MX2017010451A - Sistema y proceso para la recuperacion en seco de finos de oxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro. - Google Patents

Sistema y proceso para la recuperacion en seco de finos de oxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro.

Info

Publication number
MX2017010451A
MX2017010451A MX2017010451A MX2017010451A MX2017010451A MX 2017010451 A MX2017010451 A MX 2017010451A MX 2017010451 A MX2017010451 A MX 2017010451A MX 2017010451 A MX2017010451 A MX 2017010451A MX 2017010451 A MX2017010451 A MX 2017010451A
Authority
MX
Mexico
Prior art keywords
compacted
iron
iron oxide
semi
rocks
Prior art date
Application number
MX2017010451A
Other languages
English (en)
Inventor
Fumyo Yamamoto Mauro
Original Assignee
New Steel Soluções Sustentaveis S A
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 New Steel Soluções Sustentaveis S A filed Critical New Steel Soluções Sustentaveis S A
Publication of MX2017010451A publication Critical patent/MX2017010451A/es

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/38Adding fluid, other than for crushing or disintegrating by fluid energy in apparatus having multiple crushing or disintegrating zones
    • 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • 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
    • B03C1/10Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/04Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • 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
    • B03C1/025High gradient magnetic separators
    • 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
    • B03C1/025High gradient magnetic separators
    • B03C1/031Component parts; Auxiliary operations
    • B03C1/033Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • 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
    • B03C1/16Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • 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
    • B03C2201/00Details of magnetic or electrostatic separation
    • B03C2201/20Magnetic separation of bulk or dry particles in mixtures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06Feeding or discharging arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2200/00Recycling of non-gaseous waste material
    • 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
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Iron (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)

Abstract

La presente invención se refiere a un sistema y a un proceso para la recuperación en seco de finos de óxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro que comprende medios de trituración primaria (5), secundaria (6) y terciaria (7, 7´) para la reducción preliminar de la granulometría de minerales que contiene los finos de óxido de hierro en rocas compactas y semicompactas; medios de molienda fina (10, 10´, 21) de los minerales de óxido de hierro reducidos en las trituraciones primaria (5), secundaria (6) y terciaria (7, 7´), provistos de un aeroclasificador dinámico (3.5, 4.6,5.4); medios de aeroclasificación estática (11, 12, 13) dispuestos en serie para cortes granulométricos intermedios y filtros de manga (14) para la retención de la fracción fina; y medios de separación magnética (15, 16, 17) , con rodillos magnéticos (71, 72, 73) dispuestos en cascada en un ángulo de inclinación variable, y formados por imanes de baja y / o alta intensidad magnética.
MX2017010451A 2015-02-13 2016-02-05 Sistema y proceso para la recuperacion en seco de finos de oxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro. MX2017010451A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102015003408A BR102015003408B8 (pt) 2015-02-13 2015-02-13 Sistema para recuperação a seco de finos de óxido de ferro a partir de rochas compactas e semicompactas portadoras de ferro
PCT/BR2016/050020 WO2016127235A1 (pt) 2015-02-13 2016-02-05 Sistema e processo para recuperação a seco de finos de óxido de ferro a partir de rochas compactas e semicompactas portadoras de ferro

Publications (1)

Publication Number Publication Date
MX2017010451A true MX2017010451A (es) 2017-11-13

Family

ID=53432790

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2017010451A MX2017010451A (es) 2015-02-13 2016-02-05 Sistema y proceso para la recuperacion en seco de finos de oxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro.

Country Status (16)

