EP1692319B1 - Procede de production d'agglomerats de minerai de fer utilisant un liant contenant du silicate de sodium - Google Patents

Procede de production d'agglomerats de minerai de fer utilisant un liant contenant du silicate de sodium Download PDF

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Publication number
EP1692319B1
EP1692319B1 EP04820426A EP04820426A EP1692319B1 EP 1692319 B1 EP1692319 B1 EP 1692319B1 EP 04820426 A EP04820426 A EP 04820426A EP 04820426 A EP04820426 A EP 04820426A EP 1692319 B1 EP1692319 B1 EP 1692319B1
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EP
European Patent Office
Prior art keywords
binder
pellets
iron ore
alkali metal
metal silicate
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
EP04820426A
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German (de)
English (en)
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EP1692319A1 (fr
Inventor
James John Schmitt
Ronald Geert Smeink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akzo Nobel NV
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Akzo Nobel NV
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Publication of EP1692319A1 publication Critical patent/EP1692319A1/fr
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Expired - Fee Related legal-status Critical Current
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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
    • 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
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • 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

Definitions

  • the invention relates to a process for producing iron ore agglomerates.
  • US 4,552,202 relates to aqueous alkali metal silicate solutions which are made by dissolving an alkali silica powder that includes insoluble impurities and putting the impurities into stable suspension with a suspending agent such as a cellulose derivative.
  • the solution is used as a foundry binder giving improved early strength and improved breakdown properties.
  • SU 1198128 describes a charge containing (in wt%): Na salt of carboxymethylcellulose (0.005-1.0), a water-soluble salt of an alkaline-earth metal and a low molecular weight strong acid (0.01-1.0), with the remainder being iron ore material.
  • the water-soluble salt used in the composition is CaCl 2 . It is mentioned that the efficiency of the pelletising process is raised, as is the pellet strength.
  • JP 54117313 discloses a method for agglomerating nickel oxide used as Ni material for stainless or special steels, comprising mixing 10-200 mesh nickel oxide (75-95%) and below 350 mesh size fine nickel oxide (5-25%) kneaded then with CMC and water (0.1-1% in total), shaping the mixture at normal temperatures and under pressure, and drying the product at less than 200°C.
  • the CMC as binder suitably includes 1.0% NaCl, 1.5% Na 2 SO 4 , and 7% H 2 O.
  • the dried agglomeration has sufficient compressive strength, includes no harmful impurities and does not corrode the furnace body so strongly. It has no water of crystallization or fine powder attached to it.
  • US 4,948,430 describes a binder for agglomerating an ore in the presence of water, containing 10% to 90% of a water-soluble sodium carboxymethylhydroxyethyl cellulose and 10% to 90% of sodium carbonate. Furthermore, it describes a process comprising mixing a binder composition containing cellulose and sodium carbonate, water, and an ore, preferably taconite, agglomerating the mixture into wet balls, drying the wet balls, and heating the resultant dry balls at a temperature of at least about 1204°C.
  • US 4,288,245 relates to a process for the agglomeration or pelletizing of metallic ores in the presence of water with a binder containing an alkali metal salt of carboxymethyl cellulose in an amount of at least 0.01%, calculated on the weight of the dry ore material, in combination with one or more salts derived from an alkali metal and a low-molecular weak acid having a pK value higher than 3 and a molecular weight lower than 500 in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose.
  • EP 0 297 553 describes a binder composition useful for agglomerating an ore in the presence of water, which contains about 10% to about 90% of a water-soluble cellulose derivative and about 5% to about 90% of sodium tripolyphosphate or tetrasodium pyrophosphate, and a process for agglomerating an ore comprising mixing said binder composition, water, and the ore, agglomerating the mixture into wet balls, drying the wet balls, and heating the resultant dry balls at a temperature of at least about 1204°C.
  • SU 996485 describes a binder for pelletizing iron ore materials consisting of bentonite and an inorganic compound.
  • the efficiency of producing pellets is mentioned to be increased by increasing the iron content in them, while improving their physical properties, by the addition of 95-40 wt% sodium carboxymethyl cellulose to the binder containing 5-60 wt% of bentonite.
