CN105233977B - Magnetic separation recovery mine tailing technique is regrinded in magnetic separation circulation roasting - Google Patents

Magnetic separation recovery mine tailing technique is regrinded in magnetic separation circulation roasting Download PDF

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CN105233977B
CN105233977B CN201510742974.1A CN201510742974A CN105233977B CN 105233977 B CN105233977 B CN 105233977B CN 201510742974 A CN201510742974 A CN 201510742974A CN 105233977 B CN105233977 B CN 105233977B
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magnetic
weak
concentrate
feeds
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CN105233977A (en
Inventor
刘双安
杨晓峰
窦国语
宋均利
梅灿国
孟娜
唐昊
刘盛辰
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Angang Group Mining Co Ltd
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Angang Group Mining Co Ltd
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    • 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
    • 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

Magnetic separation recovery mine tailing technique is regrinded the present invention relates to a kind of magnetic separation circulation roasting, it is characterized in that using magnetic separation, three sections of cyclone closed circuit grinding classification operations, circulation roasting, regrind five sections of low intensity magnetic separations, the concentration operation that the present invention returns to the mine tailing of three sections of weak magnetics, four sections of weak magnetics, five sections of weak magnetics before roasting, it is calcined, ore grinding, is sorted again, can be under grinding particle size relatively thick grinding particle size, realize effective recovery to iron mineral, tailings grade is relatively low, so that concentrate grade more than 63% is obtained, the good index of metal recovery rate more than 57%.

Description

Magnetic separation recovery mine tailing technique is regrinded in magnetic separation-circulation is calcined-
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of preenrichment-circulation is calcined-regrinds magnetic separation recovery mine tailing Technique.
Background technology
At present using select factory's generation the 10%~15% of " stage grinding, coarse and fine separation, weight-magnetic-floating combined process flow ", ore grinding Granularity is mainly russet iron and Armco magnetic iron for the iron mineral being lost in the synthesis mine tailing of -0.074mm60%~70%, to comprehensive mine tailing The preferable technique of the current effect of recovery be:Scanned with integrating mine tailing using two sections of spiral chutes, permanent magnetism, spiral shell essence, permanent magnetism essence are mixed It is combined into after rough concentrate, rough concentrate ore grinding and uses weak magnetic, Qiang Ci again, reverse flotation or centrifuge technique is selected.Using " spiral chute, forever Magnetic-ore grinding-strong magnetic, centrifuge technique " flow integrates ore deposit to bloodstone and sorted, and is 92.5%- in grinding particle size The sorting index obtained during 0.046mm is:To ore deposit grade 12.63%, concentrate grade 67.95%, concentrate yield 4.00%, the rate of recovery 21.52%, tailings grade 10.33%, but be up to due to integrating distributive law of the iron mineral in mine tailing in below 0.037mm grades More than 70%, wherein the distributive law in below 0.01mm grades is 10%~20%, the main iron mineral granularity in comprehensive mine tailing is very Carefully.Therefore tailings grade is higher after comprehensive mine tailing is sorted through " spiral chute, permanent magnetism-ore grinding-strong magnetic, centrifuge technique " asks Topic can not be solved, and cause the rate of recovery to be difficult to further raising." magnetic separation-roasting-magnetic separation process " to mine tailing using strong magnetic by being entered Row is sorted to roasted ore using weak magnetic again after obtained high intensity magnetic mineral is all calcined after sorting, and although the technique carry The high rate of recovery, but because Armco magnetic iron distributive law is 15%~40% in mine tailing, and this portioned product should not enter into complex process(Cause Need to concentrate before roasting, filter, dry), the high roasting technique of high energy consumption, cost handled.
The content of the invention
It can be mainly superfine grade to target minreal the mine tailing containing a variety of iron minerals enters it is an object of the invention to provide a kind of Row economical and effective is reclaimed, so that the raising rate of recovery is realized, while the magnetic separation-circulation is calcined-for reducing effective recovery of energy consumption is regrinded Magnetic separation recovery mine tailing technique.
