TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE

TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE

PURPOSE:To obtain pellet for charging into a blast furnace having property to be excellently reduced and difficult-to-powder at the time of charging into the blast furnace by sintering at comparatively low temp. after forming the pellet containing iron ore raw material powder as main component and h...

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1. Verfasser: SHIGAKI ICHIRO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator SHIGAKI ICHIRO
description PURPOSE:To obtain pellet for charging into a blast furnace having property to be excellently reduced and difficult-to-powder at the time of charging into the blast furnace by sintering at comparatively low temp. after forming the pellet containing iron ore raw material powder as main component and having the specific basicity. CONSTITUTION:Limestone is blended into fine powdered iron ore, and after kneading and pelletizing by containing suitable moisture, the green pellet is sintered at
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CONSTITUTION:Limestone is blended into fine powdered iron ore, and after kneading and pelletizing by containing suitable moisture, the green pellet is sintered at &lt;=1260 deg.C to obtain the charging pellet. The basicity in the pellet shown with CaO/SiO2 is made to 1.8-2.4. Further, the pellet can be made to two layer structure composing of 1.8-2.4 the basicity at the core part, and 1.2-1.5 the basicity at the outer circumferential part coating the core part. The pellet for charging the blast furnace obtd. with this method does not melt till about 1290 deg.C in the temp. raising process in the blast furnace and the structure developing porosity is obtd. Thus, the reduction stopping is prevented, the property to be reduced is improved, and the charging pellet having the property of difficult-to-power is obtained.</description><language>eng</language><subject>CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; PRETREATMENT OF RAW MATERIALS ; PRODUCTION AND REFINING OF METALS ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1990</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&amp;date=19900320&amp;DB=EPODOC&amp;CC=JP&amp;NR=H0280522A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19900320&amp;DB=EPODOC&amp;CC=JP&amp;NR=H0280522A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SHIGAKI ICHIRO</creatorcontrib><title>TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE</title><description>PURPOSE:To obtain pellet for charging into a blast furnace having property to be excellently reduced and difficult-to-powder at the time of charging into the blast furnace by sintering at comparatively low temp. after forming the pellet containing iron ore raw material powder as main component and having the specific basicity. CONSTITUTION:Limestone is blended into fine powdered iron ore, and after kneading and pelletizing by containing suitable moisture, the green pellet is sintered at &lt;=1260 deg.C to obtain the charging pellet. The basicity in the pellet shown with CaO/SiO2 is made to 1.8-2.4. Further, the pellet can be made to two layer structure composing of 1.8-2.4 the basicity at the core part, and 1.2-1.5 the basicity at the outer circumferential part coating the core part. The pellet for charging the blast furnace obtd. with this method does not melt till about 1290 deg.C in the temp. raising process in the blast furnace and the structure developing porosity is obtd. Thus, the reduction stopping is prevented, the property to be reduced is improved, and the charging pellet having the property of difficult-to-power is obtained.</description><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>PRETREATMENT OF RAW MATERIALS</subject><subject>PRODUCTION AND REFINING OF METALS</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKCfdX8HGMdA1SCA4JCnUOCQ1yVQhw9fFxDVFw8w9ScPZwDHL39HNX8PQL8Vdw8nEMBoqHBvk5OrvyMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ4rwAPAyMLA1MjI0djIpQAAHUQKNM</recordid><startdate>19900320</startdate><enddate>19900320</enddate><creator>SHIGAKI ICHIRO</creator><scope>EVB</scope></search><sort><creationdate>19900320</creationdate><title>TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE</title><author>SHIGAKI ICHIRO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0280522A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1990</creationdate><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>PRETREATMENT OF RAW MATERIALS</topic><topic>PRODUCTION AND REFINING OF METALS</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>SHIGAKI ICHIRO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SHIGAKI ICHIRO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE</title><date>1990-03-20</date><risdate>1990</risdate><abstract>PURPOSE:To obtain pellet for charging into a blast furnace having property to be excellently reduced and difficult-to-powder at the time of charging into the blast furnace by sintering at comparatively low temp. after forming the pellet containing iron ore raw material powder as main component and having the specific basicity. CONSTITUTION:Limestone is blended into fine powdered iron ore, and after kneading and pelletizing by containing suitable moisture, the green pellet is sintered at &lt;=1260 deg.C to obtain the charging pellet. The basicity in the pellet shown with CaO/SiO2 is made to 1.8-2.4. Further, the pellet can be made to two layer structure composing of 1.8-2.4 the basicity at the core part, and 1.2-1.5 the basicity at the outer circumferential part coating the core part. The pellet for charging the blast furnace obtd. with this method does not melt till about 1290 deg.C in the temp. raising process in the blast furnace and the structure developing porosity is obtd. Thus, the reduction stopping is prevented, the property to be reduced is improved, and the charging pellet having the property of difficult-to-power is obtained.</abstract><oa>free_for_read</oa></addata></record>
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title TWO LAYER STRUCTURE PELLET FOR CHARGING INTO BLAST FURNACE
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