CN117299339A - Efficient beneficiation method for comprehensively recycling fluorite in high-fluorite-content flotation tailings - Google Patents
Efficient beneficiation method for comprehensively recycling fluorite in high-fluorite-content flotation tailings Download PDFInfo
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- CN117299339A CN117299339A CN202311070162.8A CN202311070162A CN117299339A CN 117299339 A CN117299339 A CN 117299339A CN 202311070162 A CN202311070162 A CN 202311070162A CN 117299339 A CN117299339 A CN 117299339A
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- fluorite
- concentrate
- concentration
- flotation tailings
- flotation
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- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 180
- 239000010436 fluorite Substances 0.000 title claims abstract description 178
- 238000005188 flotation Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000004064 recycling Methods 0.000 title claims description 8
- 239000012141 concentrate Substances 0.000 claims abstract description 114
- 239000003112 inhibitor Substances 0.000 claims abstract description 48
- 238000000227 grinding Methods 0.000 claims abstract description 39
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 238000007885 magnetic separation Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 49
- 235000019353 potassium silicate Nutrition 0.000 claims description 41
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 30
- 239000011707 mineral Substances 0.000 claims description 30
- 235000010755 mineral Nutrition 0.000 claims description 30
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- 238000000926 separation method Methods 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- 229910021532 Calcite Inorganic materials 0.000 claims description 19
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 15
- 239000012190 activator Substances 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 239000002223 garnet Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 8
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 7
- 238000010494 dissociation reaction Methods 0.000 claims description 7
- 230000005593 dissociations Effects 0.000 claims description 7
- 239000006148 magnetic separator Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 5
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 5
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 5
- 239000005642 Oleic acid Substances 0.000 claims description 5
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 5
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 5
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 5
- 239000012188 paraffin wax Substances 0.000 claims description 5
- 239000000344 soap Substances 0.000 claims description 5
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- 239000004375 Dextrin Substances 0.000 claims description 4
- 229920001353 Dextrin Polymers 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 235000019425 dextrin Nutrition 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 4
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- 239000001648 tannin Substances 0.000 claims description 4
- 229920001864 tannin Polymers 0.000 claims description 4
- 235000018553 tannin Nutrition 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- XGRSAFKZAGGXJV-UHFFFAOYSA-N 3-azaniumyl-3-cyclohexylpropanoate Chemical compound OC(=O)CC(N)C1CCCCC1 XGRSAFKZAGGXJV-UHFFFAOYSA-N 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 239000006246 high-intensity magnetic separator Substances 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 108010064470 polyaspartate Proteins 0.000 claims description 3
- 229920001444 polymaleic acid Polymers 0.000 claims description 3
- 229910052604 silicate mineral Inorganic materials 0.000 claims description 3
- 239000011775 sodium fluoride Substances 0.000 claims description 3
- 235000013024 sodium fluoride Nutrition 0.000 claims description 3
- 229960004711 sodium monofluorophosphate Drugs 0.000 claims description 3
- LDMOEFOXLIZJOW-UHFFFAOYSA-N 1-dodecanesulfonic acid Chemical compound CCCCCCCCCCCCS(O)(=O)=O LDMOEFOXLIZJOW-UHFFFAOYSA-N 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 235000011167 hydrochloric acid Nutrition 0.000 claims description 2
- 150000004668 long chain fatty acids Chemical class 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000003784 tall oil Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims 1
- 238000007127 saponification reaction Methods 0.000 claims 1
- 229910004261 CaF 2 Inorganic materials 0.000 abstract description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 230000002000 scavenging effect Effects 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010433 feldspar Substances 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000011511 Diospyros Nutrition 0.000 description 3
- 244000236655 Diospyros kaki Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 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
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 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
- 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
-
- 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
- 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
- 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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of mine tailing resource recovery, and discloses a high-efficiency beneficiation method for comprehensively recovering fluorite in flotation tailings, which comprises the following steps: classifying the flotation tailings, grinding, preselecting tailings, concentrating and dehydrating ore pulp, adding an activating agent, a regulator and a collecting agent for fluorite flotation roughing, adding an inhibitor into the obtained fluorite rough concentrate for three-stage concentration to obtain fluorite concentrate, concentration tailings and concentration middlings, and returning the concentration middlings to the previous concentration operation;and (3) carrying out strong magnetic separation to remove impurities from fluorite concentrate obtained in the last concentration, wherein a non-magnetic product is the fluorite concentrate, and returning the concentrated and dehydrated fluorite concentrate to the ore grinding section for fine grinding and re-concentration. The method can obtain fluorite concentrate grade CaF 2 More than or equal to 95 percent, and the recovery rate CaF 2 More than or equal to 83 percent, wherein the recovery rate CaF of fluorite flotation operation 2 More than or equal to 90 percent. The invention efficiently realizes the comprehensive recovery of the fluorite in the flotation tailings, and provides a new way and thought for the comprehensive utilization of the fluorite tailing resources of the same type.
