CN105944826A - Method for enriching ilmenite - Google Patents
Method for enriching ilmenite Download PDFInfo
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- CN105944826A CN105944826A CN201610347257.3A CN201610347257A CN105944826A CN 105944826 A CN105944826 A CN 105944826A CN 201610347257 A CN201610347257 A CN 201610347257A CN 105944826 A CN105944826 A CN 105944826A
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- magnetic separation
- ilmenite
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- tooth plate
- enrichment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
The invention discloses a method for enriching ilmenite. The method comprises the steps of carrying out grinding, weak magnet deironing and classification on an ilmenite raw material to obtain materials with two particle sizes of +0.038 mm and -0.038 mm; carrying out medium and strong magnet iron removing on the material with the particle size of +0.038 mm, so as to obtain coarse titanium ore; carrying out magnetic separation on the coarse titanium ore, so as to obtain coarse titanium concentrate 1 and tailings 1; and carrying out magnetic separation on the material with the particle size of -0.038 mm, so as to obtain coarse titanium concentrate 2 and tailings 2. According to the method, different gradient values are obtained through utilizing the difference of mineral magnetism and accurately adopting different magnetic field strength and media, the enrichment of ilmenite is effectively achieved, the level of the obtained coarse titanium concentrate 1 can be improved to 26 to 28%, the recovery rate can reach 80 to 85%, an available method is further provided for enrichment and recycling of ilmenite with the ultrafine-particle size of -0.038 mm, ilmenite tailings with the particle size of -0.038 mm in a conventional technology are effectively enriched and recycled, and resource waste is reduced.
Description
Technical field
The invention belongs to technical field of mineral processing, particularly relate to a kind of method being enriched with ilmenite.
Background technology
Ilmenite is ferrum and titanyl compound mineral, at least accounts for the 85% of World Titanium raw material sources, is the main Ore refining titanium, therefore is considered a kind of important mineral material.China's titanium iron ore deposit reserves are in the first in the world, mainly based on Primary ilmenite, account for the 94.5% of stock number.Along with shortage and the rise in price of natural rutile, supply is stable, cheap ilmenite is becoming a kind of important raw materials for production.But, TiO in ilmenite2Grade low, typically possibly together with other impurity.Therefore, the mineral manufacture field that is enriched in of ilmenite receives attention greatly.
At present, the enrichment method of domestic Primary ilmenite Ore, use vertical ring magnetic separation process to be enriched with after mainly the ilmenite ore after broken-ore grinding being removed ferrum by weak magnetic again, make raw ore TiO2Grade is enriched to 18 ~ 22% from 8 ~ 10%, and the response rate is 60 ~ 70%, the raw material that this crude titaniferous concentrate can be enriched with further as ilmenite.But in the prior art; vertical ring magnetic separation process separation Primary ilmenite is used to obtain crude titaniferous concentrate; first material feeds in the ore deposit case of magnetic separator; magnetic separation medium rotates in the case of ore deposit; ilmenite in ore pulp is adsorbed on magnetic separator medium by the effect in vertical ring magnetic separation magnetic field; the magneticaction of mineral will be increased with distance and weaken by magnetic separation medium; therefore other that certainly will cause that distant mineral are subject to make a concerted effort to adsorb become concentrate on magnetizing mediums more than magnetic force, are difficult to guaranteeing while the response rate reaches 70% further by TiO2Grade improve to more than 22%, be also unfavorable for reducing reagent consumption and the process cost of next section of enrichment operation.