The purpose of the present invention is realized by following technical proposals:
Magnetic separation recovery mine tailing technique is regrinded in the magnetic separation-circulation is calcined-of the present invention, including by grade is 10%~15% granularity One section of drum magnetic separator progress magnetic concentration working, the tail of one section of drum magnetic separator are fed for the synthesis mine tailing of -0.074mm60%~70% Ore deposit feeds one section of vertical-ring magnetic separator and carries out magnetic concentration working, the concentrate conjunction of the concentrate and one section of vertical-ring magnetic separator of one section of drum magnetic separator And feed the closed circuit grinding classification operation that one section of cyclone and one section of ball mill are constituted, one section of 90%~95%-0.074mm of granularity The overflow of cyclone feeds two sections of drum magnetic separators and carries out magnetic concentration working, it is characterised in that also comprise the following steps:
1)The concentrate of two sections of drum magnetic separators feeds two sections of cyclones, and the sand setting of two sections of cyclones feeds two sections of tower mills, two The ore discharge of section tower mill returns to two sections of cyclones and constitutes closed circuit grinding system, and more than granularity 80%-0.025mm two sections of cyclones overflow Stream feeds one section of weak magnetic and sorted, and one section of weak magnetic tail ore deposit feeds one section of concentrator together with two sections of drum magnetic separator mine tailings and entered Row concentration operation, the overflow of one section of concentrator is used as recirculated water, and concentration feeds two for the underflow of 30~40% one section of close machine Section vertical-ring magnetic separator carries out magnetic concentration working, and the concentrate of two sections of vertical-ring magnetic separators feeds two sections of concentrators and carries out concentration operation;
2)The overflow of two sections of concentrators is used as recirculated water, and the underflow by concentration for 55~60% two sections of concentrators is given Enter filter to be filtered, obtain filter cake for rough concentrate, its moisture content is 9%~13%, grade be 25~33%, yield be 15~ 20%;
3)Described rough concentrate is fed into suspending magnetization roasting furnace by belt and carries out suspension roasting operation;Its heating-up temperature is 500 DEG C~600 DEG C, make after moisture content reaches less than 2%, be passed through CO reducing gas be reduced to Armco magnetic iron distributive law 88% with On Armco magnetic iron mineral;
4)Armco magnetic iron mineral of the post-job Armco magnetic iron distributive law of suspension roasting more than 88% are fed into three sections of cyclones to close Road grinding-classification operation, the sand setting of three sections of cyclones feeds three sections of ore grindings, and three sections of ore grindings use tower grinding machine, and the ore discharge of tower mill is returned Three sections of cyclones constitute closed circuit grinding system, and granularity feeds two sections of weak magnetics for -0. more than 025mm80% three sections of cyclone overflows Machine;
6)One section of weak magnetic machine and two sections of weak magnetic machine concentrate, which merge, feeds three sections of weak magnetic machines, and the concentrate of three sections of weak magnetic machines feeds four Section weak magnetic machine, the concentrate of four sections of weak magnetic machines feeds five sections of weak magnetic machines, and five sections of weak magnetic machine concentrate are final concentrate, its concentrate grade More than 63%, metal recovery rate more than 57%, one section of vertical-ring magnetic separator, two sections of vertical-ring magnetic separator mine tailings and two sections of weak magnetic tail ore deposits are closed And be the true tailings of grade 5%~7%, three sections of weak magnetic tail ore deposits, four sections of weak magnetic tail ore deposits and five sections of weak magnetic tail ore deposits, which merge, to be returned Two sections of two sections of concentrators are concentrated again, suspension roasting and regrind magnetic separation constitute circulation roasting.
The magnetic induction intensity of one section of described drum magnetic separator is 300~500mT, and the magnetic induction of one section of vertical-ring magnetic separator is strong Spend 300~500mT.
The magnetic induction intensity of two sections of described drum magnetic separators is 150~180mT, and the magnetic induction of two sections of vertical-ring magnetic separators is strong Spend 300~500mT.
Five sections of described weak magnetic machines use magnetovibration highly-effective magnetic separator.