Description
Technical Field
The invention belongs to the technical field of mine tailing resource recovery, and particularly relates to a high-efficiency beneficiation method for comprehensively recovering fluorite in flotation tailings with high fluorite content.
Background
In the existing flotation tailings discharged from the polymetallic mill, the mass content of fluorite is possibly higher (for example, 20% -30%), and the fluorite is limited by the existing fluorite beneficiation technology, so that the economic recovery of fluorite resources in the flotation tailings cannot be realized, and only the fluorite resources can be regarded as the tailings to be discharged to a tailings pond for stacking and discarding, so that a great amount of fluorite resources are wasted each year, the potential and direct economic value loss is up to hundreds of millions, the capacity of the tailings pond is accelerated, the service life of the tailings pond is greatly shortened, and the technology bottleneck for restricting the high-quality sustainable development of enterprises is formed.
Fluorite in the discharged flotation tailings of the factory is difficult to recycle, and the following reasons mainly exist:
(1) The tailings have extremely complex mineral composition, especially contain a large amount of gangue minerals such as calcite, garnet and the like, and the crystal lattice contains Ca the same as that of fluorite minerals 2+ The physical and chemical properties of the surfaces of the active sites in the flotation process are very similar, and the sorting difficulty is high;
(2) The fluorite mineral is repeatedly and strongly inhibited by adding a large amount of water glass and acidified water glass in the flotation recovery process of the main target mineral recovered from the front end, the surface of the fluorite is subjected to serious medicament pollution and cover cap, and floatability is greatly reduced;
(3) The continuous biomass characteristics are that the dissociation difficulty of the monomer is high, the direct fine grinding is high in energy consumption and high in cost, overgrinding and mud formation of fragile and easy-to-grind minerals such as calcite can be caused, and the separation cannot be inhibited in the subsequent flotation operation.
Aiming at the flotation tailings of the type, the invention provides a brand new economical, efficient and environment-friendly mineral separation process which is imperative to practically solve the problems of pain points and difficulties of mine enterprises and break through the bottleneck of the current mineral separation technology.
Disclosure of Invention
The invention provides a high-efficiency beneficiation method for comprehensively recycling fluorite in flotation tailings, which aims to solve a series of technical problems of poor floatability of fluorite minerals in the flotation tailings with high fluorite content, low dissociation degree of fluorite monomers, difficult separation of calcium-containing gangue and the like, and has the characteristics of economy, high efficiency, environment friendliness, good quality of fluorite concentrate, high beneficiation recovery rate and the like.
An efficient beneficiation method for comprehensively recovering fluorite in high fluorite content flotation tailings, as shown in fig. 1, comprises the following steps:
a) Classifying the flotation tailings to obtain classified overflow ore pulp and classified sand setting;
b) Grinding the classified sand obtained in the step a) to obtain fine grinding pulp;
c) Mixing the classified overflow ore pulp obtained in the step a) with the fine grinding ore pulp in the step b) to obtain fluorite pre-selected rough concentrate;
d) Concentrating and dehydrating the fluorite pre-selected rough concentrate obtained in the step c) to obtain concentrated underflow ore pulp;
e) Adding an activating agent, a regulating agent and a collecting agent into the concentrated underflow ore pulp obtained in the step d), stirring, and performing fluorite flotation roughing to obtain fluorite rough concentrate;
f) Adding inhibitor A into the fluorite rough concentrate obtained in the step e) to perform one-stage concentration to remove silicate and carbonate gangue minerals, so as to obtain fluorite concentrate A;
g) Adding an inhibitor B into the fluorite concentrate A obtained in the step f) to perform secondary concentration decalcification to obtain fluorite concentrate B and a concentrate A, and returning the concentrate A to perform primary concentration;
h) Adding an inhibitor C into the fluorite concentrate B obtained in the step g) to perform three-stage concentration, quality improvement and impurity reduction to obtain fluorite concentrate C and a concentrate B, and returning the concentrate B to perform the two-stage concentration;
i) And (3) carrying out high-intensity magnetic separation and impurity removal on the fluorite concentrate C in the step h), wherein the obtained nonmagnetic product is fluorite concentrate.
In the beneficiation method, preferably, in the step a), the mass content of fluorite contained in the flotation tailings is 20-30%, the mass content of calcite is 10-30%, and the mass content of garnet is 20-30%; the dissociation degree of fluorite monomer in the flotation tailings is 40% -70%.
Preferably, in step a), the classification is performed by using a cyclone group, and the classification granularity comprises one of 0.030mm, 0.038mm, 0.045mm and 0.075 mm; in the step b), the classified sand setting is finely ground by adopting a moxa sand grinding machine or a tower grinding machine, so that the mass content of the particles with the fineness of-0.038 mm in the finely ground ore pulp is more than or equal to 50 percent.
