China Iron and Steel Association

Beijing, China

China Iron and Steel Association

Beijing, China
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Kexin J.,University of Science and Technology Beijing | Kexin J.,CSIRO | Jianliang Z.,University of Science and Technology Beijing | Chunlin C.,CSIRO | And 2 more authors.
ISIJ International | Year: 2017

Operational smoothly of ironmaking process is determined to a great extent by its slag performance especially for the large blast furnace. Operation characteristic of super-large blast furnace slag in China was summarized and the appropriate adjustment measures for better performance of BF were analyzed based on the operation characteristic by using the MPE. The results show that MgO content ranges from 6.5-9.5 wt% and Al2O3 ranges in 11-16 wt% of the super-large blast furnaces. The hot metal temperature ranges between 1 490-1 520°C and C/S is controlled within 1.12 to 1.24. A slag operation concept is built for reference by the operation viscosity and the superheat temperature. The operation viscosity is 0.34±0.02 Pa·s and the superheat temperature is 80±10°C. Based on this, Mg/Al ratio can be reduced with the increasing C/S in the production. Mg/Al ratio of 15 wt% Al2O3 slag can be reduced to 0.4 in the high basicity of 1.3 and should be increased to 0.67 in the low basicity of 1.1. Mg/Al ratio of 0.53 (8 wt% MgO) is ideal if the basicity of slag changes in a wide range near 1.2. The rational Mg/Al ratio of the slag (C/S = 1.2) can be reduced to 0.33, 0.47 and 0.58 when the Al2O3 in the slag are 12 wt%, 15 wt% and 18 wt%, respectively. © 2017 ISIJ.


Jia T.,Northeastern University China | Feng J.,Northeastern University China | Wang B.,Northeastern University China | Wang G.,Northeastern University China | Li Y.,China Iron and Steel Association
Journal of Materials Processing Technology | Year: 2015

Using "ultra fast cooling (UFC) + thermo-mechanical treatment (TMT)" process, nanoscale cementite particles were obtained while the matrix varied from "proeutectoid ferrite + degenerated pearlite" to complete lath-like bainitic matrix by controlling the UFC stop temperature. Microstructures were examined by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results showed that TMT process promoted cementite precipitation in proeutectoid ferrite, leading to more uniformly distributed cementite particles. The tensile properties and Charpy V-notch (CVN) impact toughness were evaluated. The correlation with the microstructural features is then discussed in details. © 2015 Elsevier B.V. All rights reserved.


He F.,University of Science and Technology Beijing | Zhu L.,Agricultural University of Hebei | Jiang W.,China Iron and Steel Association
2014 International Conference on IT Convergence and Security, ICITCS 2014 | Year: 2014

It is one of the issues for international researchers engaging in data envelopment analysis (DEA) that how to evaluate the environmental efficiency of traditional industry with high pollution, high energy consumption under the background of circular economy. In this paper, we make use of the standard BCC DEA model which treats the undesirable outputs as inputs and undesirable slacks-based measurement (SBM) model to evaluate environmental efficiency of China's 48 iron and steel enterprises. The results indicate that BCC model overestimates efficiency and then cannot provide quantitative information accurately for company directors. So based on the undesirable-SBM model, we not only conclude that the average environmental efficiency of China's iron and steel industry is declining over the period 2006-2010 due to the excess of energy consumption, waste water, waste gas and solid waste emission, but also we finally analyze the more accurate energy saving and the undesirable outputs reduction potential. © 2014 IEEE.


Zhou D.D.,University of Science and Technology Beijing | Cheng S.S.,University of Science and Technology Beijing | Wang Y.S.,China Iron and Steel Association | Jiang X.,China Iron and Steel Association
Ironmaking and Steelmaking | Year: 2016

The development of large blast furnaces in China is crucial for energy saving, emission reduction and transformation and promotion processes of iron and steel industry. However, the development of large blast furnaces in China was affected by the lower stability state and lack of new technology developments. In this article, the operation indexes of large blast furnaces of China in 2015 were introduced. Then the reasons for lower stability state of large blast furnaces were analysed and some improved measures were proposed. In addition, some new technical thoughts on the development of large blast furnaces were also proposed. © 2016 Institute of Materials, Minerals and Mining


Zhou D.-D.,University of Science and Technology Beijing | Cheng S.-S.,University of Science and Technology Beijing | Wang Y.-S.,China Iron and Steel Association | Jiang X.,China Iron and Steel Association
ISIJ International | Year: 2015

This article reviews the production and technical characteristics of the large blast furnaces in China. The reasons for low level development of large blast furnace in past decades were analyzed. It introduces the production, raw materials and operation indexes of large blast furnaces from 2011 to 2014. On this basis, some thoughts on operations of large blast furnace were proposed. The affected factors on the development of large blast furnace were analyzed, the conclusion that the number of large blast furnace in China will increase in future was obtained. © 2015 ISIJ.


