Attrition characteristics of iron ore by an air jet in gas-solid fluidized beds
The effects of superficial gas velocity (Ug=1.25–3.00m/s) and distributor hole size (8.0–12.4mm) on the attrition rate of iron ore in a gas-solid fluidized bed with 0.076m ID×3.7m height with or without solid circulation have been determined. The particle density and the Sauter mean diameter of fres...
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| Veröffentlicht in: | Powder technology 2017-07, Vol.316, p.69-78 |
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| creator | Kang, Dong Hyun Ko, Chang Kuk Lee, Dong Hyun |
| description | The effects of superficial gas velocity (Ug=1.25–3.00m/s) and distributor hole size (8.0–12.4mm) on the attrition rate of iron ore in a gas-solid fluidized bed with 0.076m ID×3.7m height with or without solid circulation have been determined. The particle density and the Sauter mean diameter of fresh iron ore were 3705kg/m3 and 357μm, respectively. When the kinetic energy rate from the orifice was equal or >180J/s, we could determine an attrition rate trend by measuring the fractional mass of fine particle formation (under 500μm fraction) during 30min without solids circulation. In the experiments with solids circulation, the attrition rate was determined by measuring the fractional mass of fine particle formation (under 63μm fraction; variation of threshold size). The attrition rate increases with increasing kinetic energy rate from the orifice (180J/s |
| doi_str_mv | 10.1016/j.powtec.2016.12.092 |
| format | Article |
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[Display omitted]
•Threshold size of attrition fines was used to determine attrition rates.•Experiments were conducted with or without solids circulation.•Correlation of attrition rate with the kinetic energy rate was derived.</description><identifier>ISSN: 0032-5910</identifier><identifier>EISSN: 1873-328X</identifier><identifier>DOI: 10.1016/j.powtec.2016.12.092</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Attrition ; Flow rates ; Flow velocity ; Fluidized bed reactors ; Fluidized beds ; Fragmentation ; Grid jet ; Hole size ; Iron ; Iron ore ; Kinetic energy ; Kinetic energy rate ; Kinetics ; Mass flow rate ; Particle density (concentration) ; Sauter mean diameter ; Solids ; Studies</subject><ispartof>Powder technology, 2017-07, Vol.316, p.69-78</ispartof><rights>2017 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jul 1, 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c371t-9838e3e1eda725ce380b30c16cf6824bf93db6f4d8a385f64bf09b3ef29dcdd33</citedby><cites>FETCH-LOGICAL-c371t-9838e3e1eda725ce380b30c16cf6824bf93db6f4d8a385f64bf09b3ef29dcdd33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.powtec.2016.12.092$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3549,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Kang, Dong Hyun</creatorcontrib><creatorcontrib>Ko, Chang Kuk</creatorcontrib><creatorcontrib>Lee, Dong Hyun</creatorcontrib><title>Attrition characteristics of iron ore by an air jet in gas-solid fluidized beds</title><title>Powder technology</title><description>The effects of superficial gas velocity (Ug=1.25–3.00m/s) and distributor hole size (8.0–12.4mm) on the attrition rate of iron ore in a gas-solid fluidized bed with 0.076m ID×3.7m height with or without solid circulation have been determined. The particle density and the Sauter mean diameter of fresh iron ore were 3705kg/m3 and 357μm, respectively. When the kinetic energy rate from the orifice was equal or >180J/s, we could determine an attrition rate trend by measuring the fractional mass of fine particle formation (under 500μm fraction) during 30min without solids circulation. In the experiments with solids circulation, the attrition rate was determined by measuring the fractional mass of fine particle formation (under 63μm fraction; variation of threshold size). The attrition rate increases with increasing kinetic energy rate from the orifice (180J/s<EK<608J/s). The kinetic energy rate from the orifice was calculated using the mass flow rate and orifice nozzle velocity. The correlation of the attrition rate with the kinetic energy rate from the orifice isΦ/N=0.1214EK−1.3587 above the jet length.