  • a process for producing iron ore agglomerates is known from US 6,293,994 , which discloses a process of making fired mineral pellets by mixing particulate mineral material with moisture and binder comprising substantially water-soluble organic polymer and alkali metal silicate in a dry weight amount which is either (a) above 0.13% based on moist mix or (b) above 0.08% based on moist mix and at least three times the dry weight of substantially water-soluble organic polymer.
  • the preferred polymer is a synthetic polymer formed of water-soluble ethylenically unsaturated monomer or monomer blend.
  • the high amount of alkali metal silicate in the pellets described in US 6,293,994 generally is undesirable, because silicates can slow down the reduction process in steel making operations by blocking the pathways the reducing gases use to permeate the pellet, which leads to an increase in energy costs. Furthermore, the use of such high amounts of alkali metal silicate results in green pellets that have a high tendency to deform, which in turn may lead to pellets of different size and shape, resulting in an inefficient process for preparing fired pellets.
  • the object of the present invention is to provide iron ore agglomerates with improved physical properties.
  • the present invention provides a process for producing iron ore agglomerates comprising agglomerating fine iron ore particles in the presence of a binder system wherein the binder system comprises a binder and an alkali metal silicate and wherein the alkali metal silicate is present in an amount of between 0.0001 to 0.07 percent by weight, based on the total weight of dry iron ore agglomerate, wherein the binder system is free of synthetic polymer.
  • the process of the invention leads to iron ore agglomerates with increased cold compression strength, preheat strength, and dry crush strength relative to the use of conventional binder systems comprising the same binder.
  • alkali metal silicate small amounts are already sufficient to obtain a significant improvement in the physical properties of the agglomerates.
  • the specified amount of alkali metal silicate causes the agglomerates obtained with the process of the invention to have a similar or only slightly higher degree of deformation than binder systems where alkali metal silicate is absent.
  • binder systems comprising a larger amount of alkali metal silicate exhibit a significant increase in the degree of deformation, which is undesirable.
  • the use of alkali metal silicate in accordance with the invention may enable a reduction of the amount of binder without a significant loss in physical properties of the obtained agglomerates.
  • the amount of alkali metal silicate is most preferably at most 0.06 wt%, based on the total weight of dry iron ore agglomerate.
  • dry iron ore agglomerate is meant the total of all ingredients used in the formation of the iron ore agglomerate except water.
  • the amount of alkali metal silicate is at least 0,02 wt%, and most preferably at least 0.04 wt%, based on the total weight of dry iron ore agglomerate.
  • pellets prepared using a binder system comprising at least 0.04 wt% of alkali metal silicate generally have a smooth surface and a higher resistance to abrasion
  • pellets prepared using a binder system comprising less than 0.04 wt% of alkali metal silicate generally exhibit a rough surface, which can lead to the generation of fines or debris during processing of the formed pellets, e.g. during transport of the pellets.
  • the alkali metal silicate usually is a sodium silicate, but other alkali metal silicates can be used.
  • sodium silicates are sodium metasilicate and the commercially available water glass.
  • the molar ratio Na 2 O:SiO 2 generally is in the range of 2:1 to 1:5, preferably in the range of 1:1 to 1:4.
  • the amount of alkali metal silicate in the binder system generally is at least 1 wt%, preferably at least 10 wt%, and most preferably at least 15 wt%, and generally it is at most 99 wt%, preferably at most 85 wt%, and most preferably at most 75 wt%, based on the total weight of the binder system.
  • the alkali metal silicate preferably is well dispersed in the particles to be agglomerated.
  • the silicate can be added to the iron ore particles in the form of a dry powder, an aqueous suspension, an aqueous solution, etc.
  • the alkali metal silicate is added in the form of an aqueous solution.
  • the binder in the binder system of the invention can be an inorganic binder or an organic binder, or a mixture thereof.
  • inorganic binders are bentonite and hydrated lime.
  • alkali metal silicate is not considered to be an inorganic binder.
  • organic binders are polymers including:
  • the aforesaid polymers may be used alone or in various combinations of two or more polymers.
  • the binder system is free of synthetic polymers.
  • synthetic polymers are polyacrylamides, such as partially hydrated polyacrylamides, methacrylamide and polymethacrylamide, polyacrylates and copolymers thereof, polyethylene oxides, and the like.
  • a further aspect of the present invention is a process for producing iron ore agglomerates comprising agglomerating fine iron ore particles in the presence of a binder system wherein the binder system comprises carboxymethyl cellulose or a salt thereof and an alkali metal silicate.
