CN113692318B - Collector composition comprising N-acylated amino acids and method of treating non-sulfidic ores - Google Patents
Collector composition comprising N-acylated amino acids and method of 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 the formula R1-CO-NX-CYH- (CH 2) m-COOM or a salt thereof; (ii) 10 to 80 wt.% 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 ethyleneoxy or propyleneoxy group, provided that at least a portion of AO is ethyleneoxy, n is greater than 2 and up to 25, the weight percentages 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 ores or calcite ores, comprising an N-acylated amino acid and a nonionic surfactant.
Froth flotation is a physicochemical process for separating mineral particles that are considered to be economically valuable from mineral particles that are considered to be waste. The method is based on the ability of bubbles to adhere to those particles that have been previously rendered hydrophobic. The particle-bubble combination then floats up to the froth phase, thereby exiting the flotation tank, while the hydrophilic particles remain in the flotation tank. Instead, a special chemical, called a collector, causes the hydrophobicity of the particles. In a positive flotation system, economically valuable minerals are rendered hydrophobic by the action of a collector. Similarly, in reverse flotation systems, the collector imparts hydrophobicity to the mineral particles that are considered waste. The efficiency of the separation process is quantified by recovery and grade (grade). Recovery refers to the percentage of useful components contained in the ore that are moved 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 that the flotation system is more advantageous. In general, for collectors of commercial value, it is desirable to achieve the lowest grade and as high a recovery as possible at this lowest grade. In the collector composition, usually, the auxiliary collector is mainly responsible for improving recovery rate, efficiency, foaming property, and the like, and the main collector is responsible for selectivity.
On the one hand, the use of selective collectors for the bulk separation of useful minerals from gangue and, on the other hand, the combination of the two gives the froth flotation process excellent performance by virtue of the froth characteristics. Foam characteristics include both foam quantity and foam stability. It is important in the flotation process that the froth breaks as soon as possible after leaving the flotation cell and entering the next step of the beneficiation process. Too stable foam can lead to entrained particles and foam product pumping problems. Entrainment, particularly large scale entrainment, can lead to reduced selectivity (grade, recovery). The problem of froth product pumping can make the flotation process technically impractical.
Of course, this method of treating ore would be considered more advantageous if less collector composition per ton of ore would be required.
Collector compositions comprising N-acylated amino acids and their use in treating non-sulfidic ores are known in the art.
T Karlkvist et al, in Journal of Colloid and Interface Science 445 (2015) pages 40-67, "Flotation selectivity of novel alkyl dicarboxylate reagents for apatite-calcite separation," disclose the use of dodecyl N-acylated-glycine, -glutamic acid, -aspartic acid, and-malonic acid in apatite and calcite ore flotation.
J Beger et al, in Tenside Detergents (1986) 3, "Mehrfunktionele N-Tenside", disclose several N-acylated glycine, sarcosine and alanine compounds and their use in the treatment of fluorite ores.
WO 2016/155966 and WO 2014/040686 disclose the use of N-acylated sarcosinates in non-sulphide ore flotation. In both documents, the collector composition also comprises fatty acids, but the addition of any other surface-active chemical is not disclosed.
FR 1,256,702 and CA 659535 disclose mineral froth flotation using a collection mixture comprising cocoyl sarcosinate and another surfactant. Another surfactant in embodiments may be alkylphenol ethoxylates (alkylphenoxypolyglycol ether), such as ethoxylated nonylphenol.
CN 1919466 discloses a collector for ilmenite flotation, wherein a mixture of 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 compounds that replace them should also have, or at least nearly reach, these properties. At the same time, the industry is also working to develop collector compositions that provide good mineral grade and high recovery in flotation processes.
DE 4105384 discloses the use of N-acyl oligoglycinates in the flotation of phosphorus ores. CN108889453 discloses the use of palmitoylglycine in zinc ore flotation.
WO 2018/114741 discloses the use of N-acyl glycinates in combination with low ethoxylated fatty acids to improve selectivity in non-sulphide ore flotation.
WO 2015/000913 discloses the use of N-acyl glycinates in non-sulphide ore flotation. The disclosed collector composition contains fatty acids, lactic acid, and lactate esters of N-acyl glycine and fatty acids in addition to glycinates.
It has now been found that the addition of a nonionic surfactant to an N-acylated amino acid compound can increase the recovery of the desired mineral, such as phosphate rock, and can more effectively perform froth flotation processes, for example, at lower collector dosages.
