CN105381874A - Beneficiation method for improving grade of copper-cobalt magnetic concentrate - Google Patents
Beneficiation method for improving grade of copper-cobalt magnetic concentrate Download PDFInfo
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- CN105381874A CN105381874A CN201510674249.5A CN201510674249A CN105381874A CN 105381874 A CN105381874 A CN 105381874A CN 201510674249 A CN201510674249 A CN 201510674249A CN 105381874 A CN105381874 A CN 105381874A
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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
- B03C1/002—High gradient 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
- B03C1/005—Pretreatment specially adapted for magnetic separation
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Abstract
The invention discloses a beneficiation method for improving the grade of copper-cobalt magnetic concentrate. According to the magnetic separation, magnetic substance and an objective mineral are effectively separated, the method is suitable for oxidized ores containing more magnetic substance, and the grade of the magnetic concentrate can be effectively improved. According to the beneficiation method, a high-gradient magnetic separator is used for low-intensity magnetic separation for the first time, the background field intensity of a low-intensity magnetic separator is low, the gradient of a magnetic field is high, and therefore the strong magnetic substance which cannot be separated by a permanent magnet magnetic separator adopted in the prior art can be separated. The high-gradient magnetic separator with the background field intensity ranging from 0.08 T to 0.15 T is adopted for removing the strong magnetic substance in the magnetic concentrate, and therefore the grade of the copper-cobalt magnetic concentrate can be improved.
Description
Technical field
The present invention relates to a kind of oxide ore magnetic separation beneficiation method, particularly relate to a kind of beneficiation method improving copper cobalt magnetic concentrate grade.
Background technology
As everyone knows, oxide ore flotation is a great problem of ore dressing circle.Because oxide ore is in secondary mineralizing process, in target minreal (copper, cobalt) and part gangue, absorption or machinery are mixed into the very strong impurity of the magnetic separation such as Fe, Mn and make them have magnetic.According to ore magnetic detection result, in ore, copper, cobalt, iron and part gangue specific susceptibility alter a great deal.Be low to moderate very much under very high background lectromagnetism field, adopt high gradient magnetic separator, above mineral all have magnetic separation.Copper-cobalt oxidation ore magnetic separation technology, utilizes this characteristic of ore to reclaim the irretrievable copper cobalt ore of flotation exactly.Flotation tailing again magnetic separation process has become the effective means improving oxide ore recovery rate in ore-dressing.But because flotation tailing copper cobalt grade is very low, its magnetic concentrate grade is also very low.
The Chinese patent of application number 201310304979.7 discloses a kind of beneficiation method of cobalt copper oxide, the Chinese patent of application number 201510130739.9 discloses a kind of beneficiation method of the cupric oxide ore containing magnetic impurity, two patents all propose with flotation-magnetic separation combined process flow process cupric oxide (cobalt) ore deposit, concrete technology is all reclaim magnetic copper (cobalt) in flotation tailing with high field intensity high-gradient magnetic separation, in raising magnetic separation rough concentrate grade, two patents all adopt magnetic separation rough concentrate, and high field intensity High-gradient Magnetic is selected again.But two patents all cannot remove the ferromagnetic substance (Armco magnetic iron, magnetic gangue) in magnetic concentrate.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provides the magnetic selection method of a kind of effective separation magnetisable material and target minreal, and the inventive method is applicable to, containing the more oxide ore of magnetisable material, can effectively improve magnetic concentrate grade.
In order to achieve the above object, a kind of beneficiation method improving copper cobalt magnetic concentrate grade of the present invention, comprises the steps:
1, copper-cobalt oxidation ore flotation tailing is milled to-0.074mm and accounts for 70-90%, be made into the ore pulp that concentration is 10-40%, carry out strong magnetic with 0.8-1.2T background lectromagnetism field high gradient magnetic separator to roughly select, obtain strong magnetic rougher concentration and strong magnetic rougher tailings, strong magnetic rougher tailings is final magnetic tailing, it is selected that strong magnetic rougher concentration carries out strong magnetic with 0.8-1.2T background lectromagnetism field high gradient magnetic separator again, and obtain the selected concentrate of strong magnetic and strong magnetic cleaner tailings, strong magnetic cleaner tailings is final magnetic middling ore;
2, the selected concentrate of above-mentioned strong magnetic is milled to-0.037mm and accounts for 50-80%, be made into the ore pulp that concentration is 10-40%, low intensity magnetic separation is carried out with 0.08-0.15T background lectromagnetism field high gradient magnetic separator, obtain low intensity magnetic separation concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation concentrate is final magnetic concentrate, and low intensity magnetic separation mine tailing is final magnetic middling ore.
