • Thermooxidative Coking of Poorly Clinkering Coal
    Coke Chem. Pub Date : 2020-11-27
    M. G. Zhumagulov, S. B. Sadykova

    The thermooxidative coking of a coal bed on a moving chain grate (a conveyer) is studied mathematically and experimentally, with a view to the coking of coal unsuited to traditional coke ovens. A model of the temperature field in the coking bed is developed and compared with existing models. The model is verified for a practical coking system. The best values of the basic system characteristics—such

    更新日期:2020-11-27
  • Coke Filler in Synthetic Graphite
    Coke Chem. Pub Date : 2020-11-27
    N. V. Lipkina, V. S. Ostrovskiy

    The crystalline and porous structure of pitch coke, petroleum coke, and shale coke for use as filler in the production of carbon materials is considered. Information is presented regarding the influence of the structure on the properties of the coke and the materials in which it is used as filler. The change in structure and properties of the coke on heat treatment is determined, over a broad temperature

    更新日期:2020-11-27
  • Coal Gasification at Mines by Fast Engineering® Technology
    Coke Chem. Pub Date : 2020-10-26
    D. L. Astanovsky, L. Z. Astanovsky, P. V. Kustov, A. V. Burdanov

    Abstract Traditional coal-processing technology is compared with Fast Engineering® technology developed on the basis of catalytic reactors, heat exchangers, mass-transfer systems, and other innovative equipment. Operational experience is described. The economic, operational, and environmental benefits of the new technology are noted, and means of using the products in gasification are described.

    更新日期:2020-10-30
  • Steeply Inclined Vibrational Screen in Coal Preparation at Coke Plants
    Coke Chem. Pub Date : 2020-10-26
    V. I. Zasel’skiy, D. V. Popolov, G. L. Zaytsev, D. V. Sagalay

    Abstract A steeply inclined vibrational screen may be used to sort coal batch (moisture content 11.2%) with a high content of the ≤3 mm class (70.7%). The influence of the screen’s structural and dynamic parameters on its performance is investigated. On the basis of experiment design, industrial research is undertaken, and the results are statistically analyzed. The efficiency of screening, the clogging

    更新日期:2020-10-30
  • IR Spectroscopy of Sapropelic Coal
    Coke Chem. Pub Date : 2020-10-26
    N. I. Fedorova, V. Yu. Malysheva, Z. R. Ismagilov

    Abstract The kerogen structure of sapropelic coal from various sources is studied by IR spectroscopy. Eight coal samples are chosen. The samples are prepared for analysis by crushing to particle size <0.2 mm and 6-h extraction by the Grefe method using a 1 : 1 alcohol–benzene mixture. High-ash samples are subsequently demineralized by means of concentrated hydrochloric and hydrofluoric acids. The coal

    更新日期:2020-10-30
  • Innovative Coal-Tar Products at PAO Koks
    Coke Chem. Pub Date : 2020-10-26
    A. P. Kozlov, T. G. Cherkasova, S. V. Frolov, S. P. Subbotin, V. S. Solodov

    Abstract Information is presented regarding the output of byproducts at coke plants in Russia and around the world. Traditional approaches to coal-tar processing are discussed. The variation in coal-pitch parameters with change in temperature and isothermal-holding time in coal-tar distillation at PAO Koks is described. Coal tar may be regarded as a potential source of innovative products characterized

    更新日期:2020-10-30
  • Replacement of Coke by Clinkering Coal in Ferroalloy Production outside Russia
    Coke Chem. Pub Date : 2020-10-26
    V. G. Mizin, V. M. Strakhov

    Abstract The composition and properties of clinkering coal (gas coal, lean clinkering coal, and bituminous coal) used at ferroalloy plants in the United States and France are studied. The corresponding technology for the production of silicon ferroalloys is outlined, with some operational results.

