Analysis of China's Iron Trade Flow: Quantity, Value and Regional Pattern
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Ferroalloy Quality for Electric Steelmaking with Nonmetallic Inclusion Control
Electrometallurgy UDC 669.168/.785:539.219.1 Ferroalloy Quality for Electric Steelmaking with Nonmetallic Inclusion Control 1 2 2 Gasik M. I. , Panchenko A. I. , Sal`nikov A. S. 1National Metallurgical Academy of Ukraine 4 Gagarin Ave., Dnipropetrovsk, 49600, Ukraine 2JSC “Dneprospetsstal” 81Yuzhnoe Shosse, Zaporizhzhya, 69008, Ukraine Data about quality of ferroalloys used for electric steelmaking and alloys with special properties controlled by specified nonmetallic inclusions according to GOST 801-78 and ASTM E-45 (method A) are generalized and analyzed. Results of investigation of matrix and proeutectoid phases in the structure of industrial carbonaceous ferrochromium with application of electron microscopy and electron probe microanalysis as the main alloying ferroalloy at roller-bearing steel ШХ15СГ-В smelting are presented. Keywords: FERROALLOYS, STANDARDS, MICROSTRUCTURE, MATRIX AND PROEUTECTOID PHASES, NONFERROUS IMPURITY METALS, CARBONACEOUS FERROCHROMIUM, ELECTRON MICROSCOPY, ELECTRON PROBE MICROANALYSIS, NONMETALLIC SILICATE AND SPINDEL INCLUSIONS Introduction Large-scale development and further implementation of electric arc furnaces of large The complex of strength, plastic, anticorrosive unit capacity with electric steel smelting of mass and other properties of alloyed electric steel and application with equipping shops by ladle-furnaces special purpose alloys is defined in many respects and vacuum vessels unedged attention of steel by proeutectoid precipitated phases of endogenetic producers to the important issue of using high origin (oxides, nitrides, sulfides, phosphides) and quality ferroalloys. It is necessary to mention that also impurity non-ferrous metals in the structure of there are companies producing ferroalloys with the rolled (cast) metal. During formation and use of secondary raw materials along with development of electric furnace steelmaking ferroalloy production plants. -
Development of Ni-Free Mn-Stabilised Maraging Steels Using Fe2siti Precipitates
This is a repository copy of Development of Ni-free Mn-stabilised maraging steels using Fe2SiTi precipitates. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/146857/ Version: Accepted Version Article: Knowles, A.J., Gong, P., Rahman, K.M. et al. (3 more authors) (2019) Development of Ni-free Mn-stabilised maraging steels using Fe2SiTi precipitates. Acta Materialia. ISSN 1359-6454 https://doi.org/10.1016/j.actamat.2019.05.034 Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). Reuse This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can’t change the article in any way or use it commercially. More information and the full terms of the licence here: https://creativecommons.org/licenses/ Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ Accepted Manuscript Development of Ni-free Mn-stabilised maraging steels using Fe2SiTi precipitates Alexander.J. Knowles, Peng Gong, Khandaker.M. Rahman, W.Mark Rainforth, David Dye, Enrique.I. Galindo-Nava PII: S1359-6454(19)30318-0 DOI: https://doi.org/10.1016/j.actamat.2019.05.034 Reference: AM 15306 To appear in: Acta Materialia Received Date: 24 January 2019 Revised Date: 8 May 2019 Accepted Date: 16 May 2019 Please cite this article as: A.J Knowles, P. -
The Efficient Improvement of Original Magnetite in Iron Ore Reduction
minerals Article The Efficient Improvement of Original Magnetite in Iron Ore Reduction Reaction in Magnetization Roasting Process and Mechanism Analysis by In Situ and Continuous Image Capture Bing Zhao 1,2, Peng Gao 1,2,*, Zhidong Tang 1,2 and Wuzhi Zhang 1,2 1 School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; [email protected] (B.Z.); [email protected] (Z.T.); [email protected] (W.Z.) 2 National-Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources, Shenyang 110819, China * Correspondence: [email protected]; Tel.: +86-024-8368-8920 Abstract: Magnetization roasting followed by magnetic separation is considered an effective method for recovering iron minerals. As hematite