It is an advantage of the invention that:
The present invention as a result of above-mentioned magnetic separation ,-circulation is calcined-regrinds magnetic separation recovery mine tailing technique, using three sections of weak magnetics, The concentration operation that four sections of weak magnetics, the mine tailing of five sections of weak magnetics are returned to before roasting, is calcined, ore grinding, is sorted again, can be in ore grinding Under granularity relatively thick grinding particle size, obtain grade more than 63%, the concentrate of concentrate mineral products rate more than 10%, tailings grade 6% with Under, the good index of metal recovery rate more than 57%, its rate of recovery compared with traditional handicraft improve more than 30 percentage points, simultaneously because One section of weak magnetic machine concentrate does not enter roasting operation, roasting operation treating capacity is reduced 15%~40%, has saved energy consumption, reduced life Produce cost.
Brief description of the drawings
Fig. 1 regrinds the flow chart of magnetic separation recovery mine tailing technique for the magnetic separation-circulation is calcined-of the present invention.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, magnetic separation recovery mine tailing technique is regrinded in the magnetic separation of the invention-circulation is calcined-of the present invention, including by product Position is that the synthesis mine tailing that 10%~15% granularity is -0.074mm60%~70% feeds one section of drum magnetic separator progress magnetic concentration working, one The mine tailing of section drum magnetic separator feeds one section of vertical-ring magnetic separator and carries out magnetic concentration working, the concentrate of one section of drum magnetic separator and one section it is vertical The concentrate of ring magnetic separator, which merges, feeds one section of cyclone and the closed circuit grinding classification operation of one section of ball mill composition, and granularity 90%~ The overflow of 95%-0.074mm one section of cyclone feeds two sections of drum magnetic separators and carries out magnetic concentration working, it is characterised in that also include The following steps:
1)The concentrate of two sections of drum magnetic separators feeds two sections of cyclones, and the sand setting of two sections of cyclones feeds two sections of tower mills, two The ore discharge of section tower mill returns to two sections of cyclones and constitutes closed circuit grinding system, and more than granularity 80%-0.025mm, the grinding particle size exists It is industrial relatively easy to implement, and under the granularity most of strongly magnetic mineral can be made to be separated with weak magnetic mineral and gangue, because This two sections of cyclone overflows feed one section of weak magnetic and sorted, and one section of weak magnetic tail ore deposit is given together with two sections of drum magnetic separator mine tailings Enter one section of concentrator and carry out concentration operation, the overflow of one section of concentrator is used as recirculated water, concentration is close for one section of 30~40% The underflow of machine feeds two sections of vertical-ring magnetic separators and carries out magnetic concentration working, and the concentrate of two sections of vertical-ring magnetic separators feeds two sections of concentrator progress Concentrate operation;The magnetic induction intensity of one section of described drum magnetic separator is 300~500mT, the magnetic induction of one section of vertical-ring magnetic separator 300~500mT of intensity;The magnetic induction intensity of two sections of described drum magnetic separators is 150~180mT, two sections of vertical-ring magnetic separators 300~500mT of magnetic induction intensity;
2)The overflow of two sections of concentrators is used as recirculated water, and the underflow by concentration for 55%~60% two sections of concentrators is given Enter filter to be filtered, obtain filter cake for rough concentrate, its moisture content is 9%~13%, grade be 25%~33%, yield be 15~ 20%;
3)Described rough concentrate is fed into suspending magnetization roasting furnace by belt and carries out suspension roasting operation;Its heating-up temperature is 500 DEG C~600 DEG C, make after moisture content reaches less than 2%, be passed through CO reducing gas be reduced to Armco magnetic iron distributive law 88% with On Armco magnetic iron mineral;
4)Armco magnetic iron mineral of the post-job Armco magnetic iron distributive law of suspension roasting more than 88% are fed into three sections of cyclones to close Road grinding-classification operation, the sand setting of three sections of cyclones feeds three sections of ore grindings, and three sections of ore grindings use tower grinding machine, and the ore discharge of tower mill is returned Three sections of cyclones constitute closed circuit grinding system, and more than the 025mm80% of grinding particle size -0., the grinding particle size is industrially relatively easy In realization, and under the granularity most of strongly magnetic mineral can be made to be separated with weak magnetic mineral and gangue, therefore three sections of cyclones Overflow feeds two sections of weak magnetic machines;
5)One section of weak magnetic machine and two sections of weak magnetic machine concentrate, which merge, feeds three sections of weak magnetic machines, and the concentrate of three sections of weak magnetic machines feeds four Section weak magnetic machine, the concentrate of four sections of weak magnetic machines feeds five sections of weak magnetic machines, and five sections of described weak magnetic machines use magnetovibration highly-effective magnetic separator, Five sections of weak magnetic machine concentrate are final concentrate, its concentrate grade more than 63%, metal recovery rate more than 57%, one section of vertical-ring magnetic separator, Two sections of vertical-ring magnetic separator mine tailings and two sections of weak magnetic tail ore deposits merge into the true tailings of grade 5%~7%, three sections of weak magnetic tail ore deposits, four There are part strongly magnetic mineral and weak magnetic mineral and the intergrowth of gangue in section weak magnetic tail ore deposit and five sections of weak magnetic tail ore deposits, then pass through Roasting, ore grinding, weak choosing can to its it is further reclaim, therefore three sections of weak magnetic tail ore deposits, four sections of weak magnetic tail ore deposits and five sections of weak magnetic machines Mine tailing merge return two sections of two sections of concentrators concentrated again, suspension roasting and regrind magnetic separation constitute circulation roasting.