Han H.,CAS Institute of Process Engineering | Han H.,University of Science and Technology Beijing | Wu S.,University of Science and Technology Beijing | Xi J.,China Iron and Steel Association | Duan D.,CAS Institute of Process Engineering
Metalurgia International | Year: 2012

Pilbara Blending Iron Ore Powder (PB powder) is blending ores with good and poor quality iron ores, so the mixed state of PB power is uncertain. In this work, the self-characteristics of PB powder and its single-components were studied respectively, such as the macroscopic properties, microscopic properties, and high-temperature properties, and the behavior and effect in the sintering were mastered. Then, aiming at the uncertain mixed state of blending ore powder, the evaluation system of the PB powder mixed state was built, and the mixed state of blending ore powder mastered. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. the evaluation system of the PB powder mixed state can be used to accurately judge the composition of iron ore powder in different batches, which provide technical basis on the effective use of PB powder.


Li K.-J.,University of Science and Technology Beijing | Zhang J.-L.,University of Science and Technology Beijing | Zhang Y.-P.,University of Science and Technology Beijing | Liu Z.-J.,University of Science and Technology Beijing | Jiang X.,China Iron and Steel Association
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2014

Through the basic research on current situation of iron-making industry in China, the importance of iron-making industry in sustainable development was demonstrated, and the severe problems of energy consumption and environment protection were pointed out. And the key problems on energy saving and emission reduction in steel plants were analyzed based on carbon and energy flows, from which it was clear that the main task of emission reduction was to reduce the consumption of fossil fuels, such as coal and coke, and the main task of energy saving was to take advantage of the latent and sensible heat of top gas and sensible heat of blast furnace slag. Then, several advanced energy saving technologies, such as coke oven gas injection, injection of plastic scraps into the blast furnace, pure oxygen blowing and utilization of blast furnace slag, were analyzed. They did not make fundamental change to the blast furnace ironmaking process. Their popularity was critical to the improvement of energy saving and emission reduction in iron and steel industry in China. Finally, the research prospect of energy saving and emission reduction was indicated. In the short term, the utilization efficiency of fossil fuels should be improved based on in-depth research on consumption mechanism, and the structure of energy consumption optimized to alternate fossil fuel with clean energy. In the long term, the nature of iron making, carbon deoxidization, should be thought deeply in order to conduct exploratory research on innovation of ironmaking process and eliminate the fundamental shortcoming of current ironmaking process with high energy consumption and high emission.


Huang D.,China Iron and Steel Association | Chen L.-Y.,China Iron and Steel Association | Zhang L.-F.,China Iron and Steel Association | Li Q.-G.,China Iron and Steel Association | Li Y.,China Iron and Steel Association
Kang T'ieh/Iron and Steel | Year: 2015

The implementation of new environmental protection law began on January 1, 2015. And with it, some local policies were released soon. Green development has become an important way to realize the transformation and upgrading of iron and steel industry, to keep up the sustainable development and promote the social image and core competence of iron and steel industry. Current paper analyzes firstly the risks and challenges which are exposed to the pollution emissions. Then some key points during the management of energy conservation and environmental protection technology are introduced. At last, main innovation directions, some key technologies and engineering strategies of green development are put forward in the hope of providing some implications for the green transformation of iron and steel industry. © 2015, Chinese Society for Metals. All right reserved.


Shangguan F.-Q.,Control Iron and Steel Research Institute, China | Zhang C.-X.,Control Iron and Steel Research Institute, China | Li X.-P.,Control Iron and Steel Research Institute, China | Fan B.,Control Iron and Steel Research Institute, China | Huang D.,China Iron and Steel Association
Journal of Iron and Steel Research | Year: 2010

Several calculation methods of CO2 emission in the iron and steel industry were introduced and analyzed in detail, then the common grounds and differences among them were concluded as the references of the CO 2 emission calculation in Chinese iron and steel industry or enterprises.

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