In addition, most techniques all can not reclaim the ilmenite of-0.038mm produced in broken-grinding process, and this partial-titanium iron mine is typically piped directly to Tailings Dam at present and abandons, and this not only results in the waste of ilmenite raw material, also can affect environment.This is to be broadly divided into sieve classification and sloping plate grading owing to being currently used for the equipment of classification, industrial, uses the raw meal particle size of sieve classification to can only achieve+0.074mm, and thinner material is low due to the percent opening of sieve, and classification efficiency is the lowest, difficult for commercial production；Sloping plate grading has application at classification field coarse fraction and fine fraction, its principle mainly relies on the difference of material own wt, difference according to the rate of settling thus form underflow and overflow, fine grained is the least due to the difference by gravity of itself, and affected by granule-morphology, grading efficiency is low.The recovery of current p-0.038mm ilmenite is detected in the outstanding ore dressing of shaking of employing and carries out, but outstanding ore dressing of shaking belongs to film concentration, material is needed to form thin distribution on ore dressing sorting face as far as possible, therefore on the one hand this technique needs to take the biggest place, on the other hand can hang ore dressing of shaking uniformly to be allocated ore pulp will directly affect the ilmenite concentrate index of follow-up acquisition to multiple stage, distribute the concentrate product that irregular very difficult acquisition is qualified, industrial implementation effect it is difficult to ensure that.And outstanding ore dressing of shaking can not sort accurately according to the magnetic contrast of ilmenite and non-ilmenite, but sort according to the difference of specific gravity of material, during sorting, all granularity and patterns by material are affected, non-ilmenite is caused to be selected in concentrate, situation during ilmenite is brought into mine tailing simultaneously occurs, separating effect is undesirable.
Therefore, research and develop a kind of high-recovery that both can guarantee that titanium, can guarantee that again TiO simultaneously2The method tool of high-grade enrichment ilmenite is of great significance.
Summary of the invention
The technical problem to be solved is, overcomes the deficiency and defect mentioned in background above technology, it is provided that a kind of response rate both having ensured titanium, can guarantee that again TiO simultaneously2The method of the enrichment ilmenite of grade.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes, for providing a kind of method being enriched with ilmenite, comprises the following steps:
(1) by ilmenite raw material after ore grinding, weak magnetic are except ferrum, classification, the material of+0.038mm and two kinds of grades of-0.038mm is obtained；
(2)+0.038mm the material obtained after step (1) is carried out middle high intensity magnetic separation and removes ferrum, obtain thick titanium ore；
(3) the thick titanium ore obtained after step (2) is carried out magnetic separation, obtain crude titaniferous concentrate 1 and mine tailing 1；
(4)-0.038mm the material obtained after step (1) is carried out magnetic separation, obtain crude titaniferous concentrate 2 and mine tailing 2.
The method of above-mentioned enrichment ilmenite, it is preferred that in described step (1), weak magnetic is 1000 ~ 2000 Gausses except the magnetic field intensity of ferrum.
Preferably, in described step (1), classification process uses hydroclone classification；The feed force of described hydrocyclone is 0.10 ~ 0.30MPa；A diameter of 16 ~ 20mm, a diameter of 30 ~ 50mm of overflow lip of the sand settling mouth that described hydrocyclone uses, the angle of cone angle is 10 ~ 15 °.
Preferably, in described step (2), the magnetic field intensity of middle high intensity magnetic separation magnetic is 3000 ~ 5000 Gausses.
Preferably, in described step (3), the number of times of magnetic separation is twice, and twice magnetic separation is flat ring magnetic separation, and the magnetic field intensity of described twice flat ring magnetic separation respectively is 7000 ~ 10000 gaussian sum 6000 ~ 9000 Gausses.
Preferably, in described step (3), flat ring magnetic separation uses the magnetic separator with tooth plate cartridge, and described tooth plate cartridge has zigzag medium tooth plate, and the gap of adjacent two zigzag medium tooth plates is 1 ~ 2mm, and the space width of independent tooth plate is 1 ~ 2mm.
Preferably, in described step (3), at described tooth plate cartridge to adding clean water device on direction, ore deposit, during each magnetic separation, all flush out mine tailing with the hydraulic pressure of 0.15 ~ 0.30MPa；The concentrate every time obtained after magnetic separation all rinses with the hydraulic pressure of 0.1 ~ 0.3MPa.
