CN111921699A - Novel efficient iron separation process for molybdenum separation tailings - Google Patents
Novel efficient iron separation process for molybdenum separation tailings Download PDFInfo
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- CN111921699A CN111921699A CN202010602848.7A CN202010602848A CN111921699A CN 111921699 A CN111921699 A CN 111921699A CN 202010602848 A CN202010602848 A CN 202010602848A CN 111921699 A CN111921699 A CN 111921699A
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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Abstract
The invention discloses a novel high-efficiency iron-selecting and magnetic-separating process for magnetic iron in molybdenum tailings, which can obtain iron ore concentrate with high recovery rate and high grade from molybdenum tailings with ultralow grade of 2.0 percent and ultrafine particle fraction of-600 meshes of more than 88 percent through a series of ore-separating processes. Has the advantages that: compared with the existing iron separation process of the molybdenum tailings, the novel high-efficiency iron separation process of the molybdenum tailings not only can improve the recovery rate of the iron ore concentrate, but also can obviously improve the grade of the recovered iron ore concentrate, and has good practicability.
Description
Technical Field
The invention relates to the technical field of molybdenum tailing iron selection, in particular to a novel efficient iron selection process for molybdenum tailings.
Background
For some multi-metal symbiotic molybdenum ore deposits, when the molybdenum ore is subjected to flotation recovery, the total iron content in the molybdenum flotation tailings can reach more than 4.73%, the molybdenum flotation tailings mainly comprise magnetite, and the iron metal content in the magnetite can account for 45% of the total iron, so that the iron minerals in the molybdenum flotation tailings have extremely high recovery value.
However, in practical production, the recovery rate of the iron concentrate from the molybdenum flotation tailings and the grade of the recovered iron concentrate are low and the economic benefit is poor due to the limitation of the iron separation process.
Disclosure of Invention
The invention aims to solve the problems and provide a novel high-efficiency iron separation process for molybdenum separation tailings, which can improve the recovery rate of iron ore concentrate, obviously improve the grade of the recovered iron ore concentrate, and has good practicability, and details are explained below.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a novel process for efficiently selecting iron from molybdenum tailings, which comprises the following steps:
(1) crushing molybdenum ore, performing magnetic roughing on low-grade molybdenum tailings subjected to flotation to obtain roughed tailings, performing primary magnetic scavenging on the roughed tailings, and performing secondary magnetic scavenging to obtain tailings I, wherein the magnetic roughed tailings, the primary magnetic scavenging and the secondary magnetic scavenging all adopt a bare magnetic tailings reclaimer, and the magnetic field intensity is 0.3T;
(2) after the concentrate obtained by magnetic roughing, primary magnetic scavenging and secondary magnetic scavenging is subjected to primary grading, fine ore enters primary magnetic concentration, tailings II are generated after the concentration, and the coarse ore returns to primary grading after being subjected to primary regrinding;
(3) after the concentrate obtained by the primary magnetic concentration is subjected to secondary classification, the fine ore enters secondary magnetic concentration, the coarse ore is subjected to secondary regrinding and then returns to secondary classification, and both the primary classification and the secondary classification adopt a cyclone group;
(4) the concentrate obtained by the secondary magnetic concentration is subjected to tertiary magnetic concentration, the obtained concentrate enters a magnetic suspension magnetic separator for concentration, the primary magnetic concentration, the secondary magnetic concentration and the tertiary magnetic concentration all adopt a concentration and slag reduction magnetic separator, the magnetic suspension concentration is adopted for the fourth concentration, and the magnetic field intensity is 0.18-0.3T;
(5) and concentrating and filtering the concentrate obtained by the concentration of the magnetic suspension magnetic separator to obtain iron concentrate, returning the concentrate generated after the fine scavenging of the tailings obtained by the concentration to primary classification, wherein the fine scavenging adopts a permanent magnet drum type magnetic separator, and the magnetic field intensity is 0.18T.
