Energy Materials 2017: Energy and Environmental Issues in Materials Manufacturing and Processing: Opportunities in the Steel Industry
Sponsored by: Chinese Society for Metals, TMS: Recycling and Environmental Technologies Committee
Program Organizers: Subodh Das, Phinix,LLC; Zhancheng Guo, University of Science and Technology Beijing; Minfang Han, China University of Mining and Technology, Beijing; Teruhisa Horita, AIST; Elsa Olivetti, Massachusetts Institute of Technology; Xingbo Liu, West Virginia Univ
Tuesday 8:30 AM
February 28, 2017
Location: San Diego Convention Ctr
Session Chair: Subodh Das, Phinix,LLC
8:30 AM Keynote
Green Development is the Future Direction for Chinese Steel Industry: Chunxia Zhang1; Fangqin Shangguan1; Haifeng Wang1; Shourong Zhang2; Ruiyu Yin1; 1Central Iron & Steel Research Institute; 2Wuhan Iron and Steel (Group) Co. Ltd (WISCO)
Progresses have been made in energy saving and environmental protection by Chinese steel industry. In 2013, the energy efficiency was improved by about 14.7%; specific smoke dust emission was reduced by about 58.3%; and specific SO2 emission was reduced by about 50.2%, comparing with that of 2005. Facing severe restriction of resources, energy and environment, Chinese steel industry must turn to green development. The green development strategic objectives up to 2020 have been set up based on the scenario analysis. For realizing the target of 2020, three kinds of key technologies have been selected for green development of steel industry and four countermeasures have also been put forward.
9:00 AM Invited
The Combined Cycle Power Plant (CCPP) Used In Energy Conversion of Steel Smelting Production: Chunqing Tan1; Xuezhi Dong1; Yixiang Yuan1; 1Chinese Academy of Sciences
High energy consumption is one of the main problems in the process of steel smelting production. Large amount of residual heat resources and fuel gases produced during this process can be recycled to improve the utilization rate of energy. Due to the low temperature of the residual heat and low calorific value of the fuels, it is difficult to reuse them. Based on the combined cycle power plant (CCPP), a new comprehensive energy utilization system was proposed and discussed in this paper. In this system, the steady-state combustion perform for the fuel with low calorific value (800~1200kcal/m3) can be obtained by improving flame tube, nozzle and swirler of combustor; the low temperature residual heat can be used in steam turbine cycle of CCPP; comparably the high temperature residual heat can be utilized in gas turbine cycle of CCPP. The efficiency of heat-electricity conversion can be significantly improved by using new blade shape in coal gas compressor and inter-cooling compressor. By optimizing the configuration of CCPP, the efficiency of the whole system was increased by 20%.
Green Manufacturing Process of Shougang Jingtang Steel Plant: Fuming Zhang1; Jianxin Xie1; 1Shougang Group
This paper describes the construction of green steel manufacturing process and energy flow network of Shougang Jingtang Steel Plant. This steel plant is based on the concept of new generation of circulating steel manufacturing process. It is provided with three functions: advanced steel product manufacture, high efficiency energy conversion, disposal and recovery of waste. Advanced interface technology of ironmaking and steelmaking is developed and adopted; energy flow network of the manufacturing process is configured. After the engineering commissioning, the energy consumption and emission of steel plant are reduced significantly. The waste heat, metallurgical gas and remaining energy of steel manufacturing process are recovered and reused. The collected dust and solid waste are recovered and reused as secondary resource; as well as the emission of dust, SOx and NOx are mitigated from steel manufacturing process. The green steel manufacturing and recycling economy are achieved, and the energy efficiency is improved significantly.
9:50 AM Invited
The Introduction and Process Optimization Research of Oxygen Blast Furnace Ironmaking Technology: Qingguo Xue1; Zeshang Dong1; Jingsong Wang1; Zeyi Jiang1; Haibin Zuo1; Xuefeng She1; Guang Wang1; 1University of Science and Technology Beijing
In order to reduce the energy consumption from iron and steel industry, decreasing coke rate by establishing oxygen blast furnace (OBF) ironmaking process is a favorable way. In recent years, many scholars and metallurgical workers from all over the world have made a lot of related work about this ironmaking process. The main content in this paper is as follows: The necessity, process characteristics and optimization research of OBF were introduced. The optimal OBF process were elected by the calculation of energy-mass balance mathematical model. In order to cope with the subsequent industrial test, theoretical calculation of the improved process is carried out. The process parameters under different oxygen enrichment rate 9%, 19%, 29%, and eventually reached 100% are calculated. After adopting the OBF ironmaking process the ironmaking costs and CO2 emissions can be greatly reduced.
