CN105080704A - Process for recycling tailings by utilizing combined type magnetic separator - Google Patents
Process for recycling tailings by utilizing combined type magnetic separator Download PDFInfo
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- CN105080704A CN105080704A CN201510585643.1A CN201510585643A CN105080704A CN 105080704 A CN105080704 A CN 105080704A CN 201510585643 A CN201510585643 A CN 201510585643A CN 105080704 A CN105080704 A CN 105080704A
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Abstract
The invention relates to a process for recycling tailings by utilizing a combined type magnetic separator. The process is characterized by comprising the following steps: feeding tailings into a first-section combined magnetic separator; feeding concentrates of the first-section combined magnetic separator into a first-section ore grinding system; feeding an ore discharge product of the first-section ore grinding system into a second-section combined magnetic separator; feeding concentrates of the second-section combined magnetic separator into a second-section ore grinding system; feeding an ore discharge product of the second-section ore grinding system into a third-section combined magnetic separator, wherein the concentrates of a first-stage magnetic ring of the third-section combined magnetic separator are concentrates of the third-section combined magnetic separator; taking concentrates of other magnetic rings in the third-section combined magnetic separator as a middling product, and feeding the middling product into a reverse flotation process with once roughing, twice-concentrating and three-time scavenging for grading; combining flotation concentrates and concentrates of a first-stage magnetic ring in the three-section combined magnetic separator as final concentrates with grade higher than TFe65%; and combining flotation tailings, tailings of the last-stage magnetic ring of the first-section combined magnetic separator, tailings of the last-stage magnetic ring of the second-section combined magnetic separator and tailings of the last-stage magnetic ring of the third-section combined magnetic separator as final tailings with grade of 6%-8%.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of technique utilizing combined type magnetic separator to reclaim mine tailing.
Background technology
Iron mineral mainly russet iron and the Armco magnetic iron run off in the mine tailing selecting factory to produce of current employing " stage grinding, coarse and fine separation; weight-magnetic-floating combined process flow ", recovery to comprehensive mine tailing is commonly at present to the recovery of mine tailing, or a part flotation tailing of comprehensive mine tailing is reclaimed.Comparatively select the technique of carrying out to be " two sections of spiral chutes, permanent magnetism-ore grinding-weak magnetic, Qiang Ci; reverse flotation (centrifuge) technique " to comprehensive mining tailing, flotation tailing is reclaimed and comparatively selects the technique of carrying out to be " weak magnetic, strong magnetic-regrind-weak magnetic, Qiang Ci, reverse flotation (centrifuge) technique ".Due to the main iron mineral bloodstone in mine tailing and magnetic iron ore granularity all very thin, in existing two kinds of tailings recovery process, grinding particle size is at 90%-325 order ~ 95%-400 order, weak magnetic separation equipment many employings wet drum magnetic separator, ring pulsation intensity magnetic separator is found in the many employings of high intensity magnetic separation equipment.On the one hand because drum magnetic separator adopts open circuit magnetic system, magnetic field force is little, gradient is very low, magnetic concentrate easy magnetization and form magnetic coagulation, and recovering effect easily to run off Magnetic Materials by the impact of gradient.On the other hand, vertical ring pulsation intensity magnetic separator magnetic induction intensity is on the weak side, and gradient is lower, and thus to catch power limited in magnetic field, easily forms the loss of fine fraction and ultra-fine grade magnetic mineral, weak magnetic mineral.The comprehensive mine tailing of grade 10% ~ 13% after " spiral chute, permanent magnetism-ore grinding-strong magnetic, centrifuge technique " sorts tailings grade 9% ~ 11%, the flotation tailing of grade 15% ~ 20% sorts rear tailings grade 10% ~ 11% through " weak magnetic, strong magnetic-regrind-weak magnetic, Qiang Ci, reverse floatation process ".After adopting above-mentioned two kinds of techniques to sort mine tailing, the higher problem of its tailings grade cannot solve, and causes the rate of recovery to be difficult to further raising.
