CN103495500A - Low-energy-consumption method for separating ilmenites from tailings in iron choosing plant - Google Patents
Low-energy-consumption method for separating ilmenites from tailings in iron choosing plant Download PDFInfo
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- CN103495500A CN103495500A CN201310475357.0A CN201310475357A CN103495500A CN 103495500 A CN103495500 A CN 103495500A CN 201310475357 A CN201310475357 A CN 201310475357A CN 103495500 A CN103495500 A CN 103495500A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 15
- 238000005265 energy consumption Methods 0.000 title claims abstract description 12
- 239000012141 concentrate Substances 0.000 claims abstract description 55
- 239000006148 magnetic separator Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 31
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 29
- 239000011707 mineral Substances 0.000 claims abstract description 29
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000007885 magnetic separation Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000000696 magnetic material Substances 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000000178 monomer Substances 0.000 claims abstract description 5
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 29
- 238000005188 flotation Methods 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000003002 pH adjusting agent Substances 0.000 claims description 6
- 238000010494 dissociation reaction Methods 0.000 claims description 4
- 230000005593 dissociations Effects 0.000 claims description 4
- 230000003534 oscillatory effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 11
- 238000010408 sweeping Methods 0.000 abstract 3
- 238000007599 discharging Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
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- 230000004907 flux Effects 0.000 description 1
- 239000006246 high-intensity magnetic separator Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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Abstract
The invention discloses a low-energy-consumption method for separating ilmenites from tailings in an iron choosing plant. The method comprises the following steps: firstly, by taking the tailings in the iron choosing plant as raw materials, separating the tailings by using a permanent magnet drum-type mediate-intensity magnetic separator; discharging non-magnetic materials directly taken as magnetic separation tailings; next, grinding mediate magnetic separation concentrates taken as magnetic materials under the conditions that the monomer separation of the ilmenites is effectively realized while the grinding concentrates, the fineness of which is controlled as -75mu m, account for 75% to 95%; performing low-intensity magnetic separation on the mediate magnetic separation concentrates by using a low-intensity magnetic separator so as to separate iron concentrates and lead the rest of mineral materials to enter the next step; performing rough separation on the rest of mineral materials and then performing fine separation on the concentrates for multiple times after the rough separation so as to obtain ilmenite concentrates; performing sweeping separation on the tailings after the rough separation; combining the useful mineral materials for multiple times after the sweeping separation; returning the tailings after the fine separation into a rough separation process; and finally discharging the tailings which are subjected to the sweeping separation are taken as the ilmenites. The method is simple in process, reasonable in magnetic path design, uniform in magnetic field distribution, high in metal recovery rate and good in separation quality.
Description
Technical field
The present invention relates to a kind of method for separating of ilmenite, relate in particular to a kind of from select the ironworks mine tailing method of separating ilmenite.
Background technology
The ilmenite resource of China is titanomagnetite, ilmenite symbiosis mostly, and traditional vanadium titano-magnetite technique mostly is first selects iron, and titanomagnetite enters iron ore concentrate, then selects titanium, and ilmenite enters ilmenite concentrate.The Panxi Diqu vanadium titano-magnetite, through tackling key problem for many years, has had comparatively ripe comprehensive reutilization ability, but also have in the mine tailing of Xuan ironworks, some areas, contains 9%～12% ilmenite, directly is discarded in Tailings Dam, has caused a large amount of wastes of ilmenite resource.
Panxi Diqu is for the recovery of Fine Fraction Ilmenite, the strong magnetic machines of high gradient that adopt by one section or two sections fine-graded ilmenites recovery of strengthening more, improve the ilmenite grade of flotation to ore deposit simultaneously, making flotation is 18%～20% to the ilmenite grade in ore deposit, realizes that final ilmenite concentrate grade approaches or is greater than 47%.
