The Experts below are selected from a list of 1974 Experts worldwide ranked by ideXlab platform

Henrik Saxén - One of the best experts on this subject based on the ideXlab platform.

  • Sustainable development of primary steelmaking under novel Blast Furnace Operation and injection of different reducing agents
    Chemical Engineering Science, 2015
    Co-Authors: Hamid Ghanbari, Frank Pettersson, Henrik Saxén
    Abstract:

    Abstract This paper presents a numerical study of economics and environmental impact of an integrated steelmaking plant, using surrogate, empirical and shortcut models based on mass and energy balance equations for the unit Operations. In addition to the steelmaking processes, chemical processes such as pressure/temperature swing adsorption, membrane, chemical absorption technologies are included for gas treatment. A methanol plant integrated with a combined heat and power plant forms a polygeneration system that utilizes energy and gases of the site. The overall model has been applied using mathematical programming to find an optimal design and Operation of the integrated plant for an economic objective under several development stages of the technology. New concepts studied are Blast Furnace Operation with different degrees of top gas recycling and oxygen enrichment of the Blast to full oxygen Blast Furnace. Coke in the process may be partially replaced with other carbon carriers. The system is optimized by maximizing the net present value, which includes investment costs for the new unit processes as well as costs of feed materials, CO2 emission and sequestration, Operation costs and credit for products produced. The effect of using different fuels such as oil, natural gas, pulverized coal, coke oven gas, charcoal and biomass is studied, particularly focusing on biomass torrefaction and the effect of integration on arising reductant in steelmaking to reduce emissions from the system. The effects of steel plant capacity on the optimal choice of carbon carriers are also studied. It is demonstrated that it is possible to decrease the specific CO2 emissions of primary steelmaking from fossil fuels from 1.6 t of CO2 to a level of 0.75–1.0 t and further by more than 50% through the integration of biofuels in considered scenarios.

  • Optimization Study of Steelmaking under Novel Blast Furnace Operation Combined with Methanol Production
    Industrial & Engineering Chemistry Research, 2011
    Co-Authors: Hamid Ghanbari, Mikko Helle, Frank Pettersson, Henrik Saxén
    Abstract:

    The opportunities to improve the performance of an existing production concept by plant retrofit are largely dependent on the available knowledge of the best Operational state of the plant and its parameters and conditions. In this paper, nonlinear programming was used to analyze the economic potential of the use of large volumes of gases in a steel plant to produce methanol as a valuable byproduct in steelmaking. Conventional Blast Furnace Operation was compared with the option of operating the Blast Furnace with top gas recycling after carbon dioxide stripping. The optimal integration of the processes was investigated by minimizing the cost of liquid steel production, considering the cost of raw materials and fuels, CO 2 emission, and stripping, as well as credits for power, district heat, and methanol production. It was found that the novel way of operating the Blast Furnace with cold oxygen blowing and top gas recycling was well suited for combination with a polygeneration system using the residual gases of the steel plant.

Hamid Ghanbari - One of the best experts on this subject based on the ideXlab platform.

  • Sustainable development of primary steelmaking under novel Blast Furnace Operation and injection of different reducing agents
    Chemical Engineering Science, 2015
    Co-Authors: Hamid Ghanbari, Frank Pettersson, Henrik Saxén
    Abstract:

    Abstract This paper presents a numerical study of economics and environmental impact of an integrated steelmaking plant, using surrogate, empirical and shortcut models based on mass and energy balance equations for the unit Operations. In addition to the steelmaking processes, chemical processes such as pressure/temperature swing adsorption, membrane, chemical absorption technologies are included for gas treatment. A methanol plant integrated with a combined heat and power plant forms a polygeneration system that utilizes energy and gases of the site. The overall model has been applied using mathematical programming to find an optimal design and Operation of the integrated plant for an economic objective under several development stages of the technology. New concepts studied are Blast Furnace Operation with different degrees of top gas recycling and oxygen enrichment of the Blast to full oxygen Blast Furnace. Coke in the process may be partially replaced with other carbon carriers. The system is optimized by maximizing the net present value, which includes investment costs for the new unit processes as well as costs of feed materials, CO2 emission and sequestration, Operation costs and credit for products produced. The effect of using different fuels such as oil, natural gas, pulverized coal, coke oven gas, charcoal and biomass is studied, particularly focusing on biomass torrefaction and the effect of integration on arising reductant in steelmaking to reduce emissions from the system. The effects of steel plant capacity on the optimal choice of carbon carriers are also studied. It is demonstrated that it is possible to decrease the specific CO2 emissions of primary steelmaking from fossil fuels from 1.6 t of CO2 to a level of 0.75–1.0 t and further by more than 50% through the integration of biofuels in considered scenarios.