Summary of the invention
The object of this invention is to provide a kind of concentrate grade that effectively can improve mine tailing and sort, realize reclaiming the technique of mine tailing to the combined type magnetic separator that utilizes of the high efficiente callback of iron mineral in mine tailing.
The object of the invention is to be realized by following technical proposals:
A kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, is characterized in that: comprise the following steps:
1) mine tailing is fed one section of combination magnetic separator, one section of described combination magnetic separator adopts the magnet ring combination magnetic separator of three grades of magnet ring combination magnetic separators or level Four, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, its magnetic field intensity is 0.1-2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, before one section of combination magnetic separator, the mine tailing of every one-level magnet ring gives ore deposit all as next stage magnet ring, and the mine tailing of the afterbody magnet ring of one section of combination magnetic separator throws tail; The concentrate of one section of combination magnetic separator feeds one section of ball mill, and the ore discharge product granularity of one section of ball mill is 97.5%-200 order,
2) the ore discharge product of one section of ball mill is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt the magnet ring combination magnetic separator of three grades of magnet ring combination magnetic separators or level Four, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, its magnetic field intensity is 0.2-1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, before two sections of combination magnetic separators, the mine tailing of every one-level magnet ring gives ore deposit all as next stage magnet ring, and the mine tailing of the afterbody magnet ring of two sections of combination magnetic separators throws tail; The concentrate of two sections of combination magnetic separators feeds two sections of ball mills, and the ore discharge product granularity of two sections of ball mills is 96.0%-500 order;
3) the ore discharge product of two sections of ball mills is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt the magnet ring combination magnetic separator of three grades of magnet ring combination magnetic separators or level Four, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, its magnetic field intensity is 0.2-1.6T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, before three sections of combination magnetic separators the mine tailing of every one-level magnet ring all as next stage magnet ring give ore deposit, the mine tailing of the afterbody magnet ring of three sections of combination magnetic separators throws tail,
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, grade is more than TFe65%, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator afterbody magnet ring, the mine tailing of two sections of combination magnetic separator afterbody magnet rings and three sections of combination magnetic separator afterbody magnet rings merges into true tailings, and grade is 6%-8%.
Described mine tailing to be grade be 10% ~ 13% comprehensive mine tailing and grade be 15% ~ 20% flotation tailing.
The magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field that the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T and third level magnet ring is 1.5-2.0T.
The magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field that the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.2-1.8T and fourth stage magnet ring be 1.5-2.0T and.
Described ball mill is tower grinding machine.
Advantage of the present invention is:
1) due to the combined type magnetic separator that the present invention adopts, have that magnetic system is closed, magnetic induction intensity is high, magnetizing mediums gradient is high, one-stop can obtain higher magnetic field force to features such as ore deposit segmentation combing formula magnetic separation, thus obtain high ferro yield and the high efficiency of separation;
2) the present invention combines magnetic separator is adopt three sections or four sections of magnet rings on an equipment, and the gradient of the magnetic field of improving step by step and Geng Gao is to reclaim iron mineral, the magnetic field of first paragraph is at 0.1T ~ 0.3T, be mainly used in reclaiming strongly magnetic mineral, the most highfield of final stage reaches 2.0T, effectively can reclaim the bloodstone of microfine;
3) mine tailing of multistage magnet ring combination magnetic separator every grade feeds next stage, therefore ore deposit grade of giving at different levels reduces gradually, guarantee that the tailings grade that afterbody is abandoned is lower, simultaneously can obtain more high-grade concentrate in the first order, the concentrate of intergrade can also can as chats as concentrate;
5) the present invention is by multistage magnet ring magnetic separation and multistage grinding combination, constantly throws tail, constantly dissociates, constantly enrichment, also reduces the ore deposit amount that ore grinding dissociates simultaneously;
6) adopt reverse floatation process again, chats is reclaimed further.
