CN115254440B - Application of curdlan as inhibitor in fluorite ore floatation and application method thereof - Google Patents
Application of curdlan as inhibitor in fluorite ore floatation and application method thereof Download PDFInfo
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- CN115254440B CN115254440B CN202210949600.7A CN202210949600A CN115254440B CN 115254440 B CN115254440 B CN 115254440B CN 202210949600 A CN202210949600 A CN 202210949600A CN 115254440 B CN115254440 B CN 115254440B
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- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 130
- 239000010436 fluorite Substances 0.000 title claims abstract description 130
- 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 127
- 229920002558 Curdlan Polymers 0.000 title claims abstract description 126
- 239000001879 Curdlan Substances 0.000 title claims abstract description 126
- 229940078035 curdlan Drugs 0.000 title claims abstract description 126
- 235000019316 curdlan Nutrition 0.000 title claims abstract description 126
- 239000003112 inhibitor Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 29
- 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 20
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 20
- 229910021532 Calcite Inorganic materials 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 230000002000 scavenging effect Effects 0.000 claims description 42
- 238000005188 flotation Methods 0.000 claims description 37
- 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
- 238000003756 stirring Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 15
- 239000011707 mineral Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 238000010979 pH adjustment Methods 0.000 abstract description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 19
- 235000019353 potassium silicate Nutrition 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 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
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002537 cosmetic Substances 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
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-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
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001875 compounds Chemical class 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
- 239000003906 humectant Substances 0.000 description 1
- 150000002433 hydrophilic molecules Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920000642 polymer Polymers 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
- 239000003381 stabilizer 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
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—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 floatation and an application method thereof belong to the technical field of fluorite ore floatation. The application adopts the curdlan as an inhibitor in fluorite ore floatation, and the application method comprises the steps of pulp adjustment, pH adjustment, addition of sodium hydroxide aqueous solution of the curdlan and a collector, and fluorite floatation operation to obtain fluorite concentrate and tailings. The curdlan is used as an inhibitor in fluorite ore floatation, has better inhibition effect, lower dosage and degradability, and is environment-friendly, and calcite and dolomite minerals can be selectively inhibited in fluorite ore floatation, so that separation of fluorite and calcite and dolomite is realized.
Description
Technical Field
The invention belongs to the technical field of fluorite ore floatation, and particularly relates to application of curdlan as an inhibitor in fluorite ore floatation and an application method thereof.
Background
Fluorite, also known as fluorite, which is one of the important sources of fluorine is a mineral commonly found in nature, often intergrowth with dolomite and calcite, and their floatability is similar. Therefore, in the flotation separation process, inhibitors are required to be added so as to effectively separate fluorite from dolomite and calcite. At present, the most common flotation inhibitor in industry is water glass or modified water glass, and the dosage of the flotation inhibitor is large. And the strong alkalinity of the ore pulp makes it easy to cause water pollution.
The curdlan is a linear polysaccharide polymer formed by 400-500D-glucose residues through beta-1, 3-D-glucosidic bonds, has no branched structure, has wide application, can replace glucan as a filler in a column, and achieves better separation effect. The mixture prepared from the curdlan and the activated carbon can effectively remove heavy metal elements in the Chinese herbal medicine, and is particularly beneficial to the development of traditional Chinese medicines; and are also effective in the cosmetic industry as thickeners, suspending agents, stabilizers, humectants, and rheology modifiers, and thus can be used in various types of cosmetics. In the field of mineral processing, there are compounds used as hematite inhibitors. CN 113477408A discloses an application of curdlan as an inhibitor in reverse flotation of iron ore in the field of mineral processing and an application method thereof, wherein gangue minerals such as hematite and quartz are separated from the ore, and through selective adsorption of curdlan on the surface of hematite, the hydrophilicity of hematite is increased, the floatability is reduced, and the floatability of the gangue minerals such as quartz is not affected, so that iron minerals can be enriched from the gangue minerals. However, calcium-containing mineral systems are not yet applied in the flotation separation of calcium-containing minerals, unlike iron ore flotation systems, because the mineral surfaces are all calcium-containing ions, which in turn are sites of interaction with the affinity groups of the agents, making it extremely difficult to find effective inhibitors.
The mineral properties of the existing fluorite are more and more complex, the commonly used inhibitor is large in dosage, the inhibition effect is poor, and the environment is not friendly.
