CN104689904A - Method for separating ilmenite concentrate from vanadium titanium magnetite tailings - Google Patents
Method for separating ilmenite concentrate from vanadium titanium magnetite tailings Download PDFInfo
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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, be specifically related to a kind of method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing.
Background technology
Now current, the domestic ilmenite concentrate that selects generally adopts flotation flowsheet, and adopts in flotation flowsheet process and need to consume a large amount of medicament, and as collecting agent, sulfuric acid etc., general production cost is at 300 to 400 yuan of ilmenite concentrates per ton; Further, after making with medicament, need to drop into substantial contribution and thickening-purification technology process is carried out to water; Meanwhile, the water of non-purified treatment also containing acid, accident or dump environmental pollution larger.
And, floatation process is generally the strong magnetic enrichment of high gradient, ore grinding, flotation, general 15 ~ 30 grooves of flotation cell used, many employings 4 cubic metres, 8 cubic metres even flotation device of 10 cubic metres, flotation device motor is all more than 15 kilowatts of every platforms, flow sheet equipment is heavier, floor space is comparatively large, requires that mill construction must possess row and hang, causes power load larger so on the one hand, mill construction investment is comparatively large on the other hand, causes ore dressing plant construction cost to increase.
Flotation upper size boundary is generally below 0.1 millimeter, although its p-200 order grade mineral recovering effects are good, see according to actual production process, in flotation concentrate ,-200 order grade mineral contents are all no more than 60%; Micro-size fraction floatation process must be adopted separately to reclaim-200 orders, wholegrain level synthetical recovery-200 object effect can not be realized like this.
Adopt the requirement of floatation process to post operation, medicament configuration, medicament interpolation etc. higher, in the process using sulfuric acid, also there is huge potential safety hazard simultaneously.
Although existence spiral adds the ore dressing that shaking table carries out wet type ilmenite concentrate, this technique ore-dressing practice rate of recovery is low, and treating capacity is little, and cost is high, p-200 order recovering effect extreme differences.
So, the present invention is directed to the above-mentioned shortcoming of prior art, a kind of environmentally safe, cost are low for finding, the beneficiation method of a kind of ilmenite concentrate of yield advantages of higher.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing.The method comprises the following steps:
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron selected to cross 1.5 ~ 2.1mm, extracting screen underflow, is concentrated into solid contents by screenings and is not less than 25%;
B, step a is concentrated after material obtain TiO through high gradient magnetic separator magnetic separation
2content is not less than the concentrate of 14%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen that sieve aperture is 0.3 ~ 0.6mm, obtain oversize and screenings;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration be not less than 25% to solid contents;
F, adopt spiral concentrator ore dressing to TiO the material after step e secondary concentration
2content is 30 ~ 35%, de-magnetic, then in passing through, magnetic machine is selected to TiO
2content is not less than 46%.
Preferably, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step c, after described oversize continues ball milling, returning sieve aperture is again that the high frequency vibrating fine screen of 0.3 ~ 0.6mm sieves, and obtain screenings and oversize, screenings carries out the iron removal by magnetic separation of steps d, oversize returns again continuation ball milling, is that the high frequency vibrating fine screen of 0.3 ~ 0.6mm sieves with sieve aperture, circulates with this.
Concrete, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in steps d, described iron removal by magnetic separation is secondary total Iron in Iron Ore >=40% controlling deironing gained.
Further, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in steps d, the secondary iron ore of iron removal by magnetic separation gained is returned and is selected flowing molten iron journey to recycle.
Further, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in steps d, the field intensity of described iron removal by magnetic separation is 2500 ~ 3000 Gausses.
Preferably, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, magnetic field intensity 6000 ~ 6500 Gauss of described middle magnetic machine.
Preferably, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, adopts two-stage ore discharge by the material after step e secondary concentration, and the mineral obtaining being more than or equal to 0.1mm are coarse grain, be less than the mineral of 0.1mm is particulate; Described spiral concentrator adopts three grades of spiral minerals; Coarse grain enters one section of spiral, obtains one section of spiral concentrate, one section of spiral chats, one section of spiral mine tailing; One section of spiral chats and particulate enter two sections of spirals, obtain 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, and obtain three sections of spiral concentrate, three sections of spiral chats, three sections of spiral mine tailings, three sections of spiral concentrate are TiO
2the material of content 30 ~ 35%.
