The Experts below are selected from a list of 12006 Experts worldwide ranked by ideXlab platform
Antti Arasto - One of the best experts on this subject based on the ideXlab platform.
-
Oxygen blast furnace with CO2 capture and storage at an integrated Steel Mill—Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2014Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Jarmo Lilja, Miika SihvonenAbstract:Abstract In this study application of OBF with and without CCS to an integrated Steel Mill is investigated. The study is based on the real, Ruukki Metals Ltd.’s existing Steel Mill, located in the city of Raahe, Finland. Implications of application of OBF to energy and mass balances at the site are studied. Based on the technical evaluation, costs and feasibility for carbon capture are estimated. The energy and mass balance basis is presented in this first part of the series of two papers. Costs, feasibility and sensitivity analysis are assessed in the second part of the series (Tsupari et al. 2014. Int. J. Greenhouse Gas Control). The impact of applying OBF at an integrated Steel Mill is evaluated based on a consequential assessment following the methodology of Arasto et al. (2013). Int. J. Greenhouse Gas Control 16 (August) pp. 271–277 concentrating only on the parts of the Steelmaking processes affected by the deployment of OBF and CO 2 capture. The technical processes, CO 2 capture and the Steelmaking processes affected were modelled using Aspen Plus process modelling software and the results were used to estimate the CO 2 emission reduction potential with OBF technology at an integrated Steel Mill. The results show that the CO 2 emission from an iron and Steel Mill can be significantly reduced by application of an oxygen blast furnace and CCS. By applying only the blast furnace process, the emissions can already be reduced by 1.2 Mt/a without storing the separated CO 2 . If captured CO 2 is also purified and stored permanently, the emission can be further reduced by an additional 1.4 Mt/a. This is a significant reduction considering that the production of the Mill stays the same as in the reference case. In addition to carbon footprint of the production, application of oxygen blast furnace also has significant impact on coke consumption and energy balance on the site.
-
post combustion capture of co2 at an integrated Steel Mill part ii economic feasibility
International Journal of Greenhouse Gas Control, 2013Co-Authors: Eemeli Tsupari, Antti Arasto, Janne Kärki, Erkki PisiläAbstract:Abstract In this paper the economics of the technical possibilities presented in Part I ( Arasto et al., 2013 ) for applying post-combustion CO 2 capture at an integrated Steel Mill were studied. Implications of different CO 2 amounts captured, solvents and process integration levels to the greenhouse gas balances and economics of operation are compared to the reference case without CCS trough several case studies using variable market prices of electricity and CO 2 emission allowances. The break-even price (BEP) of CO 2 emissions (e.g. CO 2 emission allowances), where CCS becomes more profitable than the reference case, is about 72 €/t CO 2 with an electricity price of 100 €/MWh in the most favourable studied case using a MEA solvent. For the more advanced solvents considered, the BEP level is about 64 €/t CO 2 . With higher prices of electricity, the costs for CCS increase rapidly. The costs for globally avoided emissions, based on a streamlined life-cycle analysis, are generally higher than the BEP's, depending on the fuels that are assumed to eventually compensate the decreased electricity production in the energy system. The amounts of captured CO 2 corresponding to the above presented prices in the most favourable cases are typically in the range of 2–3 Mt CO 2 /a, which accounts for 50–75% of the site emissions.
-
Post-combustion capture of CO2 at an integrated Steel Mill: Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Erkki Pisilä, Lotta SorsamäkiAbstract:Abstract In this study different possibilities for applying post-combustion capture at an integrated Steel Mill in order to reduce carbon dioxide emissions were studied. Implications of different amounts of CO 2 captured, different solvents for post-combustion capture and different heat supply options for solvent regeneration to the energy balance and greenhouse gas emissions of the Steel Mill are compared to that of the base case for the Steel Mill. The case study is based on Ruukki Metals Ltd.’s Raahe Steel Mill that is situated on the coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mt/year. Carbon capture processes were modelled using Aspen Plus process modelling software and results were used to estimate the potential for reducing CO 2 emissions at an integrated Steel Mill from a plant operator's point of view. Different heat integration options and heat utilization scenarios were investigated. The heat available for solvent regeneration varied between these heat utilization scenarios and thus partial capture of CO 2 was investigated with the CO 2 amount captured depending on the heat available for solvent regeneration in the different case studies. The results of the study show a significant CO 2 reduction potential using CCS. Approximately 50–75% of the emissions from the site could be captured using post-combustion capture. Capturing a larger amount of emissions would be technically less feasible due to the large number of small stacks around the large, integrated Steel Mill site.
