Relevant bibliographies by topics / Metallurgical furnaces Combustion

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Academic literature on the topic 'Metallurgical furnaces Combustion'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Metallurgical furnaces Combustion"

1

Akst, N. K., B. S. Fialkov, V. A. Demchenko, and D. T. Kuznetsov. "Monitoring fuel combustion in metallurgical furnaces." Metallurgist 29, no. 8-9 (September 1985): 263–64. http://dx.doi.org/10.1007/bf00737825.

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2

Huang, Wei, Shan Ding, Hua Guang Yan, Li Min Jiang, Tao Yong Li, and Long Zhang. "Application of Double Cross Limit Control on the Combustion Control System of Heating Furnaces." Applied Mechanics and Materials 433-435 (October 2013): 1049–53. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1049.

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Based on a heating furnace in metallurgical industry, this paper discusses the theory of double cross limit combustion control. Its an effective way to get a reasonable air-fuel ratio and prevent the black smoke pollution of the environment. And it also can effectively improve the effect of energy saving and make a good economic benefit for enterprises. The simulation curves show a satisfying effect.
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3

Szymanek, Przemysław, Anna Pajdak, and Arkadiusz Szymanek. "Impact of magnetic fuel activators on the combustion process in metallurgical heating furnaces." Polityka Energetyczna – Energy Policy Journal 22, no. 1 (March 29, 2019): 113–26. http://dx.doi.org/10.33223/epj/103123.

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4

Bukhmirov, V. V., A. V. Sadchikov, A. A. Sadchikov, E. N. Temlyantseva, and E. N. Bushuev. "Burner development for efficient combustion of biogas." Vestnik IGEU, no. 6 (December 28, 2020): 5–13. http://dx.doi.org/10.17588/2072-2672.2020.6.005-013.

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Now in metallurgical production energy resources demand is almost completely satisfied by gaseous fuel. Biogas obtained during organic waste processing is considered as an alternative and cheaper type of fuel. The experience of biogas application has shown that in most modern burners decrease of efficiency and limitation of the range of load regulation is observed. To apply biogas in an industrial environment, it is necessary to develop burners and the methods of its combustion, which provide a high combustion efficiency, as well as a higher energy conversion efficiency. The authors have used the results of gas analysis of biogas obtained in the process of anaerobic decomposition process of organic waste in the reactors of a bioenergy plant. Methods of mathematical statistics with the use of regression analysis of experimental data were used to assess the indicators of the energy efficiency of the gas burner. The possibility of using biogas and landfill gas in the process of roasting, blast-furnace smelting, production of rolled products and steel, as well as heat treatment of metal has been experimentally proven. The properties and composition of biogas at the outlet of the methanogenesis reactor of the bioenergy plant “EcoVoltAgro” are described. A new design of a gas burner is proposed. In this model the efficiency of mixture formation and the completeness of combustion of the flow of a methane-containing gas mixture are significantly increased (up to 32 %) due to the effect of rotation of the perforated pipelines of the gas inlet pipe. On the basis of the results of the full-scale experiment, the optimal values of the gas-air mixture supply rate, the temperature of the supplied air, the volume fraction of methane were determined in order to obtain the largest width of the zone of deviations of the permissible concentrations of carbon dioxide. The use of the designed gas burner provides energy-efficient combustion of biogas in metallurgical furnaces, kilns, and dryers, as well as in any steam and hot water boilers.
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Stryczek, Stanisław, Rafał Wiśniowski, Andrzej Gonet, and Albert Złotkowski. "Influence of Specific Surface of Lignite Fluidal Ashes on Rheological Properties of Sealing Slurries / Wpływ Powierzchni Właściwej Popiołów Fluidalnych z Węgla Brunatnego na Właściwości Reologiczne Zaczynów Uszczelniających." Archives of Mining Sciences 57, no. 2 (November 12, 2012): 313–22. http://dx.doi.org/10.2478/v10267-012-0019-0.

