CN115155795A - Beneficiation process for fine-particle complex zirconium-titanium ore and application of beneficiation process - Google Patents
Beneficiation process for fine-particle complex zirconium-titanium ore and application of beneficiation process Download PDFInfo
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- CN115155795A CN115155795A CN202210723982.1A CN202210723982A CN115155795A CN 115155795 A CN115155795 A CN 115155795A CN 202210723982 A CN202210723982 A CN 202210723982A CN 115155795 A CN115155795 A CN 115155795A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000010419 fine particle Substances 0.000 title claims abstract description 18
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 title claims description 14
- 239000012141 concentrate Substances 0.000 claims abstract description 158
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 110
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 103
- 239000004576 sand Substances 0.000 claims abstract description 94
- 230000002000 scavenging effect Effects 0.000 claims abstract description 72
- 238000000926 separation method Methods 0.000 claims abstract description 44
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 30
- 239000006148 magnetic separator Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005456 ore beneficiation Methods 0.000 claims 4
- 239000007787 solid Substances 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 13
- 239000011707 mineral Substances 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 13
- 230000005484 gravity Effects 0.000 abstract description 12
- 239000010936 titanium Substances 0.000 abstract description 12
- 229910052719 titanium Inorganic materials 0.000 abstract description 12
- 238000007885 magnetic separation Methods 0.000 abstract description 8
- 230000000704 physical effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
The invention discloses a beneficiation process of fine-particle complex zircon-titanium ore, which comprises the steps of magnetic separation of ilmenite, separation and rough separation of zircon sand, rutile, gangue and other minerals, fine separation of zircon sand, fine separation of rutile and scavenging of tailings. The method fully utilizes the differences of the magnetic properties, specific gravity, granularity and other physical properties of different minerals such as ilmenite, zircon sand, rutile, gangue and the like. Ilmenite is preferentially selected through magnetic separation, gravity separation is carried out by utilizing the specific gravity difference of different minerals, the performance of different devices is combined, the devices with different performances are combined in a targeted and organic mode, separation of zircon sand, rutile and gangue is realized through concentration and scavenging, the recovery rate of high-quality zircon sand concentrate and rutile concentrate is ensured while high-quality zircon sand concentrate and rutile concentrate are obtained, and the process design is advanced and reasonable.
Description
Technical Field
The invention belongs to the technical field of beneficiation, and particularly relates to a beneficiation process for fine-particle complex zircon-titanium ore and application thereof.
Background
In recent years, titanium and zirconium are used as important resources and widely applied in the industries such as navigation, aerospace, communication, war industry, medical treatment, petrochemical industry, nuclear energy and the like.
At present, the industries of titanium dioxide, reduced titanium, titanium smelting, ceramics, metal zirconium, composite zirconium, nuclear grade sponge zirconium and the like need about 500 ten thousand tons of ilmenite concentrate every year, more than 100 ten thousand tons of zircon sand, and most of the demands depend on import. The high-quality titanium-zirconium concentrate is mainly obtained by separating zirconium-titanium placer, along with the exploitation of resources, the high-quality zirconium-titanium placer in Europe, africa and the like is less and less, the imported titanium-zirconium rough ore has poorer and thinner quality, even the imported zirconium-titanium placer is the difficultly-selected tailings left after selecting high-quality ilmenite, rutile, zircon sand and other easily-selected minerals, the process adopted by the existing titanium-zirconium ore dressing plant is always that after primary separation and enrichment by shaking tables or spiral slip, drying is carried out, dry magnetic dressing and electric dressing are carried out, generally, the qualified concentrate can be obtained by carrying out dry-wet alternate multiple dressing, the recovery efficiency is low, the cost is high, the labor intensity is high, and when the difficultly-selected fine-particle zirconium-titanium placer is encountered, the process adopted by the zirconium-titanium placer dressing plant is more difficult to recover.
Therefore, the technical personnel in the field need to solve the problem of providing a beneficiation process with high recovery rate, low cost and simple process.
