CN115254440A - Application of curdlan as inhibitor in fluorite ore flotation and application method thereof - Google Patents
Application of curdlan as inhibitor in fluorite ore flotation and application method thereof Download PDFInfo
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- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 title claims abstract description 131
- 239000001879 Curdlan Substances 0.000 title claims abstract description 130
- 229920002558 Curdlan Polymers 0.000 title claims abstract description 130
- 229940078035 curdlan Drugs 0.000 title claims abstract description 130
- 235000019316 curdlan Nutrition 0.000 title claims abstract description 130
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 123
- 239000010436 fluorite Substances 0.000 title claims abstract description 123
- 238000005188 flotation Methods 0.000 title claims abstract description 62
- 239000003112 inhibitor Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 147
- 239000012141 concentrate Substances 0.000 claims abstract description 56
- 239000007864 aqueous solution Substances 0.000 claims abstract description 42
- 239000010459 dolomite Substances 0.000 claims abstract description 21
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 21
- 229910021532 Calcite Inorganic materials 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 230000002000 scavenging effect Effects 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 20
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical group [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 19
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 17
- 239000011707 mineral Substances 0.000 abstract description 17
- 238000000926 separation method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010979 pH adjustment Methods 0.000 abstract 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 19
- 235000019353 potassium silicate Nutrition 0.000 description 18
- 239000000203 mixture Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 238000007670 refining Methods 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 229910052595 hematite Inorganic materials 0.000 description 4
- 239000011019 hematite Substances 0.000 description 4
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920001503 Glucan Polymers 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000004909 Moisturizer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 241000411851 herbal medicine Species 0.000 description 1
- 150000002433 hydrophilic molecules Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 230000001333 moisturizer Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229940126680 traditional chinese medicines Drugs 0.000 description 1
Images
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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
-
- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
An application of curdlan as an inhibitor in fluorite ore flotation and an application method thereof belong to the technical field of fluorite ore flotation. The application adopts curdlan as an inhibitor in fluorite ore flotation, and the application method comprises the steps of size mixing, pH adjustment, addition of sodium hydroxide aqueous solution of the curdlan and a collecting agent, and fluorite flotation operation to obtain fluorite concentrate and tailings. The curdlan is used as an inhibitor in fluorite ore flotation, has better inhibition effect, lower dosage, degradability and environmental friendliness, can selectively inhibit calcite and dolomite minerals in the fluorite ore flotation, and realizes the separation of fluorite, calcite and dolomite.
Description
Technical Field
The invention belongs to the technical field of fluorite ore flotation, and particularly relates to application of curdlan as an inhibitor in fluorite ore flotation and an application method thereof.
Background
Fluorite, also called fluorite, which is one of the important sources of fluorine elements, is a mineral commonly seen in nature, frequently coexists with dolomite and calcite, and the floatability of the dolomite and the calcite is similar. Therefore, the depressants must be added during the flotation separation to effectively separate the fluorite from the dolomite and the calcite. At present, the most common flotation depressants in the industry are water glass or modified water glass, which are used in large quantities. And the strong alkalinity of the ore pulp makes the ore pulp easily cause water body pollution.
Curdlan is a linear polysaccharide polymer consisting of 400-500D-glucose residues through beta-1, 3-D-glucoside bonds, has no branched chain structure, is widely applied, for example, can replace glucan as a filler in a column, and obtains better separation effect. The mixture prepared from curdlan and activated carbon can effectively remove heavy metal elements in Chinese herbal medicines, and is particularly beneficial to the development of traditional Chinese medicines; and is also effective as a thickener, a suspending agent, a stabilizer, a moisturizer and a rheology modifier in the cosmetic industry, and thus can be applied to various types of cosmetics. In the field of mineral processing, it is used as a hematite inhibitor. CN 113477408A discloses an application and an application method of curdlan as an inhibitor in iron ore reverse flotation in the field of mineral processing, wherein ore separation is performed on hematite and gangue minerals such as quartz, and the curdlan is selectively adsorbed on the surface of the hematite, so that the hydrophilicity of the hematite is increased, the floatability is reduced, and the floatability of the gangue minerals such as quartz is not affected, thereby enabling iron minerals to be enriched from the gangue minerals. The method is not applied to the flotation separation of calcium-containing minerals, and the calcium-containing mineral system is different from an iron ore flotation system because the surfaces of minerals of the calcium-containing mineral system contain calcium ions which are sites for the interaction with a medicament hydrophilic group, so that the search for effective inhibitors of the calcium-containing mineral system is extremely difficult.