    更新日期:2020-10-30
  • Influence of Impurities on Sulfur Removal from Coke-Oven Gas
    Coke Chem. Pub Date : 2020-10-26
    L. P. Bannikov, S. A. Ovchinnikova, V. V. Suprun, S. V. Nesterenko

    Abstract The extraction of hydrogen sulfide from coke-oven gas by means of alkaline aqueous solutions occurs in the presence of several acidic components, which dissolve to form acids with different degrees of dissociation. The relation between the acidic components of the gas depends on the batch composition and the corresponding coking conditions. The ratio H2S/CO2 decreases on coking coal with low

    更新日期:2020-10-30
  • Spectral Classification of Lignite
    Coke Chem. Pub Date : 2020-09-23
    V. I. Butakova, A. I. Kirillova, V. K. Popov

    Abstract—Lignite is classified in terms of its diffuse reflectance IR spectrum, by soft independent modeling of class analogy (SIMCA).

    更新日期:2020-09-24
  • Influence of Fresh Oil on the Performance of Circulating Absorbent Oil in Benzene Processing
    Coke Chem. Pub Date : 2020-09-23
    S. V. Fatenko

    Abstract—In changing the composition of coking batch, it is expedient also to ensure effective operation of the benzene department, both in terms of the production of commercial phenolic hydrocarbons and in order to maintain normal operation of the coke batteries’ heating system. In assessing the fresh absorbent oil used to replenish the circulating oil, not only its operational characteristics must

    更新日期:2020-09-24
  • Improving the Dry Quenching of Coke
    Coke Chem. Pub Date : 2020-09-23
    R. R. Gilyazetdinov, K. V. Slepov, I. Yu. Sukhov

    Abstract—Means of more efficient dry quenching of coke are considered. The interaction of the coke with the circulating gas is described. The influence of this interaction on the quality of coke and its losses is studied. The refitting of the dry-quenching system at AO EVRAZ NTMK is outlined.

    更新日期:2020-09-24
  • Innovations in World Cokemaking Technologies: A Report on the ESTAD 2019 Steel Conference
    Coke Chem. Pub Date : 2020-09-23
    V. I. Rudyka, S. A. Kravchenko, M. A. Solovjov, V. P. Malyna

    Abstract—New developments in coke production are reviewed on the basis of papers presented at ESTAD 2019. Examples of new designs for coke batteries and ancillary equipment are presented, noting improvements in performance.

    更新日期:2020-09-24
  • Change in Properties of Roadmaking Bitumen on Oxidation
    Coke Chem. Pub Date : 2020-09-23
    V. V. Vasilyev, E. V. Salamatova, N. V. Maidanova, M. V. Kalinin, V. M. Strakhov

    Abstract—IR spectroscopy is used to assess the ease and depth of oxidation of roadmaking bitumen on the basis of the relative integral optical density of the carbonyl group’s absorption band during RTFOT and PAV tests. For different samples, the ease of short-term oxidation (the short-term oxidizability) of bitumen differs by an order of magnitude, while the difference in the long-term oxidizability

    更新日期:2020-09-24
  • Better Use of Enriched UK Mezhegeyugol Coal in Coking Batch
    Coke Chem. Pub Date : 2020-09-23
    Yu. A. Zolotukhin, N. S. Andreychikov, N. A. Berkutov, S. N. Kupriyanova

    Abstract—Industrial coking data from Kuznetsk and Raspadsk concentrates consisting of coal from OOO UK Mezhegeyugol are analyzed to determine the strength M25 and M10 and the ratio CSR/CRI for the coke produced from such batch at AO EVRAZ NTMK. Preliminary limits are established on the optimal content of UK Mezhegeyugol coal in the coking batch. On the basis of industrial experiments, the optimal batch

    更新日期:2020-09-24
  • Effect of Microlithotype Maceral Distribution on Coke Quality
    Coke Chem. Pub Date : 2020-09-23
    B. Ghosh, B. K. Sahoo, P. K. Jha, K. K. Manjhi, J. N. Sahu, A. K. Varma

