Hydrogen Reduction Kinetics of Magnetite Concentrate Particles Relevant to a Novel Flash Ironmaking Process
A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K...
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| Veröffentlicht in: | Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2013-02, Vol.44 (1), p.133-145 |
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| creator | Wang, Haitao Sohn, H. Y. |
| description | A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K (1150 °C to 1400 °C) with the other experimental variables being hydrogen partial pressure and particle size. The nucleation and growth kinetics expression was found to describe the reduction rate of fine concentrate particles and the reduction kinetics had a 1/2-order dependence on hydrogen partial pressure and an activation energy of 463 kJ/mol. Unexpectedly, large concentrate particles reacted faster at 1423 K and 1473 K (1150 °C and 1200 °C), but the effect of particle size was negligible when the reduction temperature was above 1573 K (1300 °C). A complete reaction rate expression incorporating all these factors was formulated. |
| doi_str_mv | 10.1007/s11663-012-9754-z |
| format | Article |
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Y.</creator><creatorcontrib>Wang, Haitao ; Sohn, H. Y.</creatorcontrib><description>A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K (1150 °C to 1400 °C) with the other experimental variables being hydrogen partial pressure and particle size. The nucleation and growth kinetics expression was found to describe the reduction rate of fine concentrate particles and the reduction kinetics had a 1/2-order dependence on hydrogen partial pressure and an activation energy of 463 kJ/mol. Unexpectedly, large concentrate particles reacted faster at 1423 K and 1473 K (1150 °C and 1200 °C), but the effect of particle size was negligible when the reduction temperature was above 1573 K (1300 °C). A complete reaction rate expression incorporating all these factors was formulated.</description><identifier>ISSN: 1073-5615</identifier><identifier>EISSN: 1543-1916</identifier><identifier>DOI: 10.1007/s11663-012-9754-z</identifier><identifier>CODEN: MTTBCR</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Applied sciences ; Atoms & subatomic particles ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Exact sciences and technology ; Hydrogen ; Hydrogen reduction ; Iron ; Kinetics ; Magnetite ; Materials Science ; Metallic Materials ; Metals. Metallurgy ; Nanotechnology ; Nucleation ; Partial pressure ; Process metallurgy ; Production of metals ; Reaction kinetics ; Reduction ; Structural Materials ; Surfaces and Interfaces ; Thin Films ; Transaction processing</subject><ispartof>Metallurgical and materials transactions. 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Y.</creatorcontrib><title>Hydrogen Reduction Kinetics of Magnetite Concentrate Particles Relevant to a Novel Flash Ironmaking Process</title><title>Metallurgical and materials transactions. B, Process metallurgy and materials processing science</title><addtitle>Metall Mater Trans B</addtitle><description>A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K (1150 °C to 1400 °C) with the other experimental variables being hydrogen partial pressure and particle size. The nucleation and growth kinetics expression was found to describe the reduction rate of fine concentrate particles and the reduction kinetics had a 1/2-order dependence on hydrogen partial pressure and an activation energy of 463 kJ/mol. Unexpectedly, large concentrate particles reacted faster at 1423 K and 1473 K (1150 °C and 1200 °C), but the effect of particle size was negligible when the reduction temperature was above 1573 K (1300 °C). A complete reaction rate expression incorporating all these factors was formulated.</description><subject>Applied sciences</subject><subject>Atoms & subatomic particles</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Exact sciences and technology</subject><subject>Hydrogen</subject><subject>Hydrogen reduction</subject><subject>Iron</subject><subject>Kinetics</subject><subject>Magnetite</subject><subject>Materials Science</subject><subject>Metallic Materials</subject><subject>Metals. Metallurgy</subject><subject>Nanotechnology</subject><subject>Nucleation</subject><subject>Partial pressure</subject><subject>Process metallurgy</subject><subject>Production of metals</subject><subject>Reaction kinetics</subject><subject>Reduction</subject><subject>Structural Materials</subject><subject>Surfaces and Interfaces</subject><subject>Thin Films</subject><subject>Transaction processing</subject><issn>1073-5615</issn><issn>1543-1916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kElLBDEQhRtRcP0B3gIieGnNns5RBjdcET2HdDoZW3sSTfUI-uvNMCIieKoq6nuPx6uqXYIPCcbqCAiRktWY0ForwevPlWqDCM5qoolcLTtWrBaSiPVqE-AZYyy1ZhvVy_lHl9PUR3Tvu7kb-xTRZR_92DtAKaBrO10co0eTFJ2PY7Zlv7O5AIOHohr8u40jGhOy6Ca9-wGdDhae0EVOcWZf-jhFdzk5D7BdrQU7gN_5nlvV4-nJw-S8vro9u5gcX9WON3Ssu44T2WAceIuDDVxJqgUWrdJKs0axriVYBkY1o00rutAKTCX1nRUNpbajbKs6WPq-5vQ29zCaWQ_OD4ONPs3BEE51I3jxLOjeH_Q5zXMs6QyhjdSMM9YUiiwplxNA9sG85n5m84ch2CzqN8v6TanfLOo3n0Wz_-1swdkhZBtdDz9CqiihUrHC0SUH5RWnPv9K8K_5F_gElMk</recordid><startdate>20130201</startdate><enddate>20130201</enddate><creator>Wang, Haitao</creator><creator>Sohn, H. 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B, Process metallurgy and materials processing science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Haitao</au><au>Sohn, H. Y.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydrogen Reduction Kinetics of Magnetite Concentrate Particles Relevant to a Novel Flash Ironmaking Process</atitle><jtitle>Metallurgical and materials transactions. B, Process metallurgy and materials processing science</jtitle><stitle>Metall Mater Trans B</stitle><date>2013-02-01</date><risdate>2013</risdate><volume>44</volume><issue>1</issue><spage>133</spage><epage>145</epage><pages>133-145</pages><issn>1073-5615</issn><eissn>1543-1916</eissn><coden>MTTBCR</coden><abstract>A novel ironmaking technology is under development at the University of Utah. The purpose of this research was to determine comprehensive kinetics of the flash reduction reaction of magnetite concentrate particles by hydrogen. Experiments were carried out in the temperature range of 1423 K to 1673 K (1150 °C to 1400 °C) with the other experimental variables being hydrogen partial pressure and particle size. The nucleation and growth kinetics expression was found to describe the reduction rate of fine concentrate particles and the reduction kinetics had a 1/2-order dependence on hydrogen partial pressure and an activation energy of 463 kJ/mol. Unexpectedly, large concentrate particles reacted faster at 1423 K and 1473 K (1150 °C and 1200 °C), but the effect of particle size was negligible when the reduction temperature was above 1573 K (1300 °C). A complete reaction rate expression incorporating all these factors was formulated.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s11663-012-9754-z</doi><tpages>13</tpages></addata></record> |
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| subjects | Applied sciences Atoms & subatomic particles Characterization and Evaluation of Materials Chemistry and Materials Science Exact sciences and technology Hydrogen Hydrogen reduction Iron Kinetics Magnetite Materials Science Metallic Materials Metals. Metallurgy Nanotechnology Nucleation Partial pressure Process metallurgy Production of metals Reaction kinetics Reduction Structural Materials Surfaces and Interfaces Thin Films Transaction processing |
| title | Hydrogen Reduction Kinetics of Magnetite Concentrate Particles Relevant to a Novel Flash Ironmaking Process |
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