-
Costs and Potential of Carbon Capture and Storage at an Integrated Steel Mill
Energy Procedia, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Miika Sihvonen, Jarmo LiljaAbstract:Abstract In this study different possibilities and the feasibility of applying carbon capture at an integrated Steel Mill based on blast furnace process, in order to reduce carbon dioxide emissions were studied. Technologies considered for capturing of CO 2 are post-combustion carbon capture (PCC) and oxygen blast furnace route (OBF). Post-combustion capture for the integrated Steel Mill was evaluated in an earlier study by Arasto et Al. and Tsupari et Al. [1,2]. Implications of different capture amounts, different solvents for post-combustion capture and process integration levels to the greenhouse gas balance and operation economics are compared to the Steel production base case with varying costs of CO 2 emission allowances. Furthermore the effect of reducing the carbon intensity of Steel production on the final Steel production cost is evaluated. Iron and Steel industry is responsible of around 5% of the overall global CO 2 emissions [3]. Steel production based on the blast furnace and basic oxygen furnace-based route is the main technology corresponding to the growth in global Steel production [4] and this technology route is also the main source of CO 2 emissions in the iron and Steel industry. The assessment of potential and cost for carbon capture and storage in the iron and Steel industry is based on a case study on Ruukki Metals Oy's Steel Mill in Raahe. The Mill is situated on the northeastern coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mton of CO 2 /year. Raahe Steel Mill produces district heat for use in the town nearby as well as for use onsite for heating of the premises. The power plant is connected to the national electricity grid, and thus it is possible to buy and sell electricity across system boundary. In contrast to power plant applications of CCS, CO 2 emission sources at an integrated Steel Mill are scattered around the industrial site and the flue gases are led to several stacks. Due to this, the capture process evaluation is much more complex and requires system level optimization. Carbon capture processes and process integration options were modeled using Aspen Plus process modeling software and the results were used to estimate CO 2 emission reduction possibilities and carbon abatement costs at the integrated Steel Mill from an investor's point of view. Different heat integration options and heat utilization scenarios were investigated and optimized with a custom-built CC-Skynet™ economics toolkit. Heat available for solvent regeneration varies between these heat utilization scenarios and thus different capture amount are investigated depending on the heat available for solvent regeneration in different case studies. Also different technologies related to oxygen blast furnace were considered, both for oxygen production and for top gas treatment. The application of oxygen blast furnace effects directly e.g. to the coke consumption of process and power production on site, and thus a new design considering new heat and process gas integration opportunities is essential. With a whole chain approach, including CO 2 capture, processing, transport and storage, results show significant reduction potential at an integrated Steel Mill with carbon capture technologies. Ship transportation of CO 2 is considered due to the location of the installation. Results show also the cost structure and feasibility of the studied technologies. Cost breakeven points for carbon capture at an integrated Steel Mill, for the plant owner and costs for globally avoided emissions are calculated. The study also reveals some major technical restrictions of the application. Finally the pros and cons of the technologies are compared and the role and potential of CCS as a carbon abatement tool in the European Steel industry is considered.
Janne Kärki - One of the best experts on this subject based on the ideXlab platform.