Preferably, in described step (4), in described step (4), the number of times of magnetic separation is three times, and three magnetic separation are flat ring magnetic separation, and the magnetic field intensity of described three magnetic separation respectively is 8000 ~ 11000 Gausses, 7000 ~ 9000 gaussian sum 6000 ~ 8000 Gausses.
Preferably, in described step (4), flat ring magnetic separation uses the magnetic separator with tooth plate cartridge, and described tooth plate cartridge has zigzag medium tooth plate, and the gap of adjacent two zigzag medium tooth plates is 0.8 ~ 1mm, and the space width of independent tooth plate is 1 ~ 2mm.
Preferably, in described step (4), at described tooth plate cartridge to adding clean water device on direction, ore deposit, during each magnetic separation, all flush out mine tailing with the hydraulic pressure of 0.15 ~ 0.20MPa；The concentrate every time obtained after magnetic separation all rinses with the hydraulic pressure of 0.1 ~ 0.3MPa.
Compared with prior art, the invention have the benefit that
1. the method that the present invention is enriched with ilmenite, utilize the difference of magnetic mineral, different magnetic field intensity and medium is used to obtain different Grad accurately, effectively realize the enrichment of ilmenite, both crude titaniferous concentrate 1 grade that can make acquisition brings up to 26 ~ 28%, and the response rate can reach 80 ~ 85%, and the most also enriching and recovering for-0.038mm ultra-fine grade ilmenite provides available method, the ilmenite mine tailing making-0.038mm in existing technique obtains effective enriching and recovering, decreases the wasting of resources.
2. the present invention uses hydrocyclone to carry out classification to except the raw ore after ferrum, grading effect is more excellent, because the ore pulp of hydrocyclone feeds in cyclone with certain initial velocity along the tangential direction of cyclone, obtain rotary motion, produce bigger centrifugal force, under the influence of centrifugal force, coarse fraction is then moved downwardly to sand settling mouth with helix, fine fraction is then discharged by overfall in internal coiling track, and the material that being therefore especially suitable for the grading higher carse, medium and small granule of requirement has carries out classification.
3. the present invention uses flat ring magnetic separation directly to be fed by material in magnetic separation cartridge, the magneticaction that material is subject to is highly uniform, can fully be sorted by the difference of magnetic mineral, for relatively standing ring magnetic separation simultaneously, flat ring magnetic separation to adding clean water device on direction, ore deposit at cartridge, is carried out work after entering magnetic separation region to ore deposit simultaneously, first flushes out a part of mine tailing, reduce non-magnetic material being mingled with in concentrate, can significantly improve concentrate grade.
4. the enrichment operation of the present invention is simple, need not add chemical reagent, not only contributes to reduce production cost, and the protection of beneficially environment.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the process flow diagram of the enrichment ilmenite of embodiment 1.
Fig. 2 is the process flow diagram of the enrichment ilmenite of comparative example 1.
Detailed description of the invention
For the ease of understanding the present invention, the present invention is done more comprehensively below in conjunction with Figure of description and preferred embodiment, describes meticulously, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, with those skilled in the art, all technical term used hereinafter is generally understood that implication is identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limit the scope of the invention.
Unless otherwise specified, the various raw materials used in the present invention, reagent, instrument and equipment etc. all can be commercially available by market or can be prepared by existing method.