    Abstract— The coking behavior of coal is an important facet in utilization of coal in metallurgy and in other industries. The carbonization behavior of coal mainly depends on coal rank, petrographic composition, ultimate composition and rheology of coal. Coal petrography has become very useful technique for establishment between formulation of coal blend composition and coke quality prediction. It

    更新日期:2020-09-24
  • Coke Quality and the Prospects for Coking with Proprietary Coal Concentrates at AO EVRAZ NTMK
    Coke Chem. Pub Date : 2020-09-23
    N. A. Berkutov, A. V. Rozhnev, V. N. Kruglov, S. N. Kupriyanov, A. V. Savchenko, O. E. Mikheeva

    Abstract—The main suppliers of coal for coke production at AO EVRAZ NTMK are considered, along with the technological value of each concentrate in systems with wet and dry quenching. Alternative suppliers may be identified by ranking the concentrates. Laboratory and industrial coking reveals the influence of the coal concentrates on the quality of metallurgical coke. On that basis, their ideal content

    更新日期:2020-09-24
  • Determining the Vitrinite Reflectance of Coal from Its Fuel Ratio
    Coke Chem. Pub Date : 2020-08-30
    N. I. Fedorova; Z. R. Ismagilov

    AbstractThe use of an empirical equation to calculate the vitrinite reflectance of coal from the fuel ratio Fr is considered. The fuel ratio is based on the fixed coal content (Cfixed = 100 – Ad – Vd) and the yield of volatiles (Vd). We investigate ten samples of bituminous coking coal (Zh coal) used as the clinkering component in the coking batch. Technical and elemental analysis indicates that the

    更新日期:2020-08-30
  • Refining of Coal Tar by Hydrogenation in the Presence of Nanoheterogeneous Nickel Sulfide Catalyst
    Coke Chem. Pub Date : 2020-08-30
    A. S. Maloletnev; Zh. K. Kairbekov; N. T. Smagulova

    AbstractThe refining of coal tar by hydrogenation is considered. In this process, nanoheterogeneous Ni-based catalysts may expediently be produced in situ from precursors in the reaction medium. The yield of needle coke in complete coal processing with recirculation of the residue at the coking stage is found to be 50–55%. That is 1.5 times the industrial yield in the coking of pitch.

    更新日期:2020-08-30
  • Decreasing the NO x Emissions at Coke Plants
    Coke Chem. Pub Date : 2020-08-30
    V. I. Rudyka; S. A. Kravchenko; S. J. Abdullin; S. J. Stelmachenko; O. I. Makei

    AbstractVarious approaches to decreasing toxic emissions of nitrogen oxides at coke plants are described: stepwise air supply; recirculation of smokestack gases; and selective catalytic and noncatalytic reduction of the nitrogen oxides.

    更新日期:2020-08-30
  • Assessment of the Likelihood of Underground Coal Oxidation and Self-Ignition: A Review
    Coke Chem. Pub Date : 2020-08-30
    S. A. Semenova; Yu. F. Patrakov; A. E. Majorov

    AbstractStandard and alternative methods of assessing the likelihood of coal oxidation and self-ignition in the bed are analyzed. These methods are based on the change in the petrographic, physicomechanical, chemical, and thermal properties of the coal on oxidation. Most of the methods are unsuitable for identification of the initial stage of coal oxidation. The onset of self-heating may be better

    更新日期:2020-08-30
  • Improving the Flotation of Fine Coal Slurries
    Coke Chem. Pub Date : 2020-08-30
    V. N. Petukhov; N. Yu. Svechnikova; O. V. Kuklina; S. V. Yudina

    AbstractThe properties of fine coal slurries at OOO MMK-Ugol and their flotation are studied. To improve the flotation of finely disperse coal slurries, more effective reagent combinations are employed; TPA collection agent and Sinterol flocculant are considered. In the laboratory, optimal flotation conditions are developed for fine coal slurries. In these conditions, coal enrichment is more efficient

