CN114130543B - Bauxite collecting agent and application thereof, and bauxite beneficiation method - Google Patents
Bauxite collecting agent and application thereof, and bauxite beneficiation method Download PDFInfo
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- CN114130543B CN114130543B CN202111333064.XA CN202111333064A CN114130543B CN 114130543 B CN114130543 B CN 114130543B CN 202111333064 A CN202111333064 A CN 202111333064A CN 114130543 B CN114130543 B CN 114130543B
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- bauxite
- collecting agent
- collector
- sodium oleate
- dodecyl mercaptan
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 23
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- FRQQKWGDKVGLFI-UHFFFAOYSA-N 2-methylundecane-2-thiol Chemical compound CCCCCCCCCC(C)(C)S FRQQKWGDKVGLFI-UHFFFAOYSA-N 0.000 claims abstract description 32
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005188 flotation Methods 0.000 claims description 33
- 239000002904 solvent Substances 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 10
- 230000002000 scavenging effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 7
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 7
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims 1
- 239000012141 concentrate Substances 0.000 abstract description 15
- 229910001648 diaspore Inorganic materials 0.000 abstract description 14
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 10
- 239000011707 mineral Substances 0.000 abstract description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052622 kaolinite Inorganic materials 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 15
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 9
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000008233 hard water Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000010408 sweeping 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
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- 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
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to the technical field of mineral processing, in particular to a bauxite collecting agent and application thereof, and a bauxite beneficiation method. The bauxite collector comprises sodium oleate and tertiary dodecyl mercaptan in a mass ratio of 4-9:1. According to the embodiment of the invention, the combined collector of sodium oleate and tertiary dodecyl mercaptan is utilized, the tertiary dodecyl mercaptan can promote the adsorption capacity of sodium oleate on the surface of diasporite, and reduce the adsorption capacity of sodium oleate on the surface of kaolinite, so that the effective separation of diasporite and kaolinite in bauxite is realized, and finally the aluminum-silicon ratio of bauxite concentrate is improved.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a bauxite collecting agent and application thereof, and a bauxite beneficiation method.
Background
Aluminum is the third largest metal element in the crust next to oxygen and silicon. Aluminum and its alloys are widely used in construction, transportation, commodities, power transmission, machinery, electronic components, packaging materials, and the like due to their excellent properties and low price. However, the reserves of the Chinese aluminum resources are not very abundant, the dependence of the Chinese aluminum industry on imported bauxite exceeds 60 percent, and the domestic aluminum resource supply capacity faces huge demand pressure. Therefore, how to efficiently and cleanly utilize the prior bauxite resources, the productivity of domestic bauxite is improved as much as possible, the dependency degree of China on imported bauxite is reduced, and the method has important significance on the development of aluminum resources in China and the strategic development of China.
Diasporic bauxite is the main raw material for industrial production of alumina in China, but because the bauxite in China has lower aluminum-silicon ratio, the bauxite can be further produced by adopting a Bayer process after pretreatment is generally carried out, and the most common pretreatment method is a flotation desilication method. At present, sodium oleate is the most commonly used collector in bauxite flotation desilication, and the low price and the excellent collecting capacity of the sodium oleate enable the sodium oleate to be widely applied to various types of bauxite positive flotation.
Disclosure of Invention
The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems: the existing bauxite collecting agent has obvious separation effect on high-grade bauxite with high aluminum-silicon ratio, has poor separation effect on low-grade bauxite and has low recovery rate, and the inventor finds that the reason is that the sodium oleate collecting agent is not hard water resistant, low-temperature resistant and poor in separation capability, and the sodium oleate collecting agent is difficult to adapt to domestic bauxite development trend along with the gradual reduction of the aluminum grade and aluminum-silicon ratio of a bauxite layer, so that the development of the high-efficiency bauxite collecting agent and the promotion of the bauxite flotation effect are the problems to be solved in the current bauxite beneficiation.