Country Link
US (1) US10682652B2 (es)
CN (1) CN107530712A (es)
AR (1) AR104002A1 (es)
AU (1) AU2016218961B2 (es)
BR (1) BR102015003408B8 (es)
CA (1) CA2976261C (es)
CL (1) CL2017002063A1 (es)
EA (1) EA033729B1 (es)
MX (1) MX2017010451A (es)
NO (1) NO20171469A1 (es)
PE (1) PE20171687A1 (es)
SA (1) SA517382119B1 (es)
SE (1) SE541853C2 (es)
UA (1) UA121668C2 (es)
WO (1) WO2016127235A1 (es)
ZA (1) ZA201706202B (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017045041A1 (pt) * 2015-09-18 2017-03-23 New Steel Soluções Sustentaveis S.A. Sistema e processo para recuperação a seco de finos de óxido de ferro a partir de rochas compactas portadoras de ferro
EP3292912B1 (de) * 2016-09-09 2019-12-25 Loesche GmbH Verfahren zum betrieb eines multizyklons zum trennen von fein- und feinstkorn sowie multizyklon
CN107029869A (zh) * 2017-06-16 2017-08-11 鞍钢集团矿业有限公司 一种磁铁矿双介质、塔磨‑磁振选矿机选别工艺
US10898902B2 (en) * 2017-12-20 2021-01-26 Taiyuan University Of Science And Technology Production line for recycling and processing waste materials of steel rolling
US11097283B2 (en) * 2018-10-30 2021-08-24 New Planet Energy Development Llc Systems and methods for municipal solid waste recycling facility
EP3880854A4 (en) * 2018-11-14 2022-08-31 IB Operations Pty Ltd METHOD AND DEVICE FOR PROCESSING MAGNETITE
WO2020097668A1 (en) * 2018-11-14 2020-05-22 IB Operations Pty Ltd Method and apparatus for processing magnetite
DE102019001907A1 (de) * 2019-03-20 2020-09-24 Lig Gmbh Verfahren und Vorrichtung zum Trennen von Aufgabegut
CN109847892A (zh) * 2019-03-20 2019-06-07 兰州大学 一种还原扩散法制备稀土类-过渡金属合金除杂质的装置
EA202192790A1 (ru) * 2019-04-15 2022-01-27 Эф-Эл-Смидт А/С Система и способ сухого помола для сокращения обезвоживания отходов, повышения эффективности флотации, получения более сухих отходов и предотвращения засорения фильтрующей среды
CN110340002A (zh) * 2019-06-24 2019-10-18 北京祐林永磁材料有限公司 一种钕铁硼选别机
BR102019015709B1 (pt) 2019-07-30 2023-05-16 Vale S.A Processo de cominuição de minério de ferro ou produtos de minério de ferro a umidade natural
EP4069397A4 (en) * 2019-12-06 2024-03-20 Iron Ore Company of Canada FLUID-ASSISTED PARTICLE CLASSIFICATION SYSTEM AND METHOD OF USE
CN111604497A (zh) * 2020-06-20 2020-09-01 信丰县包钢新利稀土有限责任公司 一种钕铁硼超细粉预处理装置
CN112077077A (zh) * 2020-08-10 2020-12-15 含山县龙顺机械配件厂 一种钢铁粉末环保收集器
BR102020023390B1 (pt) * 2020-11-16 2021-10-05 Vale S.A. Método e sistema para remoção de partículas de minério de ferro aderidas por histerese magnética a uma matriz magnética de um separador magnético vertical
CN112517228B (zh) * 2020-11-17 2022-04-19 攀钢集团攀枝花钢铁研究院有限公司 一种从钒钛磁铁矿选钛尾矿中回收钛的方法
CN112588432A (zh) * 2020-12-08 2021-04-02 鞍钢集团矿业有限公司 一种易泥化铁矿石的超细碎磨矿分级方法
CN112916182B (zh) * 2021-04-14 2022-11-18 江苏安基建设有限公司 一种建筑用废料多级处理装置及使用方法
CN113798042A (zh) * 2021-09-16 2021-12-17 上海岩川科技有限公司 一种用于铁矿的选矿方法和选矿控制系统
CN113751173B (zh) * 2021-10-13 2023-03-24 天津格润爱德环保科技有限公司 一种固体垃圾破碎处理系统
US11850601B2 (en) * 2021-12-27 2023-12-26 Ekamor Resource Corporation Device, method, and control system for waste to energy generation and other output products
WO2023183994A1 (pt) * 2022-03-30 2023-10-05 Vale S.A. Sistema e processo de concentração magnética a seco de concentrados finos de minério de ferro
CN116984120A (zh) * 2023-09-26 2023-11-03 南通大鹏光电有限公司 一种用于太阳能光伏玻璃制造的硅砂除杂装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905556A (en) * 1974-05-20 1975-09-16 Air Prod & Chem Method and apparatus for recovery of metals from scrap
CH620256A5 (es) * 1976-06-14 1980-11-14 Gewerbebank Baden Ag
CN87216834U (zh) * 1987-12-22 1988-08-17 广西冶金研究所 细碎颚式破碎机
US5772126A (en) * 1996-11-06 1998-06-30 Ppg Industries, Inc. System and process for recycling waste material produced by a glass fiberizing process
US5992774A (en) * 1998-03-16 1999-11-30 Insun Company, Ltd. Method and system for recycling construction waste articles
WO2009023557A2 (en) * 2007-08-10 2009-02-19 Warren Vanderpool Waste processing process
US20140014748A1 (en) * 2009-05-08 2014-01-16 James Russell Zeeck System for shredding and grinding biomass
CN101705352A (zh) * 2009-11-04 2010-05-12 长沙有色冶金设计研究院 矿石破碎方法
US8567702B2 (en) * 2011-02-09 2013-10-29 Wisconsin Film & Bag, Inc. Post consumer scrap film recycling process
CN102205273B (zh) * 2011-05-18 2013-03-06 安徽金日盛矿业有限责任公司 一种低品位磁铁矿与镜铁矿的混合矿选矿工艺
CN102240588B (zh) * 2011-05-19 2013-12-18 成都利君实业股份有限公司 一种磁铁矿干磨干选方法
US9440239B1 (en) * 2012-01-31 2016-09-13 ASR Holding Company Method for progressive separation and extraction of raw materials from residential roofing products
BR102012008340B8 (pt) * 2012-03-19 2022-12-13 Steel Participacoes E Investimentos S A Processo e sistema para recuperação a seco de finos e super finos de minério óxido de ferro
AU2013334500C1 (en) 2012-10-26 2019-03-07 Vale S.A. Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration

Also Published As

Publication number Publication date
AU2016218961B2 (en) 2020-11-05
BR102015003408A2 (pt) 2015-06-23
EA201791826A1 (ru) 2018-01-31
WO2016127235A1 (pt) 2016-08-18
UA121668C2 (uk) 2020-07-10
US20180036803A1 (en) 2018-02-08
AR104002A1 (es) 2017-06-21
BR102015003408B8 (pt) 2022-12-13
SE1751104A1 (en) 2017-09-12
CN107530712A (zh) 2018-01-02
BR102015003408B1 (pt) 2018-10-02
CA2976261C (en) 2022-12-13
ZA201706202B (en) 2019-04-24
US10682652B2 (en) 2020-06-16
CL2017002063A1 (es) 2018-04-27
SA517382119B1 (ar) 2021-08-24
EA033729B1 (ru) 2019-11-20
AU2016218961A1 (en) 2017-09-28
NO20171469A1 (en) 2017-09-12
PE20171687A1 (es) 2017-11-27
CA2976261A1 (en) 2016-08-18
SE541853C2 (en) 2019-12-27

Similar Documents

Publication Publication Date Title
MX2017010451A (es) Sistema y proceso para la recuperacion en seco de finos de oxido de hierro a partir de rocas compactas y semicompactas portadoras de hierro.
EA201590976A1 (ru) Способ переработки рудосодержащего материала и комплекс для его осуществления
CN203790994U (zh) 矿用破碎机
CN105855019A (zh) 一种磁铁矿超细碎-分级磁选方法
MX2013006028A (es) Recuperacion magnetica de elementos de valor a partir de escoria.
SE543660C2 (en) A method for mining and processing of an ore
CN104384020A (zh) 一种超贫磁铁矿石深度破碎选矿工艺
CN103785518A (zh) 极贫钒钛磁铁矿石综合回收利用方法
CN102641782A (zh) 一种选矿方法
PH12014502026A1 (en) Method for recovering chromite, and method for wet smelting of nickel oxide ore
WO2015168743A3 (en) Apparatus and process for fines recovery
SE1750569A1 (en) Method and system for total dry refining of iron oxide ore through a magnetic separation unit
PH12017502045B1 (en) Mineral ore slurry pretreatment method, and method for manufacturing mineral ore slurry
CN102441480B (zh) 赤铁矿纯物理选矿方法
MX2020005743A (es) Proceso de baja energia para la extraccion de metales.
RU2436636C1 (ru) Способ обогащения железосодержащих руд
CN104324793A (zh) 一种钒钛磁铁矿预处理方法
US9463469B2 (en) System and method of re-processing metal production by-product
MY173233A (en) Methods and compositions comprising cement kiln dust having an altered particle size
MX2018003319A (es) Instalacion de molienda movil.
CN105057095A (zh) 一种非金属矿中强磁性矿物的去除方法
CN105032604A (zh) 一种利用磁场筛选机制备高纯铁精矿的选矿工艺
BR102014012541A8 (pt) Sistema e processo para recuperação a seco de finos de óxido de ferro a partir de rochas compactas portadoras de ferro
AR101993A1 (es) Sistema y proceso para la recuperación en seco de finos de óxido de hierro a partir de rocas compactas portadoras de hierro
RU2632788C1 (ru) Способ обогащения железосодержащих руд