The commercial application of the strong magnetic machine of high gradient has produced great and far-reaching influence for improving China's weak magnetic mineral comprehensive recovery, improve the background lectromagnetism field of the strong magnetic machine of high gradient and optimize the key areas that its magnetic field gradient profile is the developmental research of the strong magnetic machine of high gradient, but it utilizes electric current to produce high-intensity magnetic field, have certain energy consumption, and its complex structure has caused its equipment cost higher.High speed development along with the permanent magnetism rare earth material, current high performance permanent magnetism rare earth material also can produce the medium-high magnetic field that background lectromagnetism field is 6000～13000 Gausses, and this commercial application for strong machine in the development of new permanent-magnet chamber type (or claiming magnetic separator in permanent-magnet chamber type) provides background lectromagnetism field basis preferably.In existing permanent-magnet chamber type, it is simple in structure for magnetic separator, utilizes permanent magnet to produce background lectromagnetism field, and processed in units amount energy consumption is lower, and its equipment cost and operating cost are far below the strong magnetic machine of high gradient, but it is distributed with a suitable interval to the particle diameter that is selected in material.Magnetic separator in the tradition permanent-magnet chamber type, because give the relative simplification of ore deposit mode, can not effectively disperse in selected material sorting groove, has caused its rate of recovery relatively low; Again because magnetic linkage or higher background lectromagnetism field cause magnetic to be mingled with, make the quality of magnetic concentrate product on the low side simultaneously, make the commercial application of magnetic separator in permanent-magnet chamber type be subject to certain restriction.
In addition, for selecting the ironworks mine tailing, the mineral aggregate of its-74 μ m only accounts for 14% left and right, grade distributes relatively thick, in mine tailing, grade of titanium dioxide is about 11%,, for selecting the ironworks mine tailing that a kind of low energy consumption and method for separating efficiently are provided, be how that those skilled in the art endeavour the technical problem solved always.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of method of low energy consumption separating ilmenite from select the ironworks mine tailing that provides that processing step is simple, magnetic separation is effective, metal recovery rate is high, sorting quality is good.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes be a kind of from select the ironworks mine tailing method of low energy consumption separating ilmenite, comprise the following steps:
(1) permanent-magnet chamber type high intensity magnetic separation: take and select the ironworks mine tailing as raw material, first adopt magnetic separator in permanent-magnet chamber type to carry out sorting to this raw material, non-magnetic material is directly as magnetic tailing discharge, as the middle magnetic concentrate of magnetic material, enters next step;
(2) ore grinding: the middle magnetic concentrate obtained after step (1) is carried out to ore grinding, make wherein ilmenite effectively realize monomer dissociation, mog is controlled and is accounted for 75%～95%(preferably 75%～80% for-75 μ m);
(3) low intensity magnetic separation: utilize weak magnetic separator to carry out low intensity magnetic separation to the middle magnetic concentrate obtained after step (2), sub-elect iron ore concentrate wherein, the residue mineral aggregate enters next step;
(4) flotation operation: the residue mineral aggregate after step (3) is first roughly selected, and the concentrate after roughly selecting carries out repeatedly selected acquisition ilmenite concentrate; Mine tailing after roughly selecting is scanned, and the useful mineral aggregate after scanning remerges repeatedly mine tailing material after selected and is back to and roughly selects step, and the mine tailing material after scanning is discharged as final titanium mine tailing.
In above-mentioned method, preferred, the described repeatedly selected selected operation that comprises at least four times; The useful mineral aggregate of primary cleaning operation enters recleaning, and the mine tailing material of primary cleaning is back to primary dcreening operation; The useful mineral aggregate of recleaning operation enters triple cleaning, and the mine tailing material of recleaning is back to the primary cleaning operation; By that analogy.
In above-mentioned method, preferred, in described rougher process, select sulfuric acid as the pH adjusting agent, select waterglass as inhibitor, pH adjusts between 5.0～5.6; Repeatedly in refining process, each sulfuric acid that uses is as the pH adjusting agent, and pH adjusts between 4.5～5.5.
In above-mentioned method, preferred, in described permanent-magnet chamber type, the background lectromagnetism field of magnetic separator is 6000～12000 Gausses.