Thus, the present invention provides a collector composition suitable for treating non-sulfidic ores comprising:
(i) 1 to 50% by weight of an N-acylated amino acid of the formula R1-CO-NX-CYH- (CH 2) m-COOM or a salt thereof;
(ii) 10 to 80 wt.% of an alcohol alkoxylate of the formula R2- (AO) n (alcohol alkoxylate, fatty alcohol polyalkoxyether);
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 ethyleneoxy or propyleneoxy group, provided that at least a portion of AO is ethyleneoxy, 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 (e.g., aryl, aralkyl, or alkaryl units) in their structure.
It should be noted that WO 2015/000913 proposes the addition of several other flotation additives to the collector composition disclosed therein, including alcohol ethoxylates and alcohol propoxylates as well, but does not mention what alcohol ethoxylates are used, their amounts and the effects obtainable by addition to the collector composition, but only treats it as a foam regulator.
The present invention has 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 can increase the efficiency of the flotation process, at least in terms of the collector composition being added at a lower dosage. In fact, the alcohol alkoxylates act as co-collectors in N-acylated amino acid based systems that have not been previously disclosed.
The collector compositions and methods of the present invention provide unexpectedly good recovery at the levels commonly sought in the industry. For example, for phosphate rock treatment, the industry generally seeks to reach 36% to 40% P 2 O 5 Preferably 38% to 40% P 2 O 5 And strive for atThe recovery rate is as high as possible at the grade.
The composition of the invention is also characterized by providing froth that is well balanced, i.e. stable and high enough to achieve a good flotation process, but not so stable that entrained particles or phases are difficult to handle. Surprisingly, it was found that the presence of alkoxylated alcohols not only plays a role in the froth height and stability and thus in the efficiency of the flotation process, especially when used in large amounts, but also in the coexistence of compounds (i) and (ii) or in other words in the balance between the two compounds.
In a preferred embodiment n is 3 to 15, more preferably 4 to 15, even more preferably 5 to 12.
In embodiments of the present invention, two or more compounds (i) and/or (ii) may be present in the collector composition. If more than two compounds (ii) are present in the collector composition, it is preferred that the average degree of alkoxylation is from 4 to 15.
As described above, the AO group in compound (ii) may be pure Ethyleneoxy (EO) or a combination of Ethyleneoxy (EO) units and Propyleneoxy (PO) units. Preferably, the amount of propyleneoxy units in compound (ii) is 0-5% of the total amount of Alkyleneoxy (AO) units.
The invention also provides the use of the above collector composition for the treatment of non-sulphide ores, preferably phosphorus-and/or calcite-containing ores, even more preferably calcite ores, and a method of treating non-sulphide ores, preferably phosphorus ores or calcite ores, comprising a flotation step in which ground ore is floated in the presence of the above collector composition.
In a preferred embodiment, m in compound (i) is 0.
As described above, M may 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 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, Y in compound (i) is hydrogen or C1-C4 alkyl in the collector composition of the present invention.
More preferably, the unit NX-CYH- (CH 2) m-COOM in the structural formula of compound (i) is derived from one of the amino acids glycine, sarcosine, α -alanine, β -alanine, valine, leucine, isoleucine, most preferably from glycine or methylglycine, since glycinates are found to provide optimal recovery and taste even at low doses.
In another preferred embodiment, in the collector composition of the present invention, R2 in compound (ii) is derived from a C10-C16 fatty alcohol R2-OH, and in yet another preferred embodiment, unit R2 has a branching degree 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% by weight up to 100% by weight primary alcohol (more preferably 90-100% by weight primary alcohol).
In a further preferred embodiment, in the collector composition according to the invention, R1-CO-in compound (i) is a C12-C18 acyl unit, and in a further preferred embodiment R1 has a branching degree of 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-units 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 2 to 40% by weight of compound (i) and 20 to 80% by weight of compound (ii), even more preferably comprises 5 to 20% by weight of compound (i) and 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, as used herein, "degree of branching" (DB) refers to the total number of (terminal) methyl groups present on the R1 and/or R2 alkyl (alkenyl) chains minus 1 (the side chain is an alkyl group other than the methyl group counted as the terminal methyl group). For secondary alkyl groups, the same calculation may be used, but DB is the total number of methyl groups minus 2. It should be noted that in the present specification, the degree of branching is the average value of the alkyl groups R1 and R2 present in the compounds (i) and/or (ii) in the collector composition, and thus is not necessarily an integer. This is because the alcohols or fatty acids that can be used to provide the groups R1 and R2 are not pure compounds, but are present as a mixture of several different compounds or isomers.