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Abstract New generation fly ashes come from the combustion of coal in fluid-bed furnaces with simultaneous sulphur-removal from gases at ca. 850°C. Accordingly, all produced ashes basically differ in their physicochemical properties from the traditional silica ones. The aim of the laboratory analyses was determining the influence of specific surface and granular composition of fluidal ash on rheological properties of slurries used for sealing up the ground and rock mass media with hole injection methods, geoengineering works and cementing casing pipes in deep boreholes. Fluidal ash from the combustion of lignite contain active Puzzolan appearing in the form of dehydrated clayey minerals and active components activating the process of hydration ashes, i.e. CaO, anhydrite II and CaCO3. The ashes have a weak point, i.e. their high water diment, which the desired rheological properties related with the range of their propagation in the rock mass cannot not be acquired for injection works in the traditional sealing slurries technology. Increasing the water-to-mixture ratio should eliminate this feature of fluidal ashes. Laboratory analyses were performed for slurries based on metallurgical cement CEM III/A 32,5 having water-to-mixture ratios: 0.5; 0.6 ; 0.7 and 0.8; the fluidal ash concentration in the slurries was 30 wt.% (with respect to the mass of dry cement). Basing on the obtained results there were determined optimum recipes of sealing slurries in view of their rheological parameters which could be applied both in drilling technologies (cementing casing pipes, closing of boreholes, plugging) and in geoengineering works related with sealing up and reinforcing ground and rock mass media.
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6

Ovsyannik, A. V. "Carbon Dioxide Turbine Expander Plant Producing Liquid and Gaseous Carbon Dioxide." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 62, no. 1 (February 4, 2019): 77–87. http://dx.doi.org/10.21122/1029-7448-2019-62-1-77-87.

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The scheme of carbon dioxide cogeneration and trigeneration plant with the use of secondary energy resources in the form of combustion products or flue gases that enables to produce electricity, thermal energy and cold for centralized and decentralized supply of consumers simultaneously, is presented. In addition, the plant can produce liquid and gaseous carbon dioxide. The main elements of the plant are a heating unit, a turbodetander unit and a carbon dioxide unit for the production of cold, liquid and gaseous carbon dioxide. A thermodynamic calculation and a brief exergy analysis of the plant were carried out. In the proposed plant, off-gases from glassmelting, metallurgical furnaces, heat power facility and other energy facilities with a secondary energy temperature of 250–400 °C and above can be used as secondary energy resources. The heating unit of the installation has been designed to produce thermal energy for heating and hot water supply systems. The carbon dioxide unit has been designed for the production of cold, electric energy and carbon dioxide in liquid and gaseous form in order to ensure the operation of the plant and the use for commercial purposes. The cold in the plant can be obtained in two evaporators operating at different boiling temperatures. At a higher boiling point of carbon dioxide, cold is used in air conditioning systems and in centralized cooling and storage systems, while at a lower boiling point of carbon dioxide – in freezing and storage systems. For the implementation of the reverse carbon dioxide cycle, a three-stage carbon dioxide compressor with a receiver after the third stage is used. To reduce compression performance of the compressor, complete intermediate cooling of carbon dioxide between stages should be provided.
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Zhang, Xiong, Zhi Wen, Guo Feng Lou, and Nai Shuai Wang. "A Discussion and Economic Analysis of Oxygen-Enriched Combustion Technology in Metallurgic Furnace." Advanced Materials Research 228-229 (April 2011): 351–55. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.351.

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The purpose of this paper is to discuss the application of oxygen-enriched combustion in metallurgic furnaces. Based on the knowledge of combustion and air separation, some advantages of oxygen-enriched combustion are carried on. In this work, the relation between energy efficiency and oxygen enrichment is presented, the result showed that furnaces can reach more than 10% energy saving by properly applying oxygen-enriched combustion technology. A system which combines the oxygen-enriched combustion technology and the CO2 capture with membrane separation technology is evaluated. In this system, the energy cost for CO2 capture can reach 0.9GJ/(t CO2). Finally, some problems that still need further study are also discussed.
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8

Dong, Kai, and Xueliang Wang. "CO2 Utilization in the Ironmaking and Steelmaking Process." Metals 9, no. 3 (February 28, 2019): 273. http://dx.doi.org/10.3390/met9030273.

