CN115228621A - Mixed collecting agent and application thereof in flotation separation of calcium-magnesium carbonate minerals - Google Patents
Mixed collecting agent and application thereof in flotation separation of calcium-magnesium carbonate minerals Download PDFInfo
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- CN115228621A CN115228621A CN202210841523.3A CN202210841523A CN115228621A CN 115228621 A CN115228621 A CN 115228621A CN 202210841523 A CN202210841523 A CN 202210841523A CN 115228621 A CN115228621 A CN 115228621A
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- magnesium carbonate
- calcium
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- 238000005188 flotation Methods 0.000 title claims abstract description 83
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 51
- 239000011707 mineral Substances 0.000 title claims abstract description 51
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 title claims abstract description 45
- 239000003795 chemical substances by application Substances 0.000 title claims description 22
- 238000000926 separation method Methods 0.000 title abstract description 37
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 36
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 36
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 25
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 25
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims abstract description 25
- CNXJITYCNQNTBD-UHFFFAOYSA-L dipotassium;hexadecyl phosphate Chemical compound [K+].[K+].CCCCCCCCCCCCCCCCOP([O-])([O-])=O CNXJITYCNQNTBD-UHFFFAOYSA-L 0.000 claims abstract description 21
- 239000006260 foam Substances 0.000 claims abstract description 8
- 235000010755 mineral Nutrition 0.000 claims description 47
- 239000001095 magnesium carbonate Substances 0.000 claims description 15
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 15
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 15
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000010459 dolomite Substances 0.000 claims description 14
- 229910000514 dolomite Inorganic materials 0.000 claims description 14
- 229910021532 Calcite Inorganic materials 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 239000012141 concentrate Substances 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- BOUCRWJEKAGKKG-UHFFFAOYSA-N n-[3-(diethylaminomethyl)-4-hydroxyphenyl]acetamide Chemical compound CCN(CC)CC1=CC(NC(C)=O)=CC=C1O BOUCRWJEKAGKKG-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- RMGVATURDVPNOZ-UHFFFAOYSA-M potassium;hexadecyl hydrogen phosphate Chemical compound [K+].CCCCCCCCCCCCCCCCOP(O)([O-])=O RMGVATURDVPNOZ-UHFFFAOYSA-M 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 238000011084 recovery Methods 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 7
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 6
- 238000007664 blowing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000009837 dry grinding Methods 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000668 effect on calcium Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyoxyethylene group Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- PAHWROPPWOVREG-UHFFFAOYSA-N P(=O)(O)(O)O.C(CCCCCCCCCCCCCCC)[K] Chemical compound P(=O)(O)(O)O.C(CCCCCCCCCCCCCCC)[K] PAHWROPPWOVREG-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
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
- B03D1/014—Organic compounds containing phosphorus
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a mixed collector and application thereof in flotation separation of calcium-magnesium carbonate minerals, wherein the mixed collector comprises potassium hexadecyl phosphate and dodecyl polyoxyethylene ether ammonium sulfate, the collecting capability of the calcium-magnesium carbonate minerals can be improved, meanwhile, flotation foams have excellent performance, and compared with a single collector, the mixed collector provided by the invention has better effect on the flotation of the calcium-magnesium carbonate minerals, the cost of the collector is greatly reduced, and better flotation separation effect can be obtained.
Description
Technical Field
The invention relates to the technical field of flotation of carbonate minerals, in particular to a mixed collector and application thereof in flotation separation of calcium-magnesium carbonate minerals.
Background
Magnesite (MgCO) 3 ) Dolomite (CaMg (CO) 3 ) 2 ) And calcite (CaCO) 3 ) Are important calcium and magnesium resources, are widely used in the fields of metallurgy, magnesium, refractory materials, building materials, chemical industry, agriculture, environmental protection and the like, and have important industrial application value. With the continuous development of high-quality calcium magnesium carbonate mineral resources, medium and low-grade calcium magnesium carbonate minerals gradually become main raw materials for producing magnesium materials in China. The flotation method is an effective means for realizing the enrichment and purification of ores, the collecting agent is a key factor influencing the flotation separation effect, and the research on developing the efficient collecting agent for the flotation of calcium-magnesium carbonate minerals has theoretical and practical significance.
