BR9917107A - Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation - Google Patents

Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation

Info

Publication number
BR9917107A
BR9917107A BR9917107A BR9917107A BR9917107A BR 9917107 A BR9917107 A BR 9917107A BR 9917107 A BR9917107 A BR 9917107A BR 9917107 A BR9917107 A BR 9917107A BR 9917107 A BR9917107 A BR 9917107A
Authority
BR
Brazil
Prior art keywords
iron ore
fine iron
fluidized bed
decanting
reduction operation
Prior art date
Application number
BR9917107A
Other languages
Portuguese (pt)
Inventor
Heung-Won Kang
Uoo-Chang Chung
Hang-Goo Kim
Sun-Kwang Jeong
Nag-Joon Choi
Albert Zschetzsche
Udo Gennari
Franz Hauzenberger
Original Assignee
Po Hang Iron & Steel
Res Inst Ind Science & Tech
Voest Alpine Ind Anlagen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Po Hang Iron & Steel, Res Inst Ind Science & Tech, Voest Alpine Ind Anlagen filed Critical Po Hang Iron & Steel
Priority to BR9917107A priority Critical patent/BR9917107A/en
Priority claimed from PCT/KR1999/000776 external-priority patent/WO2001044518A1/en
Publication of BR9917107A publication Critical patent/BR9917107A/en

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

Patente de Invenção: "MéTODO PARA REDUçãO DAS PERDAS POR DECANTAçãO DE MINéRIO DE FERRO FINO EM OPERAçãO DE REDUçãO DO TIPO LEITO FLUIDIZADO". é descrito um método para reduzir as perdas por decantação de minério de ferro fino em uma operação de redução do tipo leito fluidizado circulante. O método inclui carregar calcário (CaCO~ 3~)ou dolomita (CaCO~ 3~, MgCO~ 3~) em uma quantidade de 3-6% em volume juntamente com o minério de ferro fino em um forno do tipo leito fluidizado. Em outra representação, o método inclui a adição de uma borra em uma quantidade de 0,2-5% em peso ao minério de ferro fino e misturá-los revestindo assim as partículas de minério de ferro fino; secar as partículas revestidas a uma temperatura de 105-800<198>C por 1-24 horas e então carregar o minério de ferro revestido em um forno do tipo leito fluidizado.Invention Patent: "METHOD FOR REDUCING LOSSES BY DECANTING FINE IRON ORE IN FLUIDIZED BEDDING OPERATION". a method is described to reduce losses by settling fine iron ore in a circulating fluidized bed reduction operation. The method includes loading limestone (CaCO ~ 3 ~) or dolomite (CaCO ~ 3 ~, MgCO ~ 3 ~) in an amount of 3-6% by volume together with the fine iron ore in a fluidized bed oven. In another embodiment, the method includes adding a slurry in an amount of 0.2-5% by weight to the fine iron ore and mixing them thereby coating the fine iron ore particles; dry the coated particles at a temperature of 105-800 <198> C for 1-24 hours and then load the coated iron ore in a fluidized bed oven.

BR9917107A 1999-12-16 1999-12-16 Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation BR9917107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR9917107A BR9917107A (en) 1999-12-16 1999-12-16 Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/KR1999/000776 WO2001044518A1 (en) 1999-12-16 1999-12-16 Method for decreasing elutriation loss of fine iron ore in fluidized bed type reducing operation
BR9917107A BR9917107A (en) 1999-12-16 1999-12-16 Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation

Publications (1)

Publication Number Publication Date
BR9917107A true BR9917107A (en) 2001-11-06

Family

ID=25665459

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9917107A BR9917107A (en) 1999-12-16 1999-12-16 Method for reducing losses by decanting fine iron ore in a fluidized bed reduction operation

Country Status (1)

Country Link
BR (1) BR9917107A (en)

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Legal Events

Date Code Title Description
B06A Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law
B09A Decision: intention to grant
B16A Patent or certificate of addition of invention granted

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/12/1999, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 16A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi; resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2342 DE 24-11-2015 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.