Preferably, in step c), the classified overflow ore pulp obtained in step a) is mixed with the fine grinding ore pulp in step b), and then a pre-separation tailing discarding operation of removing iron-containing silicate minerals and gangue minerals in the flotation tailings is carried out in advance, so that fluorite pre-separation rough concentrate is obtained; the process for pre-selecting and discarding tailings comprises magnetic separation, heavy medium mineral separation or heavy separation, and iron-containing silicate minerals and gangue minerals in the flotation tailings are removed in advance so as to realize the pre-enrichment of fluorite.
Preferably, in the step d), the mass concentration of the underflow pulp after the fine grinding pulp and the classified overflow pulp are mixed for concentration and dehydration is 25% -55%, and the mass content of particles with the fineness of-0.038 mm in the underflow pulp is more than or equal to 70%;
in the step i), the high-intensity magnetic separation equipment adopted for the high-intensity magnetic separation impurity removal is a high-gradient high-intensity magnetic separator or a superconducting magnetic separator, the magnetic field intensity is 1.0T-5.0T, the number of the high-intensity magnetic separation sections is 1-3 times, and the magnetic products are returned to the ore grinding section of the step b) for fine grinding and re-separation after being concentrated and dehydrated.
Preferably, in the step e), the activator is an ionic fluorite activator CYNH, and specifically comprises the following raw materials in parts by weight: 1-30 parts of sodium fluoride, 1-30 parts of sodium monofluorophosphate and 1-100 parts of calcium chloride; the regulator comprises one or more of sodium carbonate, water glass, modified water glass, sodium hexametaphosphate, aluminum sulfate, carboxymethyl cellulose, sodium humate, tannin extract and dextrin; the collector comprises one or a combination of a plurality of oleic acid, sodium oleate, oxidized paraffin soap, dodecyl sulfonic acid/sodium sulfate, tall oil and CY-03. .
More preferably, the amount of the ionic fluorite activator CYNH is 600-800g/t; the regulator is sodium carbonate, and the dosage of the regulator is 400-600g/t; the collecting agent is CY-03, and the dosage of the collecting agent is 400-800g/t, wherein the CY-03 is obtained by preparing a solution by saponifying long-chain fatty acid, and then dissolving oxidized paraffin soap and glycol according to the weight ratio of 3:0.1-0.5:1-1.5; most preferably, the amount of the ionic fluorite activator CYNH is 800g/t; the regulator is sodium carbonate, and the dosage of the regulator is 400g/t; the collector is CY-03, and the dosage is 600-800g/t.
Preferably, in steps f), g), h), the first stage of selection comprises at least 2 selections, the second stage of selection comprises at least 2 selections, and the third stage of selection comprises at least 3 selections. The design of three-stage selection can greatly remove silicate gangue with higher content in tailings, realize high-efficiency enrichment of fluorite minerals, be favorable for ensuring fluorite flotation recovery rate, reduce fluorite loss in middlings in flotation operation, reduce subsequent floating entering treatment capacity and be favorable for controlling flotation cost.
Preferably, the inhibitor A, B, C comprises one or more of hydrochloric acid, water glass, sodium hexametaphosphate, aluminum sulfate, carboxymethyl cellulose, dextrin, tannin extract, acidified water glass, sodium fluosilicate and CYY-01; the acidified water glass is obtained by mixing sulfuric acid and water glass according to a mass ratio of 1:4, and the CYY-01 comprises the following raw materials in parts by weight: 50-100 parts of polyacrylic acid, 1-30 parts of polyaspartic acid and 1-20 parts of polymaleic acid.
More preferably, the inhibitor A and the inhibitor C are combined inhibitors of acidified water glass and sodium fluosilicate; the inhibitor B is a combined inhibitor of hydrochloric acid and CYY-01.
More preferably, in the combined inhibitor of the acidified water glass and the sodium fluosilicate, the dosage of the acidified water glass is 60-80g/t, and the dosage of the sodium fluosilicate is 60-80g/t, and most preferably 80g/t; in the combined inhibitor of the hydrochloric acid and the CYY-01, the dosage of the hydrochloric acid is 200-800g/t, and the dosage of the CYY-01 is 60-80g/t, and most preferably 80g/t.
Preferably, in step i), the high-intensity magnetic separation equipment used for the high-intensity magnetic separation impurity removal is a high-gradient high-intensity magnetic separator or a superconducting magnetic separator, the magnetic field intensity is 1.0T-5.0T, the number of the high-intensity magnetic separation sections is 1-3 times, and the magnetic product is concentrated and dehydrated and then returned to the ore grinding section of step b) for fine grinding and reselection until the basic monomer is dissociated.
