CN113692318A - Collector composition comprising N-acylated amino acid and method for treating non-sulfidic ores - Google Patents
Collector composition comprising N-acylated amino acid and method for treating non-sulfidic ores Download PDFInfo
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Abstract
The present invention relates to a collector composition suitable for treating non-sulfidic ores, comprising: (i)1 to 50% by weight of an N-acylated amino acid of formula R1-CO-NX-CYH- (CH2) m-COOM or a salt thereof; (ii)10 to 80 weight percent of an alcohol alkoxylate of the formula R2- (AO) n; wherein R1 is an alkyl or alkenyl group of 7 to 21 carbon atoms, X is a hydrogen atom or a methyl group, Y is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 carboxyalkyl group or a C1-C4 aminoalkyl group, M is 0 or 1, M is a proton, an alkali metal cation or a quaternary ammonium cation, R2 is an alkyl group of 6 to 20 carbon atoms, AO is each independently an ethylene oxide or propylene oxide, provided that at least a portion of AO is ethylene oxide, n is greater than 2 and up to 25, the weight percents being based on the total weight of the composition.
Description
The present invention relates to an improved collector composition for treating non-sulfidic ores, such as phosphate ore or calcite ore, said composition comprising an N-acylated amino acid and a non-ionic surfactant.
Froth flotation is a physicochemical process for separating mineral particles considered to be of economic value from mineral particles considered to be waste. The method is based on the ability of gas bubbles to attach to those particles that have been rendered hydrophobic beforehand. The particle-bubble combination then floats up to the froth phase, thereby exiting the flotation cell, while the hydrophilic particles remain in the flotation cell. Rather, a special chemical called a collector causes the hydrophobicity of the particles. In a direct flotation system, the economically valuable minerals are rendered hydrophobic by the collector. Similarly, in reverse flotation systems, collectors impart hydrophobicity to mineral particles considered waste. The efficiency of the separation process is quantified by recovery and grade (grade). Recovery refers to the percentage of the useful components contained in the ore that move into the concentrate stream after flotation. Grade refers to the percentage of economically valuable components in the concentrate after flotation. Higher recovery or grade values indicate a more advantageous flotation system. Generally, for a collector to be of commercial value, the lowest grade is achieved and the highest possible recovery is achieved at this lowest grade. In the collector composition, generally, the auxiliary collector is mainly responsible for improvement of recovery rate, efficiency, foaming property, and the like, and the main collector is responsible for selectivity.
On the one hand, the selective collectors are used to separate the valuable minerals from the gangue in large quantities, and on the other hand, the combination of both, by virtue of the froth properties, allows the froth flotation process to achieve good performance. Foam characteristics include both foam quantity and foam stability. It is important in the flotation process that the froth break up as quickly as possible after leaving the flotation cell and entering the next step in the beneficiation process. Too stable foam can lead to entrained particles and foam product pumping problems. Entrainment, particularly large scale entrainment, results in reduced selectivity (grade, recovery). Froth product pumping problems can make the flotation process technically impractical.
Of course, this method of treating ore would also be considered more advantageous if less collector composition needs to be used per tonne of ore.
Collector compositions comprising N-acylated amino acids and their use in treating non-sulfidic ores are known in the art.
T Karlkvist et al, Journal of Colloid and Interface Science 445(2015) at pages 40-67, "Flotation selection of novel alkyl dibasic carboxylate reagents for application-calcium separation," disclose the use of dodecyl N-acylated-glycine, -glutamic acid, -aspartic acid and-malonic acid in apatite and calcite Flotation.
J Beger et al in Tenside Detergents 23(1986)3, "Mehrfurktionele N-Tenside" disclose several N-acylated glycine, sarcosine and alanine compounds and their use for treating fluorite ores.
WO 2016/155966 and WO 2014/040686 disclose the use of N-acylated sarcosinates in flotation of non-sulfidic ores. In both said documents, the collector composition also comprises fatty acids, but does not disclose the addition of any other surface-active chemical substance.