  • Optimization Study of Steelmaking under Novel Blast Furnace Operation Combined with Methanol Production
    Industrial & Engineering Chemistry Research, 2011
    Co-Authors: Hamid Ghanbari, Mikko Helle, Frank Pettersson, Henrik Saxén
    Abstract:

    The opportunities to improve the performance of an existing production concept by plant retrofit are largely dependent on the available knowledge of the best Operational state of the plant and its parameters and conditions. In this paper, nonlinear programming was used to analyze the economic potential of the use of large volumes of gases in a steel plant to produce methanol as a valuable byproduct in steelmaking. Conventional Blast Furnace Operation was compared with the option of operating the Blast Furnace with top gas recycling after carbon dioxide stripping. The optimal integration of the processes was investigated by minimizing the cost of liquid steel production, considering the cost of raw materials and fuels, CO 2 emission, and stripping, as well as credits for power, district heat, and methanol production. It was found that the novel way of operating the Blast Furnace with cold oxygen blowing and top gas recycling was well suited for combination with a polygeneration system using the residual gases of the steel plant.

Frank Pettersson - One of the best experts on this subject based on the ideXlab platform.

  • Sustainable development of primary steelmaking under novel Blast Furnace Operation and injection of different reducing agents
    Chemical Engineering Science, 2015
    Co-Authors: Hamid Ghanbari, Frank Pettersson, Henrik Saxén
    Abstract:

    Abstract This paper presents a numerical study of economics and environmental impact of an integrated steelmaking plant, using surrogate, empirical and shortcut models based on mass and energy balance equations for the unit Operations. In addition to the steelmaking processes, chemical processes such as pressure/temperature swing adsorption, membrane, chemical absorption technologies are included for gas treatment. A methanol plant integrated with a combined heat and power plant forms a polygeneration system that utilizes energy and gases of the site. The overall model has been applied using mathematical programming to find an optimal design and Operation of the integrated plant for an economic objective under several development stages of the technology. New concepts studied are Blast Furnace Operation with different degrees of top gas recycling and oxygen enrichment of the Blast to full oxygen Blast Furnace. Coke in the process may be partially replaced with other carbon carriers. The system is optimized by maximizing the net present value, which includes investment costs for the new unit processes as well as costs of feed materials, CO2 emission and sequestration, Operation costs and credit for products produced. The effect of using different fuels such as oil, natural gas, pulverized coal, coke oven gas, charcoal and biomass is studied, particularly focusing on biomass torrefaction and the effect of integration on arising reductant in steelmaking to reduce emissions from the system. The effects of steel plant capacity on the optimal choice of carbon carriers are also studied. It is demonstrated that it is possible to decrease the specific CO2 emissions of primary steelmaking from fossil fuels from 1.6 t of CO2 to a level of 0.75–1.0 t and further by more than 50% through the integration of biofuels in considered scenarios.

  • Optimization Study of Steelmaking under Novel Blast Furnace Operation Combined with Methanol Production
    Industrial & Engineering Chemistry Research, 2011
    Co-Authors: Hamid Ghanbari, Mikko Helle, Frank Pettersson, Henrik Saxén
    Abstract:

    The opportunities to improve the performance of an existing production concept by plant retrofit are largely dependent on the available knowledge of the best Operational state of the plant and its parameters and conditions. In this paper, nonlinear programming was used to analyze the economic potential of the use of large volumes of gases in a steel plant to produce methanol as a valuable byproduct in steelmaking. Conventional Blast Furnace Operation was compared with the option of operating the Blast Furnace with top gas recycling after carbon dioxide stripping. The optimal integration of the processes was investigated by minimizing the cost of liquid steel production, considering the cost of raw materials and fuels, CO 2 emission, and stripping, as well as credits for power, district heat, and methanol production. It was found that the novel way of operating the Blast Furnace with cold oxygen blowing and top gas recycling was well suited for combination with a polygeneration system using the residual gases of the steel plant.