Compared with the prior art, the invention has the following beneficial effects:
1) The beneficiation process method aims at the discharged flotation tailings of the beneficiation plant, breaks through the limit of the conventional beneficiation process, and obtains the fluorite concentrate grade CaF 2 More than or equal to 95 percent, and the recovery rate CaF 2 Good index of more than or equal to 83 percent, especially that CaF is obtained in fluorite flotation operation 2 The recovery rate is more than or equal to 90% of excellent index, the invention not only realizes the emission reduction of tailing resources and the comprehensive utilization of strategic resources, but also realizes the comprehensive recovery of the fluorite in the flotation tailings with high efficiency, has obvious economic benefit, and provides a new way and thought for the comprehensive utilization of the fluorite tailing resources of the same type;
2) According to the invention, the flotation tailings containing fluorite are subjected to pre-selection tailing discarding, gangue minerals such as garnet and the like which have the floatability similar to that of fluorite in the tailings are removed, and the pre-enrichment of fluorite is realized, so that the treatment capacity of grinding and floating operation can be reduced, the energy conservation and consumption reduction can be realized, the mineral composition of the input floating feed ore can be simplified, and the flotation operation environment can be improved;
3) According to the invention, the moxa sand grinding or tower grinding machine is preferably used as grading sand setting remilling equipment, the granularity distribution of the ground ore product is narrow, and the phenomena of overgrinding and undergrinding can be remarkably reduced;
4) According to the invention, the ionic fluorite efficient activator CYNH is added in roughing, so that silicate radicals covered on the surface of fluorite minerals can be effectively cleaned and stripped, and the fluorite floatability which is strongly inhibited in tailings can be deeply activated and recovered;
5) According to the invention, a high-efficiency calcite inhibitor CYY-01 is added in the carefully selecting process for combined use with hydrochloric acid, so that the method has the characteristics of good selectivity, strong inhibition capability and high stability, and only strong inhibition is generated for calcite in the flotation process, so that the method is friendly to fluorite, has no inhibition, and can realize high-efficiency separation of fluorite and calcite;
6) The invention adopts high-gradient strong magnetic separation or superconducting magnetic separation technology to separate undissociated minerals in the fluorite flotation concentrate in a adjoining state with the iron-containing silicate, and returns the low-quality magnetic product to the pre-grinding section for fine grinding and re-separation, thus obtaining a single high-quality fluorite concentrate product with high recovery rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a process for comprehensively recovering fluorite from flotation tailings of the present invention;
FIG. 2 is a flow chart of a process for comprehensively recovering fluorite from flotation tailings of a multi-metal separation plant in accordance with the embodiment 1 of the present invention;
FIG. 3 is a flow chart of a process for comprehensively recovering fluorite from flotation tailings of a multi-metal separation plant in accordance with the embodiment 2 of the present invention.
Detailed Description
The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the invention, but the scope of the invention is not limited to the specific embodiments shown.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present invention.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
The fluorite of the present invention has calcium fluoride (CaF 2 ) The method comprises the steps of carrying out a first treatment on the surface of the The main component of calcite is calcium carbonate (CaCO) 3 )。
The activating agent CYNH, the collecting agent CY-03 and the inhibitor CYY-01 are purchased from Changsha mining and metallurgy institute Limited liability company, address: the Yuenu area of Changsha city is the mountain foot and south road 966.
The activating agent CYNH is prepared by mixing the following raw materials in parts by weight: 10 parts of sodium fluoride, 10 parts of sodium monofluorophosphate and 80 parts of calcium chloride;
the collecting agent CY-03 is obtained by preparing a solution by saponifying C18 unsaturated fatty acid and dissolving oxidized paraffin soap and glycol according to the weight ratio of 3:0.3:1;
the inhibitor CYY-01 is prepared by mixing the following raw materials in parts by weight: 70 parts of polyacrylic acid, 20 parts of polyaspartic acid and 10 parts of polymaleic acid.
Example 1:
the invention relates to a high-efficiency beneficiation method for efficiently and comprehensively recycling fluorite in flotation tailings, which comprises the following steps of:
some polymetallic mill flotation tailings CaF treated in this example 2 Grade 26.25%, caCO 3 Grade 17.03%, fluorite is the main valuable mineral. The tailings have low metal mineral content, including cassiterite, scheelite, eudite, molybdenite, pyrite, limonite, chalcopyrite, pyrrhotite, magnetite and the like; the nonmetallic minerals mainly comprise fluorite, and then quartz, feldspar, garnet, sericite and the like, wherein the mass content of the quartz is 12.4%, the mass content of the feldspar is 4.5%, the mass content of the mica is 11.8%, the mass content of the garnet is 22.7%, and the mass content of the calcite is 22.3%. The fluorite particle size is uneven, the individual coarse size can be about 0.15mm, and is generally smaller than 0.10mm, the monomer yield accounts for about 50%, and the rest parts are tightly inlaid with quartz, sericite and garnet, so that the adjacent type conjoined characteristics are always shown.