FR 1,256,702 and CA 659535 disclose mineral froth flotation using a trapping mixture comprising sodium cocoyl sarcosinate and another surfactant. Another surfactant in an embodiment may be an alkylphenol polyoxyethylene ether (alkylphenol ether), such as ethoxylated nonylphenol.
CN 1919466 discloses a collector for ilmenite flotation, wherein a mixture of sodium oleoyl sarcosinate and an emulsifier is used, which may be an ethoxylated alkylphenol, such as Triton X-100.
Based on environmental considerations, the industry is seeking alternatives to ethoxylated alkylphenols. This is not straightforward, since ethoxylated alkylphenols have good collector properties, and any compound that replaces them should also have, or at least nearly achieve, these properties. At the same time, the industry has also been working to develop collector compositions that provide good mineral grade and high recovery in the flotation process.
DE 4105384 discloses the use of N-acyl oligoglycinates in the flotation of phosphate ores. CN108889453 discloses the use of palmitoylglycine in flotation of zinc-containing ores.
WO 2018/114741 discloses the use of N-acyl glycinates in combination with low ethoxylated fatty acids to increase selectivity in non-sulphide ore flotation.
WO 2015/000913 discloses the use of N-acyl glycinates in the flotation of non-sulphide ores. The collector compositions disclosed contain, in addition to glycinate, fatty acids, lactic acid and lactates of N-acyl glycines and fatty acids.
It has now been found that the addition of a nonionic surfactant to an N-acylated amino acid compound improves the recovery of a desired mineral, such as phosphate rock, and allows for more efficient froth flotation processes, for example, at lower collector dosages.
Accordingly, the present invention provides a collector composition suitable for use in the treatment of non-sulfidic ores, comprising:
(i)1 to 50% by weight of an N-acylated amino acid of formula R1-CO-NX-CYH- (CH2) m-COOM or a salt thereof;
(ii)10 to 80% by weight of an alcohol alkoxylate of the formula R2- (AO) n;
wherein R1 is an alkyl or alkenyl group of 7 to 21 carbon atoms, X is a hydrogen atom or a methyl group, Y is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 carboxyalkyl group or a C1-C4 aminoalkyl group, M is 0 or 1, M is a proton, an alkali metal cation or a quaternary ammonium cation, R2 is an alkyl group of 6 to 20 carbon atoms, AO is each independently an ethylene oxide or propylene oxide, with the proviso that at least a portion of AO is ethylene oxide, and n is greater than 2 and up to 25, weight percent based on the total weight of the composition.
It should be noted that alkyl and alkenyl groups are aliphatic groups that do not contain aromatic units in their structure (such as aryl, aralkyl or alkaryl units).
It should be noted that WO 2015/000913 proposes to add several other flotation additives to the collector composition disclosed therein, including also alcohol ethoxylates and alcohol propoxylates, but does not mention what alcohol ethoxylates are used, their amounts and the effect obtainable by addition to the collector composition, but merely treats them as foam regulators.
The present inventors have now recognized that the addition of an appropriate amount of an alcohol alkoxylate to a collector composition containing an N-acylated amino acid can increase the recovery of the desired mineral and, at least in terms of the collector composition being added in a lower dosage, can increase the efficiency of the flotation process. In fact, the alcohol alkoxylate acts as a co-collector in the N-acylated amino acid based system, which has not been disclosed before.
The collector compositions and processes of the invention provide unexpectedly good recovery at the grades commonly sought in the industry. For example, for phosphate ore treatment, the industry generally seeks to achieve 36% to 40% P2O5Preferably 38% to 40% P2O5And strives to achieve as high a recovery as possible at said grade.
The compositions of the invention are also characterized by providing a well balanced froth, i.e., a froth that is sufficiently stable and high to enable a good flotation process, but not so stable that the entrained particles or phases are difficult to handle. Surprisingly, it was found that the presence of the alkoxylated alcohol not only plays a role in foam height and stability, and thus in flotation process efficiency (especially when used in large amounts), but also equally in the coexistence of compounds (i) and (ii) or in other words in the equilibrium between the two compounds.
