WO2008077849A1 - Amine formulations for reverse froth flotation of silicates from iron ore - Google Patents
Amine formulations for reverse froth flotation of silicates from iron ore Download PDFInfo
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- WO2008077849A1 WO2008077849A1 PCT/EP2007/064157 EP2007064157W WO2008077849A1 WO 2008077849 A1 WO2008077849 A1 WO 2008077849A1 EP 2007064157 W EP2007064157 W EP 2007064157W WO 2008077849 A1 WO2008077849 A1 WO 2008077849A1
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- Prior art keywords
- alkyl
- group
- process according
- carbon atoms
- straight
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000000203 mixture Substances 0.000 title claims abstract description 51
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 33
- 238000009472 formulation Methods 0.000 title claims abstract description 19
- 150000004760 silicates Chemical class 0.000 title claims abstract description 10
- 150000001412 amines Chemical class 0.000 title claims description 13
- 238000009291 froth flotation Methods 0.000 title abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 17
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 5
- 239000001257 hydrogen Substances 0.000 claims abstract description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 3
- 238000005188 flotation Methods 0.000 claims description 39
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexanol group Chemical group C(C)C(CO)CCCC YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 claims description 14
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229910001608 iron mineral Inorganic materials 0.000 claims description 8
- 230000000881 depressing effect Effects 0.000 claims description 6
- 150000003863 ammonium salts Chemical class 0.000 claims description 5
- 150000004676 glycans Chemical class 0.000 claims description 3
- 229920001282 polysaccharide Polymers 0.000 claims description 3
- 239000005017 polysaccharide Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims 1
- -1 alkyl ether diamine Chemical class 0.000 abstract description 43
- 150000003973 alkyl amines Chemical class 0.000 abstract description 6
- 150000005215 alkyl ethers Chemical class 0.000 abstract description 6
- VNWKTOKETHGBQD-AKLPVKDBSA-N carbane Chemical group [15CH4] VNWKTOKETHGBQD-AKLPVKDBSA-N 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 21
- 239000002245 particle Substances 0.000 description 17
- 238000011084 recovery Methods 0.000 description 13
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 11
- 229910052681 coesite Inorganic materials 0.000 description 10
- 229910052906 cristobalite Inorganic materials 0.000 description 10
- 229910052682 stishovite Inorganic materials 0.000 description 10
- 229910052905 tridymite Inorganic materials 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 238000005029 sieve analysis Methods 0.000 description 9
- 150000004985 diamines Chemical class 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 240000002791 Brassica napus Species 0.000 description 5
- 235000004977 Brassica sinapistrum Nutrition 0.000 description 5
- 244000068988 Glycine max Species 0.000 description 5
- 235000010469 Glycine max Nutrition 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 229920000768 polyamine Polymers 0.000 description 5
- 239000003760 tallow Substances 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 230000001627 detrimental effect Effects 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 125000001165 hydrophobic group Chemical group 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([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])[H] 0.000 description 3
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Natural products NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 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 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 125000001421 myristyl group Chemical group [H]C([*])([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])C([H])([H])[H] 0.000 description 2
- 125000000913 palmityl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- SYWDPPFYAMFYQQ-KTKRTIGZSA-N (z)-docos-13-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCCN SYWDPPFYAMFYQQ-KTKRTIGZSA-N 0.000 description 1
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 description 1
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 1
- AZUYLZMQTIKGSC-UHFFFAOYSA-N 1-[6-[4-(5-chloro-6-methyl-1H-indazol-4-yl)-5-methyl-3-(1-methylindazol-5-yl)pyrazol-1-yl]-2-azaspiro[3.3]heptan-2-yl]prop-2-en-1-one Chemical compound ClC=1C(=C2C=NNC2=CC=1C)C=1C(=NN(C=1C)C1CC2(CN(C2)C(C=C)=O)C1)C=1C=C2C=NN(C2=CC=1)C AZUYLZMQTIKGSC-UHFFFAOYSA-N 0.000 description 1
- RPDKSWAHLLMPBC-UHFFFAOYSA-N 3-(2-butyloctoxy)propan-1-amine Chemical compound CCCCCCC(CCCC)COCCCN RPDKSWAHLLMPBC-UHFFFAOYSA-N 0.000 description 1
- FJXNBHACVNJABN-KTKRTIGZSA-N 3-[(z)-docos-13-enoxy]propan-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCCOCCCN FJXNBHACVNJABN-KTKRTIGZSA-N 0.000 description 1
