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WO2004113577A1 - Procede de production d'agglomerats de minerai au moyen d'un liant d'hemicellulose et produits associes - Google Patents

Procede de production d'agglomerats de minerai au moyen d'un liant d'hemicellulose et produits associes Download PDF

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Publication number
WO2004113577A1
WO2004113577A1 PCT/US2004/019580 US2004019580W WO2004113577A1 WO 2004113577 A1 WO2004113577 A1 WO 2004113577A1 US 2004019580 W US2004019580 W US 2004019580W WO 2004113577 A1 WO2004113577 A1 WO 2004113577A1
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WO
WIPO (PCT)
Prior art keywords
hemicellulose
binder
agglomerates
mineral ore
balls
Prior art date
Application number
PCT/US2004/019580
Other languages
English (en)
Inventor
Roger E. Mcpherson
Original Assignee
Grain Processing Corporation
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 Grain Processing Corporation filed Critical Grain Processing Corporation
Publication of WO2004113577A1 publication Critical patent/WO2004113577A1/fr

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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
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
    • 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

  • This invention pertains to organic binders that are useful for the production of mineral ore agglomerates.
  • iron ores are mined as an oxide intimately bound in silica.
  • the iron must be separated from the silica via a beneficiation process that involves grinding the ore into very fine particles and separating the iron oxide from the silica, often in a flotation cell.
  • the resultant iron ore slurry is filtered to provide an iron ore concentrate and then formed into green balls.
  • the green balls are subsequently dried and indurated to produce durable iron oxide pellets, these pellets being referred to as taconite pellets.
  • taconite pellets The evolution of the taconite industry and the revolutionary development of the taconite pelletizing process following the depletion of the high grade iron ore bodies in the United States are detailed in the book, Pioneering with Taconite by E.W. Davis, Minnesota Historical Society, St. Paul, MN. (1964).
  • Taconite pellets are articles of commerce that can be easily transported by rail or shipped from the mining operation to blast furnaces. Because blast furnaces are often geographically separated from the mining operations, the iron oxide pellets must be durable to provide stability during transport. The spherical geometry of the iron oxide pellets allows for ease of feeding the blast furnace and facilitates the flow of reductive gases which transform the iron oxide into elemental iron.
  • the process of forming the green balls or pellets from the iron oxide concentrate typically utilizes a binder.
  • the binder imparts to the green ball sufficient strength to survive the multiple handling steps involved in the process.
  • Initial formation of the green balls is accomplished by feeding a mixture of iron ore concentrate and binder into a balling drum or rotogranulator.
  • the resultant wet green balls are then transferred to a combination dryer-induration furnace, where moisture is removed and residual organics are burned away to form a hard iron oxide pellet convenient for shipping.
  • Bentonite is typically added to a balling apparatus in an amount ranging from 15 to 20 pounds per ton of iron ore.
  • bentonite is an aluminum silicate, it adds silica back to a material that was previously beneficiated to remove the silica.
  • Silica is undesirable in that it can lead to excessive slag and glass coatings on the pellets, both of which reduce the efficiency of the furnace.
  • Bentonite also contains sodium and potassium, which are known to reduce the lifetime of furnace linings and to diminish the metallurgical properties of the iron.
  • alkali metals on iron ore pellet characteristics are described by Ajersch et al., "4th International Symposium on Agglomerations," Iron and Steel Society Journal pp. 259-266 (1985).
  • Patent 5,000,783 purports to disclose the use of a gelled starch and water dispersible gums, pectins, cellulose derivatives, vinyl polymers, and acrylic polymers.
  • U.S. Patent 6,152,985 purports to disclose the use of a hydroxamated polymer made from a water-soluble ethylenically unsaturated monomer.
