CA1095640A - Process for the concentration of sulfidic nickel ores - Google Patents
Process for the concentration of sulfidic nickel oresInfo
- Publication number
- CA1095640A CA1095640A CA302,536A CA302536A CA1095640A CA 1095640 A CA1095640 A CA 1095640A CA 302536 A CA302536 A CA 302536A CA 1095640 A CA1095640 A CA 1095640A
- Authority
- CA
- Canada
- Prior art keywords
- groups
- process according
- flotation
- dithiophosphate
- ore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 19
- 238000005188 flotation Methods 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000001143 conditioned effect Effects 0.000 claims 3
- 238000009291 froth flotation Methods 0.000 abstract description 7
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 description 9
- -1 alkyl xanthate Chemical compound 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 2
- 229910052951 chalcopyrite Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- CRCCWKNJNKPDAE-UHFFFAOYSA-N hydroxy-(2-methylpropoxy)-(2-methylpropylsulfanyl)-sulfanylidene-$l^{5}-phosphane Chemical compound CC(C)COP(O)(=S)SCC(C)C CRCCWKNJNKPDAE-UHFFFAOYSA-N 0.000 description 2
- QWENMOXLTHDKDL-UHFFFAOYSA-N pentoxymethanedithioic acid Chemical compound CCCCCOC(S)=S QWENMOXLTHDKDL-UHFFFAOYSA-N 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 2
- 239000012991 xanthate Substances 0.000 description 2
- ONJROLGQWMBXAP-UHFFFAOYSA-N 2-methyl-1-(2-methylpropyldisulfanyl)propane Chemical compound CC(C)CSSCC(C)C ONJROLGQWMBXAP-UHFFFAOYSA-N 0.000 description 1
- 235000003625 Acrocomia mexicana Nutrition 0.000 description 1
- 244000202285 Acrocomia mexicana Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Chemical group CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- DQSGVVGOPRWTKI-QVFAWCHISA-N atazanavir sulfate Chemical compound [H+].[H+].[O-]S([O-])(=O)=O.C([C@H](NC(=O)[C@@H](NC(=O)OC)C(C)(C)C)[C@@H](O)CN(CC=1C=CC(=CC=1)C=1N=CC=CC=1)NC(=O)[C@@H](NC(=O)OC)C(C)(C)C)C1=CC=CC=C1 DQSGVVGOPRWTKI-QVFAWCHISA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002704 decyl 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])* 0.000 description 1
- 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 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- YGHCWPXPAHSSNA-UHFFFAOYSA-N nickel subsulfide Chemical compound [Ni].[Ni]=S.[Ni]=S YGHCWPXPAHSSNA-UHFFFAOYSA-N 0.000 description 1
- 125000001400 nonyl 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])[H] 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 229910052954 pentlandite Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920006395 saturated elastomer Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 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
- B03D1/014—Organic compounds containing phosphorus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
ABSTRACT
A process for the concentration of sulfidic nickel ores from basic rocks by means of froth flotation is described.
The flotation reagent used is dithiophosphate with a pH of 3.5-6Ø
A process for the concentration of sulfidic nickel ores from basic rocks by means of froth flotation is described.
The flotation reagent used is dithiophosphate with a pH of 3.5-6Ø
Description
109564(~
The present invention relates to a process for the concentration of sulfidic nickel ores from basic rocks by means of froth flotation. The flotation reagent used is dithiophosphate with a pH of 3.5-6Ø
Sulfidic nickel ores in which valuable metals are present in the form of various sulfides, e.g.
pentlandite (NiFeS2) and heazlewoodite (~i3S2) have long been concentrated by froth flotation; primarily sulfur-bearing collector agents such as alkyl xanthates and dialkyl dithiophosphateshave been found to be suitable for this purpose. The flotation process is usually carried out within a pH range of 6-8.
Nevertheless, there are certain ultrabasic ore types, peridotites, which contain nickel minerals. In the case of these ores it has been observed that a better nickel yield is obtained in froth flotation if a finely-ground ore is first treated with a relatively large quantity of sulfuric acid and thereafter the flotation is carried out within a pH range of 3.5-6, using alkyl xanthate as the collector agent. The ~`:
:;
~ .
bm:
~ improved yield is most probably explained by the fact that ! these ores are partly oxidized and that by means of the acid ; treatment nickel sulfide surfaces are freed with the result ~
I that the collector agent can reach them. In spite of this ~`
I improved technology, it has proven difficult to obtain on one l hand the desired nickel content in the concentrate, i.e. over ¦ 6% nickel, and on the other hand a high total yield of nicke], ¦ i.e. a yield of over 70%.
i It has now been found possible to improve considerably both ¦ the purity and the total yield in the nickel ore flotation of ¦ the type described above, by selecting dithiophosphat as the ~ collector agent and by adding it to the pulp in question at ¦ the latest immediately after the addition of sulfuric acid.
