CN104689904B - Method for separating ilmenite concentrate from vanadium titanium magnetite tailings - Google Patents
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- Y—GENERAL 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
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Abstract
The invention belongs to the field of mineral separation, and particularly relates to a method for separating ilmenite concentrate from vanadium titanium magnetite tailings. To solve the technical problem, the method includes the steps of a), performing screening with a 1.5-2.1mm screen and concentrating screen underflow to solid substance not less than 25% in content; b), subjecting the concentrated substance to strong magnetic separation to obtain ilmenite with content of TiO2 not less than 14%; c), demagnetizing and performing screening with a 0.3-0.6mm high-frequency vibrating fine screen; d), subjecting to the screen underflow to iron removal by magnetic separation; e), after iron removal, subjecting the substance to secondary enrichment to the solid substance with the content not less than 30%, performing spiral separation to the content of TiO2 being 30-35% prior to demagnetizing, and selecting the ilmenite concentrate with the content of TiO2 not less than 46% through a medium-intensity magnetic separator. With the method, the ilmenite concentrate in the tailings can be well recovered, recovery rate is high, and cost is low.
Description
Technical field
The invention belongs to ore dressing field, and in particular to a kind of method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing.
Background technology
At present now, the country selects ilmenite concentrate typically to adopt flotation flowsheet, and using needing to consume a large amount of medicines during flotation flowsheet
Agent, such as collecting agent, sulfuric acid, general production cost is in 300 to 400 yuan of ilmenite concentrates per ton；Also, after using medicament, need to throw
Enter substantial contribution carries out thickening-purification technology process to water；Meanwhile, the water of non-purified process is also containing acidity, accident or dump pair
Environmental pollution is larger.
Also, floatation process is usually the strong magnetic enrichment of high gradient, ore grinding, flotation, general 15～30 groove of flotation cell used is more
Using 4 cubic metres, 8 cubic metres even 10 cubic metres of flotation device, flotation device motor all 15 kilowatts per platform more than, flow sheet equipment
Heavier, floor space is larger, it is desirable to which mill construction must possess row and hang, and so on the one hand cause power load larger, the opposing party
Face mill construction investment is larger, causes ore dressing plant construction cost to increase.
Flotation upper size boundary is typically below 0.1 millimeter, although its p- 200 mesh grade mineral recovering effect is good, but according to
Actual production process sees that -200 mesh grade mineral contents are less than 60% in flotation concentrate；Must be single to reclaim -200 mesh
Micro-size fraction floatation process is solely adopted, the effect of the mesh of wholegrain level synthetical recovery -200 can not be so realized.
It is higher using requirement of the floatation process to post operation, medicament configuration, medicament addition etc., while using sulfuric acid
During also there is huge potential safety hazard.
Although presence spiral adds shaking table to carry out the ore dressing of wet type ilmenite concentrate, the technique ore-dressing practice rate of recovery is low, place
Reason amount is little, high cost, p- 200 mesh recovering effect extreme difference.
So, the present invention is intended to find a kind of environmentally safe, low cost, yield for the disadvantages mentioned above of prior art
A kind of beneficiation method of the ilmenite concentrate of high the advantages of.
The content of the invention
The technical problem to be solved is to provide a kind of method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing.Should
Method is comprised the following steps：
A, by the screen cloth for selecting the vanadium titano-magnetite mine tailing after iron to cross 1.5～2.1mm, extracting screen underflow is concentrated into screenings
Solid contents is not less than 25%；
B, by step a concentrate after material Jing high gradient magnetic separator magnetic separation obtain TiO2Content is not less than 14% concentrate；
C, the de- magnetic of step b gained concentrate, then the high frequency vibrating fine screen that Jing sieve apertures are 0.3～0.6mm are sieved, must be sieved
Upper thing and screenings；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, step d is not less than into 25% except the material after iron carries out secondary concentration to solid contents；
F, by the material after step e secondary concentration using spiral concentrator ore dressing to TiO2Content is 30～35%,
De- magnetic, then magnetomechanical is selected to TiO in passing through2Content is not less than 46%.