    更新日期:2020-08-30
  • Structural Comparison of Metallurgical Coke and Coke Used in Electric Furnaces for Alloy Production
    Coke Chem. Pub Date : 2020-08-30
    G. A. Ulyeva

    AbstractThe microstructure of solid carbon-based reducing agents is assessed by electron microscopy. On the basis of the results, the mean size of pores, cracks, and pore walls in the reducing agents is determined. The structure formation of the special cokes is analyzed in relation to the raw materials and production technology employed. On that basis, their suitability for metal and alloy production

    更新日期:2020-08-30
  • Properties of Coal of Moderate Metamorphic Development
    Coke Chem. Pub Date : 2020-07-27
    E. N. Kozyreva

    AbstractThe physicochemical properties of Kuznetsk Basin coal are studied. The following distinctive features are confirmed for coal of moderate metamorphic development: minimum strength and gas-dynamic potential; and maximum risk of cracking and explosion, as well as maximum instability of the coal–methane system. For bed samples of different rank, we find that the petrographic characteristics of

    更新日期:2020-07-27
  • Coking Products from Shale
    Coke Chem. Pub Date : 2020-07-27
    A. S. Lavrova; V. V. Vasilyev; N. N. Ostroukhov; N. I. Petrovich; V. M. Strakhov; V. A. Itskovich

    AbstractThe composition of distillates from shale resins produced by the semicoking of kukersite shale in a Kiviter gas generator is investigated by chromatography and mass spectrometry. It is enlightening to compare the coking products from the complete shale resins, light fuel-oil distillate, heavy fuel-oil distillate, and shale phenol fractions. The shale coke samples are investigated by electron

    更新日期:2020-07-27
  • Replacement of Graphite by Petroleum Coke in Rail Lubricants
    Coke Chem. Pub Date : 2020-07-27
    V. E. Gozbenko; N. A. Korchevin; S. K. Kargapoltsev; V. M. Strakhov; A. I. Karlina; Yu. I. Karlina

    AbstractThe replacement of graphite by petroleum coke in lubricants for railroad lines is considered. The lubricant consists of petroleum coke, spent diesel oil, and low-molecular polyethylene. On mixing, these components form a system that is stable on storage. The particle size of the petroleum coke is selected so as to minimize wear of the metal. The hydrocarbons employed are biodegradable; that

    更新日期:2020-07-27
  • Evaluation of the Physical-Chemical Properties and Thermal Treatment of Coking
    Coke Chem. Pub Date : 2020-07-27
    K. El Korchi; R. Alami; A. Chaouch

    AbstractCoking is obtained from the Moroccan refinery, which has mainly experienced a serious problem of the coking formation inside packed beds columns. The calcined petroleum coke properties need to meet the specifications for aluminum anode-grade coke. The aim of the present paper is to evaluate the physical-chemical characteristics of coking formed inside petrochemical distillation columns before

    更新日期:2020-07-27
  • Coke Oven for Tests of Loose and Tamped Coal Batch
    Coke Chem. Pub Date : 2020-07-27
    S. A. Kravchenko; S. J. Abdullin; O. G. Kolesnykov

    AbstractThe influence of the composition and preparation of the coal batch on the expansion pressure is a neglected aspect of coke production. A research coke oven is proposed for establishing the optimal composition of tamped and loose batch and determining the expansion pressure. This coke oven yields values of the expansion pressure for both loose batch and tamped batch.