The present invention is the characteristics of five sections of weak magnetic machines use magnetovibration highly-effective magnetic separator, the equipment:Sorting in area has some Magnetic-assemblying area, Shan Zhen areas, the magnetic mineral formation magnetic linkage when ore pulp enters sorting area by magnetic-assemblying area, magnetic linkage move downward through sudden strain of a muscle Shake area when and smashed again, non magnetic ore is overflowed with ascending current, so by multiple poly- magnetic, dodge and shake, make gangue with Iron mineral is sufficiently separated, and realizes effective recovery to superfine rank iron mineral.
The concentration operation that three sections of weak magnetics of the technique, four sections of weak magnetics, mine tailings of five sections of weak magnetics are returned to before roasting, enters again Row roasting, ore grinding, sort, can be under grinding particle size relatively thick grinding particle size, effective recovery of the realization to iron mineral, mine tailing Grade is relatively low.
The parameter such as grinding particle size, magnetic field intensity, thickness grading granularity of the present invention, will pass through according to the property of ore Experimental studies results are determined.
Using the technique of the present invention, the high efficiente callback of iron in mine tailing is realized, its rate of recovery improves 30 compared with traditional handicraft It is more than percentage point.

Claims (4)

1. a kind of magnetic separation-circulation is calcined-regrinds magnetic separation recovery mine tailing technique, including by grade be 10%~15% granularity for- The synthesis mine tailing that 0.074mm accounts for 60%~70% feeds one section of drum magnetic separator progress magnetic concentration working, the tail of one section of drum magnetic separator Ore deposit feeds one section of vertical-ring magnetic separator and carries out magnetic concentration working, the concentrate conjunction of the concentrate and one section of vertical-ring magnetic separator of one section of drum magnetic separator And the closed circuit grinding classification operation that one section of cyclone and one section of ball mill are constituted is fed, granularity is that -0.074mm accounts for 90%~95% The overflow of one section of cyclone feed two sections of drum magnetic separators and carry out magnetic concentration workings, it is characterised in that also comprise the following steps:
1)The concentrate of two sections of drum magnetic separators feeds two sections of cyclones, and the sand setting of two sections of cyclones feeds two sections of tower mills, two sections of towers The ore discharge of mill returns to two sections of cyclones and constitutes closed circuit grinding system, and granularity is overflow for -0.025mm two sections of cyclones for accounting for more than 80% Stream feeds one section of weak magnetic and sorted, and one section of weak magnetic tail ore deposit feeds one section of concentrator together with two sections of drum magnetic separator mine tailings and entered Row concentration operation, the overflow of one section of concentrator is used as recirculated water, and concentration feeds for the underflow of 30%~40% one section of close machine Two sections of vertical-ring magnetic separators carry out magnetic concentration working, and the concentrate of two sections of vertical-ring magnetic separators feeds two sections of concentrators and carries out concentration operation;
2)The overflow of two sections of concentrators is used as recirculated water, and the underflow by concentration for 55%~60% two sections of concentrators was fed Filter is filtered, and obtains filter cake for rough concentrate, its moisture content is 9%~13%, and grade is that 25~33%, yield is 15~20%;
3)Described rough concentrate is fed into suspending magnetization roasting furnace by belt and carries out suspension roasting operation;Its heating-up temperature is 500 DEG C~600 DEG C, make after moisture content reaches less than 2%, to be passed through CO reducing gas and be reduced to Armco magnetic iron distributive law more than 88% Armco magnetic iron mineral;