Disclosure of Invention
The invention fully utilizes the differences of the physical properties such as magnetism, specific gravity, granularity and the like of different minerals such as ilmenite, zircon sand, rutile, gangue and the like, preferentially selects ilmenite through magnetic separation, reselects by utilizing the specific gravity difference of the different minerals, combines the performances of different devices, pertinently and organically combines the devices with different performances, realizes the separation of zircon sand, rutile and gangue through selection and scavenging, ensures the recovery rate of high-quality zircon sand concentrate and rutile concentrate at the same time, has advanced and reasonable process design, and can obtain good technical indexes of similar ore by adopting the technology of the invention.
In order to achieve the purpose, the invention adopts the following technical scheme:
a beneficiation process for fine-particle complex zircon-titanium ore specifically comprises the following steps:
(1) Ilmenite grading operation:
uniformly mixing zirconium-titanium placer and water, and then roughing the mixture by a roughing magnetic separator to obtain roughed concentrate and roughed tailings;
the rough concentration concentrate is subjected to fine concentration through a fine concentration magnetic separator to obtain fine concentration concentrate and fine concentration tailings;
scavenging the roughing tailings by a scavenging magnetic separator to obtain scavenging concentrate and scavenging tailings;
wherein the concentrated concentrate is ilmenite concentrate;
(2) Separating and roughing zircon sand and rutile:
feeding the scavenged tailings obtained in the step (1) into a roughing spiral chute for separation to obtain zircon sand rough concentrate, rutile rough concentrate and roughing tailings;
(3) The fine selection operation of the zircon sand rough concentrate:
adding water into the zircon sand rough concentrate obtained in the step (2) for slurry preparation, and then sequentially carrying out first spiral chute zircon sand concentration, second spiral chute zircon sand concentration and third spiral chute zircon sand concentration to obtain concentrate of third concentrated zircon sand; wherein, the tailings of the first selected zircon sand are subjected to table scavenging and table selection in sequence to obtain table-selection concentrate;
combining the concentrate of the third selected zircon sand and the concentrate of the table concentrator to obtain zircon sand concentrate;
(4) And (3) concentration operation of rough rutile concentrate:
adding water into the rough rutile concentrate obtained in the step (2) for pulp preparation, and sequentially carrying out first spiral chute rutile concentration, second spiral chute rutile concentration and third spiral chute rutile concentration, wherein tailings of the third spiral chute rutile concentration are rutile concentrate; the second spiral chute rutile rough concentrate concentration and the third spiral chute rutile rough concentrate concentration are middlings of the first concentration rutile and the second concentration rutile respectively;
(5) Tailing scavenging operation:
combining the rougher tailings in the step (2) and the tailings of the first choice rutile in the step (4), and performing first scavenging by using a concentrating machine to obtain first tailing scavenging concentrate and first tailing scavenging tailings;
concentrating the first tailing scavenging concentrate by using a concentrating machine to obtain tailing concentrated concentrate, tailing concentrated middlings and tailing concentrated tailings, and feeding the tailing concentrated concentrate into the third spiral chute rutile concentration in the step (4);
and performing secondary scavenging on the first tailing scavenged tailings by using a concentrating machine to obtain second tailing scavenged concentrate and second tailing scavenged tailings, returning the second tailing scavenged concentrate and the middlings in the tailing concentration to the primary scavenging for secondary separation, and taking the tailing concentration tailings and the second tailing scavenged tailings as final tailings.
Preferably, in the step (1), the mass ratio of the zircon placer to the water is 0.9-1;
the magnetic separator is a vertical ring pulsating high-gradient magnetic separator, and the magnetic medium box is made of a magnetic conductive stainless steel bar with the diameter of phi 2mm and a non-magnetic conductive stainless steel plate;
the magnetic field intensity of the roughing magnetic separator is 0.6-0.7T, the revolving speed is 3-3.5r/min, the pulse stroke is 20-24mm, and the pulse frequency is 240-260 times/min; the magnetic field intensity of the fine selection magnetic separator is 0.5-0.6T, the revolving speed is 2.5-3r/min, the pulse stroke is 25-30mm, and the pulse frequency is 270-300 times/min; the magnetic field intensity of the scavenging and magnetic separation machine is 0.8-0.9T, the revolving speed is 3-3.5r/min, the pulse stroke is 18-22mm, and the pulse frequency is 220-240 times/min;
and combining the scavenging concentrate and the concentration tailings and returning to the roughing.