In above-mentioned method, preferably, in described permanent-magnet chamber type, magnetic separator comprises feed hopper, permanent magnetic system, cylinder and sorting groove, described permanent magnetic system is installed in cylinder, and sorting groove is located at the cylinder below, and the middle part of described sorting groove bottom surface is provided with the mine tailing discharge gate, sorting groove one side is provided with the concentrate bucket, sorting groove opposite side top is provided with feed hopper, and the sorting groove bottom surface of close feed hopper is laid with many and breaks up the water water pipe, breaks up the surface of the mouth of pipe of water water pipe towards the cylinder that is positioned at top; Described concentrate bucket top is provided with the flushing water water pipe, and the mouth of pipe of flushing water water pipe is towards the surface of the cylinder that is positioned at the one side.
In above-mentioned method, preferred, the sorting runner of formation one semicircular arc between described sorting groove bottom surface and cylinder, in described sorting runner, the flow direction of material and turning to of described cylinder are consistent.Preferred, described sorting runner take the mine tailing discharge gate as boundary line delimitation for roughly selecting district and selected district, and it is higher to roughly select the selected district of magnetic pole density ratio in district.
In above-mentioned method, preferred, described feed hopper is the oscillatory type feed hopper, and described oscillatory type feed hopper comprises feeder trough, vibrating motor and suspension screw rod, and described feeder trough is installed location by hanging screw rod, and vibrating motor is installed in feeder trough one side.
In above-mentioned method, preferred, the cloth charge level of described feeder trough tilts, and itself and horizontal plane form the inclination angle of 10 °～15 °, and feed is more smooth and easy like this.Four suspension screw rods are used respectively the belt connection frame, and the inclination angle of cloth charge level can also be regulated by four suspension screw rods regulating the suspended vibration bucket according to actual conditions.Described vibrating motor has the eccentric rotor structure be rotated counterclockwise, and so both can produce the component of left and right directions, and material is fully disperseed, and can produce again the vibration component of fore-and-aft direction, makes material produce power forward, and it will be more smooth and easy making feed.
In above-mentioned method, preferably, between described concentrate bucket and sorting groove, by a mine-separating board, separate, described mine-separating board extends upwardly to the surface near cylinder from the sorting groove bottom surface, and the mouth of pipe of described flushing water water pipe is aimed at the intersection zone of plane, mine-separating board place and cylinder surface.
In above-mentioned method, preferred, described sorting runner take the mine tailing discharge gate as boundary line delimitation for roughly selecting district and selected district, and it is higher to roughly select the selected district of magnetic pole density ratio in district; Described many are broken up the water water pipe for being arranged parallel to each other, and many are broken up the water water pipe and are distributed in roughly selecting in district between mine tailing discharge gate and feed hopper.
The above-mentioned preferred technical scheme of the present invention is mainly the improvement to magnetic separator in traditional permanent-magnet chamber type, it relates generally to the effective dispersion to the optimization process of ore deposit end and strengthening ore pulp, show as especially ore pulp dispersing water flow device is set in the sorting groove middle and lower part, preferred scheme be in permanent-magnet chamber type magnetic separator to the ore deposit end, vibratory feed unit is set, both are organically combined.
Compared with prior art, the invention has the advantages that:
(1) in the present invention, the sorting groove bottom by magnetic separator in permanent-magnet chamber type increases press water dispersal device (breaking up the water water pipe) newly, base pressure water can disperse magnetic coagulation effectively, thereby reduce non-magnetic material, because of magnetic coagulation or flux linkage effects, causes being mingled with; Base pressure water can also make the selected material that enters sorting groove keep dispersity, thereby be conducive to magnetic material, by background magnetic field, is adsorbed, and from the concentrate end, discharges, and increases the productive rate of magnetic concentrate; Therefore, by the newly-increased press water dispersal device in sorting cell body bottom, both having made the quality of concentrate improve, contribute to again the increase of concentrate yield.
(2) in the permanent-magnet chamber type used in the present invention, magnetic separator can be divided into selected district and roughly select district, be all to adopt the high-performance Ne-Fe-B material, but it is higher to roughly select district's magnetic pole density, has improved magnetic field gradient, thereby has made ore particle more easily stick on coplanar; Roughly select on the sorting groove inwall in district and also set up the above-mentioned water water pipe that breaks up, it,, mainly for preventing the ore particle deposition, it fully being contacted with a cylinder face, plays the effect that the ore particle minimizing is carried secretly of breaking up.