The beneficiation method for efficiently and comprehensively recycling fluorite shown in fig. 2 comprises the following specific steps:
a) Classifying the flotation tailings containing low-grade fluorite discharged from the mill by adopting a cyclone group, wherein the classified granularity is 0.045mm, and obtaining classified overflow ore pulp and classified sand setting; the dissociation degree of fluorite monomer in the flotation tailings is 65%;
b) Finely grinding the classified sand setting in the step a) by using an moxa sand mill to obtain finely ground ore pulp, wherein the finely ground fineness is-0.038 mm, and the mass content of a particle size grade is 67%;
c) Mixing the classified overflow ore pulp obtained in the step a) with the fine grinding ore pulp in the step b) (the ore pulp fineness is-0.038 mm, the grain grade mass accounts for 82 percent), and performing preselection tailing discarding by adopting a strong magnetic separation process to obtain fluorite preselection rough concentrate with the yield of 81.45 percent and CaF 2 Grade 29.58%, caCO 3 Grade 20.13%, preselected tailing yield 18.55%, caF 2 Grade 11.64%;
d) Concentrating and dehydrating fluorite pre-selected rough concentrate in the step c) to obtain underflow ore pulp with the mass concentration of 40%;
e) Adding 400g/t of sodium carbonate as an adjusting agent into the concentrated underflow ore pulp in the step d), and carrying out flotation on 800g/t of fluorite activator CYNH and 600g/t of fluorite collector CY-03 to obtain fluorite rough concentrate and rough tailings;
f) Carrying out 2 times of concentration on fluorite rough concentrate in the step e) to remove silicate and carbonate gangue minerals, wherein the 1 st time of concentration inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio 1:4), 80g/t of sodium fluosilicate, the 2 nd time of concentration inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio 1:4), and 80g/t of sodium fluosilicate, so as to obtain fluorite concentrate 2, and discharging tailings of concentrate 1 and concentrate 2 together with rough tailings in the step e) for discarding;
g) Adding 600g/t hydrochloric acid and CYY-0180g/t calcite high-efficiency inhibitor into fluorite concentrate 2 in step f) to obtain fluorite concentrate 3, and returning middling 3 to concentrate 2;
h) Adding 200g/t hydrochloric acid and CYY-0180g/t calcite high-efficiency inhibitor into fluorite concentrate 3 in step g) to obtain fluorite concentrate 4, and returning middling 4 to concentrate 3;
i) Carrying out 5 th to 9 th fine selection on fluorite concentrate 4 in the step g), wherein each fine selection inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio is 1:4), 80g/t of sodium fluosilicate, and sequentially returning fine selection middlings 5 to middlings 9 to the previous fine selection operation to obtain fluorite concentrate 9;
j) The fluorite concentrate 9 concentrate in the step i) is subjected to ZH type flat ring high ladderThe strong magnetic separator performs primary separation, the magnetic field strength is 2.0T, the magnetic product is low-quality fluorite concentrate, the low-quality fluorite concentrate is concentrated and dehydrated and then returns to the pre-grinding section for fine grinding and re-separation, the non-magnetic product is high-quality fluorite concentrate, and the yield is 22.97 percent, caF 2 Grade 95.03%, caF 2 Recovery rate is 83.14%, caCO in fluorite concentrate 3 The grade is 0.95%.
By adopting the beneficiation method, the concentrate product CaF 2 The grade is improved by 14.62 percent compared with the conventional mineral separation process, and the CaF 2 The recovery rate is improved by 45 percent compared with the conventional ore dressing process, and CaCO in fluorite concentrate 3 The grade is reduced by 6.73 percent, and the quality and production index of the concentrate are obviously improved.
Example 2:
the invention relates to a high-efficiency beneficiation method for efficiently and comprehensively recycling fluorite in flotation tailings, which comprises the following steps of:
some polymetallic mill flotation tailings CaF treated in this example 2 Grade 31.44% (dissociation degree 50%), fluorite is the main valuable mineral. The gangue minerals mainly comprise garnet, quartz, mica, calcite, feldspar and the like, wherein the mass content of the garnet is 22.70%, the mass content of the quartz is 13.5%, the mass content of the mica is 12.6%, the mass content of the calcite is 12.1%, and the mass content of the feldspar is 4.5%.