The present invention, by multistage magnet ring magnetic separation and multistage grinding, reverse floatation process, reclaims comprehensive mine tailing, can obtain more than concentrate grade TFe65%, productive rate is 7%-9%, the rate of recovery is the good index of 45%-50%.Flotation tailing is reclaimed, more than concentrate grade TFe65% can be obtained, productive rate is 18%-20%, the rate of recovery is the good index of 70%-75%.
Accompanying drawing explanation
Fig. 1 is the flow chart that three grades of magnet ring combined type magnetic separators of the present invention reclaim the technique of mine tailing.
Fig. 2 is the flow chart that level Four magnet ring combined type magnetic separator of the present invention reclaims the technique of mine tailing.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, a kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 10% ~ 13% comprehensive mine tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.5-2.0T, afterbody adopts high magnetic field intensity, effectively can reclaim the bloodstone of microfine; In one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 20% ~ 25%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of ball mill, the ore discharge product granularity of one section of ball mill is 95%-200 order;
2) the ore discharge product of one section of ball mill is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is the magnetic field of 1.0-1.5T and third level magnet ring is 1.5-2.0T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 28% ~ 33%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is more than 95%-500 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.1-0.3T, be mainly used in reclaiming strongly magnetic mineral, the magnetic field of second level magnet ring is the magnetic field of 1.0-1.5T and third level magnet ring is 1.5-2.0T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring throws tail as the mine tailing of ore deposit third level magnet ring of giving of third level magnet ring,
The present invention utilizes multistage magnet ring to combine magnetic separation and multistage mill combination technique, continuous throwing tail, constantly dissociate, constantly enrichment, effectively improve and throw tail efficiency, decrease the ore deposit amount that further ore grinding dissociates, effectively improve concentrate grade and the rate of recovery, reduction tailings grade and metal loss;
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, grade is 6% ~ 8%, and most more than final concentrate grade TFe65%, productive rate are 7%-9%, the rate of recovery is 45%-50%.
Embodiment 2
A kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 11.3% comprehensive mine tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.5T and third level magnet ring is 2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 22.95%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of ball mill, the ore discharge product granularity of one section of ball mill is 97.5%-200 order,
2) the ore discharge product of one section of tower grinding machine is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.2T and third level magnet ring is 1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 30.01%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is 96.5%-500 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.0T and third level magnet ring is 1.5T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring throws tail as the mine tailing of ore deposit third level magnet ring of giving of third level magnet ring,
Multistage magnet ring is utilized to combine magnetic separation and multistage mill combination technique, continuous throwing tail, constantly dissociate, constantly enrichment, effectively improve and throw tail efficiency, decrease the ore deposit amount needing further ore grinding to dissociate, effectively improve concentrate grade and the rate of recovery, reduce tailings grade and metal loss;
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, grade is TFe65.02%, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, and grade is 6.92%.
Embodiment 3
A kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 12.67% comprehensive mine tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.5T and third level magnet ring is 2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 23.35%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of ball mill, the ore discharge product granularity of one section of ball mill is 97.0%-200 order,
2) the ore discharge product of one section of tower grinding machine is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.2T and third level magnet ring is 1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 31.10%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is 96.75%-500 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt three grades of magnet ring combination magnetic separators, the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is the magnetic field of 1.0T and third level magnet ring is 1.5T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring throws tail as the mine tailing of ore deposit third level magnet ring of giving of third level magnet ring,
Multistage magnet ring is utilized to combine magnetic separation and multistage mill combination technique, continuous throwing tail, constantly dissociate, constantly enrichment, effectively improve and throw tail efficiency, decrease the ore deposit amount needing further ore grinding to dissociate, effectively improve concentrate grade and the rate of recovery, reduce tailings grade and metal loss;
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, grade is TFe65.01%, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, and grade is 7.31%.