-
Oxygen blast furnace with CO2 capture and storage at an integrated Steel Mill—Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2014Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Jarmo Lilja, Miika SihvonenAbstract:Abstract In this study application of OBF with and without CCS to an integrated Steel Mill is investigated. The study is based on the real, Ruukki Metals Ltd.’s existing Steel Mill, located in the city of Raahe, Finland. Implications of application of OBF to energy and mass balances at the site are studied. Based on the technical evaluation, costs and feasibility for carbon capture are estimated. The energy and mass balance basis is presented in this first part of the series of two papers. Costs, feasibility and sensitivity analysis are assessed in the second part of the series (Tsupari et al. 2014. Int. J. Greenhouse Gas Control). The impact of applying OBF at an integrated Steel Mill is evaluated based on a consequential assessment following the methodology of Arasto et al. (2013). Int. J. Greenhouse Gas Control 16 (August) pp. 271–277 concentrating only on the parts of the Steelmaking processes affected by the deployment of OBF and CO 2 capture. The technical processes, CO 2 capture and the Steelmaking processes affected were modelled using Aspen Plus process modelling software and the results were used to estimate the CO 2 emission reduction potential with OBF technology at an integrated Steel Mill. The results show that the CO 2 emission from an iron and Steel Mill can be significantly reduced by application of an oxygen blast furnace and CCS. By applying only the blast furnace process, the emissions can already be reduced by 1.2 Mt/a without storing the separated CO 2 . If captured CO 2 is also purified and stored permanently, the emission can be further reduced by an additional 1.4 Mt/a. This is a significant reduction considering that the production of the Mill stays the same as in the reference case. In addition to carbon footprint of the production, application of oxygen blast furnace also has significant impact on coke consumption and energy balance on the site.
-
post combustion capture of co2 at an integrated Steel Mill part ii economic feasibility
International Journal of Greenhouse Gas Control, 2013Co-Authors: Eemeli Tsupari, Antti Arasto, Janne Kärki, Erkki PisiläAbstract:Abstract In this paper the economics of the technical possibilities presented in Part I ( Arasto et al., 2013 ) for applying post-combustion CO 2 capture at an integrated Steel Mill were studied. Implications of different CO 2 amounts captured, solvents and process integration levels to the greenhouse gas balances and economics of operation are compared to the reference case without CCS trough several case studies using variable market prices of electricity and CO 2 emission allowances. The break-even price (BEP) of CO 2 emissions (e.g. CO 2 emission allowances), where CCS becomes more profitable than the reference case, is about 72 €/t CO 2 with an electricity price of 100 €/MWh in the most favourable studied case using a MEA solvent. For the more advanced solvents considered, the BEP level is about 64 €/t CO 2 . With higher prices of electricity, the costs for CCS increase rapidly. The costs for globally avoided emissions, based on a streamlined life-cycle analysis, are generally higher than the BEP's, depending on the fuels that are assumed to eventually compensate the decreased electricity production in the energy system. The amounts of captured CO 2 corresponding to the above presented prices in the most favourable cases are typically in the range of 2–3 Mt CO 2 /a, which accounts for 50–75% of the site emissions.
-
Post-combustion capture of CO2 at an integrated Steel Mill: Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Erkki Pisilä, Lotta SorsamäkiAbstract:Abstract In this study different possibilities for applying post-combustion capture at an integrated Steel Mill in order to reduce carbon dioxide emissions were studied. Implications of different amounts of CO 2 captured, different solvents for post-combustion capture and different heat supply options for solvent regeneration to the energy balance and greenhouse gas emissions of the Steel Mill are compared to that of the base case for the Steel Mill. The case study is based on Ruukki Metals Ltd.’s Raahe Steel Mill that is situated on the coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mt/year. Carbon capture processes were modelled using Aspen Plus process modelling software and results were used to estimate the potential for reducing CO 2 emissions at an integrated Steel Mill from a plant operator's point of view. Different heat integration options and heat utilization scenarios were investigated. The heat available for solvent regeneration varied between these heat utilization scenarios and thus partial capture of CO 2 was investigated with the CO 2 amount captured depending on the heat available for solvent regeneration in the different case studies. The results of the study show a significant CO 2 reduction potential using CCS. Approximately 50–75% of the emissions from the site could be captured using post-combustion capture. Capturing a larger amount of emissions would be technically less feasible due to the large number of small stacks around the large, integrated Steel Mill site.