Magnesite, dolomite and calcite belong to the same category of calcium magnesium carbonate minerals and contain the same anion (CO) 3 2- ) And a cation (Ca) partially identical 2+ Or Mg 2+ ) With very similar crystal structure, greater solubility, similar surface properties and flotation performance. A great deal of research is done on the flotation of low-grade calcium magnesium carbonate minerals at home and abroad, but large-scale industrial application cannot be well realized.
Sodium oleate is commonly used as a collecting agent in the traditional flotation reagent, but the sodium oleate has poor dispersibility in ore pulp, the separation effect is not ideal, the problems of large reagent usage amount in the treatment process, poor economy and the like cause that low-grade magnesite, dolomite and calcite cannot be efficiently developed and utilized.
Disclosure of Invention
In view of this, the application provides a mixed collector and an application thereof in flotation separation of calcium magnesium carbonate minerals, and the mixed collector has high dispersibility and solubility and good effect of flotation separation of calcium magnesium carbonate minerals.
In order to achieve the technical purpose, the following technical scheme is adopted in the application:
in a first aspect, the present application provides a mixed collector comprising potassium cetyl phosphate, ammonium laureth sulfate.
Preferably, the ammonium laureth sulfate has the formula C 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n is a natural number of 1-4.
Preferably, the molar ratio of the potassium hexadecyl phosphate to the ammonium dodecyl polyoxyethylene ether sulfate is 1-10.
In a second aspect, the application provides an application of a mixed collector in flotation separation of calcium-magnesium carbonate minerals.
Preferably, the calcium magnesium carbonate mineral is magnesite monoore, dolomite monoore or calcite monoore.
Preferably, the specific application steps are as follows:
s1, grinding an ore sample to be treated to-150 mu m, adding deionized water, and stirring and mixing to obtain ore pulp;
s2, adjusting the pH value of the ore pulp to 5-12, and adding the mixed collecting agent after uniformly stirring to obtain a mixture;
and S3, stirring the mixture, introducing air with a constant flow rate, and performing flotation and foam scraping to obtain a target ore sample.
Preferably, the concentration of the ore pulp is 25-50g/L.
Preferably, the concentration of the mixed collector is 20-150mg/L.
Preferably, the air flow rate is 35. + -.5 ml/min.
Preferably, the flotation froth scraping time is 3-5min.
The beneficial effect of this application is as follows: according to the scheme, the dodecyl polyoxyethylene ether ammonium sulfate and the potassium hexadecyl phosphate are combined to form the mixed collecting agent, the polyoxyethylene group contained in the dodecyl polyoxyethylene ether ammonium sulfate is high in hydrophilicity, the hydrophilic group has partial negative charges, the dispersity and the solubility of the potassium hexadecyl phosphate are improved, the collecting agent and other flotation reagents are uniformly dispersed in ore pulp, the flotation efficiency is improved, the good recovery rate can be kept under the condition of less reagent consumption, and the better separation flotation effect is achieved on calcium magnesium carbonate single minerals such as magnesite, dolomite or calcite.
Drawings
FIG. 1 is a process flow diagram of flotation separation in the scheme.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application provides a mixed collector, which comprises a composition of potassium hexadecyl phosphate and ammonium dodecyl polyoxyethylene ether sulfate, wherein the molecular formula of the ammonium dodecyl polyoxyethylene ether sulfate is C 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n is a natural number from 1 to 4, such as 1, 2, 3, 4; suitably but not limitingly, the molar ratio of potassium hexadecyl phosphate to ammonium dodecylpolyoxyethylene ether sulfate is 1 to 10, suitably but not limitingly, such as 1, 2, 1, 3, 1, 5, 6, 1.
In the scheme, the dodecyl polyoxyethylene ether ammonium sulfate and the potassium hexadecyl phosphate form the combined collecting agent, the polyoxyethylene group contained in the combined collecting agent has stronger hydrophilicity, and the hydrophilic group has partial negative charges, so that the dispersity and the solubility of the collecting agent are improved, the collecting agent and other flotation reagents are uniformly dispersed in ore pulp, the flotation efficiency is enhanced, a better recovery rate can be kept under the condition of less reagent consumption, and a better action effect on calcium magnesium carbonate type single minerals is achieved.
As indicated herein, the "calcium magnesium carbonate mineral monoore" includes one of industrial magnesite, industrial dolomite or industrial calcite.