Embodiment
1
:
A kind of method being enriched with ilmenite, as it is shown in figure 1, comprise the steps:
(1) by Panxi Diqu vanadium titano-magnetite (now raw material TiO after ore grinding, weak magnetic are except ferrum2Grade is 9.85%), use hydrocyclone that it is carried out classification, obtain the material of+0.038mm and two kinds of grades of-0.038mm；Weak magnetic is 1200 Gausses except the magnetic field intensity of ferrum；The feed force of hydrocyclone is 0.20MPa, and a diameter of 18mm, a diameter of 40mm of overflow lip of the sand settling mouth that hydrocyclone uses, the angle of cone angle is 13 °；
(2)+0.038mm the material obtained after step (1) is carried out middle high intensity magnetic separation and removes ferrum, obtain thick titanium ore；The magnetic field intensity of middle high intensity magnetic separation magnetic is 3500 Gausses；
(3) the thick titanium ore obtained after step (2) is added in the dentation cartridge of flat ring magnetic separator (dentation cartridge have gap be 2mm, space width be the zigzag medium tooth plate of 2mm), twice flat ring magnetic separation is carried out successively under the magnetic field intensity of 8000 gaussian sum 7000 Gausses, simultaneously at tooth plate cartridge to adding clean water device on direction, ore deposit, the hydraulic pressure of magnetic separation limit, limit 0.20MPa flushes out mine tailing, the water that concentrate hydraulic pressure is 0.3MPa every time obtained after magnetic separation rinses, and obtains crude titaniferous concentrate 1 and mine tailing 1；
(4)-0.038mm the material obtained after step (1) is added in the dentation cartridge of flat ring magnetic separator (dentation cartridge have gap be 0.8mm, space width be the zigzag medium tooth plate of 1mm), successively 10000 Gausses, 8000 gaussian sum 7000 Gausses magnetic field intensity under carry out three flat ring magnetic separation, simultaneously at tooth plate cartridge to adding clean water device on direction, ore deposit, the hydraulic pressure of magnetic separation limit, limit 0.15MPa flushes out mine tailing, the water that concentrate hydraulic pressure is 0.3MPa every time obtained after magnetic separation rinses, and obtains crude titaniferous concentrate 2 and mine tailing 2.
The response rate of the final crude titaniferous concentrate 1 obtained is 85.68%, TiO2Grade is 27.65%；The TiO of the final crude titaniferous concentrate 2 obtained2Grade is 20.36%, and the response rate is 65.45%；Whole process crude titaniferous concentrate is 83.25% to the response rate of raw material, TiO2Grade is 26.78%.As can be seen here, the present invention is enriched with the method for ilmenite, both crude titaniferous concentrate 1 response rate that can make acquisition reaches more than 85%, grade brings up to more than 27%, the most also enriching and recovering for-0.038mm ultra-fine grade ilmenite provides available method, the ilmenite mine tailing making-0.038mm in existing technique obtains effective enriching and recovering, decreases the wasting of resources.
Embodiment
2
:
A kind of method being enriched with ilmenite, comprises the steps:
(1) by Panxi Diqu vanadium titano-magnetite (now raw material TiO after ore grinding, weak magnetic are except ferrum2Grade is 9.62%), use hydrocyclone that it is carried out classification, obtain the material of+0.038mm and two kinds of grades of-0.038mm；Weak magnetic is 1000 Gausses except the magnetic field intensity of ferrum；The feed force of hydrocyclone is 0.10MPa, and a diameter of 16mm, a diameter of 30mm of overflow lip of the sand settling mouth that hydrocyclone uses, the angle of cone angle is 10 °；
(2)+0.038mm the material obtained after step (1) is carried out middle high intensity magnetic separation and removes ferrum, obtain thick titanium ore；The magnetic field intensity of middle high intensity magnetic separation magnetic is 4000 Gausses；
(3) the thick titanium ore obtained after step (2) is added in the dentation cartridge of flat ring magnetic separator (dentation cartridge have gap be 1.5mm, space width be the zigzag medium tooth plate of 1.5mm), twice flat ring magnetic separation is carried out successively under the magnetic field intensity of 7000 gaussian sum 6000 Gausses, simultaneously at tooth plate cartridge to adding clean water device on direction, ore deposit, the hydraulic pressure of magnetic separation limit, limit 0.15MPa flushes out mine tailing, the water that concentrate hydraulic pressure is 0.25MPa every time obtained after magnetic separation rinses, and obtains crude titaniferous concentrate 1 and mine tailing 1；
(4)-0.038mm the material obtained after step (1) is added in the dentation cartridge of flat ring magnetic separator (dentation cartridge have gap be 1mm, space width be the zigzag medium tooth plate of 1.2mm), successively 9000 Gausses, 8000 gaussian sum 7000 Gausses magnetic field intensity under carry out three flat ring magnetic separation, simultaneously at tooth plate cartridge to adding clean water device on direction, ore deposit, the hydraulic pressure of magnetic separation limit, limit 0.15MPa flushes out mine tailing, the water that concentrate hydraulic pressure is 0.25MPa every time obtained after magnetic separation rinses, and obtains crude titaniferous concentrate 2 and mine tailing 2.