[Display omitted]
•Threshold size of attrition fines was used to determine attrition rates.•Experiments were conducted with or without solids circulation.•Correlation of attrition rate with the kinetic energy rate was derived.</description><subject>Attrition</subject><subject>Flow rates</subject><subject>Flow velocity</subject><subject>Fluidized bed reactors</subject><subject>Fluidized beds</subject><subject>Fragmentation</subject><subject>Grid jet</subject><subject>Hole size</subject><subject>Iron</subject><subject>Iron ore</subject><subject>Kinetic energy</subject><subject>Kinetic energy rate</subject><subject>Kinetics</subject><subject>Mass flow rate</subject><subject>Particle density (concentration)</subject><subject>Sauter mean diameter</subject><subject>Solids</subject><subject>Studies</subject><issn>0032-5910</issn><issn>1873-328X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kM1LxDAQxYMouH78Bx4CnlsnSbdNL8Ky-AULe1HwFtJkoilrsyZZZf3r7VLPnoZ5vPeG-RFyxaBkwOqbvtyG74ym5ONWMl5Cy4_IjMlGFILL12MyAxC8mLcMTslZSj0A1ILBjKwXOUeffRioeddRm4zRp-xNosFRH0c9RKTdnuqBah9pj5n6gb7pVKSw8Za6zc5b_4OWdmjTBTlxepPw8m-ek5f7u-flY7FaPzwtF6vCiIblopVCokCGVjd8blBI6AQYVhtXS151rhW2q11lpRZy7upRgbYT6HhrjbVCnJPrqXcbw-cOU1Z92MVhPKlYWzUgK1nB6Koml4khpYhObaP_0HGvGKgDOtWrCZ06oFOMqxHdGLudYjh-8OUxqmQ8Dgatj2iyssH_X_AL7kN6AA</recordid><startdate>20170701</startdate><enddate>20170701</enddate><creator>Kang, Dong Hyun</creator><creator>Ko, Chang Kuk</creator><creator>Lee, Dong Hyun</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7ST</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>JG9</scope><scope>SOI</scope></search><sort><creationdate>20170701</creationdate><title>Attrition characteristics of iron ore by an air jet in gas-solid fluidized beds</title><author>Kang, Dong Hyun ; Ko, Chang Kuk ; Lee, Dong Hyun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-9838e3e1eda725ce380b30c16cf6824bf93db6f4d8a385f64bf09b3ef29dcdd33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Attrition</topic><topic>Flow rates</topic><topic>Flow velocity</topic><topic>Fluidized bed reactors</topic><topic>Fluidized beds</topic><topic>Fragmentation</topic><topic>Grid jet</topic><topic>Hole size</topic><topic>Iron</topic><topic>Iron ore</topic><topic>Kinetic energy</topic><topic>Kinetic energy rate</topic><topic>Kinetics</topic><topic>Mass flow rate</topic><topic>Particle density (concentration)</topic><topic>Sauter mean diameter</topic><topic>Solids</topic><topic>Studies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kang, Dong Hyun</creatorcontrib><creatorcontrib>Ko, Chang Kuk</creatorcontrib><creatorcontrib>Lee, Dong Hyun</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environment Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Materials Research Database</collection><collection>Environment Abstracts</collection><jtitle>Powder technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kang, Dong Hyun</au><au>Ko, Chang Kuk</au><au>Lee, Dong Hyun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Attrition characteristics of iron ore by an air jet in gas-solid fluidized beds</atitle><jtitle>Powder technology</jtitle><date>2017-07-01</date><risdate>2017</risdate><volume>316</volume><spage>69</spage><epage>78</epage><pages>69-78</pages><issn>0032-5910</issn><eissn>1873-328X</eissn><abstract>The effects of superficial gas velocity (Ug=1.25–3.00m/s) and distributor hole size (8.0–12.4mm) on the attrition rate of iron ore in a gas-solid fluidized bed with 0.076m ID×3.7m height with or without solid circulation have been determined. The particle density and the Sauter mean diameter of fresh iron ore were 3705kg/m3 and 357μm, respectively. When the kinetic energy rate from the orifice was equal or >180J/s, we could determine an attrition rate trend by measuring the fractional mass of fine particle formation (under 500μm fraction) during 30min without solids circulation. In the experiments with solids circulation, the attrition rate was determined by measuring the fractional mass of fine particle formation (under 63μm fraction; variation of threshold size). The attrition rate increases with increasing kinetic energy rate from the orifice (180J/s<EK<608J/s). The kinetic energy rate from the orifice was calculated using the mass flow rate and orifice nozzle velocity. The correlation of the attrition rate with the kinetic energy rate from the orifice isΦ/N=0.1214EK−1.3587 above the jet length.
[Display omitted]
•Threshold size of attrition fines was used to determine attrition rates.•Experiments were conducted with or without solids circulation.•Correlation of attrition rate with the kinetic energy rate was derived.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.powtec.2016.12.092</doi><tpages>10</tpages></addata></record> |
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| ispartof | Powder technology, 2017-07, Vol.316, p.69-78 |
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| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Attrition Flow rates Flow velocity Fluidized bed reactors Fluidized beds Fragmentation Grid jet Hole size Iron Iron ore Kinetic energy Kinetic energy rate Kinetics Mass flow rate Particle density (concentration) Sauter mean diameter Solids Studies |
| title | Attrition characteristics of iron ore by an air jet in gas-solid fluidized beds |
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