- ZRJOUVOXPWNFOF-UHFFFAOYSA-N 3-dodecoxypropan-1-amine Chemical compound CCCCCCCCCCCCOCCCN ZRJOUVOXPWNFOF-UHFFFAOYSA-N 0.000 description 1
- HPIKNEFNXLGDDK-UHFFFAOYSA-N 3-hexadecoxypropan-1-amine Chemical compound CCCCCCCCCCCCCCCCOCCCN HPIKNEFNXLGDDK-UHFFFAOYSA-N 0.000 description 1
- XRPBIQLEQVRCQO-UHFFFAOYSA-N 3-octadec-1-enoxypropan-1-amine Chemical compound CCCCCCCCCCCCCCCCC=COCCCN XRPBIQLEQVRCQO-UHFFFAOYSA-N 0.000 description 1
- GWOUPOJUVSKJCH-UHFFFAOYSA-N 3-octadecoxypropan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCOCCCN GWOUPOJUVSKJCH-UHFFFAOYSA-N 0.000 description 1
- XIFDDGOEJJEZBQ-UHFFFAOYSA-N 3-tetradecoxypropan-1-amine Chemical compound CCCCCCCCCCCCCCOCCCN XIFDDGOEJJEZBQ-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 1
- 239000004382 Amylase Substances 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- 229920000945 Amylopectin Polymers 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- PLZVEHJLHYMBBY-UHFFFAOYSA-N Tetradecylamine Chemical compound CCCCCCCCCCCCCCN PLZVEHJLHYMBBY-UHFFFAOYSA-N 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 125000002511 behenyl group Chemical group [H]C([*])([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])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])[H] 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 125000005644 linolenyl group Chemical group 0.000 description 1
- 125000005645 linoleyl group Chemical group 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
-
- 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
- B03D1/008—Organic compounds containing oxygen
-
- 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
- B03D1/016—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- 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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
-
- 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
Definitions
- the present invention relates to a reverse froth flotation process for removal of silicates from iron ore having K 8 o ⁇ 110 ⁇ m using formulations comprising alkyl ether diamine and alkyl ether monoamine, alkylamine or alkyl diamine.
- the presence of silicates has a detrimental effect on the quality of the iron, and it is therefore essential that the silicate content of the iron mineral can be considerably reduced.
- a common process of removing silicates from iron ore is reversed froth flotation, where the silicates are enriched in the flotate and leave the system with the froth, and the iron ends up in the bottom fraction.
- the iron ore bottom fraction either contains a low level of SiO2 and has a low recovery of iron, or it contains a high level of Si ⁇ 2 and has a high recovery of iron.
- the presence of coarse silicates (particle size > 110 ⁇ m) in the system has a negative effect on the iron recovery.
- Various solutions have been proposed in the prior art to increase iron recovery and reduce SiO2 levels. Very often these solutions have involved grinding the ores to fine particles.
- the particle size to which an ore must be size-reduced in order to liberate the mineral values from associated gangue or non-values is called the liberation size, and this will vary from ore to ore.
- the ore should not be ground further when the liberation size of the ore has been reached, since this will unnecessarily consume more energy and produce comparatively larger fractions of the very fine particles which are detrimental to the flotation process.
- K 8 O value is generally used.
- the factor K 8 o is defined as the sieve opening through which 80% by weight of the material of the mineral sample passes. If an ore has a K 8 o value of 110 ⁇ m, this means that 80% by weight of the material in the mineral sample will pass through a 110 ⁇ m sieve, and thus 20% by weight of the material of the sample will consist of particles having a diameter that is larger than 110 ⁇ m.
- US 6,076,682 discloses a process for enriching iron mineral from a silicate- containing iron ore by carrying out a reverse froth flotation in the presence of a silicate collecting agent containing a combination of at least one primary ether monoamine and at least one primary ether polyamine, where each of the ether amines contains an aliphatic hydrocarbyl group having 6-22 carbon atoms and the weight ratio of ether monoamine to ether polyamine is 1 :4-4:1 , and a depressing agent for the iron mineral.
- the working examples were performed with an iron ore having a K 80 of about 75 ⁇ m.
- SE 421 177 discloses a way to enrich oxidic minerals, especially iron minerals, by separation of silicate-containing gangues by foam flotation using a collector that is a combination of C8-C24 alkyl, preferably C10-C16 alkyl, fatty amines (mono-, di- or polyamines) and C8-C24 alkyl, preferably C8-C14-alkyl, ether diamines.
- the weight ratio of ether diamine to fatty amine is defined to be larger than 1.1 :1.
- the K 8 o for the iron ore used in the working examples of this patent publication is 85 ⁇ m.