Disclosure of Invention
The invention aims to provide an application of curdlan as an inhibitor in fluorite ore floatation and an application method thereof, wherein the curdlan is adopted as the inhibitor in fluorite ore floatation, so that the curdlan has better inhibition effect, lower dosage and degradability, and is environment-friendly, calcite and dolomite minerals can be selectively inhibited in fluorite ore floatation, and separation of fluorite and calcite and dolomite mountain is realized.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The application of the curdlan as an inhibitor in fluorite ore floatation is as follows: in the fluorite ore floatation process, curdlan is added.
The curdlan is used as an inhibitor of dolomite and calcite in fluorite flotation, so that separation of fluorite from dolomite and calcite is realized.
The curdlan is used as an inhibitor in fluorite ore floatation, and the adopted fluorite ore is dolomite type fluorite ore and/or calcite type fluorite ore.
The application of the curdlan as an inhibitor in fluorite ore flotation is that the curdlan is applied to a roughing stage and a concentrating stage of fluorite flotation as the inhibitor.
The curdlan is used as an inhibitor in fluorite ore floatation, and is prepared into sodium hydroxide aqueous solution with mass concentration of 0.5-2% for use.
The application method of the curdlan serving as an inhibitor in fluorite ore floatation comprises the steps of pulp adjustment, pH adjustment, addition of sodium hydroxide aqueous solution of the curdlan and a collector, and fluorite floatation operation:
The flotation operation comprises the following steps: firstly roughing, namely roughing to obtain roughing concentrate and roughing tailings, and adding sodium hydroxide aqueous solution of curdlan into the roughing concentrate again to perform primary concentration to obtain primary concentration concentrate and primary concentration tailings; adding sodium hydroxide aqueous solution of curdlan again into the primary concentrate for secondary concentration to obtain secondary concentrate and secondary tailings; the secondary concentrating tailings return to the previous concentrating operation, and the secondary concentrating concentrate is added with sodium hydroxide aqueous solution of curdlan again to carry out the next concentrating operation; repeatedly concentrating for 6-8 times to obtain fluorite concentrate;
The roughing tailings are subjected to primary scavenging operation, primary scavenging concentrate and primary scavenging tailings are obtained through primary scavenging, and primary scavenging concentrate and primary concentrating tailings return to the roughing operation; and (3) carrying out secondary scavenging on the primary scavenging tailings, obtaining secondary scavenging concentrate and final tailings through secondary scavenging, and returning the secondary scavenging concentrate to primary scavenging operation.
The final tailings are gangue mainly comprising dolomite and/or calcite.
The fineness of fluorite raw ore adopted in the size mixing is-74 mu m, and the proportion is 60% -80%.
The pH value is adjusted to 7-9 by sodium carbonate.
The collecting agent is added, sodium oleate is selected as the collecting agent, and 800-1500g of collecting agent is added per ton of fluorite ore.
In the flotation process, the total consumption of the curdlan is 400-500g per ton of fluorite, wherein the rough concentration stage is 300-400g/t, and the total consumption of the curdlan added in the fine concentration stage is 30-100g/t.
The sodium hydroxide aqueous solution of the curdlan accounts for 15-20% of the mass of the curdlan according to the mass of sodium hydroxide; dissolving sodium hydroxide in water, and then adding the curdlan to obtain a mixed solution; heating the mixed solution to 80-90 ℃, stirring at constant temperature for 10-20min, and then adding water to dilute the mixed solution into the aqueous solution of the curdlan sodium hydroxide with the mass concentration of 0.5-2% of the curdlan.
In the rough concentration stage, the curdlan is added according to 300-400g per ton of fluorite ore, and in the concentration stage, the curdlan is added according to 30-100g per ton of fluorite ore.
Further, the selection times are 6-8 times, and the scavenging times are 1-2 times.
The technical key points of the invention are as follows:
The curdlan is polymerized by glucose monomer, contains a large amount of hydroxyl groups, is not only hydrophilic group but also hydrophilic group, and can generate carboxyl when being prepared by alkali liquor, so that stronger adsorption effect is generated on gangue such as litholysis, dolomite and the like. In addition, the curdlan itself is a hydrophilic compound. This further expands the floatability difference between gangue minerals and target minerals, thereby enriching fluorite.
The application of the curdlan as an inhibitor in fluorite ore floatation and the application method thereof have the beneficial effects that:
In the invention, the difference of adsorption capacities of dolomite, calcite and fluorite is utilized to enrich the fluorite ore. (i.e., it selectively adsorbs onto the dolomite and calcite surfaces to enhance their hydrophilicity; while fluorite still reacts with sodium oleate to enhance its hydrophobicity). The invention mainly utilizes the difference of hydrophobicity of three minerals to recover fluorite resources.