The mineral properties of the existing fluorite ore are more and more complex, the dosage of the commonly used inhibitor is large, the inhibition effect is poor, and the method is not environment-friendly.
Disclosure of Invention
The application of the curdlan as the inhibitor in the fluorite ore flotation is better in inhibition effect, lower in dosage, degradable and environment-friendly, and can selectively inhibit calcite and dolomite minerals in the fluorite ore flotation so as to realize the separation of fluorite, calcite and dolomite.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the application of the curdlan serving as an inhibitor in fluorite ore flotation is as follows: during the flotation process of fluorite ore, curdlan is added.
The curdlan is used as an inhibitor of dolomite and calcite in fluorite flotation, and separation of fluorite from dolomite and calcite is realized.
The application of the curdlan serving as an inhibitor in fluorite ore flotation is realized, and the adopted fluorite ore is dolomite fluorite ore and/or calcite fluorite ore.
The application of the curdlan as the inhibitor in fluorite ore flotation is to apply the curdlan as the inhibitor to the rough concentration stage and the fine concentration stage of fluorite flotation.
The application of the curdlan as an inhibitor in fluorite ore flotation is realized by preparing the curdlan into a sodium hydroxide aqueous solution of the curdlan with the mass concentration of 0.5-2% for use.
The application method of the curdlan as the inhibitor in the fluorite ore flotation comprises the steps of size mixing, pH adjusting, adding sodium hydroxide aqueous solution of the curdlan and a collecting agent, and performing fluorite flotation:
the flotation operation comprises the following steps: firstly, roughing is carried out, roughing concentrate and roughing tailings are obtained, the roughing concentrate is added into the aqueous sodium hydroxide solution of curdlan again for first concentration, and then first concentration concentrate and first concentration tailings are obtained; adding the curdlan sodium hydroxide aqueous solution into the first concentrated concentrate again to continue to carry out second concentration to obtain second concentrated concentrate and second concentrated tailings; returning the secondary concentrated tailings to the previous concentration operation, and adding the secondary concentrated concentrate into the sodium hydroxide aqueous solution of curdlan again to perform the next concentration operation; repeating the fine concentration for 6-8 times to obtain fluorite concentrate;
performing primary scavenging operation on the roughing tailings, performing primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings, and returning the primary scavenging concentrate and the primary concentrating tailings to the roughing operation; and performing secondary scavenging on the primary scavenged tailings, wherein secondary scavenged concentrate and final tailings are obtained through secondary scavenging, and the secondary scavenged concentrate returns to the primary scavenging operation.
The final tailings are mainly dolomite and/or calcite gangue.
The pulp mixing adopts fluorite raw ore with fineness of-74 mu m, and the proportion of the fluorite raw ore is 60-80%.
The pH value is adjusted to 7-9 by adopting sodium carbonate.
The collecting agent is added, sodium oleate is selected as the collecting agent, and 800-1500g of the collecting agent is added into each ton of fluorite ore.
In the flotation process, the total consumption of the curdlan is 400-500g per ton of fluorite, wherein the roughing stage is 300-400g/t, and the total amount of the curdlan added in the fine selection stage is 30-100g/t.
The sodium hydroxide aqueous solution of the curdlan accounts for 15-20% of the mass of the curdlan by the mass of the sodium hydroxide; dissolving curdlan and sodium hydroxide in water, and adding the curdlan to obtain a mixed solution; heating the mixed solution to 80-90 deg.C, stirring at constant temperature for 10-20min, and diluting with water to obtain curdlan sodium hydroxide aqueous solution with mass concentration of 0.5-2%.
In the rough concentration stage, 300-400g of curdlan is added per ton of fluorite ore, and in the fine concentration stage, 30-100g of curdlan is added per ton of fluorite ore.
Furthermore, the selection times are 6-8 times, and the scavenging times are 1-2 times.
The key points of the technology of the invention are as follows:
the curdlan is formed by polymerizing glucose monomers, contains a large number of hydroxyl groups which are hydrophilic groups and hydrophilic-solid groups, and can generate carboxyl groups when being prepared by alkaline liquor, so that the curdlan has stronger adsorption effect on gangue such as litholysis stone, dolomite and the like. Furthermore curdlan is itself a hydrophilic compound. So that the floatability difference between the gangue minerals and the target minerals is enlarged, and the fluorite is enriched.