  • Patent 6,071,325 purports to disclose the use of caustic with water soluble polymers such as guar, guar derivatives, carboxymethyl guar, hydroxypropyl guar, carboxymethylhydroxypropyl guar, modified starch, starch derivatives, carboxymethyl starch, pregelatinized starch, alginates, pectins, polyacrylamides and derivatives thereof, polyacrylates and copolymers thereof, polyethyleneoxides, cellulose derivatives, carboxymethyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, carboxymethyldihydroxypropyl cellulose, xanthan gum, dairy wastes, and wood related products.
  • water soluble polymers such as guar, guar derivatives, carboxymethyl guar, hydroxypropyl guar, carboxymethylhydroxypropyl guar, modified starch, starch derivatives, carboxymethyl starch, pregelatinized starch, alginates, pectins
  • the invention seeks to provide a method of producing mineral ore products that incorporate a low-cost organic binder as a partial or complete substitute for bentonite.
  • the invention seeks to provide a binder that may be prepared without significantly depleting petrochemical resources or generating significant waste streams.
  • the present invention provides a method of preparing agglomerates of a mineral ore, the method comprising mixing mineral ore particles and a binder to produce the agglomerates.
  • the binder comprises hemicellulose in an amount effective to enhance the cohesiveness of the mineral ore particles.
  • the agglomerates can take the form of spheronized agglomerates (e.g., green balls).
  • the spheronized agglomerates also can be heated to produce pellets (e.g., taconite pellets).
  • the present invention further provides agglomerates produced in accordance with the method heretofore described.
  • the agglomerates preferably comprise mineral ore particles and a binder, wherein the binder comprises hemicellulose in an amount effective to enhance the cohesiveness of the particles.
  • the agglomerates produced in accordance with the present invention can include spheronized agglomerates and pellets (such as taconite pellets), which are useful intermediates for the refinement of products produced by the mining industry.
  • the present invention further provides a mineral ore concentrate for forming mineral ore pellets, the concentrate comprising mineral ore particles having a moisture content of about 4 to about 30 weight percent; and about 0.01 to about 1 weight percent hemicellulose.
  • the present invention is directed to method for producing agglomerated products using a hemicellulose binder.
  • the present invention is further directed to agglomerated ore products prepared with a hemicellulose binder.
  • the invention is discussed in its preferred embodiments in terms of iron oxide mineral ore particles, the invention is not limited thereto, and other particles may be agglomerated in accordance with the present invention.
  • Such particles may include nearly any finely divided material, including most metallic minerals or ore.
  • the predominant metal component in the ore may be iron, chromium, copper, nickel, zinc, lead, uranium or other metal. Mixtures of the above materials or any other metal occurring in the free or molecularly combined material state as a mineral, or any combination of the above, or other metals, or metal containing ores capable of pelletization, all may be agglomerated in accordance with the present invention.
  • iron ore deposits including iron ore deposits, ore tailings, cold and hot fines from a sinter process, and aqueous 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.
  • Minerals other than metallic minerals which may be agglomerated in accordance with the invention include phosphate rock, talc, dolomite, limestone and the like.
  • Still other materials which may be agglomerated in accordance with the present invention include fertilizer materials such as potassium sulfate, potassium chloride, double sulfate of potassium and magnesium; magnesium oxide; animals feeds such as calcium phosphates; carbon black; coal fines; catalyst mixtures; glass batch mixtures; borates, tungsten carbide; refractory gunning mixes; antimony, flue dust from, for example, power generating plants, solid fuels such as coal, coke or charcoal, blast furnace fines and the like.
  • fertilizer materials such as potassium sulfate, potassium chloride, double sulfate of potassium and magnesium
  • magnesium oxide animals feeds such as calcium phosphates; carbon black; coal fines; catalyst mixtures; glass batch mixtures; borates, tungsten carbide; refractory gunning mixes
  • iron oxide mineral ore and a binder are mixed and then formed into agglomerates.
  • Mineral ore particles are typically used in the form of a concentrate having a moisture content typically of 4% to about 30% by weight, preferably about 6% to about 12% by weight, based on dry weight of the mineral ore particles.