¦ The duration of the conditioning of the pulp is usu211y 15 ~ minutes, but pre~erably 20-60 minutes, whereafter the sulfidic ¦ nickel mineral is flotated at pH 3.5-6.0 in a manner known ~''3' se. , I;
.
When using the process according to the invention it is crucial I . , . ., ,.. ; ~ ,.. .. . ,.... , .. . ......... ., .. ., - ....... .. , ... - .. ~ ~
that dithiophosphate is not added substantially later than the sulfuric acid. When sulfuric acid is added, the pH lowers momentarily to approx. 1-2, whereafter it, after approx. 3-10 minutes, rises to approx. 3.5-6 under the effect of that basic mineral at the pH of which the flotation is carried out.
"Substantial" here means that the time period must not sur:pass ~ minutes, suitably 2 minutes, preferably 1 minute. ~hen using the process according to the invention the reagent is thus present for the period during which the pH of the pulp surpasses the pH prevailing during the actual froth flotation. According to one advantageous embodiment, the collector agent and the ~ulfuric acid are added simultaneously. When so desired, the dithiophosphate can also be added before the sulfuric acid.
The reason why the time of the dithiophosphate addition is 50 .
important has not yet been explained, ~ut according to one theory certain nickel surfaces are momentarily fxeed at the low p~ which prevails at the time of the sulfuric acid addition and immediately thereafter. l i . . .
' ' .
.. . . .
r 3 lO g 56 ~
The dithiophosphate compounds according to the inven~ion are compounds Wit]l the general formuia RIO ~ ,~ S o R O SH
where RI and RII, ndependently of each other, represent a hydrocarbon group having 2-22 carbon atoms, preferably 2-12 carbon atoms, or a salt of the same. Such hydrocarbon groups can be aliphatic groups, phenyl-bearillg groups, or cycloaliphatic groups. Some special examples of the suitable groups are alkyl groups such as ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, hexyl, 2-ethyl-hexyl, octyl, nonyl, decyl, and dodecyl; phenyl-bearing groups such as phenyl, metnyl-phenyl, and dimethyl-phenyl; saturated cycloaliphatic groups such as cyclohexyl and cyclohexyl-eth~l. The addition of dithio-phosphate is 25-750 grams, preferably 50-400 grams, oer one ;' tonne of the ore on which the froth flotation is performed. ~ !
When using the process according to the invention it is also possible, if so desired, to add conventional additives during the flotation, such as secondary collector agents. Some examples of suitable secondary collector agents are water insoluble hydrophobic substances which are emulsified in water by means of a suitable emulsifier. Other additives include compressing and activating agents, frothers, etc.
e process according to the invention is also illustrated by the following examples.
Example I
A peridotite ore containing 0.50% nickel in the form of a nickel sulfide mineral and~ furthermore, copper in the form of chalcopyrite, CuFeS2, magnesium sil~cates c~rresponding to 35% ~gO, and a totai sulfide amount correspond-ing to 2~ S, I
wa~ crushed into nuggets of 2-4 cm. Thereafter Lhese nuggets l were ground in a grinder for 10 minutes in the presence of ¦
... - . ~
', . , . .. , :
' : ` ' ' ~ 4 109S64~
¦ 0.8 1 water per one kg of ore. After grinding, 80% by weight ¦ passed a sieve with a mesh of 65 ~m. A mineral pulp -v7,~s :~
I prepared from the ore thus ground (1 ~ilogram of ore and 1 liter ¦ of water), and this pulp was transferred into a flotation cell.
f Sulfuric acid, a flotation reagent, and a frother were added I according to the tables below. A~er the crude flotation the operation was repeated 3 times.
