CN116351575B - Beneficiation process for silicon reduction and quality improvement of ilmenite - Google Patents
Beneficiation process for silicon reduction and quality improvement of ilmenite Download PDFInfo
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- CN116351575B CN116351575B CN202310188223.4A CN202310188223A CN116351575B CN 116351575 B CN116351575 B CN 116351575B CN 202310188223 A CN202310188223 A CN 202310188223A CN 116351575 B CN116351575 B CN 116351575B
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- ilmenite
- stirring
- titanium concentrate
- roughing
- flotation
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- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 25
- 239000010703 silicon Substances 0.000 title claims abstract description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 17
- 230000009467 reduction Effects 0.000 title claims description 5
- 230000006872 improvement Effects 0.000 title claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000010936 titanium Substances 0.000 claims abstract description 58
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 58
- 239000012141 concentrate Substances 0.000 claims abstract description 48
- 238000005188 flotation Methods 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 32
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 12
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 6
- 238000004537 pulping Methods 0.000 claims abstract description 6
- 230000004913 activation Effects 0.000 claims abstract description 5
- -1 alkyl guanidine sulfate Chemical compound 0.000 claims description 12
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- YWFWDNVOPHGWMX-UHFFFAOYSA-N n,n-dimethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)C YWFWDNVOPHGWMX-UHFFFAOYSA-N 0.000 claims description 5
- SADHVOSOZBAAGL-UHFFFAOYSA-N 3-(trifluoromethoxy)aniline Chemical compound NC1=CC=CC(OC(F)(F)F)=C1 SADHVOSOZBAAGL-UHFFFAOYSA-N 0.000 claims description 3
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000377 silicon dioxide Substances 0.000 abstract description 9
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 9
- 229910052681 coesite Inorganic materials 0.000 abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 15
- 239000011707 mineral Substances 0.000 description 15
- 235000010755 mineral Nutrition 0.000 description 15
- 238000012216 screening Methods 0.000 description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 238000010494 dissociation reaction Methods 0.000 description 7
- 230000005593 dissociations Effects 0.000 description 7
- 239000000178 monomer Substances 0.000 description 6
- 229910001919 chlorite Inorganic materials 0.000 description 5
- 229910052619 chlorite group Inorganic materials 0.000 description 5
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 5
- 238000007885 magnetic separation Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052604 silicate mineral Inorganic materials 0.000 description 4
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- VFFDVELHRCMPLY-UHFFFAOYSA-N dimethyldodecyl amine Natural products CC(C)CCCCCCCCCCCN VFFDVELHRCMPLY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052840 fayalite Inorganic materials 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 229910052611 pyroxene Inorganic materials 0.000 description 2
- 229910052642 spodumene Inorganic materials 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- NEAQRZUHTPSBBM-UHFFFAOYSA-N 2-hydroxy-3,3-dimethyl-7-nitro-4h-isoquinolin-1-one Chemical compound C1=C([N+]([O-])=O)C=C2C(=O)N(O)C(C)(C)CC2=C1 NEAQRZUHTPSBBM-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000907663 Siproeta stelenes Species 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- LAZOHFXCELVBBV-UHFFFAOYSA-N [Mg].[Ca].[Si] Chemical compound [Mg].[Ca].[Si] LAZOHFXCELVBBV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- NWXHSRDXUJENGJ-UHFFFAOYSA-N calcium;magnesium;dioxido(oxo)silane Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O NWXHSRDXUJENGJ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052637 diopside Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
Classifications
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of ilmenite beneficiation, in particular to a beneficiation process for reducing silicon and improving quality of ilmenite, which comprises the following steps of S1: adding oxalic acid into ilmenite pulp with fineness of 0.075mm accounting for 70% and ore feeding concentration of 40%, stirring and pulping with the mixed material for 3min, adding quicklime with the adding amount of 100-200 g/t, and stirring for 3min to complete activation; s2: adding a first collector into the flotation ore pulp, wherein the addition amount is 150-200 g/t, stirring for 4min, then adding 60g/t of foaming agent 3# oil, stirring for 1min, carrying out air inflation for roughing, wherein the roughing time is 4min, the linear speed of a flotation machine is 6.5-6.8m/s, the gangue silicate phase is floated out and enters a foam product, and coarse titanium concentrate is obtained in a roughing tank; the invention provides a beneficiation process for reducing silicon and improving quality of ilmenite, which aims to solve the problems that in the prior art, the silicon content in the titanium concentrate is too high, and the titanium concentrate with the SiO2 content less than 1% cannot be obtained by the gravity separation of a spiral chute and a centrifugal concentrator.