  • the binder system comprises carboxymethyl cellulose or a salt thereof and an alkali metal silicate.
  • carboxymethyl cellulose and alkali metal silicate leads to agglomerates with increased physical properties, such as cold compression strength, preheat strength, and dry crush strength.
  • the reducibility of the iron in the agglomerates generally is higher than is observed when a binder system comprising an inorganic binder is used in the agglomeration process.
  • the invention further concerns a binder system comprising carboxymethyl cellulose and an alkali metal silicate.
  • the amount of alkali metal silicate in the binder system generally is at least 1 wt%, preferably at least 10 wt%, and most preferably at least 15 wt%, and generally it is at most 99 wt%, preferably at most 85 wt%, and most preferably at most 75 wt%, based on the total weight of the binder system.
  • the carboxymethyl cellulose or the salt thereof both are referred to as "CMC" preferably is substantially water-soluble.
  • Preferred salts of carboxymethyl cellulose are alkali metal salts of carboxymethyl cellulose. Of these alkali metal salts the sodium salt is preferred.
  • the CMC used in the present invention generally has a degree of substitution (the average number of carboxymethyl ether groups per repeating anhydroglucose chain unit of the cellulose molecule) of at least 0.4, preferably at least 0.5, and most preferably at least 0.6, and at most 1.5, more preferably at least 1.2, and most preferably at most 0.9.
  • the average degree of polymerization of the cellulose furnish is at least 50, preferably at least 250, and most preferably at least 400, and generally it is at most 8,000, preferably at most 7,000, and most preferably at most 6,000.
  • sodium carboxymethyl cellulose having a Brookfield viscosity in a 1% aqueous solution of more than 2,000 cps at 30 rpm it is more preferred to use sodium carboxymethyl cellulose having a Brookfield viscosity in a 1% aqueous solution of more than 2,000 cps at 30 rpm, spindle #4. Still more preferred is sodium carboxymethyl cellulose having a Brookfield viscosity in a 1% aqueous solution of more than about 4,000 cps at 30 rpm, spindle #4.
  • a series of commercially available binders containing sodium carboxymethyl cellulose especially useful in the present invention is available from Akzo Nobel, under the trademark Peridur TM .
  • the binder is added to the particulate material depends on the type of material being agglomerated, the type of binder being used, and the desired results.
  • the binder may be added as a dry powder, an aqueous suspension, an aqueous solution, an aqueous gel, an aqueous sol (colloidal system), etc.
  • the amount of binder employed also varies with the results desired.
  • the amount of binder may range from 0.0025 to 0.5 wt.%, based on the weight of the iron ore particles, with a preferred range being 0.005 to 0.2 wt.%.
  • the amount of binder may range for example from 0.1 to 3 wt.%, based on the weight of the iron ore particles.
  • the binder and the alkali metal silicate can be added to the iron ore particles together, one after the other, etc. This is not critical, so long as care is taken to ensure that when the agglomeration takes place, the binder and the additive are present to perform.
  • the process of the invention is useful in agglomerating fine iron ore particles.
  • the invention is not limited to iron ores and is also useful in the agglomeration of fine particles of other metal ores.
  • This invention is particularly well adapted for the agglomeration of materials containing iron, including iron ore deposits, ore tailings, cold and hot fines from a sinter process, iron oxides from dust collected in systems, or aqueous suspensions of iron ore concentrates from natural sources or recovered from various processes.
  • Iron ore or any of a wide variety of the following minerals may form a part of the material to be agglomerated: taconite, magnetite, hematite, limonite, goethite, siderite, franklinite, pyrite, chalcopyrite, chromite, ilmenite, and the like.
  • the size of the material being agglomerated varies according to the desired results.
  • 100% of the particles may be less than 80 mesh, preferably, 90% are less than 200 mesh, and most preferably, 75% are less than 325 mesh.
  • additives for instance a base such as sodium hydroxide, soda, or other additives such as sodium citrate, sodium oxalate, etc.
  • base such as sodium hydroxide, soda, or other additives such as sodium citrate, sodium oxalate, etc.
  • a binding agent is added to the wetted mineral ore concentrate and the binder/mineral ore composite is conveyed to a balling drum or other means for pelletizing the ore.
  • the binding agent serves to hold or bind the mineral ore together, so that the individual agglomerates can be transported without losing their integrity en route to further processing and induration.
