BR112019000977A2 - method for improving an iron content of iron ore. - Google Patents

method for improving an iron content of iron ore.

Info

Publication number
BR112019000977A2
BR112019000977A2 BR112019000977-9A BR112019000977A BR112019000977A2 BR 112019000977 A2 BR112019000977 A2 BR 112019000977A2 BR 112019000977 A BR112019000977 A BR 112019000977A BR 112019000977 A2 BR112019000977 A2 BR 112019000977A2
Authority
BR
Brazil
Prior art keywords
iron ore
iron
improving
reducing gas
content
Prior art date
Application number
BR112019000977-9A
Other languages
Portuguese (pt)
Inventor
Tsushima Takashi
Adachi Takero
Shimamoto Masaki
Deura Tetsushi
Maki Takeshi
Original Assignee
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
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
Priority claimed from JP2016141172A external-priority patent/JP2018012850A/en
Priority claimed from JP2016141171A external-priority patent/JP2018012849A/en
Application filed by Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) filed Critical Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
Publication of BR112019000977A2 publication Critical patent/BR112019000977A2/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/04—Blast roasting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

método para melhorar um teor de ferro de minério de ferro é provido um método para melhorar o teor de ferro do minério de ferro, dito método permitindo a melhora do teor de ferro removendo eficientemente ganga incluída no minério de ferro e permitindo que o minério de ferro tenha uma forma que é facilmente usável como uma matéria prima na fabricação de ferro. a presente invenção é um método para melhorar o teor de ferro do minério de ferro moendo minério de ferro contendo ganga que foi reduzido usando um gás de redução e então removendo a ganga por separação magnética, em que: dita redução é controlada de modo que o parâmetro x representado por uma função do tempo de redução para o minério de ferro e as pressões parciais do gás de redução satisfaça [x= t x (ph2+0,3 x pco) = 5], onde t é o tempo de redução [min] para o minério de ferro, ph2 é a pressão parcial de h2 [atm] do gás de redução, e pco é a pressão parcial de co [atm] do gás de redução; ou, um minério de ferro com uma perda de ig = 10% em peso é reduzido usando gás h2 de modo que a razão de metalização seja = 60% em peso e, após moer, de modo que as partículas moídas tenham um diâmetro de não mais do que 2mm e d50 = 100µm, passe por separação magnética.A method for improving an iron ore iron content A method for improving the iron ore iron content is provided, said method allowing the improvement of the iron content by efficiently removing gangue included in the iron ore and allowing the iron ore have a shape that is easily usable as a raw material in iron making. The present invention is a method for improving the iron content of the iron ore by grinding gangue-containing iron ore that has been reduced using a reducing gas and then removing the gangue by magnetic separation, wherein: said reduction is controlled such that parameter x represented by a function of the reduction time for iron ore and the reducing gas partial pressures satisfies [x = tx (ph2 + 0.3 x pco) = 5], where t is the reduction time [min ] for iron ore, ph2 is the partial pressure of h2 [atm] of the reducing gas, and pco is the partial pressure of co [atm] of the reducing gas; or, an iron ore with a loss of ig = 10 wt% is reduced using h2 gas so that the metallization ratio is = 60 wt% and, after grinding, so that the milled particles have a diameter of no. more than 2mm and d50 = 100µm, go through magnetic separation.

BR112019000977-9A 2016-07-19 2017-06-29 method for improving an iron content of iron ore. BR112019000977A2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2016-141172 2016-07-19
JP2016141172A JP2018012850A (en) 2016-07-19 2016-07-19 Iron grade improving method of iron ore
JP2016141171A JP2018012849A (en) 2016-07-19 2016-07-19 Iron grade improving method of iron ore
JP2016-141171 2016-07-19
PCT/JP2017/023998 WO2018016292A1 (en) 2016-07-19 2017-06-29 Method for improving iron grade of iron ore

Publications (1)

Publication Number Publication Date
BR112019000977A2 true BR112019000977A2 (en) 2019-04-30

Family

ID=60992116

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112019000977-9A BR112019000977A2 (en) 2016-07-19 2017-06-29 method for improving an iron content of iron ore.

Country Status (3)

Country Link
AU (1) AU2017299295B2 (en)
BR (1) BR112019000977A2 (en)
WO (1) WO2018016292A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5625313B2 (en) * 2009-10-22 2014-11-19 Ｊｆｅスチール株式会社 Separation method of steel slag
JP6422037B2 (en) * 2013-07-17 2018-11-14 テクノロジカル リソーシーズ プロプライエタリー リミテッドＴｅｃｈｎｏｌｏｇｉｃａｌ Ｒｅｓｏｕｒｃｅｓ Ｐｔｙ．Ｌｉｍｉｔｅｄ Mineral processing

Also Published As

Publication number Publication date
WO2018016292A1 (en) 2018-01-25
AU2017299295A1 (en) 2019-03-07
AU2017299295B2 (en) 2019-11-07

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired