The Experts below are selected from a list of 1716 Experts worldwide ranked by ideXlab platform

Wang Zhaocai - One of the best experts on this subject based on the ideXlab platform.

  • Resource utilization of municipal solid waste incineration fly ash in iron Ore Sintering process: A novel thermal treatment
    Journal of Cleaner Production, 2020
    Co-Authors: Guojing Wong, Xiao-hui Fan, Gan Min, Ji Zhiyun, Ye Hengdi, Zhou Zhi'an, Wang Zhaocai
    Abstract:

    Abstract High calcium in the municipal solid waste incineration (MSWI) fly ash made it a potential material for replacing part of the calcium flux used in iron Ore Sintering process. The results show that the Sintering indexes were not negative affected but improved slightly as MSWI fly ash added, which is mainly because the ultra-fine material helped to obtain a better granulation and produced liquid phase under high temperature. Removal rates of harmful elements were improved as the increased content of chlorine brought in by the MSWI fly ash, which means that the residual contents of K, Na, Pb and Zn in the finished sinter were not increased significantly. 93.03% of the dioxins in the MSWI fly ash was degraded due to the fast heating rate and high temperature during Sintering process, both of which are favorable factors for the degradation of dioxins. Although the addition of the MSWI fly ash made the concentration of SO2 and dioxins in the flue gas increased, standardized discharge can still be realized through conventional activated carbon system for flue gas purification. TherefOre, the resource utilization and harmless disposal of MSWI fly ash can be realized through iron Ore Sintering process.

Xiao-hui Fan - One of the best experts on this subject based on the ideXlab platform.

  • Resource utilization of municipal solid waste incineration fly ash in iron Ore Sintering process: A novel thermal treatment
    Journal of Cleaner Production, 2020
    Co-Authors: Guojing Wong, Xiao-hui Fan, Gan Min, Ji Zhiyun, Ye Hengdi, Zhou Zhi'an, Wang Zhaocai
    Abstract:

    Abstract High calcium in the municipal solid waste incineration (MSWI) fly ash made it a potential material for replacing part of the calcium flux used in iron Ore Sintering process. The results show that the Sintering indexes were not negative affected but improved slightly as MSWI fly ash added, which is mainly because the ultra-fine material helped to obtain a better granulation and produced liquid phase under high temperature. Removal rates of harmful elements were improved as the increased content of chlorine brought in by the MSWI fly ash, which means that the residual contents of K, Na, Pb and Zn in the finished sinter were not increased significantly. 93.03% of the dioxins in the MSWI fly ash was degraded due to the fast heating rate and high temperature during Sintering process, both of which are favorable factors for the degradation of dioxins. Although the addition of the MSWI fly ash made the concentration of SO2 and dioxins in the flue gas increased, standardized discharge can still be realized through conventional activated carbon system for flue gas purification. TherefOre, the resource utilization and harmless disposal of MSWI fly ash can be realized through iron Ore Sintering process.

  • Insight into the application of hydrogen-rich energy in iron Ore Sintering: Parameters optimization and function mechanism
    Process Safety and Environmental Protection, 2020
    Co-Authors: Ji Zhiyun, Xiao-hui Fan, Huang Xiaoxian, Gan Min, Haoyu Zhou, Qian Liu, Xu-ling Chen
    Abstract:

    Abstract H2-rich gas has been widely regarded as a promising energy to substitute fossil energy in iron Ore Sintering process for CO2 reduction. This investigation mainly focused on researching the influences of H2-rich gas injection parameters over Sintering bed on Sintering performance, and elucidated the potential function mechanism through both experiment and numerical simulation. Results indicated that increasing injection concentration and prolonging injection time within a proper range improved sinter quality, and the recommended value was 0.6∼0.8 % and 8 min, respectively. Injecting H2-rich gas at earlier Sintering stages achieved greater improvement in Sintering quality compared with the ones injecting at later Sintering stages, and the recommended injection area was 5∼13min. Both experiment and numerical simulation results indicated that injecting H2-rich improved the thermal patterns of Sintering bed, with extended high-temperature areas for increasing the generation of high-strength calcium ferrite. Especially when injecting H2-rich gas under the recommended parameters, the heat distribution in Sintering bed was optimized and the Sintering quality of upper Sintering layer was obviously improved. Finally, an injection method for guiding the industrial application with its essence to inject H2-rich at earlier Sintering stages was proposed. The research findings provide a promising way for the efficient utilization of clean energy in iron Ore Sintering plants.