The product has the advantages that:
(1) The method uses the curdlan as the fluorite flotation inhibitor for the first time, and has great significance for the efficient development and utilization of fluorite resources;
(2) Compared with water glass, the amount of the available natural rubber is small, and the selectivity is high;
(3) The curdlan is easy to degrade, has no pollution and is an environment-friendly inhibitor.
Drawings
FIG. 1 is a fluorite flotation process.
Detailed Description
The present invention will be described in further detail with reference to examples.
The aqueous sodium hydroxide solutions of curdlan used in the following examples were prepared by the following methods:
10g of curdlan and 2g of sodium hydroxide are taken, 200mL of water is taken to dissolve the sodium hydroxide, then the curdlan is added, the mixture is placed in a water bath kettle to be heated to 90 ℃ and stirred for 15min at constant temperature, and then water is added to fix the volume to obtain 1% of sodium hydroxide aqueous solution of the curdlan.
The fluorite flotation flow of the following example is shown in figure 1.
Example 1
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is calcite type fluorite ore, and contains the following components in percentage by mass: caF 2.2%, caCO 3 5.1%, siO 2 51.23%.
The specific operation steps are as follows: firstly, 300g of fluorite ore is ground until the content of-74 mu m is 75%, the fluorite ore is added into a 0.75L flotation tank, the pH value of ore pulp is regulated to 8.5 by sodium carbonate, sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 200g/t of the curdlan/fluorite ore, the mixture is stirred for 5min, and then sodium oleate is added according to the ratio of 1000g/t of the sodium oleate/fluorite ore to start roughing. And obtaining roughing concentrate and roughing tailings through roughing. Adding sodium hydroxide aqueous solution of curdlan into the roughing concentrate again for primary concentration to obtain primary concentration concentrate and primary concentration tailings; adding sodium hydroxide aqueous solution of curdlan again into the primary concentrate for secondary concentration to obtain secondary concentrate and secondary tailings; the secondary concentrating tailings return to the previous concentrating operation, and the secondary concentrating concentrate is added with sodium hydroxide aqueous solution of curdlan again to carry out the next concentrating operation; and continuously and repeatedly carrying out concentration for 6 times to obtain fluorite concentrate. And scavenging the rougher tailings once. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 6 times of carefully selecting is 90g/t. Other flotation conditions were unchanged, and only the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 1. The comparison results are shown in the following table:
Example 2
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is calcite type fluorite ore, and contains the following components in percentage by mass: caF 2 was 19.2%, caCO 3 was 7.1%, and SiO 2 was 49.23%.
The specific operation steps are that 300g of fluorite ore is ground until the content of-74 mu m is 80%, the fluorite ore is added into a 0.75L flotation tank, the pH value is regulated to 8.5 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the condition that the content of the curdlan/fluorite ore is 250g/t, and after stirring for 5min, the sodium oleate is added according to the condition that the content of the sodium oleate/fluorite ore is 1000g/t, and rough separation is started. And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 8 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. And scavenging the rougher tailings once. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 8 times of carefully selecting is 90g/t.
Other flotation conditions were unchanged, and only the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 2. The comparison results are shown in the following table:
Example 3
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example was a low-grade dolomite fluorite ore having 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 is 85%, the fluorite ore is added into a 0.75L flotation tank, the pH value is regulated to 8.5 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 300g/t of the curdlan/fluorite ore, and after stirring for 5min, the sodium oleate is added according to the ratio of 1000g/t of the sodium oleate/fluorite ore, and rough separation is started.
And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 8 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. The roughing tailings are subjected to twice scavenging, and the method specifically comprises the following steps: the roughing tailings are subjected to primary scavenging operation, primary scavenging concentrate and primary scavenging tailings are obtained through primary scavenging, and primary scavenging concentrate and primary concentrating tailings return to the roughing operation; and (3) carrying out secondary scavenging on the primary scavenging tailings, obtaining secondary scavenging concentrate and final tailings by the secondary scavenging, returning the secondary scavenging concentrate to the primary scavenging operation, and adding sodium hydroxide aqueous solution of the curdlan only in the concentration operation. The total amount of the curdlan added for 8 times of carefully selecting is 100g/t.
Other flotation conditions were unchanged, and only the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 3. The comparison results are shown in the following table:
Example 4
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is calcite type fluorite ore, and contains the following components in percentage by mass: caF 2 is 20.12%, caCO 3 is 7.58%, siO 2 is 50.01%.
