WO2010103343A1 - Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite - Google Patents

Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite Download PDF

Info

Publication number
WO2010103343A1
WO2010103343A1 PCT/IB2009/000505 IB2009000505W WO2010103343A1 WO 2010103343 A1 WO2010103343 A1 WO 2010103343A1 IB 2009000505 W IB2009000505 W IB 2009000505W WO 2010103343 A1 WO2010103343 A1 WO 2010103343A1
Authority
WO
WIPO (PCT)
Prior art keywords
chrome
ore
briquettes
hcfecr
charge
Prior art date
Application number
PCT/IB2009/000505
Other languages
English (en)
Inventor
Ranjan Sen
Original Assignee
Tata Steel (Kzn) (Pty) Limited
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 Tata Steel (Kzn) (Pty) Limited filed Critical Tata Steel (Kzn) (Pty) Limited
Priority to CN2009801555457A priority Critical patent/CN102301016B/zh
Priority to PCT/IB2009/000505 priority patent/WO2010103343A1/fr
Priority to FI20115724A priority patent/FI126945B/fi
Publication of WO2010103343A1 publication Critical patent/WO2010103343A1/fr
Priority to ZA2011/04515A priority patent/ZA201104515B/en

Links

Classifications

    • 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
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • 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
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5264—Manufacture of alloyed steels including ferro-alloys
    • 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
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • 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
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • 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
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to an improved process for production of High Carbon Ferrochrome (HCFeCr) and Charge Chrome with the use of a new type of chromite ore agglomerates. More particularly it relates to an improved process for production of briquettes from chrome ore fines and concentrates.
  • HCFeCr High Carbon Ferrochrome
  • Various processes are available for agglomeration, e.g., sintered pellets, briquettes and chrome ore sinters.
  • Different processes of briquetting are also available as characterized by the type of binders used for briquetting.
  • Different designs of SAFs are available, namely open AC SAF, semi-closed SAF and closed SAF.
  • DC operated smelting furnaces are also in use for commercial production of ferrochrome.
  • the process has four (4) distinct stages, namely,
  • the raw ore fines/concentrates are ground to fine size by wet grinding in ball mills.
  • the wet slurry is pumped to special filters for dewatering.
  • the dewatered cake is then mixed with bentonite and pelletised in drum pelletiser.
  • the green pellets thus formed, are finally sintered in steel belt sintering furnace.
  • the product is called the sintered pellets which can be charged into the SAFs for smelting to produce HCFeCr/Charge Chrome.
  • Briquettes bonded with hydrated lime and molasses are also in wide use as far as production of HCFeCr is concerned in India.
  • Brquetting process is relatively simple in terms of design, engineering and operation, when compared to sintered pellet making operation by Outokumpu process.
  • Briquetting Plants are also relatively inexpensive.
  • the raw materials for briquettes are chrome ore fines and concentrates together with suitable binding materials.
  • the chrome ore is screened and dried. After adding binders and water, the mixture is mixed homogeneously in mixers.
  • the discharge from the mixer is fed into a briquetting press and compacted into briquettes.
  • Molasses, hydrated lime, sodium silicate, slag, cement and silica fumes are the common binders used in briquetting.
  • the submerged arc furnaces include three-phase AC operation with three SOderberg electrodes and energy generation by electric resistance heating. Close control of the charge composition and its sizing, as well as the slag composition are essential for effective operation of the submerged arc furnaces.
  • Submerged Arc Furnaces There are three types of Submerged Arc Furnaces, namely, (i) open furnace, (ii) semi-closed furnace, and (iii) closed furnace. Open and semi-closed furnaces being open at the top, emit a large part of the exit gas from the furnace, into the atmosphere. These furnaces can no longer be considered acceptable due to increasingly stringent environmental norms. For the closed SAFs, 100% furnace off-gas is sucked through the ducts and cleaned in the wet gas cleaning plants by scrubbers, before the gas is let out in the atmosphere, and are thus more environment friendly.
  • Sintered pellets are mostly smelted in closed furnace to produce charge chrome / HCFeCr. This process has established itself in terms of excellent plant operation in Finland as well as South Africa. Several advantages including lower power consumption, higher chromium recovery, higher plant availability etc. have made this process highly popular. The cost of this plant is significantly high and is considered as a disadvantage.
  • the DC arc furnace includes a single central hollow graphite electrode. It is of closed top design. Unlike the Submerged Arc Furnaces, the arcs are open. It operates with ore fines/concentrates without prior agglomeration and lower grade low cost reductants like coal, char and anthracites can be used. For a given grade of input ores, this process is also known to present (i) higher %Cr (chromium) in product, (ii) higher Cr recovery, (iii) lower Phosphorus and Silicon in product, and (iv) lower slag/metal ratio.
  • the most significant advantage of DC Plasma process route is the complete elimination of agglomeration plant, and potential for using low cost reductants.
  • preheaters can be located at the top of the closed AC SAFs and DC Smelting Furnaces, where the charge is preheated up to a temperature of 600 - 700 0 C with the help of the exit gas from the closed furnace, rich in carbon monoxide.
  • An object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions to produce agglomerates of satisfactorily high hot strength to ensure minimum generation of fines during smelting in closed SAFs.
  • a further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions to produce agglomerates of satisfactory cold strength to ensure minimum generation of fines during handling and storage of briquettes.
  • a still further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions, relatively simple in terms of design, engineering and operation, when compared to conventional sintered pellet making process.
  • a still further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions, with bentonite with or without swelling, in addition to the two other binders, namely molasses and hydrated lime.