  • Soft-measuring models of thermal state in iron Ore Sintering process
    Measurement, 2018
    Co-Authors: Huang Xiaoxian, Xiao-hui Fan, Xu-ling Chen, Gan Min, Zhao Xinze
    Abstract:

    Abstract Thermal state of iron Ore Sintering in iron and steel production cannot be revealed straightforward, which is unfavorable for field operations. In this paper, the soft-measuring models were established to extract the feature points through curve fitting method and evaluate the whole state via random fOrest algorithm. All the models proposed were validated by the industrial data, and the results show that feature extraction model can identify the variation of reaction zones, and evaluation model possesses a classification accuracy over 95%. The soft-measuring models were integrated into the automatic control system developed for Sintering plant. Running results illustrate that the system can enhance the stable control and reduce the power consumption of Sintering process.

  • optimization of iron Ore Sintering process based on elm model and multi criteria evaluation
    Neural Computing and Applications, 2017
    Co-Authors: Xiao-hui Fan, Gui-ming Yang, Guo Chen, Ying Sun
    Abstract:

    Optimization of iron Ore Sintering process is to maximize the productivity and the sinter Ore quality while minimizing the energy consumption. However, these economic and technical criteria are sometimes contradictory and the improvement of one criterion generally leads to the deterioration of other criteria. This paper aims to seek the optimal manipulated parameters from the production data by considering this contraction. Several typical groups of manipulated parameters were firstly obtained by clustering the production data, and then one new artificial neural network model--online sequential extreme learning machine (OS-ELM) was established to predict FeO content and tumble strength of sinter Ores for each group. Validation results showed that the OS-ELM model established possessed a higher accuracy than conventional BP (back propagation) model. Finally, a multi-criteria evaluation method--VIKOR was applied to obtain a set of compromise optimal solutions. Taking into account both economic and technical criteria, the final solutions acquired are instructive, and the optimal solution can directly reduce fuel consumption by about 0.5 kg per ton sinter Ore without degrading sinter Ore quality seriously.

  • NO x Reduction in the Iron Ore Sintering Process with Flue Gas Recirculation
    JOM, 2017
    Co-Authors: Yu Zhiyuan, Xiao-hui Fan, Gan Min, Xu-ling Chen
    Abstract:

    Flue gas recirculation (FGR) has been implemented for exhaust gas emissions reduction in iron Ore Sintering. However, the mechanism of NOx reduction through FGR is still unclear. In this paper, the laboratory pot-grate Sintering test showed a 30% reduction in gas flow and 15.51% reduction in NOx emissions achieved with a 30% FGR ratio, and the sinter indexes almost matched those of the conventional process. In the sinter zone, NO-CO catalytic reduction occurs in the range of 500–900°C. When the sinter temperature is 700°C, the highest nitrogen reduction ratio (NRR) achieved is 8%; however, the NOx reduction is inhibited as the post-combustion of CO starts when the temperature increases beyond 700°C. NOx in the flue gas is mainly a product of the fuel combustion in the combustion zone, as the nitrogen conversion rate reaches 50–60%, because the N-containing intermediates exist during the fuel combustion. The existence of NO in the FGR gas inhibits the NOx generation from the fuel combustion, and the NO elimination—through the NO-carbon reaction—is significant in the combustion zone. The NRR in the combustion zone reaches a range of 18–20%.

Guojing Wong - One of the best experts on this subject based on the ideXlab platform.

