CN114682374A - Method for pre-selecting ilmenite from titanium-selecting tailings of vanadium titano-magnetite - Google Patents
Method for pre-selecting ilmenite from titanium-selecting tailings of vanadium titano-magnetite Download PDFInfo
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 38
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 38
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 32
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 24
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 56
- 239000010936 titanium Substances 0.000 claims abstract description 56
- 238000007885 magnetic separation Methods 0.000 claims abstract description 36
- 239000012141 concentrate Substances 0.000 claims abstract description 32
- 230000002000 scavenging effect Effects 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 238000000227 grinding Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000005188 flotation Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000006148 magnetic separator Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 12
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 12
- 235000010755 mineral Nutrition 0.000 description 9
- 230000005484 gravity Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229910052655 plagioclase feldspar Inorganic materials 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 229910052952 pyrrhotite Inorganic materials 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052963 cobaltite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052954 pentlandite Inorganic materials 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 229910052611 pyroxene Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NMJKIRUDPFBRHW-UHFFFAOYSA-N titanium Chemical compound [Ti].[Ti] NMJKIRUDPFBRHW-UHFFFAOYSA-N 0.000 description 1
- 229910001773 titanium mineral Inorganic materials 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- -1 violarite Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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Abstract
The invention discloses a method for preselecting ilmenite from titanium tailings of vanadium titano-magnetite, relates to the field of mineral separation, and aims to preselecting ilmenite from titanium tailings and reduce TiO in the titanium tailings2And (4) grade. The technical scheme adopted by the invention is as follows: the method for pre-selecting ilmenite from the titanium tailings of the vanadium titano-magnetite comprises the steps of taking the titanium tailings of the vanadium titano-magnetite strong magnetic titanium separation as a raw material, and screening the titanium tailings into coarse-fraction tailings and fine-fraction tailings; grinding the coarse fraction tailings, and then screening to obtain oversize materials and undersize materials; returning the oversize material to grind, mixing the undersize material with the fine-grained tailings, and performing size mixing to prepare ore pulp; carrying out magnetic separation on the ore pulp, and separating the ore pulp into magnetic concentrate and magnetic tailings; scavenging the magnetic tailings, and separating the magnetic tailings into scavenged concentrate and scavenged tailings; will be magneticAnd selecting the concentrate and the scavenging concentrate as mineral processing products, wherein the mineral processing products are raw materials for flotation desulfurization and titanium separation operation. The method is used for recovering the ilmenite from the titanium separation tailings.
Description
Technical Field
The invention relates to the field of mineral separation, in particular to a method for pre-selecting ilmenite from titanium separation tailings of vanadium titano-magnetite high-intensity magnetic titanium separation.
Background
The vanadium titano-magnetite is a multi-element symbiotic iron ore which mainly contains iron, vanadium and titanium elements and contains other useful elements such as cobalt, nickel, chromium, scandium, gallium and the like, and has high comprehensive utilization value. The process for sorting ilmenite in the vanadium titano-magnetite mainly comprises the steps of strong magnetic separation-flotation, strong magnetic separation-gravity separation, gravity separation-flotation, gravity separation-electric separation, and the iron tailings are relatively separated, namely TiO2The recovery rate is 30-55%, and a large amount of titanium resources are lost in titanium dressing tailings.
Vanadium-titanium magnetite in Panxi area of Sichuan is a widely distributed mineral containing iron, vanadium and titanium, and is mainly generated in basic and super-basic immersed ore deposits (magma type iron ore deposits) and characterized by being rich in vanadium and titanium. The main mineral types of the ore mainly comprise titanomagnetite, ilmenite, pyrrhotite, pyrite, pyroxene, plagioclase, olivine, sphene, serpentine and chlorite, and are accompanied by valuable minerals such as pentlandite, violarite, chalcopyrite, cobaltite and the like. The main valuable elements in the ore are iron, titanium and vanadium, wherein iron mainly exists in the form of titanomagnetite, titanium mainly exists in the form of titanomagnetite and ilmenite, and vanadium mainly exists in the form of homogeneous phase in the titanomagnetite. The titanomagnetite and the magnetite have similar properties and strong magnetism, and vanadium is mainly added into the titanomagnetite in a quality in-phase mode, the development and utilization of the vanadium titanomagnetite in the Panxi area all adopt a low-intensity magnetic separation method to recover iron and vanadium in the vanadium titanomagnetite, the processes are all stage grinding stage selection, and only the differences are provided on crushing, grinding, magnetic separation equipment, specific processes, parameters and supporting facilities. Because of its high specific gravity, conductivity and weak magnetism, ilmenite is usually selected by gravity separation, strong magnetic separation, electric separation and dry magnetic separation recovery.
