CN108654830B - Method for recycling fluorite and dolomite from dolomite magnetite magnetic separation tailings - Google Patents
Method for recycling fluorite and dolomite from dolomite magnetite magnetic separation tailings Download PDFInfo
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- CN108654830B CN108654830B CN201810398951.7A CN201810398951A CN108654830B CN 108654830 B CN108654830 B CN 108654830B CN 201810398951 A CN201810398951 A CN 201810398951A CN 108654830 B CN108654830 B CN 108654830B
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- 239000010459 dolomite Substances 0.000 title claims abstract description 81
- 229910000514 dolomite Inorganic materials 0.000 title claims abstract description 81
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 46
- 239000010436 fluorite Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 34
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000007885 magnetic separation Methods 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title claims abstract description 8
- 238000005188 flotation Methods 0.000 claims abstract description 52
- 239000012141 concentrate Substances 0.000 claims abstract description 41
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 34
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 34
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- 229920002472 Starch Polymers 0.000 claims description 23
- 239000003518 caustics Substances 0.000 claims description 23
- 235000019698 starch Nutrition 0.000 claims description 23
- 239000008107 starch Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 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 9
- 239000000126 substance Substances 0.000 claims description 8
- 230000002000 scavenging effect Effects 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000003112 inhibitor Substances 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 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 4
- 239000005642 Oleic acid Substances 0.000 claims description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims description 2
- 229920001353 Dextrin Polymers 0.000 claims description 2
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- 238000009835 boiling Methods 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
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- 238000002360 preparation method Methods 0.000 claims description 2
- HBROZNQEVUILML-UHFFFAOYSA-N salicylhydroxamic acid Chemical compound ONC(=O)C1=CC=CC=C1O HBROZNQEVUILML-UHFFFAOYSA-N 0.000 claims description 2
- 238000010408 sweeping Methods 0.000 claims description 2
- 239000003784 tall oil Substances 0.000 claims description 2
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims description 2
- 229940033123 tannic acid Drugs 0.000 claims description 2
- 235000015523 tannic acid Nutrition 0.000 claims description 2
- 229920002258 tannic acid Polymers 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 229910021532 Calcite Inorganic materials 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- 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
- B03D1/018—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
- B03D2201/02—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
- B03D2201/06—Depressants
-
- 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
- B03D2203/04—Non-sulfide ores
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for recycling fluorite and dolomite from dolomite magnetite magnetic separation tailings. The method comprises the following steps: (1) ore grinding operation: further finely grinding the dolomite magnetite magnetic separation tailings until the particle size of the dolomite magnetite is-0.074 mm and the particle size of the magnetite is 92.23% -95.02%; (2) and (3) mixed flotation operation: coarse scanning and fine scanning; (3) separation flotation operation: a. performing mixed flotation to obtain concentrate and middling mixture; b. roughing; c. and (4) selecting. Compared with the traditional flotation method, the method has the advantages that fluorite and dolomite are separated by step flotation, less reagents are used, the environmental pollution is less, the taste and the recovery rate of the fluorite and the dolomite are higher due to the mixed flotation and the separation flotation, the grade of the fluorite can reach more than 90%, the recovery rate is more than 80%, the grade of the dolomite can reach more than 90%, the recovery rate is more than 80%, the fluorite cannot be separated from the dolomite in the step flotation, and the silicon dioxide is contained by more than 5%.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of resources, and relates to a method for efficiently recovering fluorite and dolomite from tailings after magnetic separation of dolomite magnetite in Baiyunebo-west mining areas.
Background
After the iron-containing rock sample of the Baiyuneboite is subjected to magnetic separation, fluorite (accounting for about 10%) and dolomite (accounting for about 67%) contained in tailings are comprehensively recovered and efficiently utilized, so that the defects of low iron grade and low economic benefit of the original ore can be overcome, the pressure of tailing discharge is reduced, the environment protection effect and the social significance are greater, and the national benefits and the people are realized.
The method for the iron-containing magnetic separation of the dolomite oboxi ore comprises the following steps: and (3) performing dry tailing discarding once, performing crushing high-pressure roller milling treatment again to obtain a product with the granularity of less than 3mm, and performing wet magnetic separation once, and performing regrinding-low-intensity magnetic separation on wet-separated concentrate. The finally obtained magnetic separation tailings have uneven granularity, and the flotation granularity is not enough and needs further fine grinding.