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Study on the resource utilization of CO2 is important for the reduction of CO2 emissions to cope with global warming and bring a beneficial metallurgical effect. In this paper, research on CO2 utilization in the sintering, blast furnace, converter, secondary refining, continuous casting, and smelting processes of stainless steel in recent years in China is carried out. Based on the foreign and domestic research and application status, the feasibility and metallurgical effects of CO2 utilization in the ferrous metallurgy process are analyzed. New techniques are shown, such as (1) flue gas circulating sintering, (2) blowing CO2 through a blast furnace tuyere and using CO2 as a pulverized coal carrier gas, (3) top and bottom blowing of CO2 in the converter, (4) ladle furnace and electric arc furnace bottom blowing of CO2, (5) CO2 as a continuous casting shielding gas, (6) CO2 for stainless steel smelting, and (7) CO2 circulation combustion. The prospects of CO2 application in the ferrous metallurgy process are widespread, and the quantity of CO2 utilization is expected to be more than 100 kg per ton of steel, although the large-scale industrial utilization of CO2 emissions is just beginning. It will facilitate the progress of metallurgical technology effectively and promote the energy conservation of the metallurgical industry strongly.
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9

Jiang, Juanjuan, Rong Zhu, and Shengtao Qiu. "Effect of CO2 injection into blast furnace tuyeres on the pulverized coal combustion." High Temperature Materials and Processes 40, no. 1 (January 1, 2021): 131–40. http://dx.doi.org/10.1515/htmp-2021-0018.

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Abstract CO2 injection into blast furnace tuyeres is a new technology to utilize CO2, aiming at expanding the way of CO2 self-absorption in the metallurgical industry. The decisive factor of whether CO2 can be mixed into a blast-furnace hot blast and the proper mixing ratio is the effect of CO2 injection on pulverized coal burnout. To investigate the effect of CO2 injection into tuyeres on pulverized coal burnout, a three-dimensional mathematical model of pulverized coal flow and combustion in the lower part of the pulverized coal injection lance-blowpipe-tuyere-raceway was established, and the effect of CO2 injection into tuyeres on pulverized coal combustion rate and outlet temperature is analyzed. The numerical simulation results show that the delay of pulverized coal combustion in the early stage is caused by the endothermic effect of the reaction of CO2 with carbon, and the burnout of pulverized coal is increased in the later stage due to the oxidation of CO2.
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10

Soroka, B. S., and N. V. Vorobyov. "Efficiency of the Use of Humidified Gas Fuel and Oxidizing Mixture." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 62, no. 6 (November 29, 2019): 547–64. http://dx.doi.org/10.21122/1029-7448-2019-62-6-547-564.

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The influence of hydration of the components of combustion (air-oxidizer and – in some cases – fuel) including hydration in the conditions of substitution of natural gas by alternative gas fuels, viz. by coke blast furnace mixture and natural blast furnace mixture – on energy efficiency of the use of different fuels has been determined. Calculations of fuel saving for substitution of natural gas (NG) by wet process gas (blast furnace gas (BFG), coke gas (CG), their mixtures) were performed taking into account real technological parameters (on the example of a specific metallurgical plant). All the calculations were performed within the framework of the author’s methodology on fuel substitution grounded on the 1st and the 2nd laws of thermodynamics. The analysis of possibility for saving or overspending NG is performed in the conditions of preservation of the flow of the used total enthalpy (as the main requirement of the methodology that had been proposed) and of taking into account the corresponding efficiency of fuel use. The calculation of the required heat flow of natural gas combustion depending on the content of wet blast furnace gas in NG + BFG mixtures for the cases of NG substitution by process gases has been carried out. It is established that the presence of moisture in the fuel-oxidation mixture always reduces the efficiency of the combustion chamber or the energy process and the unit. In order to increase the efficiency of a high-temperature furnace (boiler), it is necessary to provide heating of combustion components when utilizing the heat of the outgoing combustion products. It is shown that the efficiency of the fuel-using system can be significantly increased when the potential (excess total enthalpy) of the working fluid (combustion products) is activated. There are additiоnal benefits due to the fact that the existing heat of products of combustion with humid air in a full range of temperatures – from the theoretical combustion temperature to ambient temperature under conditions of equilibrium, including account of the heat of condensation – increases with increasing moisture content of the initial components of combustion, viz. air-oxidizer and/or fuel gas.
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Books on the topic "Metallurgical furnaces Combustion"

1

Gordon, I͡A M. Mekhanika dvizhenii͡a materialov i gazov v shakhtnykh pechakh. Alma-Ata: "Nauka" Kazakhskoĭ SSR, 1989.

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Conference papers on the topic "Metallurgical furnaces Combustion"

1

Zhou, Ping, Chaodong Liu, Aihua Jiang, Wen Chen, and Chi Mei. "Numerical Simulation of Transfer Process in Imperial Smelting Furnace." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68887.

