CN111744679A - Iron ore flotation method - Google Patents
Iron ore flotation method Download PDFInfo
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- CN111744679A CN111744679A CN202010662392.3A CN202010662392A CN111744679A CN 111744679 A CN111744679 A CN 111744679A CN 202010662392 A CN202010662392 A CN 202010662392A CN 111744679 A CN111744679 A CN 111744679A
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- CN
- China
- Prior art keywords
- iron ore
- flotation
- starch
- iron
- reverse flotation
- 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.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000005188 flotation Methods 0.000 title claims abstract description 71
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229920002472 Starch Polymers 0.000 claims abstract description 24
- 235000019698 starch Nutrition 0.000 claims abstract description 24
- 239000008107 starch Substances 0.000 claims abstract description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 229910052595 hematite Inorganic materials 0.000 claims abstract description 14
- 239000011019 hematite Substances 0.000 claims abstract description 14
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920001353 Dextrin Polymers 0.000 claims abstract description 10
- 239000004375 Dextrin Substances 0.000 claims abstract description 10
- 235000019425 dextrin Nutrition 0.000 claims abstract description 10
- 229910001608 iron mineral Inorganic materials 0.000 claims abstract description 9
- 230000003213 activating effect Effects 0.000 claims abstract description 7
- 150000001450 anions Chemical class 0.000 claims abstract description 7
- 229910052586 apatite Inorganic materials 0.000 claims abstract description 7
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 7
- 239000000194 fatty acid Substances 0.000 claims abstract description 7
- 229930195729 fatty acid Natural products 0.000 claims abstract description 7
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 7
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 7
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims abstract description 7
- 239000010453 quartz Substances 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- 125000002924 primary amino group Chemical class [H]N([H])* 0.000 claims abstract 2
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 claims description 8
- 150000002500 ions Chemical class 0.000 claims description 6
- 239000012452 mother liquor Substances 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910020489 SiO3 Inorganic materials 0.000 abstract description 3
- 150000001768 cations Chemical class 0.000 abstract 1
- 229940043264 dodecyl sulfate Drugs 0.000 description 6
- 150000003141 primary amines Chemical class 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- -1 ether amine Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009628 steelmaking Methods 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
- B03D1/018—Mixtures of inorganic and organic 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
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a flotation method for iron ore, belonging to the technical field of ore dressing. The iron ore flotation method of the invention comprises the following steps: A. anion reverse flotation (1) reverse flotation of quartz: CaCl below 100g/t2As an activating agent, adjusting the pH value to 11-12 by NaOH, inhibiting hematite by 300-500 g/t starch, and taking 500-700 g/t fatty acid as a collecting agent; (2) reverse flotation of apatite: 300g/t of carboxylic acid is used as a collector, 300g/t of starch and 200g/tNa2SiO3Inhibiting hematite, wherein the pH value is 9-11; B. cation reverse flotation: silica is floated with 0.3-0.5 kg/t primary amine and etheramine, iron minerals are inhibited with 0.5-0.7 kg/t starch and dextrin, and the pH is 10-10.5 or 8-9. The beneficiation process greatly improves the efficiency of iron ore flotation, and maximizes the iron resource value.
Description
Technical Field
The invention relates to a flotation method for iron ore, belonging to the technical field of ore dressing.
Background
Iron is the earliest metal found in the world, the most widely used metal and the most used metal, and the consumption of the iron accounts for about 95 percent of the total consumption of the metal. Iron ore is mainly used in the steel industry for smelting pig iron (carbon content is generally above 2%) and steel (carbon content is generally below 2%) with different carbon contents. Since the converter steelmaking method invented in the middle of the 19 th century gradually forms the industrial mass production of steel, steel is always the most important structural material, plays an extremely important role in national economy, is an important supporting industry for social development, and is the most important and most applied metal material in modern industry. The flotation of iron ore plays an especially important role.
Disclosure of Invention
The invention aims to solve the first technical problem of providing an iron ore flotation method with high iron recovery rate.
In order to solve the first technical problem of the present invention, the iron ore flotation method of the present invention comprises:
A. anion reverse flotation
(1) Reverse flotation of quartz: CaCl below 100g/t2As an activating agent, adjusting the pH value to 11-12 by NaOH, inhibiting hematite by 300-500 g/t starch, and taking 500-700 g/t fatty acid as a collecting agent;
(2) reverse flotation of apatite: 300g/t of carboxylic acid is used as a collector, 300g/t of starch and 200g/tNa2SiO3Inhibiting hematite with pH of 9-11
B. Reverse flotation of positive ions
Silica is floated with 0.3-0.5 kg/t primary amine and etheramine, iron minerals are inhibited with 0.5-0.7 kg/t starch and dextrin, and the pH is 10-10.5 or 8-9.
