CN102317481A - Production is suitable for the novel method that iron and steel are made the iron ore concentrate of process - Google Patents

Production is suitable for the novel method that iron and steel are made the iron ore concentrate of process Download PDF

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Publication number
CN102317481A
CN102317481A CN2009801116252A CN200980111625A CN102317481A CN 102317481 A CN102317481 A CN 102317481A CN 2009801116252 A CN2009801116252 A CN 2009801116252A CN 200980111625 A CN200980111625 A CN 200980111625A CN 102317481 A CN102317481 A CN 102317481A
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China
Prior art keywords
iron ore
iron
ore
mineral
sludge
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C·R·库玛
T·K·构施
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Tata Steel Ltd
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Tata Steel Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/30Combinations with other devices, not otherwise provided for
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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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)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

Produce the method for iron ore concentrate, comprise step: broken lean ore, sludge and other mineral deposit are with the iron ore particle of production size less than 1.5mm; Make said particle stand the selective separation step so that iron ore mineral and gangue mineral break away from; And obtain the enrichment ore of high Fe content (60%-67%) with low strength magnetic separator (LIMS) and HS magnetic separator (HIMS).

Description

Production is suitable for the novel method that iron and steel are made the iron ore concentrate of process
Technical field
The present invention relates to produce from ferruginous deposits the novel method of iron ore concentrate, this iron ore concentrate is suitable for the manufacturing processed of iron and steel.Therefore, the invention further relates to the gangue mineral that exists in the removal ore body.These are to hinder classification technique through adopting, and the physicals based on them adopts magnetic separator to realize subsequently.
Background technology
Common raw ore (ROM) iron ore mineral directly are not used for iron and steel is made process.Past, mondial high-quality ferruginous deposits all enriched as of late.Yet the whole world consumes above-mentioned this rich ore bed rapidly to the exponential growth of steel demand.Therefore, in order to seek alternative iron ore source, Iron And Steel Industry is compelled with lean ore, mine tailing (sludge) and other mineral deposit with high Fe content as raw material source.But this type mineral deposit needs the novel method of technique of preparing, and compares with high-quality iron ore, and this technique of preparing novel method can produce because of the gangue mineral of higher concentration makes the suitable iron ore concentrate of process quality to iron and steel.Up to the present, the prevailing method of this type of iron ore industrial treatment ore is broken and screening, gravity selected (jigging, shaking table etc.) and magnetic separation subsequently.But these methods are inappropriate for all types of ores and in mine tailing (low the recovery), have reported the remarkable loss of iron value (value).Flow process is also complicated, has a series of unit operations, and this also makes it more not possess economic attractiveness.Because the concentration of gangue is high in the lean ore bed, sometimes because form ore body complicated geographical conditions its form the membership credentials of complicacy with the iron ore mineral.The aftershaping process for example weathering in this type mineral deposit causes forming coating layer sometimes, and this coating layer is by the oxyhydroxide mineral composition of surrounding the iron ore mineral.This type coating layer is difficult to comprise the magnetic separation removal through traditional technique of preparing.Therefore, developed a kind of novel method, ore dressing has been carried out in product and other mineral deposit of containing suitable iron level of multiple ferruginous deposits, mine and dressing-works different steps.
Goal of the invention
The objective of the invention is to propose a kind of through optionally reducing the novel method of gangue mineral production iron ore concentrate;
Another object of the present invention is to propose a kind of suitable beneficiation method, is used to handle various types of ferruginous depositss, sludge, mine tailing and other contains the mineral deposit of high ferro value;
Further purpose of the present invention is the resistance that proposes a kind of physicals based on iron ore mineral and the gangue mineral classification technique that falls;
Of the present invention more further purpose be to propose resistance to the oxidized ore classification that falls.
Summary of the invention
According to the present invention, the method for the production iron ore concentrate that provides may further comprise the steps:
Broken lean ore, sludge and other mineral deposit are with the iron ore particle of production size less than 1.5mm;
Make said particle stand the selective separation step so that iron ore mineral and gangue mineral break away from; And
Obtain to have the enrichment ore of high Fe content (60%-67%) with low strength magnetic separator (LIMS) and HS magnetic separator (HIMS).
Brief Description Of Drawings
With accompanying drawing the present invention is explained in more detail:
Fig. 1: show the membership credentials between iron ore mineral and the gangue mineral.
Fig. 2: show to being used for the schema that iron ore proposed of the present invention's exploitation.
Fig. 3: show resistance fall the underflow part of classifier and the particle size distribution of overflow.
Detailed Description Of The Invention