The present invention aims to solve at least one of the technical problems in the related art to some extent. For this reason, the embodiment of the invention provides a bauxite collecting agent and application thereof, and a bauxite beneficiation method, the embodiment of the invention utilizes a combined collecting agent of sodium oleate and tertiary dodecyl mercaptan, the tertiary dodecyl mercaptan can promote the adsorption capacity of sodium oleate on the surface of diasporite and reduce the adsorption capacity of sodium oleate on the surface of kaolinite, so that the effective separation of diasporite and kaolinite in bauxite is realized, and finally the aluminum-silicon ratio of bauxite concentrate is improved.
Bauxite collectors of embodiments of the present invention include sodium oleate and tertiary dodecyl mercaptan.
The bauxite collecting agent provided by the embodiment of the invention has the advantages and technical effects that: 1. in the bauxite collecting agent provided by the embodiment of the invention, the sodium oleate and the tertiary dodecyl mercaptan are synergistic, the tertiary dodecyl mercaptan can promote the adsorption capacity of sodium oleate on the surface of diasporite, reduce the adsorption capacity of sodium oleate on the surface of kaolinite, and effectively improve the selectivity of sodium oleate, so that the selective collection of diasporite in bauxite is realized, and the flotation effect of bauxite is improved; 2. in the bauxite collecting agent provided by the embodiment of the invention, sodium oleate and tertiary dodecyl mercaptan are mutually solubilized and can form uniform and stable solution with a solvent, so that the collecting agent has stronger environmental adaptability, is more resistant to hard water and low temperature, has low dosage of medicament and has good application prospect.
In some embodiments of the invention, the mass ratio of the sodium oleate to the tertiary dodecyl mercaptan is 4-9:1.
The embodiment of the invention provides an application of the bauxite collecting agent in bauxite floatation.
The bauxite beneficiation method comprises the steps of carrying out flotation on raw bauxite, wherein a flotation reagent comprises the bauxite collecting agent.
The bauxite beneficiation method provided by the embodiment of the invention has the advantages and technical effects that: 1. in the beneficiation method provided by the embodiment of the invention, the synergy is realized between the sodium oleate and the tertiary dodecyl mercaptan of the bauxite collecting agent, the tertiary dodecyl mercaptan can promote the adsorption capacity of the sodium oleate on the surface of diasporite, and the adsorption capacity of the sodium oleate on the surface of kaolinite is reduced, so that the selective collection of diasporite in bauxite is realized, and the flotation effect of bauxite is improved; 2. in the bauxite collecting agent, sodium oleate and tertiary dodecyl mercaptan are mutually solubilized and can form uniform and stable solution with a solvent, so that the collecting agent has stronger environment adaptability, is more resistant to hard water and low temperature, has low dosage of medicament and has good application prospect.
In some embodiments of the invention, the beneficiation process comprises dissolving the bauxite collector in a solvent comprising organic matter and water in a volume ratio of 3-5:1 to prepare a collector solution.
In some embodiments of the invention, the organic is ethanol.
In some embodiments of the invention, the concentration of bauxite collector in the formulated collector solution is 0.1X10 -4mol/L-5×10-4 mol/L.
In some embodiments of the invention, the flotation includes roughing, beneficiating and scavenging, the roughing bauxite collector being in an amount of 180-230g/t Dry ore , the beneficiating bauxite collector being in an amount of 0-50g/t Dry ore , and the scavenging bauxite collector being in an amount of 30-100g/t Dry ore .
In some embodiments of the invention, the flotation reagent further comprises sodium hexametaphosphate in the rougher at 50-70g/t Dry ore and in the beneficiater at 5-20g/t Dry ore .
In some embodiments of the invention, the bauxite raw ore has an aluminum to silicon ratio of 1 to 3.
Drawings
Fig. 1 is a schematic flow chart of a bauxite beneficiation process in accordance with embodiments of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Bauxite collectors of embodiments of the present invention include sodium oleate and tertiary dodecyl mercaptan.