  • the binder is typically in the form of a powder although any suitable form of the binder may be used.
  • a "binding effective amount” or “an amount effective to enhance the cohesiveness of the particles” will vary depending upon numerous factors known to the skilled artisan. Such factors include, but are not limited to, the type of particulate material to be agglomerated or pelletized, the moisture content of the particulate material, particle size, the agglomeration equipment utilized, and the desired properties of the final product, e.g. dry strength (crush), drop number, pellet size and smoothness. Though the invention is not limited to the following amounts, a binding effective amount of binder will typically be from about 0.01% to 1% by weight based on the dry weight of the particulate material.
  • Agglomerates preferably are formed by tumbling or other agitation, for example, using a balling drum or rotogranulator. Any agglomeration processes used in or similar to those used in the iron ore mining industry may be used. "Agglomeration” thus is deemed to encompass the processing of finely divided materials, whether in powder, dust, chip, or other particulate form, to form pellets, granules, briquettes, and the like.
  • Spheronized agglomerates are conventionally produced from iron oxide ore.
  • the agglomerates thus produced are referred to as "green balls.”
  • the green balls preferably are sized so that at least 50%, preferably at least 60%, and more preferably at least 70% of the balls are 'retained by a 7/16 inch X 1/2 inch screen.
  • the green balls exhibit an average survival rate of at least about 6 when tested according to the 18-inch wet ball drop test set forth in more detail hereinbelow.
  • the green balls have an average wet ball crush strength (as described in more detail hereinbelow) of at least about 1.5 psi (lb/in 2 ), more preferably between about 1.5 and about 2.0 psi.
  • the resultant wet green balls may be then dried. Any suitable equipment such as a combination dryer/induration furnace or kiln, where moisture is removed and residual organics are burned away (typically in stages at a temperature of up to 2400° F to form a hard taconite pellet. [21] Drying of the wet balls and firing of the resultant dry balls may be carried out as one continuous step or as two separate steps. However, the balls generally must be dry prior to firing, because the balls will degrade or spall if fired without first drying them. It is therefore preferred that the balls be heated slowly to a temperature of at least about 2200° F, preferably to at least about 2400° F. and then fired at that temperature.
  • the balls are dried at low temperatures, preferably by heating, or alternatively, under ambient conditions, and then fired at a temperature of at least about 2200° F, more preferably at about 2400° F. Firing is carried out for a sufficient period of time to bond the small particles into pellets with enough strength to enable transportation and/or further handling, generally about 15 minutes to about 3 hours.
  • the taconite pellets thus formed have an average 3-inch dry ball drop survival rate (as set forth in more detail hereinbelow) of at least about 1.5 and an average dry ball crush strength of greater than about 3 psi.
  • the binder comprises a hemicellulose.
  • the hemicellulose binder used in accordance with the present invention can be produced from any suitable source of hemicellulose, and the source of hemicellulose is not critical. Suitable hemicellulose sources include natural, synthetic, or semisynthetic hemicellulose sources. Preferably, the hemicellulose is obtained from one or more abundant natural resources, such as by-products produced by the grain milling industry. Such by-products include, but are not limited to, corn hulls from the corn wet milling industry, corn bran from the corn dry milling industry, spent germ from the corn wet milling industry, and spent germ from the corn dry milling industry.
  • the U.S. hybrid corn crop is an enormous and stable source of hemicellulose, and the composition of the corn hulls does not vary significantly.
  • commercially produced corn hulls may contain the following components: hemicellulose (56%), cellulose (19%,) starch (8%), protein (8%) fat (2%), acetic acid (4%), ferulic acid (3%), diferulic acid ( «1%,) coumaric acid ( «1%), and trace amounts of other materials such as phytosytosterols and minerals. Such materials can be chemically and/or physically bound together in the corn hulls.
  • hemicellulose Any suitable hemicellulose, or suitable combination of hemicelluloses, can be used in accordance with the present invention. It will be appreciated that hemicelluloses can be classified according to the production process by which they are produced.