In a preferred embodiment, n is from 3 to 15, more preferably from 4 to 15, even more preferably from 5 to 12.
In embodiments of the invention, two or more compounds (i) and/or (ii) may be present in the collector composition. If two or more compounds (ii) are present in the collector composition, an average degree of alkoxylation of from 4 to 15 is preferred.
As mentioned above, the AO group in the compound (ii) may be a pure Ethyleneoxy (EO) group or a combination of an Ethyleneoxy (EO) unit and a Propyleneoxy (PO) unit. Preferably, the amount of propyleneoxy units in compound (ii) is from 0 to 5% of the total amount of Alkyleneoxy (AO) units.
The invention also provides the use of the collector composition described above for the treatment of non-sulphide ores, preferably phosphorus-containing and/or calcite ores, even more preferably calcite ores, and a process for the treatment of non-sulphide ores, preferably phosphorus ores or calcite ores, which process comprises a flotation step in which the ground ore is floated in the presence of the collector composition described above.
In a preferred embodiment, m in compound (i) is 0.
As noted above, M can be hydrogen, an alkali metal cation, or a quaternary ammonium cation. Suitable quaternary ammonium cations are ammonium cations in which the nitrogen atom contains 4 substituents, which 4 substituents can each independently be an alkyl group of up to 3 carbon atoms or a hydrogen atom. Suitable alkali metal cations are sodium and potassium.
In another preferred embodiment, in the collector composition of the invention, Y in compound (i) is hydrogen or C1-C4 alkyl.
More preferably, the unit NX-CYH- (CH2) m-COOM in the structural formula of compound (i) is derived from one of the amino acids glycine, sarcosine, alpha-alanine, beta-alanine, valine, leucine, isoleucine, most preferably from glycine or methylglycine, since glycine salts were found to provide the best recovery and grade even at low doses.
In another preferred embodiment, in the collector composition of the invention, R2 in compound (ii) is derived from a C10-C16 fatty alcohol R2-OH, and in yet another preferred embodiment, the unit R2 has a degree of branching of 0.2-3.5, even more preferably 0.5-3.0, most preferably 1-2.5. Even more preferably, R2 is derived from an alcohol R2-OH comprising at least 50 wt.% up to 100 wt.% primary alcohols (more preferably 90-100 wt.% primary alcohols).
In a further preferred embodiment, in the collector composition of the invention, R1-CO-in compound (i) is a C12-C18 acyl unit, and in a further preferred embodiment, R1 has a degree of branching of from 0 to 1. R1 is preferably an aliphatic alkyl or alkenyl chain. In embodiments, R1 may be unsaturated, i.e., contain one or more double bonds. Preferably, the number of double bonds in the R1-CO-unit is from 0 to 3, even more preferably from 1 to 2. In a preferred embodiment, the R1-CO-group is derived from fatty acids, such as may be derived from natural fats and oils.
Preferably, the collector composition of the present invention comprises from 2 to 40% by weight of compound (i) and from 20 to 80% by weight of compound (ii), even more preferably from 5 to 20% by weight of compound (i) and from 30 to 60% by weight of compound (ii).
In alkyl groups such as R1 or R2, and similarly in alkenyl groups, the degree of branching is determined by adding 2 to each carbon atom bound to four carbon atoms and adding 1 to all carbon atoms bound to three carbon atoms. For primary alkyl groups, "degree of branching" (DB), as used herein, refers to the total number of (terminal) methyl groups present on the R1 and/or R2 alkyl (alkenyl) chain minus 1 (the side chain is an alkyl group other than the methyl group counted as the terminal methyl group). For secondary alkyl, the same calculation can be used, but DB is the total number of methyl groups minus 2. It should be noted that in the present document the degree of branching is the average of the alkyl groups R1 and R2 present in compounds (i) and/or (ii) in the collector composition and thus does not have to be an integer. This is because the polyols or fatty acids which can be used to provide the groups R1 and R2 are not pure compounds but are present in the form of several different compounds or mixtures of isomers.