Preferably, the solid-to-liquid ratio of the scavenged tailings in the step (2) is 0.7-1;
in the step (2), the spiral chute is phi 1.2m, the thread pitch is 600mm, and the spiral ring is 5 circles.
Preferably, the solid-to-liquid ratio of the slurry in the step (3) is 0.7-1;
the spiral chute is a spiral chute with phi 0.9m, a screw pitch of 580mm, 6 turns of spiral, phi 0.9m, a screw pitch of 550mm, 5 turns of spiral and phi 0.9m, a screw pitch of 550mm and 5 turns of spiral;
the second spiral chute zircon sand fine concentration and the third spiral chute zircon sand rough concentrate fine concentration are respectively adopted as a concentrate of first fine zircon sand and a concentrate of second fine zircon sand; the solid-to-liquid ratio of the concentrate of the first concentrated zircon sand is 0.6-0.8;
the tailings of the third selected zircon sand return to the concentrate of the second selected zircon sand for secondary separation, and the tailings of the second selected zircon sand return to the concentrate of the first selected zircon sand for secondary separation;
and returning the tailings scavenged by the table concentrator to the second spiral chute rutile rough concentrate fine concentration for secondary separation, and returning the tailings scavenged by the table concentrator to the table concentrator for secondary separation.
Preferably, the stroke of the shaking table in step (3) is 11-16mm, and the stroke frequency is 290-320 times/min.
Preferably, the solid-liquid ratio of the slurry in the step (4) is 0.7-1;
the spiral chute is a spiral chute with phi 1.2m, a pitch of 720mm, 5 turns of helicoid, phi 0.9m, a pitch of 550mm, 5 turns of helicoid and phi 0.9m, a pitch of 450mm and 5 turns of helicoid in sequence;
feeding the concentrate of the first concentrating rutile into the first spiral chute zircon sand rough concentrate concentrating in the step (3);
the concentrate and the tailings of the second concentrating rutile return to the first spiral chute rutile rough concentrate concentrating for secondary separation; the solid-to-liquid ratio of middlings of the second concentrating rutile is 0.6-0.8;
the concentrate of the third concentrating rutile returns to the second spiral chute rutile rough concentrate concentration for secondary separation; the solid-to-liquid ratio of the middlings of the third beneficiated rutile is 0.6-0.8.
Preferably, the concentrator in the step (5) is a spherical vibration concentrator, and the diameter is 4.5m.
Preferably, the vibration frequency of the first scavenging in the step (5) is 32-35Hz, and the rotation frequency is 8-11Hz;
the vibration frequency of the second scavenging is 28-32Hz, and the rotation frequency is 10-13Hz;
the selected vibration frequency is 35-38Hz, and the rotation frequency is 9-12Hz. .
The beneficiation process is applied to the fine-particle complex zircon-titanium ore.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the difference of the physical properties of mineral particles, a magnetic-gravity separation complete technology combining magnetic separation, a spiral chute, a table concentrator, a spherical vibration-rotation ore separator and the like is developed;
(2) According to the invention, ilmenite with a specific gravity between that of rutile and zircon sand is preferentially sorted by utilizing magnetic separation, the complexity of mineral composition of a gravity separation system is reduced, the specific gravity difference between minerals is indirectly enlarged, the processing capacity of the gravity separation system is increased, and the physical separation efficiency of rutile and zircon sand is also improved;
(3) The invention adopts a pure physical beneficiation method of a full wet method, has smooth process, easy management and lower cost, and can increase or reduce concentration scavenging pertinently according to different ore sand mineral contents.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flow chart of a beneficiation process of fine-particle complex zirconite according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to figure 1, the beneficiation process of fine-particle complex zircon-titanium ore, australia import fine-particle zircon-titanium placer middling, tiO in the middling tailings 2 、Zr(Hf)O 2 The content is respectively 30.6 percent and 7.5 percent, and the method specifically comprises the following steps:
(1) Ilmenite grading operation:
preparing uniform ore pulp from zirconium-titanium placer and water according to a mass ratio of 0.9 to 2, feeding the uniform ore pulp into a roughing vertical-ring pulsating high-gradient magnetic separator, concentrating roughing concentrate (magnetic product) to a solid-to-liquid ratio of 0.8, feeding the roughing concentrate into a concentrating vertical-ring pulsating high-gradient magnetic separator, feeding roughing tailings into a scavenging vertical-ring pulsating high-gradient magnetic separator, combining scavenging concentrate and concentrating tailings, returning the scavenging concentrate to roughing, wherein the concentrating concentrate is ilmenite concentrate, and the scavenging tailings enter zircon sand and rutile separation and separation operation;
wherein the magnetic field intensity of the roughing magnetic separator is 0.7T, the revolving speed is 3r/min, the pulse stroke is 20mm, and the pulse frequency is 250 times/min;
the magnetic field intensity of the magnetic separator is selected to be 0.6T, the revolving speed is 2.5r/min, the pulse stroke is 25mm, and the pulse frequency is 300 times/min;
the magnetic field intensity of the scavenging magnetic separator is 0.9T, the revolving speed is 3r/min, the pulse stroke is 18mm, and the pulse frequency is 220 times/min;
(2) Separating and roughing zircon sand and rutile:
concentrating the scavenged tailings obtained in the step (1), ensuring that the concentrated underflow solid-liquid ratio is 1:2, feeding the concentrated underflow solid-liquid ratio into a spiral chute with the diameter of 1.2m, the pitch of 600mm and the spiral turn of 5 circles, and separating and roughing to obtain zircon sand rough concentrate, rutile rough concentrate and roughed tailings; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
(3) The fine selection operation of the zircon sand rough concentrate:
adding water into the zircon sand rough concentrate to prepare slurry, ensuring that the solid-to-liquid ratio after slurry preparation is between 0.8 and 2, feeding the prepared slurry into a spiral chute with the diameter of phi 0.9m to carry out first spiral chute zircon sand rough concentrate concentration, namely first concentrated zircon sand, adding water into the concentrate of the first concentrated zircon sand to prepare slurry until the solid-to-liquid ratio is between 0.8 and 2, and feeding the concentrate into the spiral chute with the diameter of phi 0.9m to carry out second concentration, namely second concentrated zircon sand; feeding the concentrate of the second selected zircon sand into a spiral chute with the diameter of phi 0.9m for third selection, namely, third selected zircon sand; returning the tailings of the third selected zircon sand to the second selection for secondary separation, returning the tailings of the second selection to the first selection for secondary separation, and feeding the tailings of the first selected zircon sand into a shaking table for zircon scavenging, namely the zircon shaking table scavenging; feeding the zircon scavenging concentrate into a table concentrator for concentration, namely performing zircon table concentration, combining the table concentrator concentrate with the third concentrated zircon sand concentrate to obtain zircon sand concentrate, returning the table scavenging tailings to the second spiral chute rutile rough concentrate for concentration and sorting again, and returning the table concentrator tailings to the table concentrator for scavenging and sorting again; wherein the spiral chute is a spiral chute with phi 0.9m, a screw pitch of 580mm, 6 turns of helicoids, phi 0.9m, a screw pitch of 550mm, 5 turns of helicoids, phi 0.9m, a screw pitch of 550mm and 5 turns of helicoids, the stroke of the shaking table is 15mm, and the number of strokes is 300 times/min;
(4) And (3) concentration operation of rough rutile concentrate:
adding water into the rutile rough concentrate obtained in the step (2) for pulp blending, ensuring that the solid-to-liquid ratio is 0.8 after pulp blending, feeding the blended ore pulp into a spiral chute with the diameter of phi 0.9m for rutile first-time concentration, namely, first-spiral-chute rutile ore concentration, feeding the concentrate obtained by the first-spiral-chute rutile concentration into the first-spiral-chute zircon sandstone concentration obtained in the step (3), adding water into middlings obtained by the first-spiral-chute rutile concentration for pulp blending until the solid-to-liquid ratio is 0.7, and feeding into a spiral chute with the diameter of phi 0.9m for second-time concentration, namely, second-spiral-chute rutile concentration; the concentrate and the tailings of the second spiral chute rutile concentration are returned to the first spiral chute rutile concentration for re-separation, and the middlings of the second spiral chute rutile concentration are added with water and mixed with slurry until the solid-liquid ratio is between 0.7 and 2 and fed into a