The beneficiation method for efficiently and comprehensively recycling fluorite shown in fig. 3 comprises the following specific steps:
a) Classifying the flotation tailings containing fluorite discharged from the mill by adopting a cyclone group, wherein the classified granularity is 0.045mm, and obtaining classified overflow ore pulp and classified sand setting; the dissociation degree of fluorite monomer in the flotation tailings is 64%;
b) Finely grinding the classified sand setting in the step a) by adopting Ai Shamo to obtain finely ground ore pulp, wherein the finely ground fineness is 66% of the mass content of the fraction of-0.038 mm;
c) Mixing the classified overflow ore pulp obtained in the step a) with the fine grinding ore pulp in the step b) (the ore pulp fineness is-0.038 mm, the grain grade mass accounts for 81.5 percent), and performing preselection tailing discarding by adopting a strong magnetic separation process to obtain fluorite preselection coarse concentrate with the yield of 82.44 percent and CaF 2 Grade 35.27%, caCO 3 Grade 10.68%, preselected tailing yield 17.56%, caF 2 Grade 13.46%;
d) Concentrating and dehydrating fluorite pre-selected rough concentrate in the step c) to obtain underflow ore pulp with the mass concentration of 40%;
e) Adding 400g/t of sodium carbonate as an adjusting agent into the concentrated underflow ore pulp in the step d), and carrying out flotation on 800g/t of fluorite activator CYNH and 800g/t of fluorite collector CY-03 800g/t to obtain fluorite rough concentrate and rough tailings;
f) Carrying out 2 times of concentration on fluorite rough concentrate in the step e) to remove silicate and carbonate gangue minerals, wherein the 1 st time of concentration inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio 1:4), 80g/t of sodium fluosilicate, the 2 nd time of concentration inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio 1:4), and 80g/t of sodium fluosilicate, so as to obtain fluorite concentrate 2, and discharging tailings of concentrate 1 and concentrate 2 together with rough tailings in the step e) for discarding;
g) Adding 800g/t hydrochloric acid and CYY-0180g/t calcite high-efficiency inhibitor into fluorite concentrate 2 in step f) to obtain fluorite concentrate 3, and returning middling 3 to concentrate 2;
h) Adding 400g/t hydrochloric acid and CYY-0180g/t calcite high-efficiency inhibitor into fluorite concentrate 3 in step g) to obtain fluorite concentrate 4, and returning middling 4 to concentrate 3;
i) Carrying out 5 th to 7 th concentration on fluorite concentrate 4 in the step g), wherein each concentration inhibitor is 80g/t of acidified water glass (sulfuric acid: water glass mass ratio is 1:4) and 80g/t of sodium fluosilicate, so as to obtain fluorite concentrate 7, and sequentially returning the middlings 5 to 7 to the previous concentration operation;
j) Carrying out primary separation on fluorite concentrate 7 in the step i) by adopting a ZH type flat ring high gradient strong magnetic separator, wherein the magnetic field strength is 2.0T, the magnetic product is low-quality fluorite concentrate, the low-quality fluorite concentrate is concentrated and dehydrated and then returned to the pre-grinding section for fine grinding and re-separation, the non-magnetic product is high-quality fluorite concentrate product, and the yield is 27.20 percent and CaF 2 Grade 95.34%, caF 2 Recovery rate 83.48%, caCO in fluorite concentrate 3 The grade was 0.71%.
By adopting the beneficiation method, the concentrate product CaF 2 The grade is improved compared with the conventional ore dressing process13.06 percentage points, caF 2 The recovery rate is increased by 38.47 percent compared with the conventional ore dressing process, and CaCO in fluorite concentrate 3 The grade is reduced by 5.02 percentage points, and the fluorite concentrate quality and production index are obviously improved.
Compared with a method for recovering fluorite by a magnetic-floatation combined process of a persimmon bamboo garden east wave multi-metal concentrating mill, the method has the advantages that the fluorite grade is fed and CaCO is improved 3 Under the condition of similar grade, the concentrate product CaF is produced by adopting the ore dressing method 2 The grade is improved by 9.33 percentage points, caF 2 The recovery rate is improved by 12.28 percent, and the fluorite concentrate quality and the production index have obvious advantages.
Comparative example 1:
the ore sample used in this comparative example was recovered by flotation using a conventional fluorite flotation process as follows:
1) Finely grinding the flotation tailings by adopting a common ball mill until the fineness is-0.038 mm and accounts for 90 percent, and feeding the flotation tailings into roughing operation;
2) Adding 400g/t sodium carbonate, 1000g/t sodium silicate and 400g/t oleic acid into the roughing operation to obtain fluorite rough concentrate and roughing tailings;
3) Carrying out 2 times of concentration desilication on fluorite rough concentrate in the step 2), wherein the concentration 1 inhibitor is water glass 300g/t; selecting 2 inhibitor as water glass 200g/t to obtain fluorite concentrate 2, discharging tailings of middling 1 and middling 2 together with the roughing tailings in the step 2), and discarding;
the fluorite concentrate 2 in the step 3) is subjected to 3-8 times of concentration, and the concentration inhibitor is acidified sodium silicate (sulfuric acid: the mass ratio of the water glass is 1:4), the single consumption of the concentrated acidified water glass is 100g/t, the concentrated middlings 3-8 sequentially return to the previous concentration operation, and the fluorite concentrate yield is 12.45 percent, and the CaF is obtained 2 Grade is only 80.41%, caF 2 Recovery rate is only 38.14%, caCO in fluorite concentrate 3 The grade is 7.68 percent, the concentrate quality is poor, caF 2 The recovery rate is low, and the ore dressing ton concentrate cost is high.
Comparative example 2:
the samples used in this comparative example were identical to example 1, and the flotation process was essentially identical to example 1, except that: in the comparative example, the number of the substrates was,in the step g) and the step h), acidified water glass (sulfuric acid: water glass mass ratio 1:4) is adopted to replace calcite efficient inhibitor CYY-01, the dosage of the agents is 80g/t, and the yield of fluorite concentrate is 25.25%, caF is obtained 2 Grade 83.75%, caF 2 Recovery rate is only 80.55%, caCO in fluorite concentrate 3 The grade is as high as 11.43%, therefore, the inhibition capability of the conventional calcite inhibitor acidified water glass to calcite is far lower than that of the novel calcite inhibitor CYY-01, caCO in fluorite concentrate 3 The grade is significantly higher than that of example 1 by 10.48 percent, and becomes a main factor affecting the grade and quality of fluorite concentrate.