According to the bauxite collecting agent, the sodium oleate and the tertiary dodecyl mercaptan are synergistic, the tertiary dodecyl mercaptan can promote the adsorption capacity of the sodium oleate on the surface of diasporite, reduce the adsorption capacity of the sodium oleate on the surface of kaolinite, and effectively improve the selectivity of the sodium oleate, so that the selective collection of the diasporite in bauxite is realized, and the flotation effect of the bauxite is improved; in the bauxite collecting agent provided by the embodiment of the invention, sodium oleate and tertiary dodecyl mercaptan are mutually solubilized and can form uniform and stable solution with a solvent, so that the collecting agent has stronger environmental adaptability, is more resistant to hard water and low temperature, has low dosage of medicament and has good application prospect.
In some embodiments of the invention, the mass ratio of the sodium oleate to the tertiary dodecyl mercaptan is 4-9:1. The bauxite collecting agent of the embodiment of the invention preferably selects the mass ratio of sodium oleate and tertiary dodecyl mercaptan, ensures the synergy and mutual solubilization of the sodium oleate and the tertiary dodecyl mercaptan, and has insignificant selectivity enhancement effect if the mass ratio is too high and can cause reagent layering and influence use if the mass ratio is too low because the tertiary dodecyl mercaptan is not dissolved in a solvent in flotation beneficiation.
The embodiment of the invention provides an application of the bauxite collecting agent in bauxite floatation.
The bauxite beneficiation method in the embodiment of the invention, as shown in figure 1, comprises the step of carrying out flotation on raw bauxite, wherein the flotation reagent comprises the bauxite collector.
In the bauxite beneficiation method provided by the embodiment of the invention, the sodium oleate and the tertiary dodecyl mercaptan of the bauxite collecting agent are synergistic, the tertiary dodecyl mercaptan can promote the adsorption capacity of sodium oleate on the surface of diasporite, reduce the adsorption capacity of sodium oleate on the surface of kaolinite, and effectively improve the selectivity of sodium oleate, so that the selective collection of diasporite in bauxite is realized, and the flotation effect of bauxite is improved; in the method of the embodiment of the invention, sodium oleate and tertiary dodecyl mercaptan in the adopted bauxite collecting agent are mutually solubilized, and can form uniform and stable solution with the solvent, so that the collecting agent has stronger environment adaptation capability, hardness water resistance and low temperature resistance, low dosage of the agent and good application prospect.
In some embodiments of the invention, the beneficiation process comprises dissolving the bauxite collector in a solvent comprising an organic substance and water in a volume ratio of 3-5:1, preferably the organic substance is ethanol, to prepare a collector solution. Further preferably, the concentration of bauxite collector in the formulated collector solution is 0.1X10 -4mol/L-5×10-4 mol/L. The beneficiation method disclosed by the embodiment of the invention optimizes the formula of the solvent, so that sodium oleate and tertiary dodecyl mercaptan can be better dispersed in the solvent to form a uniform and stable collector solution.
In some embodiments of the invention, the flotation includes roughing, beneficiating and scavenging, the roughing bauxite collector being in an amount of 180-230g/t Dry ore , the beneficiating bauxite collector being in an amount of 0-50g/t Dry ore , and the scavenging bauxite collector being in an amount of 30-100g/t Dry ore . The beneficiation method of the embodiment of the invention optimizes the dosage of the bauxite collecting agent in roughing, selecting and sweeping, ensures the flotation effect and reduces the dosage of the agent.
In some embodiments of the invention, the flotation reagent further comprises sodium hexametaphosphate in the rougher at 50-70g/t Dry ore and in the beneficiater at 5-20g/t Dry ore .