~ Experiment 1 , r _ i Time - min , 1, ¦ 0 Sulfuric acid 20 kg/tonne 15 Potassium amyl xanthogenate 500 g/tonne pH 4.0 20 Start of crude flotation pH 4.5 37 Potassium amyl xanthogenate 250 g/tonne pH 4.4 j 41 " 250 g/tonne pH 4.5 46 ~ 250 g/tonne pH 4.6 1 ~ 52 " 250 g/tonne pH 4.6 ~
1 59 ~ 250 g/tonne p~ 4.6 66 " 500 g/tonne p~ 4.6 73 Start of 1st repeat pH 4.7 ; ~ 90 Start of 2nd repeat ~ . , pH 4.9~ ~105 Start of 3rd repeat pH 5.1 ~;
A frothing agent, dipropylene-glycol-monomethyl-ether, was added at a total rate of 375 grams/tonne between 37 and 66 minutes.
Exper _ ent 2 ~ :f~ Tim - min 0 Sulfuric acid 30 kg/tonne ~1 20 Di-isobutyl dithiophosphate 150 g/tonne pH 4.0 25 Start of crude flotation pH 4.2 62 Di -iso~butyl ~ithiophosphate 100 g/tonne pH 4.6 ~
65-80 1st repeat pH 5.1-4.7 ~¦
80-93 2nd repeat pH 4.9 93-104 3rd repeat pH 5.1 1 : ~
'.
I, . 1.
-- ' .
`~
10~56 ~ t l i Exper ment 3 _ _- . s ~ne - min ` "
_ ~.
0 Sulfuric acid 33 kg/tonne , Di-isobutyl dithiophosphate 150 g/tonne 2 l pH 1.7 ,~'
The present invention relates to a process for the concentration of sulfidic nickel ores from basic rocks by means of froth flotation. The flotation reagent used is dithiophosphate with a pH of 3.5-6Ø
Sulfidic nickel ores in which valuable metals are present in the form of various sulfides, e.g.
pentlandite (NiFeS2) and heazlewoodite (~i3S2) have long been concentrated by froth flotation; primarily sulfur-bearing collector agents such as alkyl xanthates and dialkyl dithiophosphateshave been found to be suitable for this purpose. The flotation process is usually carried out within a pH range of 6-8.
Nevertheless, there are certain ultrabasic ore types, peridotites, which contain nickel minerals. In the case of these ores it has been observed that a better nickel yield is obtained in froth flotation if a finely-ground ore is first treated with a relatively large quantity of sulfuric acid and thereafter the flotation is carried out within a pH range of 3.5-6, using alkyl xanthate as the collector agent. The ~`:
:;
~ .
bm:
~ improved yield is most probably explained by the fact that ! these ores are partly oxidized and that by means of the acid ; treatment nickel sulfide surfaces are freed with the result ~
I that the collector agent can reach them. In spite of this ~`
I improved technology, it has proven difficult to obtain on one l hand the desired nickel content in the concentrate, i.e. over ¦ 6% nickel, and on the other hand a high total yield of nicke], ¦ i.e. a yield of over 70%.
i It has now been found possible to improve considerably both ¦ the purity and the total yield in the nickel ore flotation of ¦ the type described above, by selecting dithiophosphat as the ~ collector agent and by adding it to the pulp in question at ¦ the latest immediately after the addition of sulfuric acid.
¦ The duration of the conditioning of the pulp is usu211y 15 ~ minutes, but pre~erably 20-60 minutes, whereafter the sulfidic ¦ nickel mineral is flotated at pH 3.5-6.0 in a manner known ~''3' se. , I;
.
When using the process according to the invention it is crucial I . , . ., ,.. ; ~ ,.. .. . ,.... , .. . ......... ., .. ., - ....... .. , ... - .. ~ ~
that dithiophosphate is not added substantially later than the sulfuric acid. When sulfuric acid is added, the pH lowers momentarily to approx. 1-2, whereafter it, after approx. 3-10 minutes, rises to approx. 3.5-6 under the effect of that basic mineral at the pH of which the flotation is carried out.
"Substantial" here means that the time period must not sur:pass ~ minutes, suitably 2 minutes, preferably 1 minute. ~hen using the process according to the invention the reagent is thus present for the period during which the pH of the pulp surpasses the pH prevailing during the actual froth flotation. According to one advantageous embodiment, the collector agent and the ~ulfuric acid are added simultaneously. When so desired, the dithiophosphate can also be added before the sulfuric acid.
The reason why the time of the dithiophosphate addition is 50 .
important has not yet been explained, ~ut according to one theory certain nickel surfaces are momentarily fxeed at the low p~ which prevails at the time of the sulfuric acid addition and immediately thereafter. l i . . .
