CN114939482A - 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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- CN114939482A CN114939482A CN202210606880.1A CN202210606880A CN114939482A CN 114939482 A CN114939482 A CN 114939482A CN 202210606880 A CN202210606880 A CN 202210606880A CN 114939482 A CN114939482 A CN 114939482A
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- Prior art keywords
- molybdenite
- fine grinding
- improving
- flotation
- polysulfide
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- 229910052961 molybdenite Inorganic materials 0.000 title claims abstract description 33
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005188 flotation Methods 0.000 title claims abstract description 17
- 239000012141 concentrate Substances 0.000 claims abstract description 27
- 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
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 229910052977 alkali metal sulfide Inorganic materials 0.000 claims description 12
- 239000005077 polysulfide Substances 0.000 claims description 12
- 229920001021 polysulfide Polymers 0.000 claims description 12
- 150000008117 polysulfides Polymers 0.000 claims description 12
- 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
- RFCQDOVPMUSZMN-UHFFFAOYSA-N 2-Naphthalenethiol Chemical compound C1=CC=CC2=CC(S)=CC=C21 RFCQDOVPMUSZMN-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
- 150000002500 ions Chemical class 0.000 claims description 3
- WZRRRFSJFQTGGB-UHFFFAOYSA-N 1,3,5-triazinane-2,4,6-trithione Chemical compound S=C1NC(=S)NC(=S)N1 WZRRRFSJFQTGGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N thiocyanic acid Chemical compound SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 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
- 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
- 230000003647 oxidation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
Images
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 flotation indexes of molybdenite by reduction and fine grinding is characterized in that a proper amount of vulcanizing agent is added before coarse concentrate fine grinding, so that molybdenite is prevented from being oxidized in the fine grinding process. The method has the beneficial effect of improving the flotation recovery rate of the molybdenite, and the recovery rate of the molybdenum concentration section can be improved by 1-3% on the premise of not changing other process parameters.
Description
Technical Field
The invention belongs to the technical field of molybdenite separation, and particularly relates to a method for improving molybdenite flotation indexes through reduction fine grinding.
Background
Molybdenum, as a rare metal, has excellent properties such as small expansion coefficient, large electrical conductivity, good heat conductivity and the like, and is widely applied to industries such as metallurgy, electrical industry, chemical industry, aerospace and the like. Molybdenum in nature mainly exists in the form of molybdenite, and as the demand for molybdenum resources is increased, the exploitation is gradually increased, and the molybdenum resources gradually have the tendency of being poor, fine and impure, so that the efficient and reasonable recovery of the molybdenum resources is very important. The leaner, finer and impure minerals mean that higher grinding fineness is required, in order to ensure the grade of molybdenum concentrate, a regrinding grading concentration process flow is generally adopted for concentrate obtained by rough concentration in the molybdenite concentration process, and along with the reduction of the molybdenite size fraction, the ratio of the surface to the edge is smaller, the 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 flotation index of molybdenite through reduction and fine grinding, which improves the flotation effect of micro-fine molybdenite and obviously improves the recovery rate of molybdenum concentrate by improving the hydrophobicity of edges of the molybdenite.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for improving flotation indexes of molybdenite through reduction fine grinding includes the steps of crushing and roughing raw ores, adding a vulcanizing agent solution into rough concentrate, uniformly stirring, feeding the rough concentrate into a grinding machine for fine grinding, enabling obtained overflow products to enter fine concentration operation, improving recovery rate of molybdenum concentrate sections by 1-3%, providing a vulcanizing atmosphere for the fine grinding process to prevent molybdenite from being oxidized on one hand, and replacing MoO with S elements on the other hand 4 2– Elemental O of ion, with MoO 4 2– Mo-S is formed, and the hydrophobicity of the molybdenite is improved.
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-naphthylthiol, trithiocyanuric 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 fine grinding operation is carried out, and the overflow fineness is 80-90% of-400 meshes.
Compared with the prior art, the method can improve the flotation recovery rate of molybdenite, and can improve the recovery rate of a molybdenum concentration section by 1-3% 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 contents.
As shown in fig. 1, the steps of the present invention include:
(1) crushing, grinding and roughing raw ores
According to the conventional process in the field, crushing and grinding raw ores to the mass percentage content of-76 mu m grain size fraction of 50-60%, and performing roughing operation on ground ore products.
(2) Adding a vulcanizing agent into the rough concentrate obtained in the step (1), uniformly stirring, and then feeding into a grinding machine for fine grinding operation, wherein the overflow fineness can be selected to be 80-90% of-400 meshes; and (4) carrying out scavenging operation on the roughed tailings.
(3) And (3) carrying out concentration twice and concentrate scavenging once 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 alkali metal sulfide and the polysulfide can play a role in synergistic vulcanization. The amount of the additive is generally 30 to 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 and potassium sulfide; the polysulfide can be one of benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthylthiol, thiocyanic acid trimer, and 1-3-diisopropylthiourea.