The early ilmenite recycling process flow of the vanadium titano-magnetite in the Panxi area is iron tailing dressing, slag separation, weak magnetic iron removal, hydraulic classification (coarse and fine separation is realized), spiral concentrating machine and table reselection, gravity concentrate sulfide flotation, desulfurized tailings (low-sulfur gravity concentrate), weak magnetic iron removal, drying, electric separation and ilmenite concentrate. Several improvements are made, and the representative titanium-selecting process is iron-tailings separation-slag-weak magnetic separationIron removal, hydraulic classification (coarse and fine separation is realized), vertical ring pulsation high gradient magnetic separator strong magnetic separation, magnetic separation concentrate flotation sulfide, desulfurization tailings (low-sulfur strong magnetic concentrate) flotation titanium-titanium concentrate. The strong magnetic separation flow generally comprises a first-stage roughing step, a first-stage concentrating step and a first-stage scavenging step, wherein the concentrating tailings and the scavenging tailings are combined and discharged into a tailing pond, and the concentrating concentrate and the scavenging concentrate are combined and enter the flotation sulfide. Scavenging tailings TiO of strong magnetic separation2The grade is about 4 percent, and the tailing TiO is selected2TiO of titanium tailings with grade of about 7 percent and flotation2The grade is about 4 percent, so that the titanium tailings TiO are discharged into a tailing pond to be selected2The grade is about 6%.
The strong magnetic separation equipment for separating ilmenite from vanadium titano-magnetite in the Panxi region is mainly a vertical ring pulse high gradient magnetic separator, and has the main advantages of large treatment capacity, good separation effect on coarse-grained and medium-grained ilmenite and poor magnetic separation effect on ultra-fine-grained (-38 mu m), so that a large amount of ilmenite resources are lost in tailings. If an effective method for recovering ilmenite from titanium tailings of vanadium titano-magnetite can be found, TiO in the titanium tailings can be reduced2The grade can obviously reduce TiO in the tailings in storage2The grade is improved, thereby effectively improving the comprehensive recovery rate of the titanium resource in the vanadium titano-magnetite.
Disclosure of Invention
The invention provides a method for preselecting ilmenite from titanium tailings of vanadium titano-magnetite, and aims to preselecting ilmenite from titanium tailings and reduce TiO in the titanium tailings2The grade and the recovery rate of titanium resources in the vanadium titano-magnetite are improved.
The technical scheme adopted by the invention is as follows: a method for pre-selecting ilmenite from titanium-selecting tailings of vanadium titano-magnetite comprises the following steps:
s1, screening the titanium tailings into coarse-fraction tailings and fine-fraction tailings by taking the titanium tailings of the vanadium titano-magnetite strong-magnetic titanium separation as a raw material.
S2, grinding the coarse fraction tailings, and then screening to obtain oversize materials and undersize materials.
Wherein the sieving particle sizes of S1 and S2 are both 0.10 mm. Specifically, S1 and S2 are respectively sieved by a high-frequency vibrating screen, and the vibration frequency of the high-frequency vibrating screen is 2850 times/min.
Wherein, S2 adopts a vertical spiral stirring ore mill to grind. Specifically, the ore grinding equipment is an LJM-50 type vertical spiral stirring ore grinding machine, the ball loading amount is 40kg to 40kg of Phi 15mm to Phi 20mm, the ore grinding linear speed is 1.8m/s, the ore grinding concentration is 70%, and the ore feeding and discharging speed is 30 kg/min.
And S3, returning the oversize material to S2 for grinding, mixing the undersize material and the fine-fraction tailings, and performing size mixing to obtain ore pulp.
S4, carrying out magnetic separation on the ore pulp to obtain TiO2High grade magnetic concentrate and TiO2Magnetic separation tailings with low grade; and scavenging the magnetic separation tailings, and separating the magnetic separation tailings into scavenged concentrate and scavenged tailings.
Wherein, the equipment of magnetic separation is belt magnet separator, and the magnetic separation parameter is: the magnetic field intensity is 6000Oe, the ore feeding pulp concentration is 15-20%, the ore feeding speed is 60kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 100L/h.
Wherein, the equipment of scavenging is belt magnet separator, and the scavenging parameter is: the magnetic field intensity is 8000Oe, the ore pulp feeding concentration is 15-20%, the ore feeding speed is 30-35 kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 50L/h.
And S5, taking the magnetic concentrate and the scavenging concentrate as mineral separation products, wherein the mineral separation products are raw materials for flotation desulfurization and titanium separation operation.