In ferruginous deposits, rhombohedral iron ore, magnetite and pyrrhosiderite are main iron-bearing minerals.Selected based on these mineral is divided into two types like rhombohedral iron ore and magnetite with the mineral deposit usually.Common gangue mineral is silicate and carbonate.Membership credentials between these gangue minerals and the ore mineral are by the geographical conditions and hydrothermal alteration subsequently and the weathering decision that form in these mineral deposit processes.Therefore, crucial is to understand detailed membership credentials and they separate out the influence of analysis to these ore bodies.For the present invention, carry out concrete tissue and separate out analysis with existing equipment.It has also confirmed the type (quartz, pure aluminium silicate, calcite, rhombspar, oxyhydroxide mineral) and their physicals of gangue mineral.These data are used for selecting to pulverize (broken and grinding) parameter and ensuing unit operation.The iron ore mineral are heavier than gangue mineral usually, and compare with the gangue mineral of association, because hardness and cleavage is different, their crushing performance is different.Therefore, during pulverizing, gangue mineral is broken to form thick size for the most of iron ore mineral of thinner size.
In the method for the invention, utilize iron ore mineral and gangue mineral physicals, size and density difference and it is separated.When these solid particulates fell into fluid medium, they were according to the different of size, shape and density (buoyancy) and sedimentation.In hindered-settling classification, these settled solid particulate separation in fluid medium are through regulating flowing and density control of fluid medium (pseudoliquid that solid suspension forms) in medium.In the method, heavier and thicker particles settling is below fluidization regions and be called the underflow part, and this underflow part is collected from the classifier bottom.On the other hand, the lighter and thinner side of particle along fluid medium from classifier flows and this part is called overflow.
In the present invention, feed particulate size-grade distribution is controlled at the size of 0-1mm, and the speed of fluid medium (stirring water (teeter water)) is carried out innovative adjustment so that heavy and big iron ore mineral separate with lighter and thin gangue mineral.Stir the design variable that water flow velocity depends on unit (resistance fall classification).In the present invention, the iron ore mineral of>75 micron-scales and 4-5.5gm/cc density are partly collected as underflow, and have the size of 75-200 micron and the density of 2-4gm/cc at the gangue mineral of overflow part branch report.
Representative embodiment of the present invention provides in ore dressing and has made ore mineral remove the novel method of sludge simultaneously.Consider the gangue mineral and the meticulous size range (producing in the crushing process) of gangue mineral of association, after size reduces, remove the sludge operation usually to remove sludge, sludge is difficult to separate in ore dressing unit operation subsequently.Utilize the coating layer of flowing of fluid medium and the abrasion effect removal ore mineral that particle motion causes and also remove sludge with innovative mode.Therefore, compare like swirler-with traditional removal sludge operation, hindering classifier is best choice, because the hindered-settling classification device has also served as selected unit operation based on the different of particle size and density through the sorting gangue mutually.
One of main advantage of this innovative method is selected magnetite of while and hematite ore mineral.When ore body contains magnetite and rhombohedral iron ore mineral; In traditional beneficiation method (after removing sludge); At first use low strength magnetic separator (LIMS) that magnetite is separated with feed, in HS magnetic separator (HIMS), the nonmagnetic portion of this process is further handled to reclaim the hematite ore mineral then.The method that needs these two steps is because magnetite is ferromagnetic and rhombohedral iron ore is the paramagnetism mineral.In two kinds of magnetic separation techniques, for obtaining the concentrate quality of expectation, must be more than two circulations (step).Therefore, in traditional method, because sludge, LIMS and HIMS are promptly removed in the three phases operation, the loss of Fe value (Fe recovery) is very high.On the other hand, this innovative method can be carried out (perfumes) removal sludge and recovery to rhombohedral iron ore and magnetite simultaneously in a step, and has therefore produced the concentrate of the expectation quality with higher Fe alluvial.
Among the present invention, further improve, add ore dressing to hindering the classifier underflow with conventional art in order to make iron value (selected grade).In the present invention, reclaim the Fe value with magnetic and gravity separation technology from the overflow that hinders classifier.
Embodiment
The magnetite of weathering (iron distribution-50% magnetite, 30% rhombohedral iron ore and 20% pyrrhosiderite)
Implement experiment with the magnetite of iron content 55-65% and with this novel method.In a test, that 1 ton of ROM is broken and grind to form less than the 1mm size then with the resistance classifier processing that falls.Experiment condition such as feed pulp density 20-30 weight %, delivery rate 0.1-0.5t/hr, agitated bed pressure 0.04-0.09 crust, and stir water flow velocity 3-12LPM.Through this process, obtained to have the concentrate of 64-67.5%Fe.Experimental result (resistance fall classifier) is as describing among Fig. 3.Overflow is handled in LIMS and/or HIMS and about 60% ore mineral separates as magnetic part.The underflow concentrate of 64%-66%Fe is also handled the concentrate of generation+67%Fe grade in LIMS and/or HIMS.