The specific operation steps are that 250g of fluorite ore is ground until the content of-74 mu m is 80%, the fluorite ore is added into a 0.5L flotation tank, the pH value is regulated to 8.0 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 300g/t of the curdlan/fluorite ore, and after stirring for 5min, the sodium oleate is added according to the ratio of 1100g/t of the sodium oleate/fluorite ore, and rough separation is started.
And obtaining roughing concentrate and roughing tailings through roughing. The roughing concentrate was further concentrated 7 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. And scavenging the rougher tailings once. The total amount of the curdlan added for 7 times of carefully selecting is 80g/t.
Other flotation conditions were unchanged, and only the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 4. The comparison results are shown in the following table:
Example 5
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is a low-grade dolomite type fluorite ore with a fluorite grade of 36.78% and a dolomite grade of 48.25%.
The specific operation steps are that 300g of fluorite ore is ground until the content of-74 mu m is 75%, the fluorite ore is added into a 0.75L flotation tank, the pH value is regulated to 8.0 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the condition that the content of the curdlan/fluorite ore is 350g/t, and after stirring for 5min, the sodium oleate is added according to the condition that the content of the sodium oleate/fluorite ore is 1000g/t, and rough separation is started. And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 6 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. And (5) carrying out primary scavenging operation on the roughing tailings. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 6 times of carefully selecting is 50g/t.
Other flotation conditions were unchanged, and the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 5. The comparison results are shown in the following table:
Example 6
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is calcite type fluorite ore, and contains the following components in percentage by mass: caF 2 is 21.5%, caCO 3 is 8.2%, and SiO 2 is 45.35%.
The specific operation steps are that 250g of fluorite ore is ground until the content of-74 mu m is 80%, the fluorite ore is added into a 0.5L flotation tank, the pH value is regulated to 9 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 300g/t of the curdlan/fluorite ore, and after stirring for 5min, the sodium oleate is added according to the ratio of 1200g/t of the sodium oleate/fluorite ore, and rough separation is started. And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 8 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. And (5) performing twice scavenging operation on the roughing tailings. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 8 times of carefully selecting is 95g/t. Other flotation conditions were unchanged, and the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 6. The comparison results are shown in the following table:
example 7
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example was a low-grade dolomite fluorite ore having a fluorite grade of 40.10% and a dolomite grade of 50.23%. The specific operation steps are that 1000g of fluorite ore is ground until the content of-74 mu m is 85%, the fluorite ore is added into a 3L flotation tank, the pH value is regulated to 8.0 by sodium carbonate, sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 400g/t of the curdlan/fluorite ore, and after stirring for 5min, sodium oleate is added according to the ratio of 1000g/t of the sodium oleate/fluorite ore, and rough separation is started. And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 6 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. And (5) carrying out primary scavenging operation on the roughing tailings. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 6 times of carefully selecting is 90g/t. Other flotation conditions were unchanged, and the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 7. The comparison results are shown in the following table:
Example 8
The curdlan is prepared into a sodium hydroxide aqueous solution of 1% curdlan.
The fluorite ore used in this example is calcite type fluorite ore, and contains the following components in percentage by mass: caF 2 was 16.21%, caCO 3 was 10.52%, and SiO 2 was 50.03%.
The specific operation steps are that 500g of fluorite ore is ground until the content of-74 mu m is 75%, the fluorite ore is added into a 1.5L flotation tank, the pH value is regulated to 8.0 by sodium carbonate, the sodium hydroxide aqueous solution of the curdlan is added according to the ratio of 400g/t of the curdlan/fluorite ore, and after stirring for 5min, the sodium oleate is added according to the ratio of 1000g/t of the sodium oleate/fluorite ore, and rough separation is started. And obtaining roughing concentrate and roughing tailings through roughing. The rough concentrate was further concentrated 8 times to obtain fluorite concentrate, and the concentration process was the same as in example 1. And (5) carrying out primary scavenging operation on the roughing tailings. The concentration operation only adds sodium hydroxide aqueous solution of curdlan. The total amount of the curdlan added for 8 times of carefully selecting is 100g/t.
Other flotation conditions were unchanged, and the curdlan was changed to water glass, and a water glass dosage test was performed as comparative example 8. The comparison results are shown in the following table:
Claims (9)
1. The application of the curdlan as an inhibitor in fluorite ore floatation is characterized in that the curdlan is added as the inhibitor in the fluorite ore floatation process.