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The mathematical models, which describe the transfer process in Imperial Smelting Furnace (ISF) of Pb-Zn, were established by means of the rules of metallurgical reaction engineering, mass and energy conservation. These models took into account 4 important chemical reactions, heat and mass transfer between gas and solid. The solid particles were treated as porous media when the diffusion of the gas was calculated. The main parameters, such as temperature, the mass of every species, etc, were measured for an operating ISF, and were used as boundary conditions. Based on the Fortran program language, the code to solve the corresponding govern equations was developed, and thermal processes in the furnace were numerically simulated. The results show that the maximum temperature is about 1870K, which is around 1m from the inlet of primary air. The temperature of gas from the top of burden is about 1300K, which is lower than that in the similar furnace. So, it is necessary to take some means to decrease the heat loss from the wall of ISF. A lot of CO exists in the flue gas, which can be used as fuel of boiler or combustion equipment. Based on the mass flow rate and temperature distribution of gas and burden in ISF, the height of five zones, i.e. preheating zone, PbO reduction zone, ZnO reduction zone, coke gasification zone and coke combustion zone, are respectively 2.0m, 0.6m, 3.8m, 4.0m and 2.5m The predicted results by the model are accordant with the measured values in an operating ISF.
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2

Eriksson, Pontus, Steve Walsh, Rolf Gabrielsson, Lars Waldheim, and Fredrik Hermann. "Design and Evaluation of an LCV Combustor for the Volvo VT4400 Industrial Gas Turbine." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30088.

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A combustor has been developed to burn a low calorific gas mixture reflecting a composition typically available from a bio-mass gasification plant. This reference composition contained (by volume) 11,7% H2, 15,4% CO, 5,9% CH4, 13,3% CO2, 46,7% N2 and 7% H2O. The combustor was subsequently tested with gas compositions having varying amounts of NH3, H2O and CO/H2 content. It was also tested with three compositions rich in CO, but lacking H2; these are typically available from blast furnace, or other metallurgical processes. The combustor is designed to be stoichiometric/lean and is suitable for up to 2,1 MW thermal input. The flame tube walls are predominantly effusion-cooled. A natural gas pilot is provided for ignition and operation up to 20% load. UHC emissions were only seen when operating on the reference LCV composition below 40% load. CO emissions were less than 20 ppmv between 40% and 100% load regardless of gas composition tested. Combined thermal and prompt NOX, when operating without ammonia addition, was found to be less than 9 ppmv at full load for the reference gas. When ammonia was introduced to the gas composition the molar ammonia conversion to NOX was approximately 60% for 2500 ppmv NH3 fuel concentration. This was seen to increase to 90% as the ammonia concentration was reduced to 500 ppmv. The combustor showed acceptable temperatures while operating on the reference composition. The compositions having higher net calorific value produced excessive flame tube temperatures. The combustor had excellent combustion stability regardless of gas composition and operating condition.
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Chen, Zhuo, Peng Long, Zhiqiang Sun, Jun Zhou, and Jiemin Zhou. "CFD Simulation and Performance Analysis of CJD Burner for Intensified Flash Smelting Process." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58545.

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The flash smelting process has been widely acknowledged as a successful modern pyro-metallurgical technology because of its good production flexibility. In past decades, great efforts have been put on the equipment improvement in order to achieve a highly intensive and efficient flash smelting process. However, along with the increasing of the productivity and the intensification of the process, technical problems such as the un-smelted materials accumulated in the settler and the dust generation ratio going higher are found occurring more frequently than before. All these problems however indicate degeneration in the performance of the central jet distributor (CJD) burner. A study was then made on the combustion and reaction processes in the flash furnace equipped with a CJD burner. A steady-state turbulent model was developed and a discrete phase model was included to investigate the velocity and temperature changes of both the gaseous and particle phases in the reaction shaft. The deviation of the numerical model is estimated to be less than 6%. The simulation results reveal a serious delay in the ignition of concentrate particles after they are fed into the furnace. Minor modification was also made by CFD computation, attempting to improve the particle ignition speed, but it was found not so effective. The main reason for the decreased smelting efficiency is found to be the poor mixing between the gaseous and particle phases under the intensified condition. These appeal for a great improvement in the performance of the CJD burner.
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