Description
Technical Field
The invention belongs to the technical field of ilmenite beneficiation, and in particular relates to a beneficiation process for reducing silicon and improving quality of ilmenite.
Background
The titanium resources in China are rich, but more than 95% of the resources are low-quality symbiotic rock ores, wherein the titanium resource reserves in Panxi area account for more than 90% of the titanium resources in China, but the silicon-calcium-magnesium impurity content of the titanium resources is as high as more than 10%, and the titanium resources are difficult to be directly used in the high-end titanium industry; through serious analysis of constraint factors influencing the preparation of titanium-rich chloride materials from Panxi ore, the fact that silicon dioxide in Panxi ore is high is found to be a 'core' problem causing difficult upgrading of Panxi titanium slag, and for this reason, conventional low-cost ore dressing technology needs to be developed, silicon dioxide in Panxi titanium concentrate is removed in the ore dressing process, and technical difficulty and economic cost of subsequent chemical impurity removal are reduced.
The research results of mineralogy show that the metal minerals in the titanium concentrate are mainly ilmenite, and secondly titanomagnetite, pyrrhotite and the like, the gangue minerals mainly comprise silicate minerals such as chlorite, spodumene, medium-pull feldspar, forsterite, fayalite, sphene and the like, more than 98% of titanium elements exist in the form of ilmenite, the dissociation degree of monomers is more than 96%, and the dissociation of monomers is basically realized; the gangue minerals rich in three impurity elements of calcium, silicon and magnesium are mainly silicate minerals such as chlorite, pyroxene and sphene, the gangue minerals forming inclusion with ilmenite are mainly chlorite, sphene, malachite and fayalite, some of the gangue minerals are separated out along parting of ilmenite, some of the gangue minerals are meshed and inserted in dissociation or parting of ilmenite, the crystal form is irregular, the granularity also belongs to a fine grade, and certain separation difficulty is achieved.
Currently, the existing technology of the beneficiation process of titanium concentrate mainly comprises:
1. The invention discloses a beneficiation method of high-grade titanium concentrate, which is disclosed in Chinese patent document with publication date of 2020, 4 and 10 and patent number of CN110976072A, and comprises the following process steps: a. removing impurities and carrying out high-gradient strong magnetic separation on the raw ore pulp to obtain strong magnetic separation concentrate; b. classifying and screening the strong magnetic concentrate, and carrying out demagnetizing treatment on the obtained fine ore particles to obtain demagnetized ore; c. carrying out gravity separation treatment on the demagnetized ore to obtain titanium concentrate with the titanium grade more than or equal to 42 wt%; d. and carrying out strong magnetic separation on the titanium concentrate to obtain high-grade titanium concentrate with the titanium grade being more than or equal to 45 wt%. The beneficiation method of the titanium concentrate obtained by the invention omits a flotation process, reduces environmental pollution sources, ensures that all indexes of the finally obtained high-grade titanium concentrate can meet the high requirements of deep processing, and realizes the purpose of stably and continuously producing fine-ground, low-sulfur and high-grade titanium concentrate.
2. The invention discloses an ilmenite flotation collector, in particular an ilmenite flotation collector and a preparation method thereof, and belongs to the technical field of mineral flotation collection, wherein the publication date is 2021, 3, 27 and the patent number is CN 113000221A. Ilmenite collecting and flotation reagent, wherein the raw materials comprise Izod T, sodium oleate, terpineol oil, kerosene and water glass; the preparation method comprises the following steps: heating sodium oleate, adding and stirring Izod T, adding and stirring pine oil and kerosene, and finally adding and stirring water glass uniformly to prepare an ilmenite flotation collector; the ilmenite flotation collector has the advantages of effectively guaranteeing the beneficiation effect of ilmenite, simultaneously being low in cost, safe and environment-friendly, and being capable of effectively improving the quality grade of ilmenite after the components are cooperated.
