CN106362858A - Process for extracting cement-replacing superfine iron tailing powder from iron tailings - Google Patents

Process for extracting cement-replacing superfine iron tailing powder from iron tailings Download PDF

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Publication number
CN106362858A
CN106362858A CN201610895070.7A CN201610895070A CN106362858A CN 106362858 A CN106362858 A CN 106362858A CN 201610895070 A CN201610895070 A CN 201610895070A CN 106362858 A CN106362858 A CN 106362858A
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CN
China
Prior art keywords
magnetic separator
grade
tailings
vertical
stage nitration
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Pending
Application number
CN201610895070.7A
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Chinese (zh)
Inventor
于克旭
李荣海
陈强
蔡志浩
朱万刚
胡泉
刘振生
姚秀华
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Angang Group Mining Co Ltd
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Angang Group Mining Co Ltd
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Priority to CN201610895070.7A priority Critical patent/CN106362858A/en
Publication of CN106362858A publication Critical patent/CN106362858A/en
Pending legal-status Critical Current

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    • 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
    • B03B9/06General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/52Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

Abstract

The invention relates to a process for extracting cement-replacing superfine iron tailing powder from iron tailings. The process is characterized by comprising the following steps: feeding the iron tailings of which the grade is 11.68% into a first-stage drum magnetic separator, and feeding the tailings of the first-stage drum magnetic separator into a first-stage vertical ring magnetic separator; combining the ore concentrate of the first-stage drum magnetic separator with the ore concentrate of the first-stage vertical ring magnetic separator to form once-mixed ore concentrate of which the grade is 20.96%; feeding the once-mixed ore concentrate into a primary whirlcone for classification; feeding the ore concentrate overflowing from the primary whirlcone into a second-stage drum magnetic separator; feeding the tailings of the second-stage drum magnetic separator into a first-stage thickener and a second-stage vertical ring magnetic separator, and combining the ore concentrate of the second-stage drum magnetic separator with the ore concentrate of the second-stage vertical ring magnetic separator to form twice-mixed ore concentrate of which the grade is 29.12%; concentrating the twice-mixed ore concentrate by the second-stage thickener, wherein the concentrated twice-mixed ore concentrate of which the concentration is 90% is the final ore concentrate; combining the tailings of the first-stage vertical ring magnetic separator with the tailings of the second-stage vertical ring magnetic separator to obtain the final tailings of which the grade is 6.29%, the particle size is -400 meshes and the concentration is 80% to 90%, wherein the final tailings are used as superfine powder tailings for replacing cement. The process disclosed by the invention has the advantages of reasonably utilizing low-grade tailings and reducing the amount of tailings which enter a tailings pond.