Meanwhile, the application provides an application of the mixed collector in flotation separation of calcium-magnesium-carbonate minerals, as shown in fig. 1, the specific application steps are as follows:
s1, grinding an ore sample to be treated to-150 mu m, adding deionized water, and stirring and mixing to obtain ore pulp;
s2, adjusting the pH value of the ore pulp to 5-12 (such as 5, 6, 8, 10 and 12) by using hydrochloric acid, sodium hydroxide or sodium carbonate solution, stirring uniformly, and adding a mixed collecting agent to obtain a mixture;
and S3, stirring the mixture, introducing air with a constant flow rate, and performing flotation and foam scraping to obtain a target ore sample.
Preferably, the pulp has a consistency of 25-50g/L, suitably but not limited to, for example, 25g/L, 30g/L, 40g/L, 50g/L, and more preferably, the pulp has a consistency of 28g/L.
Preferably, the concentration of the mixed collector is 20-150mg/L, such as 20mg/L, 40mg/L, 60mg/L, 80mg/L, 100mg/L, 120mg/L, 150mg/L, and more preferably, the concentration of the mixed collector is 60mg/L.
Preferably, the air flow rate is 35. + -.5 ml/min.
Preferably, the flotation froth scraping time is 3-5min.
In step S3, the ore pulp is stirred by a magnetic rotor and a magnetic stirrer, and the rotating speed is set to 900-1200rpm.
According to different choices of raw materials of calcium magnesium carbonate minerals, different target concentrates are obtained, for example, industrial magnesite is selected as a mineral sample to be treated and subjected to flotation separation to obtain magnesite concentrate, industrial dolomite is selected as a mineral sample to be treated and subjected to flotation separation to obtain dolomite concentrate, and industrial calcite is selected as a mineral sample to be treated and subjected to flotation separation to obtain calcite concentrate.
The flotation method in the application is used for the direct flotation of calcium-magnesium-carbonate minerals, and can be carried out in the devices which are disclosed in the prior art and can be used for the direct flotation of ores, such as flotation machines, flotation columns and the like.
In the scheme, products obtained after the flotation process is carried out are foam products and products at the bottom of the flotation tube, wherein the foam products are required concentrate, and the products at the bottom are tailings.
The test methods in the following examples are conventional methods unless otherwise specified; reagents and materials, unless otherwise specified, are commercially available. Wherein the magnesite and dolomite are obtained from Anshan Liaoning area, and the calcite is obtained from Changsha in Hunan area. The three minerals are natural ores with high purity after hand selection. In the following examples, four kinds of ammonium laureth sulfate having different polymerization degrees were used for the tests, all of which are available from Colonial Chemical company, USA, tennessee, and the effective ingredient thereof was 24 to 26%.
Example 1
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals comprises the following specific steps:
crushing raw magnesite monomineral to-2 mm by using a jaw crusher, quickly dry-grinding the monomineral to-150 mu m by using a ceramic ball mill, finally screening out a product with a target size fraction by using a Taylor standard sieve in a wet manner, storing the product in a dryer, mixing a magnesite sample to be treated with deionized water, adding the mixture into a flotation tube, uniformly mixing, and mixing until the solid concentration in ore pulp is 28g/L;
adjusting the pH value of the ore pulp to 8, stirring the ore pulp by adopting a magnetic rotor and a magnetic stirrer, setting the rotating speed to be 1100rpm, stirring for 2min, then respectively adding a mixed collector A1, a mixed collector A2, a mixed collector A3 and a mixed collector A4, and carrying out flotation, wherein the concentration of the mixed collector is 60mg/L, the mixed collectors are the mixture of dodecyl polyoxyethylene ether ammonium sulfate and hexadecyl potassium phosphate with the molar ratio of 1, and the molecular formula of the dodecyl polyoxyethylene ether ammonium sulfate is C 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n =1 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A1, n =2 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A2, n =3 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A3, and n =4 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A4;
and (3) blowing air with a constant flow into the flotation pipe, then blowing bubbles, setting the air flow rate to be 35 +/-5 ml/min, setting the flotation bubble blowing duration to be 3min, and respectively filtering the foam product and the bottom product to obtain magnesite concentrate.
Example 2
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 1, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 3.
Example 3
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 1, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 1.