Preferably, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step c, the oversize continues ball
After mill, return again to the high frequency vibrating fine screen that sieve aperture is 0.3～0.6mm and sieved, obtain screenings and oversize, screenings is carried out
The iron removal by magnetic separation of step d, oversize return again continue ball milling, be that the high frequency vibrating fine screen of 0.3～0.6mm is sieved with sieve aperture
Point, circulated with this.
Specifically, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step d, described iron removal by magnetic separation is
Control is except secondary total Iron in Iron Ore >=40% obtained by iron.
Further, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step d, obtained by iron removal by magnetic separation
Secondary iron ore is returned and selects flowing molten iron journey to recycle.
Further, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step d, described magnetic separation is removed
The field intensity of iron is 2500～3000 Gausses.
Preferably, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, the magnetic field of the middle magnetomechanical
The Gauss of intensity 6000～6500.
Preferably, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, after step e secondary concentration
Material adopt two-stage ore discharge, obtain the mineral more than or equal to 0.1mm and be coarse grain, the mineral less than 0.1mm being particulate；Institute
The spiral concentrator stated adopts three-level spiral mineral；Coarse grain enters one section of spiral, obtain one section of spiral concentrate, one section of spiral chats,
One section of spiral mine tailing；One section of spiral chats enters two sections of spirals with particulate, obtain two sections of spiral concentrate, two sections of spiral chats, two sections
Spiral mine tailing；One section of spiral concentrate and two sections of spiral concentrate enter three sections of spirals, obtain three sections of spiral concentrate, three sections of spiral chats,
Three sections of spiral mine tailings, three sections of spiral concentrate are TiO2The material of content 30～35%.
Further, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, one section of described spiral
Mine tailing and two sections of spiral mine tailings return high gradient magnetic separator and select again.
Further, the above-mentioned method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, two sections of described spirals
Chats enters two sections of spirals and selects again.
This ore-dressing technique selects the cost of one ton of ilmenite concentrate (not contain and be dried expense) within 130 yuan, and flotation flowsheet selects one
In 400 or so (without expense is dried), spiral adds shaking table flow process to select one ton of ilmenite concentrate cost 250 or so to ton ilmenite concentrate cost
(without expense is dried)；The mineral of the mesh content of this ore-dressing technique -200 reach as high as 65% 45～60%, and ilmenite concentrate ferrotianium is total
(ferrotianium total amount is Ti0 to amount reachable more than 93%2+TFe+Fe2O3)；This ore-dressing technique rate of recovery is more than more than 45%, ranges up to
55%；And operation recovery is 30～37% in flotation；Ilmenite concentrate TiO selected by this ore-dressing technique2>=46.00%.
Specific embodiment
A kind of method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, comprises the following steps：
A, by the screen cloth for selecting the vanadium titano-magnetite mine tailing after iron to cross 1.5～2.1mm, extracting screen underflow is concentrated into screenings
Solid contents is not less than 25%；
B, by step a concentrate after material Jing high gradient magnetic separator magnetic separation obtain TiO2Content is not less than 14% concentrate；
C, the de- magnetic of step b gained concentrate, then the high frequency vibrating fine screen that Jing sieve apertures are 0.3～0.6mm are sieved, must be sieved
Upper thing and screenings；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, step d is not less than into 25% except the material after iron carries out secondary concentration to solid contents；
F, by the material after step e secondary concentration using spiral concentrator ore dressing to TiO2Content is 30～35%,
De- magnetic, then magnetomechanical is selected to TiO in passing through2Content is not less than 46%.
In order to economize in raw materials, in said method step c, described oversize can continue to return again to dither after ball milling thin
Sieve screening, get back oversize and screenings, screenings can directly carry out step d iron removal by magnetic separation, and oversize is carried out after ball milling again
High frequency vibrating fine screen screening is returned again to, is circulated with this.
In said method step d, after iron removal by magnetic separation, it is time iron ore to be selected the part come, and the part time iron ore is no longer
In participating in the ore dressing of the inventive method, but in order to economize in raw materials, the part time iron ore can be used for other and select flowing molten iron journey to reclaim
Utilize；Preferably, when full iron >=40% in secondary iron ore, this technique is not utilized；The part for leaving goes successively to step e
Carry out secondary concentration.