-
Costs and Potential of Carbon Capture and Storage at an Integrated Steel Mill
Energy Procedia, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Miika Sihvonen, Jarmo LiljaAbstract:Abstract In this study different possibilities and the feasibility of applying carbon capture at an integrated Steel Mill based on blast furnace process, in order to reduce carbon dioxide emissions were studied. Technologies considered for capturing of CO 2 are post-combustion carbon capture (PCC) and oxygen blast furnace route (OBF). Post-combustion capture for the integrated Steel Mill was evaluated in an earlier study by Arasto et Al. and Tsupari et Al. [1,2]. Implications of different capture amounts, different solvents for post-combustion capture and process integration levels to the greenhouse gas balance and operation economics are compared to the Steel production base case with varying costs of CO 2 emission allowances. Furthermore the effect of reducing the carbon intensity of Steel production on the final Steel production cost is evaluated. Iron and Steel industry is responsible of around 5% of the overall global CO 2 emissions [3]. Steel production based on the blast furnace and basic oxygen furnace-based route is the main technology corresponding to the growth in global Steel production [4] and this technology route is also the main source of CO 2 emissions in the iron and Steel industry. The assessment of potential and cost for carbon capture and storage in the iron and Steel industry is based on a case study on Ruukki Metals Oy's Steel Mill in Raahe. The Mill is situated on the northeastern coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mton of CO 2 /year. Raahe Steel Mill produces district heat for use in the town nearby as well as for use onsite for heating of the premises. The power plant is connected to the national electricity grid, and thus it is possible to buy and sell electricity across system boundary. In contrast to power plant applications of CCS, CO 2 emission sources at an integrated Steel Mill are scattered around the industrial site and the flue gases are led to several stacks. Due to this, the capture process evaluation is much more complex and requires system level optimization. Carbon capture processes and process integration options were modeled using Aspen Plus process modeling software and the results were used to estimate CO 2 emission reduction possibilities and carbon abatement costs at the integrated Steel Mill from an investor's point of view. Different heat integration options and heat utilization scenarios were investigated and optimized with a custom-built CC-Skynet™ economics toolkit. Heat available for solvent regeneration varies between these heat utilization scenarios and thus different capture amount are investigated depending on the heat available for solvent regeneration in different case studies. Also different technologies related to oxygen blast furnace were considered, both for oxygen production and for top gas treatment. The application of oxygen blast furnace effects directly e.g. to the coke consumption of process and power production on site, and thus a new design considering new heat and process gas integration opportunities is essential. With a whole chain approach, including CO 2 capture, processing, transport and storage, results show significant reduction potential at an integrated Steel Mill with carbon capture technologies. Ship transportation of CO 2 is considered due to the location of the installation. Results show also the cost structure and feasibility of the studied technologies. Cost breakeven points for carbon capture at an integrated Steel Mill, for the plant owner and costs for globally avoided emissions are calculated. The study also reveals some major technical restrictions of the application. Finally the pros and cons of the technologies are compared and the role and potential of CCS as a carbon abatement tool in the European Steel industry is considered.
Miika Sihvonen - One of the best experts on this subject based on the ideXlab platform.