    更新日期:2020-07-27
  • Sorptional Equilibrium of Gas-Bearing Coal in Sealed Vessels: Thermal Processes
    Coke Chem. Pub Date : 2020-07-27
    G. Ya. Polevshchikov; E. N. Kozyreva; V. A. Bobin

    AbstractThermodynamic processes in a closed volume filled with gas-bearing Zh coal are investigated. Experiments are conducted with bed samples in a sealed vessel, which is equipped with a pressure sensor and four temperature sensors. The temperature variation in the vessel is found to be oscillatory. This may be attributed to heat transfer between layers with different granulometric composition and

    更新日期:2020-07-27
  • Hydraulic Analysis of Coke Ovens
    Coke Chem. Pub Date : 2020-07-27
    D. G. Zublev; V. D. Barsky

    AbstractCorrect hydraulic parameters are required for safe long-term operation of coke batteries. Maintaining positive pressure in the ovens throughout coking preserves the lining of the coke oven, because air leakage into the chamber is prevented. The chronological development of concepts regarding coke-oven hydrodynamics is reviewed and, on that basis, low pressure in the coke ovens is shown to appear

    更新日期:2020-07-27
  • Calorific Value of Coke 5. Quenching Method
    Coke Chem. Pub Date : 2020-07-27
    I. V. Miroshnichenko; D. V. Miroshnichenko; I. V. Shulga; Y. S. Balaeva

    AbstractThe maximum gross calorific value of coke corresponds to the >25 mm size class and the minimum value to the <10 mm class, regardless of the quenching method. Dry quenching increases both the gross and net calorific value of the coke in comparison with wet quenching. If the content of gas-group coal in the batch is decreased, the gross calorific value of the coke is increased. For dry quenched

    更新日期:2020-07-27
  • Adjusting the Primary Cooling of Coke-Oven Gas for Batch with Elevated Gas-Coal Content
    Coke Chem. Pub Date : 2020-07-27
    S. V. Fatenko; S. Y. Faenko; L. P. Bannikov; S. V. Nesterenko; D. V. Miroshnichenko

    AbstractIndustrial experiments show that it is expedient to treat the recirculation loop in primary gas-cooling units with a corrosion and scale inhibitor based on zinc, phosphonate, and polymer dispersants, so as to eliminate salt deposits on the equipment surfaces and to prevent the solution of the heat-transfer surfaces. The effectiveness of such treatment is confirmed by calculating the quantity

    更新日期:2020-07-27
  • Computer-Aided Design of Optimally Organized Systems in the Chemical Industry
    Coke Chem. Pub Date : 2020-07-27
    V. A. Naletov; M. B. Glebov

    AbstractA new approach is proposed to the computer-aided design of optimally organized systems in chemical production. This approach is based on information theory, which is an applied aspect of general systems theory. A general methodology for the creation of complex technological objects is employed, in accordance with Roullier’s evolutionary law of increasing system complexity (system organization)

    更新日期:2020-07-27
  • Erratum to: FTIR and Raman Spectroscopy Characterization of Coking Coals with Diverse Coalification
    Coke Chem. Pub Date : 2020-07-07
    Shao-Jing Yang, Qing Hai Pang, Tai-Xu Xu, Zhi-Jun He, Teng-Fei Song, Jun-Hong Zhang

    erratum

    更新日期:2020-07-07
  • New Technical Solutions for the Automation of Technological Processes of Coke Oven Plant Facilities
    Coke Chem. Pub Date : 2020-07-07
    K. G. Lavrov; B. I. Beshenchev; D. A. Kharlov; M. A. Gorenbukh; K. V. Osipovych; A. S. Tsikhotsky

    Abstract—Designs are proposed for use in the automatic quenching of coke hot spots on conveyers and in automatic loading of fine coke in railroad cars.

    更新日期:2020-07-07
  • Sorption of Metal Cations by Lignite and Humic Acids
    Coke Chem. Pub Date : 2020-07-07
    S. I. Zherebtsov; N. V. Malyshenko; K. S. Votolin; Z. R. Ismagilov

    Abstract—The possibility of using readily available materials—Tyul’gansk lignite, Tisul’sk lignite (and its naturally oxidized form), humic acids, and coal residues after humic-acid extraction—in the sorption of copper, cobalt, manganese, and zinc cations from aqueous solutions is considered. Their effectiveness as sorbents is assessed by means of IR Fourier spectroscopy, ESR, Raman scattering, and

