CN114939482B - Method for improving molybdenite flotation index through reduction fine grinding - Google Patents
Method for improving molybdenite flotation index through reduction fine grinding Download PDFInfo
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- CN114939482B CN114939482B CN202210606880.1A CN202210606880A CN114939482B CN 114939482 B CN114939482 B CN 114939482B CN 202210606880 A CN202210606880 A CN 202210606880A CN 114939482 B CN114939482 B CN 114939482B
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- Prior art keywords
- fine grinding
- molybdenite
- improving
- vulcanizing agent
- concentrate
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- 229910052961 molybdenite Inorganic materials 0.000 title claims abstract description 30
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005188 flotation Methods 0.000 title claims abstract description 11
- 239000012141 concentrate Substances 0.000 claims abstract description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 21
- 239000011733 molybdenum Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 claims description 15
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- 229910052977 alkali metal sulfide Inorganic materials 0.000 claims description 10
- 229920001021 polysulfide Polymers 0.000 claims description 10
- 239000005077 polysulfide Substances 0.000 claims description 10
- 150000008117 polysulfides Polymers 0.000 claims description 10
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 6
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 6
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 5
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 4
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 claims description 4
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 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
- B03D2201/00—Specified effects produced by the flotation agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A method for improving the floatation index of molybdenite by reducing fine grinding is to add proper amount of vulcanizing agent before fine grinding of rough concentrate, so as to prevent oxidation of molybdenite in the fine grinding process. The method has the beneficial effect of improving the recovery rate of molybdenite flotation, and the recovery rate of the molybdenum concentration section can be improved by 1-3 percent on the premise of not changing other process parameters.
Description
Technical Field
The invention belongs to the technical field of molybdenite beneficiation, and particularly relates to a method for improving a molybdenite flotation index by reducing fine grinding.
Background
Molybdenum is used as a rare metal, has the excellent properties of small expansion coefficient, high electric conductivity, good heat conduction performance and the like, and is widely applied to industries of metallurgy, electric, chemical industry, aerospace and the like. Molybdenum in nature exists mainly in the form of molybdenite, along with the gradual increase of continuous mode of molybdenum resource demand, the exploitation rule is gradually increased, and molybdenum resources gradually have the tendency of lean, thin and impurity, so that the efficient and reasonable recovery of molybdenum resources is particularly important. The leaner, finer and miscellaneous minerals mean that a higher grinding fineness is required, and in order to ensure the grade of molybdenum concentrate, a process flow of regrinding and classifying and concentrating is generally adopted for concentrate obtained by roughing in the molybdenite concentration process, and as the size of the molybdenite is reduced, the smaller the 'face' and 'edge' ratio is, the more newly generated 'edge' is easy to oxidize and hydrophilic, and further the recovery rate of the molybdenum concentrate is lower.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for improving the molybdenite flotation index by reducing fine grinding, which improves the micro-fine particle molybdenite flotation effect and obviously improves the recovery rate of molybdenum concentrate by improving the hydrophobicity of the molybdenite 'edges'.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method for improving floatation index of molybdenite by reduction fine grinding includes such steps as crushing raw ore, coarse separation, adding solution of sulfurizing agent to coarse concentrate, stirring, fine grinding, concentrating the overflow product by fine grinding, and high recovery rate (1-3%) of molybdenum concentrate, and providing sulfurizing atmosphere to fine grinding to prevent oxidation of molybdenite and S element to replace MoO 4 2– Ionic O element and MoO 4 2– Mo-S is formed to improve the hydrophobicity of molybdenite.
In the invention, the vulcanizing agent is a combination of alkali metal sulfide and polysulfide, and the addition amount is 30-50 g/t. Preferably, the alkali metal sulfide is one of sodium sulfide and potassium sulfide, and the polysulfide is one of benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthalene thiophenol, cyanuric acid and 1-3-diisopropylthiourea.
Preferably, the mass ratio of alkali metal sulfide to polysulfide in the combination is 1: (0.01-0.05).
In the invention, the overflow fineness of the fine grinding operation is 80-90% of the 400 mesh ratio.
Compared with the prior art, the invention can improve the recovery rate of molybdenite flotation, and the recovery rate of a molybdenum concentration section can be improved by 1-3 percent by adding a proper amount of vulcanizing agent before fine grinding of rough concentrate on the premise of not changing other process parameters.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the scope of the present invention is not limited to the above description.
As shown in fig. 1, the steps of the present invention include:
(1) Crushing, grinding and roughing raw ore
Crushing raw ore, grinding to the mass percentage of-76 mu m size fraction of 50-60% according to the conventional process in the field, and carrying out roughing operation on the ground ore product.