Dolomite can be used as a refractory inner layer of a converter for steelmaking, a slag former, a cement raw material, a glass flux, kiln industry, a fertilizer, building and decorative stone, paint, an insecticide, medicine and the like. Can be used in the fields of building materials, ceramics, glass, refractory materials, chemical industry, agriculture, environmental protection, energy conservation and the like.
After the iron-containing rock sample of the Baiyuneboite is subjected to magnetic separation, dolomite and fluorite cannot be floated out by single flotation of carbonate and iron ores contained in tailings, the main reason is that the dolomite and the fluorite have the same mineral flotation property as the dolomite and the fluorite, and a good effect is not achieved when the pyrite is floated by adding xanthate in the flotation process, and a large amount of iron minerals are still contained in the concentration process, so that the flotation effect is poor. When the fluorite and the dolomite are singly separated from the tailings, because the calcite in the dolomite, the fluorite and the tailings belong to calcium-containing minerals, the crystal lattices all contain Ca2+So that their surfaces have similar physicochemical properties. When the common inhibitor collecting agents such as water glass and oleic acid are adopted, the separation of dolomite, fluorite and calcite in tailings is difficult to realize.
Based on the reasons, the inventor explores a method for recovering fluorite and dolomite from the dolomite magnetite magnetic separation tailings through scientific exploration and a large number of experimental demonstrations.
Disclosure of Invention
The invention aims to provide a method for recovering fluorite and dolomite from dolomite magnetite magnetic separation tailings in view of the defects in the prior art, and the method is more rapid in recovering fluorite and dolomite from the tailings after the dolomite magnetite magnetic separation in Baiyunebo West mine, high in grade and recovery rate and low in cost.
The technical scheme of the invention is that the method for recovering fluorite and dolomite from the dolomite magnetite magnetic separation tailings comprises the following steps:
(1) ore grinding operation: further finely grinding the dolomite magnetite magnetic separation tailings until the particle size of the dolomite magnetite is-0.074 mm and the particle size of the magnetite is 92.23% -95.02%;
(2) and (3) mixed flotation operation: one coarse scanning and five fine scanning
a. Roughing: preparing 5% solution from sodium carbonate, water glass and aluminum sulfate according to mass fraction, adding 5% sodium hydroxide solution into caustic starch at the temperature of 90-100 ℃ to prepare 5% caustic starch solution without boiling in the preparation process; preparing a collecting agent FX-6Y into a solution with the mass fraction of 3% in a constant temperature box; the concentration of the ore pulp is controlled to be 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0; sequentially adding 750g/t of sodium carbonate 650-;
b. sweeping: carrying out scavenging operation at the concentration of 20-25%, the temperature of 20-25 ℃ and the pH value of 9.0-10.0 to obtain scavenged concentrate and tailings, wherein the scavenged concentrate needs to be further refined;
c. primary fine selection: performing flotation on scavenging concentrate, roughing concentrate and selecting middling 1 at the pulp concentration of 20-25%, the temperature of 20-25 ℃ and the pH value of 9.0-10.0, and adding 200g/t of caustic starch and 400g/t of water glass to obtain concentrate 1 and middling 1;
d. secondary fine selection: performing flotation on the concentrate 1 and the concentrated middling 2 under the conditions that the concentration of the ore pulp is 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0, adding 150g/t of caustic starch and 300g/t of water glass, and performing flotation for two minutes to obtain the concentrate 2 and the middling 2;
e. and (3) selecting for three times: flotation of the concentrate 2 is carried out for two minutes under the conditions that the concentration of the ore pulp is 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0, so as to obtain concentrate 3 and middling 3;
f. four times of selection: carrying out flotation on the concentrate 3 at the concentration of 20-25% of the ore pulp, the temperature of 20-25 ℃ and the natural pH value for two minutes to obtain a concentrate 4 and a middling 4;
g. and (4) five times of selection: carrying out flotation on the concentrate 4 at the concentration of 20-25% of the ore pulp, the temperature of 20-25 ℃ and the natural pH value for two minutes to obtain a concentrate 5 and a middling 5;
(3) separation flotation operation:
a. performing mixed flotation to obtain a mixture of concentrate and middlings 3, 4 and 5;
b. roughing: separating and floating under acidic condition, wherein acidic water glass and KD are used as inhibitor, and Y-2 is used as collector; the inhibitor KD is prepared from tannic acid and dextrin according to a ratio of 4: 1; the collecting agent Y-2 is formed by mixing salicylhydroxamic acid and oleic acid according to the ratio of 1: 3;
the temperature of the ore pulp is 30-40 ℃, the pH value is 4.5-5.5, and the following components are added in sequence: 7600g/t concentrated sulfuric acid 7200-;
c. selecting: the roughing tailings are finely selected under the conditions that the temperature of the ore pulp is 30-40 ℃ and the pH value is 4.5-5.5, so that dolomite concentrate and tailings are obtained.