spiral chute with the diameter of phi 0.9m for third concentration, namely, the third spiral chute rutile concentration; the concentrate of the third spiral chute rutile concentration is returned to the second spiral chute rutile concentration for secondary separation, and the tailings of the third spiral chute rutile concentration are the rutile concentrate; combining the tailings of the first concentrating rutile and the roughed tailings in the step (2) and feeding the tailings into a tailing scavenging operation for selection; wherein the spiral chute is a spiral chute with phi 1.2m, a pitch of 720mm, 5 turns of spiral, phi 0.9m, a pitch of 550mm, 5 turns of spiral and phi 0.9m, a pitch of 450mm and 5 turns of spiral; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
(5) Tailing scavenging operation
Combining the roughed tailings in the step (2) and the tailings obtained by the first spiral chute rutile refining in the step (4), concentrating the combined tailings, ensuring that the solid-to-liquid ratio of the concentrated underflow is 0.8; feeding the concentrate subjected to the first scavenging into a spherical vibration-rotation concentrating machine for concentrating, feeding the concentrated concentrate subjected to the first scavenging into the rutile concentration sorting by a third spiral chute in the step (4), merging the concentrate subjected to the second tailing scavenging with the concentrated middling, returning to the first scavenging for re-sorting, and merging the tailing concentrated tailings and the second tailing scavenging tailings to serve as final tailings; wherein the vibration frequency of the first time of sweeping is 32Hz, the rotation frequency is 11Hz, the vibration frequency of the second time of sweeping is 28Hz, the rotation frequency is 10Hz, the selected vibration frequency is 38Hz, and the rotation frequency is 10Hz; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
finally obtaining ilmenite concentrate TiO 2 The content is 53.8 percent, and the recovery rate is 55.21 percent; zircon sand concentrate Zr (Hf) O 2 The content is 63.5 percent, and the recovery rate is 95.35 percent; rutile concentrate TiO 2 The content is 69.4 percent, and the recovery rate is 41.73 percent; ilmenite concentrate and rutile concentrate TiO 2 The total recovery rate reaches 96.94 percent.
Example 2
As shown in figure 1, the beneficiation process of the fine-particle complex zircon-titanium ore is African imported fine-particle zircon-titanium placer, and TiO in the ore 2 、Zr(Hf)O 2 The contents are respectively 22.3% and 16.8%, and the method specifically comprises the following stepsThe method comprises the following steps:
(1) Ilmenite grading operation:
preparing uniform ore pulp from zirconium-titanium placer and water according to a mass ratio of 0.9 to feed the uniform ore pulp into a roughing vertical-ring pulsating high-gradient magnetic separator, concentrating roughing concentrate (magnetic product) to a solid-to-liquid ratio of 0.8 to feed the roughing concentrate into a concentrating vertical-ring pulsating high-gradient magnetic separator, feeding roughing tailings into a scavenging ring pulsating high-gradient magnetic separator, combining scavenging concentrate and concentrating tailings to return to roughing, wherein the concentrating concentrate is ilmenite concentrate, and the scavenging tailings enter zircon sand and rutile separation and sorting operation;
wherein the magnetic field intensity of the roughing magnetic separator is 0.8T, the revolving speed is 3.5r/min, the pulse stroke is 22mm, and the pulse frequency is 260 times/min;
the magnetic field intensity of the magnetic separator is 0.6T, the revolving speed is 2.5r/min, the pulse stroke is 25mm, and the pulse frequency is 320 times/min;
the magnetic field intensity of the scavenging magnetic separator is 1.1T, the revolving speed is 3.5r/min, the pulse stroke is 18mm, and the pulse frequency is 220 times/min;
(2) Separating and roughing zircon sand and rutile:
concentrating the scavenged tailings obtained in the step (1), ensuring that the concentrated underflow solid-liquid ratio is 1:2, feeding the concentrated underflow solid-liquid ratio into a spiral chute with the diameter of 1.2m, the pitch of 600mm and the spiral turn of 5 circles, and separating and roughing to obtain zircon sand rough concentrate, rutile rough concentrate and roughed tailings; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
(3) The fine selection operation of the zircon sand rough concentrate:
adding water into the zircon sand rough concentrate to prepare slurry, ensuring that the solid-to-liquid ratio after slurry preparation is between 0.8 and 2, feeding the prepared slurry into a spiral chute with the diameter of phi 0.9m to carry out first spiral chute zircon sand rough concentrate concentration, namely first concentrated zircon sand, adding water into the concentrate of the first concentrated zircon sand to prepare slurry until the solid-to-liquid ratio is between 0.8 and 2, and feeding the concentrate into the spiral chute with the diameter of phi 0.9m to carry out second concentration, namely second concentrated zircon sand; feeding the concentrate of the second selected zircon sand into a spiral chute with the diameter of phi 0.9m for third selection, namely, third selected zircon sand; returning the tailings of the third selected zircon sand to the second selection for secondary separation, returning the tailings of the second selection to the first selection for secondary separation, and feeding the tailings of the first selected zircon sand into a shaking table for zircon scavenging, namely the zircon shaking table scavenging; feeding the zircon scavenging concentrate into a table concentrator for concentration, namely performing zircon table concentration, combining the table concentrator concentrate with the third concentrated zircon sand concentrate to obtain zircon sand concentrate, returning the table scavenging tailings to the second spiral chute rutile rough concentrate for concentration and sorting again, and returning the table concentrator tailings to the table concentrator for scavenging and sorting again; wherein the spiral chute is a spiral chute with phi 0.9m, a screw pitch of 580mm, 6 turns of helicoids, phi 0.9m, a screw pitch of 550mm, 5 turns of helicoids, phi 0.9m, a screw pitch of 550mm and 5 turns of helicoids, the stroke of the shaking table is 15mm, and the number of strokes is 300 times/min;
(4) And (3) concentration operation of rough rutile concentrate:
adding water into the rutile rough concentrate obtained in the step (2) for pulp blending, ensuring that the solid-to-liquid ratio after pulp blending is 0.8; the concentrate and the tailings of the second spiral chute rutile concentration are returned to the first spiral chute rutile concentration for re-separation, and the middlings of the second spiral chute rutile concentration are added with water to prepare slurry until the solid-to-liquid ratio is between 0.7 and 2 and are fed into a spiral chute with the diameter of phi 0.9m for third concentration, namely, the third spiral chute rutile concentration; the concentrate of the third spiral chute rutile concentration is returned to the second spiral chute rutile concentration for secondary separation, and the tailings of the third spiral chute rutile concentration are the rutile concentrate; combining the tailings of the first concentrating rutile and the roughed tailings in the step (2) and feeding the tailings into a tailing scavenging operation for selection; wherein the spiral chute is a spiral chute with phi 1.2m, a pitch of 720mm, 5 turns of spiral, phi 0.9m, a pitch of 550mm, 5 turns of spiral and phi 0.9m, a pitch of 450mm and 5 turns of spiral; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
(5) Tailing scavenging operation
Combining the roughed tailings in the step (2) with the tailings obtained by the first spiral chute rutile refining in the step (4), concentrating the combined roughed tailings to ensure that the solid-to-liquid ratio of the concentrated underflow is 0.8; feeding the concentrate subjected to the first scavenging into a spherical vibration-rotation concentrating machine for concentrating, feeding the concentrated concentrate subjected to the spherical vibration-rotation concentrating machine into a third spiral chute rutile concentrating and sorting step (4), combining the concentrate subjected to the second tailing scavenging with the concentrated middling, returning to the first scavenging for sorting again, and combining the tailing concentrated tailings with the second tailing scavenging tailings to be used as final tailings; wherein the vibration frequency of the first scavenging is 32Hz, the rotation frequency is 12Hz, the vibration frequency of the second scavenging is 28Hz, the rotation frequency is 10Hz, the selected vibration frequency is 35Hz, and the rotation frequency is 10Hz; concentrating by adopting an inclined plate high-efficiency concentrating hopper;
finally obtaining ilmenite concentrate TiO 2 The content is 53.2 percent, and the recovery rate is 15.30 percent; zircon sand concentrate Zr (Hf) O 2 The content is 63.6 percent, and the recovery rate is 65.6 percent; rutile concentrate TiO 2 The content is 70.4 percent, and the recovery rate is 76.85 percent; ilmenite concentrate and rutile concentrate TiO 2 The total recovery rate reaches 92.15 percent.