Description

The technique extracting the ultra-fine ferrum tail powder substituting cement from iron tailings
Technical field
The invention belongs to a kind of technical field of beneficiation, extract more particularly, to a kind of iron tailings from Anshan type and substitute cement The technique of ultra-fine ferrum tail powder.
Background technology
, as a kind of economical and practical complex mineral raw material, its valuable mineral iron mineral can be used as metallurgy for Anshan type iron tailings Raw material, gangue mineral silicon can be used as the raw material of building material product.Every physics and chemistry can be developed using Anshan type iron tailings now to refer to Mark meets the building material product such as devitrified glass, low-expansion glass-ceramic and haydite of new material product requirement, however, Anshan type Iron tailings is but a small part in terms of the devitrified glass making, low-expansion glass-ceramic product, and reasonable utilization of mine tailing is begun It is stuck in a relatively limited stage eventually, level of comprehensive utilization is low, technological process innovation is not.
With regard to extracting building sand correlation technique from iron tailings, at home and abroad have a lot of scholars in research, and make Substantial amounts of report, but extract the succedaneum of cement from iron tailings, there is presently no relevant report.Closest to the present invention as specially Sharp application number cn200810228033.6, its technological process is that by mine tailing chute, protocercal tail ore pulp is directly fed surge tank, mine tailing Slurry carries out stirring of sizing mixing in surge tank, and the Tailings Slurry after stirring of sizing mixing is pumped to cyclone by ore pulp, the tail after stirring of sizing mixing Ore pulp is separated into sand setting and overflow in cyclone, and the sand setting separated by cyclone is fed dewatering screen, will be by cyclone The overflow separated is sent into water treatment system and is recycled, the oversize of dewatering screen as the building sand of final products, Siftage sends surge tank back to.The granularity of final products is the 35-45% that -200 mesh account for product gross weight, and moisture content percentage by weight is low In 15%.The product of this patent is primarily used to substitute the building sand in concrete.
Content of the invention
It is an object of the invention to provide a kind of rationally utilize Anshan type low-grade tailings, decrease mine tailing and enter Tailings Dam, Decrease Tailings Dam to take up an area, the work extracting the ultra-fine ferrum tail powder substituting cement from iron tailings of the prolonging tailing storehouse length of service Skill.
The object of the present invention is achieved like this.
A kind of technique extracting the ultra-fine ferrum tail powder substituting cement from iron tailings of the present invention is it is characterised in that include The following step:
A) iron tailings of grade 11.68%-13.68% is fed one section of drum magnetic separator, the tailings grade of one section of drum magnetic separator 9.66%-11.66% feeds one section of vertical-ring magnetic separator;
B) grade is one section of drum magnetic separator concentrate of 22.39%-22.39% and grade is 19.97% 1 section of vertical-ring magnetic separator Concentrate merges into a mixed concentrate of grade 20.96%-22.96%;
C) the one of grade 20.96%-22.96% mixes concentrate and feeds a cyclone classification operation, and its granularity is -200 mesh 70-80% A cyclone sink and feed one section of tower mill, the ore discharge of tower mill returns a cyclone, granularity be -400 mesh 80-90% once Cyclone overflows and feeds two-stage nitration drum magnetic separator;
D) the two drum magnetic separator mine tailings for 17.16%-19.16% for the grade feed one section of concentrator, and one section of thickener underflow feeds Two-stage nitration vertical-ring magnetic separator, the overflow of one section of concentrator uses as recirculated water;
C) two-stage nitration for 26.11%-28.11% for the two-stage nitration drum magnetic separator concentrate and grade for 34.13%-36.13% for the grade founds ring Magnetic separator concentrate merges into the two mixed concentrate that grade is 29.12%-31.12%;
D) after the concentration of two-stage nitration concentrator, underflow feeds mixed fine filter and is filtered two mixed concentrate, and the grade after filtration is 29.12%-31.12%, concentration is 90% two mixed essences is final concentrate;The overflow of two-stage nitration concentrator and the filter liquor conduct of mixed essence Recirculated water use, and one section of vertical-ring magnetic separator mine tailing and two-stage nitration vertical-ring magnetic separator mine tailing merge into grade be 6.29%, granularity be- 400 mesh 80-90% true tailings, the micropowder mine tailing of cement as an alternative.
Further, one section of described drum magnetic separator adopts permanent-magnet drum type magnetic separator, one section drum magnetic separator magnetic induction Intensity is 200mt.
Further, one section of described vertical-ring magnetic separator adopts vertical ring high-gradient magnetic separator, one section of vertical-ring magnetic separator magnetic induction Intensity is 300~500mt.
Further, described two-stage nitration drum magnetic separator adopts permanent-magnet drum type magnetic separator 20, two-stage nitration drum magnetic separator magnetic strength Intensity is answered to be 160mt.
Further, described two-stage nitration vertical-ring magnetic separator adopts vertical ring high-gradient magnetic separator 4, two-stage nitration vertical-ring magnetic separator magnetic strength Intensity is answered to be 300~500mt.
The micropowder mine tailing being extracted by this technique in use, in concrete practice of construction, maximum alternative The 50% of cement.As seen from the experiment, this mine tailing cement mortar 28d compressive strength rate greatly improves, by 43.5% before sorting Bring up to 81.7%.Specific surface area 800cm2/kg after test;Metal Ferrum content≤2.0%.Fully meet the industrial requirements of cement.
The invention has the advantage that
Reduce further select tailings grade again while, rationally utilize low-grade tailings, decrease mine tailing enter Tailings Dam, subtract Tailings Dam occupation of land, the prolonging tailing storehouse length of service are lacked.
Brief description
Fig. 1 is for extracting the process chart of the ultra-fine ferrum tail powder substituting cement in the iron tailings of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of technique extracting the ultra-fine ferrum tail powder substituting cement from iron tailings of the present invention, its feature It is, comprise the following steps:
A) iron tailings of grade 11.68% is fed one section of drum magnetic separator, the tailings grade 9.66% of one section of drum magnetic separator is given Enter one section of vertical-ring magnetic separator;One section of described drum magnetic separator adopts ctb1245 permanent-magnet drum type magnetic separator 20, one section cartridge type Magnet separator magnetic induction is 200mt;
B) grade be 22.39% one section of drum magnetic separator concentrate and concentrate that grade is 19.97% 1 section of vertical-ring magnetic separator merge Mix concentrate for the one of grade 20.96%;One section of described vertical-ring magnetic separator adopts slon-3000 vertical ring high-gradient magnetic separator 10, One section of vertical-ring magnetic separator magnetic induction is 300~500mt;
C) the one of grade 20.96% mixes concentrate and feeds a cyclone classification operation, and its granularity is the once rotation of -200m70-80% Stream device sinks and feeds one section of tower mill, and the ore discharge of tower mill returns a cyclone, granularity be -400m80-90% a cyclone overflow to Enter two-stage nitration drum magnetic separator;Described two-stage nitration drum magnetic separator adopts ctb1245 permanent-magnet drum type magnetic separator 20, two-stage nitration cartridge type magnetic Machine magnetic induction is selected to be 160mt;
D) grade is that 17.16% two drum magnetic separator mine tailings feed one section of concentrator, and one section of thickener underflow feeds two-stage nitration and founds ring Magnetic separator, the overflow of one section of concentrator uses as recirculated water;
C) grade be 34.13% two-stage nitration drum magnetic separator concentrate and two-stage nitration vertical-ring magnetic separator concentrate that grade is 26.11% merge It is 29.12% in two mixed concentrate for grade;Described two-stage nitration vertical-ring magnetic separator adopts slon-3000 vertical ring high-gradient magnetic separator 4 Platform, two-stage nitration vertical-ring magnetic separator magnetic induction is 300~500mt;
D) after the concentration of two-stage nitration concentrator, underflow feeds mixed fine filter and is filtered two mixed concentrate, and the grade after filtration is 29.12%, concentration is 90% two mixed essences is final concentrate;The overflow of two-stage nitration concentrator and mixed essence filter liquor make as recirculated water With, and one section of vertical-ring magnetic separator mine tailing and two-stage nitration vertical-ring magnetic separator mine tailing merge into grade for 6.29%, granularity is -400 mesh 80- 90% true tailings, the micropowder mine tailing of cement as an alternative.
The present invention utilizes micropowder mine tailing cement raw material as an alternative, makes iron ore deposit comprehensive utilization ratio, solid waste Comprehensive utilization ratio is significantly improved.Not only competitiveness commercially is strong, remarkable in economical benefits, make full use of resource and Environmental protection aspect, also has great significance.In recent years, with the rise of building trade, cement demand just increasingly increases, We should catch rare opportunity, promotes the industrialization of this project, in sustainable development constantly developing new approach it is established that new Point of economic increase.