Further, in said method step d, the field intensity of described iron removal by magnetic separation is 2500～3000 Gausses.
Preferably, in said method step f, the Gauss of magnetic field intensity 6000～6500 of the middle magnetomechanical；In this magnetic field
Under intensity, ilmenite concentrate can fully be enriched with, while the mine tailing of middle magnetomechanical is back to two sections of spiral shells Jing after ball milling again ore grinding, de- magnetic
Rotation, on the one hand can fully achieve the monomer dissociation (monomer solution granularity is typically more than 90%) of the ilmenite that do not dissociate, the opposing party
Face enters the operation recovery that re-selection procedure can be to greatest extent improved after two sections of spirals, it is to avoid high-grade ilmenite is in flow process
In loss.
Preferably, in said method step f, the material after step e secondary concentration is first carried out two-stage ore discharge, has obtained big
It is referred to as coarse grain, the mineral less than 0.1mm in the mineral equal to 0.1mm and is referred to as particulate；Again three-level choosing is carried out using spiral concentrator
Ore deposit, enters one section of spiral by coarse grain first, obtains one section of spiral concentrate, one section of spiral chats, one section of spiral mine tailing；In one section of spiral
Ore deposit enters two sections of spirals with particulate, obtains two sections of spiral concentrate, two sections of spiral chats, two sections of spiral mine tailings；One section of spiral concentrate and
Two sections of spiral concentrate enter three sections of spirals, obtain three sections of spiral concentrate, three sections of spiral chats, three sections of spiral mine tailings, three sections of spiral essences
Ore deposit is TiO2The material of content 30～35%；Further, in order to economize in raw materials, one section of spiral mine tailing of gained and two sections
Spiral mine tailing returns high gradient magnetic separator and selects again；Two sections of spiral chats of gained enter two sections of spirals and select again.
In the inventive method, prescreening is carried out before grind grading, on the one hand can prevent the overground of ilmenite, on the other hand
Grind grading forms the closed circuit monomer dissociation for ensureing ilmenite；Except the laggard two grades of inclined plate sedimentations of iron, coarse grain enters one section of spiral, carefully
Grain directly enters two sections of spirals, so avoids loss of -200 mesh grades in one section of spiral in reuse adoption process, can maximum limit
- 200 mesh reclaimed in the middle of mineral of degree.
In the inventive method, Ti0 in the concentrate obtained by Jing high gradient magnetic separator magnetic separation2General control 14～16%, one
Ti0 in section spiral gained concentrate2General control 20% or so, two sections of spirals gained concentrate Ti02General control 26% or so,
Three sections of spiral concentrate Ti02General control 30～35%, so just can guarantee that middle magnetomechanical enrichment titanium ore grade reach 46% with
On.
In the inventive method, do not make specified otherwise, content, percentage etc. and represent percentage by weight.
Embodiment 1
A, the screen cloth that the vanadium titano-magnetite mine tailing after iron (titaniferous 7.3%, iron content 12%) mistake 1.5mm will be selected, extracting screen underflow,
Screenings is concentrated into into solid contents for 28%；
B, step a is concentrated after material by high gradient magnetic separator (1.5 meters of high gradient magnetic separators of diameter, exciting curent 800
Ampere) magnetic separation obtains TiO2The concentrate of content 15%；
It is c, the de- magnetic of step b gained concentrate, then Jing sieve apertures is (available 1.5 meters according to ore deposit amount for the high frequency vibrating fine screen of 0.4mm
Or 2 meters, or double-deck) sieved, obtain oversize and screenings；High frequency vibrating fine screen screening will be returned again to after oversize ball milling；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, except the material after iron carries out secondary concentration to solid contents it is 35% by step d；
F, the material after step e secondary concentration is carried out spiral mineral to TiO2Content 33%, takes off magnetic, then in passing through
Magnetomechanical (using 0.9 meter of diameter, 2.1 meters of length, magnetic field intensity >=6500 Gauss) is selected to TiO2Content 46.5%, operation recovery
For 48%, -200 mesh are 55% in ilmenite concentrate.
