scholarly journals Iranian Steel Industry: Domination of Dispersed Direct Reduction Plants in an Inefficient Value Chain and a Droughty Environment

2021 ◽  
Author(s):  
Sepehr Ghazinoory ◽  
Mehdi Fatemi ◽  
Abolfazl Adab
Keyword(s):  
Value Chain ◽  
Steel Industry ◽  
Material Flow ◽  
Steel Ingot ◽  
Direct Reduction ◽  
Low Cost ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Added Value ◽  
Easy Access

Abstract Iran has a great advantage in the development of the steel industry due to its access to mineral resources and energy, extensive consumer market, and low-cost labor. In this article, the Iranian steel value chain in 2014-2016 is studied using the value chain analysis and material flow analysis. Accordingly, based on the statistics related to the input and output of each echelon in the chain, the material flow is analyzed throughout the value chain. Then the total added value from the chain, the share of different stages, and the various costs in each echelon are calculated. According to the research findings, weakness in the development of transportation infrastructure and poor geographical distribution of value chain units has led to the deviation of production from nominal capacity and frequent imports/exports throughout the chain. On the other hand, the upstream industries have a permanent advantage that deeply roots in easy access to the minerals and lower costs in transportation and energy. Finally, the pricing of intermediate products based on the ratio of steel ingot prices is criticized, while wage conversion and commodity purification contracts are proposed as possible solutions for the reduction of overhead costs.

Control of Material Flow During Friction Stir Welding Between Aluminum and Steel by Welding Tool Shape

2020 ◽  
Author(s):  
Toshiaki Yasui ◽  
Yuki Ogura ◽  
Xu Huilin ◽  
F. Farrah Najwa ◽  
Daichi Sugimoto ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Material Flow ◽  
Simulation Experiment ◽  
Low Cost ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
High Strength ◽  
Friction Stir ◽  
Tool Shape ◽  
Computational Fluid Dynamics Cfd

Abstract For the Friction stir welding (FSW) between aluminum and steel is important to fabricate vehicles with light weight and high strength for safety at low cost. For the fabrication of sound weld, it is necessary to control the material flow during FSW. In this study, the material flow during FSW was elucidated by numerical simulation by computational fluid dynamics (CFD) analysis and simulation experiment by transparent Poly-vinyle chloride (PVC) as simulant of aluminum and tracer material. Based on this material flow analysis, several shapes of welding tool were examined for control of material flow during FSW. Scroll shoulder is effective for enhancement of stirring zone by increasing material velocity around the probe. Flute and fine screw probe promote the material flow in depth and horizontal direction. The welding tool with scroll shoulder and flute and fine screw probe achieved sound weld with highest tensile strength of 120.4 MPa.

scholarly journals Green Development Assessment of a Stainless-steel Industrial Park Based on Material Flow Analysis (MFA)

2021 ◽  
Vol 237 ◽  
pp. 01039
Author(s):  
Zhijie Jia ◽  
Mengfan He ◽  
Junjie Mou ◽  
Geng Ge ◽  
Quanhui Yang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Added Value ◽  
Industrial Park ◽  
Industrial Output ◽  
Particulate Emission ◽  
Development Index ◽  
Green Development

Based on the material flow analysis method, the green development index system of industrial park was constructed. By using the PSR model, 13 indexes were divided into pressure layer, state layer and response layer, the indexes were standardized, weight distribution and synthesis. The green development level of industrial park was divided into 5 grades combined with the pressure state response factors. The results show that the energy consumption per unit industrial output of a stainless-steel industrial park is 0.7116 tons of standard coal per million yuan, the water consumption per unit industrial output is 6.1466 cubic meters per million yuan, the wastewater discharge per unit industrial added value is 3.12 tons per million yuan, the reduction rate of carbon emissions per unit industrial added value is 19.53%, and the green development index is 0.65, which belongs to the third level of green development. The problems are reflected in particulate emission, resource recycling, energy efficiency, industrial structure, and park greening. In the future, the stainless-steel industrial park should focus on industrial restructuring and transformation, environmental protection infrastructure construction, new policy guidance, and ecological environment construction of the park.