  • a still further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions, with or without heat hardening of the briquettes.
  • a still further object of this invention is to provide a clean process for agglomeration of chromite ore fines and concentrates in all possible proportions to produce agglomerates without any need for high temperature curing, thus ensuring minimal generation of hexavalent chromium (Cr +6 ).
  • a further object of this invention is to provide a clean process for smelting of briquettes of chromite ore fines and concentrates in all possible proportions, in combination with lumpy ore in all possible proportions, where applicable environmental norms can be achieved.
  • Yet another object of this invention is to provide a process for ensuring stable smelting of agglomerates made from chromite ore fines and concentrates in all possible proportions in closed SAFs without any untoward incidents.
  • a further object of this invention is to provide a process for smelting of chrome ore agglomerates made from chromite ore fines and concentrates in all possible proportions in semi-closed or open submerged are furnaces satisfactorily, in addition to the closed submerged arc furnaces.
  • a further object of this invention is to provide a process for smelting of chrome ore agglomerates made from chromite ore fines and concentrates in all possible proportions in closed SAFs to produce HCFeCr/Charge Chrome with the operating parameters like chromium recovery, chromium in metal, slag/metal ratio, % Cr 2 O 3 in slag, overall metal chemistry and specific electric power consumption, comparable with the conventional sintered pellet based operation.
  • Yet another object of this invention is to provide a process for smelting of chrome ore agglomerates made from chromite ore fines and concentrates in all possible proportions in closed SAFs to produce HCFeCr/Charge Chrome, acceptable to the designers and suppliers of closed SAFs of international reputes.
  • a further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions with a capital cost much lower than the conventional sintered pellets, resulting in lower cost of production.
  • a further object of this invention is to provide a process for agglomeration of chromite ore fines and concentrates in all possible proportions to produce agglomerates those can be used in any type of Charge Preheating Kiln fitted with a closed submerged arc furnace.
  • Friable chrome ore and concentrate was taken for briquetting and to increase the hot strengths of the briquettes, it was decided to include bentonite in the test work as a binder in addition to molasses and hydrated lime conventionally used for briquetting.
  • Friable ore and concentrate were mixed in the required proportions and dried to give a moisture content of 0.2-0.5%. After drying, bentonite followed by molasses and then water and lime (when required), were added in the required amounts. Moisture was maintained below a certain limit in the feed for all the tests. The mix prepared in this manner was then sent for briquetting and during briquetting, the briquetting force as well as the speed of the briquetting rolls were varied.
  • briquettes produced were subjected to shatter/compression tests: (a) immediately after manufacture, (b) following curing for 24 hrs at normal room temperature conditions, (c) after exposure to heat hardening at 800 0 C and 1000 0 C for 1 hr; in some special tests, the exposure time was changed to 90/105 mins.
  • Thermo-stability tests were conducted on good quality briquettes from different feed combinations by exposing the briquettes (covered with a layer of coke breeze, but with no weight on the briquettes) to 400, 600, 800, 1000, 1200 and 1350°c for half an hour, and immediately assessing their compressive strength values at that temperature (approx. 30- 5O 0 C drop in temperature occurred when the samples were taken out of the furnace and before the compressive strength could be measured).
  • the complete process of briquetting is shown in Fig 1.
  • the blends tried were: (a) 70% friable ore + 30% concentrate, (b) 50% friable ore + 50% concentrate, (c) 30% friable ore + 70% concentrate, and (d) 100% concentrate alone.
  • Green shatter strength (% + 20 mm immediately after making) : 1.00
  • thermostability of the heat hardened briquettes were observed to be lower, compared to the thrmostability of naturally cured briquettes. More precisely, while no significant differences were noted between the hot strengths of naturally cured and heat hardened briquettes in the temperature range 400 0 C - 1000 0 C, progressively increasing strengths were noted for naturally cured briquettes in the range 1000 0 C - 135O 0 C (which is not true for heat hardened briquettes).
  • Bentonite and molasses were used as the binders for making the briquettes.
  • the total duration of the smelting trial was 27 days including a ramp-up period of 9 days.
  • the trial was started with 30% briquette in the furnace charge, accompanied by a blend of chrome ore pellet and 30% hard lumpy ore.
  • the proportion of briquettes was increased in steps of 10% (at the expense of pellets) keeping hard lumpy fixed at 30%.
  • a furnace charge composition of 70% briquette and 30% hard lumpy was reached, and accordingly Day 10 is considered as the start of the stabilised period of the trial, for which all data have been taken as the basis for operation of furnace with 70% briquette.
  • the same charge composition (70% briquette and 30% hard lumpy) was maintained throughout the remaining period of the trial till Day 27.
  • the furnace could be operated in a fairly uninterrupted manner.
  • the furnace key operating parameters are observed to be highly consistent.
  • the inter-relations of the parameters have only established the logical relationships expected out of a very stable furnace operation characteristic of manufacturing of ferrochrome / charge chrome.
  • binders The range of the binders to be shown is being kept as follows: Bentonite-0.25% to 10% of the ore feed, molasses-0.25% to 10% of the ore feed. A higher percentage is not envisaged, as that makes the feed-mix too sticky and pockets of the segments get clogged. Our experience was limited to 4%, beyond which clogging was there. However, for the sensitivity to grain size, a higher band of molasses usage might be applicable, and is, therefore, being incorporated. Hydrated lime -0.1% to 5%. In general, hydrated lime is half of the quantity of molasses used. The grain size is not proposed to be included as a parameter. Therefore, the process will cover chrome ore fines and concentrates of any size/size distribution.

