CN114713364B - Method for recovering lepidolite concentrate from lepidolite beneficiation tail mud - Google Patents
Method for recovering lepidolite concentrate from lepidolite beneficiation tail mud Download PDFInfo
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- 239000012141 concentrate Substances 0.000 title claims abstract description 79
- 229910052629 lepidolite Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 23
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 132
- 238000003756 stirring Methods 0.000 claims abstract description 97
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 66
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 66
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 66
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 66
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 45
- 239000011707 mineral Substances 0.000 claims abstract description 45
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 66
- 238000005188 flotation Methods 0.000 claims description 57
- 230000002000 scavenging effect Effects 0.000 claims description 56
- 238000007790 scraping Methods 0.000 claims description 35
- 239000006260 foam Substances 0.000 claims description 22
- 238000005273 aeration Methods 0.000 claims description 21
- 239000003814 drug Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 4
- 235000017550 sodium carbonate Nutrition 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 7
- 229910001947 lithium oxide Inorganic materials 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- -1 compound amine Chemical class 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010926 waste battery Substances 0.000 description 1
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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for recovering lepidolite concentrate from lepidolite beneficiation tail mud, which belongs to the technical field of separation beneficiation, and comprises the following steps: the lepidolite ore dressing tail mud is concentrated by a concentrator and then is sent to a stirring tank, clear water is added to regulate the concentration of ore pulp, meanwhile, the ore pulp is heated, sodium carbonate, water glass, sodium hexametaphosphate and a collector are sequentially added, lepidolite ore concentrate is floated by a process of one coarse process and two fine processes, and the final tailings after floatation are concentrated and filtered to obtain a mineral mud product.
Description
Technical Field
The invention belongs to the technical field of separation and mineral separation, and particularly relates to a method for recovering lepidolite concentrate from lepidolite mineral separation tail mud.
Background
With the shortage of energy and the environmental protection of the world, the worldwide carbon neutralization age comes, the carbon neutralization targets are clearly defined in various countries, the lithium battery is widely applied to the electric automobile industry by the special performance advantages of the lithium battery, and becomes one of the main power supplies of the electric automobile, the China is the largest production and manufacturing base of the lithium battery in the world, the second largest production country and the export country of the lithium battery occupy 40% of the market share of the world, the Jiangxi Yichun region takes the preemptive machine by the great-reserve lepidolite resource of the Jiangxi region, the Asian lithium is firstly laid out, the full-industry chain closed loop of lithium mining, lepidolite mineral dressing, lithium salt smelting, lithium battery manufacturing, electric automobile manufacturing and waste battery recycling is currently formed.
The ore is crushed and crushed inevitably in the process of ore grinding in a lepidolite ore dressing plant to produce ore slurry, and the primary ore slurry in the ore is added, so that the influence of the ore slurry on the floatation index of the lepidolite is extremely large in the ore dressing process of the lepidolite, and even the ore dressing process is completely destroyed, the lepidolite ore is removed by adopting classification equipment before the ore dressing in the ore dressing process to form a ore slurry product, the taste of lithium oxide in the ore slurry of the part is between 0.35 and 0.55 percent, the yield of the ore slurry product accounts for about 25 percent of the raw ore treated in the ore dressing plant, and the lepidolite ore in the ore slurry is difficult to recover because the floatation of the ore slurry is a difficult problem in ore dressing. At present, the lepidolite ore dressing plant is sold with the ore slurry as the low-end ceramic raw material, so that the lepidolite mineral resources are wasted greatly.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for recovering lepidolite concentrate from lepidolite beneficiation tail mud, which comprises the following steps:
1) Concentrating ore slurry in the production process of a mineral dressing plant by a concentrator, pumping the ore slurry to a stirring tank 1 before flotation operation, regulating the concentration of the ore slurry to be 25% by a clear water pipe, adding a ore slurry dispersing agent sodium carbonate and water glass, allowing the ore slurry to flow into a stirring tank 2 after the medicament and the mineral fully act, adding sodium hexametaphosphate, allowing the ore slurry to flow into a stirring tank 3 after the medicament and the mineral fully act, adding a collecting agent into the stirring tank 3, allowing the medicament and the mineral to flow into a roughing flotation machine automatically after the medicament and the mineral fully act, and performing air flotation and foam scraping to obtain roughing ore concentrate, wherein the product in the tank is roughing tailings;
2) First carefully selecting: adding the roughing concentrate into a concentration flotation machine 1, adding sodium carbonate and sodium hexametaphosphate simultaneously, stirring thoroughly, adding a collector, stirring continuously, and then performing aeration scraping flotation to obtain the first concentration concentrate, wherein the product in the tank returns to roughing;
3) Second carefully selecting: adding the first-time fine concentrate into a fine flotation machine 2, adding sodium carbonate and sodium hexametaphosphate at the same time, and performing aeration, scraping and flotation to obtain lepidolite concentrate, wherein the product in the tank returns to the fine flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, stirring thoroughly, adding a collector, continuing stirring, and then aerating and scraping to obtain first scavenging concentrate, wherein the first scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the aeration, adding sodium carbonate and sodium hexametaphosphate, stirring thoroughly, adding a collector, continuing stirring, and then aerating and scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and tailings in the tank are the final tailings of floatation.