-
Oxygen blast furnace with CO2 capture and storage at an integrated Steel Mill—Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2014Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Jarmo Lilja, Miika SihvonenAbstract:Abstract In this study application of OBF with and without CCS to an integrated Steel Mill is investigated. The study is based on the real, Ruukki Metals Ltd.’s existing Steel Mill, located in the city of Raahe, Finland. Implications of application of OBF to energy and mass balances at the site are studied. Based on the technical evaluation, costs and feasibility for carbon capture are estimated. The energy and mass balance basis is presented in this first part of the series of two papers. Costs, feasibility and sensitivity analysis are assessed in the second part of the series (Tsupari et al. 2014. Int. J. Greenhouse Gas Control). The impact of applying OBF at an integrated Steel Mill is evaluated based on a consequential assessment following the methodology of Arasto et al. (2013). Int. J. Greenhouse Gas Control 16 (August) pp. 271–277 concentrating only on the parts of the Steelmaking processes affected by the deployment of OBF and CO 2 capture. The technical processes, CO 2 capture and the Steelmaking processes affected were modelled using Aspen Plus process modelling software and the results were used to estimate the CO 2 emission reduction potential with OBF technology at an integrated Steel Mill. The results show that the CO 2 emission from an iron and Steel Mill can be significantly reduced by application of an oxygen blast furnace and CCS. By applying only the blast furnace process, the emissions can already be reduced by 1.2 Mt/a without storing the separated CO 2 . If captured CO 2 is also purified and stored permanently, the emission can be further reduced by an additional 1.4 Mt/a. This is a significant reduction considering that the production of the Mill stays the same as in the reference case. In addition to carbon footprint of the production, application of oxygen blast furnace also has significant impact on coke consumption and energy balance on the site.
-
Costs and Potential of Carbon Capture and Storage at an Integrated Steel Mill
Energy Procedia, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Miika Sihvonen, Jarmo LiljaAbstract:Abstract In this study different possibilities and the feasibility of applying carbon capture at an integrated Steel Mill based on blast furnace process, in order to reduce carbon dioxide emissions were studied. Technologies considered for capturing of CO 2 are post-combustion carbon capture (PCC) and oxygen blast furnace route (OBF). Post-combustion capture for the integrated Steel Mill was evaluated in an earlier study by Arasto et Al. and Tsupari et Al. [1,2]. Implications of different capture amounts, different solvents for post-combustion capture and process integration levels to the greenhouse gas balance and operation economics are compared to the Steel production base case with varying costs of CO 2 emission allowances. Furthermore the effect of reducing the carbon intensity of Steel production on the final Steel production cost is evaluated. Iron and Steel industry is responsible of around 5% of the overall global CO 2 emissions [3]. Steel production based on the blast furnace and basic oxygen furnace-based route is the main technology corresponding to the growth in global Steel production [4] and this technology route is also the main source of CO 2 emissions in the iron and Steel industry. The assessment of potential and cost for carbon capture and storage in the iron and Steel industry is based on a case study on Ruukki Metals Oy's Steel Mill in Raahe. The Mill is situated on the northeastern coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mton of CO 2 /year. Raahe Steel Mill produces district heat for use in the town nearby as well as for use onsite for heating of the premises. The power plant is connected to the national electricity grid, and thus it is possible to buy and sell electricity across system boundary. In contrast to power plant applications of CCS, CO 2 emission sources at an integrated Steel Mill are scattered around the industrial site and the flue gases are led to several stacks. Due to this, the capture process evaluation is much more complex and requires system level optimization. Carbon capture processes and process integration options were modeled using Aspen Plus process modeling software and the results were used to estimate CO 2 emission reduction possibilities and carbon abatement costs at the integrated Steel Mill from an investor's point of view. Different heat integration options and heat utilization scenarios were investigated and optimized with a custom-built CC-Skynet™ economics toolkit. Heat available for solvent regeneration varies between these heat utilization scenarios and thus different capture amount are investigated depending on the heat available for solvent regeneration in different case studies. Also different technologies related to oxygen blast furnace were considered, both for oxygen production and for top gas treatment. The application of oxygen blast furnace effects directly e.g. to the coke consumption of process and power production on site, and thus a new design considering new heat and process gas integration opportunities is essential. With a whole chain approach, including CO 2 capture, processing, transport and storage, results show significant reduction potential at an integrated Steel Mill with carbon capture technologies. Ship transportation of CO 2 is considered due to the location of the installation. Results show also the cost structure and feasibility of the studied technologies. Cost breakeven points for carbon capture at an integrated Steel Mill, for the plant owner and costs for globally avoided emissions are calculated. The study also reveals some major technical restrictions of the application. Finally the pros and cons of the technologies are compared and the role and potential of CCS as a carbon abatement tool in the European Steel industry is considered.