In some embodiments of the invention, further comprising grinding before flotation, filtering after flotation, and drying, wherein the grinding fineness is 85-95% of-200 mesh. According to the beneficiation method disclosed by the embodiment of the invention, the raw ore is ground, the granularity is reduced, the mineral aggregate and the flotation reagent can be promoted to be fully contacted, and the flotation effect is improved.
In some embodiments of the invention, the bauxite raw ore has an aluminum to silicon ratio of 1 to 3. Because the bauxite collecting agent optimizes the formula and realizes the selective collection of diasporic bauxite, the bauxite beneficiation method can treat low-grade bauxite.
Furthermore, the low-grade bauxite has various silicate mineral types, the SiO 2 content is up to more than 24 percent, and the collector provided by the embodiment of the invention can still exert a good flotation effect on the bauxite.
The present invention will be described in detail with reference to the following examples and drawings.
Example 1
The raw bauxite of this example was selected from a low-grade bauxite sample a in the Henan, and the chemical composition analysis thereof is shown in Table 1.
TABLE 1
| Component (A) | Fe | S | TiO2 | Na2O | Al2O3 | SiO2 | P2O5 | MgO | Loss of burning | A/S |
| Content/% | 4.69 | 0.97 | 3.16 | 0.25 | 47.90 | 24.93 | 0.23 | 0.50 | 17.37 | 1.92 |
Wherein A/S is the ratio of the content of Al 2O3/SiO2 in bauxite ore, and the following is the same.
Preparing bauxite collector solution: ethanol/ultrapure water is selected as a solvent of the bauxite collector, and the volume ratio of the ethanol to the ultrapure water is 8:2. Under the condition of the solvent, fully dissolving a bauxite collecting agent consisting of sodium oleate and tertiary dodecyl mercaptan in a mass ratio of 4:1 into the solvent to prepare a bauxite collecting agent solution, wherein the concentration of the bauxite collecting agent in the solution is 1 multiplied by 10 -4 mol/L.
As shown in fig. 1, the bauxite is beneficiated by using a bauxite collector, comprising the steps of:
(1) Grinding: grinding the ore sample A, wherein the blanking of a 200-mesh sieve accounts for 87% to obtain an abrasive;
(2) And (3) flotation: preparing an abrasive into floating ore pulp, and adjusting the pH value of the abrasive to 9.5 by sodium carbonate; feeding the floating ore pulp into roughing to obtain roughing concentrate and roughing tailings, wherein the dosage of bauxite collecting agent in roughing is 200g/t Dry ore , and the dosage of sodium hexametaphosphate is 60g/t Dry ore ;
the roughing concentrate sequentially enters four stages of concentration to obtain flotation concentrate, the concentration tailings of each stage are circulated to the previous stage of flotation, the dosage of bauxite collecting agents in each stage of concentration is sequentially 0, 50g/t Dry ore , 0 and 0, and the dosage of sodium hexametaphosphate is sequentially 20g/t Dry ore 、15g/t Dry ore 、10g/t Dry ore 、5g/t Dry ore ;
The roughing tailings enter three sections of scavenging to obtain flotation tailings, scavenging concentrate of each section is circulated to the previous stage of floatation, and the dosage of bauxite collecting agents in each section of scavenging is sequentially 100g/t Dry ore 、100g/t Dry ore 、30g/t Dry ore ;
(3) And filtering and drying the obtained flotation concentrate and flotation tailings to obtain a concentrate product and a tailings product.
The beneficiation results of this example are shown in table 2.
TABLE 2
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 76.04 | 59.13 | 4.68 | 93.87 |
| Tailings | 23.96 | 12.25 | 0.71 | 6.13 |
| Mineral sample A | 100.00 | 47.90 | 1.92 | 100.00 |
Example 2
The same preparation as in example 1 was followed except that the mass ratio of sodium oleate to t-dodecyl mercaptan in the bauxite collector was 5.6:1. The beneficiation results of this example are shown in table 3.