    更新日期:2020-07-07
  • Calorific Value of Coke. 4. Size Distribution
    Coke Chem. Pub Date : 2020-07-07
    I. V. Miroshnichenko; D. V. Miroshnichenko; I. V. Shulga; Y. S. Balaeva; A. V. Tsygankov

    Abstract—The gross calorific value of wet-quenched blast-furnace coke fluctuates significantly as a function of the piece size. It is greatest for the <25 mm size class: 33.0 MJ/kg or more. The degree of conditioning of the coke, assessed in terms of the volatile matter and its actual density, has considerable influence on the gross calorific value. The less conditioned blast-furnace coke obtained

    更新日期:2020-07-07
  • Ash Composition in the Combustion of Promising Slurry Fuels
    Coke Chem. Pub Date : 2020-07-07
    G. S. Nyashina; M. A. Kurgankina; M. R. Akhmetshin; V. V. Medvedev

    Abstract—Of all the traditional energy sources (coal, natural gas, fuel oil, and petroleum), coal has the greatest environmental impact. Coal combustion at thermal power plants produces copious atmospheric emissions, as well as ash and slag. The discovery of new fuels is a high priority at present. One possibility is the use of industrial wastes. Composite liquid fuels could permit the use of coal-mining

    更新日期:2020-07-07
  • Packing Density of Coal in Open Storage at AO Ural Steel
    Coke Chem. Pub Date : 2020-07-07
    A. Ya. Eremin; M. V. Zorin; S. P. Zubov; S. G. Tober; E. V. Selin; E. A. Gribanov

    Abstract—A method of determining the packing density of coal concentrates in open storage is proposed and tested at AO Ural Steel. The variation in packing density over the height and length of the coal stack is determined. A protocol is developed for determining the packing density of coal concentrates in open storage.

    更新日期:2020-07-07
  • Maximizing Benzene Extraction in Coke Production by Automatic Control
    Coke Chem. Pub Date : 2020-07-07
    B. N. Parsunkin; S. M. Andreev; A. R. Bondareva; I. I. Vasilev

    Abstract—It is established that optimizing extremal control of benzene distillation is expedient so as to maximize its extraction from absorbing oil. An effective method is described for finding the maximum possible benzene extraction, with appropriate regulation of the steam supply to the distillation column so as to permit dynamic temperature control. Simulation of the search process verifies the

    更新日期:2020-07-07
  • Influence of Cu(NO 3 ) 2 Activator and Gas Composition on the Thermal Decomposition of Coal and Lignite
    Coke Chem. Pub Date : 2020-07-07
    K. B. Larionov; I. V. Mishakov; K. V. Slyusarskiy; S. V. Lavrinenko; A. A. Gromov; A. A. Vedyagin

    AbstractThe thermal transformation of coal and lignite in the presence of Cu(NO3)2 activator (5 wt %) is investigated as a function of the atmospheric composition. The copper nitrate is supported on to the samples by the incipient wetness with Cu(NO3)2 solution in water and alcohol. The effect of the activator is studied as a function of the gas (air/argon) composition, by thermogravimetric analysis

    更新日期:2020-07-07
  • Tests of Sinterol Reagent in Flotation at OOO MMK-Ugol
    Coke Chem. Pub Date : 2020-07-07
    V. N. Petukhov; A. N. Smirnov; N. Yu. Svechnikova; A. P. Shulga; V. G. Dundukov

    AbstractThe flotation conditions for coal with different mineral content of the organic component are studied in the laboratory. The reagent protocol developed, which includes Sinterol modifier, is industrially tested. The results indicate that, if Sinterol is added at a rate of (1.0–3.0) ×10–3 kg/t of coal fines, the extraction of the coal’s combustible mass in the concentrate is increased; the process

    更新日期:2020-07-07
  • Express Method of Determining the Softening Point of Petroleum Pitch
    Coke Chem. Pub Date : 2020-06-03
    P. V. Kugatov; A. E. Raznoushkin; B. S. Zhirnov; A. E. Eremenko; D. S. Dryndina