V. P. Lyalyuk - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Coke Quality on the Efficiency in Blast Furnaces of Different Size
    Coke and Chemistry, 2018
    Co-Authors: D. A. Muchnik, V. P. Lyalyuk, D. A. Kassim, A. I. Trikilo, I. A. Lyakhova
    Abstract:

    The influence of the coke strength M _25 and abradability M _10 and the proportion of >80 mm coke pieces on the Furnace productivity and coke consumption is analyzed on the basis of mean monthly Operational data for 2000-, 2700-, and 5000-m^3 Blast Furnaces. The influence of these coke parameters on Blast-Furnace Operation is more pronounced for larger Furnaces.

  • Blast-Furnace Operation with wet Blast
    Steel in Translation, 2017
    Co-Authors: V. P. Lyalyuk, A. K. Tarakanov, D. A. Kassim, G. P. Kostenko, E. E. Donskov
    Abstract:

    Traditional wetting of the Blast by steam does not ensure constant moisture content. The abrupt changes in moisture content undermine the stability of the lining and the metal framework of the air heaters. A method of moisture supply that eliminates condensation in the cold-Blast line is required.

  • Blast-Furnace Operation with pulverized-coal injection and with chunk anthracite
    Steel in Translation, 2017
    Co-Authors: V. P. Lyalyuk, A. K. Tarakanov, D. A. Kassim, P. I. Otorvin, D. V. Pinchuk
    Abstract:

    In order to replace expensive coke, various fuels are added to the Blast sent to the Blast Furnace: pulverized coal, natural gas, coke-oven gas, fuel oil, etc. A less common alternative is to introduce chunk anthracite through the charge hole. The use of chunk anthracite may considerably reduce the coke consumption and the production costs of the hot metal in circumstances where pulverized-coal injection is not employed and its introduction would require the use of high-quality iron ore and coke and also special preparations of the Furnace and the associated systems. Chunk anthracite proves especially effective where there are constraints on the Furnace productivity on account of production problems, the Furnace is switched to slower Operation, and plant economics must be improved.

  • Investigation of Coke Reactivity Effect on Parameters of Blast Furnace Operation
    2010
    Co-Authors: V. P. Lyalyuk, A. K. Tarakanov, P. I. Otorvin, V. A. Sheremet, A. V. Kekuh, D. A. Kassim
    Abstract:

    Cold strength indices М25(40) and М10 determine gas permeability of burden layer in the Blast Furnace to zone of liquid-plastic state and coke windows in this zone. CRI and CSR indices determine mechanical strength of coke in the lower part of Furnace stack, in the zone of liquidplastic state and below it including Furnace hearth. It is incorrect to contrast them or diminish the importance of each index for Blast-Furnace smelting.

R Kandiyoti - One of the best experts on this subject based on the ideXlab platform.

  • characterization of tuyere level core drill coke samples from Blast Furnace Operation
    Energy & Fuels, 2007
    Co-Authors: S Dong, N Paterson, Sergei G Kazarian, D R Dugwell, R Kandiyoti
    Abstract:

    A suite of tuyere-level coke samples have been withdrawn from a working Blast Furnace during coal injection, using the core-drilling technique. The samples have been characterized by size exclusion chromatography (SEC), Fourier transform Raman spectroscopy (FT-RS), and X-ray powder diffraction (XRD) spectroscopy. The 1-methyl-2-pyrrolidinone (NMP) extracts of the cokes sampled from the “bosh”, the rear of the “birdʼs nest”, and the “dead man” zones were found by SEC to contain heavy soot-like materials (ca. 107–108 apparent mass units). In contrast, NMP extracts of cokes taken from the raceway and the front of the “birdʼs nest” only contained a small amount of material of relatively lower apparent molecular mass (up to ca. 105 u). Since the feed coke contained no materials extractable by the present method, the soot-like materials are thought to have formed during the reactions of volatile matter released from the injectant coal, probably via dehydrogenation and repolymerization of the tars. The Raman spe...