Preferably, the stirring tank 1, the stirring tank 2 and the stirring tank 3 in the step 1) are heated by using steam, the steam boiler sends the steam into the stirring tank through a pipeline to heat ore pulp in the tank respectively, the temperature of the ore pulp in the stirring tank 1 is kept at 30-35 ℃, the temperature of the ore pulp in the stirring tank 2 is kept at 35-40 ℃, and the temperature of the ore pulp in the stirring tank 3 is kept at 40-45 ℃.
Preferably, in the step 1), the dosage of sodium carbonate is 190-210g/t, the dosage of sodium silicate is 285-315g/t, the dosage of sodium hexametaphosphate is 480-520g/t, the collector is a composite amine collector, and the dosage is 830-860g/t.
Preferably, the sodium carbonate in step 2) is used in an amount of 28-32g/t and sodium hexametaphosphate in an amount of 47-53g/t.
Preferably, the sodium carbonate in step 3) is used in an amount of 28-32g/t and sodium hexametaphosphate in an amount of 47-53g/t.
Preferably, the sodium carbonate in the step 4) is used in an amount of 45-55g/t, the sodium hexametaphosphate is used in an amount of 95-105g/t, and the collector is used in an amount of 240-260g/t.
Preferably, the sodium carbonate in the step 5) is used in an amount of 28-32g/t, the sodium hexametaphosphate is used in an amount of 47-53g/t, and the collector is used in an amount of 240-260g/t.
Through detection, after the method is used, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 2.31%, and the recovery rate of lithium oxide reaches 76.99%.
Compared with the prior art, the invention has the beneficial effects that:
1. the method of the invention uses steam to heat the ore pulp, so that the temperature of the ore pulp is kept at 40-45 ℃, the floatability of fine minerals in the ore pulp is improved, and meanwhile, the viscosity of the ore pulp can be reduced, and the dispersion of air in the ore pulp is facilitated; the temperature of ore pulp is increased to improve and activate the surface state of minerals, improve the adsorption capacity of the collector and shorten the floatation time of minerals.
2. The method adopts the thin pulp flotation, so that the pollution of gangue slimes in ore pulp to lepidolite ore concentrate foam during flotation can be avoided as much as possible, and the concentration of ore pulp can be reduced.