scholarly journals Life Cycle Assessment and Material Flow Analysis: Two Under-Utilized Tools for Informing E-Waste Management

2021 ◽  
Vol 13 (14) ◽  
pp. 7939
Author(s):  
Sohani Vihanga Withanage ◽  
Komal Habib
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Material Flow ◽  
Keyword Search ◽  
Technological Development ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Civil Society Organizations ◽  
The Past ◽  
Depth Analysis

The unprecedented technological development and economic growth over the past two decades has resulted in streams of rapidly growing electronic waste (e-waste) around the world. As the potential source of secondary raw materials including precious and critical materials, e-waste has recently gained significant attention across the board, ranging from governments and industry, to academia and civil society organizations. This paper aims to provide a comprehensive review of the last decade of e-waste literature followed by an in-depth analysis of the application of material flow analysis (MFA) and life cycle assessment (LCA), i.e., two less commonly used strategic tools to guide the relevant stakeholders in efficient management of e-waste. Through a keyword search on two main online search databases, Scopus and Web of Science, 1835 peer-reviewed publications were selected and subjected to a bibliographic network analysis to identify and visualize major research themes across the selected literature. The selected 1835 studies were classified into ten different categories based on research area, such as environmental and human health impacts, recycling and recovery technologies, associated social aspects, etc. With this selected literature in mind, the review process revealed the two least explored research areas over the past decade: MFA and LCA with 33 and 31 studies, respectively. A further in-depth analysis was conducted for these two areas regarding their application to various systems with numerous scopes and different stages of e-waste life cycle. The study provides a detailed discussion regarding their applicability, and highlights challenges and opportunities for further research.

Dynamic material flow analysis of natural graphite in China for 2001-2018

2021 ◽  
Vol 173 ◽  
pp. 105732
Author(s):  
Xue Rui ◽  
Yong Geng ◽  
Xin Sun ◽  
Han Hao ◽  
Shijiang Xiao
Keyword(s):  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Natural Graphite

Dynamics of Regional Recycling Economy Development Based on Material Flow Analysis: A Case Study in Shandong Province

2011 ◽  
Vol 347-353 ◽  
pp. 2961-2966
Author(s):  
Dian Ming Geng ◽  
Jia Xiang Liu
Keyword(s):  
Water Supply ◽  
Circular Economy ◽  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Shandong Province ◽  
Utilization Efficiency ◽  
Recycling Economy ◽  
Material Input ◽  
Inputs And Outputs

In order to study the development of regional recycling economy, the material inputs and outputs of the eco-economic system in Shandong Province during the period from 1996 to 2009 were systematically analyzed by the material flow analysis(MFA). The results show that, (1)excluding water, material inputs and outputs rose persistently, but both were lower than the rate of GDP growth. (2)Water supply had a turning point in 2003, from 25.239 billion tons down to 21.934 billion tons, followed by the total annual water supply has been maintained at 220 million tons. At the same time the amount of wastewater emissions is increasing, especially domestic wastewater emissions had faster growth and that increased pressure on the regional water environment;(3) Steady increase in material input intensity, material output intensity presented a first increased and then decreased trend, that showed since Shandong Province proposed the strategic planning to develop circular economy, the development of regional circular economy have improved the material utilization efficiency and made a material reduction in output in the case of material input growth achieved. The rapid increase of material input and output efficiency further illustrated the efficiency of resource comprehensive utilization and waste output have been significantly improved.

Japanese 3R Policies Based on Material Flow Analysis

2008 ◽  
Vol 12 (5-6) ◽  
pp. 792-798 ◽  
Author(s):  
Hiroaki Takiguchi ◽  
Kazuhiko Takemoto
Keyword(s):  
Material Flow ◽  
Flow Analysis ◽  
Material Flow Analysis
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