  • the pellets are formed, but they are still wet. These wet pellets are commonly referred to as “green pellets” or “green balls”. These green pellets are thereafter transported to a kiln and heated in stages to an end temperature of about 1,300-1,350°C. In the pelletizing process, the wet green pellets are loaded into the furnace for further processing. The moisture in the pellets is removed by induration at temperatures normally between 400-600°C. Following drying in the furnace, the pellets are transported to the preheat zone. This is an additional heating stage to further increase the pellets' hardness before they are transported to the kiln and/or final firing stage. Heating generally occurs at 900-1,200°C to bind the pellets together (e.g.
  • the pellets are dropped 10-15 feet from the grate to the kiln. This is where the preheat strength is needed to prevent the pellets from chipping and breaking apart into dust particles. Finally, the preheated pellets are fired at a temperature of between 1,300 and 1,350°C.
  • the ability of the pellets to withstand breakage throughout processing can be approximated by performing standard tests that measure the strength the pellets will need at each stage of processing. (e.g. wet crush strength, dry crush strength, preheat strength, and cold compressive strength).
  • standard tests that measure the strength the pellets will need at each stage of processing. (e.g. wet crush strength, dry crush strength, preheat strength, and cold compressive strength).
  • the present invention is illustrated in the following Examples.
  • green pellets of iron ore comprising various compounds in the amounts indicated in Table 1 were prepared.
  • the green pellets were prepared by agglomerating iron ore concentrate in the presence of a binder and a binder additive.
  • the amounts of binder and/or sodium silicate (in percent by weight) shown in Table 1 are based on the total weight of the iron ore concentrate.
  • the iron ore concentrate employed in the Examples of Table 1 was Brazilian hematite ore.
  • the binder is Peridur 330 (ex Akzo Nobel), which comprises sodium carboxymethyl cellulose and sodium carbonate, and the sodium silicate (Na 2 O:SiO 2 is 1:3.3) used in these experiments is supplied by PQ Corporation.
  • Seed pellets with a size between 3.5 and 4 mm were retained and kept apart for the formation of pellets with the desired size of 11.2 and 12.5 mm. Finished green pellets were produced by placing 165 grams of seed pellets described above in the rotating tire and adding a portion of the remaining concentrate mixture over a 3-minute growth period. Atomized water was added if necessary. Table 1 Comparative Peridur TM . Sodium silicate Example (wt%) (wt%) 1 0.03 - 2 0.03 0.20 Example 1 0.03 0.03 2 0.03 0.05 3 0.03 0.06 4 0.03 0.08
  • the moisture content, the drop number, and the wet and dry compressive strengths of the obtained green pellets were measured.
  • the Wet drop number was determined by repeatedly dropping a green pellet having a size between 11.2 and 12.5 mm from a height of 46 cm onto a horizontally placed steel plate until a visible crack formed in the pellet surface. The number of times the pellet was dropped up to the point of fracture/cracking was determined. The average number of times averaged over 20 green pellets is referred to as the "Wet drop number”.
  • a minimum of 20 wet green pellets having a size of between 11.2 and 12.5 mm were stored in an airtight container.
  • One by one the pellets were removed and placed in a standard measuring device in which a plunger of a scale was lowered onto the green pellet at a loading rate of 25 mm per minute.
  • the machine (Model Lloyd Texture Analyser TA-Plus, controlled by PC with Nexygen version 4.5 software) is equipped with a 50 N load-cell and has a probe diameter of 10 mm.
  • the deformation/deflection of the green pellet is recorded while increasing the force.
  • the deformation is defined as the change in diameter of the green pellet at a force of 1 N, provided that the pellet is not ruptured at this point.
  • 20 green pellets having a size of between 11.2 and 12.5 mm were dried in an oven at 105°C for a minimum of two hours. Following drying, the dried pellets were placed one by one in a standard measuring device in which a plunger of a scale was lowered onto the green pellet at a speed of 25 mm per 10 seconds. The maximum applied force at which the pellet cracked was determined. The average force averaged over 20 green pellets is referred to as the Dry compressive strength.
  • Table 2 Comparative Moisture Wet drop Deformation Appearance Dry Example content number (mm) green pellet compressive (%) strength (kg/pellet) 1 8.6 2.7 0.22 rough, non-sticking 1.0 2 8.6 8.3 0.28 smooth, sticky 2.0
  • Example 1 8.2 3.1 0.20 rough, non-sticking 1.2 2 8.3 4.1 0.24 smooth, non-sticking 1.9 3 8.3 5.6 0.23 smooth, non-sticking 2.9 4 8.1 4.9 0.24 smooth, non-sticking 3.3
  • the appearance of the green pellets of Examples 2-4 is smooth and non-sticking, whereas the green pellets of Comparative Example 1 are rough.
  • the pellets of Examples 2-4 will generate a lower amount of fines or debris, e.g. during transport of these pellets, compared to the pellets of Comparative Example 1.
  • the green pellets of Comparative Example 2 are smooth, they are sticky, causing undesirable clustering of the pellets during processing.