Embodiment 2
A, the screen cloth that the vanadium titano-magnetite mine tailing after iron (titaniferous 7.0%, iron content 11%) mistake 1.5mm will be selected, extracting screen underflow,
Screenings is concentrated into into solid contents for 28%；
B, step a is concentrated after material by high gradient magnetic separator (1.5 meters of high gradient magnetic separators of diameter, exciting curent 800
Ampere) magnetic separation obtains TiO2The concentrate of content 14%；
It is c, the de- magnetic of step b gained concentrate, then Jing sieve apertures is (available 1.5 meters according to ore deposit amount for the high frequency vibrating fine screen of 0.4mm
Or 2 meters, or double-deck) sieved, obtain oversize and screenings；High frequency vibrating fine screen screening will be returned again to after oversize ball milling；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, except the material after iron carries out secondary concentration to solid contents it is 35% by step d；
F, the material after step e secondary concentration is carried out spiral mineral to TiO2Content 32.7%, takes off magnetic, then passes through
Middle magnetomechanical (using 0.9 meter of diameter, 2.1 meters of length, magnetic field intensity >=6500 Gauss) is selected to TiO2Content 46.3%, operation is reclaimed
Rate is 45%, and -200 mesh are 51% in ilmenite concentrate.
Embodiment 3
A, the screen cloth that the vanadium titano-magnetite mine tailing after iron (titaniferous 11.0%, iron content 13%) mistake 1.5mm will be selected, under taking sieve
Thing, solid contents is concentrated into for 28% by screenings；
B, step a is concentrated after material by high gradient magnetic separator (1.5 meters of high gradient magnetic separators of diameter, exciting curent 800
Ampere) magnetic separation obtains TiO2The concentrate of content 15%；
It is c, the de- magnetic of step b gained concentrate, then Jing sieve apertures is (available 1.5 meters according to ore deposit amount for the high frequency vibrating fine screen of 0.4mm
Or 2 meters, or double-deck) sieved, obtain oversize and screenings；High frequency vibrating fine screen screening will be returned again to after oversize ball milling；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, except the material after iron carries out secondary concentration to solid contents it is 35% by step d；
F, the material after step e secondary concentration is carried out spiral mineral to TiO2Content 33.5%, takes off magnetic, then passes through
Middle magnetomechanical (using 0.9 meter of diameter, 2.1 meters of length, magnetic field intensity >=6500 Gauss) is selected to TiO2Content 47%, operation recovery
For 51%, -200 mesh are 55% in ilmenite concentrate.
Table 1
| Gained ilmenite concentrate TiO2Content | The rate of recovery | - 200 mesh contents | Cost | |
| Embodiment 1 | 46.50% | 48% | 55% | 125 yuan |
| Embodiment 2 | 46.30% | 45% | 51% | 130 yuan |
| Embodiment 3 | 47% | 51% | 55% | 118 yuan |
| Prior art 1 | 38～40% | 28% | 15% | 100 yuan |
| Prior art 2 | More than 42% | 23% | 10% | 120 yuan |
To sum up table 1 can be seen that the ilmenite concentrate content of titanium dioxide height that the inventive method is filtered out, and rate of recovery height has
The nearly twice of method, the content ratio of -200 mesh is more than 4 times of existing method, and cost used is suitable with existing method, further
Illustrate that the inventive method has a good application prospect.