The collector composition of the invention may additionally comprise other components, for example selected from: a fatty acid; alkyl benzene sulfonate; an alkyl phosphate; an alkyl sulfate; alkyl sulfosuccinates; alkyl sulfosuccinates; an alkyl lactate; alkyl hydroxamates; a surface active amphoteric component selected from the group consisting of betaines, sultaines, aminocarboxylates, aminosulfonates; a non-ionic component selected from alkylamides, alkoxylated fatty acids, preferably ethoxylated fatty acids having a low degree of alkoxylation, even more preferably having a low degree of ethoxylation, wherein low represents 1 to 5 alkyleneoxy groups (respectively ethylene oxide units), an alkoxylated alcohol of formula R3- (AO) n, wherein n is at most 2 and comprises 2, R3 is the same (aliphatic) alkyl group as R2 and may be different from or the same as R2 in compound (ii), AO is each an alkoxylate, preferably an ethoxylate).
Preferred collector compositions of the invention additionally comprise from 1 to 70% by weight, preferably from 15 to 60% by weight, of a co-collector compound which is an anionic surface-active compound, for example those selected from the group consisting of fatty acids, alkylbenzenesulfonates, alkylphosphates, alkylsulfates, alkylsulfosuccinates, alkyl lactates and alkylhydroxamates, optionally containing, for each anionic surface-active compound, an alkoxylate group, for example an ethoxylate group, on the alkyl radical.
In another preferred embodiment, the collector composition of the invention additionally comprises from 3 to 50% by weight, preferably from 5 to 30% by weight, of fatty acids (having up to 2 ethylene oxide units), and/or from 1 to 30% by weight, preferably from 2 to 25% by weight, of alcohols R3- (AO) n (having up to 2 ethylene oxide units).
In one embodiment, the ore processing method according to the invention comprises the steps of:
conditioning the slurried ore in an aqueous solution to form a mixture;
optionally concentrating the mixture by magnetic separation;
optionally adding a foaming agent to the mixture;
optionally conditioning the mixture with a flotation depressant or a flotation activator;
optionally adjusting the pH of the mixture;
adding a collector composition of the invention;
optionally adding additional flotation aids to the mixture; and
froth flotation is performed to recover minerals by introducing air into the mixture and skimming froth formed therein.
The process and collector composition of the invention may include other additives and adjuvants typically present in froth flotation processes, either added simultaneously or preferably added separately during the flotation process. Other additives that may be present in the flotation process are depressants (e.g. starch, dextrin, aquilaria sinensis), dispersants (e.g. water glass), frothers/foam regulators/foam modifiers/defoamers, and pH regulators (e.g. NaOH).
The pH in the process is preferably an alkaline pH, even more preferably from 8 to 11.
In a preferred embodiment, the process is a positive froth flotation process for recovering phosphate ore.
In another aspect, the invention relates to a mineral slurry comprising a crushed ground ore, a primary collector or collector composition as defined herein, and optionally other flotation aids. The pulp may be prepared as follows: the ore is first ground and then the collector composition is added, or at least a portion of the collector composition is added to the ore and the ore is ground into a pulp in the presence of at least a portion of the collector composition.
Ores that may be used in the process of the present invention may include other minerals besides phosphorus and/or calcite. The mineral composition of most deposits in the world is generally similar, differing only in the percentage of each mineral present, which varies according to its origin. Other minerals present in the ore may be different types of silicates, iron-containing minerals, magnesium-containing minerals and fluorite. Preferably the phosphate ore is apatite ore.
The amount of collector used in the process of the invention depends on the amount of impurities present in the ore and the desired separation effect, and in some embodiments is 100-.
The invention is illustrated by the following examples.
Examples
General procedure for flotation and frothing
The flotation feed (500g dry material) was ground in a ball mill (5kg charge) for 5min and deslimed.