Landscapes

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

Abstract

L'invention concerne un procédé pour le traitement amélioré de la production de ferrochrome à haute teneur en carbone (HCFeCr) et le chargement de chrome, comprenant les étapes suivantes : mélange d'un concentré de chrome séché et de particules fines de chromite selon toutes les proportions possibles afin de former un minerai d'alimentation brut ; soumission du minerai d'alimentation brut à l'étape de mélange avec de la chaux hydratée, de la mélasse et de la bentonite en tant que liants pour donner ledit mélange afin de former une alimentation de mélange de briquetage ; formation de briquettes à partir dudit mélange grâce à un compactage.
PCT/IB2009/000505 2009-03-10 2009-03-10 Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite WO2010103343A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN2009801555457A CN102301016B (zh) 2009-03-10 2009-03-10 用新型铬铁烧结矿生产高碳铬铁(HCFeCr)和炉料铬铁的改进方法
PCT/IB2009/000505 WO2010103343A1 (fr) 2009-03-10 2009-03-10 Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite
FI20115724A FI126945B (fi) 2009-03-10 2009-03-10 Menetelmä parannetun prosessin toteuttamiseksi runsaasti hiiltä sisältävän ferrokromin (HCFeCr) ja panoskromin (Charge Chrome) valmistamiseksi
ZA2011/04515A ZA201104515B (en) 2009-03-10 2011-06-20 An improved process for the production of high carbon ferrochrome (hcfecr) and charge chrome with the use of a new type of chromite ore agglomerates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2009/000505 WO2010103343A1 (fr) 2009-03-10 2009-03-10 Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite

Publications (1)

Publication Number Publication Date
WO2010103343A1 true WO2010103343A1 (fr) 2010-09-16

Family

ID=42727844

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/000505 WO2010103343A1 (fr) 2009-03-10 2009-03-10 Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite

Country Status (4)

Country Link
CN (1) CN102301016B (fr)
FI (1) FI126945B (fr)
WO (1) WO2010103343A1 (fr)
ZA (1) ZA201104515B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA030670B1 (ru) * 2016-05-20 2018-09-28 Фазыл Каюмович ШАДИЕВ Способ получения брикетов для производства феррохрома
EA032204B1 (ru) * 2017-06-02 2019-04-30 Фазыл Каюнович Шадиев Способ получения брикетов для производства феррохрома
EP3628753A1 (fr) * 2018-09-26 2020-04-01 LANXESS Deutschland GmbH Procédé pour préparer des pastilles contenant du fer et du chrome
WO2020065134A1 (fr) * 2018-09-26 2020-04-02 Outokumpu Oyj Procédé d'utilisation de flux latéraux contenant un oxyde métallique dans des processus de fusion ferrochrome
NO20181425A1 (en) * 2018-11-06 2020-05-07 Elkem Materials Carbon based raw material
CN113293282A (zh) * 2021-04-21 2021-08-24 北京首钢国际工程技术有限公司 一种链篦机回转窑制备铬精矿氧化球团及热装冶炼方法
RU2804821C2 (ru) * 2018-09-26 2023-10-06 Оутокумпу Ойй Способ применения побочных продуктов, содержащих оксид металла, в процессах выплавки феррохрома

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107796734B (zh) * 2017-10-16 2019-12-31 首钢集团有限公司 一种铁矿粉粘结性能的测试方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941582A (en) * 1969-06-12 1976-03-02 Baum Jesse J Direct reduced iron
DE2528550A1 (de) * 1974-11-05 1976-05-06 Japan Metals & Chem Co Ltd Chromzuschlagstoff und verfahren zu seiner herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941582A (en) * 1969-06-12 1976-03-02 Baum Jesse J Direct reduced iron
DE2528550A1 (de) * 1974-11-05 1976-05-06 Japan Metals & Chem Co Ltd Chromzuschlagstoff und verfahren zu seiner herstellung

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA030670B1 (ru) * 2016-05-20 2018-09-28 Фазыл Каюмович ШАДИЕВ Способ получения брикетов для производства феррохрома
EA032204B1 (ru) * 2017-06-02 2019-04-30 Фазыл Каюнович Шадиев Способ получения брикетов для производства феррохрома
CN112689683A (zh) * 2018-09-26 2021-04-20 奥托库姆普联合股份公司 在铬铁熔炼过程中利用含金属氧化物的侧流的方法
WO2020065134A1 (fr) * 2018-09-26 2020-04-02 Outokumpu Oyj Procédé d'utilisation de flux latéraux contenant un oxyde métallique dans des processus de fusion ferrochrome
WO2020064587A1 (fr) * 2018-09-26 2020-04-02 Lanxess Deutschland Gmbh Procédé de préparation de billes contenant du fer et du chrome
EP3628753A1 (fr) * 2018-09-26 2020-04-01 LANXESS Deutschland GmbH Procédé pour préparer des pastilles contenant du fer et du chrome
JP2022501497A (ja) * 2018-09-26 2022-01-06 オウトクンプ オサケイティオ ユルキネンOutokumpu Oyj フェロクロム製錬プロセスにおいて、金属酸化物を含有する側流を利用するための方法
SE545037C2 (en) * 2018-09-26 2023-03-07 Outokumpu Oy A method for utilizing metal oxide containing side streams in ferrochrome smelting processes
JP7322141B2 (ja) 2018-09-26 2023-08-07 オウトクンプ オサケイティオ ユルキネン フェロクロム製錬プロセスにおいて、金属酸化物を含有する側流を利用するための方法
RU2804821C2 (ru) * 2018-09-26 2023-10-06 Оутокумпу Ойй Способ применения побочных продуктов, содержащих оксид металла, в процессах выплавки феррохрома
NO20181425A1 (en) * 2018-11-06 2020-05-07 Elkem Materials Carbon based raw material
NO345717B1 (en) * 2018-11-06 2021-06-28 Elkem Materials Carbon based raw material, method of producing said material and use thereof
CN113293282A (zh) * 2021-04-21 2021-08-24 北京首钢国际工程技术有限公司 一种链篦机回转窑制备铬精矿氧化球团及热装冶炼方法