The application of the curdlan as the inhibitor in fluorite ore flotation and the application method thereof have the advantages that:
according to the invention, the curdlan is used for enriching fluorite ore by utilizing the difference of adsorption capacities of the curdlan to the dolomite, the calcite and the fluorite. (i.e., it selectively adsorbs to the dolomite and calcite surfaces, resulting in enhanced hydrophilicity; while the fluorite remains available for interaction with sodium oleate, resulting in enhanced hydrophobicity). The invention mainly utilizes the method to recover fluorite resources by increasing the hydrophobicity difference of three minerals.
The product has the advantages that:
(1) The curdlan is used as the fluorite flotation inhibitor for the first time, so that the method has great significance for efficient development and utilization of fluorite resources;
(2) Compared with water glass, the curdlan is small in dosage and strong in selectivity;
(3) The curdlan is easy to degrade, has no pollution and is an environment-friendly inhibitor.
Drawings
FIG. 1 shows a fluorite flotation process.
Detailed Description
The present invention will be described in further detail with reference to examples.
The curdlan aqueous solution used in the following examples was prepared by the following method:
taking 10g curdlan and 2g sodium hydroxide, taking 200mL of water to dissolve the sodium hydroxide, then adding the curdlan, placing the mixture in a water bath kettle, heating to 90 ℃, stirring for 15min at constant temperature, and then adding water to a constant volume to obtain a 1% sodium hydroxide aqueous solution of the curdlan.
The fluorite flotation scheme of the following example is shown in figure 1.
Example 1
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is calcite type fluorite ore, and comprises the following components in percentage by mass: caF 2 30.2% of CaCO 3 5.1% of SiO 2 The content was found to be 51.23%.
The method comprises the following specific operation steps: firstly, 300g of fluorite ore is ground until the content of minus 74 mu m accounts for 75 percent, the ground fluorite ore is added into a 0.75L flotation tank, the pH value of the ore pulp is adjusted to 8.5 by sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 200g/t, after stirring is carried out for 5min, then sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1000g/t, and the rough concentration is started. And roughing concentrate and roughing tailings are obtained through roughing. Adding the rough concentration concentrate into the sodium hydroxide aqueous solution of curdlan again for first concentration to obtain first concentrated concentrate and first concentrated tailings; adding the curdlan sodium hydroxide aqueous solution into the first concentrated concentrate again to continue to carry out second concentration to obtain second concentrated concentrate and second concentrated tailings; returning the secondary concentrated tailings to the previous concentration operation, and adding the secondary concentrated concentrate into the sodium hydroxide aqueous solution of curdlan again to perform the next concentration operation; and continuously and repeatedly carrying out concentration for 6 times to obtain fluorite concentrate. And carrying out primary scavenging on the roughed tailings. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. The total amount of curdlan added in 6 selections is 90g/t. Other flotation conditions were not changed, and only curdlan was changed to water glass to conduct a water glass usage test as comparative example 1. The comparison results are shown in the following table:
example 2
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is calcite type fluorite ore, and comprises the following components in percentage by mass: caF 2 19.2% of CaCO 3 7.1% of SiO 2 It was 49.23%.
The specific operation steps are that 300g of fluorite ore is ground until the content of-74 mu m accounts for 80%, the mixture is added into a 0.75L flotation tank, the pH value is adjusted to 8.5 by using sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 250g/t, after stirring is carried out for 5min, sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1000g/t, and rough concentration is started. And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate was further refined 8 times to obtain fluorite concentrate, and the refining process was the same as in example 1. And carrying out primary scavenging on the rougher tailings. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. The total amount of curdlan added in 8 times of selection is 90g/t.
Other flotation conditions were not changed, and only curdlan was changed to water glass to conduct a water glass usage test as comparative example 2. The comparison results are shown in the following table:
example 3
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is a low-grade dolomite fluorite ore with a fluorite grade of 37% and a dolomite grade of 51%.
The specific operation steps are that 300g of fluorite ore is ground until the content of-74 mu m accounts for 85%, the mixture is added into a 0.75L flotation tank, the pH value is adjusted to 8.5 by using sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 300g/t, the mixture is stirred for 5min, and then sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1000g/t, and the rough concentration is started.