Flotation was carried out at 20 ℃ using a 1:1 mixture of process water and fresh water, the process water containing 25.6mg/L CaCl2*2H2O、336.1mg/L MgSO4*7H2O、63.9mg/l CaSO4*2H2O、419.2mg/L NaHCO3And 107.6mg/L NaSO4。
The flotation process comprises the following steps:
1. the pulp was mixed for 1 min.
2. Soda was added to the flotation cell (400g/t) and further conditioning (3min) was carried out.
3. Water glass was added to the flotation cell (200g/t) and further conditioned (3 min).
4. Simultaneously, a collector solution (in the form of a 1 wt% aqueous solution) was added and conditioned for 2 min.
5. Flotation water was injected into the tank to the mark level (37% solids).
6. Simultaneously, the ventilation and the automatic skimmer are started.
7. The rougher flotation was continued for 4 minutes. Water is continuously added to maintain a suitable pulp level.
8. The collected rougher flotation froth was transferred to a 0.6L flotation cell, prepared flotation water was injected to mark water level, and froth rinse was performed for 3min as described in 6 and 7 above.
9. The froth collected from the flotation rinse step was transferred to a 0.3L flotation cell, water was added to the mark water level, and the froth was re-rinsed for 2min in the manner described in 6 and 7 above.
10. The tailings, slimes and concentrates obtained in the roughing, washing and rewashing steps were collected, dried and analyzed for P by XRF method2O5And the content of MgO.
TABLE 1 flotation machine parameters
The feed for the foaming test (500g dry material) was ground in a rod mill (6.2kg charge) for 10 min. The pulp was placed in the cylindrical tank of a bubbler and diluted to 37% solids. The pulp was then conditioned with 200g/t sodium silicate (2min), 200g/t soda (2min) and the required dose of collector (6 min). The foaming test was started by adding 3.5L/min of air to the tank and after 300s the aeration was stopped to observe the height and stability of the foam formed.
Composition of ore
Flotation separation:
standard ore (I) by magnetic separation
P2O5–9.6％、MgO–20.4％、SiO2-20.5％、Fe-3.2％
Standard ore (II) by magnetic separation
P2O5–10.7％、MgO–17.0％、SiO2-24.5％、Fe-3.0％
Standard ore (III) by magnetic separation
P2O5–12.1％、MgO–0.7％、SiO2-33.46％、Al2O3-15.05％、Fe-1.89％
Example 1
The froth flotation process was carried out according to the above procedure and using the above ore I, in the amounts of compound (I) shown in table 2 below:
tall oil based glycinate; and
compound (ii):
c13 alcohol ethoxylate having a degree of ethoxylation of about 10 was prepared by reacting the C13 primary alcohol, Exxal 13 from Exxon Mobil, having a DB of about 3.0, with 10 molar equivalents of ethylene oxide.
Furthermore, in this example, tall oil fatty acid was used as the co-collector, low ethoxylated tall oil fatty acid (degree of ethoxylation of about 1) as the selectivity modifier, and low ethoxylated C13 alcohol (degree of ethoxylation of about 2, produced by reaction of Exxal 13 with 2 molar equivalents of ethylene oxide) as the additive to improve process efficiency.
TABLE 2 comparison of several collector compositions
When the total amount is less than 100% by weight, the balance is the aqueous solvent
The results show that significantly higher recovery (up to + 5.3%) can be obtained when appropriate amounts of compound (i) in combination with compound (ii), in this example tall oil based N-acyl glycine ester in combination with ethoxylated C13 branched alcohol. It was further demonstrated that the addition of anionic surfactant as the other collector component further improved the recovery.
Example 2
Performing a froth flotation process according to the above process and using the above ore II
Compound (i):
the same tall oil based glycinate as in example 1, in the amounts shown in table 3 below; and
compound (ii):
the same highly ethoxylated C13 alcohol (degree of ethoxylation about 10) as in example 1 was used in the amounts shown in table 3 below.
In addition, tall oil fatty acids were used as co-collectors, some tall oil fatty acids with a degree of ethoxylation of about 1 were added as selectivity modifiers in some examples, and some ethoxylated C13 alcohols with a degree of ethoxylation of about 2 were added as efficiency boosters.