Claims (5)
1. the method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, it is characterised in that：Comprise the following steps：
A, by the screen cloth for selecting the vanadium titano-magnetite mine tailing after iron to cross 1.5～2.1mm, screenings is concentrated into solid by extracting screen underflow
Thing content is not less than 25%；
B, by step a concentrate after material Jing high gradient magnetic separator magnetic separation obtain TiO2Content is not less than 14% concentrate；
C, the de- magnetic of step b gained concentrate, then the high frequency vibrating fine screen that Jing sieve apertures are 0.3～0.6mm are sieved, obtained oversize
And screenings；
D, the screenings of step c is carried out into iron removal by magnetic separation；
E, step d is not less than into 25% except the material after iron carries out secondary concentration to solid contents；
F, by the material after step e secondary concentration using spiral concentrator ore dressing to TiO2Content is 30～35%, takes off magnetic,
Magnetomechanical is selected to TiO in passing through again2Content is not less than 46%；
Material after step e secondary concentration adopts two-stage ore discharge, obtains the mineral more than or equal to 0.1mm and is coarse grain, is less than
The mineral of 0.1mm are particulate；Described spiral concentrator adopts three-level spiral mineral；Coarse grain enters one section of spiral, obtains one section
Spiral concentrate, one section of spiral chats, one section of spiral mine tailing；One section of spiral chats enters two sections of spirals with particulate, obtains two sections of spirals
Concentrate, two sections of spiral chats, two sections of spiral mine tailings；One section of spiral concentrate and two sections of spiral concentrate enter three sections of spirals, obtain three sections
Spiral concentrate, three sections of spiral chats, three sections of spiral mine tailings, three sections of spiral concentrate are TiO2The material of content 30～35%.
2. the method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterised in that：In step c,
The oversize continues after ball milling, returns again to the high frequency vibrating fine screen that sieve aperture is 0.3～0.6mm and is sieved, obtain screenings and
Oversize, screenings carries out the iron removal by magnetic separation of step d, oversize return again continue ball milling, with sieve aperture be 0.3～0.6mm height
Frequency vibration dusting cover is sieved, and is circulated with this.
3. the method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterised in that：In step d,
Described iron removal by magnetic separation is control except secondary total Iron in Iron Ore >=40% obtained by iron.
4. the method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterised in that：In step d,
The field intensity of described iron removal by magnetic separation is 2500～3000 Gausses.
5. the method for selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterised in that：In step f,
The field intensity of described middle magnetomechanical is 6000～6500 Gausses.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105880008B (en) * | 2016-05-27 | 2018-08-24 | 泗水惠丰农业开发工程有限公司 | It is dry to throw tailing secondary sorting technique |
| CN107377196B (en) * | 2017-07-21 | 2018-07-24 | 云南中钛科技有限公司 | A kind of sand ilmenite selects tail processing system and treatment process |
| CN109046760B (en) * | 2018-09-26 | 2021-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recycling vanadium titano-magnetite tailings |
| CN110665634A (en) * | 2019-11-13 | 2020-01-10 | 攀枝花钢城集团米易瑞地矿业有限公司 | Method for selecting titanium from iron ore tailings of extremely poor exterior vanadium titano-magnetite |
| CN112090578B (en) * | 2020-09-09 | 2022-03-11 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for preparing ultrapure iron concentrate by using magnetite concentrate |
| CN116273446B (en) * | 2023-02-23 | 2024-01-16 | 中国地质科学院矿产综合利用研究所 | Mineral separation method for recycling ilmenite from vanadium titano-magnetite total tailings |
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| RU2123886C1 (en) * | 1996-06-18 | 1998-12-27 | Трофимов Николай Александрович | Method of concentrating complex ores |
| US6006920A (en) * | 1997-05-09 | 1999-12-28 | Dry Branch Kaolin Company | Brightness, reduced impurity clays and methods of making same |
| CN100443191C (en) * | 2005-10-19 | 2008-12-17 | 重庆钢铁(集团)有限责任公司 | Floatation method of whole grade ilmenite |
| CN101403036B (en) * | 2008-12-01 | 2011-12-14 | 唐兆青 | Method for separating titanium, iron ore |
| CN103586125A (en) * | 2012-08-15 | 2014-02-19 | 临沂鲁兴钛业股份有限公司 | Tailing titanium selecting method through gravity |
| CN104394993B (en) * | 2013-02-01 | 2016-07-13 | 华北理工大学 | A kind of preprocess method of ilmenite iron selection tailings |
| CN103706463B (en) * | 2013-12-19 | 2016-06-29 | 攀钢集团矿业有限公司 | A kind of titanium separation method |
| CN103736588B (en) * | 2014-01-16 | 2014-12-17 | 玉溪大红山矿业有限公司 | Efficient beneficiation method of comprehensively recovering low-grade vanadium titano-magnetite |
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