TABLE 3 Table 3
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 75.50 | 59.21 | 4.59 | 93.33 |
| Tailings | 24.50 | 13.04 | 0.73 | 6.67 |
| Mineral sample A | 100.00 | 47.90 | 1.92 | 100.00 |
Example 3
The same preparation as in example 1 was followed except that the mass ratio of sodium oleate to t-dodecyl mercaptan in the bauxite collector was 9:1. The beneficiation results of this example are shown in table 4.
TABLE 4 Table 4
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 75.23 | 59.15 | 4.43 | 92.90 |
| Tailings | 24.77 | 13.73 | 0.80 | 7.10 |
| Mineral sample A | 100.00 | 47.90 | 1.92 | 100.00 |
Example 4
The same preparation method as in example 1 was used, except that the bauxite raw ore was different.
The raw bauxite of this example was selected from a low-grade bauxite sample B in the Henan, the chemical composition analysis thereof is shown in Table 5, and the beneficiation results of this example are shown in Table 6.
TABLE 5
| Component (A) | Fe | S | TiO2 | Na2O | Al2O3 | SiO2 | P2O5 | MgO | Loss of burning | A/S |
| Content/% | 4.71 | 0.92 | 3.19 | 0.23 | 47.29 | 24.95 | 0.22 | 0.53 | 17.96 | 1.90 |
TABLE 6
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 75.13 | 58.95 | 4.51 | 92.46 |
| Tailings | 24.87 | 14.52 | 0.73 | 7.54 |
| Mineral sample B | 100.00 | 47.90 | 1.90 | 100.00 |
Comparative example 1
The same preparation method as in example 1 was used, except that tertiary dodecyl mercaptan was not added to the bauxite collector. The beneficiation results of this comparative example are shown in table 7.
TABLE 7
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 76.58 | 55.23 | 3.51 | 88.30 |
| Tailings | 23.42 | 23.93 | 0.95 | 11.70 |
| Mineral sample A | 100.00 | 47.9 | 1.92 | 100.00 |
Comparative example 2
The same preparation as in example 1 was carried out, except that the mass ratio of sodium oleate to t-dodecyl mercaptan was 2:1.
In comparative example 2, since the amount of t-dodecyl mercaptan added to the collector was too large, it was difficult to dissolve in the solvent completely, and delamination of the reagent was generated, and the reagent was ineffective, and mineral separation was not possible.
Comparative example 3
The same preparation method as in example 1 was used, except that the solvent of the bauxite collector was water.
In comparative example 3, since t-dodecyl mercaptan was poorly soluble in water, delamination occurred in the formulated bauxite collector solution, and beneficiation could not be achieved.
Comparative example 4
The same preparation as in example 1 is followed except that the bauxite collector solvent is methanol and water in a volume ratio of 8:2.
In comparative example 4, the prepared bauxite collector solution was delaminated and no beneficiation could be achieved.
Comparative example 5
The same preparation as in example 1 was followed except that the solvent of the bauxite collector was ethylene glycol and water in a volume ratio of 8:2.
In comparative example 5, the prepared bauxite collector solution was delaminated and no beneficiation could be achieved.
Comparative example 6
The same preparation method as in example 4 was used, except that tertiary dodecyl mercaptan was not added to the bauxite collector. The beneficiation results of this comparative example are shown in table 8.
TABLE 8
| Sample of | Yield (%) | Grade of Al 2O3 (%) | A/S | Recovery of Al 2O3 (%) |
| Concentrate | 76.22 | 55.45 | 3.95 | 88.23 |
| Tailings | 23.78 | 23.71 | 0.99 | 11.77 |
| Mineral sample B | 100.00 | 47.90 | 1.90 | 100.00 |
In the embodiments 1-4, the bauxite collecting agent provided by the embodiment of the invention is adopted for floatation, so that the recovery rate and the aluminum-silicon ratio of Al 2O3 in bauxite are effectively improved, the grade of Al 2O3 in a bauxite concentrate product is more than or equal to 58%, the aluminum-silicon ratio is more than or equal to 4.4, and the recovery rate of Al 2O3 is more than or equal to 92%, and therefore, the bauxite collecting agent provided by the embodiment of the invention can realize the selective collection of diasporic bauxite in bauxite, and the floatation effect of bauxite is effectively improved.