In a specific embodiment, the method further comprises rough grinding the iron ore to 100 mm.
In a specific embodiment, the process further comprises pre-desliming the mother liquor.
In one embodiment, the cationic reverse flotation further comprises at least one of altreol or lauryl sulfate.
In one embodiment, the alcohol or lauryl sulfate is added in an amount of 0.3 kg/t.
And step A/step B selects coarse iron minerals with the granularity of 250-300 mm as carriers.
Has the advantages that:
the ore dressing process flow of the invention adopts a specific flotation technology, greatly improves the efficiency of iron ore flotation, has high iron recovery rate and maximizes the iron resource value.
Detailed Description
In order to solve the first technical problem of the present invention, the iron ore flotation method of the present invention comprises:
A. anion reverse flotation
(1) Reverse flotation of quartz: CaCl below 100g/t2As an activating agent, adjusting the pH value to 11-12 by NaOH, inhibiting hematite by 300-500 g/t starch, and taking 500-700 g/t fatty acid as a collecting agent;
(2) reverse flotation of apatite: 300g/t of carboxylic acid is used as a collector, 300g/t of starch and 200g/tNa2SiO3Inhibiting hematite with pH of 9-11
B. Reverse flotation of positive ions
Silica is floated with 0.3-0.5 kg/t primary amine and etheramine, iron minerals are inhibited with 0.5-0.7 kg/t starch and dextrin, and the pH is 10-10.5 or 8-9.
In a specific embodiment, the method further comprises rough grinding the iron ore to 100 mm.
In a specific embodiment, the process further comprises pre-desliming the mother liquor.
In one embodiment, the cationic reverse flotation further comprises at least one of altreol or lauryl sulfate.
In one embodiment, the alcohol or lauryl sulfate is added in an amount of 0.3 kg/t.
And step A/step B selects coarse iron minerals with the granularity of 250-300 mm as carriers.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
Example 1
Crushing the Anshan iron ore produced in Liaoning east by using a jaw crusher, conveying the crushed iron ore to a storage bin by using a conveyor, feeding the iron ore in the storage bin into a ball mill by using an electromagnetic vibrating feeder, conveying the ball-milled iron ore to a classifier, and conveying the iron ore with the particle size of 10mm to a stirring barrel to be added with a flotation reagent for flotation. Returning the powder with the granularity of more than 10mm to the ball mill for continuous ball milling.
Iron ore flotation:
A. anion reverse flotation
(1) Reverse flotation of quartz: at 90g/t CaCl2As an activating agent, NaOH is used for adjusting the pH value to 11, 300g/t of starch is used for inhibiting hematite, and 500g/t of fatty acid is used as a collecting agent;
(2) reverse flotation of apatite: adding 300g/t of carboxylic acid as a collecting agent, 300g/t of starch and 200g/t of Na2SiO3Inhibition of hematite, pH 10;
B. reverse flotation of positive ions
And D, pre-desliming the mother liquor subjected to the flotation in the step A.
Silica was floated with 0.3kg/t primary amine and 0.5kg/t etheramine, iron minerals were suppressed with 0.5kg/t starch and 0.7kg/t dextrin starch and dextrin, 0.3kg/t lauryl sulfate, pH10 was added.
In the reverse flotation process, iron ore flotation is carried out under the normal temperature condition. The indexes of the flotation product obtained by a daily treatment 1.5t continuous expansion test are as follows: the grade of the iron ore concentrate is 56.58 percent, and the recovery rate is 70.29 percent.
Example 2
Crushing the Panzhihua iron ore by using a jaw crusher, conveying the Panzhihua iron ore to a storage bin by using a conveyor, feeding the iron ore in the storage bin into a ball mill by using an electromagnetic vibrating feeder, conveying the ball-milled iron ore to a classifier, and conveying the iron ore with the granularity of 10mm to a stirring barrel and adding a flotation reagent for flotation. Returning the powder with the granularity of more than 10mm to the ball mill for continuous ball milling.
Iron ore flotation:
A. anion reverse flotation
(1) Reverse flotation of quartz: at 100g/t CaCl2As an activating agent, NaOH is used for adjusting the pH value to 11, 300g/t of starch is used for inhibiting hematite, and 500g/t of fatty acid is used as a collecting agent;
(2) reverse flotation of apatite: adding 300g/t of carboxylic acid as a collecting agent, 300g/t of starch and 200g/t of Na2SiO3Inhibition of hematite, pH 9;
B. reverse flotation of positive ions
Pre-desliming the mother liquor after flotation in the step A
Silica was floated with 0.4kg/t primary amine and 0.6kg/t etheramine, iron minerals were suppressed with 0.5kg/t starch and 0.7kg/t dextrin starch and dextrin, 0.3kg/t sacrificial alcohol, pH10 was added.
