Kinetics of solid state silica fluxed reduction of chromite with coal
Solid state reduction of an Australian chromite with black coal and silica addition was studied thermogravimetrically in the temperature range 1000-1400°C under an argon atmosphere. Reduction was found to occur in two stages. In the first stage, reduction is initiated by the nucleation of metallic i...
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| Veröffentlicht in: | Ironmaking & steelmaking 2000-06, Vol.27 (3), p.202-206 |
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| creator | Duong, H.V. Johnston, R.F. |
| description | Solid state reduction of an Australian chromite with black coal and silica addition was studied thermogravimetrically in the temperature range 1000-1400°C under an argon atmosphere. Reduction was found to occur in two stages. In the first stage, reduction is initiated by the nucleation of metallic iron, and the rate is likely to be controlled by the diffusion of cations in the outer zone of the chromite particles. The Zhuravlev-Lesokhin-Tempel'man equation was determined to fit closest to the experimental data, giving an activation energy of 194 kJ mol
-1
. The second stage involves the reduction of chromium, iron, and some silicon ions through the slag. The rate of reduction is proposed to be controlled by dissolution of the chromite into the slag with an activation energy of 256 kJ mol
-1
. Silica addition was found to enhance significantly the rate and degree of reduction at 1300 and 1400°C. |
| doi_str_mv | 10.1179/030192300677499 |
| format | Article |
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-1
. The second stage involves the reduction of chromium, iron, and some silicon ions through the slag. The rate of reduction is proposed to be controlled by dissolution of the chromite into the slag with an activation energy of 256 kJ mol
-1
. Silica addition was found to enhance significantly the rate and degree of reduction at 1300 and 1400°C.</description><identifier>ISSN: 0301-9233</identifier><identifier>EISSN: 1743-2812</identifier><identifier>DOI: 10.1179/030192300677499</identifier><identifier>CODEN: IMKSB7</identifier><language>eng</language><publisher>London, England: Taylor & Francis</publisher><subject>Alloys ; Applied sciences ; Carbon ; Chemical reactions ; Coal ; Direct reduction ; Exact sciences and technology ; Iron and steel making ; Kinetics ; Metallurgy ; Metals. Metallurgy ; Phase transitions ; Production of metals ; Silica ; Silicon ; Studies ; Temperature ; Temperature effects</subject><ispartof>Ironmaking & steelmaking, 2000-06, Vol.27 (3), p.202-206</ispartof><rights>2000 IOM Communications for the Institute of Materials 2000</rights><rights>2000 IOM Communications for the Institute of Materials</rights><rights>2001 INIST-CNRS</rights><rights>Copyright Institute of Materials 2000</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c444t-64ba1fda3dbb7fce0b33a2f9b0d693eeb144c0e0cef462d756d4b1199be67e523</citedby><cites>FETCH-LOGICAL-c444t-64ba1fda3dbb7fce0b33a2f9b0d693eeb144c0e0cef462d756d4b1199be67e523</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1179/030192300677499$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://journals.sagepub.com/doi/10.1179/030192300677499$$EHTML$$P50$$Gsage$$H</linktohtml><link.rule.ids>314,776,780,21798,27901,27902,43597,43598</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=801897$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Duong, H.V.</creatorcontrib><creatorcontrib>Johnston, R.F.</creatorcontrib><title>Kinetics of solid state silica fluxed reduction of chromite with coal</title><title>Ironmaking & steelmaking</title><description>Solid state reduction of an Australian chromite with black coal and silica addition was studied thermogravimetrically in the temperature range 1000-1400°C under an argon atmosphere. Reduction was found to occur in two stages. In the first stage, reduction is initiated by the nucleation of metallic iron, and the rate is likely to be controlled by the diffusion of cations in the outer zone of the chromite particles. The Zhuravlev-Lesokhin-Tempel'man equation was determined to fit closest to the experimental data, giving an activation energy of 194 kJ mol
-1
. The second stage involves the reduction of chromium, iron, and some silicon ions through the slag. The rate of reduction is proposed to be controlled by dissolution of the chromite into the slag with an activation energy of 256 kJ mol
-1
. Silica addition was found to enhance significantly the rate and degree of reduction at 1300 and 1400°C.</description><subject>Alloys</subject><subject>Applied sciences</subject><subject>Carbon</subject><subject>Chemical reactions</subject><subject>Coal</subject><subject>Direct reduction</subject><subject>Exact sciences and technology</subject><subject>Iron and steel making</subject><subject>Kinetics</subject><subject>Metallurgy</subject><subject>Metals. Metallurgy</subject><subject>Phase transitions</subject><subject>Production of metals</subject><subject>Silica</subject><subject>Silicon</subject><subject>Studies</subject><subject>Temperature</subject><subject>Temperature effects</subject><issn>0301-9233</issn><issn>1743-2812</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqFkM1PGzEUxK2KSg20515XIHHqlueP2GtuCNGCGqmX9rzy2s9g5KyDvavAf8-m4UOKFPX0DvObGb0h5CuF75QqfQYcqGYcQColtP5AZlQJXrOGsgMy26j1JPNP5LCUewBQiqkZufoVehyCLVXyVUkxuKoMZsCqhBisqXwcH9FVGd1oh5D6DWbvclqGiVmH4a6yycTP5KM3seCXl3tE_v64-nN5XS9-_7y5vFjUVggx1FJ0hnpnuOs65S1Cx7lhXnfgpOaIHRXCAoJFLyRzai6d6CjVukOpcM74ETnd5q5yehixDO0yFIsxmh7TWFouGsWVlP8FmZrPqdBqAo93wPs05n56omVcCoBGwQSdbSGbUykZfbvKYWnyU0uh3Yzf7ow_OU5eYk2xJvpsehvKm60B2vwr_7alirnF9-L9oedbPPQ-5aVZpxxdO5inmPJrA99nfgb_QqIS</recordid><startdate>200006</startdate><enddate>200006</enddate><creator>Duong, H.V.