(3) in preferred scheme also by magnetic separator in permanent-magnet chamber type of the present invention to the newly-increased vibratory feed unit of ore deposit end, replace traditional box feed-type, vibratory feed unit both can guarantee the uniformity of selected material to ore deposit, can guarantee that again selected material is fully disperseing to the ore deposit end, prevent heavy mineral deposition, and then while making magnetic material in selected material enter sorting groove, can effectively be adsorbed by background lectromagnetism field, and discharge from the concentrate end, improved to ore deposit efficiency with to the ore deposit uniformity.
Generally speaking, technological process of the present invention is simple, reasonable, the permanent magnetic circuit advanced design of magnetic separator in permanent-magnet chamber type, and Distribution of Magnetic Field is even; Be directed to the technological requirement of the wet type pre-selecting throwing tail of mine tailing, sorting mode of the present invention had both guaranteed the discharge of qualified tailings, had also improved as much as possible metal recovery rate, had further promoted the quality of ore dressing.
The accompanying drawing explanation
Fig. 1 is the fundamental diagram of magnetic separator in permanent-magnet chamber type in the embodiment of the present invention.
Fig. 2 is the sorting groove top view of magnetic separator in permanent-magnet chamber type in the embodiment of the present invention.
Fig. 3 is the top view of the vibratory feed unit of magnetic separator (having saved feeder trough) in permanent-magnet chamber type in the embodiment of the present invention.
Fig. 4 is the main cutaway view of the vibratory feed unit of magnetic separator in permanent-magnet chamber type in the embodiment of the present invention.
The process chart of the method for low energy consumption separating ilmenite from select the ironworks mine tailing that Fig. 5 is the embodiment of the present invention.
Marginal data:
1, flushing water water pipe; 2, concentrate bucket; 3, mine tailing discharge gate; 4, vibratory feed unit; 41, feeder trough; 42, vibrating motor; 43, hang screw rod; 5, permanent magnetic system; 6, cylinder; 7, sorting groove; 8, sorting runner; 9, mine-separating board; 10, break up the water water pipe; 11, downflow weir.
The specific embodiment
Below in conjunction with Figure of description, with concrete preferred embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
Embodiment:
A kind of as shown in Figure 5 of the present invention from select the ironworks mine tailing method of low energy consumption separating ilmenite, it selects the ironworks mine tailing mainly for somewhere, comprises the following steps:
(1) permanent-magnet chamber type high intensity magnetic separation:
Take and select the ironworks mine tailing as raw material, first adopt as shown in FIG. 1 to 3 magnetic separator in permanent-magnet chamber type to carry out sorting (magnetic field intensity is 8000GS) to this raw material, non-magnetic material is directly as the magnetic tailing discharge, as the middle magnetic concentrate of magnetic material, enters next step; Process and greatly reduced " as secondary resource select the ironworks mine tailing " by magnetic separator tailings discarding by preconcentration in permanent-magnet chamber type of the present invention and need the inventory of ore grinding again, production cost and energy consumption have been reduced, have again, utilize magnetic separator in permanent-magnet chamber type of the present invention to replace the High gradient high intensity magnetic separator sorting, also reduced very significantly purchase cost and the operating cost of equipment.
(2) ore grinding:
Through our experimental analysis, because the grade of selecting the ironworks mine tailing distributes thicker, contain partial-titanium magnetic iron ore and ilmenite and there is no monomer dissociation, therefore need carry out ore grinding to the middle magnetic concentrate obtained after step (1), make wherein ilmenite effectively realize monomer dissociation, mog is controlled and is accounted for 75% for-75 μ m;
(3) low intensity magnetic separation:
Through our experimental analysis, also contain some weak magnetic mineral in the middle magnetic concentrate product of step (2), this part mineral will affect the titanium grade of final concentrate, the extraction of this part iron mineral simultaneously also can improve the benefit of enterprise if obtain qualified iron ore concentrate, therefore before entering flotation, we utilize weak magnetic separator to carry out low intensity magnetic separation to the middle magnetic concentrate obtained after step (2), sub-elect the wherein lower iron ore concentrate of productive rate, the residue mineral aggregate enters next step; This had both improved the rate of recovery of iron, was conducive to again improve titaniferous material head grade in follow-up flotation operation.In the present invention, the result of the test of low intensity magnetic separation is as shown in table 1 below.