and magnetite are the main concomitant constituents in iron ores, the separation index after the magnetization roasting will be more optimized than with only hematite. In this research, the mechanism of the original magnetite improving iron ore reduction during the magnetization roasting process was explored using ore fines and lump ore samples. Under optimum roasting conditions, the iron grade increased from 62.17% to 65.22%, and iron recovery increased from 84.02% to 92.02% after separation, when Fe in the original magnetite content increased from 0.31% to 8.09%, although the Fe masses in each sample were equal. For lump ores with magnetite and hematite intergrowth, the method of in situ and continuous image capture Citation: Zhao, B.; Gao, P.; Tang, Z.; for microcrack generation and the evolution of the magnetization roasting process was innovatively Zhang, W. -
Recovery of Magnetite-Hematite Concentrate from Iron Ore Tailings
E3S Web of Conferences 247, 01042 (2021) https://doi.org/10.1051/e3sconf/202124701042 ICEPP-2021 Recovery of magnetite-hematite concentrate from iron ore tailings Mikhail Khokhulya1,*, Alexander Fomin1, and Svetlana Alekseeva1 1Mining Institute of Kola Science Center of Russian Academy of Sciences, Apatity, 184209, Russia Abstract. The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet includes magnetic separation, milling and gravity concentration methods. The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% of total iron. The proposed technology will increase production of the concentrate at a dressing plant and reduce environmental impact. 1 Introduction The mineral processing plant of the Olcon JSC, located at the Murmansk region, produces magnetite- At present, there is an important problem worldwide in hematite concentrate. The processing technology the disposal of waste generated during the mineral includes several magnetic separation stages to produce production and processing. Tailings dumps occupy huge magnetite concentrate and two jigging stages to produce areas and pollute the environment. However, waste hematite concentrate from a non-magnetic fraction of material contains some valuable components that can be magnetic separation [13]. used in various industries. In the initial period of plant operation (since 1955) In Russia, mining-induced waste occupies more than iron ore tailings were stored in the Southern Bay of 300 thousand hectares of lands. -
Banded Iron Formations
Banded Iron Formations Cover Slide 1 What are Banded Iron Formations (BIFs)? • Large sedimentary structures Kalmina gorge banded iron (Gypsy Denise 2013, Creative Commons) BIFs were deposited in shallow marine troughs or basins. Deposits are tens of km long, several km wide and 150 – 600 m thick. Photo is of Kalmina gorge in the Pilbara (Karijini National Park, Hamersley Ranges) 2 What are Banded Iron Formations (BIFs)? • Large sedimentary structures • Bands of iron rich and iron poor rock Iron rich bands: hematite (Fe2O3), magnetite (Fe3O4), siderite (FeCO3) or pyrite (FeS2). Iron poor bands: chert (fine‐grained quartz) and low iron oxide levels Rock sample from a BIF (Woudloper 2009, Creative Commons 1.0) Iron rich bands are composed of hematitie (Fe2O3), magnetite (Fe3O4), siderite (FeCO3) or pyrite (FeS2). The iron poor bands contain chert (fine‐grained quartz) with lesser amounts of iron oxide. 3 What are Banded Iron Formations (BIFs)? • Large sedimentary structures • Bands of iron rich and iron poor rock • Archaean and Proterozoic in age BIF formation through time (KG Budge 2020, public domain) BIFs were deposited for 2 billion years during the Archaean and Proterozoic. There was another short time of deposition during a Snowball Earth event. 4 Why are BIFs important? • Iron ore exports are Australia’s top earner, worth $61 billion in 2017‐2018 • Iron ore comes from enriched BIF deposits Rio Tinto iron ore shiploader in the Pilbara (C Hargrave, CSIRO Science Image) Australia is consistently the leading iron ore exporter in the world. We have large deposits where the iron‐poor chert bands have been leached away, leaving 40%‐60% iron. -
Smelting Iron from Laterite: Technical Possibility Or Ethnographic Aberration?