Example 4
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals comprises the following specific steps:
crushing the dolomite monomineral raw ore to-2 mm by using a jaw crusher, then rapidly dry-grinding the monomineral to-150 mu m by using a ceramic ball mill, finally wet-screening out a product with a target size fraction by using a Taylor standard sieve, storing the product in a dryer for a flotation test, mixing the dolomite monomineral to be treated and deionized water together, adding the mixture into a flotation tube, uniformly mixing, and mixing until the solid concentration in ore pulp is 30g/L;
adjusting the pH value of the ore pulp to 7, stirring the ore pulp by adopting a magnetic rotor and a magnetic stirrer, setting the rotation speed to be 1100rpm, stirring for 2min, then carrying out flotation, respectively adding a mixed collector A1, a mixed collector A2, a mixed collector A3 and a mixed collector A4, carrying out flotation, and carrying out flotationThe concentration of the medium-concentration mixed collector is 80mg/L, the mixed collector is a mixture of dodecyl polyoxyethylene ether ammonium sulfate and potassium hexadecyl phosphate with the molar ratio of 1 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n =1 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A1, n =2 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A2, n =3 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A3, and n =4 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A4;
and starting to scrape bubbles after constant flow of air is introduced into the flotation tube, wherein the air flow rate is set to be 35 +/-5 ml/min, and the flotation bubble scraping duration is 4min.
Example 5
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 4, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 3.
Example 6
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 4, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 1.
Example 7
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals comprises the following specific steps:
crushing calcite monomineral raw ore to-2 mm by using a jaw crusher, rapidly dry-grinding the monomineral to-150 mu m by using a ceramic ball mill, finally wet-screening out a product with a target size fraction by using a Taylor standard sieve, storing the product in a dryer for a flotation test, mixing an ore sample to be treated with deionized water, adding the mixture into a flotation tube, uniformly mixing, and mixing until the solid concentration in ore pulp is 25g/L;
adjusting the pH value of the ore pulp to 9, stirring the ore pulp by adopting a magnetic rotor and a magnetic stirrer, setting the rotating speed to 1100rpm, and stirringAnd (2) stirring for 2min, then performing flotation, and adding a mixed collector A1, a mixed collector A2, a mixed collector A3 and a mixed collector A4 respectively to perform flotation, wherein the concentrations of the mixed collectors are all 80mg/L, the mixed collectors are all a mixture of dodecyl polyoxyethylene ether ammonium sulfate and potassium hexadecyl phosphate with a molar ratio of 1, and the molecular formula of the dodecyl polyoxyethylene ether ammonium sulfate is C 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n =1 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A1, n =2 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A2, n =3 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A3, and n =4 of dodecyl polyoxyethylene ether ammonium sulfate in the mixed collector A4;
blowing air with a constant flow into the flotation tube, and then blowing bubbles, wherein the air flow rate is set to be 35 +/-5 ml/min, and the duration of blowing bubbles in the flotation tube is 5min.
Example 8
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 7, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 3.
Example 9
The application of the mixed collector in flotation separation of calcium-magnesium carbonate minerals is the same as in example 7, except that the molar ratio of ammonium dodecyl polyoxyethylene ether sulfate to potassium hexadecyl phosphate is 1.
Comparative example 1
The application of a collector in the flotation separation of calcium-magnesium carbonate minerals is carried out by the same steps as the example 1 except that the collector is 60mg/L potassium hexadecyl phosphate.
Comparative example 2
The application of the collecting agent in the flotation separation of calcium-magnesium carbonate minerals is the same as the other steps in the example 1, except that the collecting agent is 60mg/L dodecyl polyoxyethylene ether ammonium sulfate with n = 3.
Comparative example 3
The application of a collector in the flotation separation of calcium-magnesium carbonate minerals is carried out by the same steps as the example 1 except that the collector is 60mg/L of sodium oleate.
Comparative example 4
The application of a collector in the flotation separation of calcium-magnesium carbonate minerals is carried out by the same steps as in example 4, except that the collector is 80mg/L potassium hexadecyl phosphate.
Comparative example 5
The application of the collecting agent in the flotation separation of calcium-magnesium carbonate minerals is the same as the other steps in the example 4, except that the collecting agent is 80mg/L dodecyl polyoxyethylene ether ammonium sulfate with n = 3.
Comparative example 6
The application of the collecting agent in the flotation separation of calcium-magnesium carbonate minerals is the same as the other steps in the example 4, except that the collecting agent is 80mg/L sodium oleate.