Further, the above-mentioned method 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.
Further, the above-mentioned method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing, in step f, two sections of described spiral chats enter two sections of spirals and select.
This ore-dressing technique selects the cost of one ton of ilmenite concentrate (not containing dry expense) within 130 yuan, and flotation flowsheet selects one ton of ilmenite concentrate cost in about 400 (not containing dry expense), spiral adds shaking table flow process and selects one ton of ilmenite concentrate cost in about 250 (not containing dry expense); The mineral of this ore-dressing technique-200 order content, 45 ~ 60%, reach as high as 65%, and ilmenite concentrate ferrotianium total amount can reach more than 93%, and (ferrotianium total amount is Ti0
2+ TFe+Fe
2o
3); This ore-dressing technique rate of recovery is greater than more than 45%, ranges up to 55%; And in flotation operation recovery 30 ~ 37%; Ilmenite concentrate TiO selected by this ore-dressing technique
2>=46.00%.
Detailed description of the invention
Select a method for ilmenite concentrate in vanadium titano-magnetite mine tailing, comprise the following steps:
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron selected to cross 1.5 ~ 2.1mm, extracting screen underflow, is concentrated into solid contents by screenings and is not less than 25%;
B, step a is concentrated after material obtain TiO through high gradient magnetic separator magnetic separation
2content is not less than the concentrate of 14%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen that sieve aperture is 0.3 ~ 0.6mm, obtain oversize and screenings;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration be not less than 25% to solid contents;
F, adopt spiral concentrator ore dressing to TiO the material after step e secondary concentration
2content is 30 ~ 35%, de-magnetic, then in passing through, magnetic machine is selected to TiO
2content is not less than 46%.
In order to economize in raw materials, in said method step c, described oversize returns high frequency vibrating fine screen screening again after can continuing ball milling, to get back oversize and screenings, screenings directly can carry out steps d iron removal by magnetic separation, and oversize returns high frequency vibrating fine screen screening again after carrying out ball milling again, circulate with this.
In said method steps d, after iron removal by magnetic separation, selected part is out time iron ore, and this part time iron ore no longer participates in the ore dressing of the inventive method, but in order to economize in raw materials, this part time iron ore can be used for other and selects flowing molten iron journey to recycle; Preferably, when full iron >=40% in secondary iron ore, this technique does not utilize; The part left continues to enter step e and carries out secondary concentration.
Further, in said method steps d, the field intensity of described iron removal by magnetic separation is 2500 ~ 3000 Gausses.
Preferably, in said method step f, magnetic field intensity 6000 ~ 6500 Gauss of described middle magnetic machine; Under this magnetic field intensity, ilmenite concentrate can fully enrichment, simultaneously, the mine tailing of magnetic machine is back to two sections of spirals after ball milling again ore grinding, de-magnetic, can realize on the one hand not dissociating the monomer dissociation (monomer solution granularity is generally more than 90%) of ilmenite completely, the operation recovery of re-selection procedure can be improved after entering two sections of spirals on the other hand to greatest extent, avoid the loss on stream of high-grade ilmenite.
Preferably, in said method step f, the material after step e secondary concentration is first carried out two-stage ore discharge, obtain the mineral being more than or equal to 0.1mm and be called coarse grain, be less than the mineral of 0.1mm and be called particulate; Adopt spiral concentrator to carry out three grades of ore dressings again, first coarse grain is entered 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 and particulate enter two sections of spirals, obtain 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, and obtain three sections of spiral concentrate, three sections of spiral chats, three sections of spiral mine tailings, three sections of spiral concentrate are TiO
2the material of content 30 ~ 35%; Further, in order to economize in raw materials, one section of spiral mine tailing of gained and two sections of spiral mine tailings return high gradient magnetic separator and select; Two sections of spiral chats of gained enter two sections of spirals and select.