10:10 AM Break
Prediction and Optimal Scheduling of Byproduct Gases in Steel Mill: Trends and Challenges: Xiancong Zhao1; Hao Bai1; Qi Shi1; Zhancheng Guo1; 1State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing
Byproduct gases generated during the iron and steel making process are important energy sources in steel plant, which accounted for 40% of total energy consumption. With the increasing need for production cost control in steel industry, the refined management of byproduct gases has become prominent. The prediction and optimal scheduling of byproduct gases are two key factors in optimal management of byproduct gases. However, due to the complexity and dispersivity of byproduct gas generation and consumption, it is it difficult to build a comprehensive and reasonable prediction and scheduling model. This paper reviews current methods in the prediction and scheduling of byproduct gas system and discusses some of the factors and opportunities in improving the model. Emerging trends that are likely to influence the current or future byproduct gas prediction and scheduling are also discussed.
Processing Non-Oriented Electrical Steels Using Inclined/Skew Rolling Schemes: Youliang He1; Mehdi Sanjari1; Erik J. Hilinski2; Mehdi Mehdi3; 1Natural Resources Canada; 2Tempel Steel Co.; 3University of Windsor/Canmet Materials
Obtaining the ideal <001>//ND texture in non-oriented electrical steel sheets was the goal of many past investigations. However, it was difficult to achieve the desired texture using conventional rolling techniques. In this research, two unconventional cold rolling schemes (inclined and skew rolling) were proposed and tested: in inclined rolling, the cold rolling direction (CRD) was inclined at an angle (0°-90°) to the hot rolling direction (HRD) so that the initial texture was changed; in skew rolling, the hot band was fed into the rolls at a tilted angle (0°-45°) to the conventional feeding direction so that both the starting texture and the rolling deformation were changed. Non-oriented electrical steels containing 0.9 wt% and 2.8 wt% Si were cold rolled using these schemes, and the textures were measured. It was found that both schemes have considerable effects on the deformation and recrystallization textures.
11:10 AM Invited
A Possible Way for Efficient Utilization of Coal Energy: The Combined Process of Ironmaking with Gasoline Synthesis and Electricity Generation: Zhancheng Guo1; 1University of Science and Technology Beijing
The both of gasoline systhesis process by coal liquidification and electricity generation process by IGCC need to produce coal gas. However, vast coal gas produced in ironmaking has no effective method to utilize. To solve these problems, a combined process of ironmaking with gasoline systhesis and electricity generation was outlined and some preliminary quantified result was obtained in our former work. The integrated system can settle the problem of the utilization of tail gas of ironmaking and the large investment of gasification in IGCC and gasoline systhesis. Taken efficiency, scale and product structure into consideration, the integrated process of ironmaking by full oxygen, gasoline synthesis with coal gas, steam cycle electricity generation with tail gas may be industrialized. Energy efficiency of co-production is up to about 61%, while energy efficiency of divide-production is about 51%.
Waste Energy Recovery Technology of Iron and Steel Industry in China: Xu Zhang1; Hao Bai1; Juxian Hao1; Zhancheng Guo1; 1State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing
In China, many technologies have been applied to improve the energy efficiency of the processes. Among these technologies, the waste energy recovery technology, for example, CDQ (Coke Dry Quenching), CCPP (Combined Cycle Power Plant), waste energy recovery from Linz-Donawitz process, etc. have been used widely and contributed a lot to the energy savings whose application status and energy recovery effect assessment were analyzed in this paper. Further, the technologies of the next generation, aiming to recover the low-grade waste heat, are under development considering the exergy efficiency principle with novel energy conversion methods. Two typical processes under development which are the vertical tank cooling system for sinter sensible heat recovery and the Organic Rankine Cycle (ORC) system to recover the waste heat from blast furnace (BF) slag quenching water for power generation were introduced and their significance and the feasibility were analyzed.