In the reverse flotation process, iron ore flotation is carried out under the normal temperature condition. The indexes of the flotation product obtained by a daily treatment 1.5t continuous expansion test are as follows: the grade of the iron ore concentrate is 61.63 percent, and the recovery rate is 72.89 percent.
Example 3
Crushing the Bama iron ore by using a jaw crusher, conveying the crushed Bama iron ore to a storage bin by using a conveyor, feeding the iron ore in the storage bin into a ball mill by using an electromagnetic vibrating feeder, conveying the ball-milled iron ore to a classifier, and conveying the iron ore with the granularity of 10mm to a stirring barrel to be added with a flotation reagent for flotation. Returning the powder with the granularity of more than 10mm to the ball mill for continuous ball milling.
Iron ore flotation:
A. anion reverse flotation
(1) Reverse flotation of quartz: at 150g/t CaCl2As an activating agent, NaOH is used for adjusting the pH value to 10, 300g/t of starch is used for inhibiting hematite, and 500g/t of fatty acid is used as a collecting agent;
(2) reverse flotation of apatite: adding 300g/t of carboxylic acid as a collecting agent, 300g/t of starch and 200g/t of Na2SiO3Inhibition of hematite, pH 10;
B. reverse flotation of positive ions
Pre-desliming the mother liquor after flotation in the step A
0.5kg/t primary amine and ether amine 0.5kg/t flotation silica, 0.5kg/t starch and 0.6kg/t dextrin starch and dextrin were used to suppress iron minerals, 0.3kg/t lauryl sulfate, pH11 was added.
In the reverse flotation process, iron ore flotation is carried out under the normal temperature condition. The indexes of the flotation product obtained by a daily treatment 1.5t continuous expansion test are as follows: the grade of the iron ore concentrate is 63.64 percent, and the recovery rate is 69.67 percent.
Claims (6)
1. Iron ore flotation process, characterized in that it comprises:
A. anion reverse flotation
(1) Reverse flotation of quartz: CaCl below 100g/t2As an activating agent, adjusting the pH value to 11-12 by NaOH, inhibiting hematite by 300-500 g/t starch, and taking 500-700 g/t fatty acid as a collecting agent;
(2) reverse flotation of apatite: using 300g/t carboxylic acid as collector, 300g/t starch and 200g/t Na2SiO3Inhibiting hematite with pH of 9-11
B. Reverse flotation of positive ions
Silica is floated with 0.3-0.5 kg/t primary amine and etheramine, iron minerals are inhibited with 0.5-0.7 kg/t starch and dextrin, and the pH is 10-10.5 or 8-9.
2. Iron ore flotation process according to claim 1, characterized in that the process further comprises coarse grinding of the iron ore to 100 mm.
3. Iron ore flotation process according to claim 1 or 2, characterized in that the process further comprises a preliminary desliming of the mother liquor.
4. Iron ore flotation process according to any of claims 1 to 3, characterized in that at least one of altreol or dodecyl sulphate is also added to the cationic reverse flotation.
5. Iron ore flotation process according to claim 4, characterized in that the addition amount of the sacrificial alcohol or dodecyl sulphate is 0.3 kg/t.
6. An iron ore flotation process according to any one of claims 1 to 5, wherein step A/B uses 250mm to 300mm coarse iron ore as a carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010662392.3A CN111744679A (en) | 2020-07-10 | 2020-07-10 | Iron ore flotation method |
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| CN202010662392.3A CN111744679A (en) | 2020-07-10 | 2020-07-10 | Iron ore flotation method |
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| CN202010662392.3A Pending CN111744679A (en) | 2020-07-10 | 2020-07-10 | Iron ore flotation method |
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| CN101204682A (en) * | 2006-12-19 | 2008-06-25 | 淄博市华联矿业有限责任公司 | Technics of refining Fe and reducing Si using anti-flotation |
| WO2009066167A2 (en) * | 2007-11-22 | 2009-05-28 | Universidade Federal De Minas Gerais - Ufmg | 'amines quantification method in residues of the flotation of iron ore' |
| CN101693222A (en) * | 2009-11-02 | 2010-04-14 | 贵州大学 | Method for separating oolitic hematite |
| CN101856634A (en) * | 2010-05-06 | 2010-10-13 | 中钢集团马鞍山矿山研究院有限公司 | Iron-increasing and silicon-reduction mineral separation method for iron ores |
| CN101912822A (en) * | 2010-08-23 | 2010-12-15 | 长沙矿冶研究院 | Negative/positive ion collector for iron ore flotation and preparation method thereof |
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Application publication date: 20201009 |