Table 1: low intensity magnetic separation result of the test
As shown in Table 1, middle magnetic concentrate is through one section low intensity magnetic separation, obtained productive rate and be 11.54%, the iron ore concentrate of iron grade 42.13%, the rate of recovery 26.82%.
(4) flotation operation: at the flotation operation of the present embodiment, the particulate titanium flotation process that we adopt " one thick+tetra-essences+sweep ", residue mineral aggregate to titaniferous 14.5% left and right (the present embodiment is 14.26%) after step (3) is first roughly selected, and the concentrate after roughly selecting carries out repeatedly selected acquisition ilmenite concentrate; Mine tailing after roughly selecting is scanned, and the useful mineral aggregate after scanning remerges repeatedly mine tailing material after selected and is back to and roughly selects step, and the mine tailing material after scanning is discharged as final titanium mine tailing.Consider every influence factors such as the composition of flotation water and pH value, in the present embodiment, at first adopt sulfuric acid to adjust between 5.0～5.6 as pH adjusting agent, flotation pH, adopt waterglass as inhibitor, employing multicomponent chelate collecting agent etc. carries out the titanium flotation, in refining process, each sulfuric acid that uses is as the pH adjusting agent, adjusts between pH to 4.5～5.5 (flotation process specifically can referring to flotation operation part in Fig. 4).The final flotation operation result of the present embodiment is as shown in table 2 below.
Table 2: the closed circuit flow test result of flotation
The present embodiment finally can obtain by flotation the more satisfactory technical-economic index that the ilmenite concentrate grade is about 45.05%, operation recovery is 61.12%, be 41% to raw ore (the selecting the ironworks mine tailing) rate of recovery.
Magnetic separator in permanent-magnet chamber type in the present invention shown in Fig. 1～Fig. 4, involving vibrations feed hopper 4, permanent magnetic system 5, cylinder 6 and sorting groove 7, permanent magnetic system 5 is installed in cylinder 6, sorting groove 7 is located at cylinder 6 belows, the middle part of sorting groove 7 bottom surfaces is provided with mine tailing discharge gate 3, sorting groove 7 one sides are provided with concentrate bucket 2, sorting groove 7 opposite side tops are provided with vibratory feed unit 4, sorting groove 7 bottom surfaces of close vibratory feed unit 4 are laid with many and break up water water pipe 10, break up the surface of the mouth of pipe of water water pipe 10 towards the cylinder 6 that is positioned at top; Concentrate bucket 2 tops are provided with flushing water water pipe 1, and the mouth of pipe of flushing water water pipe 1 is towards the surface of the cylinder 6 that is positioned at the one side.Break up water water pipe 10 for outside water inlet, its Main Function is to break up mineral, prevents conglomeration, thereby reduce, carries secretly; Can prevent the heavy mineral premature precipitation, by the percussion of current, make most mineral in suspended state, it is fully contacted with the field regions of cylinder 6, to improve the rate of recovery of concentrate simultaneously.1, flushing water water pipe contributes to the mineral aggregate after magnetic separation is further sieved, and guarantees taste and the quality of selected mineral aggregate.Between concentrate bucket 2 and sorting groove 7, by a mine-separating board 9, separate, mine-separating board 9 extends upwardly to the surface near cylinder 6 from sorting groove 7 bottom surfaces, and the mouth of pipe of flushing water water pipe 1 is aimed at the intersection zone on mine-separating board 9 planes, place and cylinder 6 surfaces.Many are broken up water water pipe 10 for being arranged parallel to each other, and many are broken up water water pipe 10 and are distributed in sorting groove 7 bottoms between mine tailing discharge gate 3 and vibratory feed unit 4.Downflow weir 11 also is set on sorting groove 7.