3. The method has simple process, is suitable for large-scale production, and has higher economic benefit.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
1) Concentrating ore slurry in the production process of a mineral dressing plant by a concentrator, pumping the ore slurry to a stirring tank 1 before flotation operation, regulating the concentration of the ore slurry to 25% by a clear water pipe, heating the stirring tank 1 by steam to enable the temperature of the ore slurry to be 33 ℃, then adding a ore slurry dispersing agent sodium carbonate and water glass, wherein the dosage of the sodium carbonate is 200g/t, the dosage of the water glass is 300g/t, enabling the ore slurry to flow into a stirring tank 2 after the medicament and the mineral fully act, heating the stirring tank 2 by steam to enable the temperature of the ore slurry to be 38 ℃, simultaneously adding sodium hexametaphosphate, enabling the dosage of the sodium hexametaphosphate to be 500g/t, enabling the ore slurry to flow into a stirring tank 3 after the medicament and the mineral fully act, heating the stirring tank 3 by steam to enable the temperature of the ore slurry to be 44 ℃, adding a compound amine collector into the stirring tank 3, enabling the dosage of the collector to be 850g/t, and enabling the medicament and the mineral to flow into a roughing flotation machine after the full acting, and carrying out air-filling flotation and foam scraping to obtain roughing tailings;
2) First carefully selecting: adding roughing concentrate into a concentration flotation machine 1, simultaneously adding sodium carbonate and sodium hexametaphosphate, wherein the dosage of sodium carbonate is 30g/t, the dosage of sodium hexametaphosphate is 50g/t, adding a collector after stirring fully, continuing stirring, and then performing aeration foam scraping flotation to obtain first-time concentration concentrate, and returning the product in the tank to roughing;
3) Second carefully selecting: adding the first-time concentrate into a concentration flotation machine 2, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of the sodium carbonate is 30g/t, and the dosage of the sodium hexametaphosphate is 50g/t, performing aeration scraping flotation to obtain lepidolite concentrate, and returning the product in the tank to the concentration flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, wherein the dosage of sodium carbonate is 50g/t, the dosage of sodium hexametaphosphate is 100g/t, adding a collector after stirring fully, continuing stirring, and then carrying out aeration and foam scraping to obtain first-time scavenging concentrate, wherein the first-time scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the air charging, adding 30g/t of sodium carbonate and 50g/t of sodium hexametaphosphate, stirring thoroughly, adding a collector, stirring continuously, 250g/t of the collector, and then carrying out air charging and foam scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and the tailings in the tank are the final tailings of the floatation.
Through detection, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 2.29%, and the recovery rate of lithium oxide reaches 76.35%.
Example 2
1) Concentrating the ore slurry in the production process of a mineral dressing plant by a concentrator, pumping the ore slurry to a stirring tank 1 before flotation operation, regulating the concentration of the ore slurry to 25% by a clear water pipe, heating the stirring tank 1 by steam to enable the temperature of the ore slurry to be 33 ℃, then adding a ore slurry dispersing agent sodium carbonate and water glass, wherein the dosage of the sodium carbonate is 195g/t, the dosage of the water glass is 302g/t, enabling the ore slurry to flow into a stirring tank 2 after the chemical and the mineral fully act, heating the stirring tank 2 by steam to enable the temperature of the ore slurry to be 38 ℃, simultaneously adding sodium hexametaphosphate, enabling the dosage of the sodium hexametaphosphate to be 490g/t, enabling the ore slurry to flow into a stirring tank 3 after the chemical and the mineral fully act, heating the stirring tank 3 by steam to enable the temperature of the ore slurry to be 44 ℃, adding a compound amine collector into the stirring tank 3, enabling the dosage of the collector to be 855g/t, enabling the chemical and the mineral to flow into a roughing flotation machine after the chemical and the mineral fully act, and carrying out inflation flotation and foam scraping, so as to obtain roughing tailings;
2) First carefully selecting: adding roughing concentrate into a concentration flotation machine 1, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of sodium carbonate is 29g/t, the dosage of sodium hexametaphosphate is 49g/t, adding a collector after stirring fully, continuing stirring, and then performing aeration foam scraping flotation to obtain first-time concentration concentrate, and returning the product in the tank to roughing;
3) Second carefully selecting: adding the first-time concentrate into a concentration flotation machine 2, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of the sodium carbonate is 30g/t, and the dosage of the sodium hexametaphosphate is 50g/t, performing aeration scraping flotation to obtain lepidolite concentrate, and returning the product in the tank to the concentration flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, wherein the dosage of sodium carbonate is 52g/t, the dosage of sodium hexametaphosphate is 105g/t, adding a collector to continuously stir after stirring is complete, and then carrying out aeration and foam scraping to obtain first-time scavenging concentrate, wherein the first-time scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the air charging, adding 30g/t of sodium carbonate and 50g/t of sodium hexametaphosphate, stirring thoroughly, adding a collector, stirring continuously, 240g/t of the collector, and then carrying out air charging and foam scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and the tailings in the tank are the final tailings of the floatation.