According to the embodiment of the invention, the ore sample obtained in the step (1) is continuously finely ground to be-0.074 mm accounting for 94.52%.
According to the embodiment of the invention, the dosage of sodium carbonate in the roughing process of the step (2) is 700g/t, the dosage of water glass is 600g/t, the dosage of aluminum sulfate is 150g/t, the dosage of caustic starch is 1100g/t, and the dosage of the collecting agent FX-6Y is 1000 g/t.
According to the embodiment of the invention, the dosage of the added agents in the separation flotation operation in the step (3) is as follows: 7400g/t of concentrated sulfuric acid, 3000g/t of acidified water glass, 1000g/t of KD and 2500g/t of Y-2.
According to an embodiment of the invention, the collector FX-6Y is a mixture of oxidized paraffin and crude tall oil in a ratio of 1: 1.
In the method for recovering fluorite and dolomite from dolomite magnetite magnetic separation tailings, the main reason why tailings obtained after the dolomite magnetite magnetic separation of the baiyunebosxi ore are finely ground to-0.074 mm content which accounts for 92.23% -95.02% in the step (1) is that: the mineral components are complex, the content of dolomite accounts for more than 67%, fluorite is mostly in continuous crystallization with dolomite, and other components are mostly in continuous crystallization with dolomite, or are distributed in cracks of carbonate minerals.
In the method for recycling fluorite and dolomite from dolomite magnetite magnetic separation tailings, the step (2) adopts mixed flotation, dolomite in tailings after the dolomite magnetite magnetic separation of the baiyunebosxi ore belongs to calcium-containing minerals, fluorite and calcite in the tailings belong to calcium-containing minerals, and crystal lattices all contain Ca2+So that their surfaces have similar physicochemical properties. When the common inhibitor collecting agents such as water glass and oleic acid are adopted, the separation of dolomite, fluorite and calcite in tailings is difficult to realize.
In the method for recovering fluorite and dolomite from dolomite magnetite magnetic separation tailings, the step (2) of mixed flotation is carried out, caustic starch is added in the first and second concentration steps, and water glass is added to inhibit iron ore content. During the separation process, a certain amount of aluminum sulfate is added, and the aluminum sulfate can be used together with water glass to activate fluorite and dolomite and reduce silicon dioxide.
The invention has the following beneficial effects: (1) compared with the traditional flotation method, the method for recycling fluorite and dolomite from the dolomite magnetite magnetic separation tailings has the advantages that the step-by-step flotation separation of fluorite and dolomite is realized, the used medicament is less, the environmental pollution is less, the taste and the recovery rate of the fluorite and the dolomite obtained by the mixed flotation and the separation flotation are higher, the situation that the fluorite cannot be separated from the dolomite in the step-by-step flotation and the content of silicon dioxide is more than 5% cannot occur. (2) The flotation scheme of separation flotation is added, the flotation recovery rate of dolomite and fluorite can be improved, and separation flotation after mixed flotation is more favorable for separating the dolomite and the fluorite. (3) The method for recycling fluorite and dolomite from the dolomite magnetite magnetic separation tailings has simple steps and low cost. (4) For those calcium fluoride minerals containing high calcium type, a reliable flotation scheme is provided.
Drawings
In order to better understand the invention, the flow and the implementation mode of the method for recovering fluorite and dolomite from the dolomite magnetite magnetic separation tailings are shown in a flow chart.