' ' .
.. . . .
r 3 lO g 56 ~
The dithiophosphate compounds according to the inven~ion are compounds Wit]l the general formuia RIO ~ ,~ S o R O SH
where RI and RII, ndependently of each other, represent a hydrocarbon group having 2-22 carbon atoms, preferably 2-12 carbon atoms, or a salt of the same. Such hydrocarbon groups can be aliphatic groups, phenyl-bearillg groups, or cycloaliphatic groups. Some special examples of the suitable groups are alkyl groups such as ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, hexyl, 2-ethyl-hexyl, octyl, nonyl, decyl, and dodecyl; phenyl-bearing groups such as phenyl, metnyl-phenyl, and dimethyl-phenyl; saturated cycloaliphatic groups such as cyclohexyl and cyclohexyl-eth~l. The addition of dithio-phosphate is 25-750 grams, preferably 50-400 grams, oer one ;' tonne of the ore on which the froth flotation is performed. ~ !
When using the process according to the invention it is also possible, if so desired, to add conventional additives during the flotation, such as secondary collector agents. Some examples of suitable secondary collector agents are water insoluble hydrophobic substances which are emulsified in water by means of a suitable emulsifier. Other additives include compressing and activating agents, frothers, etc.
e process according to the invention is also illustrated by the following examples.
Example I
A peridotite ore containing 0.50% nickel in the form of a nickel sulfide mineral and~ furthermore, copper in the form of chalcopyrite, CuFeS2, magnesium sil~cates c~rresponding to 35% ~gO, and a totai sulfide amount correspond-ing to 2~ S, I
wa~ crushed into nuggets of 2-4 cm. Thereafter Lhese nuggets l were ground in a grinder for 10 minutes in the presence of ¦
... - . ~
', . , . .. , :
' : ` ' ' ~ 4 109S64~
¦ 0.8 1 water per one kg of ore. After grinding, 80% by weight ¦ passed a sieve with a mesh of 65 ~m. A mineral pulp -v7,~s :~
I prepared from the ore thus ground (1 ~ilogram of ore and 1 liter ¦ of water), and this pulp was transferred into a flotation cell.
f Sulfuric acid, a flotation reagent, and a frother were added I according to the tables below. A~er the crude flotation the operation was repeated 3 times.
~ Experiment 1 , r _ i Time - min , 1, ¦ 0 Sulfuric acid 20 kg/tonne 15 Potassium amyl xanthogenate 500 g/tonne pH 4.0 20 Start of crude flotation pH 4.5 37 Potassium amyl xanthogenate 250 g/tonne pH 4.4 j 41 " 250 g/tonne pH 4.5 46 ~ 250 g/tonne pH 4.6 1 ~ 52 " 250 g/tonne pH 4.6 ~
1 59 ~ 250 g/tonne p~ 4.6 66 " 500 g/tonne p~ 4.6 73 Start of 1st repeat pH 4.7 ; ~ 90 Start of 2nd repeat ~ . , pH 4.9~ ~105 Start of 3rd repeat pH 5.1 ~;
A frothing agent, dipropylene-glycol-monomethyl-ether, was added at a total rate of 375 grams/tonne between 37 and 66 minutes.
Exper _ ent 2 ~ :f~ Tim - min 0 Sulfuric acid 30 kg/tonne ~1 20 Di-isobutyl dithiophosphate 150 g/tonne pH 4.0 25 Start of crude flotation pH 4.2 62 Di -iso~butyl ~ithiophosphate 100 g/tonne pH 4.6 ~
65-80 1st repeat pH 5.1-4.7 ~¦
80-93 2nd repeat pH 4.9 93-104 3rd repeat pH 5.1 1 : ~
'.
I, . 1.
-- ' .
`~
10~56 ~ t l i Exper ment 3 _ _- . s ~ne - min ` "
_ ~.
0 Sulfuric acid 33 kg/tonne , Di-isobutyl dithiophosphate 150 g/tonne 2 l pH 1.7 ,~'
2 pH 2.1 j~,, 2 pH 3.6 30 Start of crude flotation pH 4.2 ~, 39-79 Dipropylene-glycol-monomethyl-ether ¦Frother 120 g/tonne. Continuous crude flotation '',' -79-96 1st repeat pH 4.8 ~, 96-103 ~nd repeat pH 5.0 ,, 103-lll 3rd repeat pH 5.1 ~`
: .-. Y ~ i The settling products of the various flotation stages and the ~ ' froth of the last stage were dried, we,ighed and analysed for nickel. T'he following results were thereby obtained. 2':
~ . ~
, Crude flotation 1st repeat 2nd reFeat 3rd repeat Concen- Yield Concen- Yield Concen- Yield Col~cen- Yield ,,,, ,,,,~,', ,,tration tration tration tration Experiment l 1.5476.2 3.83 50.1 5.43 45.8 6.67 43.2 ..