Through detection, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 2.27%, and the recovery rate of lithium oxide reaches 76.13%.
Example 3
1) Concentrating the ore slurry in the production process of a mineral dressing plant by a concentrator, pumping the ore slurry to a stirring tank 1 before flotation operation, regulating the concentration of the ore slurry to 25% by a clear water pipe, heating the stirring tank 1 by steam to enable the temperature of the ore slurry to be 33 ℃, then adding a ore slurry dispersing agent sodium carbonate and water glass, wherein the dosage of the sodium carbonate is 202g/t, the dosage of the water glass is 300g/t, enabling the ore slurry to flow into a stirring tank 2 after the chemical and the mineral fully act, heating the stirring tank 2 by steam to enable the temperature of the ore slurry to be 38 ℃, simultaneously adding sodium hexametaphosphate, enabling the dosage of the sodium hexametaphosphate to be 510g/t, enabling the ore slurry to flow into a stirring tank 3 after the chemical and the mineral fully act, heating the stirring tank 3 by steam to enable the temperature of the ore slurry to be 44 ℃, adding a compound amine collector into the stirring tank 3, enabling the dosage of the collector to be 845g/t, enabling the chemical and the mineral to flow into a roughing flotation machine after the chemical and the mineral fully act, and carrying out inflation flotation and foam scraping, so as to obtain roughing tailings;
2) First carefully selecting: adding roughing concentrate into a concentration flotation machine 1, simultaneously adding sodium carbonate and sodium hexametaphosphate, wherein the dosage of sodium carbonate is 30g/t, the dosage of sodium hexametaphosphate is 51g/t, adding a collector after stirring fully, continuing stirring, and then performing aeration foam scraping flotation to obtain first-time concentration concentrate, and returning the product in the tank to roughing;
3) Second carefully selecting: adding the first-time concentrate into a concentration flotation machine 2, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of the sodium carbonate is 30g/t, and the dosage of the sodium hexametaphosphate is 51g/t, performing aeration scraping flotation to obtain lepidolite concentrate, and returning the product in the tank to the concentration flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, wherein the dosage of sodium carbonate is 50g/t, the dosage of sodium hexametaphosphate is 100g/t, adding a collector after stirring fully, continuing stirring, and then carrying out aeration and foam scraping to obtain first-time scavenging concentrate, wherein the first-time scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the air charging, adding 30g/t of sodium carbonate and 50g/t of sodium hexametaphosphate, stirring thoroughly, adding a collector, stirring continuously, 240g/t of the collector, and then carrying out air charging and foam scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and the tailings in the tank are the final tailings of the floatation.
Through detection, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 2.30%, and the recovery rate of lithium oxide reaches 76.43%.
