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 operationInfo
- 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
Links
Landscapes
- 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.
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) |
-
1999
- 1999-12-16 BR BR9917107A patent/BR9917107A/en not_active IP Right Cessation
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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. |
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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. |