Wherein, form the sorting runner 8 of a semicircular arc between sorting groove 7 bottom surfaces and cylinder 6, in sorting runner 8, the flow direction of material and turning to of cylinder 6 are consistent.As shown in fig. 1, turning to of the flow direction of material and cylinder 6 is clockwise.The sorting runner take mine tailing discharge gate 3 as boundary line delimitation for roughly selecting district and selected district, and it is higher to roughly select the selected district of magnetic pole density ratio in district.
In the present embodiment, vibratory feed unit 4 comprises that feeder trough 41, vibrating motor 42(have the eccentric rotor structure be rotated counterclockwise) and hang screw rod 43, feeder trough 41 is installed location by hanging screw rod 43, and vibrating motor 42 is installed in feeder trough 41 1 sides.The cloth charge level of feeder trough 41 tilts, and itself and horizontal plane form the inclination angle of 10 °～15 °, and the angle of inclination of cloth charge level can be regulated by hanging screw rod 43.
In the permanent-magnet chamber type of above-mentioned the present embodiment, the operation principle of magnetic separator is: sorting material is after removing slightly every slag, ore pulp is squeezed into vibratory feed unit 4 with sand pump, after vibratory feed unit 4 vibration dispersions, enter in sorting groove 7, after ore pulp enters sorting groove 7, the flow action that ore particle is subject to bottom to break up water water pipe 10 is dispersity, after entering field regions (roughly selecting magnetic field, district), the magnetic ore particle is subject to the effect of permanent magnetic system 5 magnetic field forces and is adsorbed on cylinder 6 surfaces, with cylinder 6, rotate along clockwise direction, after entering selected district, magnetic field can be in a slight decrease, further reduce magnetic under the effect of current carries secretly simultaneously, improve concentrate grade, and in the constantly rolling under the magnetic pole effect of conversion of this process middling particle, in this process, the non-magnetic particle (for example gangue particle) be mingled with wherein will further be cleaned out, in material, magnetic part is close to cylinder 6 surfaces and is rotated to concentrate bucket 2, unloading mineral water by the concentrate sprayed in flushing water water pipe 1 again sweeps away it to discharge, non-magnetic material becomes mine tailing, from the mine tailing discharge gate 3 of sorting cell body bottom, discharge.
In follow-on permanent-magnet chamber type of the present embodiment magnetic separator simple in structure, magnetic Circuit Design is reasonable, Distribution of Magnetic Field is even, can be with short period and path implement selected to selected mineral aggregate, and improve the quality of mineral aggregate.
Contrast experiment: in three kinds, the magnetic cobbing comparative experimental research of strong magnetic machine.
Because ilmenite magnetic is more weak, in need to using when reclaiming, strong magnetic separator, our domestic middle high gradient strong magnetic separator mainly contains the permanent magnetism that SHP strong magnetic separator, the vertical ring type strong magnetic separator of SLON and the present invention adopt now several large classes such as intensity magnetic separator in cartridge type (being called for short magnetic separator in permanent-magnet chamber type).We have carried out respectively the direct sorting test of iron selection tailings (not carrying out ore grinding) with above-mentioned three kinds of magnetic separators, result of the test sees the following form respectively 3, table 4 and table 5.
Table 3:SHP strong magnetic separator magnetic separation result of the test
The vertical ring type strong magnetic separator result of the test of table 4:SLON
Table 5: the permanent-magnet chamber type high intensity magnetic separation result of the test in the present embodiment above-mentioned steps (1)
From table 3～table 5, can find out, in the contrast experiment of above three kinds of equipment, the SHP concentrate grade is higher, the rate of recovery>80%, comparatively speaking, although in the permanent-magnet chamber type used in technique of the present invention, magnetic separator is tested concentrate quality lower than SHP, but the rate of recovery is higher, result is more reasonable; Separately, from the investment price of equipment, in the permanent-magnet chamber type used in technique of the present invention, magnetic separator is more cheap comparatively speaking.