Claims (5)

1. a kind of technique of the ultra-fine ferrum tail powder substituting cement of extracting from iron tailings is it is characterised in that comprise the following steps:
A) iron tailings of grade 11.68%-13.68% is fed one section of drum magnetic separator, the tailings grade of one section of drum magnetic separator 9.66-11.66% feeds one section of vertical-ring magnetic separator;
B) grade is one section of drum magnetic separator concentrate of 22.39%-24.39% and grade is the vertical ring magnetic of mono- section of 19.97%-21.97% The concentrate selecting machine merges into a mixed concentrate of grade 20.96%-22.96%;
C) the one of grade 20.96%-22.96% mixes concentrate and feeds a cyclone classification operation, and its granularity is -200 mesh 70-80% A cyclone sink and feed one section of tower mill, the ore discharge of tower mill returns a cyclone, granularity be -400 mesh 80-90% once Cyclone overflows and feeds two-stage nitration drum magnetic separator;
D) the two drum magnetic separator mine tailings for 17.16%-19.16% for the grade feed one section of concentrator, and one section of thickener underflow feeds Two-stage nitration vertical-ring magnetic separator, the overflow of one section of concentrator uses as recirculated water;
C) two-stage nitration for 26.11%-28.11% for the two-stage nitration drum magnetic separator concentrate and grade for 34.13%-36.13% for the grade founds ring Magnetic separator concentrate merges into the two mixed concentrate that grade is 29.12%-31.12%;
D) after the concentration of two-stage nitration concentrator, underflow feeds filter and is filtered two mixed concentrate, and after filtration, grade is 29.12%- 31.12%, concentration is 90% two mixed essences is final concentrate;The overflow of two-stage nitration concentrator and mixed essence filtrate make as recirculated water With, and one section of vertical-ring magnetic separator mine tailing and two-stage nitration vertical-ring magnetic separator mine tailing merge into grade for 6.29%-8.29%, granularity is -400 Mesh 80-90% true tailings, the micropowder mine tailing of two-stage nitration vertical-ring magnetic separator mine tailing cement as an alternative.
2. according to claim 1 from iron tailings extract substitute cement ultra-fine ferrum tail powder technique it is characterised in that One section of described drum magnetic separator adopts ctb1245 permanent-magnet drum type magnetic separator 20, one section drum magnetic separator magnetic induction For 200mt.
3. according to claim 1 from iron tailings extract substitute cement ultra-fine ferrum tail powder technique it is characterised in that One section of described vertical-ring magnetic separator adopts slon-3000 vertical ring high-gradient magnetic separator 10, and one section of vertical-ring magnetic separator magnetic induction is strong Spend for 300~500mt.
4. according to claim 1 from iron tailings extract substitute cement ultra-fine ferrum tail powder technique it is characterised in that Described two-stage nitration drum magnetic separator adopts ctb1245 permanent-magnet drum type magnetic separator 20, and two-stage nitration drum magnetic separator magnetic induction is 160mt.
5. according to claim 1 from iron tailings extract substitute cement ultra-fine ferrum tail powder technique it is characterised in that Described two-stage nitration vertical-ring magnetic separator adopts slon-3000 vertical ring high-gradient magnetic separator 4, two-stage nitration vertical-ring magnetic separator magnetic induction For 300~500mt.
CN201610895070.7A 2016-10-14 2016-10-14 Process for extracting cement-replacing superfine iron tailing powder from iron tailings Pending CN106362858A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2693203C1 (en) * 2017-12-27 2019-07-01 Общество с ограниченной ответственностью "Научно-производственное региональное объединение "Урал" (ООО НПРО "Урал") Three-stage grinding line of magnetite-hematite ores
CN110292807A (en) * 2018-03-22 2019-10-01 南京梅山冶金发展有限公司 Superfine Tailing thickening dewatering process