Embodiment 4
As shown in Figure 2, a kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 15% ~ 20% flotation tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts level Four magnet ring combination magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.2-1.8T, the magnetic field of fourth stage magnet ring is 1.5-2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 20% ~ 25%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of tower grinding machine, the ore discharge product granularity of one section of ball mill is more than 95%-200 order,
2) the ore discharge product of one section of ball mill is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.2-1.8T, the magnetic field of fourth stage magnet ring is 1.5-2.0T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 30% ~ 35%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is more than 95%-500 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.2-1.8T, the magnetic field of fourth stage magnet ring is 1.5-2.0T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail,
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, grade is more than TFe65%, productive rate is 18%-20%, the rate of recovery is 70%-75%, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, and grade is 6% ~ 8%.
Embodiment 5
As shown in Figure 2, a kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 16.71% flotation tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts level Four magnet ring combination magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.5T, the magnetic field of third level magnet ring is 1.8T, the magnetic field of fourth stage magnet ring is 2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 21.34%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of ball mill, the ore discharge product granularity of one section of ball mill is 97.5%-200 order,
2) the ore discharge product of one section of ball mill is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.2T, the magnetic field of third level magnet ring is 1.5T, the magnetic field of third level magnet ring is 1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 31.01%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is 96.4%-200 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.0T, the magnetic field of third level magnet ring is 1.3T, the magnetic field of fourth stage magnet ring is 1.6T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail,
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its concentrate through reverse flotation and three sections of combination magnetic separators merges into final concentrate, grade is TFe65.00%, the mine tailing of the mine tailing of reverse flotation mine tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, and grade is 6.98%.
Embodiment 6
As shown in Figure 2, a kind of technique utilizing combined type magnetic separator to reclaim mine tailing of the present invention, comprises the following steps:
1) by grade be 18.05% flotation tailing feed one section of combination magnetic separator, one section of described combination magnetic separator adopts level Four magnet ring combination magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.5T, the magnetic field of third level magnet ring is 1.8T, the magnetic field of fourth stage magnet ring is 2.0T, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, the concentrate grade of one section combination magnetic separator is 23.25%, mine tailing the feeding as second level magnet ring of the first order magnet ring of one section of combination magnetic separator, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of one section of combination magnetic separator is fed one section of ball mill, the ore discharge product granularity of one section of ball mill is 94.5%-200 order,
2) the ore discharge product of one section of ball mill is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.2T, the magnetic field of third level magnet ring is 1.5T, the magnetic field of third level magnet ring is 1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, the concentrate grade of its two sections of combination magnetic separators is 33.19%, mine tailing the feeding as second level magnet ring of the first order magnet ring of two sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail, the concentrate of two sections of combination magnetic separators is fed two sections of tower grinding machines, the ore discharge product granularity of two sections of tower grinding machines is 96.7%-200 order,
3) the ore discharge product of two sections of tower grinding machines is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt level Four magnet ring to combine magnetic separator, the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.2T, the magnetic field of second level magnet ring is 1.0T, the magnetic field of third level magnet ring is 1.3T, the magnetic field of fourth stage magnet ring is 1.6T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, mine tailing the feeding as second level magnet ring of the first order magnet ring of three sections of combination magnetic separators, the mine tailing of second level magnet ring gives ore deposit as third level magnet ring, the mine tailing of third level magnet ring gives ore deposit as fourth stage magnet ring, the mine tailing of fourth stage magnet ring throws tail,
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its concentrate through reverse flotation and three sections of combination magnetic separators merges into final concentrate, grade is TFe65.02%, the mine tailing of the mine tailing of reverse flotation mine tailing and one section of combination magnetic separator third level magnet ring, the mine tailing of two sections of combination magnetic separator third level magnet rings and three sections of combination magnetic separator third level magnet rings merges into true tailings, and grade is 7.26%.