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

Claims (4)

  1. Procédé de production d'agglomérats de minerai de fer, comprenant l'agglomération de fines particules de minerai de fer en présence d'un système liant, dans lequel le système liant comprend un liant et du silicate de métal alcalin et dans lequel le silicate de métal alcalin est présent selon une quantité comprise entre 0,0001 et 0,07 pour cent en poids, sur la base du poids total d'agglomérat sec de minerai de fer, le système liant étant dépourvu de polymère synthétique.
  2. Procédé selon la revendication 1, dans lequel le liant est de la carboxyméthylcellulose.
  3. Procédé selon l'une des revendications 1 et 2, dans lequel la quantité de silicate de métal alcalin est comprise entre 0,04 et 0,07 pour cent en poids, sur la base du poids total d'agglomérat sec de minerai de fer.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel le silicate de métal alcalin est du silicate de sodium.
EP04820426A 2003-12-12 2004-12-08 Procede de production d'agglomerats de minerai de fer utilisant un liant contenant du silicate de sodium Expired - Fee Related EP1692319B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52900003P 2003-12-12 2003-12-12
PCT/EP2004/014017 WO2005059186A1 (fr) 2003-12-12 2004-12-08 Procede de production d'agglomerats de minerai de fer utilisant un liant contenant du silicate de sodium

Publications (2)

Publication Number Publication Date
EP1692319A1 EP1692319A1 (fr) 2006-08-23
EP1692319B1 true EP1692319B1 (fr) 2009-04-22

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EP04820426A Expired - Fee Related EP1692319B1 (fr) 2003-12-12 2004-12-08 Procede de production d'agglomerats de minerai de fer utilisant un liant contenant du silicate de sodium