  • Hemicellulose may be obtained in accordance with the process described in U.S. Patent 4,038,481 (Antrim et al.), referred to herein as the "Antrim” process.
  • This type of hemicellulose is highly purified (greater than 90% hemicellulose) and is generally obtained via solvent extraction.
  • a highly purified hemicellulose may be obtained by alkaline hydrolysis of corn hulls, followed by purification by ultrafiltration, an example of which is described in U.S. Patent Application No. 09/726,092.
  • Hemicellulose may also be obtained from alkaline-cooked destarched hulls, which can be prepared by destarching corn hulls, cooking the destarched hulls under alkaline conditions, and removing the insoluble materials there from. This type of hemicellulose contains roughly 60-70% hemicellulose. See, e.g., U.S. Patent 6,063,178.
  • Hemicellulose may be obtained from alkaline-cooked corn hulls without separating the insolubles or other materials, the product thus formed containing less than 50% hemicellulose.
  • This type of hemicellulose can be prepared by extrusion of alkali-treated co hulls, an example of which can be found in U.S. Patent Application Nos. 09/901,342 (Example 3) and 09/864,779 (Example 3). These hemicellulose compositions are produced via alkaline extrusion-cooking of com hulls obtained from a com wet milling process.
  • Hemicellulose may be prepared by jet cooking alkali-treated com hulls, an example of which can be found in U.S. Patent Application Nos.
  • Hemicellulose may also be prepared by batch cooking alkaline treated com hulls, an example of which can be found in U.S. Patent Application Nos. 09/901,342 (Example 2), 09/864,779 (Example 2) and 60/216,083 (Example IB). This hemicellulose composition is prepared via batch cooking under alkaline conditions at atmospheric pressure.
  • Holocellulose a highly refined mixture of hemicellulose and cellulose with few impurities, may be used in conjunction with the invention.
  • Holocellulose contains roughly 70% hemicellulose.
  • An example of holocellulose can be found in U.S. Patent Application Nos. 09/901,342 (Example 5) and 09/864,779 (Example 5), which describe the preparation of holocellulose.
  • the binder contains hemicellulose derived from extruded, preferably alkali extruded, com hulls. In another preferred embodiment, the hemicellulose content in the hemicellulose binder is about 90% hemicellulose.
  • the binder may also contain components or mixtures of components derived from the hemicellulose sources, and or other additives.
  • Suitable additives include, for example, polymers (e.g., superabsorbent polymers), copolymers, and the like.
  • Suitable superabsorbent polymers and copolymers include bentonite. Moreover, it is possible to form agglomerates using reduced levels of bentonite relative to the levels required in conventional green ball preparation.
  • the method of the present invention is particularly useful in the agglomeration of mineral ores, to provide wet green balls that with increased cohesiveness and strength relative to green balls prepared in the absence of a binder.
  • the cohesiveness or strength of binder-incorporated green balls may be measured by standardized test protocols, which are well known in the industry. Such tests include, for example, the 18-inch wet drop test, the 3 -inch dry drop test, the wet ball crush strength test, and the dry ball crush strength test.
  • This example describes the preparation of an exemplary binder of the present invention, by extrusion-cooking commercial com hulls with NaOH.
  • the extraded product was dried in a fluidized bed drier and ground into a powder.
  • the resulting product can be used as a binder in the production of ore products.
  • This example describes the production of dry, green taconite pellets (spherical balls) using the binder produced according to Example 1. For comparison, taconite pellets containing no binder and pellets containing a non-hemicellulose commercial binder were produced.
  • Dry Crash Strength Twenty oven dried (1000 °C to 1050 °C) balls were subjected to a compression test at a loading rate of 0.1 inch per second one at a time. The number reported in the table below is the average of the crash strength of the twenty dry balls (psi).