The collector composition of the present invention may additionally comprise other components selected, for example, from the group consisting of: a fatty acid; alkylbenzene sulfonate; alkyl phosphates; alkyl sulfate; alkyl sulfosuccinates; alkyl sulfosuccinates; alkyl lactate; alkyl hydroxamates; a surface active amphoteric component selected from the group consisting of betaines, sulfobetaines, aminocarboxylates, sulfamates; a nonionic 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 from 1 to 5 alkylene oxides (respectively ethylene oxide units), alkoxylated alcohols of the formula R3- (AO) n, wherein n is up to 2 and comprises 2, R3 is the same as R2 as (aliphatic) alkyl and may be different 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 an auxiliary collector compound which is an anionic surface-active compound, for example those selected from fatty acids, alkylbenzene sulphonates, alkyl phosphates, alkyl sulphates, alkyl sulphosuccinates, alkyl lactates and alkyl hydroxamates, optionally containing an alkoxylate group, for example an ethoxylate group, on the alkyl group for each anionic surface-active compound.
In another preferred embodiment, the collector composition of the present invention additionally comprises 3 to 50 wt%, preferably 5 to 30 wt% fatty acids (having up to 2 ethylene oxide units), and/or 1 to 30 wt%, preferably 2 to 25 wt% alcohols R3- (AO) n (having up to 2 ethylene oxide units).
In one embodiment, the ore processing method according to the present 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 suppressor or a flotation activator;
optionally adjusting the pH of the mixture;
adding the collector composition of the present invention;
optionally adding additional flotation aid 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 commonly found in froth flotation processes, either simultaneously or preferably separately during the flotation process. Other additives that may be present in the flotation process are inhibitors (e.g. starch, dextrin, aquilaria sinensis), dispersants (e.g. water glass), foaming agents/foam regulators/foam modifiers/defoamers, and pH regulators (e.g. NaOH).
The pH in the process is preferably an alkaline pH, even more preferably 8-11.
In a preferred embodiment, the process is a direct froth flotation process for recovering phosphate ore.
In another aspect, the invention relates to a pulp comprising crushed ground ore, a main 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 useful in the process of the present invention may include minerals other than phosphorus and/or calcite. The mineral composition of most deposits in the world is substantially similar, differing only in the percentage of the various minerals present, depending on their source. Other minerals present in the ore may be different types of silicates, iron-containing minerals, magnesium-containing minerals and fluorites. Preferably, the phosphorite is a phosphorite.
The amount of collector used in the process of the invention depends on the amount of impurities present in the ore and the separation effect desired, and in some embodiments is from 100 to 1000 g/ton dry ore, more preferably from 150 to 400 g/ton dry ore.
The invention is illustrated by the following examples.
Examples
General procedure for flotation and frothing
The flotation feed (500 g dry) was ground in a ball mill (5 kg charge) for 5min and desliming.
Flotation was performed at 20℃using a 1:1 mixture of process water (process water) and fresh water (fresh water), where the process water contains 25.6mg/L CaCl 2 *2H 2 O、336.1mg/L MgSO 4 *7H 2 O、63.9mg/l CaSO 4 *2H 2 O、419.2mg/L NaHCO 3 And 107.6mg/L NaSO 4 。
The flotation process is as follows:
1. the pulp was mixed for 1min.
2. Soda was added to the flotation tank (400 g/t) and further conditioned (3 min).
3. Water glass was added to the flotation cell (200 g/t) and further conditioned (3 min).
4. The collector solution (in the form of a 1 wt% aqueous solution) was added simultaneously and conditioned for 2min.
5. Flotation water was injected into the tank to the mark level (37% solids).
6. Simultaneously the aeration and automatic skimmer are turned on.
7. The coarse flotation was continued for 4 minutes. Water is continually added to maintain the proper pulp level.
8. The collected coarse flotation froth was transferred to a 0.6L flotation tank, the prepared flotation water was injected to the marked water level, and froth cleaning was performed for 3min in the manner described in 6 and 7 above.
9. The froth collected in the flotation rinse step was transferred to a 0.3L flotation tank, water was added to the marked water level and the froth was rinsed again for 2min in the manner described in 6 and 7 above.
10. Collecting, drying the tailings, slimes and concentrates obtained in the roughing, washing and re-washing steps and analyzing P by XRF method 2 O 5 And MgO content.