(2) Adding a vulcanizing agent into the rough concentrate obtained in the step (1), uniformly stirring, and then feeding the rough concentrate into a mill for fine grinding operation, wherein the overflow fineness can be selected to be 400 meshes with 80% -90% of the ratio; the roughing tailings enter scavenging operation.
(3) And (3) carrying out twice concentration and one concentrate scavenging operation on the ground ore product (namely overflow product) obtained in the step (2).
The vulcanizing agent used in the invention is a composition of alkali metal sulfide and polysulfide, and the two can play a role in synergetic vulcanization. The addition amount can be generally selected to be 30-50 g/t. The mass ratio of alkali metal sulfide to polysulfide in the vulcanizing agent is generally selected to be 1: (0.01-0.05). Illustratively, the alkali metal sulfide may be one of sodium sulfide, potassium sulfide; the polysulfide can be one of benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthalene thiophenol, cyanuric acid and 1-3-diisopropyl thiourea.
The principle of the invention is as follows:
to ensure the grade of the molybdenum concentrate, the coarse concentrate needs to be finely ground again before concentration. In the fine grinding process, the oxidizing atmosphere causes the 'edge' surface of the molybdenite to generate oxidation reaction, so that 'molybdenum-oxygen bond' is generated on the surface of the molybdenite, the electrokinetic potential and the contact angle are changed, and the 'edge' surface is hydrophilic, thereby causing the floatability of the molybdenite to be poor.
The vulcanizing agent is added into ore pulp before fine grinding, so that a vulcanizing atmosphere can be provided for the ore grinding process, the molybdenite is prevented from being oxidized in the fine grinding process, and meanwhile, the S element in the vulcanizing agent can replace MoO 4 2– O element of ionPlain and MoO 4 2– Mo-S is formed. The 'prismatic' surface which is oxidized to be hydrophilic is hydrophobic again, the floatability of the micro-fine molybdenite is improved, and the alkali metal sulfide and polysulfide are combined for use, so that the two can play a role of synergistic vulcanization, and the flotation recovery rate is further improved.
The vulcanizing agents in the following examples of the present invention include: sodium sulfide, potassium sulfide, benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthalene thiophenol, cyanuric acid, 1-3-diisopropyl thiourea and other agents.
Example 1
As shown in fig. 1, a method for improving the molybdenite flotation index by reducing fine grinding comprises the following specific steps:
(1) Firstly, crushing and grinding molybdenite with the molybdenum content of 0.21 percent to the size of-200 meshes with the proportion of 55 percent, and carrying out roughing operation on the obtained ground ore product to obtain roughing concentrate and roughing tailings.
(2) Adding 20g/t sodium sulfide and 0.8g/t 2-naphthalene thiophenol into the rough concentrate obtained in the step (1), stirring uniformly, and then feeding into a mill for fine grinding, wherein the overflow fineness is-400 meshes accounting for 85%; the roughing tailings enter scavenging operation.
(3) And (3) carrying out twice concentration and one-time concentrate scavenging operation on the ore grinding product obtained in the step (2) to obtain molybdenum concentrate, wherein the recovery rate is 90.93%.
The recovery rate of the obtained molybdenum concentrate is 88.64 percent when the vulcanizing agent is not added, and the recovery rate of the molybdenum concentrate is improved by 2.29 percent by using the method.
Example 2
As shown in fig. 1, a method for improving the molybdenite flotation index by reducing fine grinding comprises the following specific steps:
(1) Firstly, crushing and grinding molybdenite with the molybdenum content of 0.21 percent to the size of-200 meshes with the proportion of 55 percent, and carrying out roughing operation on the obtained ground ore product to obtain roughing concentrate and roughing tailings.
(2) Adding 20g/t sodium sulfide and 0.8g/t cyanuric acid into the rough concentrate obtained in the step (1), uniformly stirring, and then feeding into a mill for fine grinding, wherein the overflow fineness is-400 meshes accounting for 85%; the roughing tailings enter scavenging operation.
(3) And (3) carrying out twice concentration and one-time concentrate scavenging operation on the ore grinding product obtained in the step (2) to obtain molybdenum concentrate, wherein the recovery rate is 90.62%.
The recovery rate of the obtained molybdenum concentrate is 88.64 percent when the vulcanizing agent is not added, and the recovery rate of the molybdenum concentrate is improved by 1.98 percent by using the method.