From comparative examples 1 and 6, it is known that tertiary dodecyl mercaptan promotes adsorption of sodium oleate onto diasporite surfaces, thereby enhancing the collection effect of the collector. As is clear from comparative example 2, when the amount of t-dodecyl mercaptan is too high, the agent is delaminated, and the agent is disabled, and the beneficiation cannot be achieved. As is clear from comparative examples 3-5, the adoption of a mixed solvent of ethanol and water as the solvent of the collector can enable sodium oleate and tertiary dodecyl mercaptan to be better dispersed in the solvent to form a uniform and stable collector solution, thereby realizing the selective collection of diasporite in bauxite.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (2)
1. The bauxite dressing method is characterized by comprising the steps of carrying out flotation on raw bauxite, wherein a flotation reagent comprises a bauxite collector; the bauxite collector comprises sodium oleate and tertiary dodecyl mercaptan, wherein the mass ratio of the sodium oleate to the tertiary dodecyl mercaptan is 4-9:1;
The beneficiation method comprises the steps of dissolving the bauxite collecting agent in a solvent to prepare a collecting agent solution, wherein the solvent comprises organic matters and water in a volume ratio of 3-5:1; the organic matter is ethanol; the aluminum-silicon ratio of the bauxite raw ore is 1-3; the SiO 2 content of the bauxite raw ore is up to more than 24%;
The flotation comprises rough concentration, concentration and scavenging, wherein the dosage of a bauxite collecting agent in the rough concentration is 180-230g/t Dry ore , the dosage of a bauxite collecting agent in the concentration is 0-50g/t Dry ore , and the dosage of a bauxite collecting agent in the scavenging is 30-100g/t Dry ore ;
The flotation reagent further comprises sodium hexametaphosphate, the sodium hexametaphosphate dosage in the roughing is 50-70g/t Dry ore , and the sodium hexametaphosphate dosage in the refining is 5-20g/t Dry ore .
2. The beneficiation process in accordance with claim 1, wherein the concentration of bauxite collector in the formulated collector solution is 0.1 x 10 -4mol/L-5×10-4 mol/L.
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| CN101176859A (en) * | 2007-12-17 | 2008-05-14 | 中国铝业股份有限公司 | Method for ore dressing and desilicating mixed type bauxite |
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| FR1239768A (en) * | 1959-11-04 | 1960-08-26 | Method and apparatus for concentrating or separating ores | |
| CN102076419B (en) * | 2008-07-02 | 2014-04-09 | 佐治亚-太平洋化工品有限公司 | Collectors |
| CN101972703B (en) * | 2010-10-27 | 2013-01-30 | 株洲市湘麒科技开发有限公司 | Beneficiation method for recovering zinc, lead and silver from zinc leaching residue |
| US10293345B2 (en) * | 2015-10-12 | 2019-05-21 | Kraton Chemical, Llc | Collector compositions and methods of using thereof |
| CN113578531A (en) * | 2021-07-20 | 2021-11-02 | 中国地质科学院郑州矿产综合利用研究所 | Synchronous desulfurization and desilication method for direct flotation of high-sulfur bauxite |
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Non-Patent Citations (2)
| Title |
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| Flotation Separation of Diaspore and Kaolinite by Using a Mixed Collector of Sodium Oleate-Tert Dodecyl Mercaptan;Xiaofei Man 等;Frontiers in Chemistry(第7期);1-8 * |
| Xiaofei Man 等.Flotation Separation of Diaspore and Kaolinite by Using a Mixed Collector of Sodium Oleate-Tert Dodecyl Mercaptan.Frontiers in Chemistry.2019,(第7期),1-8. * |
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