. . j,~ ! .
,~ Experiment 2 0.87 73.2 1.90 36.9 4.1 32.9 7.1 30~0 ~, EX~erim~nt 3 2.1 76.8 5.1 71.6 6.48 69.7 7.2 68.5 : ~: 22~ ' Experiment 1 represents the model of the current commercially used froth flotation technology in the respect that the addition , -~ ~ o~ the collector agent is continuous and the conditioning pe.riod after the first addition of the collector agent is only l 5 minutes. Even though the total addition of potassium amyl ~-~
,; ~ xanthogenate is 2250 g/tonne, the nickel yield is poor, only ~ 43~ af ter the third repeat operation. ~r I
,, ~ Experiment 2 the collector agent was di-isobutyl dithio-'~ phosphate, which was added at two staqes, The first addition ~' was 20 minutes after the sulfuric acid addition and the second ~
one 5 minutes later. The flotation result was good in terms of ~ ' r ickel concentration, but poor in ter!r.s of the yield.
~ 6 lOgS~
. ~
In Experiment 3, which was performed according to the invention, the collector agent and the sulfuric acid were added simultaneously. The conditioning period was 30 minutes. The values obtained for the nickel concentration and the yield, 7.2~ and 68.5%, respectively, are both highly satisfactory.
When these are compared with the values obtained in Experiments 1 and 2, it must be taken into consideration that the amount of reagent in Experiment 3 was less than 7~. Thus it was 60~ of the amount used in the reference experiments.
~he process according to the invention thus represents a considerably improved technique in this field.
"
. .
I
. .' ' . I
' ' ~
.
.. ~ ' ' .
.:
.
: .-. Y ~ i The settling products of the various flotation stages and the ~ ' froth of the last stage were dried, we,ighed and analysed for nickel. T'he following results were thereby obtained. 2':
~ . ~
, Crude flotation 1st repeat 2nd reFeat 3rd repeat Concen- Yield Concen- Yield Concen- Yield Col~cen- Yield ,,,, ,,,,~,', ,,tration tration tration tration Experiment l 1.5476.2 3.83 50.1 5.43 45.8 6.67 43.2 ..
. . j,~ ! .
,~ Experiment 2 0.87 73.2 1.90 36.9 4.1 32.9 7.1 30~0 ~, EX~erim~nt 3 2.1 76.8 5.1 71.6 6.48 69.7 7.2 68.5 : ~: 22~ ' Experiment 1 represents the model of the current commercially used froth flotation technology in the respect that the addition , -~ ~ o~ the collector agent is continuous and the conditioning pe.riod after the first addition of the collector agent is only l 5 minutes. Even though the total addition of potassium amyl ~-~
,; ~ xanthogenate is 2250 g/tonne, the nickel yield is poor, only ~ 43~ af ter the third repeat operation. ~r I
,, ~ Experiment 2 the collector agent was di-isobutyl dithio-'~ phosphate, which was added at two staqes, The first addition ~' was 20 minutes after the sulfuric acid addition and the second ~
one 5 minutes later. The flotation result was good in terms of ~ ' r ickel concentration, but poor in ter!r.s of the yield.
~ 6 lOgS~
. ~
In Experiment 3, which was performed according to the invention, the collector agent and the sulfuric acid were added simultaneously. The conditioning period was 30 minutes. The values obtained for the nickel concentration and the yield, 7.2~ and 68.5%, respectively, are both highly satisfactory.
When these are compared with the values obtained in Experiments 1 and 2, it must be taken into consideration that the amount of reagent in Experiment 3 was less than 7~. Thus it was 60~ of the amount used in the reference experiments.
~he process according to the invention thus represents a considerably improved technique in this field.
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' ' ~
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.. ~ ' ' .