And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate is further refined 8 times to obtain fluorite concentrate, and the refining process is the same as in example 1. Performing two scavenging on the roughed tailings, which specifically comprises the following steps: performing primary scavenging operation on the roughing tailings, performing primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings, and returning the primary scavenging concentrate and the primary concentrating tailings to the roughing operation; and (3) carrying out secondary scavenging on the primary scavenged tailings, obtaining secondary scavenged concentrate and final tailings by the secondary scavenging, returning the secondary scavenged concentrate to the primary scavenging operation, and only adding a sodium hydroxide aqueous solution of curdlan in the concentration operation. The total amount of curdlan added in 8 selections is 100g/t.
Other flotation conditions were not changed, and only curdlan was changed to water glass to conduct a water glass dosage test as comparative example 3. The comparison results are shown in the following table:
example 4
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is calcite type fluorite ore, and comprises the following components in percentage by mass: caF 2 20.12% of CaCO 3 7.58% of SiO 2 Is 50.01%.
The specific operation steps are that 250g of fluorite ore is ground until the content of minus 74 mu m accounts for 80%, the ground fluorite ore is added into a 0.5L flotation tank, the pH value is adjusted to 8.0 by sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 300g/t, after stirring is carried out for 5min, sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1100g/t, and the rough concentration is started.
And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate was further refined 7 times to obtain fluorite concentrate, and the refining process was the same as in example 1. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. And carrying out primary scavenging on the roughed tailings. The total amount of curdlan added in 7 selections is 80g/t.
Other flotation conditions were not changed, and only curdlan was changed to water glass to conduct a water glass dosage test as comparative example 4. The comparison results are shown in the following table:
example 5
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is low-grade dolomite fluorite ore with 36.78% of certain fluorite grade and 48.25% of dolomite grade.
The specific operation steps are that 300g of fluorite ore is ground until the content of-74 mu m accounts for 75%, the mixture is added into a 0.75L flotation tank, the pH value is adjusted to 8.0 by sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to 350g/t of curdlan/fluorite ore, the mixture is stirred for 5min, and then sodium oleate is added according to 1000g/t of sodium oleate/fluorite ore to start roughing. And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate is further refined 6 times to obtain fluorite concentrate, and the refining process is the same as in example 1. And carrying out primary scavenging operation on the roughed tailings. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. The total amount of curdlan added in 6 selections is 50g/t.
The curdlan was changed to water glass without changing other flotation conditions, and a water glass amount test was performed as comparative example 5. The comparison results are shown in the following table:
example 6
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is calcite type fluorite ore, and comprises the following components in percentage by mass: caF 2 21.5% of CaCO 3 8.2% of SiO 2 The content was 45.35%.
The specific operation steps are that 250g of fluorite ore is ground until the content of-74 mu m accounts for 80%, the mixture is added into a 0.5L flotation tank, the pH value is adjusted to 9 by sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 300g/t, the mixture is stirred for 5min, and then sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1200g/t to start roughing. And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate was further refined 8 times to obtain fluorite concentrate, and the refining process was the same as in example 1. And carrying out two scavenging operations on the roughed tailings. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. The total amount of curdlan added in 8 selections was 95g/t. Other flotation conditions were not changed and only the curdlan was changed to water glass, and a water glass amount test was performed as comparative example 6. The comparison results are shown in the following table:
example 7
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is low-grade dolomite fluorite ore with 40.10% of certain fluorite grade and 50.23% of dolomite grade. The specific operation steps are that 1000g of fluorite ore is ground until the content of-74 mu m accounts for 85%, the mixture is added into a 3L flotation tank, the pH value is adjusted to 8.0 by using sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 400g/t, the mixture is stirred for 5min, and then sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1000g/t, and the rough concentration is started. And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate was further refined 6 times to obtain fluorite concentrate, and the refining process was the same as in example 1. And carrying out primary scavenging operation on the roughed tailings. Only the aqueous solution of sodium hydroxide of curdlan was added in the concentration operation. The total amount of curdlan added in 6 selections is 90g/t. Other flotation conditions were not changed and only the curdlan was changed to water glass, and a water glass amount test was performed as comparative example 7. The comparative results are shown in the following table:
example 8
Curdlan is prepared into 1 percent of sodium hydroxide aqueous solution of curdlan.
The fluorite ore used in the embodiment is calcite type fluorite ore, and comprises the following components in percentage by mass: caF 2 16.21% of CaCO 3 10.52% of SiO 2 It was 50.03%.