2. Use of curdlan as claimed in claim 1 as an inhibitor in fluorite ore flotation, wherein the fluorite ore is dolomite-type fluorite ore and/or calcite-type fluorite ore.
3. The use of curdlan as an inhibitor in fluorite flotation according to claim 1, characterized in that curdlan is used as an inhibitor in the roughing and refining stages of fluorite flotation.
4. The use of curdlan as an inhibitor in fluorite ore flotation according to claim 1, characterized in that curdlan is formulated into aqueous sodium hydroxide solution of curdlan with a mass concentration of 0.5-2%.
5. The application method of the curdlan as an inhibitor in fluorite ore floatation is characterized by comprising the steps of pulp mixing, pH value adjustment, adding a sodium hydroxide aqueous solution of the curdlan and a collector, performing fluorite floatation operation, and separating fluorite concentrate and final tailings, wherein the final tailings are dolomite and/or calcite.
6. The method of using curdlan as an inhibitor in fluorite ore flotation according to claim 5, wherein the flotation operation comprises: firstly roughing, namely roughing to obtain roughing concentrate and roughing tailings, and adding sodium hydroxide aqueous solution of curdlan into the roughing concentrate again to perform primary concentration to obtain primary concentration concentrate and primary concentration tailings; adding sodium hydroxide aqueous solution of curdlan again into the primary concentrate for secondary concentration to obtain secondary concentrate and secondary tailings; the secondary concentrating tailings return to the previous concentrating operation, and the secondary concentrating concentrate is added with sodium hydroxide aqueous solution of curdlan again to carry out the next concentrating operation; repeatedly concentrating for 6-8 times to obtain fluorite concentrate;
The roughing tailings are subjected to primary scavenging operation, primary scavenging concentrate and primary scavenging tailings are obtained through primary scavenging, and primary scavenging concentrate and primary concentrating tailings return to the roughing operation; and (3) carrying out secondary scavenging on the primary scavenging tailings, obtaining secondary scavenging concentrate and final tailings through secondary scavenging, and returning the secondary scavenging concentrate to primary scavenging operation.
7. The method for using curdlan as an inhibitor in fluorite ore floatation according to claim 5, wherein the size mixing is carried out by adopting fluorite raw ore 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 using the curdlan as an inhibitor in fluorite ore floatation according to claim 5, wherein the collector is sodium oleate, and the collector is added in an amount of 800-1500g per ton of fluorite ore;
And/or, the total consumption of the curdlan is 400-500g per ton of fluorite in the flotation process, 300-400g per ton of fluorite ore is added in the rough separation stage, and 30-100g per ton of fluorite ore is added in the fine separation stage.
9. The method for using the curdlan as an inhibitor in fluorite ore floatation, according to claim 6, wherein the sodium hydroxide aqueous solution of the curdlan is prepared by dissolving sodium hydroxide in water firstly according to the mass of 15-20% of the mass of the curdlan and then adding the curdlan to obtain a mixed solution; heating the mixed solution to 80-90 ℃, stirring at constant temperature for 10-20min, and then adding water to dilute the mixed solution into the aqueous solution of the curdlan sodium hydroxide with the mass concentration of 0.5-2% of the curdlan.
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| GB1571106A (en) * | 1976-07-16 | 1980-07-09 | Chem Y | Ore flotation process for the recovery of fluoride minerals and rare earth carbonates |
| CN102151615B (en) * | 2010-12-21 | 2013-01-16 | 北京矿冶研究总院 | Fluorite flotation method in high-salinity alkaline water environment |
| CN102658242B (en) * | 2012-04-25 | 2013-06-19 | 白银有色集团股份有限公司 | Mineral separation process of complex fluorite difficult to separate |
| CN103521344A (en) * | 2013-10-24 | 2014-01-22 | 务川东升矿业有限责任公司 | Method for separating and purifying low-grade fluorite barite paragenetic ores |
| CN103897073B (en) * | 2014-03-12 | 2016-02-10 | 山东省食品发酵工业研究设计院 | A kind of method utilizing flocculation agent separation and purification curdlan |
| CN108043589B (en) * | 2017-12-06 | 2019-12-24 | 中南大学 | Application of polyaspartic acid in fluorite ore flotation |
| CN109174466A (en) * | 2018-09-05 | 2019-01-11 | 中南大学 | The inhibitor and its preparation method and application of calcic gangue in a kind of Scheelite Flotation |
| CN113477408B (en) * | 2021-07-21 | 2022-08-02 | 东北大学 | Application of curdlan serving as inhibitor in iron ore reverse flotation in mineral processing field and application method |
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