- CA-A1 -2 205 886 relates to compositions of matter comprising a blend of (a) an amine component, which is one or more compounds selected from the group consisting of alkyl amines, alkyl diamines, alkyl polyamines, ether amines and ether polyamines and mixtures thereof; and (b) a C3-C24 carboxylic acid or mixtures thereof; for use e.g. in the froth flotation of silica from iron ore.
- This patent publication is silent about the K 8 o-value of the mineral samples flotated.
- silicate-containing iron ores having K 8 o ⁇ 110 ⁇ m, preferably > 115 ⁇ m and most preferably > 120 ⁇ m, by reverse flotation of the ore using a specific collecting composition
- a specific collecting composition comprising a) one or more C12-C15 alkyl ether diamines b) one or more C12-C24, preferably C12-C18, and most preferably C13-C18, alkyl ether monoamines, one or more C12-C24, preferably C12-C18, alkyl monoamines, one or more C16-C24, preferably C16-C18, alkyl ether diamines or one or more C16-C24, preferably C16-C18, alkyl diamines, or mixtures thereof c) and optionally a depressing agent for the iron mineral, wherein the weight ratio between a) and b) is 1 :5 to 5:1 , preferably
- the K 8 o of the ore to be processed in accordance with the invention is at most 200 ⁇ m, more preferably at most 180 ⁇ m, even more preferably at most 160 ⁇ m, and most preferably at most 150 ⁇ m.
- the first component a) is described by the general formula R 1 O-A-NH(CH 2 ) n NH 2 (I) wherein R 1 is a straight or branched hydrocarbyl group with 12-15 carbon atoms, A is a group -CH 2 CHXCH 2 -, wherein X is hydrogen or a hydroxyl group, preferably hydrogen, and n is a number 2-6, preferably 2-3, and most preferably 3; the second component b) of the formulation is selected from the group of compounds described by the formulae
- the first component a) of the formulation is of the formula R 1 OC 3 H 6 NHC 3 H 6 NH 2 (Ia) wherein R 1 is a straight or branched, preferably branched, hydrocarbyl group with 12-15 carbon atoms, and the second component b) of the formulation is selected from the group of compounds described by the formulae R 2 NH 2 (Ma),
- component b) has formula Ma or Ilia.
- weight ratio between a) and b) is 1 :5 to 5:1 , preferably 1 :4 to 4:1 , and most preferably 1 :4 to 3:1.
- the weight ratio between a) and b) is ⁇ 1 :1 , preferably in the range 1 :4 to 1 :1 , but for the other embodiments the wider range is more applicable.
- alkyl monoamines according to formula (Ma) could be advantageous for economic reasons, since alkyl monoamines generally are cheaper than alkyl diamines and alkyl ether mono- and diamines.
- the compositions containing (Ma) also are easy to formulate, and the collecting compositions are very effective.
- compositions where component b) is an alkyl diamine according to formula (Ilia) are also effective, but in this case compounds having saturated alkyl chains have a greater risk of precipitating, and thus compounds having unsaturated alkyl chains are more suitable.
- compositions where b) is an alkyl ether monoamine according to formula (Mb) or an alkyl ether diamine of formula (MIb) can suitably be used at low temperatures, compounds having branched alkyl chains in particular will confer desirable physical properties on the compounds, such as lower pour points.
- Suitable examples of groups R 1 are dodecyl, 2-butyloctyl, methyl-branched C13-alkyl (isothdecyl), tetradecyl, and methyl-branched C15-alkyl. Compounds having a branched alkyl group are especially preferred.
- Suitable examples of groups R 2 are dodecyl, 2-butyloctyl, methyl-branched C13-alkyl (isotridecyl), tetradecyl, C14-C15-alkyl, methyl-branched C15-alkyl, hexadecyl, C16-C17-alkyl, octadecyl, tallow alkyl, rapeseed alkyl, soya alkyl, oleyl, and erucyl.
- Suitable examples of groups R 3 are hexadecyl, octadecyl, C16-C17-alkyl, tallow alkyl, rapeseed alkyl, soya alkyl, oleyl, linoleyl, linolenyl, erucyl, and behenyl.
- Compounds having branched alkyl groups are especially preferred, and among the compounds derived from natural sources those having unsaturated alkyl chains are especially preferred, because they are easier to formulate.
- alkyl ether diamines to be used in the collecting compositions as component a) are N-[3-(dodecoxy)propyl]-1 ,3-propane diamine, N-[3-(2-butyloctoxy)propyl]-1 ,3-propane diamine, N-[3-(tridecoxy)- propyl]-1 ,3-propane diamine, N-[3-(tetradecoxy)propyl]-1 ,3-propane diamine, and N-[3-(C15-alkoxy)propyl]-1 ,3-propane diamine.