Comparative example 3:
the ore sample used in this comparative example was recovered by flotation using a conventional fluorite flotation process as follows:
1) Finely grinding the flotation tailings by adopting a ball mill until the fineness is-0.038 mm and 90 percent of the fineness is fed into roughing operation;
2) The dosage of sodium carbonate added in roughing operation is 400g/t, the dosage of sodium silicate is 1000g/t, and the dosage of collector is 500g/t, so that fluorite rough concentrate and roughing tailings are obtained;
3) Carrying out 2 times of concentration desilication on fluorite rough concentrate in the step 2), wherein the concentration 1 inhibitor is water glass 300g/t; selecting 2 inhibitor as water glass 200g/t to obtain fluorite concentrate 2, discharging tailings of middling 1 and middling 2 together with the roughing tailings in the step 2), and discarding;
3 rd to 7 th times of concentration is carried out on fluorite concentrate 2 in the step 3), the concentration inhibitor is acidified sodium silicate (sulfuric acid: sodium silicate mass ratio is 1:4), the single dosage of the concentration inhibitor is 100g/t, and the concentration middlings 3 to 7 are sequentially returned to the previous concentration operation, so that the low-grade fluorite concentrate with the yield of 17.20% and CaF is obtained 2 Grade 82.28%, caF 2 Recovery rate is only 45.01%, caCO in fluorite concentrate 3 The grade was 5.73%.
Comparative example 4:
the ore sample used in the comparative example is the same as that in example 2, and the fluorite mineral separation and recovery method adopting the fluorite concentration tailing magnetic-floatation combined process of the persimmon bamboo garden east wave polymetallic mineral separation plant comprises the following specific steps:
fluorite beneficiation of persimmon bamboo garden east wave multi-metal concentrating plantTailings (CaF) 2 Grade of 30.00%, caCO 3 8.50 percent of ore pulp with the concentration of 10 percent and the mass content of-0.075 mm particle size fraction accounting for 70 percent are firstly separated by a high-gradient strong magnetic separator, and the yield of the magnetic product is 34 percent under the condition that the working magnetic field intensity of the high-gradient strong magnetic separator is 0.5T and the pulse is 200 times per minute, and CaF is obtained 2 The grade is 12 percent, and the tailings are directly discharged into a tailing pond; the yield of the nonmagnetic product is 66%, caF 2 The grade is 39.27%, and the pulp is concentrated to 30% by feeding the pulp into a sloping plate thickener box;
feeding the concentrated non-magnetic product ore pulp in the step 1) into fluorite roughing operation, adding 400g/t of sodium carbonate, 4500g/t of inhibitor water glass and 650g/t of collector oleic acid for flotation to obtain fluorite rough concentrate and roughing tailings;
feeding the roughing tailings in the step 2) into scavenging 1 operation, wherein the dosage of oleic acid of scavenging 1 collector is 100g/t, so as to obtain scavenging 1 concentrate and scavenging tailings, and returning the scavenging concentrate to the roughing operation, wherein the scavenging tailings are directly discharged into a tailings pond;
five times of fine selection are carried out on fluorite rough concentrate in the step 2), and all the fine selection inhibitors from 1 to 5 are acidified water glass (sulfuric acid: the mass ratio of the water glass is 1:3), the dosage of the medicament is 300g/t, 200g/t, 150g/t, 100g/t and 80g/t in sequence, the middling 1 is selected to return to the rough concentration operation, the middlings 2-5 are sequentially returned to the previous concentration operation, and the fluorite concentrate product CaF is obtained 2 Grade 86.01%, caF 2 The recovery rate is 71.20%.
Claims (10)
1. The efficient beneficiation method for comprehensively recycling fluorite in high fluorite content flotation tailings is characterized by comprising the following steps of:
a) Classifying the flotation tailings to obtain classified overflow ore pulp and classified sand setting;
b) Grinding the classified sand obtained in the step a) to obtain fine grinding pulp;
c) Mixing the classified overflow ore pulp obtained in the step a) with the fine grinding ore pulp in the step b) to obtain fluorite pre-selected rough concentrate;
d) Concentrating and dehydrating the fluorite pre-selected rough concentrate obtained in the step c) to obtain concentrated underflow ore pulp;
e) Adding an activating agent, a regulating agent and a collecting agent into the concentrated underflow ore pulp obtained in the step d), stirring, and performing fluorite flotation roughing to obtain fluorite rough concentrate;
f) Adding inhibitor A into the fluorite rough concentrate obtained in the step e) to perform one-stage concentration to remove silicate and carbonate gangue minerals, so as to obtain fluorite concentrate A;
g) Adding an inhibitor B into the fluorite concentrate A obtained in the step f) to perform secondary concentration decalcification to obtain fluorite concentrate B and a concentrate A, and returning the concentrate A to perform primary concentration;
h) Adding an inhibitor C into the fluorite concentrate B obtained in the step g) to perform three-stage concentration, quality improvement and impurity reduction to obtain fluorite concentrate C and a concentrate B, and returning the concentrate B to perform the two-stage concentration;
i) And (3) carrying out high-intensity magnetic separation and impurity removal on the fluorite concentrate C in the step h), wherein the obtained nonmagnetic product is fluorite concentrate.
2. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 1, wherein in the step a), the mass content of fluorite contained in the flotation tailings is 20% -30%, the mass content of calcite is 10% -30%, and the mass content of garnet is 20% -30%; the dissociation degree of fluorite monomer in the flotation tailings is 40% -70%.
3. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 1, wherein in the step a), classification is performed by adopting a cyclone group, and the classification granularity comprises one of 0.030mm, 0.038mm, 0.045mm and 0.075 mm; in the step b), the classified sand setting is finely ground by adopting a moxa sand grinding machine or a tower grinding machine, so that the mass content of the particles with the fineness of-0.038 mm in the finely ground ore pulp is more than or equal to 50 percent.
4. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 1, wherein in the step c), the classified overflow ore pulp obtained in the step a) is mixed with the fine grinding ore pulp in the step b), and then the pre-separation tailing discarding operation of removing the iron silicate minerals and gangue minerals in the flotation tailings in advance is carried out, so that fluorite pre-separation rough concentrate is obtained; the process of preselecting and discarding the tail comprises magnetic separation, dense medium ore dressing or gravity separation;
in the step d), the mass concentration of the underflow ore pulp after the fine grinding ore pulp and the classified overflow ore pulp are mixed for concentration and dehydration is 25-55%, and the mass content of particles with the fineness of-0.038 mm in the underflow ore pulp is more than or equal to 70%;
in the step i), the high-intensity magnetic separation equipment adopted for the high-intensity magnetic separation impurity removal is a high-gradient high-intensity magnetic separator or a superconducting magnetic separator, the magnetic field intensity is 1.0T-5.0T, the number of the high-intensity magnetic separation sections is 1-3 times, and the magnetic products are returned to the ore grinding section of the step b) for fine grinding and re-separation after being concentrated and dehydrated.
5. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 1, wherein in the step e), the activator is ionic fluorite activator CYNH, and specifically comprises the following raw materials in parts by weight: 1-30 parts of sodium fluoride, 1-30 parts of sodium monofluorophosphate and 1-100 parts of calcium chloride; the regulator comprises one or more of sodium carbonate, water glass, modified water glass, sodium hexametaphosphate, aluminum sulfate, carboxymethyl cellulose, sodium humate, tannin extract and dextrin; the collector comprises one or a combination of a plurality of oleic acid, sodium oleate, oxidized paraffin soap, dodecyl sulfonic acid/sodium sulfate, tall oil and CY-03.
6. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 5, wherein the amount of the ionic fluorite activator CYNH is 600-800g/t; the regulator is sodium carbonate, and the dosage of the regulator is 400-600g/t; the collecting agent is CY-03, the dosage of which is 400-800g/t, wherein the CY-03 is obtained by preparing solution by saponification of long-chain fatty acid, oxidized paraffin soap and glycol according to the weight ratio of 3:0.1-0.5:1-1.5.
7. A method of beneficiating a high efficiency process in the integrated recovery of fluorite from flotation tailings according to any one of claims 1 to 6, wherein the primary beneficiation comprises at least 2 beneficiations, the secondary beneficiation comprises at least 2 beneficiations, and the tertiary beneficiation comprises at least 3 beneficiations.
8. The method for beneficiating the fluorite in the flotation tailings according to any one of claims 1 to 6, wherein the inhibitor A, B, C is selected from one or more of hydrochloric acid, water glass, sodium hexametaphosphate, aluminum sulfate, carboxymethyl cellulose, dextrin, tannin extract, acidified water glass, sodium fluosilicate and CYY-01; the acidified water glass is obtained by mixing sulfuric acid and water glass according to a mass ratio of 1:4, and the CYY-01 comprises the following raw materials in parts by weight: 50-100 parts of polyacrylic acid, 1-30 parts of polyaspartic acid and 1-20 parts of polymaleic acid.
9. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 8, wherein the inhibitor A and the inhibitor C are combined inhibitors of acidified sodium silicate and sodium fluosilicate; the inhibitor B is a combined inhibitor of hydrochloric acid and CYY-01.
10. The efficient beneficiation method for comprehensively recovering fluorite from flotation tailings according to claim 9, wherein in the combined inhibitor of the acidified water glass and the sodium fluosilicate, the dosage of the acidified water glass is 60-80g/t, and the dosage of the sodium fluosilicate is 60-80g/t; in the combined inhibitor of the hydrochloric acid and the CYY-01, the dosage of the hydrochloric acid is 200-800g/t, and the dosage of the CYY-01 is 60-80g/t.
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