Claims (10)
1. the method for a low energy consumption separating ilmenite from select the ironworks mine tailing comprises the following steps:
(1) permanent-magnet chamber type high intensity magnetic separation: take and select the ironworks mine tailing as raw material, first adopt magnetic separator in permanent-magnet chamber type to carry out sorting to this mine tailing, non-magnetic material is directly as magnetic tailing discharge, as the middle magnetic concentrate of magnetic material, enters next step;
(2) ore grinding: the middle magnetic concentrate obtained after step (1) is carried out to ore grinding, make wherein ilmenite effectively realize monomer dissociation, mog is controlled and is accounted for 75%～95% for-75 μ m;
(3) low intensity magnetic separation: utilize weak magnetic separator to carry out low intensity magnetic separation to the middle magnetic concentrate obtained after step (2), sub-elect iron ore concentrate wherein, the residue mineral aggregate enters next step;
(4) flotation operation: the residue mineral aggregate after step (3) is first roughly selected, and the concentrate after roughly selecting carries out repeatedly selected acquisition ilmenite concentrate; Mine tailing after roughly selecting is scanned, and the useful mineral aggregate after scanning remerges repeatedly mine tailing material after selected and is back to and roughly selects step, and the mine tailing material after scanning is discharged as final titanium mine tailing.
2. method according to claim 1, is characterized in that: the described repeatedly selected selected operation that comprises at least four times; The useful mineral aggregate of primary cleaning operation enters recleaning, and the mine tailing material of primary cleaning is back to primary dcreening operation; The useful mineral aggregate of recleaning operation enters triple cleaning, and the mine tailing material of recleaning is back to the primary cleaning operation; By that analogy.
3. method according to claim 2, it is characterized in that: in described rougher process, select sulfuric acid as the pH adjusting agent, select waterglass as inhibitor, pH adjusts between 5.0～5.6; Repeatedly in refining process, each sulfuric acid that uses is as the pH adjusting agent, and pH adjusts between 4.5～5.5.
4. according to claim 1,2 or 3 described methods, it is characterized in that: in described permanent-magnet chamber type, the background lectromagnetism field of magnetic separator is 6000～12000 Gausses.
5. according to claim 1,2 or 3 described methods, it is characterized in that: in described permanent-magnet chamber type, magnetic separator comprises feed hopper, permanent magnetic system, cylinder and sorting groove, described permanent magnetic system is installed in cylinder, sorting groove is located at the cylinder below, the middle part of described sorting groove bottom surface is provided with the mine tailing discharge gate, sorting groove one side is provided with the concentrate bucket, and sorting groove opposite side top is provided with feed hopper; The sorting groove bottom surface of close feed hopper is laid with many and breaks up the water water pipe, breaks up the surface of the mouth of pipe of water water pipe towards the cylinder that is positioned at top; Described concentrate bucket top is provided with the flushing water water pipe, and the mouth of pipe of flushing water water pipe is towards the surface of the cylinder that is positioned at the one side.
6. method according to claim 5 is characterized in that: form the sorting runner of a semicircular arc between described sorting groove bottom surface and cylinder, in described sorting runner, the flow direction of material and turning to of described cylinder are consistent.
7. method according to claim 5, it is characterized in that: described feed hopper is the oscillatory type feed hopper, described oscillatory type feed hopper comprises feeder trough, vibrating motor and suspension screw rod, and described feeder trough is installed location by hanging screw rod, and vibrating motor is installed in feeder trough one side.
8. method according to claim 7, it is characterized in that: the cloth charge level of described feeder trough tilts, and itself and horizontal plane form the inclination angle of 10 °～15 °, and the angle of inclination of described cloth charge level is regulated by hanging screw rod; Described vibrating motor has the eccentric rotor structure be rotated counterclockwise.
9. method according to claim 5, it is characterized in that: between described concentrate bucket and sorting groove, by a mine-separating board, separate, described mine-separating board extends upwardly to the surface near cylinder from the sorting groove bottom surface, the mouth of pipe of described flushing water water pipe is aimed at the intersection zone of plane, mine-separating board place and cylinder surface.
10. method according to claim 6 is characterized in that: described sorting runner take the mine tailing discharge gate as boundary line delimitation for roughly selecting district and selected district, and it is higher to roughly select the selected district of magnetic pole density ratio in district; Described many are broken up the water water pipe for being arranged parallel to each other, and many are broken up the water water pipe and are distributed in roughly selecting in district between mine tailing discharge gate and feed hopper.
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