- alkyl ether amines examples include 3- (dodecoxy)propylamine, 3-[(coco alkyl)oxy]propylamine, 3-(2-butyloctoxy)- propylamine, 3-(isothdecoxy)propylamine, 3-(tetradecoxy)propylamine, 3-(C14- C15-alkoxy)propylamine, 3-(hexadecoxy)propylamine, 3-(octadecoxy)propyl- amine, 3-[(rapeseed alkyl)oxy]propylamine, 3-[(soya alkyl)oxy]propylamine, 3- (octadecenoxy)propylamine, 3-[(tallow alkyl)oxy]propylamine, and 3-(erucoxy)- propylamine.
- alkyl monoamines examples include n- dodecyl amine, (coco alkyl)amine, n-tetradecyl amine, n-hexadecyl amine, n- octadecyl amine, oleyl amine, (tallow alkyl)amine, (rapeseed alkyl)amine, (soya alkyl)amine, and erucyl amine.
- alkyl diamines examples include N- hexadecyl-thmethylene diamine, N-octadecyl-thmethylene diamine, N-oleyl- trimethylene diamine, N-(rapeseed alkyl)-thmethylene diamine, N-(soya alkyl)- trimethylene diamine, N-(tallow alkyl)-thmethylene diamine, N-linoleyl- trimethylene diamine, N-linolenyl-thmethylene diamine, N-erucyl-trimethylene diamine, and N-behenyl-thmethylene diamine.
- Unprotonated amines with the formulae described above are difficult to disperse in mineral/water systems without the aid of heating or vigorous stirring. Even with heating and stirring, the dispersions are not stable.
- a common practice for improving the dispersibility of amines is to prepare the corresponding ammonium salts by adding acid to the amine, forming at least 20% by mole ammonium salt, preferably before the amine compounds are diluted with water.
- suitable acids are lower organic acids, such as formic acid, acetic acid, and propionic acid; and inorganic acids, such as hydrochloric acid. Complete formation of ammonium salt is not needed to form a stable dispersion.
- the amine compounds are therefore suitably present partly as ammonium salts.
- 20-70, preferably 25- 50% of the amine groups are transferred to ammonium groups, which may be achieved by adding c. 10% by weight acetic acid to the amine compounds of the invention.
- the flotation is performed in the conventional pH-range of 8-11 in order to obtain the right surface charge of the minerals.
- a conventional depressing agent such as a hydrophilic polysaccharide, e.g. different kinds of starches, may be used in a conventional quantity sufficient to cover the iron ore surface in the amount needed.
- the depressing agent is normally added in an amount of 10 to 1 ,000 g per tonne of ore.
- froth regulators such as methylisobutyl carbinol and alcohols having a C6-C12 alkyl chain, such as 2- ethylhexanol, and alcohols alkoxylated with ethylene oxide and/or propylene oxide, e.g. propoxylated methanol and other ethoxylated/propoxylated short- chain alcohols, are conventionally used
- a froth regulator to the flotation systems comprising our claimed collectors will surprisingly result in a better iron recovery. This is in contrast with prior art flotation compositions containing compounds having shorter chain lengths. For such systems we found that frothers typically have an adverse effect.
- Further conventional additives may be added to the flotation system, such as pH-regulating agents, co-collectors, and extender oils.
- the principal ores of iron which are suitable for treatment according to the invention are hematite and magnetite ores.
- collector + frother (0.9 g amino compounds (a+b) neutralized with 10% by weight of acetic acid + 0.1 g frother) was diluted with 99 g of distilled water. The solution was stirred for at least 30 min before use.
- the actual dosages are described in each of the examples. The dosages are chosen according to recommendations for the specific ore samples used.
- the alkaline pulp with the added components was conditioned for 1 min before the air and the automatic froth scrapers were turned on.
- the flotation was performed at 20-25 0 C using an air flow of 3 l/min and a scraping frequency of 15 scrapes/min.
- the pulp level was kept constant by the addition of water below the pulp surface. The flotation was continued until complete exhaustion of mineralized froth was achieved.
- the flotation was performed in a sequence with three additions of collector and optional frother followed by a flotation step after each addition, so called stepwise rougher flotation.
- Each froth product was dried, weighed, and analyzed with respect to Si ⁇ 2 content.
- the bottom concentrate was withdrawn, dried, and analyzed with respect to SiO2 content and Fe 2 Os content.
- the mass balance and SiO2 grades were used to calculate the iron recovery and Si ⁇ 2 grade in each flotation step, and these results were then plotted in a grade-recovery graph. From this graph the iron recovery was determined by interpolation at a given SiO2 grade for this specific flotation experiment. In the Tables below, this SiO 2 grade is set at 2.0%.