3. The invention discloses a mineral separation method for producing titanium concentrate by using ilmenite, which belongs to the technical field of mineral separation, and relates to a mineral separation method for producing titanium concentrate by using ilmenite, and the publication date is 2022, 3, 22 and the Chinese patent literature of patent No. CN 111729754B. The invention comprises the following steps: the method comprises the steps of strong magnetic roughing, ore grinding grading, strong magnetic selecting and floatation, wherein ferrotitanium concentrate after the strong magnetic roughing is used as raw ore, the raw ore is graded through a screening machine, undersize enters the strong magnetic selecting and grading, oversize is returned to a ball mill for ball milling, the material after ball milling is conveyed to a feeding end of the screening machine to form a closed cycle of ore grinding grading, a screen of the screening machine is sequentially provided with an upper screening area and a lower screening area along the inclined direction of the screen, the upper end of the upper screening area is the feeding end, the upper screening area adopts a screen with the screening aperture of 0.15mm, and the lower screening area adopts a screen with the screening aperture of 0.18 mm. The strong magnetic roughing concentrate is classified by adopting the combined screen of the upper 0.15mm screen and the lower 0.18mm screen, so that the screening efficiency can be improved and the production cost can be reduced.
Although the above patent technology can successfully select high-grade titanium concentrate, the problem of too high silicon content in the titanium concentrate is not solved, and simultaneously, the titanium concentrate with SiO2 content less than 1% cannot be obtained by the gravity separation of a spiral chute and a centrifugal concentrator, so that a technology for separating silicate minerals from ilmenite, particularly calcium-containing silicate, needs to be found.
Therefore, the invention provides a beneficiation process for reducing silicon and improving quality of ilmenite.
Disclosure of Invention
In order to make up the deficiency of the prior art, solve the problems that the silicon content in the titanium concentrate is too high and the titanium concentrate with SiO2 content less than 1% can not be obtained by the gravity separation of the spiral chute and the centrifugal concentrator in the prior art, the invention provides a process for reducing silicon and improving quality of ilmenite.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a beneficiation process for silicon reduction and quality improvement of ilmenite, which is as follows:
S1: adding oxalic acid into ilmenite pulp with fineness of 0.075mm accounting for 70% and ore feeding concentration of 40%, stirring and pulping with the mixed material for 3min, adding quicklime with the adding amount of 100-200 g/t, and stirring for 3min to complete activation, thus obtaining flotation ore pulp;
S2: adding a first collector into the flotation ore pulp, wherein the addition amount is 150-200 g/t, stirring for 4min, then adding 60g/t of foaming agent 3# oil, stirring for 1min, carrying out air inflation for roughing, wherein the roughing time is 4min, the linear speed of a flotation machine is 6.5-6.8m/s, the gangue silicate phase is floated out and enters a foam product, and coarse titanium concentrate is obtained in a roughing tank;
S3: and (2) adding a second collecting agent into the desilication coarse titanium concentrate product in the tank after the step (S2), wherein the adding amount is 80-100 g/t, stirring for 4min, adding foaming agent 3# oil 20g/t, aerating for concentration, and the concentration time is 3min, wherein the linear speed of a flotation machine is 6.5-6.8m/S, so that the low-silicon titanium concentrate is finally obtained, and the effective separation of ilmenite and siliceous gangue is realized.
Preferably, the first collector consists of cetyltrimethylammonium bromide, N-dimethyldodecyl amine and alkyl guanidine sulfate, and the mass ratio of the cetyltrimethylammonium bromide to the N, N-dimethyldodecyl amine to the alkyl guanidine sulfate is 2:2:1.
Preferably, the second collector consists of cetyltrimethylammonium bromide, N dimethyl dodecyl amine and alkyl guanidine sulfate in a mass ratio of 1:1:1.
Preferably, the alkyl guanidine sulfate is prepared by reacting O-methyl isourea sulfate and dodecyl amine as reactants with ethanol and water as solvents at the constant temperature of 50 ℃ for 4 hours and then recrystallizing.