Claims (9)

1. produce the method for iron ore concentrate, may further comprise the steps:
Broken lean ore, sludge and other mineral deposit are with the iron ore particle of production size less than 1.5mm;
Make said particle stand the selective separation step so that iron ore mineral and gangue mineral break away from; And
Obtain the enrichment ore of high Fe content (60%-67%) with low strength magnetic separator (LIMS) and HS magnetic separator (HIMS).
2. method according to claim 1, wherein broken step is carried out with recursher such as jaw crusher, roller crusher, ball milling etc.
3. method according to claim 1, wherein said selective separation step is accomplished with hindering classifier.
4. method according to claim 1, wherein selective separation is recovered in the step with acquisition enrichment iron ore and carries out.
5. method according to claim 1, wherein iron ore is selected from the iron ore of magnetite, rhombohedral iron ore, weathering, poor iron ore, sludge, mineral chip, milltailings and other iron-stone and their combination.
6. method according to claim 1, wherein the required feed of hindered sedimentation is of a size of the 0-1mm size.
7. method according to claim 1, wherein said iron ore concentrate are 64 to greater than 67.5%Fe (always), and the iron alluvial is 80-90%.
8. method according to claim 6, wherein said Fe (always) is volume (bulk) concentration of the iron in the ore.
9. method according to claim 1, the wherein said resistance classification technique that falls is Floatex density classifier, the Cross fluid classifier technology similar with other.
CN2009801116252A 2008-08-30 2009-08-28 Production is suitable for the novel method that iron and steel are made the iron ore concentrate of process Pending CN102317481A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IN1141KO2008 2008-08-30
IN1141/KOL/08 2008-08-30
PCT/IN2009/000474 WO2010023692A1 (en) 2008-08-30 2009-08-28 A novel method for production of iron ore concentrates suitable for iron and steel making processes.

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AU (1) AU2009286309B2 (en)
BR (1) BRPI0908735A2 (en)
WO (1) WO2010023692A1 (en)
ZA (1) ZA201006077B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266171A (en) * 2020-01-21 2020-06-12 山东华锴重工机械有限公司 Treatment device and treatment process for recycling solid waste of building
CN115921010A (en) * 2023-01-04 2023-04-07 辽宁省建材工业设计院有限公司 Preparation process of manganese tailing slag concrete

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Publication number Priority date Publication date Assignee Title
CN101862703B (en) * 2010-05-17 2012-01-11 昆明理工大学 Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite
CN104117426B (en) * 2013-04-26 2017-09-26 襄阳市栋梁环保科技有限公司 The method and its equipment of the copper ashes containing gold and silver are selected from domestic garbage burning electricity generation recrement
CN103406197B (en) * 2013-07-31 2015-11-11 鞍钢集团矿业公司 The technique of iron ore concentrate is sorted from chromium depleted zone mine tailing
JP6565511B2 (en) * 2015-09-08 2019-08-28 住友金属鉱山株式会社 Ore slurry processing method, nickel oxide ore hydrometallurgy method
NL2016053B1 (en) * 2015-12-30 2017-07-11 J O A Tech Beheer B V A device for collecting particles from a gaseous fluid stream, and cut tobacco processing equipment comprising such a device.

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CN86101482A (en) * 1986-02-27 1987-01-14 刘甲秋 Psilomelane prepares the method and the device of electroactive manganese dioxide powder
US6048382A (en) * 1997-08-04 2000-04-11 Bechtel Corporation Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags
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CN1593775A (en) * 2004-07-12 2005-03-16 洋浦金海铝业工贸有限公司 Method for magnetic separating of aluminum and iron in high iron bauxite
CN1695817A (en) * 2004-12-31 2005-11-16 柳利华 Method of preparation for weak magnetic coextensive ferric oxide mine

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CN86101482A (en) * 1986-02-27 1987-01-14 刘甲秋 Psilomelane prepares the method and the device of electroactive manganese dioxide powder
AU743968B2 (en) * 1996-12-03 2002-02-14 Henry Walker Eltin Contracting Pty Ltd Beneficiation of iron ore waste
US6048382A (en) * 1997-08-04 2000-04-11 Bechtel Corporation Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags
CN1389303A (en) * 2001-06-01 2003-01-08 上海梅山(集团)有限公司 Method of recovering iron concentrate from gas slime
CN1593775A (en) * 2004-07-12 2005-03-16 洋浦金海铝业工贸有限公司 Method for magnetic separating of aluminum and iron in high iron bauxite
CN1695817A (en) * 2004-12-31 2005-11-16 柳利华 Method of preparation for weak magnetic coextensive ferric oxide mine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266171A (en) * 2020-01-21 2020-06-12 山东华锴重工机械有限公司 Treatment device and treatment process for recycling solid waste of building
CN115921010A (en) * 2023-01-04 2023-04-07 辽宁省建材工业设计院有限公司 Preparation process of manganese tailing slag concrete

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AU2009286309B2 (en) 2014-03-06
WO2010023692A1 (en) 2010-03-04
ZA201006077B (en) 2011-10-26
BRPI0908735A2 (en) 2015-07-28
AU2009286309A8 (en) 2011-11-17
WO2010023692A8 (en) 2011-06-09
AU2009286309A1 (en) 2010-03-04

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Application publication date: 20120111