The response rate of the final crude titaniferous concentrate 1 obtained is 84.76%, TiO2Grade is 28.33%；The TiO of the final crude titaniferous concentrate 2 obtained2Grade is 24.68%, and the response rate is 62.41%；Whole process crude titaniferous concentrate is 82.75% to the response rate of raw material, TiO2Grade is 27.68%.As can be seen here, the present invention is enriched with the method for ilmenite, both crude titaniferous concentrate 1 response rate that can make acquisition reaches about 85%, grade brings up to more than 28%, the most also enriching and recovering for-0.038mm ultra-fine grade ilmenite provides available method, the ilmenite mine tailing making-0.038mm in existing technique obtains effective enriching and recovering, decreases the wasting of resources.
Comparative example
1
:
A kind of method being enriched with ilmenite, as in figure 2 it is shown, comprise the steps:
(1) by Panxi Diqu vanadium titano-magnetite (now raw material TiO after ore grinding, weak magnetic (magnetic field intensity is 2000 Gausses) are except ferrum2Grade is 9.85%), it is carried out sloping plate grading, obtains the material of three kinds of grades of+0.074mm ,-0.074+0.038mm and-0.038mm；
(2)+0.074mm the material obtained after step (1) carrying out vertical ring magnetic separation 1(magnetic field intensity successively is 7000 Gausses), low intensity magnetic separation 1(magnetic field intensity be 1000 Gausses), vertical ring magnetic separation 2(magnetic field intensity be 6000 Gausses), vertical ring magnetic separation 3(magnetic field intensity be 10000 Gausses), obtain crude titaniferous concentrate 1, secondary ferrum 1 and mine tailing 1；
(3)-0.074+0.038mm the material obtained after step (1) being carried out low intensity magnetic separation 2(magnetic field intensity successively is 1000 Gausses), vertical ring magnetic separation 4(magnetic field intensity be 8000 Gausses), vertical ring magnetic separation 5(magnetic field intensity be 10000 Gausses), low intensity magnetic separation 3(magnetic field intensity be 1000 Gausses), vertical ring magnetic separation 6(magnetic field intensity be 9000 Gausses) and vertical ring magnetic separation 7(10000 magnetic field intensity be Gauss), obtain crude titaniferous concentrate 2, secondary ferrum 2, secondary ferrum 3 and mine tailing 2；
(4)-0.038mm the material that step (1) obtains is entered Tailings Dam by direct overflow at present.
The response rate of the final crude titaniferous concentrate 1 obtained is 60%, TiO2Grade is 22.47%；The response rate of the final crude titaniferous concentrate 2 obtained is 67.87%, TiO2Grade is 21.53%；Whole process crude titaniferous concentrate is 55.18% to the response rate of raw material, TiO2Grade is 22.15%.As can be seen here, the response rate of the crude titaniferous concentrate 1 of the acquisition of the present invention in comparison and TiO2Grade is the highest, and whole process crude titaniferous concentrate is to the response rate of raw material and TiO2Grade also increases.
Claims (10)
1. the method being enriched with ilmenite, comprises the following steps:
(1) by ilmenite raw material after ore grinding, weak magnetic are except ferrum, classification, the material of+0.038mm and two kinds of grades of-0.038mm is obtained；
(2)+0.038mm the material obtained after step (1) is carried out middle high intensity magnetic separation and removes ferrum, obtain thick titanium ore；
(3) the thick titanium ore obtained after step (2) is carried out magnetic separation, obtain crude titaniferous concentrate 1 and mine tailing 1；
(4)-0.038mm the material obtained after step (1) is carried out magnetic separation, obtain crude titaniferous concentrate 2 and mine tailing 2.