The beneficial effects of the invention are as follows:
1. compared with the existing common methods of direct flotation, gravity separation, magnetic separation and the like, the invention has the advantages that: the efficient collector with strong interaction with siliceous gangue is selected, so that the ilmenite and the siliceous gangue are effectively separated, the gravity separation and the magnetic separation are not carried out, a large amount of flotation agents such as sulfuric acid, sodium silicate, sodium oleate, hydroxamic acid and the like are not utilized, and the environmental pollution is reduced.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a beneficiation process for silica-reduction upgrading ilmenite;
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1, a beneficiation process for silicon reduction and upgrading of ilmenite, the beneficiation process is as follows:
S1: adding oxalic acid into ilmenite pulp with fineness of 0.075mm accounting for 70% and ore feeding concentration of 40%, stirring and pulping with the mixed material for 3min, adding quicklime with the adding amount of 100-200 g/t, and stirring for 3min to complete activation, thus obtaining flotation ore pulp;
S2: adding a first collector into the flotation ore pulp, wherein the addition amount is 150-200 g/t, stirring for 4min, then adding 60g/t of foaming agent 3# oil, stirring for 1min, carrying out air inflation for roughing, wherein the roughing time is 4min, the linear speed of a flotation machine is 6.5-6.8m/s, the gangue silicate phase is floated out and enters a foam product, and coarse titanium concentrate is obtained in a roughing tank;
S3: and (2) adding a second collecting agent into the desilication coarse titanium concentrate product in the tank after the step (S2), wherein the adding amount is 80-100 g/t, stirring for 4min, adding foaming agent 3# oil 20g/t, aerating for concentration, and the concentration time is 3min, wherein the linear speed of a flotation machine is 6.5-6.8m/S, so that the low-silicon titanium concentrate is finally obtained, and the effective separation of ilmenite and siliceous gangue is realized.
Preferably, the first collector consists of cetyltrimethylammonium bromide, N-dimethyldodecyl amine and alkyl guanidine sulfate, and the mass ratio of the cetyltrimethylammonium bromide to the N, N-dimethyldodecyl amine to the alkyl guanidine sulfate is 2:2:1.
Preferably, the second collector consists of cetyltrimethylammonium bromide, N dimethyl dodecyl amine and alkyl guanidine sulfate in a mass ratio of 1:1:1.
Preferably, the alkyl guanidine sulfate is prepared by reacting O-methyl isourea sulfate and dodecyl amine as reactants with ethanol and water as solvents at the constant temperature of 50 ℃ for 4 hours and then recrystallizing.
Embodiment one: the mineral sample is from a company of Panzhihua, the grade of TiO2 of the mineral sample is 45.87%, and the grade of SiO2 is 2.48%; the particle size distribution of the raw ore is mainly concentrated in-100+325 meshes, siO2 and TiO2 are concentrated in-100+325 meshes, the particle size interval is suitable for flotation, and as the silicate of each particle size exceeds the requirement of the target titanium concentrate (less than 1 percent), the titanium concentrate containing SiO2<1 percent can not be obtained only by the particle size classification; the silicon element is mainly endowed in chlorite, diopside, iron aluminum garnet, amphibole, sphene and spodumene, and the dissociation degree of the monomer of the ilmenite is 96.51%, so that the dissociation of the monomer is basically realized; there is a possibility of flotation to remove siliceous gangue.
The desilication treatment is carried out by adopting the method for flotation and desilication of the titanium concentrate, which comprises the following steps:
Adding oxalic acid into ilmenite pulp with the fineness of 0.075mm accounting for 70% and the ore feeding concentration of 40%, stirring and pulping the mixture for 3min, adding quicklime with the adding amount of 150g/t, and stirring for 3min to complete activation;
Adding a first collector into the flotation pulp, wherein the addition amount is 180g/t, and stirring for 4 min; 60g/t of foaming agent 3# oil is added, stirring is carried out for 1min, air inflation is carried out for roughing, roughing time is 4min, the linear speed of a flotation machine is 6.5m/s, gangue silicate phase is floated out and enters a foam product, and rough titanium concentrate is obtained in a groove after roughing;
The second collecting agent is added into the desilication rough titanium concentrate product in the tank, the adding amount is 80/t, stirring is carried out for 4min, foaming agent 3# oil 20g/t is added, aeration is carried out for concentration, the concentration time is 3min, the linear speed of a flotation machine is 6.5m/s, finally the low-silicon titanium concentrate is obtained, the silicon content in the titanium concentrate is 0.72%, the quality standard is reached, the titanium dioxide content is 49.2%, the titanium recovery rate is 71.3%, and the effective separation of ilmenite and siliceous gangue is realized.