The invention has the beneficial effects that: realizes the pre-selection of ilmenite from the titanium tailings of the vanadium titano-magnetite, can effectively recover part of ilmenite in the titanium tailings, and obviously reduces TiO of scavenged tailings as warehousing tailings2Grade and great economic benefit. The invention also sets the parameters of screening, ore grinding, magnetic separation and scavenging, so that the titanium tailings can be pre-separated better, and the comprehensive recovery rate of titanium resources in the vanadium titano-magnetite can be effectively improved.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in figure 1, the method for pre-selecting ilmenite from titanium tailings of vanadium titano-magnetite, which is disclosed by the invention, takes the titanium tailings of vanadium titano-magnetite strong magnetic titanium selection as a raw material, has the concentration of 15-20%, and comprises the following steps:
s1, screening the titanium separation tailings raw material into coarse-fraction tailings and fine-fraction tailings, for example, screening by a high-frequency vibration screen, wherein the purpose of screening is to realize more screens and less grinding of the raw material. The screening size is suitable for subsequent magnetic separation and scavenging, for example, the screening size is 0.10mm, namely the particle size of the fine fraction tailings is less than 0.10mm, and the particle size of the coarse fraction tailings is greater than or equal to 0.10 mm.
S2, grinding the coarse fraction tailings, and then screening to obtain oversize materials and undersize materials. For example, the ore grinding equipment is an LJM-50 type vertical spiral stirring ore mill, the ball loading amount is 40kg of each of phi 15mm and phi 20mm, the ore grinding line speed is 1.8m/s, the ore grinding concentration is 70%, and the ore feeding and discharging speed is 30 kg/min. The screening may be performed by using the same screening apparatus as that of S1 described above, for example, S1 and S2 may be performed by using high frequency vibration screens, and the vibration frequency of each high frequency vibration screen is set to 2850 times/min.
And S3, returning the oversize materials to the S2 for grinding, mixing the undersize materials with the fine-grained tailings, and performing size mixing to obtain ore pulp. For example, the concentration of coarse fraction tailings and oversize materials is 70-80%, and the coarse fraction tailings and the oversize materials are respectively conveyed to an LJM-50 type vertical spiral stirring ore mill in S2 by an 1/2 vertical sand pump to be ground; and respectively conveying the fine-fraction tailings and undersize materials to a stirring barrel by using an 1/2 vertical sand pump for size mixing. The target concentration of the pulp conditioning is based on the subsequent magnetic separation, for example, the mixing tank is a 20L mixing tank, and the pulp conditioning concentration is 20%.
S4, carrying out magnetic separation on the ore pulp to obtain TiO2High grade magnetic concentrate and TiO2Magnetic separation tailings with low grade; and scavenging the magnetic separation tailings, and separating the magnetic separation tailings into scavenged concentrate and scavenged tailings. The magnetic separation and scavenging equipment is a belt magnetic separator, for example, the magnetic separation parameters are as follows: the magnetic field intensity is 6000Oe, the ore pulp feeding concentration is 15-20%, the ore feeding speed is 60kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 100L/h. The scavenging parameters are as follows:the magnetic field intensity is 8000Oe, the ore pulp feeding concentration is 15-20%, the ore feeding speed is 30-35 kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 50L/h.
And S5, taking the magnetic separation concentrate and the scavenging concentrate as mineral processing products, wherein the mineral processing products are raw materials for flotation desulfurization and titanium separation, and the scavenging tailings are conveyed to a tailing pond for stockpiling through a pump and a pipeline.
The present invention will be described in detail with reference to examples.
The titanium tailings are strong magnetic concentrated tailings of titanium separation of vanadium titano-magnetite, wherein TiO2The grade was 5.87%, and the TFe content was 11.88%. Titanium minerals in the titanium tailings are mainly ilmenite, and a small amount of sphene can be distributed; the iron ore is mainly titanomagnetite, and occasionally magnetite and limonite; metal sulfides are mainly pyrrhotite and pyrite; the gangue minerals with higher content are plagioclase, titanpside and chlorite, and are titanium amphibole for the next time; other trace minerals are mica and serpentine. The concentration of the titanium tailings is 17%, the titanium tailings are classified by a high-frequency vibrating screen and are screened into coarse-fraction tailings and fine-fraction tailings, the vibrating frequency is 2850 times/min, and the screening granularity is 0.10 mm. And conveying the coarse fraction tailings to an LJM-50 type vertical spiral stirring ore mill by using an 1/2 vertical sand pump, grinding, sieving, and returning oversize materials to grind. And (3) respectively conveying the undersize materials and the fine-fraction tailings to a stirring barrel by using an 1/2 vertical sand pump for size mixing to obtain ore pulp with the concentration of 20%, wherein the ore pulp is used as a magnetic separation raw material.