And (3) as an important design of the scheme, returning the filtrate filtered in the step (5) to a thickener for concentration operation and recycling.
As the optimization design of the scheme, the magnetic field intensity of magnetic roughing, primary magnetic scavenging, secondary magnetic scavenging, primary magnetic concentration and secondary magnetic concentration is 0.3T, and the magnetic field intensity of tertiary magnetic concentration and fine scavenging is 0.18T.
As the optimal design of present case, quartic concentration includes magnetic suspension magnetic separator concentration one in step (4), magnetic suspension magnetic separator concentration two, magnetic suspension magnetic separator concentration three and magnetic suspension magnetic separator concentration four, the concentrate that obtains after the tertiary magnetic concentration both can get into magnetic suspension magnetic separator concentration one simultaneously, magnetic suspension magnetic separator concentration two, magnetic suspension magnetic separator concentration three and magnetic suspension magnetic separator concentration four carry out four parallel operation, also can get into magnetic suspension magnetic separator concentration one simultaneously earlier, two parallel operation of magnetic suspension magnetic separator concentration, its concentrate gets into magnetic suspension magnetic separator concentration three again and magnetic suspension magnetic separator concentration four parallel operation, carry out the operation of establishing ties concentration.
Has the advantages that: compared with the existing iron separation process of the molybdenum tailings, the novel high-efficiency iron separation process of the molybdenum tailings not only can improve the recovery rate of iron ore concentrate, but also obviously improves the grade of the recovered iron ore concentrate and has good practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a process flow diagram of magnetic levitation magnetic separator beneficiation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the novel process for efficiently selecting iron from molybdenum tailings provided by the invention comprises the following steps:
(1) crushing molybdenum ore, performing magnetic roughing on low-grade molybdenum tailings subjected to flotation to obtain roughed tailings, performing primary magnetic scavenging on the roughed tailings, and performing secondary magnetic scavenging to obtain tailings I, wherein the magnetic roughed tailings, the primary magnetic scavenging and the secondary magnetic scavenging all adopt a bare magnetic tailings reclaimer, the magnetic field strength is 0.3T, the magnetic field strength of 0.3T can reduce the metal loss rate, and the recovery rate and the grade of iron ore concentrate are improved;
(2) after the concentrate obtained by magnetic roughing, primary magnetic scavenging and secondary magnetic scavenging is subjected to primary grading, fine ore enters primary magnetic concentration, tailings II are generated after the concentration, and the coarse ore returns to primary grading after being subjected to primary regrinding;
(3) the fine ore obtained by the primary magnetic concentration enters the secondary magnetic concentration after the secondary classification, the coarse ore returns to the secondary classification after the secondary regrinding, both the primary classification and the secondary classification adopt cyclone sets with models of phi 250X14 and phi 150X16, the primary regrinding and the secondary regrinding adopt overflow ball mills of MQY 4.0.0X 7.5m and MQY 3.2.2X 6.4m, and in the production process, the fineness of the ground ore can be increased by adjusting the proportion and the filling rate of steel balls in the mills aiming at molybdenum tailings with different grades;
(4) and the concentrate obtained by the secondary magnetic concentration is subjected to tertiary magnetic concentration, and then the obtained concentrate enters a magnetic suspension magnetic separator for four-time concentration, wherein the primary magnetic concentration, the secondary magnetic concentration and the tertiary magnetic concentration all adopt a refining slag-reducing magnetic separator, and the magnetic field strengths are 0.3T, 0.3T and 0.18T respectively. The conventional permanent magnet drum type magnetic separator has poor separation capability and serious metal loss in the separation operation, and the metal loss in the separation operation is small after the magnetic separator for refining and slag reduction is adopted, so that the recovery rate of iron ore concentrate is improved;
(5) the concentrate obtained by the four-time concentration is concentrated and filtered to obtain iron concentrate, the filtering equipment is a filter press, filtered filtrate returns to the thickener for water recycling, concentrate generated after the tailings obtained by the magnetic suspension magnetic separator are subjected to the fine scavenging returns to the primary classification, and the concentrate is low in concentration and can be diluted to enter the primary classified ore pulp after returning to the primary classification, so that the adjustment of the operation concentration is facilitated, the ore pulp grinding classification efficiency is improved, the permanent magnet cylinder type magnetic separator is adopted for the fine scavenging, and the magnetic field intensity is 0.18T.