In the inventive method, carry out prescreening before grind grading, can stop the overground of ilmenite on the one hand, grind grading forms the closed circuit monomer dissociation ensureing ilmenite on the other hand; The laggard secondary inclined plate sedimentation of deironing, coarse grain enters one section of spiral, and particulate directly enters two sections of spirals, doing so avoids-200 losses of order grade in one section of spiral in reuse adoption process, can reclaim-200 orders in the middle of mineral to greatest extent.
In the inventive method, Ti0 in the concentrate of high gradient magnetic separator magnetic separation gained
2general control 14 ~ 16%, Ti0 in one section of spiral gained concentrate
2general control about 20%, two sections of spiral gained concentrate Ti0
2general control about 26%, three sections of spiral concentrate Ti0
2general control is 30 ~ 35%, and in such guarantee, magnetic machine enrichment titanium ore grade reaches more than 46%.
In the inventive method, do not make specified otherwise, content, percentage etc. all represents percentage by weight.
Embodiment 1
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron (titaniferous 7.3%, iron content 12%) selected to cross 1.5mm, extracting screen underflow, screenings being concentrated into solid contents is 28%;
B, step a is concentrated after material high gradient magnetic separator (diameter 1.5 meters of high gradient magnetic separators, exciting curent 800 amperes) magnetic separation is obtained TiO
2the concentrate of content 15%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen (according to available 1.5 meters or 2 meters of ore deposit amount, or double-deck) that sieve aperture is 0.4mm, obtain oversize and screenings; High frequency vibrating fine screen screening will be returned again after oversize ball milling;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration to solid contents is 35%;
F, the material after step e secondary concentration is carried out spiral mineral to TiO
2content 33%, de-magnetic, then in passing through, magnetic machine (with diameter 0.9 meter, length 2.1 meters, magnetic field intensity>=6500 Gauss) is selected to TiO
2content 46.5%, operation recovery is 48%, and in ilmenite concentrate ,-200 orders are 55%.
Embodiment 2
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron (titaniferous 7.0%, iron content 11%) selected to cross 1.5mm, extracting screen underflow, screenings being concentrated into solid contents is 28%;
B, step a is concentrated after material high gradient magnetic separator (diameter 1.5 meters of high gradient magnetic separators, exciting curent 800 amperes) magnetic separation is obtained TiO
2the concentrate of content 14%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen (according to available 1.5 meters or 2 meters of ore deposit amount, or double-deck) that sieve aperture is 0.4mm, obtain oversize and screenings; High frequency vibrating fine screen screening will be returned again after oversize ball milling;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration to solid contents is 35%;
F, the material after step e secondary concentration is carried out spiral mineral to TiO
2content 32.7%, de-magnetic, then in passing through, magnetic machine (with diameter 0.9 meter, length 2.1 meters, magnetic field intensity>=6500 Gauss) is selected to TiO
2content 46.3%, operation recovery is 45%, and in ilmenite concentrate ,-200 orders are 51%.
Embodiment 3
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron (titaniferous 11.0%, iron content 13%) selected to cross 1.5mm, extracting screen underflow, screenings being concentrated into solid contents is 28%;
B, step a is concentrated after material high gradient magnetic separator (diameter 1.5 meters of high gradient magnetic separators, exciting curent 800 amperes) magnetic separation is obtained TiO
2the concentrate of content 15%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen (according to available 1.5 meters or 2 meters of ore deposit amount, or double-deck) that sieve aperture is 0.4mm, obtain oversize and screenings; High frequency vibrating fine screen screening will be returned again after oversize ball milling;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration to solid contents is 35%;
F, the material after step e secondary concentration is carried out spiral mineral to TiO
2content 33.5%, de-magnetic, then in passing through, magnetic machine (with diameter 0.9 meter, length 2.1 meters, magnetic field intensity>=6500 Gauss) is selected to TiO
2content 47%, operation recovery is 51%, and in ilmenite concentrate ,-200 orders are 55%.
Table 1
| Gained ilmenite concentrate TiO 2Content | The rate of recovery | -200 order content | 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 found out, the ilmenite concentrate content of titanium dioxide that the inventive method filters out is high, and the rate of recovery is high has the nearly twice of method, and-200 object content ratios are now methodical more than 4 times, cost used is suitable with existing method, further illustrates the inventive method and has a good application prospect.