- BS 1796 generally describes a sieve analysis using a shaking machine, the latter being adapted in accordance with DIN 66165.
- formulations containing an ether diamine and an ether monoamine are used for flotating the ore exhibiting the sieve analysis of Table 1. All formulations contain 10% by weight of 2-ethylhexanol as a frother.
- the used dosage levels are 50, 30, and 30 g/t of ore (corresponding to 34.7, 20.8, and 20.8 mg of components a+b and 3.9, 2.3, and 2.3 mg of frother added to the flotation cell, respectively).
- Flotations Nos. 120, 52, and 54 show that a better effect is obtained when the ether monoamine component has a hydrophobic group containing 12 or more carbon atoms.
- formulations containing an ether diamine and an alkyl monoamine or alkyl diamine are used for flotating the ore exhibiting the sieve analysis of Table 1. All formulations contain 10% by weight of 2-ethylhexanol as a frother.
- the used dosage levels are 50, 30, and 30 g/t of ore (corresponding to 34.7, 20.8, and 20.8 mg of components a+b and 3.85, 2.3, and 2.3 mg of frother added to the flotation cell, respectively).
- Flotations Nos. 29, 55, 76, and 75 show that a synergistic effect is achieved by using a combination of an alkyl ether diamine and an alkyl diamine in the collecting composition, as compared to using the single compounds.
- Flotations Nos. 29, 121 , 122, and 126 show that the use of collecting compositions containing an alkyl ether diamine and an alkyl diamine where a higher amount of the alkyl diamine is present is beneficial, but that the use of the alkyl diamine alone is detrimental.
- Flotations Nos. 29, 87, 114, and 113 show that the use of collecting compositions containing an alkyl ether diamine and an alkylamine where a higher amount of the alkylamine is present is beneficial, but that the use of the alkylamine alone is detrimental.
- Flotations Nos. 123, 124, 125, and 50 show that when using a collecting composition containing an ether diamine and an alkyl diamine where the alkyl diamine has a coco alkyl hydrophobic group (which is about C12C14) or lower, the iron recovery is not very good, whereas for a collecting composition containing an alkyl ether diamine and an alkyl monoamine, a coco alkyl hydrophobic group is sufficient to obtain a good iron recovery.
- Example 2 A comparison test was performed using an ore sample where the ore having the sieve analysis displayed in Table 1 had been further sieved to remove the coarser particles.
- the sieve analysis of this sample is displayed in Table 6.
- the ore sample displayed in Table 6 contains 72.1 % Fe 2 Os and 26.5% by weight of SiO 2 .
- Table 6
- the used dosage levels are 50, 30, and 30 g/t of ore (corresponding to 34.7, 20.8, and 20.8 mg of components a+b and 3.9, 2.3, and 2.3 mg of frother added to the flotation cell) for the ore sample described in Table 6.
- the ore of Table 1 was used.
- the used dosage levels when 10% frother (2- ethylhexanol) is used are 50, 30, and 30 g/t of ore (corresponding to 34.7, 20.8, and 20.8 mg of components a+b and 3.85, 2.3, and 2.3 mg of frother added to the flotation cell, respectively).
- the used dosage levels when no frother is added are 50, 30, and 30 g/t (corresponding to 38.6, 23.1 , and 23.1 mg of components a+b added to the flotation cell).
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AU2007338062A AU2007338062B2 (en) | 2006-12-22 | 2007-12-19 | Amine formulations for reverse froth flotation of silicates from iron ore |
BRPI0720603-8A2A BRPI0720603A2 (en) | 2006-12-22 | 2007-12-19 | AMINE FORMULATIONS FOR REVERSE FLOTATION WITH SILICATE FOAM FROM IRON ORE |
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US60/920,653 | 2007-03-29 |
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CN102125891A (en) * | 2010-12-07 | 2011-07-20 | 鞍钢集团矿业公司 | Method for making magnet-red iron mixed ore anionic reverse flotation catching agent |
WO2012089651A1 (en) * | 2010-12-28 | 2012-07-05 | Akzo Nobel Chemicals International B.V. | Amine-containing formulations for reverse froth flotation of silicates from iron ore |
WO2012139939A1 (en) | 2011-04-13 | 2012-10-18 | Basf Se | Diamine compounds and their use for inverse froth flotation of silicate from iron ore |
WO2012139986A2 (en) | 2011-04-13 | 2012-10-18 | Basf Se | Amine and diamine compounds and their use for inverse froth flotation of silicate from iron ore |
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