The specific operation steps are that 500g of fluorite ore is ground until the content of-74 mu m accounts for 75%, the mixture is added into a 1.5L flotation tank, the pH value is adjusted to 8.0 by sodium carbonate, sodium hydroxide aqueous solution of curdlan is added according to the condition that the curdlan/fluorite ore is 400g/t, after stirring for 5min, sodium oleate is added according to the condition that the sodium oleate/fluorite ore is 1000g/t, and rough concentration is started. And roughing concentrate and roughing tailings are obtained through roughing. The rougher concentrate was further refined 8 times to obtain fluorite concentrate, and the refining process was the same as in example 1. And carrying out primary scavenging operation on the rougher tailings. Only the aqueous sodium hydroxide solution of curdlan was added to the beneficiation. The total amount of curdlan added in 8 selections is 100g/t.
The curdlan was changed to water glass without changing other flotation conditions, and a water glass amount test was performed as comparative example 8. The comparison results are shown in the following table:
Claims (10)
1. the application of curdlan as an inhibitor in fluorite ore flotation is characterized in that curdlan is added as an inhibitor in the fluorite ore flotation process.
2. Use of curdlan as an inhibitor in the flotation of fluorite ores according to claim 1, wherein the fluorite ores are dolomite-type fluorite ores and/or calcite-type fluorite ores.
3. Use of curdlan as an inhibitor in fluorite ore flotation according to claim 1, characterised in that curdlan is used as an inhibitor in the rougher and cleaner stages of fluorite flotation.
4. The use of curdlan as an inhibitor in fluorite ore flotation according to claim 1, wherein the curdlan is prepared into a sodium hydroxide aqueous solution with the mass concentration of 0.5-2% for use.
5. An application method of curdlan as an inhibitor in fluorite ore flotation is characterized by comprising the steps of size mixing, pH adjusting, adding sodium hydroxide aqueous solution of curdlan and a collecting agent, carrying out fluorite flotation operation, and separating out fluorite concentrate and final tailings, wherein the final tailings are dolomite and/or calcite.
6. The method of applying curdlan as an inhibitor in fluorite ore flotation according to claim 5 wherein the flotation operation comprises: roughing, namely roughing to obtain roughing concentrate and roughing tailings, adding the roughing concentrate into a sodium hydroxide aqueous solution of curdlan again for first concentration to obtain first concentrated concentrate and first concentrated tailings; adding the curdlan sodium hydroxide aqueous solution into the first concentrated concentrate again to continue to carry out second concentration to obtain second concentrated concentrate and second concentrated tailings; returning the secondary concentrated tailings to the previous concentration operation, and adding the secondary concentrated concentrate into the sodium hydroxide aqueous solution of curdlan again to perform the next concentration operation; repeating the fine concentration for 6-8 times to obtain fluorite concentrate;
performing primary scavenging operation on the roughing tailings, performing primary scavenging to obtain primary scavenging concentrate and primary scavenging tailings, and returning the primary scavenging concentrate and the primary concentrating tailings to the roughing operation; and performing secondary scavenging on the primary scavenged tailings, obtaining secondary scavenged concentrate and final tailings by the secondary scavenging, and returning the secondary scavenged concentrate to the primary scavenging operation.
7. The application method of curdlan as the inhibitor in fluorite ore flotation according to claim 5, characterized in that the pulp mixing adopts fluorite raw ore with fineness of-74 μm accounting for 60% -80%;
and/or the pH value is adjusted to 7-9 by adopting sodium carbonate.
8. The method for applying curdlan as an inhibitor in fluorite ore flotation according to claim 5, wherein the collecting agent is added, the collecting agent is sodium oleate, and the adding amount of the collecting agent per ton of fluorite ore is 800-1500g;
and/or in the flotation process, the total dosage of the curdlan is 400-500g per ton of fluorite, 300-400g per ton of the curdlan is added in the roughing stage, and 30-100g per ton of the fluorite is added in the concentrating stage.
9. The method for applying curdlan as an inhibitor in fluorite ore flotation according to claim 6, wherein the sodium hydroxide aqueous solution of curdlan accounts for 15-20% of the mass of the curdlan, the curdlan and the sodium hydroxide are taken, the sodium hydroxide is firstly dissolved in water, and then the curdlan is added to obtain a mixed solution; heating the mixed solution to 80-90 deg.C, stirring at constant temperature for 10-20min, and diluting with water to obtain curdlan sodium hydroxide aqueous solution with mass concentration of 0.5-2%.
10. The method of claim 6, wherein the concentration is performed 6-8 times and the scavenging is performed 1-2 times.
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