  • This example describes the production of green balls and dry taconite pellets using com hull hemicellulose. For comparison, taconite pellets containing no binder and pellets containing a non-hemicellulose commercial binder were produced.
  • Example 2 Pellet Production and Pellet Evaluation were performed as described in Example 2, except that highly pure (90%) com hull hemicellulose was used in place of the binder of Example 1. The results of the data generated in this example are shown in the following table.
  • This example describes the production of an exemplary binder of the present invention, by jet-cooking commercial com hulls with NaOH, followed by drum drying.
  • the resulting slurry was continuously jet-cooked in a continuous jet cooker equipped with a Hydroheater Combining Tube which inflicts high shear into the slurry at the point of contact with the high pressure steam at ⁇ 150 psig.
  • the hemicellulose binders used in the present invention have the further advantage of minimizing the amount of sodium in the resulting ore products, e.g., minimizing the amount of sodium in green balls obtained produced from iron ore concentrate.
  • the hemicellulose used in accordance with the present invention advantageously can be prepared with very low concentrations of sodium.
  • green balls can be prepared from hemicellulose.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (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)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention pore sur un procédé de préparation d'agglomérats d'un minerai, ce procédé consistant à mélanger des particules de minerai et un liant pour produire les agglomérats. Le liant comprend une hémicellulose dans une quantité efficace pour améliorer la cohésivité des particules de minerai. Les agglomérats peuvent être chauffés pour produire des billes utiles comme intermédiaires dans le raffinage de produits fabriqués par l'industrie minière. L'invention porte également sur les agglomérats de minerai produits selon le procédé de cette invention.
PCT/US2004/019580 2003-06-20 2004-06-18 Procede de production d'agglomerats de minerai au moyen d'un liant d'hemicellulose et produits associes WO2004113577A1 (fr)

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US48026903P 2003-06-20 2003-06-20
US60/480,269 2003-06-20

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2328536C1 (ru) * 2006-09-25 2008-07-10 Открытое акционерное общество "Учалинский горно-обогатительный комбинат" Состав шихты для получения окатышей для серно-кислотного выщелачивания текущих и лежалых хвостов обогащения медно-колчеданных руд и способ получения окатышей с его использованием
RU2402620C1 (ru) * 2009-03-25 2010-10-27 Учреждение Российской академии наук Институт химии и химической технологии Сибирского отделения РАН (ИХХТ СО РАН) Способ извлечения полезных компонентов из хвостов обогащения
RU2404269C1 (ru) * 2009-03-04 2010-11-20 Федеральное государственное унитарное предприятие "Государственный научно-исследовательский, проектный и конструкторский институт горного дела и металлургии цветных металлов" ФГУП "Гипроцветмет" Способ переработки смешанных медных руд, содержащих благородные металлы
RU2468103C1 (ru) * 2011-06-10 2012-11-27 Денис Игоревич Целюк Способ извлечения золота из лежалых хвостов намывных хвостохранилищ

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060032120A1 (en) * 2004-07-15 2006-02-16 Grain Processing Corporation Seed coating composition
WO2006017787A2 (fr) * 2004-08-06 2006-02-16 Grain Processing Corporation Composition d'enrobage de comprime
US20070251143A1 (en) * 2006-04-26 2007-11-01 Slane Energy, Llc Synthetic fuel pellet and methods
MX2009004949A (es) * 2006-11-13 2009-07-27 Adm Alliance Nutrition Inc Proceso para producir composiciones resistentes a la intemperie y productos obtenidos de los mismos.