The magnetic separation equipment is a belt magnetic separator with the bandwidth of 1m, the magnetic field intensity is 6000Oe, the ore feeding pulp concentration is 16%, the ore feeding speed is 60kg/h, the belt speed is 0.2m/s, and the belt washing water volume is 100L/h. Magnetic separation to obtain TiO2High grade magnetic concentrate and TiO2And (4) magnetic separation tailings with low grade. The yield of the magnetic concentrate is 17.24 percent, and the yield of the TiO concentrate is2The grade was 17.23%. And (4) scavenging the magnetic tailings, and separating the magnetic tailings into scavenged concentrate and scavenged tailings. The scavenging equipment is a belt magnetic separator with the bandwidth of 600mm, the magnetic field intensity is 8000Oe, the ore pulp feeding concentration is 14%, the ore feeding speed is 50kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 100L/h. The removal rate is 73.66 percent relative to the raw ore through scavenging and TiO removal2The grade is 2.07%The yield of the scavenged tailings is 9.10 percent, and TiO is obtained2The grade of the scavenging concentrate is 15.1 percent, and the TFe grade of the scavenging concentrate is 28.31 percent. The magnetic concentrate and the scavenging concentrate are combined to be used as a beneficiation product, the yield of the beneficiation product is 26.34 percent, and the TiO is2The grade was 16.49%.
Claims (7)
1. The method for pre-selecting ilmenite from titanium-selecting tailings of vanadium titano-magnetite is characterized by comprising the following steps: the method comprises the following steps:
s1, screening the titanium tailings into coarse-fraction tailings and fine-fraction tailings by taking the titanium tailings of the vanadium titano-magnetite high-intensity magnetic separation of titanium as a raw material;
s2, grinding the coarse fraction tailings, and then screening to obtain oversize materials and undersize materials;
s3, returning the oversize material to S2 for grinding, mixing the undersize material and the fine-grained tailings, and performing size mixing to obtain ore pulp;
s4, carrying out magnetic separation on the ore pulp to obtain TiO2High grade magnetic concentrate and TiO2Magnetic separation tailings with low grade; scavenging the magnetic tailings, and separating the magnetic tailings into scavenged concentrate and scavenged tailings;
and S5, taking the magnetic concentrate and the scavenging concentrate as mineral separation products, wherein the mineral separation products are raw materials for flotation desulfurization and titanium separation operation.
2. The process of preselecting ilmenite from titanium tailings of vanadium titano-magnetite as claimed in claim 1, wherein: the sieve sizes of S1 and S2 were both 0.10 mm.
3. A process according to claim 2 for the pre-selection of ilmenite from the titanium tailings of a vanadium titano-magnetite, wherein: and S1 and S2 are respectively sieved by a high-frequency vibrating screen, and the vibration frequency of the high-frequency vibrating screen is 2850 times/min.
4. The process of preselecting ilmenite from titanium tailings of vanadium titano-magnetite as claimed in claim 1, wherein: s2 grinding the ore by using a vertical spiral stirring ore grinder.
5. The process of preselecting ilmenite from the titanium tailings of vanadium titano-magnetite as claimed in claim 4, wherein: the ore grinding equipment is an LJM-50 type vertical spiral stirring ore grinding machine, the ball loading amount is 40kg to 40kg of Phi 15mm to Phi 20mm, the ore grinding linear speed is 1.8m/s, the ore grinding concentration is 70 percent, and the ore feeding and discharging speed is 30 kg/min.
6. The method for pre-selecting ilmenite from the titanium tailings of vanadium titano-magnetite as claimed in any one of claims 1 to 5, characterized in that: in S4, the magnetic separation equipment is a belt magnetic separator, and the magnetic separation parameters are as follows: the magnetic field intensity is 6000Oe, the ore feeding pulp concentration is 15-20%, the ore feeding speed is 60kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 100L/h.
7. The method for pre-selecting ilmenite from the titanium tailings of vanadium titano-magnetite as claimed in any one of claims 1 to 5, characterized in that: in S4, the scavenging equipment is a belt magnetic separator, and the scavenging parameters are as follows: the magnetic field intensity is 8000Oe, the ore pulp feeding concentration is 15-20%, the ore feeding speed is 30-35 kg/h, the belt speed is 0.2m/s, and the belt washing water amount is 50L/h.
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| CN115365139A (en) * | 2022-07-12 | 2022-11-22 | 昆明理工大学 | High-gradient strong magnetic separation method for recovering fine-grain ilmenite from low-grade titanium tailings |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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