TABLE 1 flotation machine parameters
The feed (500 g dry stock) for the foaming test was ground in a rod mill (6.2 kg charge) for 10min. The slurry was placed in the cylindrical tank of the frother and diluted to 37% solids. Subsequently, the pulp was conditioned with 200g/t sodium silicate (2 min), 200g/t soda (2 min) and the required dose of collector (6 min). The bubbling test was started by adding 3.5L/min of air to the tank, and aeration was stopped after 300 seconds to observe the height and stability of the foam formed.
Ore composition
Floating mineral separation:
standard ore (I) separated magnetically
P 2 O 5 –9.6％、MgO–20.4％、SiO 2 -20.5％、Fe-3.2％
Magnetic separated standard ore (II)
P 2 O 5 –10.7％、MgO–17.0％、SiO 2 -24.5％、Fe-3.0％
Magnetic separated standard ore (III)
P 2 O 5 –12.1％、MgO–0.7％、SiO 2 -33.46％、Al 2 O 3 -15.05％、Fe-1.89％
Example 1
The froth flotation process was carried out according to the process described above and using the ore I described above, in the amounts of compound (I) shown in table 2 below:
tall oil based glycinate; and
compound (ii):
a C13 alcohol ethoxylate having a degree of ethoxylation of about 10, prepared by reacting C13 primary alcohol Exxal 13 having a DB of about 3.0 from Exxon Mobil with 10 molar equivalents of ethylene oxide.
Furthermore, in this example, a tall oil fatty acid (degree of ethoxylation of about 1) was used as a secondary collector, a low ethoxylated tall oil fatty acid (degree of ethoxylation of about 2) was used as a selectivity improver, and a low ethoxylated C13 alcohol (degree of ethoxylation of about 2, ex gal 13 reacted with 2 molar equivalents of ethylene oxide) was used as an additive to increase the process efficiency.
TABLE 2 comparison of several collector compositions
* If the addition is less than 100% by weight, the remainder is an aqueous solvent
The results show that when a suitable amount of a combination of compound (i) and compound (ii) is used, in this example, a combination of tall oil based N-acyl glycine ester with ethoxylated C13 branched alcohol, a significantly higher recovery (up to +5.3%) is obtained. It was further demonstrated that the addition of anionic surfactant as the other collector component further improved recovery.
Example 2
The froth flotation process was carried out according to the process described above and using the ore II described above, using
Compound (i):
the same tall oil based glycinate salt as in example 1 was used in the amounts shown in table 3 below; and
compound (ii):
the same highly ethoxylated C13 alcohol as in example 1 (degree of ethoxylation of about 10) was used in the amounts shown in Table 3 below.
In addition, using tall oil fatty acids as the secondary collector, some tall oil fatty acids having a degree of ethoxylation of about 1 are added as selectivity improvers in some embodiments, and some ethoxylated C13 alcohols having a degree of ethoxylation of about 2 are added as efficiency enhancers.
TABLE 3 comparison of several collector compositions
* If the addition is less than 100% by weight, the remainder is an aqueous solvent
The results clearly show that the use of only compound (ii) according to the invention results in poor recovery. The results further demonstrate that the use of compound (i) alone results in poor grade. The invention provides the possibility to obtain both good recovery and grade. The grade of the collector composition of the invention is just below industry goals, but the process can be optimized to achieve 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 was quite limited, which makes the flotation process less than optimal, whereas in comparative example 2b the froth was too stable to be adjustable. Thus, it has also been found that the balance between compounds (i) and (ii) is important to obtain a system that can be handled in a froth flotation process without additional steps, since the froth has suitable properties, such as sufficient froth formation, the froth is not so stable that the flotation process cannot be adjusted.
Example 3
The froth flotation process was carried out according to the process described above and using the ore III described above, using
Compound (i):
the same tall oil based glycinate salt as in example 1 was used in the amounts shown in table 4 below;
compound (ii):
the same highly ethoxylated C13 alcohol as in example 1 (degree of ethoxylation of about 10) was used in the amounts shown in Table 4 below; and
compound (iii):
highly ethoxylated (10 EO) 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 secondary collector, and some tall oil fatty acid having a degree of ethoxylation of about 1 was added as a selectivity improver.
In both the comparative example and the inventive example, the grade of the second concentrate was in the desired range 38-40%.