The principle of the invention is as follows:
in order to guarantee the grade of the molybdenum concentrate, the rough concentrate needs to be finely ground again before concentration. In the fine grinding process, oxidation reaction is carried out on the edge surface of the molybdenite in the existing oxidation atmosphere, so that molybdenum-oxygen bonds are generated on the surface of the molybdenite, the electromotive potential and the contact angle are changed, the edge surface is hydrophilic, and the floatability of the molybdenite is poor.
The vulcanizing agent is added into the 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– Elemental O and MoO of ions 4 2– Mo-S is formed. The original edge surface which is oxidized to become hydrophilic is made hydrophobic again, the floatability of the micro-fine particle molybdenite is improved, the alkali metal sulfide and the polysulfide are used in a combined mode, the alkali metal sulfide and the polysulfide can play a role in synergistic vulcanization, and the flotation recovery rate is further improved.
The vulcanizing agents in the following examples of the invention include: sodium sulfide, potassium sulfide, benzoyl isothiochlorate, thiochlorourea, p-toluene disulfide, 2-naphthylthiol, cyanuric acid, 1-3-diisopropyl thiourea and the like.
Example 1
As shown in fig. 1, a method for improving molybdenite flotation indexes by reduction fine grinding comprises the following specific steps:
(1) firstly, molybdenite with the molybdenum content of 0.21% is crushed and ground to 55% of-200 meshes, and the obtained ground ore product is subjected to roughing operation to obtain roughed concentrate and roughed tailings.
(2) Adding 20g/t of sodium sulfide and 0.8g/t of 2-naphthylmercaptan into the roughed concentrate obtained in the step (1), uniformly stirring, and feeding into a grinding machine for fine grinding operation, wherein the overflow fineness is 85% of-400 meshes; and (4) carrying out scavenging operation on the roughed tailings.
(3) And (3) carrying out concentration twice and concentrate scavenging once on the ground ore 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% without adding a vulcanizing agent, and by using the method, the recovery rate of the molybdenum concentrate is improved by 2.29%.
Example 2
As shown in fig. 1, a method for improving molybdenite flotation indexes by reduction fine grinding comprises the following specific steps:
(1) firstly, molybdenite with the molybdenum content of 0.21% is crushed and ground to 55% of-200 meshes, and the obtained ground ore product is subjected to roughing operation to obtain roughed concentrate and roughed tailings.
(2) Adding 20g/t of sodium sulfide and 0.8g/t of cyanuric acid into the roughed concentrate obtained in the step (1), uniformly stirring, and feeding into a grinding machine for fine grinding operation, wherein the overflow fineness is 85% of-400 meshes; and (4) carrying out scavenging operation on the roughed tailings.
(3) And (3) carrying out concentration twice and concentrate scavenging once on the ground ore 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 without adding a vulcanizing agent is 88.64 percent, and the recovery rate of the molybdenum concentrate is improved by 1.98 percent by using the method.
Claims (5)
1. A method for improving molybdenite flotation indexes through reduction fine grinding is characterized in that after raw ores are crushed, ground and roughly sorted, a vulcanizing agent solution is added into rough concentrate, the mixture is uniformly stirred and then fed into a grinding machine for fine grinding, the obtained overflow product enters fine sorting operation, the recovery rate of a molybdenum concentrate section is improved by 1-3 percent, the vulcanizing agent provides a vulcanizing atmosphere for the fine grinding process to prevent molybdenite from being oxidized, and S element replaces MoO element to replace MoO element 4 2– Elemental O of ion, with MoO 4 2– Mo-S is formed, and the hydrophobicity of the molybdenite is improved.
2. The method for improving the flotation index of molybdenite by reducing and fine grinding according to claim 1, wherein the vulcanizing agent is a combination of alkali metal sulfide and polysulfide, and the addition amount is 30-50 g/t.
3. The method for improving flotation indexes of molybdenite by reductive fine grinding according to claim 2, 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-naphthylmercaptan, thiocyanuric acid, and 1-3-diisopropylthiourea.
4. The method for improving molybdenite flotation index through reduction fine grinding according to claim 2 or 3, wherein the mass ratio of alkali metal sulfide to polysulfide in the combination is 1: (0.01-0.05).
5. The method for improving molybdenite flotation indexes through reduction fine grinding according to claim 1, wherein in the fine grinding operation, the overflow fineness is 80% -90% of-400 meshes.
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| 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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| CN202210606880.1A CN114939482B (en) | 2022-05-31 | 2022-05-31 | Method for improving molybdenite flotation index through reduction fine grinding |
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| CN114939482B CN114939482B (en) | 2024-02-20 |
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Citations (8)
| 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 |
| US20080067112A1 (en) * | 2006-09-20 | 2008-03-20 | Kuhn Martin C | Methods for the recovery of 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 |
-
2022
- 2022-05-31 CN CN202210606880.1A patent/CN114939482B/en active Active
Patent Citations (8)
| 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 |
| US20080067112A1 (en) * | 2006-09-20 | 2008-03-20 | Kuhn Martin C | Methods for the recovery of 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)
| Title |
|---|
| 张兴旺等, 微细粒辉钼矿疏水聚团浮选研究, vol. 3, no. 6, pages 65 - 68 * |
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