</creator><creator>Johnston, R.F.</creator><general>Taylor & Francis</general><general>SAGE Publications</general><general>Maney</general><general>Taylor & Francis Ltd</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>0U~</scope><scope>1-H</scope><scope>3V.</scope><scope>7RQ</scope><scope>7WY</scope><scope>7XB</scope><scope>883</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8FL</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BEZIV</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FRNLG</scope><scope>HCIFZ</scope><scope>K60</scope><scope>K6~</scope><scope>KB.</scope><scope>L.-</scope><scope>L.0</scope><scope>M0F</scope><scope>PDBOC</scope><scope>PQBIZ</scope><scope>PQBZA</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PYYUZ</scope><scope>Q9U</scope><scope>U9A</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>200006</creationdate><title>Kinetics of solid state silica fluxed reduction of chromite with coal</title><author>Duong, H.V. ; Johnston, R.F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c444t-64ba1fda3dbb7fce0b33a2f9b0d693eeb144c0e0cef462d756d4b1199be67e523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Alloys</topic><topic>Applied sciences</topic><topic>Carbon</topic><topic>Chemical reactions</topic><topic>Coal</topic><topic>Direct reduction</topic><topic>Exact sciences and technology</topic><topic>Iron and steel making</topic><topic>Kinetics</topic><topic>Metallurgy</topic><topic>Metals. Metallurgy</topic><topic>Phase transitions</topic><topic>Production of metals</topic><topic>Silica</topic><topic>Silicon</topic><topic>Studies</topic><topic>Temperature</topic><topic>Temperature effects</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Duong, H.V.</creatorcontrib><creatorcontrib>Johnston, R.F.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Global News & ABI/Inform Professional</collection><collection>Trade PRO</collection><collection>ProQuest Central (Corporate)</collection><collection>Career & Technical Education Database</collection><collection>ABI-INFORM Complete</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>ABI/INFORM Collection</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ABI/INFORM Collection (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest Business Premium Collection</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central</collection><collection>Business Premium Collection (Alumni)</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Business Collection (Alumni Edition)</collection><collection>ProQuest Business Collection</collection><collection>Materials Science Database</collection><collection>ABI/INFORM Professional Advanced</collection><collection>ABI/INFORM Professional Standard</collection><collection>ProQuest</collection><collection>Materials Science Collection</collection><collection>ProQuest One Business</collection><collection>ProQuest One Business (Alumni)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ABI/INFORM Collection China</collection><collection>ProQuest Central Basic</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Ironmaking & steelmaking</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Duong, H.V.</au><au>Johnston, R.F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Kinetics of solid state silica fluxed reduction of chromite with coal</atitle><jtitle>Ironmaking & steelmaking</jtitle><date>2000-06</date><risdate>2000</risdate><volume>27</volume><issue>3</issue><spage>202</spage><epage>206</epage><pages>202-206</pages><issn>0301-9233</issn><eissn>1743-2812</eissn><coden>IMKSB7</coden><abstract>Solid state reduction of an Australian chromite with black coal and silica addition was studied thermogravimetrically in the temperature range 1000-1400°C under an argon atmosphere. Reduction was found to occur in two stages. In the first stage, reduction is initiated by the nucleation of metallic iron, and the rate is likely to be controlled by the diffusion of cations in the outer zone of the chromite particles. The Zhuravlev-Lesokhin-Tempel'man equation was determined to fit closest to the experimental data, giving an activation energy of 194 kJ mol
-1
. The second stage involves the reduction of chromium, iron, and some silicon ions through the slag. The rate of reduction is proposed to be controlled by dissolution of the chromite into the slag with an activation energy of 256 kJ mol
-1
. Silica addition was found to enhance significantly the rate and degree of reduction at 1300 and 1400°C.</abstract><cop>London, England</cop><pub>Taylor & Francis</pub><doi>10.1179/030192300677499</doi><tpages>5</tpages></addata></record> |
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| source | SAGE Journals |
| subjects | Alloys Applied sciences Carbon Chemical reactions Coal Direct reduction Exact sciences and technology Iron and steel making Kinetics Metallurgy Metals. Metallurgy Phase transitions Production of metals Silica Silicon Studies Temperature Temperature effects |
| title | Kinetics of solid state silica fluxed reduction of chromite with coal |
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