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1326571C (en) * 1987-01-16 1994-01-25 Mku Thaddeus Ityokumbul Recovery of metal values from oil sands tailings slurry
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
CN101596492A (en) * 2009-07-01 2009-12-09 武汉科技大学 A kind of micro powder dry-type magnetic separator
CN101603121A (en) * 2009-07-01 2009-12-16 武汉科技大学 A kind of method with weak magnetic iron ore for producing fine iron powder and cement
CN101708480A (en) * 2008-10-13 2010-05-19 鞍钢集团矿业公司 Mineral separation process for tailing extraction building sands and mineral separation equipment
CN102343304A (en) * 2011-08-11 2012-02-08 安徽大昌矿业集团有限公司 Comprehensive utilization method for iron core tailings
CN102527503A (en) * 2012-01-10 2012-07-04 苏木清 Ore dressing system and method for recycling tailings containing iron
CN105107617A (en) * 2015-09-22 2015-12-02 赣州金环磁选设备有限公司 Method for increasing comprehensive utilization ratio of ilmenite
CN105233976A (en) * 2015-11-05 2016-01-13 鞍钢集团矿业公司 Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method
CN105233974A (en) * 2015-11-05 2016-01-13 鞍钢集团矿业公司 Fine grinding magnetic separation-roasting-regrinding magnetic separation tailing recovery process

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1326571C (en) * 1987-01-16 1994-01-25 Mku Thaddeus Ityokumbul Recovery of metal values from oil sands tailings slurry
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
CN101708480A (en) * 2008-10-13 2010-05-19 鞍钢集团矿业公司 Mineral separation process for tailing extraction building sands and mineral separation equipment
CN101596492A (en) * 2009-07-01 2009-12-09 武汉科技大学 A kind of micro powder dry-type magnetic separator
CN101603121A (en) * 2009-07-01 2009-12-16 武汉科技大学 A kind of method with weak magnetic iron ore for producing fine iron powder and cement
CN102343304A (en) * 2011-08-11 2012-02-08 安徽大昌矿业集团有限公司 Comprehensive utilization method for iron core tailings
CN102527503A (en) * 2012-01-10 2012-07-04 苏木清 Ore dressing system and method for recycling tailings containing iron
CN105107617A (en) * 2015-09-22 2015-12-02 赣州金环磁选设备有限公司 Method for increasing comprehensive utilization ratio of ilmenite
CN105233976A (en) * 2015-11-05 2016-01-13 鞍钢集团矿业公司 Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method
CN105233974A (en) * 2015-11-05 2016-01-13 鞍钢集团矿业公司 Fine grinding magnetic separation-roasting-regrinding magnetic separation tailing recovery process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈虎等: ""国内外铁尾矿排放及综合利用状况探讨"", 《混凝土》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2693203C1 (en) * 2017-12-27 2019-07-01 Общество с ограниченной ответственностью "Научно-производственное региональное объединение "Урал" (ООО НПРО "Урал") Three-stage grinding line of magnetite-hematite ores
CN110292807A (en) * 2018-03-22 2019-10-01 南京梅山冶金发展有限公司 Superfine Tailing thickening dewatering process

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Application publication date: 20170201