.:
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Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for the concentration of sulfidic nickel ore from basic rocks by means of flotation, whereby the pulp obtained is treated with a strong acid so that the pH during the flotation is 3.5-6.0, characterized in that dithiophosphate with the following formula where RI and RII, independently of each other, represent hydro-carbon groups having 2-22 carbon atoms, or a salt of the same, is added as a collector agent at the latest immediately after the acid addition, and the sulfidic nickel mineral is flotated in a manner known per se.
2. A process according to claim 1, wherein said hydro-carbon groups have 2 to 12 carbon atoms.
3. A process according to claim 1, characterized in that, after the addition of the sulfuric acid and the dithiophosphate, the pulp is conditioned for a minimum of 15 minutes.
4. A process according to claim 3 wherein said pulp is conditioned for 20 to 60 minutes.
5. A process according to claim 1, characterized in that, independently of each other, RI and RII are alkyl groups, phenyl-bearing groups, or cycloaliphatic groups.
6. A process according to claim 1, characterized in that dithiophosphate is added in an amount which is 25-750 grams per ton of ore.
7. A process according to claim 3, characterized in that, independently of each other, RI and RII are alkyl groups, phenyl-bearing groups, or cycloaliphatic groups.
8. A process according to claim 5, characterized in that, independently of each other, RI and RII are alkyl groups, phenyl-bearing groups, or cycloaliphatic groups.
9. A process according to claim 1, 3 or 5, wherein the dithiophosphate is added in an amount of 50 to 400 grams per ton of ore.
10. A process for the concentration of sulfidic nickel ore from basic rocks by means of flotation, thereby the pulp obtained is treated with a strong acid so that the pH during the flotation is 3.5 to 6.0, characterized in that dithiophosphate of the formula or a salt thereof, wherein RI and RII are alkyl groups, phenyl-bearing groups or cycloaliphatic groups having from 2 to 12 carbon atoms, is added as a collector agent at the latest immediately after the acid addition in an amount of 50 to 400 grams per ton of ore, and the sulfidic nickel mineral is flotated in a manner known per se, said pulp being conditioned for 20 to 60 minutes after the addition of acid and the dithiophosphate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI771,409 | 1977-05-04 | ||
| FI771409A FI59538C (en) | 1977-05-04 | 1977-05-04 | SAETT ATT ANRIKA SULFIDISK NICKELMALM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1095640A true CA1095640A (en) | 1981-02-10 |
Family
ID=8510815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,536A Expired CA1095640A (en) | 1977-05-04 | 1978-05-03 | Process for the concentration of sulfidic nickel ores |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1095640A (en) |
| FI (1) | FI59538C (en) |
| FR (1) | FR2389414A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002244517B2 (en) * | 2001-03-30 | 2007-11-29 | Bhp Billiton Innovation Pty Ltd | Improved flotation |
| US7389881B2 (en) * | 2001-03-30 | 2008-06-24 | Bhp Billiton Pty Ltd | Flotation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4530758A (en) * | 1982-05-17 | 1985-07-23 | Thiotech, Inc. | Ore flotation method |
| FR2530161A1 (en) * | 1982-07-16 | 1984-01-20 | Inst Mondial Phosphate | IMPROVEMENTS IN PROCESSES FOR SEPARATING METALS FROM HYPERACID MEDIA BY ION FLOATING |
| US4584095A (en) * | 1984-06-20 | 1986-04-22 | Thiotech, Inc. | Ore flotation method employing phosphorodithio compounds as frother adjuvants |
| US4699712A (en) * | 1984-06-20 | 1987-10-13 | Thiotech, Inc. | Ore dressing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB310186A (en) * | 1928-04-26 | 1929-04-25 | American Cyanamid Co | Improvements in flotation agents |
-
1977
- 1977-05-04 FI FI771409A patent/FI59538C/en not_active IP Right Cessation
-
1978
- 1978-05-03 CA CA302,536A patent/CA1095640A/en not_active Expired
- 1978-05-03 FR FR7813238A patent/FR2389414A1/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002244517B2 (en) * | 2001-03-30 | 2007-11-29 | Bhp Billiton Innovation Pty Ltd | Improved flotation |
| US7389881B2 (en) * | 2001-03-30 | 2008-06-24 | Bhp Billiton Pty Ltd | Flotation |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2389414B1 (en) | 1980-04-04 |
| FI59538C (en) | 1981-09-10 |
| FI771409A (en) | 1978-11-05 |
| FR2389414A1 (en) | 1978-12-01 |
| FI59538B (en) | 1981-05-29 |
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