US7985389B2 (en) * 2007-09-04 2011-07-26 Cardero Resource Corporation Direct processing of ferrotitania ores and sands
CN114737054B (zh) * 2022-04-19 2023-07-28 兴和县新太铁合金有限公司 铬铁矿氧化球团的生产方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1458377A1 (ru) * 1983-09-22 1989-02-15 Калининский политехнический институт Способ получени топливных брикетов
US5000783A (en) * 1988-07-28 1991-03-19 Oriox Technologies, Inc. Modified native starch base binder for pelletizing mineral material
WO2003005834A2 (fr) * 2001-07-09 2003-01-23 Grain Processing Corporation Aliment pour animaux, procede de preparation d'aliment pour animaux et procede d'alimentation d'un animal

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2868778A (en) * 1954-04-21 1959-01-13 Corn Prod Refining Co Process for extracting hemicellulose from corn coarse fiber
US2801955A (en) * 1955-11-17 1957-08-06 Nat Starch Products Inc Process for extraction of hemicellulose
US3716526A (en) * 1971-10-19 1973-02-13 Grain Processing Corp Refining of hemicelluloses
US4038481A (en) * 1976-05-24 1977-07-26 Standard Brands Incorporated Method for treatment of corn hulls
US6071325A (en) * 1992-08-06 2000-06-06 Akzo Nobel Nv Binder composition and process for agglomerating particulate material
DE19521187C2 (de) * 1995-06-10 1997-08-07 Fraunhofer Ges Forschung Verwendung eines ferroelektrischen keramischen Werkstoffs für die Informationsspeicherung bei elektrostatischen Druckverfahren
US5855659A (en) * 1997-05-13 1999-01-05 Corn Products International, Inc. Instant corrugating adhesive
GB9724032D0 (en) * 1997-11-13 1998-01-14 Allied Colloids Ltd Ore pelletisation
US6063178A (en) * 1998-10-30 2000-05-16 Grain Processing Corporation Corrugating adhesive, method for preparing corrugating adhesive, and corrugated board
US6179905B1 (en) * 1999-04-06 2001-01-30 Grain Processing Corporation Corrugation adhesive, corrugated board, and preparation methods therefor
US6805764B2 (en) * 2000-07-06 2004-10-19 Grain Processing Corporation Method for adhesively bonding laminates and composite structures
US6488754B2 (en) * 2000-11-29 2002-12-03 Grain Processing Corporation Lithographic dampening solution and method for dampening a lithographic plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1458377A1 (ru) * 1983-09-22 1989-02-15 Калининский политехнический институт Способ получени топливных брикетов
US5000783A (en) * 1988-07-28 1991-03-19 Oriox Technologies, Inc. Modified native starch base binder for pelletizing mineral material
WO2003005834A2 (fr) * 2001-07-09 2003-01-23 Grain Processing Corporation Aliment pour animaux, procede de preparation d'aliment pour animaux et procede d'alimentation d'un animal

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198933, Derwent World Patents Index; Class H09, AN 1989-240026, XP002297078 *
EISELE T C ET AL: "A REVIEW OF BINDERS IN IRON ORE PELLETIZATION", MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, GORDON AND BREACH, NEW YORK, NY, US, vol. 24, January 2003 (2003-01-01), pages 1 - 90, XP009033605, ISSN: 0882-7508 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2328536C1 (ru) * 2006-09-25 2008-07-10 Открытое акционерное общество "Учалинский горно-обогатительный комбинат" Состав шихты для получения окатышей для серно-кислотного выщелачивания текущих и лежалых хвостов обогащения медно-колчеданных руд и способ получения окатышей с его использованием
RU2404269C1 (ru) * 2009-03-04 2010-11-20 Федеральное государственное унитарное предприятие "Государственный научно-исследовательский, проектный и конструкторский институт горного дела и металлургии цветных металлов" ФГУП "Гипроцветмет" Способ переработки смешанных медных руд, содержащих благородные металлы
RU2402620C1 (ru) * 2009-03-25 2010-10-27 Учреждение Российской академии наук Институт химии и химической технологии Сибирского отделения РАН (ИХХТ СО РАН) Способ извлечения полезных компонентов из хвостов обогащения
RU2468103C1 (ru) * 2011-06-10 2012-11-27 Денис Игоревич Целюк Способ извлечения золота из лежалых хвостов намывных хвостохранилищ

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