In order to further improve the grade and the recovery efficiency of the iron ore concentrate, the concentration operation of the magnetic suspension magnetic separator consists of four magnetic suspension concentration machines, as shown in fig. 2, the concentrate obtained after the three times of magnetic concentration can be simultaneously fed into a magnetic suspension magnetic separator first concentration step, a magnetic suspension magnetic separator second concentration step, a magnetic suspension magnetic separator third concentration step and a magnetic suspension magnetic separator fourth concentration step (at this time, the valve one is closed, and the valve two and the valve three are opened) to carry out four parallel concentration operations, or can be simultaneously fed into the magnetic suspension magnetic separator first concentration step, the magnetic suspension magnetic separator second concentration step, after the preliminary concentration step, the concentrate enters a magnetic suspension magnetic separator concentration three and a magnetic suspension magnetic separator concentration four at the same time (at the moment, a valve I is opened, a valve II and a valve III are closed), the design can lead 4 magnetic suspension concentration machines of the original magnetic suspension magnetic separator to have the production conditions of realizing parallel connection and 2+2 series connection; as for the specific adopted magnetic suspension magnetic separator selection operation mode, the free switching can be realized by controlling the three gate valves on the premise of not influencing the production according to the production operation index condition.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. A novel high-efficiency iron selection process for molybdenum selection tailings is characterized by comprising the following steps:
(1) crushing molybdenum ore, performing magnetic roughing on low-grade molybdenum tailings subjected to flotation to obtain roughed tailings, performing primary magnetic scavenging on the roughed tailings, and performing secondary magnetic scavenging to obtain tailings I, wherein the magnetic roughed tailings, the primary magnetic scavenging and the secondary magnetic scavenging all adopt a bare magnetic tailings reclaimer, and the magnetic field intensity is 0.3T;
(2) after the concentrate obtained by magnetic roughing, primary magnetic scavenging and secondary magnetic scavenging is subjected to primary grading, fine ore enters primary magnetic concentration, tailings II are generated after the concentration, and the coarse ore returns to primary grading after being subjected to primary regrinding;
(3) after the concentrate obtained by the primary magnetic concentration is subjected to secondary classification, the fine ore enters secondary magnetic concentration, the coarse ore is subjected to secondary regrinding and then returns to secondary classification, and both the primary classification and the secondary classification adopt a cyclone group;
(4) the concentrate obtained by the secondary magnetic concentration is subjected to tertiary magnetic concentration, the obtained concentrate enters a magnetic suspension magnetic separator for concentration, the primary magnetic concentration, the secondary magnetic concentration and the tertiary magnetic concentration all adopt a concentration and slag reduction magnetic separator, the magnetic suspension concentration is adopted for the fourth concentration, and the magnetic field intensity is 0.18-0.3T;
(5) and concentrating and filtering the concentrate obtained by the concentration of the magnetic suspension magnetic separator to obtain iron concentrate, returning the concentrate generated after the fine scavenging of the tailings obtained by the concentration to primary classification, wherein the fine scavenging adopts a permanent magnet drum type magnetic separator, and the magnetic field intensity is 0.18T.
2. The novel process for efficiently selecting iron from molybdenum tailings as claimed in claim 1, which is characterized in that: and (5) returning the filtered filtrate in the step (5) to a thickener to enter a concentration operation for recycling.
3. The novel process for efficiently selecting iron from molybdenum tailings as claimed in claim 1, which is characterized in that: the magnetic field intensity of the magnetic roughing, the primary magnetic scavenging, the secondary magnetic scavenging, the primary magnetic concentration and the secondary magnetic concentration is 0.3T, and the magnetic field intensity of the tertiary magnetic concentration and the fine scavenging is 0.18T.