TABLE 3 comparison of several collector compositions
When the total amount is less than 100% by weight, the balance is the aqueous solvent
The results clearly show that the use of compound (ii) according to the invention alone results in a poor recovery. The results further demonstrate that the use of compound (i) alone results in a poor grade. The invention offers the possibility of obtaining good recovery and grade simultaneously. The collector compositions of the invention are rated just below industry targets, but the process can be optimized to reach this range by, for example, further adjusting the total amount of collector composition and additives and fine tuning the process parameters.
In comparative example 2a the froth formation is rather limited, which makes the flotation process less than optimal, whereas in comparative example 2b the froth is so stable that the process is more difficult to adjust. Thus, it has also been found that the balance between compounds (i) and (ii) is important to obtain a system that can be treated in a froth flotation process without additional steps, since the froth has suitable properties, such as sufficient froth formation, that the froth is not so stable that the flotation process cannot be adjusted.
Example 3
Performing a froth flotation process according to the above process and using the above ore III
Compound (i):
the same tall oil based glycinate as in example 1, in the amounts shown in table 4 below;
compound (ii):
the same highly ethoxylated C13 alcohol (degree of ethoxylation about 10) as in example 1 was used in the amounts shown in table 4 below; and
compound (iii):
highly ethoxylated (10EO) C13 nonylphenol prepared by reacting nonylphenol from Sigma Aldrich with 10 molar equivalents of ethylene oxide was used for comparison in parallel experiments.
In addition, tall oil fatty acid was used as a co-collector, and some tall oil fatty acid with a degree of ethoxylation of about 1 was added as a selectivity modifier.
In both the comparative and inventive examples, the grade of the second concentrate was within the desired range of 38-40%.
Table 4 comparison of two collector compositions
When the total amount is less than 100% by weight, the balance is the aqueous solvent
The results show that the use of compound (ii) results in a significant improvement in recovery compared to the use of ethoxylated nonylphenol compound (iii) for the industry preferred grade of 38-40%. The present invention offers the possibility of obtaining excellent recovery and grade. Furthermore, the use of alkyl ethoxylates instead of nonylphenol ethoxylates could better comply with environmental regulations.
Claims (13)
1. A collector composition suitable for use in treating non-sulfidic ores, comprising:
(i)1 to 50% by weight of an N-acylated amino acid of formula R1-CO-NX-CYH- (CH2) m-COOM or a salt thereof;
(ii)10 to 80 weight percent of an alcohol alkoxylate of the formula R2- (AO) n;
wherein R1 is an alkyl or alkenyl group of 7 to 21 carbon atoms, X is a hydrogen atom or a methyl group, Y is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 carboxyalkyl group or a C1-C4 aminoalkyl group, M is 0 or 1, M is a proton, an alkali metal cation or a quaternary ammonium cation, R2 is an alkyl group of 6 to 20 carbon atoms, AO is each independently an ethylene oxide or propylene oxide, provided that at least a portion of AO is ethylene oxide, n is greater than 2 and up to 25, the weight percents being based on the total weight of the composition.
2. The collector composition of claim 1 wherein Y is hydrogen or C1-C4 alkyl.
3. The collector composition of claim 1 or 2 wherein R2 is derived from a C10-C16 fatty alcohol.
4. The collector composition of any of claims 1 to 3 wherein the degree of branching of R2 is from 0.2 to 3.5.
5. The collector composition of any of claims 1 to 4 wherein m is 0, X is hydrogen and Y is hydrogen or methyl, preferably hydrogen.
6. The collector composition of any of claims 1-5 comprising 5 to 15 wt% of compound (i) and 30 to 60 wt% of compound (ii), the wt% based on the total weight of the composition.