Claims (6)
1. select the method for ilmenite concentrate in vanadium titano-magnetite mine tailing, it is characterized in that: comprise the following steps:
A, the screen cloth that will the vanadium titano-magnetite mine tailing after iron selected to cross 1.5 ~ 2.1mm, extracting screen underflow, is concentrated into solid contents by screenings and is not less than 25%;
B, step a is concentrated after material obtain TiO through high gradient magnetic separator magnetic separation
2content is not less than the concentrate of 14%;
C, step b gained concentrate is taken off magnetic, then sieve through the high frequency vibrating fine screen that sieve aperture is 0.3 ~ 0.6mm, obtain oversize and screenings;
D, the screenings of step c is carried out iron removal by magnetic separation;
E, the material after steps d deironing is carried out secondary concentration be not less than 25% to solid contents;
F, adopt spiral concentrator ore dressing to TiO the material after step e secondary concentration
2content is 30 ~ 35%, de-magnetic, then in passing through, magnetic machine is selected to TiO
2content is not less than 46%.
2. the method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterized in that: in step c, after described oversize continues ball milling, returning sieve aperture is again that the high frequency vibrating fine screen of 0.3 ~ 0.6mm sieves, obtain screenings and oversize, screenings carries out the iron removal by magnetic separation of steps d, and oversize returns again continuation ball milling, is that the high frequency vibrating fine screen of 0.3 ~ 0.6mm sieves with sieve aperture, circulates with this.
3. the method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, is characterized in that: in steps d, and described iron removal by magnetic separation is secondary total Iron in Iron Ore >=40% controlling deironing gained.
4. the method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, is characterized in that: in steps d, and the field intensity of described iron removal by magnetic separation is 2500 ~ 3000 Gausses.
5. the method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, it is characterized in that: in step f, material after step e secondary concentration adopted two-stage ore discharge, the mineral obtaining being more than or equal to 0.1mm are coarse grain, be less than the mineral of 0.1mm and be particulate; Described spiral concentrator adopts three grades of spiral minerals; Coarse grain enters one section of spiral, obtains one section of spiral concentrate, one section of spiral chats, one section of spiral mine tailing; One section of spiral chats and particulate enter two sections of spirals, obtain 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, and obtain three sections of spiral concentrate, three sections of spiral chats, three sections of spiral mine tailings, three sections of spiral concentrate are TiO
2the material of content 30 ~ 35%.
6. the method selecting ilmenite concentrate in vanadium titano-magnetite mine tailing according to claim 1, is characterized in that: in step f, and the field intensity of described middle magnetic machine is 6000 ~ 6500 Gausses.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880008A (en) * | 2016-05-27 | 2016-08-24 | 泗水惠丰农业开发工程有限公司 | Dry-throwing tailing secondary separation technology |
| CN107377196A (en) * | 2017-07-21 | 2017-11-24 | 云南中钛科技有限公司 | A kind of sand ilmenite selects tail processing system and handling process |
| CN109046760A (en) * | 2018-09-26 | 2018-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The recoverying and utilizing method of vanadium titano-magnetite tailing |
| 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 |
| CN112090578A (en) * | 2020-09-09 | 2020-12-18 | 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 |
| CN116273446A (en) * | 2023-02-23 | 2023-06-23 | 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105880008A (en) * | 2016-05-27 | 2016-08-24 | 泗水惠丰农业开发工程有限公司 | Dry-throwing tailing secondary separation technology |
| 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 |
| CN107377196A (en) * | 2017-07-21 | 2017-11-24 | 云南中钛科技有限公司 | A kind of sand ilmenite selects tail processing system and handling process |
| CN109046760A (en) * | 2018-09-26 | 2018-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The recoverying and utilizing method of vanadium titano-magnetite tailing |
| 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 |
| CN112090578A (en) * | 2020-09-09 | 2020-12-18 | 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 |
| 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 |
| CN116273446A (en) * | 2023-02-23 | 2023-06-23 | 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 |
| 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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| CN104689904B (en) | 2017-05-10 |
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