4. The novel process for efficiently selecting iron from molybdenum tailings as claimed in claim 1, which is characterized in that: the four-time concentration in the step (4) comprises a first magnetic suspension magnetic separator concentration step, a second magnetic suspension magnetic separator concentration step, a third magnetic suspension magnetic separator concentration step and a fourth magnetic suspension magnetic separator concentration step, concentrate obtained after the three-time magnetic concentration step can simultaneously enter the first magnetic suspension magnetic separator concentration step, the second magnetic suspension magnetic separator concentration step, the third magnetic suspension magnetic separator concentration step and the fourth magnetic suspension magnetic separator concentration step to carry out four-stage parallel operation, or can simultaneously enter the first magnetic suspension magnetic separator concentration step and the second magnetic suspension magnetic separator concentration step to carry out parallel operation, and concentrate enters the third magnetic suspension magnetic separator concentration step and the fourth magnetic suspension magnetic separator concentration step to carry out series concentration operation.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0487648A (en) * | 1990-07-27 | 1992-03-19 | Sumitomo Metal Mining Co Ltd | Method for refining molybdenum ore |
| CN103657841A (en) * | 2013-12-09 | 2014-03-26 | 攀钢集团矿业有限公司 | Production method of vanadium-titanium-ferrum concentrate |
| CN104028369A (en) * | 2014-06-05 | 2014-09-10 | 中钢集团马鞍山矿山研究院有限公司 | Ore dressing method for improving ore dressing recovery rate of low-grade refractory specularite |
| WO2017185946A1 (en) * | 2016-04-26 | 2017-11-02 | 上海鑫和镍业科技有限公司 | Method for processing low-grade laterite nickel ore and beneficiation method therefor |
| CN108114805A (en) * | 2016-11-28 | 2018-06-05 | 鞍钢集团矿业有限公司 | A kind of lean hematite stage grinding-magnetic separation shifts to an earlier date process for discarding tailings |
| CN108246514A (en) * | 2018-01-15 | 2018-07-06 | 中国地质科学院矿产综合利用研究所 | Full-grain-level flotation separation method for clay type pyrite |
| CN111167614A (en) * | 2019-11-25 | 2020-05-19 | 南华大学 | Flotation method for copper-molybdenum sulfide ore |
-
2020
- 2020-06-29 CN CN202010602848.7A patent/CN111921699B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0487648A (en) * | 1990-07-27 | 1992-03-19 | Sumitomo Metal Mining Co Ltd | Method for refining molybdenum ore |
| CN103657841A (en) * | 2013-12-09 | 2014-03-26 | 攀钢集团矿业有限公司 | Production method of vanadium-titanium-ferrum concentrate |
| CN104028369A (en) * | 2014-06-05 | 2014-09-10 | 中钢集团马鞍山矿山研究院有限公司 | Ore dressing method for improving ore dressing recovery rate of low-grade refractory specularite |
| WO2017185946A1 (en) * | 2016-04-26 | 2017-11-02 | 上海鑫和镍业科技有限公司 | Method for processing low-grade laterite nickel ore and beneficiation method therefor |
| CN108114805A (en) * | 2016-11-28 | 2018-06-05 | 鞍钢集团矿业有限公司 | A kind of lean hematite stage grinding-magnetic separation shifts to an earlier date process for discarding tailings |
| CN108246514A (en) * | 2018-01-15 | 2018-07-06 | 中国地质科学院矿产综合利用研究所 | Full-grain-level flotation separation method for clay type pyrite |
| CN111167614A (en) * | 2019-11-25 | 2020-05-19 | 南华大学 | Flotation method for copper-molybdenum sulfide ore |
Non-Patent Citations (1)
| Title |
|---|
| 白晓卿: "《浮钼尾矿综合回收磁铁矿工艺改造及实践》", 《现代矿业》 * |
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