Embodiment two:
The mineral sample is from Wenchang corporation, the grade of TiO2 of the mineral sample is 41.32%, and the grade of SiO2 is 3.26%; since each grade of silicate exceeds the requirement of target titanium concentrate (less than 1%), titanium concentrate containing SiO2<1% cannot be obtained by only size classification. The ilmenite has a monomer dissociation degree of 95.82%, and basically realizes the monomer dissociation; gangue minerals rich in Ca, si and Mg are mainly silicate minerals such as chlorite, pyroxene and sphene, so that the siliceous gangue can be removed by floatation.
The desilication treatment is carried out by adopting the method for flotation and desilication of the titanium concentrate, which comprises the following steps:
Adding 100g/t oxalic acid into ilmenite pulp with ore fineness of-0.075 mm and ore concentration of 40%, stirring and pulping for 3min, adding 200g/t quicklime, and stirring for 3min to activate;
Adding a first collector into the flotation pulp, wherein the addition amount is 250g/t, and stirring for 4 min; 60g/t of foaming agent 3# oil is added, stirring is carried out for 1min, air inflation is carried out for roughing, roughing time is 4min, the linear speed of a flotation machine is 6.8m/s, gangue silicate phase is floated out and enters a foam product, and rough titanium concentrate is obtained in a groove after roughing;
Adding a second collecting agent into the desilication coarse titanium concentrate product in the tank, wherein the adding amount is 120/t, stirring is carried out for 4min, foaming agent 3# oil is added for 20g/t, aeration is carried out for concentration, the concentration time is 3min, the linear speed of a flotation machine is 6.8m/s, and finally the low-silicon titanium concentrate is obtained, the silicon content in the titanium concentrate is 0.95%, the quality standard is reached, the titanium dioxide content is 45.1%, the titanium recovery rate is 70.6%, and the effective separation of ilmenite and siliceous gangue is realized.
In conclusion, the method has the advantages of high reverse flotation efficiency of the combined reagent, small environmental pollution, low flotation dosage, simple process flow and easiness in implementation. When the silicon content in the ore feeding is 2.3%, the silicon content of the titanium concentrate can be reduced to about 0.7%, and the titanium recovery rate is more than 70%.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The beneficiation process for reducing silicon and improving quality of ilmenite is characterized by comprising the following steps of:
S1: adding oxalic acid into ilmenite pulp with fineness of 0.075mm accounting for 70% and ore feeding concentration of 40%, stirring and pulping with the mixed material for 3min, adding quicklime with the adding amount of 100-200 g/t, and stirring for 3min to complete activation, thus obtaining flotation ore pulp;
S2: adding a first collector into the flotation ore pulp, wherein the addition amount is 150-200 g/t, stirring for 4min, then adding 60g/t of foaming agent 3# oil, stirring for 1min, carrying out air inflation for roughing, wherein the roughing time is 4min, the linear speed of a flotation machine is 6.5-6.8m/s, the gangue silicate phase is floated out and enters a foam product, and coarse titanium concentrate is obtained in a roughing tank;
S3: adding a second collecting agent into the desilication coarse titanium concentrate product in the tank after the step S2, wherein the adding amount is 80-100 g/t, stirring for 4min, adding foaming agent 3# oil 20g/t, aerating for concentration for 3min, and the linear speed of a flotation machine is 6.5-6.8m/S, so that low-silicon titanium concentrate is finally obtained, and the effective separation of ilmenite and siliceous gangue is realized;
The first collector consists of cetyltrimethylammonium bromide, N-dimethyl dodecyl amine and alkyl guanidine sulfate, and the mass ratio of the cetyltrimethylammonium bromide to the N, N-dimethyl dodecyl amine to the alkyl guanidine sulfate is 2:2:1;
The second collector consists of cetyltrimethylammonium bromide, N-dimethyl dodecyl amine and alkyl guanidine sulfate in a mass ratio of 1:1:1.
2. The beneficiation process for silicon reduction and quality improvement of ilmenite according to claim 1, wherein the alkyl guanidine sulfate is obtained by reacting O-methyl isourea sulfate and dodecyl amine as reactants with ethanol and water as solvents, and then recrystallizing after reacting for 4 hours at a constant temperature of 50 ℃.
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