Claims (2)
1. A method for improving the floatation index of molybdenite by reducing fine grinding is characterized in that after raw ore is crushed, ground and roughed, vulcanizing agent solution is firstly added into rough concentrate, uniformly stirred, then the rough concentrate is fed into a mill for fine grinding, the obtained overflow product enters the concentration operation, the recovery rate of a molybdenum concentrate section is improved by 1-3 percent, the vulcanizing agent provides a vulcanization atmosphere for the fine grinding process to prevent oxidation of molybdenite, and S element is used for replacing MoO on the other hand 4 2 – Ionic O element and MoO 4 2 – Forming Mo-S, improving the hydrophobicity of molybdenite; the vulcanizing agent is a combination of alkali metal sulfide and polysulfide, the addition amount is 30-50 g/t, and the mass ratio of the alkali metal sulfide to polysulfide in the combination is 1: (0.01-0.05), wherein the alkali metal sulfide is one of sodium sulfide and potassium sulfide, and the polysulfide is one of benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthalene thiophenol, cyanuric acid and 1-3-diisopropyl thiourea.
2. The method for reducing fine grinding to improve the molybdenite flotation index according to claim 1, wherein the fine grinding operation has an overflow fineness of-400 mesh with a ratio of 80% -90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606880.1A CN114939482B (en) | 2022-05-31 | 2022-05-31 | Method for improving molybdenite flotation index through reduction fine grinding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210606880.1A CN114939482B (en) | 2022-05-31 | 2022-05-31 | Method for improving molybdenite flotation index through reduction fine grinding |
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| CN114939482A CN114939482A (en) | 2022-08-26 |
| CN114939482B true CN114939482B (en) | 2024-02-20 |
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| CN202210606880.1A Active CN114939482B (en) | 2022-05-31 | 2022-05-31 | Method for improving molybdenite flotation index through reduction fine grinding |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196073A (en) * | 1977-04-22 | 1980-04-01 | Canadian Industries Limited | Hydrophilic thio compounds as selective depressants in the flotation separation of copper and molybdenum |
| CN102069037A (en) * | 2011-01-20 | 2011-05-25 | 西安建筑科技大学 | Composite hydrocarbon oil molybdenum flotation collecting agent and preparation method thereof |
| WO2015157498A1 (en) * | 2014-04-11 | 2015-10-15 | Tessenderlo Kerley, Inc. | Depression of copper and iron sulfides in molybdenite flotation circuits |
| CN105903552A (en) * | 2016-04-26 | 2016-08-31 | 中南大学 | Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore |
| CN107986333A (en) * | 2017-12-13 | 2018-05-04 | 中南大学 | A kind of molybdate solution or tungstate solution containing molybdenum and trithiocyanuric acid（Salt）The method of reaction synthesis Thiomolybdate |
| CN111215252A (en) * | 2020-01-15 | 2020-06-02 | 辽宁科技大学 | Ore dressing method for silver guiding recovery in separation process of float sulfide ore bulk concentrate |
| CN113996445A (en) * | 2021-09-23 | 2022-02-01 | 江西铜业集团有限公司 | Flotation composite collecting agent and flotation method for low-grade associated molybdenum-copper-sulfur ore |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080067112A1 (en) * | 2006-09-20 | 2008-03-20 | Kuhn Martin C | Methods for the recovery of molybdenum |
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2022
- 2022-05-31 CN CN202210606880.1A patent/CN114939482B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196073A (en) * | 1977-04-22 | 1980-04-01 | Canadian Industries Limited | Hydrophilic thio compounds as selective depressants in the flotation separation of copper and molybdenum |
| CN102069037A (en) * | 2011-01-20 | 2011-05-25 | 西安建筑科技大学 | Composite hydrocarbon oil molybdenum flotation collecting agent and preparation method thereof |
| WO2015157498A1 (en) * | 2014-04-11 | 2015-10-15 | Tessenderlo Kerley, Inc. | Depression of copper and iron sulfides in molybdenite flotation circuits |
| CN105903552A (en) * | 2016-04-26 | 2016-08-31 | 中南大学 | Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore |
| CN107986333A (en) * | 2017-12-13 | 2018-05-04 | 中南大学 | A kind of molybdate solution or tungstate solution containing molybdenum and trithiocyanuric acid（Salt）The method of reaction synthesis Thiomolybdate |
| CN111215252A (en) * | 2020-01-15 | 2020-06-02 | 辽宁科技大学 | Ore dressing method for silver guiding recovery in separation process of float sulfide ore bulk concentrate |
| CN113996445A (en) * | 2021-09-23 | 2022-02-01 | 江西铜业集团有限公司 | Flotation composite collecting agent and flotation method for low-grade associated molybdenum-copper-sulfur ore |
Non-Patent Citations (1)
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