MANUFACTURE OF MEDIUM-LOW CARBON FERROMANGANESE
PURPOSE:To permit the through manufacturing of medium-low carbon ferromangenese from Mn ores, etc., at relatively low temp. at the time of subjecting the molten metal of high Cr ferromanganese by reduction refining to decarburization refining in a reaction vessel by treating it under prescribed proc...
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| creator | SAKURATANI TOSHIKAZU MASUKAWA MASANOBU FUJII TETSUYA KISHIMOTO YASUO KANEKO KENICHI OMORI YASUAKI |
| description | PURPOSE:To permit the through manufacturing of medium-low carbon ferromangenese from Mn ores, etc., at relatively low temp. at the time of subjecting the molten metal of high Cr ferromanganese by reduction refining to decarburization refining in a reaction vessel by treating it under prescribed process-conditions. CONSTITUTION:Mn/Fe of Mn ores at the time of reduction refining is regulated to >=4.5 and the above molten metal contg., by weight, 73 to 81% Mn and =1300 deg.C to blow an oxygen-contg. gas onto the bath face of the molten metal from an upper blowing lance. As for the feeding speed of the above gas, before the bath temp. reaches 1600 deg.C, the heating temp. per metal ton is regulated to >=6.0 deg.C/Nm O2, and during this blowing time, the slag structure is retained to (MnO)/{(MnO)+(CaO)+(SiO2)}>=0.8. When the bath temp. rises to 1600 deg.C or above, the above feeding speed is regulated to |
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CONSTITUTION:Mn/Fe of Mn ores at the time of reduction refining is regulated to >=4.5 and the above molten metal contg., by weight, 73 to 81% Mn and <=0.5% Si is charged into a reaction vessel at >=1300 deg.C to blow an oxygen-contg. gas onto the bath face of the molten metal from an upper blowing lance. As for the feeding speed of the above gas, before the bath temp. reaches 1600 deg.C, the heating temp. per metal ton is regulated to >=6.0 deg.C/Nm O2, and during this blowing time, the slag structure is retained to (MnO)/{(MnO)+(CaO)+(SiO2)}>=0.8. When the bath temp. rises to 1600 deg.C or above, the above feeding speed is regulated to <=2.0Nm /min and the indentation depth of the bath face by the blowing of the above gas is regulated to <=200mm. Furthermore, as the amt. of the slag increses, the upper blowing lance is lowered while the indentation depth is retained to <=200mm and the amt. of a bottom blowing gas is incresed, by which decarburization refining is executed to ferromanganese.</description><language>eng</language><subject>ALLOYS ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1989</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19891221&DB=EPODOC&CC=JP&NR=H01316437A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19891221&DB=EPODOC&CC=JP&NR=H01316437A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SAKURATANI TOSHIKAZU</creatorcontrib><creatorcontrib>MASUKAWA MASANOBU</creatorcontrib><creatorcontrib>FUJII TETSUYA</creatorcontrib><creatorcontrib>KISHIMOTO YASUO</creatorcontrib><creatorcontrib>KANEKO KENICHI</creatorcontrib><creatorcontrib>OMORI YASUAKI</creatorcontrib><title>MANUFACTURE OF MEDIUM-LOW CARBON FERROMANGANESE</title><description>PURPOSE:To permit the through manufacturing of medium-low carbon ferromangenese from Mn ores, etc., at relatively low temp. at the time of subjecting the molten metal of high Cr ferromanganese by reduction refining to decarburization refining in a reaction vessel by treating it under prescribed process-conditions. CONSTITUTION:Mn/Fe of Mn ores at the time of reduction refining is regulated to >=4.5 and the above molten metal contg., by weight, 73 to 81% Mn and <=0.5% Si is charged into a reaction vessel at >=1300 deg.C to blow an oxygen-contg. gas onto the bath face of the molten metal from an upper blowing lance. As