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1, the tailings after magnetic separation of the dolomite magnetite from the baiyunebuoxi ore are finely ground to-0.074 mm content of 92.23%; the mixed flotation process comprises the steps of one roughing, one scavenging and five fine selecting, wherein the dosage of the chemicals for roughing is respectively as follows: 650g/t of sodium carbonate, 550g/t of water glass, 100g/t of aluminum sulfate, 1000g/t of caustic starch and 1000g/t of collecting agent FX-6Y900g/t, wherein the caustic starch and the water glass are added in the first and second concentration processes, 200g/t of caustic starch and 400g/t of water glass are added in the concentration 1, 150g/t of caustic starch and 300g/t of water glass are added in the concentration 2, and the pH value is adjusted to 9.0-10.0 by the sodium carbonate; concentrated sulfuric acid, acidified water glass, KD and Y-2 are added in the separation flotation operation to respectively obtain concentrate products of fluorite and dolomite, and the dosage of the chemicals is respectively as follows: 7200g/t of concentrated sulfuric acid, 2700g/t of acidified water glass, 900 KD900g/t and Y-22400 g/t; and finally, the grade of the fluorite concentrate is 92.31 percent, the recovery rate is 81.56 percent, the grade of the dolomite concentrate is 91.02 percent, and the recovery rate is 82.10 percent.
Example 2, the tailings after the magnetic separation of the dolomite magnetite from the baiyunebuoxi mine are finely ground to-0.074 mm content of 94.43%; the mixed flotation process comprises the steps of one roughing, one scavenging and five fine selecting, wherein the dosage of the chemicals for roughing is respectively as follows: 700g/t of sodium carbonate, 600g/t of water glass, 150g/t of aluminum sulfate, 1100g/t of caustic starch and 1100g/t of collecting agent FX-6Y1000g/t, wherein the caustic starch and the water glass are added in the first and second concentration processes, 200g/t of caustic starch and 400g/t of water glass are added in the concentration 1, 150g/t of caustic starch and 300g/t of water glass are added in the concentration 2, and the pH is adjusted to be 9.0-10.0 by adding the sodium carbonate; concentrated sulfuric acid, acidified water glass, KD and Y-2 are added in the separation flotation operation to respectively obtain concentrate products of fluorite and dolomite, and the dosage of the chemicals is respectively as follows: 7300g/t concentrated sulfuric acid, 2800g/t acidified water glass, 1000 KD1000g/t and Y-22500 g/t; and finally, the grade of the fluorite concentrate is 95.23%, the recovery rate is 82.15%, the grade of the dolomite concentrate is 92.48%, and the recovery rate is 84.12%.
Example 3, the tailings after magnetic separation of the dolomite magnetite from the baiyunebuoxi mine are finely ground to-0.074 mm content of 95.43%; the mixed flotation process comprises the steps of one roughing, one scavenging and five fine selecting, wherein the dosage of the chemicals for roughing is respectively as follows: 750g/t of sodium carbonate, 650g/t of water glass, 200g/t of aluminum sulfate, 1200g/t of caustic starch and 1200g/t of collecting agent FX-6Y1200g/t, wherein the caustic starch and the water glass are added in the first and second concentration processes, 200g/t of caustic starch and 400g/t of water glass are added in the concentration 1, 150g/t of caustic starch and 300g/t of water glass are added in the concentration 2, and the pH is adjusted to be 9.0-10.0 by adding the sodium carbonate; concentrated sulfuric acid, acidified water glass, KD and Y-2 are added in the separation flotation operation to respectively obtain concentrate products of fluorite and dolomite, and the dosage of the chemicals is respectively as follows: 7400g/t of concentrated sulfuric acid, 3000g/t of acidified water glass, KD1100g/t and Y-22500 g/t; and finally, the grade of the fluorite concentrate is 93.26%, the recovery rate is 81.01%, the grade of the dolomite concentrate is 90.78%, and the recovery rate is 80.45%.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A method for recovering fluorite and dolomite from dolomite magnetite magnetic separation tailings is characterized by comprising the following steps:
(1) ore grinding operation: further finely grinding the dolomite magnetite magnetic separation tailings until the particle size of the dolomite magnetite is-0.074 mm and the particle size of the magnetite is 92.23% -95.02%;
(2) and (3) mixed flotation operation: one coarse scanning and five fine scanning