Smelting Iron from Laterite: Technical Possibility or Ethnographic Aberration? T. O. PRYCE AND S. NATAPINTU introduction Laterites deposits (orlateriticsoilsastheyarealsocalled)arefrequently reported in Southeast Asia, and are ethnographically attested to have been used for the smelting of iron in the region (Abendanon 1917 in Bronson 1992:73; Bronson and Charoenwongsa 1986), as well as in Africa (Gordon and Killick 1993; Miller and Van Der Merwe 1994). The present authors do not dispute this evidence; we merely wish to counsel cautioninitsextrapolation.Modifyingour understanding of a population’s potential to locally produce their own iron has immediate ramifications for how we reconstruct ancient metal distribution net- works, and the social exchanges that have facilitated them since iron’s generally agreed appearance in Southeast Asian archaeological contexts during the mid-first millennium b.c. (e.g., Bellwood 2007:268; Higham 1989:190). We present this paper as a wholly constructive critique of what appears to be a prevailingperspectiveonpre-modernSoutheastAsianironmetallurgy.Wehave tried to avoid technical language and jargon wherever possible, as our aim is to motivate scholars working within the regiontogivefurtherconsiderationtoiron as a metal, as a technology, and as a socially significant medium (e.g., Appadurai 1998; Binsbergen 2005; Gosden and Marshall 1999). When writing a critique it is of course necessary to cite researchers with whom one disagrees, and we have done this with full acknowledgment that in modern archaeology no one person can encompass the entire knowledge spectrum of the discipline.1 The archaeome- tallurgy of iron is probably on the periphery of most of our colleagues’ interests, but sometimes, within the technical, lies the pivotal, and in sharing some of our insights we hope to illuminate issues of benefit to all researchers in Metal Age Southeast Asia. -
ITP Mining: Energy and Environmental Profile of the U.S. Mining Industry: Chapter 4: Iron
Energy and Environmental Profile of the U.S. Mining Industry 4 Iron The chemical element iron is the fourth most common element in the Earth's crust and the second most abundant metal. About five percent of the Earth's crust is composed of iron. The metal is chemically active and is found in nature combined with other elements in rocks and soils. In its natural state, iron is chemically bonded with oxygen, water, carbon dioxide, or sulfur in a variety of minerals. Forms of Iron Minerals, Ores, and Rocks Iron occurs mainly in iron-oxide ores. Some ores are a mixture of minerals rich in iron. Other iron ores are less rich and have a large number of impurities. The most important iron ore- forming minerals are: • Magnetite - Magnetite (Fe3O4) forms magnetic black iron ore. There are large deposits of magnetite in Russia and Sweden. • Hematite - Hematite (Fe2O3) is a red iron ore. Hematite occurs in almost all forms, from solid rock to loose earth. It is the most plentiful iron ore and occurs in large quantities throughout the world. • Goethite - Goethite (Fe2O3.H2O), a brown ore, contains iron. • Limonite - Limonite (Fe2O3.H2O) is a yellow-brown iron ore. Limonite is a collective term for impure goethite and a mixture of hydrated iron oxides. Iron 4-1 Energy and Environmental Profile of the U.S. Mining Industry Taconite contains low-grade iron in fine specks and bands. It is an extremely hard and flinty - containing about 25 - 30 percent iron. The iron in taconite occurs principally as magnetite and hematite and finely dispersed with silica in sedimentary deposits. -
EMEP/EEA Air Pollutant Emission Inventory Guidebook 2019 1
Category Title NFR 2.C.2 Ferroalloys production SNAP 040302 Ferroalloys ISIC Version Guidebook 2019 Coordinator Jeroen Kuenen EMEP/EEA air pollutant emission inventory guidebook 2019 1 2.C.2 Ferroalloys production Contents 1 Overview .......................................................................................................... 3 2 Description of sources .................................................................................... 3 2.1 Process description ...................................................................................................................... 3 2.2 Techniques .................................................................................................................................... 3 2.3 Emissions and controls ............................................................................................................... 4 3 Methods............................................................................................................ 6 3.1 Choice of method ......................................................................................................................... 6 3.2 Tier 1 default approach ............................................................................................................... 6 3.3 Tier 2 technology-specific approach .......................................................................................... 7 3.4 Tier 3 emission modelling and use of facility data ................................................................... 8 4 Data -
Conservation and Systematic Development of Iron
1 PART : II INTRODUCTION CONSERVATION (PRESERVATION) AND SYSTEMATIC DEVELOPMENT OF IRON ORE One of the species of National Wealth is iron ore. Conservation of this mineral is of prime importance for industrial development. Indian legislature has recognized it in Section: 18 of the Mines & Minerals (Development & Regulation) Act, 1957. Section : 18, inter-alia, directs the Central Government to take all such steps as may be necessary for: (a) the conservation (Preservation) (b) and systematic development of minerals in India Systematic development of minerals in India would require: (a) exact estimate of reserves available (b) reasonable estimate of resources from where probable reserves can be estimated. This, inter–alia, would require opening of new mines. For that purpose, exploration is necessary. 2 For this, it would be worthwhile to refer to: A (REPORTS FOR EXPLORATION) (i) DOCUMENT ON STRATEGY FOR EXPLORATION, EXPLOITATION AND DEVELOPMENT FOR IRON ORE IN INDIA, PUBLISHED BY THE SUB–GROUP ON IRON ORE in India (January, 2006) (ii) MINERAL POLICY ISSUES IN THE CONTEXT OF EXPORT AND DOMESTIC USE OF IRON ORE IN INDIA - REPORT - FEBRUARY 2008 (INDIAN COUNCIL FOR RESEARCH ON INTERNATIONAL ECONOMIC RELATIONS) (iii) ECONOMICS OF SPONGE IRON AND STEEL PRODUCTION (SEPTEMBER, 2008) BY STEEL AND NATURAL RESOURCES STRATEGY RESEARCH, VASANT KUNJ, NEW DELHI (iv) IRON ORE – STATUS AND FUTURE PROSPECTS” by M. S. Jairam, Director, Geological Survey of India (v) IBM REPORT, 2009, AND PROVISIONAL FIGURES, AS ON 1-4-2010, SUPPLIED BY IBM, FOR IRON ORE 3 B (ILLEGAL MINING) (vi) 19TH REPORT OF STANDING COMMITTEE ON COAL & STEEL which highlights menace of illegal mining. -