Eemelil Tsupari - One of the best experts on this subject based on the ideXlab platform.
-
Oxygen blast furnace with CO2 capture and storage at an integrated Steel Mill—Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2014Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Jarmo Lilja, Miika SihvonenAbstract:Abstract In this study application of OBF with and without CCS to an integrated Steel Mill is investigated. The study is based on the real, Ruukki Metals Ltd.’s existing Steel Mill, located in the city of Raahe, Finland. Implications of application of OBF to energy and mass balances at the site are studied. Based on the technical evaluation, costs and feasibility for carbon capture are estimated. The energy and mass balance basis is presented in this first part of the series of two papers. Costs, feasibility and sensitivity analysis are assessed in the second part of the series (Tsupari et al. 2014. Int. J. Greenhouse Gas Control). The impact of applying OBF at an integrated Steel Mill is evaluated based on a consequential assessment following the methodology of Arasto et al. (2013). Int. J. Greenhouse Gas Control 16 (August) pp. 271–277 concentrating only on the parts of the Steelmaking processes affected by the deployment of OBF and CO 2 capture. The technical processes, CO 2 capture and the Steelmaking processes affected were modelled using Aspen Plus process modelling software and the results were used to estimate the CO 2 emission reduction potential with OBF technology at an integrated Steel Mill. The results show that the CO 2 emission from an iron and Steel Mill can be significantly reduced by application of an oxygen blast furnace and CCS. By applying only the blast furnace process, the emissions can already be reduced by 1.2 Mt/a without storing the separated CO 2 . If captured CO 2 is also purified and stored permanently, the emission can be further reduced by an additional 1.4 Mt/a. This is a significant reduction considering that the production of the Mill stays the same as in the reference case. In addition to carbon footprint of the production, application of oxygen blast furnace also has significant impact on coke consumption and energy balance on the site.
-
Post-combustion capture of CO2 at an integrated Steel Mill: Part I: Technical concept analysis
International Journal of Greenhouse Gas Control, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Erkki Pisilä, Lotta SorsamäkiAbstract:Abstract In this study different possibilities for applying post-combustion capture at an integrated Steel Mill in order to reduce carbon dioxide emissions were studied. Implications of different amounts of CO 2 captured, different solvents for post-combustion capture and different heat supply options for solvent regeneration to the energy balance and greenhouse gas emissions of the Steel Mill are compared to that of the base case for the Steel Mill. The case study is based on Ruukki Metals Ltd.’s Raahe Steel Mill that is situated on the coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mt/year. Carbon capture processes were modelled using Aspen Plus process modelling software and results were used to estimate the potential for reducing CO 2 emissions at an integrated Steel Mill from a plant operator's point of view. Different heat integration options and heat utilization scenarios were investigated. The heat available for solvent regeneration varied between these heat utilization scenarios and thus partial capture of CO 2 was investigated with the CO 2 amount captured depending on the heat available for solvent regeneration in the different case studies. The results of the study show a significant CO 2 reduction potential using CCS. Approximately 50–75% of the emissions from the site could be captured using post-combustion capture. Capturing a larger amount of emissions would be technically less feasible due to the large number of small stacks around the large, integrated Steel Mill site.