a. Roughing: preparing 5% solution from sodium carbonate, water glass and aluminum sulfate according to mass fraction, adding 5% sodium hydroxide solution into caustic starch at the temperature of 90-100 ℃ to prepare 5% caustic starch solution without boiling in the preparation process; preparing a collecting agent FX-6Y into a solution with the mass fraction of 3% in a constant temperature box; the concentration of the ore pulp is controlled to be 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0; sequentially adding 750g/t of sodium carbonate 650-;
b. sweeping: carrying out scavenging operation at the concentration of 20-25%, the temperature of 20-25 ℃ and the pH value of 9.0-10.0 to obtain scavenged concentrate and tailings, wherein the scavenged concentrate needs to be further refined;
c. primary fine selection: performing flotation on scavenging concentrate, roughing concentrate and selecting middling 1 at the pulp concentration of 20-25%, the temperature of 20-25 ℃ and the pH value of 9.0-10.0, and adding 200g/t of caustic starch and 400g/t of water glass to obtain concentrate 1 and middling 1;
d. secondary fine selection: performing flotation on the concentrate 1 and the concentrated middling 2 under the conditions that the concentration of the ore pulp is 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0, adding 150g/t of caustic starch and 300g/t of water glass, and performing flotation for two minutes to obtain the concentrate 2 and the middling 2;
e. and (3) selecting for three times: flotation of the concentrate 2 is carried out for two minutes under the conditions that the concentration of the ore pulp is 20-25%, the temperature is 20-25 ℃, and the pH value is 9.0-10.0, so as to obtain concentrate 3 and middling 3;
f. four times of selection: carrying out flotation on the concentrate 3 at the concentration of 20-25% of the ore pulp, the temperature of 20-25 ℃ and the natural pH value for two minutes to obtain a concentrate 4 and a middling 4;
g. and (4) five times of selection: carrying out flotation on the concentrate 4 at the concentration of 20-25% of the ore pulp, the temperature of 20-25 ℃ and the natural pH value for two minutes to obtain a concentrate 5 and a middling 5;
(3) separation flotation operation:
a. performing mixed flotation to obtain a mixture of concentrate and middlings 3, 4 and 5;
b. roughing: separating and floating under acidic condition, wherein acidic water glass and KD are used as inhibitor, and Y-2 is used as collector; the inhibitor KD is prepared from tannic acid and dextrin according to a ratio of 4: 1; the collecting agent Y-2 is formed by mixing salicylhydroxamic acid and oleic acid according to the ratio of 1: 3;
the temperature of the ore pulp is 30-40 ℃, the pH value is 4.5-5.5, and the following components are added in sequence: 7600g/t concentrated sulfuric acid 7200-;
c. selecting: the roughing tailings are finely selected under the conditions that the temperature of the ore pulp is 30-40 ℃ and the pH value is 4.5-5.5, so that dolomite concentrate and tailings are obtained.
2. The method for recovering fluorite and dolomite from the dolomite magnetite magnetic separation tailings according to claim 1, wherein the ore sample obtained in the step (1) is continuously finely ground to-0.074 mm accounting for 94.52%.
3. The method for recycling fluorite and dolomite from the dolomite magnetite magnetic separation tailings according to claim 1, wherein the using amount of sodium carbonate in the roughing process in the step (2) is 700g/t, the using amount of water glass is 600g/t, the using amount of aluminum sulfate is 150g/t, the using amount of caustic starch is 1100g/t, and the using amount of the collecting agent FX-6Y is 1000 g/t.
4. The method for recycling fluorite and dolomite from the dolomite magnetite magnetic separation tailings according to claim 1, wherein the amount of the added chemicals in the separation flotation operation of the step (3) is as follows: 7400g/t of concentrated sulfuric acid, 3000g/t of acidified water glass, 1000g/t of KD and 2500g/t of Y-2.
5. The method for recovering fluorite and dolomite from the dolomite magnetite magnetic separation tailings according to claim 1 or 3, wherein the collecting agent FX-6Y is formed by mixing oxidized paraffin and crude tall oil according to a ratio of 1: 1.
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| CN110743712A (en) * | 2019-09-11 | 2020-02-04 | 西安矿源有色冶金研究院有限公司 | Method for improving fluorite concentrate grade |
| CN112875738A (en) * | 2021-02-01 | 2021-06-01 | 大冶市鑫鼎实业有限公司 | Process for refining dolomite purity by decomposition and desulfurization |
| CN113843183B (en) * | 2021-10-11 | 2023-07-14 | 内蒙古宏鉮科技发展有限责任公司 | Fluorite sorting method for Baiyunebo iron-containing surrounding rock |
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| CN103691567B (en) * | 2013-12-17 | 2015-09-02 | 广西大学 | The flotation separation method of a kind of fluorite in acid condition and dolomite |
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