Critical Evaluation and Thermodynamic Modeling of High Alloy Fe-Mn-Al-Si-C-P System
Critical Evaluation and Thermodynamic Modeling of High Alloy Fe-Mn-Al-Si-C-P System Zhimin You Department of Mining and Materials Engineering McGill University, Montreal, Quebec, Canada August 2020 A thesis submitted to McGill University in partial fulfilment of the requirements of the degree of Doctorate of Philosophy ©Zhimin You, 2020 Dedication To my parents, my brother, and my sister in China Tables of Content Abstract .......................................................................................................................................... 6 Résumé ........................................................................................................................................... 8 Acknowledgements ..................................................................................................................... 10 Preface and Contributions of Authors ...................................................................................... 12 List of Figures .............................................................................................................................. 14 List of Tables ............................................................................................................................... 20 List of Abbreviations and Symbols ........................................................................................... 22 Chapter 1: Introduction ............................................................................................................. 26 1.1 Background ........................................................................................................................ -
Obtainment of Sorbitol on Ferroalloy Promoted Nickel Catalysts Kedelbaev BS*, Korazbekova KU and Kudasova DE M
cie al S nce ri s Kedelbaev et al., J Material Sci Eng 2016, 5:2 te & a E DOI: 10.4172/2169-0022.1000224 M n f g i o n l e a e n r r i n u g o Journal of Material Science & Engineering J ISSN: 2169-0022 Research Article Article OpenOpen Access Access Obtainment of Sorbitol on Ferroalloy Promoted Nickel Catalysts Kedelbaev BS*, Korazbekova KU and Kudasova DE M. Auezov South Kazakhstan State University, Kazakhstan Abstract The systematic study of the activity of the catalyst suspended with ferroalloys additives in catalytic hydrogenation of glucose over a wide variation of process parameters is given in this article. Since nickel catalysts were studied sufficiently, we limited to the data of the phase composition and structure; specific surface of alloys and catalysts based on aluminum-nickel alloys, modified ferroalloys. Results of the study of phase, chemical, particle size distribution and structure of nickel alloys and catalysts have shown that modifying metals affect to the ratio of NiAl3/Ni2Al3 in the alloys, crush crystals, increase catalyst particle size, surface area and large size pore volume and simultaneously increase the micro- and supermicro pore ratio. Highly active, stable and selective catalysts based on nickel for the sorbitol synthesis process was developed. Keywords: Catalysts; Nickel; Autoclave; Hydrogenation; Glucose; As a result of the exothermic reaction, the melting temperature was Sorbitol; Physico-chemical properties; Ferroalloys; Kinetics raised to 1700-1800°С, stirring by the induction field was lasted 3-5 min. The alloy was air-cooled in the graphite molds and was crushed to Introduction grains of 0.25 mm. -
Charcoal As an Alternative Reductant in Ferroalloy Production: a Review
processes Review Charcoal as an Alternative Reductant in Ferroalloy Production: A Review Gerrit Ralf Surup 1,*, Anna Trubetskaya 2 and Merete Tangstad 1 1 Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway; [email protected] 2 Department of Chemical Sciences, University of Limerick, V94 T9PX Castletroy, Ireland; [email protected] * Correspondence: [email protected]; Tel.: +47-934-73-184 Received: 12 October 2020; Accepted: 3 November 2020; Published: 9 November 2020 Abstract: This paper provides a fundamental and critical review of biomass application as renewable reductant in integrated ferroalloy reduction process. The basis for the review is based on the current process and product quality requirement that bio-based reductants must fulfill. The characteristics of different feedstocks and suitable pre-treatment and post-treatment technologies for their upgrading are evaluated. The existing literature concerning biomass application in ferroalloy industries is reviewed to fill out the research gaps related to charcoal properties provided by current production technologies and the integration of renewable reductants in the existing industrial infrastructure. This review also provides insights and recommendations to the unresolved challenges related to the charcoal process economics. Several possibilities to integrate the production of bio-based reductants with bio-refineries to lower the cost and increase the total efficiency are given. A comparison of challenges related to energy efficient charcoal production and formation of emissions in classical kiln technologies are discussed to underline the potential of bio-based reductant usage in ferroalloy reduction process. Keywords: charcoal; pyrolysis; bio-based reductant; ferroalloy industry; kiln 1.