for the feeding speed of the above gas, before the bath temp. reaches 1600 deg.C, the heating temp. per metal ton is regulated to >=6.0 deg.C/Nm O2, and during this blowing time, the slag structure is retained to (MnO)/{(MnO)+(CaO)+(SiO2)}>=0.8. When the bath temp. rises to 1600 deg.C or above, the above feeding speed is regulated to <=2.0Nm /min and the indentation depth of the bath face by the blowing of the above gas is regulated to <=200mm. Furthermore, as the amt. of the slag increses, the upper blowing lance is lowered while the indentation depth is retained to <=200mm and the amt. of a bottom blowing gas is incresed, by which decarburization refining is executed to ferromanganese.</description><subject>ALLOYS</subject><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1989</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZND3dfQLdXN0DgkNclXwd1PwdXXxDPXV9fEPV3B2DHLy91Nwcw0K8geqcnf0cw125WFgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8V4BHgaGxoZmJsbmjsbEqAEAEKImPA</recordid><startdate>19891221</startdate><enddate>19891221</enddate><creator>SAKURATANI TOSHIKAZU</creator><creator>MASUKAWA MASANOBU</creator><creator>FUJII TETSUYA</creator><creator>KISHIMOTO YASUO</creator><creator>KANEKO KENICHI</creator><creator>OMORI YASUAKI</creator><scope>EVB</scope></search><sort><creationdate>19891221</creationdate><title>MANUFACTURE OF MEDIUM-LOW CARBON FERROMANGANESE</title><author>SAKURATANI TOSHIKAZU ; MASUKAWA MASANOBU ; FUJII TETSUYA ; KISHIMOTO YASUO ; KANEKO KENICHI ; OMORI YASUAKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH01316437A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1989</creationdate><topic>ALLOYS</topic><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>SAKURATANI TOSHIKAZU</creatorcontrib><creatorcontrib>MASUKAWA MASANOBU</creatorcontrib><creatorcontrib>FUJII TETSUYA</creatorcontrib><creatorcontrib>KISHIMOTO YASUO</creatorcontrib><creatorcontrib>KANEKO KENICHI</creatorcontrib><creatorcontrib>OMORI YASUAKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SAKURATANI TOSHIKAZU</au><au>MASUKAWA MASANOBU</au><au>FUJII TETSUYA</au><au>KISHIMOTO YASUO</au><au>KANEKO KENICHI</au><au>OMORI YASUAKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>MANUFACTURE OF MEDIUM-LOW CARBON FERROMANGANESE</title><date>1989-12-21</date><risdate>1989</risdate><abstract>PURPOSE:To permit the through manufacturing of medium-low carbon ferromangenese from Mn ores, etc., at relatively low temp. at the time of subjecting the molten metal of high Cr ferromanganese by reduction refining to decarburization refining in a reaction vessel by treating it under prescribed process-conditions. CONSTITUTION:Mn/Fe of Mn ores at the time of reduction refining is regulated to >=4.5 and the above molten metal contg., by weight, 73 to 81% Mn and <=0.5% Si is charged into a reaction vessel at >=1300 deg.C to blow an oxygen-contg. gas onto the bath face of the molten metal from an upper blowing lance. As for the feeding speed of the above gas, before the bath temp. reaches 1600 deg.C, the heating temp. per metal ton is regulated to >=6.0 deg.C/Nm O2, and during this blowing time, the slag structure is retained to (MnO)/{(MnO)+(CaO)+(SiO2)}>=0.8. When the bath temp. rises to 1600 deg.C or above, the above feeding speed is regulated to <=2.0Nm /min and the indentation depth of the bath face by the blowing of the above gas is regulated to <=200mm. Furthermore, as the amt. of the slag increses, the upper blowing lance is lowered while the indentation depth is retained to <=200mm and the amt. of a bottom blowing gas is incresed, by which decarburization refining is executed to ferromanganese.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | MANUFACTURE OF MEDIUM-LOW CARBON FERROMANGANESE |
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