7. The collector composition of any of claims 1 to 6 wherein n is 4 to 15.
8. The collector composition according to any of claims 1 to 7, further comprising one or more components selected from the group consisting of fatty acids, alkyl benzene sulfonates, alkyl phosphates, alkyl sulfates, alkyl sulfosuccinates, alkyl lactates, alkyl hydroxamates, alkyl amides, surface active amphoteric components, such as those selected from the group consisting of: betaines, sulfobetaines, aminocarboxylates, aminosulfonates, ethoxylated fatty acids, alkoxylated alcohols of the formula R3- (AO) n wherein n is up to 2 and including 2.
9. The collector composition of any of claims 1 to 8 further comprising from 1 to 70 wt% of a co-collector compound which is an anionic surface active compound, for example selected from the group consisting of fatty acids, alkylbenzene sulfonates, alkyl phosphates, alkyl sulfates, alkyl sulfosuccinates, alkyl lactates and alkyl hydroxamates, the wt% based on the total weight of the composition.
10. The collector composition of any of claims 1-9 further comprising from 3 to 50 wt.% of a fatty acid having up to 2 ethylene oxide units, and/or from 1 to 30 wt.% of an alcohol having up to 2 ethylene oxide units, the wt.% based on the total weight of the composition.
11. Use of a collector composition according to any one of claims 1 to 10 for the treatment of non-sulfidic ores, preferably phosphorite or calcite ores.
12. A process for treating non-sulphide ores, preferably phosphate ores or calcite ores, comprising a flotation step in which the ground ore is subjected to flotation in the presence of a collector composition according to any of claims 1-10.
13. The method of claim 12, comprising the steps of:
conditioning the slurried ore in an aqueous solution to form a mixture;
optionally concentrating the mixture by magnetic separation;
optionally adding a foaming agent to the mixture;
optionally conditioning the mixture with a flotation depressant or a flotation activator;
optionally adjusting the pH of the mixture;
adding a collector composition according to any one of claims 1 to 10;
optionally adding additional flotation aids to the mixture; and
froth flotation is performed to recover minerals by introducing air into the mixture and skimming froth formed therein.
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| PCT/EP2020/060896 WO2020212592A1 (en) | 2019-04-19 | 2020-04-17 | Collector compositions containing a n-acylated amino acid and process to treat non-sulfidic ores |
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| CN117065937A (en) * | 2023-08-24 | 2023-11-17 | 东北大学 | A low-grade lepidolite flotation combination collector and its application |
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| FR1256702A (en) * | 1959-03-13 | 1961-03-24 | Process for flotation of mineral matter using collecting mixtures | |
| CN86101573A (en) * | 1985-11-29 | 1987-06-03 | 陶氏化学公司 | The novel collector that is used for the mineral froth flotation |
| DE4105384A1 (en) * | 1990-02-28 | 1991-08-29 | Hoechst Ag | Selective flotation of phosphorus minerals - by using an N-acylated protein, peptide or penicillin hydrolysate as collector |
| CN1919466A (en) * | 2006-01-23 | 2007-02-28 | 攀枝花钢铁有限责任公司钛业分公司 | Collector for flotation collecting ilmenite and its preparation method |
| CN101578140A (en) * | 2006-12-06 | 2009-11-11 | 国际壳牌研究有限公司 | Normal and iso-paraffins with low aromatics, sulphur and nitrogen content for use as froth flotation collectors |
| US20160304663A1 (en) * | 2013-12-18 | 2016-10-20 | Akzo Nobel Chemicals International B.V. | Polyester Polyquaternary Ammonium Compound Collectors For Reverse Froth Flotation Of Silicates From Nonsulfidic Ores |
| CN107073482A (en) * | 2014-09-18 | 2017-08-18 | 阿克苏诺贝尔化学品国际有限公司 | Use of branched alcohols and their alkoxylates as secondary collectors |
| CN105002021A (en) * | 2015-07-12 | 2015-10-28 | 张小龙 | Cleaner for household articles |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117065937A (en) * | 2023-08-24 | 2023-11-17 | 东北大学 | A low-grade lepidolite flotation combination collector and its application |
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| CN113692318B (en) | 2023-06-06 |
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