  • Resource utilization of municipal solid waste incineration fly ash in iron Ore Sintering process: A novel thermal treatment
    Journal of Cleaner Production, 2020
    Co-Authors: Guojing Wong, Xiao-hui Fan, Gan Min, Ji Zhiyun, Ye Hengdi, Zhou Zhi'an, Wang Zhaocai
    Abstract:

    Abstract High calcium in the municipal solid waste incineration (MSWI) fly ash made it a potential material for replacing part of the calcium flux used in iron Ore Sintering process. The results show that the Sintering indexes were not negative affected but improved slightly as MSWI fly ash added, which is mainly because the ultra-fine material helped to obtain a better granulation and produced liquid phase under high temperature. Removal rates of harmful elements were improved as the increased content of chlorine brought in by the MSWI fly ash, which means that the residual contents of K, Na, Pb and Zn in the finished sinter were not increased significantly. 93.03% of the dioxins in the MSWI fly ash was degraded due to the fast heating rate and high temperature during Sintering process, both of which are favorable factors for the degradation of dioxins. Although the addition of the MSWI fly ash made the concentration of SO2 and dioxins in the flue gas increased, standardized discharge can still be realized through conventional activated carbon system for flue gas purification. TherefOre, the resource utilization and harmless disposal of MSWI fly ash can be realized through iron Ore Sintering process.

Gan Min - One of the best experts on this subject based on the ideXlab platform.

  • Insight into the application of hydrogen-rich energy in iron Ore Sintering: Parameters optimization and function mechanism
    Process Safety and Environmental Protection, 2020
    Co-Authors: Ji Zhiyun, Xiao-hui Fan, Huang Xiaoxian, Gan Min, Haoyu Zhou, Qian Liu, Xu-ling Chen
    Abstract:

    Abstract H2-rich gas has been widely regarded as a promising energy to substitute fossil energy in iron Ore Sintering process for CO2 reduction. This investigation mainly focused on researching the influences of H2-rich gas injection parameters over Sintering bed on Sintering performance, and elucidated the potential function mechanism through both experiment and numerical simulation. Results indicated that increasing injection concentration and prolonging injection time within a proper range improved sinter quality, and the recommended value was 0.6∼0.8 % and 8 min, respectively. Injecting H2-rich gas at earlier Sintering stages achieved greater improvement in Sintering quality compared with the ones injecting at later Sintering stages, and the recommended injection area was 5∼13min. Both experiment and numerical simulation results indicated that injecting H2-rich improved the thermal patterns of Sintering bed, with extended high-temperature areas for increasing the generation of high-strength calcium ferrite. Especially when injecting H2-rich gas under the recommended parameters, the heat distribution in Sintering bed was optimized and the Sintering quality of upper Sintering layer was obviously improved. Finally, an injection method for guiding the industrial application with its essence to inject H2-rich at earlier Sintering stages was proposed. The research findings provide a promising way for the efficient utilization of clean energy in iron Ore Sintering plants.

  • Resource utilization of municipal solid waste incineration fly ash in iron Ore Sintering process: A novel thermal treatment
    Journal of Cleaner Production, 2020
    Co-Authors: Guojing Wong, Xiao-hui Fan, Gan Min, Ji Zhiyun, Ye Hengdi, Zhou Zhi'an, Wang Zhaocai
    Abstract:

    Abstract High calcium in the municipal solid waste incineration (MSWI) fly ash made it a potential material for replacing part of the calcium flux used in iron Ore Sintering process. The results show that the Sintering indexes were not negative affected but improved slightly as MSWI fly ash added, which is mainly because the ultra-fine material helped to obtain a better granulation and produced liquid phase under high temperature. Removal rates of harmful elements were improved as the increased content of chlorine brought in by the MSWI fly ash, which means that the residual contents of K, Na, Pb and Zn in the finished sinter were not increased significantly. 93.03% of the dioxins in the MSWI fly ash was degraded due to the fast heating rate and high temperature during Sintering process, both of which are favorable factors for the degradation of dioxins. Although the addition of the MSWI fly ash made the concentration of SO2 and dioxins in the flue gas increased, standardized discharge can still be realized through conventional activated carbon system for flue gas purification. TherefOre, the resource utilization and harmless disposal of MSWI fly ash can be realized through iron Ore Sintering process.