Also Published As

Publication number Publication date
CN102301016B (zh) 2013-11-06
ZA201104515B (en) 2012-02-29
FI126945B (fi) 2017-08-31
CN102301016A (zh) 2011-12-28
FI20115724L (fi) 2011-07-06

Similar Documents

Publication Publication Date Title
WO2010103343A1 (fr) Procédé amélioré pour produire du ferrochrome à haute teneur en carbone (hfecr) et charger du chrome en utilisant un nouveau type d'agglomérats de minerai de chromite
KR101345063B1 (ko) 니켈 함유 합금철의 제조 방법
JP5397021B2 (ja) 還元鉄製造方法
CN104404260A (zh) 从铜渣中分离有价金属的方法
CN101591718A (zh) 直接还原-磨选处理铜渣及镍渣的炼铁方法
WO2011010669A1 (fr) Appareil et procédé pour la production de fer réduit mettant en Œuvre une poussière de production de fer alcalin en tant que matière première
CN110114481B (zh) 用于制备含镍的固结铬铁矿球团的方法、用于制备铬铁镍合金的方法和固结的铬铁矿球团
EP2035590B1 (fr) Procédé de recyclage des sous-produits en fer de l'industrie sidérurgique par traitement des pellets dans des fours de réduction directe
KR101234388B1 (ko) 환원철의 제조 방법
TWI426133B (zh) Production method of pig iron
TW200948980A (en) Producing method of reduced iron
WO2011010667A1 (fr) Briquette composite à base de carbone pour la production de fer réduit et procédé pour la production de fer réduit mettant en Œuvre une telle briquette
CN101906499A (zh) 直接还原-磨选处理硫酸渣的炼铁方法
JP5512205B2 (ja) 塊成化状高炉用原料の強度改善方法
WO2015159268A1 (fr) Production d'alliage ferrochrome
Naiker The development and advantages of Xstrata’s Premus Process
CN105925744B (zh) 一种低温下利用钢铁厂粉尘生产珠铁的方法
CN101418356A (zh) 一种从氧化镍矿中提炼镍铁合金的方法
CN110643830B (zh) 一种利用铜渣生产氧化锌与硅铁合金的方法
JP5397020B2 (ja) 還元鉄製造方法
JP2011179090A (ja) 粒鉄製造方法
Shoko et al. Briquetted chrome ore fines utilisation in Ferrochrome production at Zimbabwe alloys
CN115505666A (zh) 一种将氧化铁皮冶炼成铁的方法
Pati Reduction Behaviour of Iron Ore Pellets
CN115992311A (zh) 一种综合利用钢铁厂含锌粉尘的方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980155545.7

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09841387

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011/06662

Country of ref document: TR

WWE Wipo information: entry into national phase

Ref document number: 20115724

Country of ref document: FI

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 04/01/2012).

122 Ep: pct application non-entry in european phase

Ref document number: 09841387

Country of ref document: EP

Kind code of ref document: A1