Comparative example 1
1) Concentrating the mineral slurry in the production process of a mineral dressing plant by a concentrator, pumping the concentrated mineral slurry to a stirring tank 1 before flotation operation, regulating the concentration of the mineral slurry to be 25% by a clear water pipe, adding a mineral slurry dispersing agent sodium carbonate and water glass, wherein the dosage of the sodium carbonate is 202g/t, the dosage of the water glass is 300g/t, enabling the mineral slurry to flow into a stirring tank 2 after the medicament and the mineral fully act, simultaneously adding sodium hexametaphosphate, enabling the dosage of the sodium hexametaphosphate to be 510g/t, enabling the mineral slurry to flow into a stirring tank 3 after the medicament and the mineral fully act, adding a compound amine collector, enabling the dosage of the collector to be 845g/t, enabling the medicament and the mineral to flow into the roughing flotation machine automatically, and carrying out inflation flotation and scraping to obtain roughing concentrate, wherein the product in the tank is roughing tailings;
2) First carefully selecting: adding roughing concentrate into a concentration flotation machine 1, simultaneously adding sodium carbonate and sodium hexametaphosphate, wherein the dosage of sodium carbonate is 30g/t, the dosage of sodium hexametaphosphate is 51g/t, adding a collector after stirring fully, continuing stirring, and then performing aeration foam scraping flotation to obtain first-time concentration concentrate, and returning the product in the tank to roughing;
3) Second carefully selecting: adding the first-time concentrate into a concentration flotation machine 2, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of the sodium carbonate is 30g/t, and the dosage of the sodium hexametaphosphate is 51g/t, performing aeration scraping flotation to obtain lepidolite concentrate, and returning the product in the tank to the concentration flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, wherein the dosage of sodium carbonate is 50g/t, the dosage of sodium hexametaphosphate is 100g/t, adding a collector after stirring fully, continuing stirring, and then carrying out aeration and foam scraping to obtain first-time scavenging concentrate, wherein the first-time scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the air charging, adding 30g/t of sodium carbonate and 50g/t of sodium hexametaphosphate, stirring thoroughly, adding a collector, stirring continuously, 240g/t of the collector, and then carrying out air charging and foam scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and the tailings in the tank are the final tailings of the floatation.
Through detection, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 1.82%, and the recovery rate of lithium oxide reaches 62.57%.
Comparative example 2
1) Concentrating ore slurry in the production process of a mineral dressing plant through a concentrator, then pumping the ore slurry to a stirring tank 1 before flotation operation, heating the stirring tank 1 through steam to enable the temperature of the ore slurry to reach 33 ℃, then adding a ore slurry dispersing agent sodium carbonate and water glass, wherein the dosage of the sodium carbonate is 202g/t, the dosage of the water glass is 300g/t, enabling the ore slurry to flow into a stirring tank 2 automatically after the medicament and minerals fully act, heating the stirring tank 2 through steam to enable the temperature of the ore slurry to reach 38 ℃, simultaneously adding sodium hexametaphosphate, enabling the dosage of the sodium hexametaphosphate to be 510g/t, enabling the ore slurry to flow into a stirring tank 3 after the medicament and the minerals fully act, heating the stirring tank 3 through steam to enable the temperature of the ore slurry to reach 44 ℃, adding a compound amine collector into the stirring tank 3, enabling the dosage of the collector to flow into the rougher automatically after the medicament and the minerals fully act, and carrying out air flotation and foam scraping to obtain roughing ore concentrate, wherein products in the tank are roughing tailings;
2) First carefully selecting: adding roughing concentrate into a concentration flotation machine 1, simultaneously adding sodium carbonate and sodium hexametaphosphate, wherein the dosage of sodium carbonate is 30g/t, the dosage of sodium hexametaphosphate is 51g/t, adding a collector after stirring fully, continuing stirring, and then performing aeration foam scraping flotation to obtain first-time concentration concentrate, and returning the product in the tank to roughing;
3) Second carefully selecting: adding the first-time concentrate into a concentration flotation machine 2, adding sodium carbonate and sodium hexametaphosphate simultaneously, wherein the dosage of the sodium carbonate is 30g/t, and the dosage of the sodium hexametaphosphate is 51g/t, performing aeration scraping flotation to obtain lepidolite concentrate, and returning the product in the tank to the concentration flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, wherein the dosage of sodium carbonate is 50g/t, the dosage of sodium hexametaphosphate is 100g/t, adding a collector after stirring fully, continuing stirring, and then carrying out aeration and foam scraping to obtain first-time scavenging concentrate, wherein the first-time scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the air charging, adding 30g/t of sodium carbonate and 50g/t of sodium hexametaphosphate, stirring thoroughly, adding a collector, stirring continuously, 240g/t of the collector, and then carrying out air charging and foam scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and the tailings in the tank are the final tailings of the floatation.
Through detection, the taste of the lepidolite concentrate recovered from the lepidolite beneficiation tail mud reaches 1.97%, and the recovery rate of lithium oxide reaches 66.28%.