  • Soft-measuring models of thermal state in iron Ore Sintering process
    Measurement, 2018
    Co-Authors: Huang Xiaoxian, Xiao-hui Fan, Xu-ling Chen, Gan Min, Zhao Xinze
    Abstract:

    Abstract Thermal state of iron Ore Sintering in iron and steel production cannot be revealed straightforward, which is unfavorable for field operations. In this paper, the soft-measuring models were established to extract the feature points through curve fitting method and evaluate the whole state via random fOrest algorithm. All the models proposed were validated by the industrial data, and the results show that feature extraction model can identify the variation of reaction zones, and evaluation model possesses a classification accuracy over 95%. The soft-measuring models were integrated into the automatic control system developed for Sintering plant. Running results illustrate that the system can enhance the stable control and reduce the power consumption of Sintering process.

  • NO x Reduction in the Iron Ore Sintering Process with Flue Gas Recirculation
    JOM, 2017
    Co-Authors: Yu Zhiyuan, Xiao-hui Fan, Gan Min, Xu-ling Chen
    Abstract:

    Flue gas recirculation (FGR) has been implemented for exhaust gas emissions reduction in iron Ore Sintering. However, the mechanism of NOx reduction through FGR is still unclear. In this paper, the laboratory pot-grate Sintering test showed a 30% reduction in gas flow and 15.51% reduction in NOx emissions achieved with a 30% FGR ratio, and the sinter indexes almost matched those of the conventional process. In the sinter zone, NO-CO catalytic reduction occurs in the range of 500–900°C. When the sinter temperature is 700°C, the highest nitrogen reduction ratio (NRR) achieved is 8%; however, the NOx reduction is inhibited as the post-combustion of CO starts when the temperature increases beyond 700°C. NOx in the flue gas is mainly a product of the fuel combustion in the combustion zone, as the nitrogen conversion rate reaches 50–60%, because the N-containing intermediates exist during the fuel combustion. The existence of NO in the FGR gas inhibits the NOx generation from the fuel combustion, and the NO elimination—through the NO-carbon reaction—is significant in the combustion zone. The NRR in the combustion zone reaches a range of 18–20%.

Zhou Zhi'an - One of the best experts on this subject based on the ideXlab platform.

  • Resource utilization of municipal solid waste incineration fly ash in iron Ore Sintering process: A novel thermal treatment
    Journal of Cleaner Production, 2020
    Co-Authors: Guojing Wong, Xiao-hui Fan, Gan Min, Ji Zhiyun, Ye Hengdi, Zhou Zhi'an, Wang Zhaocai
    Abstract:

    Abstract High calcium in the municipal solid waste incineration (MSWI) fly ash made it a potential material for replacing part of the calcium flux used in iron Ore Sintering process. The results show that the Sintering indexes were not negative affected but improved slightly as MSWI fly ash added, which is mainly because the ultra-fine material helped to obtain a better granulation and produced liquid phase under high temperature. Removal rates of harmful elements were improved as the increased content of chlorine brought in by the MSWI fly ash, which means that the residual contents of K, Na, Pb and Zn in the finished sinter were not increased significantly. 93.03% of the dioxins in the MSWI fly ash was degraded due to the fast heating rate and high temperature during Sintering process, both of which are favorable factors for the degradation of dioxins. Although the addition of the MSWI fly ash made the concentration of SO2 and dioxins in the flue gas increased, standardized discharge can still be realized through conventional activated carbon system for flue gas purification. TherefOre, the resource utilization and harmless disposal of MSWI fly ash can be realized through iron Ore Sintering process.