4)Armco magnetic iron mineral of the post-job Armco magnetic iron distributive law of suspension roasting more than 88% are fed into the closed circuit mill of three sections of cyclones Ore deposit graded operation, the sand setting of three sections of cyclones feeds three sections of ore grindings, and three sections of ore grindings use tower grinding machine, and the ore discharge of tower mill returns to three sections Cyclone constitutes closed circuit grinding system, and granularity feeds two sections of weak magnetics for -0. 025mm three sections of cyclone overflows for accounting for more than 80% Machine;
5)One section of weak magnetic machine and two sections of weak magnetic machine concentrate merge the three sections of weak magnetic machines that feed, the concentrate of three sections of weak magnetic machines feed four sections it is weak Magnetomechanical, the concentrate of four sections of weak magnetic machines feeds five sections of weak magnetic machines, and five sections of weak magnetic machine concentrate are final concentrate, its concentrate grade 63% with On, metal recovery rate more than 57%, one section of vertical-ring magnetic separator, two sections of vertical-ring magnetic separator mine tailings and two sections of weak magnetic tail ore deposits are merged into The true tailings of grade 5%~7%, three sections of weak magnetic tail ore deposits, four sections of weak magnetic tail ore deposits and five sections of weak magnetic tail ore deposits, which merge, returns to two sections Concentrator is concentrated again, suspension roasting and regrind magnetic separation constitute circulation roasting.
2. magnetic separation-circulation is calcined-according to claim 1 regrinds magnetic separation recovery mine tailing technique, it is characterised in that described The magnetic induction intensity of one section of drum magnetic separator is 300~500mT, 300~500mT of magnetic induction intensity of one section of vertical-ring magnetic separator.
3. magnetic separation-circulation is calcined-according to claim 1 regrinds magnetic separation recovery mine tailing technique, it is characterised in that described The magnetic induction intensity of two sections of drum magnetic separators is 150~180mT, 300~500mT of magnetic induction intensity of two sections of vertical-ring magnetic separators.
4. magnetic separation-circulation is calcined-according to claim 1 regrinds magnetic separation recovery mine tailing technique, it is characterised in that described Five sections of weak magnetic machines use magnetovibration highly-effective magnetic separator.
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CN107365904B (en) * 2017-07-11 2019-01-25 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of iron ore shaft roasting magnetic separation flotation tailing recycling technique
CN107546435A (en) * 2017-07-17 2018-01-05 中航锂电(洛阳)有限公司 A kind of physical purification method of lithium ion battery recovery positive mix
CN108480036A (en) * 2018-03-07 2018-09-04 鞍钢集团矿业有限公司 A kind of method of pre-selection-roasting-magnetic heavy industry skill recycling magnetic tailing
CN108672071B (en) * 2018-05-07 2019-11-08 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of speculum iron is mixed into the magnetization sorting process of artificial magnet's kind

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CN102284359B (en) * 2011-08-08 2013-03-20 鞍钢集团矿业公司 Process for roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite
CN102728453B (en) * 2012-06-17 2013-08-07 鞍钢集团矿业设计研究院 New technology for sorting lean hematite and magnetite orecontaining iron carbonate
CN104128259B (en) * 2014-07-28 2016-06-01 鞍钢集团矿业公司 Anshan type is containing the iron carbonate single magnetic separation process of chromium depleted zone stone
CN104437826A (en) * 2014-09-15 2015-03-25 中冶北方(大连)工程技术有限公司 Separation technology of specularite after reduction roasting
CN104437827B (en) * 2014-09-15 2017-02-15 中冶北方(大连)工程技术有限公司 Specularite dust ore dressing technology
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