Comparative example 7
The application of a collector in the flotation separation of calcium magnesium carbonate minerals is carried out by the same steps as the example 7 except that the collector is 80mg/L potassium hexadecyl phosphate.
Comparative example 8
The application of a collector in the flotation separation of calcium-magnesium carbonate minerals is the same as the other steps in the example 7, except that the collector is 80mg/L of dodecyl polyoxyethylene ether ammonium sulfate with n = 3.
Comparative example 9
The application of a collector in the flotation separation of calcium-magnesium carbonate minerals is the same as the other steps in the example 7, except that the collector is 80mg/L sodium oleate.
Evaluation test
The froth and bottoms obtained in examples 1-9 were filtered separately and dried in a vacuum oven at 60 c and weighed to calculate the mineral recovery, wherein the flotation effect for magnesite is shown in table 1, the flotation effect for dolomite is shown in table 2 and the flotation effect for calcite is shown in table 3.
TABLE 1 recovery of magnesite by flotation separation with different collectors
| A1 | A2 | A3 | A4 | |
| Example 1 | 82％ | 85％ | 79％ | 77％ |
| Example 2 | 91％ | 92％ | 90％ | 89％ |
| Example 3 | 69％ | 74％ | 72％ | 68％ |
TABLE 2 recovery of dolomite separated by flotation with different collectors
| A1 | A2 | A3 | A4 | |
| Example 4 | 68％ | 70％ | 67％ | 65％ |
| Example 5 | 72％ | 73％ | 70％ | 69％ |
| Example 6 | 64％ | 66％ | 63％ | 60％ |
TABLE 3 recovery of calcite from flotation separation with different collectors
| A1 | A2 | A3 | A4 | |
| Example 7 | 69％ | 71％ | 66％ | 64％ |
| Example 8 | 76％ | 78％ | 75％ | 73％ |
| Example 9 | 65％ | 67％ | 63％ | 61％ |
The foam product and the bottom product obtained in comparative examples 1-6 were filtered separately, dried in a vacuum oven at 60 ℃, weighed, and the mineral recovery was calculated, the results are shown in table 4.
Table 4 recovery of calcium magnesium carbonate mineral flotation separation by single collector
It can be seen that calcium magnesium carbonate mineral is floated by using the potassium hexadecyl phosphate, the ammonium dodecyl polyoxyethylene ether sulfate and the sodium oleate independently and the combined collecting agent of the ammonium dodecyl polyoxyethylene ether sulfate and the potassium hexadecyl phosphate, the combined collecting agent has a better flotation effect on calcium magnesium carbonate mineral monomines, and the calcium magnesium carbonate mineral monomines have a synergistic effect.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention.
Claims (10)
1. The mixed collector is characterized by comprising potassium hexadecyl phosphate and dodecyl polyoxyethylene ether ammonium sulfate.
2. The mixed collector of claim 1, wherein the ammonium laureth sulfate has a formula of C 12 H 25 -(OC 2 H 4 ) n -O-SO 3 NH 4 Wherein n is a natural number of 1 to 4.
3. A mixed collector as claimed in claim 1, wherein the molar ratio of potassium cetyl phosphate to ammonium laureth sulfate is 1-10.
4. Use of a mixed collector according to any one of claims 1 to 3 in the flotation of calcium magnesium carbonate minerals.
5. Use according to claim 4, wherein the calcium magnesium carbonate mineral is magnesite, dolomite or calcite monoore.
6. The application of claim 5, wherein the specific application steps are as follows:
s1, grinding an ore sample to be treated to-150 mu m, adding deionized water, and stirring and mixing to obtain ore pulp;
s2, adjusting the pH value of the ore pulp to 5-12, and adding the mixed collecting agent after uniformly stirring to obtain a mixture;
and S3, stirring the mixture, introducing air with a constant flow rate, and performing flotation and foam scraping to obtain the target ore sample concentrate.
7. Use according to claim 6, characterized in that the pulp has a consistency of 25-50g/L.
8. The use according to claim 6, wherein the concentration of the mixed collector is 20-150mg/L.
9. Use according to claim 6, wherein the air flow rate is 35 ± 5ml/min.
10. Use according to claim 6, wherein the time of flotation froth scraping is 3-5min.
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