The foregoing is merely exemplary embodiments of the present invention, and it should be noted that various changes, modifications, substitutions and alterations can be made herein by those skilled in the art without departing from the technical principles of the present invention, which are also intended to be regarded as the scope of the invention.
Claims (6)
1. A method for recovering lepidolite concentrate from lepidolite beneficiation tail mud is characterized by comprising the following steps of,
1) Concentrating ore slurry in the production process of a mineral dressing plant through a concentrator, pumping the ore slurry to a stirring tank 1 before flotation operation, regulating and keeping the concentration of ore slurry to 25% through a clear water pipe, adding a ore slurry dispersing agent sodium carbonate and water glass, allowing the ore slurry to flow into a stirring tank 2 after the medicament and the mineral fully act, simultaneously adding sodium hexametaphosphate, allowing the ore slurry to flow into a stirring tank 3 after the medicament and the mineral fully act, adding a collecting agent into the stirring tank 3, allowing the medicament and the mineral fully act and flow into a roughing flotation machine, performing aerated flotation and foam scraping to obtain roughing ore concentrate, heating the stirring tank 1, the stirring tank 2 and the stirring tank 3 by steam through pipelines, and allowing a steam boiler to send the steam into the stirring tank to heat the ore slurry in the stirring tank respectively, wherein the ore slurry temperature in the stirring tank 1 is 30-35 ℃, and the ore slurry temperature in the stirring tank 2 is 35-40 ℃ and the ore slurry temperature in the stirring tank 3 is 40-45 ℃;
2) First carefully selecting: adding the roughing concentrate into a concentration flotation machine 1, adding sodium carbonate and sodium hexametaphosphate simultaneously, stirring thoroughly, adding a collector, stirring continuously, and then performing aeration scraping flotation to obtain the first concentration concentrate, wherein the product in the tank returns to roughing;
3) Second carefully selecting: adding the first-time fine concentrate into a fine flotation machine 2, adding sodium carbonate and sodium hexametaphosphate at the same time, and performing aeration, scraping and flotation to obtain lepidolite concentrate, wherein the product in the tank returns to the fine flotation machine 1;
4) First scavenging: adding sodium carbonate and sodium hexametaphosphate into roughing tailings, stirring thoroughly, adding a collector, continuing stirring, and then aerating and scraping to obtain first scavenging concentrate, wherein the first scavenging concentrate returns to roughing;
5) And (3) second scavenging: and after the first scavenging is finished, closing the aeration, adding sodium carbonate and sodium hexametaphosphate, stirring thoroughly, adding a collector, continuing stirring, and then aerating and scraping to obtain second scavenging concentrate, wherein the second scavenging concentrate is returned to the first scavenging, and tailings in the tank are the final tailings of floatation.
2. The method for recovering lepidolite concentrate from lepidolite beneficiation tail mud according to claim 1, wherein the sodium carbonate in the step 1) is used in an amount of 190-210g/t, the sodium silicate is used in an amount of 285-315g/t, the sodium hexametaphosphate is used in an amount of 480-520g/t, and the collector is a complex amine collector in an amount of 830-860g/t.
3. The method for recovering lepidolite concentrate from lepidolite beneficiation tail mud according to claim 1, wherein the sodium carbonate in the step 2) is used in an amount of 28-32g/t and sodium hexametaphosphate is used in an amount of 47-53g/t.
4. The method for recovering lepidolite concentrate from lepidolite beneficiation tail mud according to claim 1, wherein the sodium carbonate in the step 3) is used in an amount of 28-32g/t and sodium hexametaphosphate is used in an amount of 47-53g/t.
5. The method for recovering lepidolite concentrate from lepidolite beneficiation tail mud according to claim 1, wherein the sodium carbonate in the step 4) is used in an amount of 45-55g/t, sodium hexametaphosphate is used in an amount of 95-105g/t, and a collector is used in an amount of 240-260g/t.
6. The method for recovering lepidolite concentrate from lepidolite beneficiation tail mud according to claim 1, wherein the sodium carbonate in the step 5) is used in an amount of 28-32g/t, sodium hexametaphosphate is used in an amount of 47-53g/t, and a collector is used in an amount of 240-260g/t.
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