The method of enrichment ilmenite the most according to claim 1, it is characterised in that in described step (1), weak magnetic is 1000 ~ 2000 Gausses except the magnetic field intensity of ferrum.
The method of enrichment ilmenite the most according to claim 1 and 2, it is characterised in that in described step (1), classification process uses hydroclone classification；The feed force of described hydrocyclone is 0.10 ~ 0.30MPa；A diameter of 16 ~ 20mm, a diameter of 30 ~ 50mm of overflow lip of the sand settling mouth that described hydrocyclone uses, the angle of cone angle is 10 ~ 15 °.
The method of enrichment ilmenite the most according to claim 1, it is characterised in that in described step (2), the magnetic field intensity of middle high intensity magnetic separation is 3000 ~ 5000 Gausses.
The method of enrichment ilmenite the most according to claim 1, it is characterized in that, in described step (3), the number of times of magnetic separation is twice, twice magnetic separation is flat ring magnetic separation, and the magnetic field intensity of described twice flat ring magnetic separation respectively is 7000 ~ 10000 gaussian sum 6000 ~ 9000 Gausses.
The method of enrichment ilmenite the most according to claim 5, it is characterized in that, in described step (3), flat ring magnetic separation uses the magnetic separator with tooth plate cartridge, described tooth plate cartridge has zigzag medium tooth plate, the gap of adjacent two zigzag medium tooth plates is 1 ~ 2mm, and the space width of independent tooth plate is 1 ~ 2mm.
The method of enrichment ilmenite the most according to claim 6, it is characterised in that in described step (3), at described tooth plate cartridge to adding clean water device on direction, ore deposit, all flushes out mine tailing with the hydraulic pressure of 0.15 ~ 0.30MPa during each magnetic separation；The concentrate every time obtained after magnetic separation all rinses with the hydraulic pressure of 0.10 ~ 0.30MPa.
The method of enrichment ilmenite the most according to claim 1, it is characterized in that, in described step (4), the number of times of magnetic separation is three times, three magnetic separation are flat ring magnetic separation, and the magnetic field intensity of described three magnetic separation respectively is 8000 ~ 11000 Gausses, 7000 ~ 9000 gaussian sum 6000 ~ 8000 Gausses.
The method of enrichment ilmenite the most according to claim 8, it is characterized in that, in described step (4), flat ring magnetic separation uses the magnetic separator with tooth plate cartridge, described tooth plate cartridge has zigzag medium tooth plate, the gap of adjacent two zigzag medium tooth plates is 0.8 ~ 1mm, and the space width of independent tooth plate is 1 ~ 2mm.
The method of enrichment ilmenite the most according to claim 9, it is characterised in that in described step (4), at described tooth plate cartridge to adding clean water device on direction, ore deposit, all flushes out mine tailing with the hydraulic pressure of 0.15 ~ 0.20MPa during each magnetic separation；The concentrate every time obtained after magnetic separation all rinses with the hydraulic pressure of 0.10 ~ 0.30MPa.
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| CN109433407A (en) * | 2018-09-14 | 2019-03-08 | 昆明理工大学 | The recovery method of ultra tiny grade ilmenite in a kind of high intensity magnetic separation tailing |
| CN113145295A (en) * | 2021-04-06 | 2021-07-23 | 昆明理工大学 | Magnetic separation quality improvement method for high-iron low-grade bauxite |
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| CN109433407A (en) * | 2018-09-14 | 2019-03-08 | 昆明理工大学 | The recovery method of ultra tiny grade ilmenite in a kind of high intensity magnetic separation tailing |
| CN113145295A (en) * | 2021-04-06 | 2021-07-23 | 昆明理工大学 | Magnetic separation quality improvement method for high-iron low-grade bauxite |
| CN113145295B (en) * | 2021-04-06 | 2023-09-19 | 昆明理工大学 | Magnetic separation upgrading method for high-iron low-grade bauxite |
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