    AbstractA capillary method is proposed for determining the softening point of petroleum pitch. A pitch sample is heated in a glass capillary by an air flux and observed under a microscope. The softening point is measured at the instant when the pitch within the capillary shrinks and pulls away from the glass walls. The method is tested for two series of petroleum pitch samples: one is derived from

    更新日期:2020-06-03
  • Influence of Gas Microbubbles on the Wettability of Coal Surfaces
    Coke Chem. Pub Date : 2020-06-03
    Yu. F. Patrakov; S. A. Semenova; T. A. Papina

    AbstractUsing low-ash OS coal as a model, a method is developed for creating a hydrophobic coal surface by means of microbubbles in a gas–liquid suspension. Air microbubbles are generated by decompression. The influence of the pressure in the gas saturation of water on the size and stability of the microbubbles is established. It is shown that, in the presence of microbubbles, a hydrophobic air layer

    更新日期:2020-06-03
  • Granulation of Coal Pitch at OAO Altai-Koks
    Coke Chem. Pub Date : 2020-06-03
    M. A. Solov’ev; N. Yu. Chebotarev; E. I. Kudryavtsev; N. I. Manekina; A. V. Obyshchak

    AbstractThe construction and operation of granulation systems for coal pitch at OAO Altai-Koks is considered. Such systems improve the storage and transportation of coal pitch.

    更新日期:2020-06-03
  • X-Ray Structural Analysis of Vitrinites in Coal at Different Metamorphic Stages
    Coke Chem. Pub Date : 2020-06-03
    A. N. Popova; N. I. Fedorova; Z. R. Ismagilov

    AbstractBy X-ray structural analysis, the following structural parameters of vitrinite concentrates from coal of different metamorphic stages are determined: the number of carbon atoms in each lamella (nC), the width of the lamellas (La), their stacking height (Lc), the number of polyaromatic layers in each stack (N), and the packing density of the lamellas (ρ). Later metamorphic stages are associated

    更新日期:2020-06-03
  • Production of Lithium Hydroxide and Lithium Carbonate from Spent Lithium Batteries
    Coke Chem. Pub Date : 2020-06-03
    V. I. Nazarov; A. M. Gonopolsky; D. A. Makarenkov; M. I. Klyushenkova; A. P. Popov

    AbstractA disposal technology for lithium batteries with minimal environmental impact is proposed. Ground battery components are processed in five stages, to produce mechanically activated powder. Attention focuses on two stages: leaching; and purification and concentration of the lithium hydroxide and carbonate in a high-pressure membrane unit. Theoretical principles are outlined for mechanical–chemical

    更新日期:2020-06-03
  • Corrosion Resistance of New Duplex Stainless Steels in Coke Production
    Coke Chem. Pub Date : 2020-06-03
    S. V. Nesterenko

    AbstractThe corrosion resistance of SAF 2507 duplex stainless steel and 254 SMO superaustenitic steel is studied in aggressive sulfuric-acid solutions (mother liquor) from sulfate departments; in aggressive media from arsenic–soda desulfurization; and in coke-shop media (from the quenching car and quenching tower). Gravimetric tests are conducted in accordance with State Standard GOST 9.908–85. The

    更新日期:2020-06-03
  • Effects of Different Experimental Conditions on the Micropore Characteristics of Coal
    Coke Chem. Pub Date : 2020-06-03
    Huan Cheng; Yinghua Liang; Yijun Zeng; Shiyong Chao; Yi Gu; Dewen Kong

    AbstractLow-temperature nitrogen adsorption experiment is widely used to analysis the micropore characteristics of coal. Effects of different experimental conditions including degassing time, degassing temperature, sample weight and sample particle size on the micropore characteristics of a middle rank coking coal produced in Shanxi Province, China was investigated to confirm the optimum experimental

    更新日期:2020-06-03
  • Applications of Gas Coal: A Review
    Coke Chem. Pub Date : 2020-06-03
    S. V. Fatenko; D. V. Miroshnichenko; I. V. Shulga