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Country Link
US (1) US20070119563A1 (fr)
EP (1) EP1692319B1 (fr)
CN (1) CN1890391A (fr)
BR (1) BRPI0417529B1 (fr)
CA (1) CA2548395C (fr)
EA (1) EA011259B1 (fr)
MX (1) MXPA06006655A (fr)
UA (1) UA86959C2 (fr)
WO (1) WO2005059186A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2930265B1 (fr) * 2008-11-21 2012-04-06 Snf Sas Procede d'agglomeration de poussieres industrielles, en particulier par technique de briquetage
BR112012011771B1 (pt) * 2009-11-17 2019-10-08 Vale S.A. Aglomerado de finos de minério a ser usado em um processo de sinterização, e método para produção de aglomerado de finos de minério
EP2548978A1 (fr) * 2011-07-21 2013-01-23 Clariant S.A., Brazil Composition de liant pour l'agglomération de matériaux fins et procédé de granulation l'utilisant
RU2484151C1 (ru) * 2011-11-08 2013-06-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Способ получения брикетов из руд и концентратов черных металлов
KR20150058099A (ko) * 2012-05-09 2015-05-28 발레 에스.에이. 농업 잔류물로부터 카복시메틸 셀룰로스를 수득하는 방법 및 카복시메틸 셀룰로스 및 이의 용도
KR102155601B1 (ko) * 2013-12-31 2020-09-14 롯데정밀화학 주식회사 제강분진 조개탄 코팅용 조성물 및 제강분진 조개탄
GB201813370D0 (en) * 2018-08-16 2018-10-03 Binding Solutions Ltd Binder formulation
JP7207153B2 (ja) * 2019-05-16 2023-01-18 日本製鉄株式会社 塊成物
BR102019023195B1 (pt) * 2019-11-05 2021-01-19 Vale S.A. processo de produção de aglomerado de finos de minério de ferroe o produto aglomerado
CN112195338A (zh) * 2020-09-23 2021-01-08 山东金团新材料科技有限公司 一种冶金球团用高效节能复合材料添加剂
CN113215391A (zh) * 2021-04-13 2021-08-06 陕西龙门钢铁有限责任公司 一种基于烧结矿冶金性能的配矿方法
CN114921643B (zh) * 2022-03-11 2023-04-18 中南大学 一种复合有机粘结剂及其制备方法和应用

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU996485A1 (ru) * 1981-07-30 1983-02-15 Коммунарский горно-металлургический институт Св зующее дл окомковани железорудных материалов

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596132A (en) * 1947-07-31 1952-05-13 Erie Mining Co Iron ore concentrate pellets
US3554792A (en) * 1968-10-04 1971-01-12 Westinghouse Electric Corp Welding electrode
US4093448A (en) * 1974-10-29 1978-06-06 Stanislav Borisovich Eliseev Method of producing pellets from ore concentrates
NL187123C (nl) * 1975-11-20 1991-06-03 Akzo Nv Werkwijze voor het agglomereren van ertsmaterialen.
US4032352A (en) * 1976-05-03 1977-06-28 Midrex Corporation Binder composition
JPS54117321A (en) * 1978-03-04 1979-09-12 Takeshi Shirohata Warmth keeping material of molten metal based on used filter aid
JPS54117313A (en) * 1978-03-06 1979-09-12 Nippon Yakin Kogyo Co Ltd Forming of nickel oxide nodule
AU554310B2 (en) * 1981-02-20 1986-08-14 White Sea & Baltic Co. Ltd., The Silicate solutions, their production and uses as binders
SU1198128A1 (ru) * 1984-01-27 1985-12-15 Херсонский Индустриальный Институт Шихта дл получени окатышей
US4728537A (en) * 1985-11-29 1988-03-01 Allied Colloids Limited Ore pelletization
US4863512A (en) * 1987-06-29 1989-09-05 Aqualon Company Binder for metal-containing ores
US4948430A (en) * 1989-06-15 1990-08-14 Aqualon Company Ore pellets containing carboxymethylhydroxyethylcellulose and sodium carbonate
US6071325A (en) * 1992-08-06 2000-06-06 Akzo Nobel Nv Binder composition and process for agglomerating particulate material
GB9721085D0 (en) * 1997-10-03 1997-12-03 Allied Colloids Ltd Mineral palletisation
US6743275B1 (en) * 2000-05-22 2004-06-01 Alternative Casting Technologies, Llc Method of making and using ferrous metal particle briquettes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU996485A1 (ru) * 1981-07-30 1983-02-15 Коммунарский горно-металлургический институт Св зующее дл окомковани железорудных материалов

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CA2548395A1 (fr) 2005-06-30
EA011259B1 (ru) 2009-02-27
CA2548395C (fr) 2013-08-13
CN1890391A (zh) 2007-01-03
US20070119563A1 (en) 2007-05-31
EP1692319A1 (fr) 2006-08-23
MXPA06006655A (es) 2006-08-31
BRPI0417529A (pt) 2007-03-13
BRPI0417529B1 (pt) 2012-12-11
WO2005059186A1 (fr) 2005-06-30
EA200601137A1 (ru) 2006-10-27

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