The embodiment of the invention discloses a beneficiation process of fine-particle complex zircon-titanium ore, which comprises the steps of titanic iron ore magnetic separation, separation and rough separation of zircon sand, rutile, gangue and other minerals, fine separation of zircon sand, fine separation of rutile and scavenging of tailings. The method fully utilizes the differences of the magnetic properties, specific gravity, granularity and other physical properties of different minerals such as ilmenite, zircon sand, rutile, gangue and the like. Ilmenite is preferentially selected through magnetic separation, gravity separation is carried out by utilizing the specific gravity difference of different minerals, the performance of different devices is combined, the devices with different performances are combined pertinently and organically, separation of zircon sand, rutile and gangue is realized through concentration and scavenging, the recovery rate of high-quality zircon sand concentrate and rutile concentrate is ensured while high-quality zircon sand concentrate and rutile concentrate are obtained, the process design is advanced and reasonable, and similar ore can obtain good technical indexes by adopting the technology disclosed by the invention.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The beneficiation process of the fine-particle complex zirconite is characterized by comprising the following steps:
(1) Ilmenite grading operation:
uniformly mixing zirconium-titanium placer and water, and then roughing the mixture by a roughing magnetic separator to obtain roughed concentrate and roughed tailings;
the rough concentration concentrate is subjected to fine concentration through a fine concentration magnetic separator to obtain fine concentration concentrate and fine concentration tailings;
scavenging the roughing tailings by a scavenging magnetic separator to obtain scavenging concentrate and scavenging tailings;
wherein the concentrated concentrate is ilmenite concentrate;
(2) Separating and roughing zircon sand and rutile:
feeding the scavenged tailings obtained in the step (1) into a roughing spiral chute for separation to obtain zircon sand rough concentrate, rutile rough concentrate and roughing tailings;
(3) The fine selection operation of the zircon sand rough concentrate:
adding water into the zircon sand rough concentrate obtained in the step (2) for slurry preparation, and then sequentially carrying out first spiral chute zircon sand concentration, second spiral chute zircon sand concentration and third spiral chute zircon sand concentration to obtain concentrate of third concentrated zircon sand; wherein, the tailings of the first selected zircon sand are subjected to table scavenging and table selection in sequence to obtain table-selection concentrate;
combining the concentrate of the third selected zircon sand and the concentrate selected by the table concentrator to obtain zircon sand concentrate;
(4) And (3) concentration operation of rough rutile concentrate:
adding water into the rutile rough concentrate obtained in the step (2) for pulp preparation, and then sequentially carrying out first spiral chute rutile concentration, second spiral chute rutile concentration and third spiral chute rutile concentration, wherein tailings of the third spiral chute rutile concentration are rutile concentrate; the second spiral chute rutile rough concentrate concentration and the third spiral chute rutile rough concentrate concentration are middlings of the first concentration rutile and the second concentration rutile respectively;
(5) And (3) tailing scavenging operation:
combining the rougher tailings in the step (2) and the tailings of the first selected rutile in the step (4), and performing first scavenging through a concentrating machine to obtain first tailing scavenging concentrates and first tailing scavenging tailings;
concentrating the first tailing scavenging concentrate by using a concentrating machine to obtain tailing concentrating concentrate, tailing concentrating middlings and tailing concentrating tailings, and feeding the tailing concentrating concentrate into the third spiral chute rutile concentrating in the step (4);
and carrying out second scavenging on the first tailing scavenged tailings by using a concentrating machine to obtain second tailing scavenged concentrate and second tailing scavenged tailings, returning the second tailing scavenged concentrate and the middlings in the tailing concentration to the first scavenging for secondary separation, and taking the tailing concentration tailings and the second tailing scavenged tailings as final tailings.