Claims (5)
1. utilize combined type magnetic separator to reclaim a technique for mine tailing, it is characterized in that: comprise the following steps:
1) mine tailing is fed one section of combination magnetic separator, one section of described combination magnetic separator adopts three grades of magnet ring combination magnetic separators or level Four magnet ring combination magnetic separator, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, in one section of combination magnetic separator, the concentrate of every one-level magnet ring merges into the concentrate of one section of combination magnetic separator, before one section of combination magnetic separator, the mine tailing of every one-level magnet ring gives ore deposit all as next stage magnet ring, and the mine tailing of the afterbody magnet ring of one section of combination magnetic separator throws tail; The concentrate of one section of combination magnetic separator feeds primary grinding system, and the ore discharge product granularity of primary grinding system is more than 95%-200 order,
2) the ore discharge product of primary grinding system is fed two sections of combination magnetic separators, two sections of described combination magnetic separators also adopt the magnet ring combination magnetic separator of three grades of magnet ring combination magnetic separators or level Four, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, its magnetic field intensity is 0.2-1.8T, in two sections of combination magnetic separators, the concentrate of every one-level magnet ring merges into the concentrate of two sections of combination magnetic separators, before two sections of combination magnetic separators, the mine tailing of every one-level magnet ring gives ore deposit all as next stage magnet ring, and the mine tailing of the afterbody magnet ring of two sections of combination magnetic separators throws tail; The concentrate of two sections of combination magnetic separators feeds secondary grinding system, and the ore discharge product granularity of secondary grinding system is 96.0%-500 order;
3) the ore discharge product of secondary grinding system is fed three sections of combination magnetic separators, three sections of described combination magnetic separators also adopt the magnet ring combination magnetic separator of three grades of magnet ring combination magnetic separators or level Four, the magnetic field intensity of described magnet ring combination magnetic separator is improved to senior step by step by rudimentary, its magnetic field intensity is 0.2-1.6T, the concentrate of the first order magnet ring in three sections of combination magnetic separators is the concentrate of three sections of combination magnetic separators, the concentrate of other magnet ring in three sections of combination magnetic separators is as chats product, before three sections of combination magnetic separators the mine tailing of every one-level magnet ring all as next stage magnet ring give ore deposit, the mine tailing of the afterbody magnet ring of three sections of combination magnetic separators throws tail,
4) the chats product of three sections of combination magnetic separators is fed the reverse floatation process that a thick essence three sweeps to sort, the concentrate of the first order magnet ring in its flotation concentrate and three sections of combination magnetic separators merges into final concentrate, grade is more than TFe65%, the mine tailing of the mine tailing of flotation tailing and one section of combination magnetic separator afterbody magnet ring, the mine tailing of two sections of combination magnetic separator afterbody magnet rings and three sections of combination magnetic separator afterbody magnet rings merges into true tailings, and grade is 6%-8%.
2. the combined type magnetic separator that utilizes according to claim 1 reclaims the technique of mine tailing, it is characterized in that described mine tailing to be grade be that comprehensive mine tailing and the grade of 10% ~ 13% is 15% ~ 20% flotation tailing.
3. the technique utilizing magnet ring combined type magnetic separator to reclaim mine tailing according to claim 1, it is characterized in that the magnetic field intensity of three grades of described magnet ring combination magnetic separators is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, and the magnetic field of third level magnet ring is 1.5-2.0T.
4. the technique utilizing combined type magnetic separator to reclaim mine tailing according to claim 1, it is characterized in that the magnetic field intensity of described level Four magnet ring combination magnetic separator is: the magnetic field of first order magnet ring is 0.1-0.3T, the magnetic field of second level magnet ring is 1.0-1.5T, the magnetic field of third level magnet ring is 1.2-1.8T, and the magnetic field of fourth stage magnet ring is 1.5-2.0T.
5. the technique utilizing combined type magnetic separator to reclaim mine tailing according to claim 1, it is characterized in that described primary grinding system adopts ball mill, secondary grinding system adopts tower grinding machine.
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Application publication date: 20151125 |