-
Costs and Potential of Carbon Capture and Storage at an Integrated Steel Mill
Energy Procedia, 2013Co-Authors: Antti Arasto, Eemelil Tsupari, Janne Kärki, Miika Sihvonen, Jarmo LiljaAbstract:Abstract In this study different possibilities and the feasibility of applying carbon capture at an integrated Steel Mill based on blast furnace process, in order to reduce carbon dioxide emissions were studied. Technologies considered for capturing of CO 2 are post-combustion carbon capture (PCC) and oxygen blast furnace route (OBF). Post-combustion capture for the integrated Steel Mill was evaluated in an earlier study by Arasto et Al. and Tsupari et Al. [1,2]. Implications of different capture amounts, different solvents for post-combustion capture and process integration levels to the greenhouse gas balance and operation economics are compared to the Steel production base case with varying costs of CO 2 emission allowances. Furthermore the effect of reducing the carbon intensity of Steel production on the final Steel production cost is evaluated. Iron and Steel industry is responsible of around 5% of the overall global CO 2 emissions [3]. Steel production based on the blast furnace and basic oxygen furnace-based route is the main technology corresponding to the growth in global Steel production [4] and this technology route is also the main source of CO 2 emissions in the iron and Steel industry. The assessment of potential and cost for carbon capture and storage in the iron and Steel industry is based on a case study on Ruukki Metals Oy's Steel Mill in Raahe. The Mill is situated on the northeastern coast of the Gulf of Bothnia. It is the largest integrated Steel Mill in the Nordic countries producing hot rolled Steel plates and coils. It is also the largest CO 2 point source in Finland emitting approximately 4 Mton of CO 2 /year. Raahe Steel Mill produces district heat for use in the town nearby as well as for use onsite for heating of the premises. The power plant is connected to the national electricity grid, and thus it is possible to buy and sell electricity across system boundary. In contrast to power plant applications of CCS, CO 2 emission sources at an integrated Steel Mill are scattered around the industrial site and the flue gases are led to several stacks. Due to this, the capture process evaluation is much more complex and requires system level optimization. Carbon capture processes and process integration options were modeled using Aspen Plus process modeling software and the results were used to estimate CO 2 emission reduction possibilities and carbon abatement costs at the integrated Steel Mill from an investor's point of view. Different heat integration options and heat utilization scenarios were investigated and optimized with a custom-built CC-Skynet™ economics toolkit. Heat available for solvent regeneration varies between these heat utilization scenarios and thus different capture amount are investigated depending on the heat available for solvent regeneration in different case studies. Also different technologies related to oxygen blast furnace were considered, both for oxygen production and for top gas treatment. The application of oxygen blast furnace effects directly e.g. to the coke consumption of process and power production on site, and thus a new design considering new heat and process gas integration opportunities is essential. With a whole chain approach, including CO 2 capture, processing, transport and storage, results show significant reduction potential at an integrated Steel Mill with carbon capture technologies. Ship transportation of CO 2 is considered due to the location of the installation. Results show also the cost structure and feasibility of the studied technologies. Cost breakeven points for carbon capture at an integrated Steel Mill, for the plant owner and costs for globally avoided emissions are calculated. The study also reveals some major technical restrictions of the application. Finally the pros and cons of the technologies are compared and the role and potential of CCS as a carbon abatement tool in the European Steel industry is considered.
Vladimir Panjkovic - One of the best experts on this subject based on the ideXlab platform.
-
model for prediction of strip temperature in hot strip Steel Mill
Applied Thermal Engineering, 2007Co-Authors: Vladimir PanjkovicAbstract:Proper functioning of set-up models in a hot strip Steel Mill requires reliable prediction of strip temperature. Temperature prediction is particularly important for accurate calculation of rolling force because of strong dependence of yield stress and strip microstructure on temperature. A comprehensive model was developed to replace an obsolete model in the Western Port hot strip Mill of BlueScope Steel. The new model predicts the strip temperature evolution from the roughing Mill exit to the finishing Mill exit. It takes into account the radiative and convective heat losses, forced flow boiling and film boiling of water at strip surface, deformation heat in the roll gap, frictional sliding heat, heat of scale formation and the heat transfer between strip and work rolls through an oxide layer. The significance of phase transformation was also investigated. Model was tested with plant measurements and benchmarked against other models in the literature, and its performance was very good.