2. The beneficiation process of fine-grained complex zirconite according to claim 1, characterized in that the mass ratio of the zirconite to the water in step (1) is 0.9-1, and the solid-to-liquid ratio of the roughed concentrate is 0.8-0.9;
the magnetic separator is a vertical ring pulsating high-gradient magnetic separator, and the magnetic medium box is made of a magnetic conductive stainless steel bar with the diameter of phi 2mm and a non-magnetic conductive stainless steel plate;
the magnetic field intensity of the roughing magnetic separator is 0.6-0.7T, the revolving speed is 3-3.5r/min, the pulse stroke is 20-24mm, and the pulse frequency is 240-260 times/min; the magnetic field intensity of the fine selection magnetic separator is 0.5-0.6T, the revolving speed is 2.5-3r/min, the pulse stroke is 25-30mm, and the pulse frequency is 270-300 times/min; the magnetic field intensity of the scavenging magnetic separator is 0.8-0.9T, the revolving speed is 3-3.5r/min, the pulse stroke is 18-22mm, and the pulse frequency is 220-240 times/min;
and combining the scavenging concentrate and the concentration tailings and returning to the roughing.
3. The fine-grained complex zirconite beneficiation process according to claim 1, wherein the solid-to-liquid ratio of the scavenged tailings in step (2) is 0.7-1;
in the step (2), the spiral chute is phi 1.2m, the screw pitch is 600mm, and the spiral ring is 5 circles.
4. The fine particle complex zircotitanium ore beneficiation process according to claim 1, wherein the slurry in step (3) has a solid to liquid ratio of 0.7-1;
the spiral chute is a spiral chute with phi 0.9m, a screw pitch of 580mm, 6 turns of spiral, phi 0.9m, a screw pitch of 550mm, 5 turns of spiral and phi 0.9m, a screw pitch of 550mm and 5 turns of spiral;
the second spiral chute zircon sand fine concentration and the third spiral chute zircon sand rough concentrate fine concentration are respectively adopted as a concentrate of first fine zircon sand and a concentrate of second fine zircon sand; the solid-to-liquid ratio of the concentrate of the first concentrated zircon sand is 0.6-0.8;
the tailings of the third selected zircon sand return to the concentrate of the second selected zircon sand for secondary separation, and the tailings of the second selected zircon sand return to the concentrate of the first selected zircon sand for secondary separation;
and returning the tailings scavenged by the table concentrator to the second spiral chute rutile rough concentrate fine concentration for secondary separation, and returning the tailings scavenged by the table concentrator to the table concentrator for secondary separation.
5. The fine particle complex zircotitanium ore beneficiation process according to claim 1, wherein the stroke of the shaking table in the step (3) is 11-16mm, and the stroke frequency is 290-320 times/min.
6. The fine-grained complex zirconite beneficiation process according to claim 1, wherein the slurry in step (4) has a solid-to-liquid ratio of 0.7 to 1;
the spiral chute is a spiral chute with phi 1.2m, a pitch of 720mm, 5 turns of helicoid, phi 0.9m, a pitch of 550mm, 5 turns of helicoid and phi 0.9m, a pitch of 450mm and 5 turns of helicoid in sequence;
feeding the concentrate of the first concentrating rutile into the first spiral chute zircon sand rough concentrate concentrating in the step (3);
the concentrate and the tailings of the second selection rutile return to the first spiral chute rutile rough concentrate selection for secondary separation; the solid-to-liquid ratio of middlings of the second concentrating rutile is 0.6-0.8;
the concentrate of the third concentrating rutile returns to the second spiral chute rutile rough concentrate concentrating and re-sorting; the solid-to-liquid ratio of the middlings of the third beneficiated rutile is 0.6-0.8.
7. The fine particle complex zircotitanium ore beneficiation process according to claim 1, wherein in step (5), the ore concentrator is a spherical vibration and rotation ore concentrator, and the diameter is 4.5m.
8. The fine particle complex zircotitanium ore beneficiation process according to claim 1, wherein the vibration frequency of the first scavenging in the step (5) is 32-35Hz, and the rotation frequency is 8-11Hz;
the vibration frequency of the second scavenging is 28-32Hz, and the rotation frequency is 10-13Hz;
the selected vibration frequency is 35-38Hz, and the rotation frequency is 9-12Hz.
9. Use of the beneficiation process according to any one of claims 1 to 8, in fine-grained complex zirconite.
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