    AbstractAs in most countries, the applications of coal in Ukraine do not match its availability: the reserves consist mainly of coal of poor metamorphic development, which is in limited demand. The use of gas coal in coke production is largely associated with new coal-preparation and coking technologies: in particular, molded coke, heat treatment, and stamp charging. Gas coal is preferred for gasification

    更新日期:2020-06-03
  • Microbubble Modification of Coal Surfaces before Flotation
    Coke Chem. Pub Date : 2020-04-27
    Yu. F. Patrakov; S. A. Semenova; Yu. A. Kharlampenkova

    AbstractThe flotation of coking coal after treatment of the coal pulp by microbubbles is investigated. Differential granulometric analysis indicates that, when using air microbubbles, the flotation of small coal particles (<50 μm) predominates. The effectiveness of flotation of small coal fractions (<0.1 mm) by microbubbles, without reagent, is comparable with that attained when using traditional apolar

    更新日期:2020-04-27
  • Gas Liberation in the High-Temperature Isothermal Holding of Coke Residues
    Coke Chem. Pub Date : 2020-04-27
    S. G. Stakheev; A. Ya. Eremin; E. G. Zolotareva

    AbstractThe dynamics of nitrogen, hydrogen, and carbon-monoxide liberation in the isothermal holding of coke residues from G, Zh, KO, KS, and T coal at 1000°C is studied in experiments after heating at 10°C/min. The gas liberation in isothermal holding continues throughout the experiment (2 h). The rate of gas liberation declines exponentially in the course of holding. The rates of H2 and CO emission

    更新日期:2020-04-27
  • Prediction and Control of Coke Plant Wastewater Quality using Machine Learning Techniques
    Coke Chem. Pub Date : 2020-04-27
    Himanshu Khandelwal; Shweta Shrivastava; Adity Ganguly; Abhijit Roy

    AbstractThe present study focuses on examining the fate of coal constituents—carbon, sulphur, nitrogen and chlorine from coal blend to coke oven wastewater. Further, the impact of coal constituents and coke making process on wastewater quality has studied and analyzed the effects with plant data. Understanding helps in development of coke oven wastewater quality prediction model using machine learning

    更新日期:2020-04-27
  • Change in Molecular Mass of Pitch on Thermodestructive Polycondensation of Heavy Pyrolysis Tar
    Coke Chem. Pub Date : 2020-04-27
    A. A. Mukhamedzianova; I. A. Ikhsanov; N. Yu. Beilina

    AbstractBy determining the molecular mass of pitch from heavy pirolysis tar, additional information may be obtained regarding the thermal polycondensation and quality of pitch. The weighted mean molecular mass of toluene-soluble components of the pirolysis pitch is determined by gel-permeation chromatography. The molecular mass of the components in specific petroleum-pitch fractions is studied as a

    更新日期:2020-04-27
  • Quality and Utility of Shubarkol Shale from Kazakhstan
    Coke Chem. Pub Date : 2020-04-27
    V. M. Strakhov

    AbstractThe quality of Shubarkol carbonaceous shale from Kazakhstan is studied by state-of-the-art methods, with particular attention to its composition, its mineral composition, and its chemical, petrographic, physicochemical, and thermomechanical properties. According to one industrial classification, the shale is of humic–sapropelic type in genetic terms; it consists primarily of sorbomixtinite

    更新日期:2020-04-27
  • An Informational Systems Approach to Optimal Organization of Complex Technological Processes
    Coke Chem. Pub Date : 2020-04-27
    V. A. Naletov; M. B. Glebov

    AbstractThe basic principles of an information-based systems approach to optimal organization of complex industrial processes with a hierarchical structure are outlined, for the example of systems in chemical technology. General laws of the development of living things can be employed. In particular, Roullier’s evolutionary law of growing system complexity in the organization of organisms is applied

    更新日期:2020-04-27
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