Table 4 comparison of two collector compositions
* If the addition is less than 100% by weight, the remainder is an aqueous solvent
The results show that the use of compound (ii) provides a significant improvement in recovery over the use of ethoxylated nonylphenol compound (iii) for an industry preferred grade of 38-40%. The present invention provides the possibility to obtain excellent recovery and grade. Furthermore, the use of alkyl ethoxylates instead of nonylphenol ethoxylates can better comply with environmental regulations.
Claims (16)
1. A collector composition suitable for treating non-sulfidic ores comprising:
(i) 1 to 50% by weight of an N-acylated amino acid of the formula R1-CO-NX-CYH- (CH 2) m-COOM or a salt thereof;
(ii) 10 to 80 wt.% 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 ethyleneoxy or propyleneoxy group, provided that at least a portion of AO is ethyleneoxy, n is 3 to 15, the weight percentages 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, wherein R2 is derived from a C10-C16 fatty alcohol.
4. The collector composition of claim 2, wherein R2 is derived from a C10-C16 fatty alcohol.
5. The collector composition of any of claims 1-4, wherein the degree of branching of R2 is 0.2-3.5.
6. The collector composition of any of claims 1-4, wherein m is 0, x is hydrogen, and Y is hydrogen or methyl.
7. The collector composition of any of claims 1-4, comprising 5 to 15 wt% of compound (i) and 30 to 60 wt% of compound (ii), the wt% being based on the total weight of the composition.
8. The collector composition of any of claims 1-4, wherein n is 4-15.
9. The collector composition of any of claims 1-4, further comprising one or more components selected from the group consisting of fatty acids, alkylbenzenesulfonates, alkyl phosphates, alkyl sulfates, alkyl sulfosuccinates, alkyl lactates, alkyl hydroxamates, alkylamides, surface active amphoteric components selected from those of: betaine, sulfobetaine, aminocarboxylate, sulfamate, ethoxylated fatty acid, alkoxylated alcohol of formula R3- (AO) n wherein n is up to 2 and includes 2.
10. The collector composition of any of claims 1-4, further comprising 1 to 70 wt% of a co-collector compound that is an anionic surface active compound selected from the group consisting of fatty acids, alkylbenzenesulfonates, alkyl phosphates, alkyl sulfates, alkyl sulfosuccinates, alkyl lactates, and alkyl hydroxamates, the wt% based on the total weight of the composition.
11. The collector composition of any of claims 1-4, further comprising 3 to 50 wt% fatty acids having up to 2 ethylene oxide units, and/or 1 to 30 wt% alcohols having up to 2 ethylene oxide units, the wt% based on the total weight of the composition.
12. Use of a collector composition according to any one of claims 1-11 for the treatment of non-sulfidic ores.
13. The use of claim 12, wherein the non-sulphide ore is a phosphate ore or a calcite ore.
14. A method of treating non-sulphide ores, the method comprising a flotation step in which ground ore is subjected to flotation in the presence of a collector composition according to any of claims 1 to 11.
15. The method of claim 14, wherein the non-sulfidic ore is a phosphate ore or a calcite ore.
16. The method of claim 14 or 15, 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 suppressor or a flotation activator;
optionally adjusting the pH of the mixture;
adding the collector composition of any one of claims 1-11;
optionally adding additional flotation aid to the mixture; and
froth flotation is performed to recover minerals by introducing air into the mixture and skimming froth formed therein.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP191703628 | 2019-04-19 | ||
| EP17003628 | 2019-04-19 | ||
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1146824B (en) * | 1959-03-13 | 1963-04-11 | Kloeckner Humboldt Deutz Ag | Process for the flotation of minerals with the help of collector mixtures |
| PH24537A (en) * | 1985-11-29 | 1990-08-03 | Dow Chemical Co | Collector composition for the froth flotation of mineral values |
| 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 |
| CN100388983C (en) * | 2006-01-23 | 2008-05-21 | 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 |
| RU2461426C2 (en) * | 2006-12-06 | 2012-09-20 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. | Normal and isoparaffins with low content of aromatic compounds, sulphur and nitrogen as collector for foam flotation |
| US10100146B2 (en) * | 2013-12-18 | 2018-10-16 | Akzo Nobel Chemicals International, B.V. | Polyester polyquaternary ammonium compound collectors for reverse froth flotation of silicates from nonsulfidic ores |
| EA033037B9 (en) * | 2014-09-18 | 2020-02-19 | Норион Кемикалз Интернэшнл Б.В. | Use of branched fatty alcohol alkoxylates as secondary collectors for froth flotation |
| CN105002021A (en) * | 2015-07-12 | 2015-10-28 | 张小龙 | Cleaner for household articles |
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