As preferably, carry out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator in step 1 and roughly select with strong magnetic selected.
As preferably, in step 2, selected for strong magnetic concentrate is milled to-0.037mm and accounts for 65%, be made into the ore pulp that concentration is 20%.
As preferably, in step 2, carry out low intensity magnetic separation with 0.1T background lectromagnetism field high gradient magnetic separator.
As preferably, step 2 first carries out magnetic detection with low field intensity high gradient magnetic separator to the varigrained selected concentrate of strong magnetic of regrinding, and determines the separation of target minreal and magnetic impurity, thus determines the grinding particle size of the selected concentrate of strong magnetic.
The present invention adopts 0.08-0.15T background lectromagnetism field high gradient magnetic separator to carry out low intensity magnetic separation, the Chinese patent of application number 201510130739.9 adopts magnetic field intensity to be that the permanent magnetic separator of 0.2-0.5T carries out low intensity magnetic separation, weak magnetic separator background lectromagnetism field of the present invention is low, but magnetic field gradient is high, the what is called " ferromagnetic substance " that prior art adopts permanent magnetic separator not choose can be chosen.The magnetisable material chosen by the low intensity magnetic separation of low background lectromagnetism field high gradient is defined as the ferromagnetic substance in magnetic concentrate by the present invention, these what is called " ferromagnetic substance " belong to weak magnetic substance in conventional magnetic separation, but it is chosen in High-gradient Magnetic and belongs to ferromagnetic substance, it is chosen in the High-gradient Magnetic of higher background lectromagnetism field and must stay in magnetic concentrate.High gradient magnetic separator is a kind of magnetic separator, its feature is that magnetizing field passes through working volume uniformly, medium is magnetized uniformly, in any position in magnetization space, the order of magnitude of gradient is identical, it improves 10-100 doubly than general magnet separator magnetic field gradient, the material that particle is more tiny so it can reclaim, magnetic is more weak.From High-gradient Magnetic concentrate selection, also do not remove the method for so-called " ferromagnetic substance " in currently available technology, do not have prior art that high gradient magnetic separator is used for low intensity magnetic separation.Strongly magnetic mineral in general sense only need with conventional weak magnetic separator magnetic separation, and the present invention finds to adopt the high gradient magnetic separator of 0.08-0.15T background lectromagnetism field can choose ferromagnetic substance in magnetic concentrate by great many of experiments.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Embodiment 1
Certain copper-cobalt oxidation ore flotation tailing external is milled to-0.074mm and accounts for 70%, be made into the ore pulp that concentration is 20%, carry out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator to roughly select, obtain strong magnetic rougher concentration and strong magnetic rougher tailings (high intensity magnetic separation mine tailing), it is selected that strong magnetic rougher concentration carries out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator again, obtains the selected concentrate of strong magnetic (high intensity magnetic separation concentrate) and strong magnetic cleaner tailings (high intensity magnetic separation chats); The selected concentrate of above-mentioned strong magnetic is milled to-0.037mm and accounts for 65%, be made into the ore pulp that concentration is 20%, carry out low intensity magnetic separation with 0.1T background lectromagnetism field high gradient magnetic separator, obtain low intensity magnetic separation concentrate and low intensity magnetic separation mine tailing.Each ore deposit testing result is in Table 1-1 and table 1-2:
The high intensity magnetic separation result of table 1-1 embodiment 1
The low intensity magnetic separation result of table 1-2 embodiment 1
In whole magnetic separation process, final concentrate is low intensity magnetic separation concentrate, and mine tailing is high intensity magnetic separation mine tailing, and chats is high intensity magnetic separation chats and low intensity magnetic separation mine tailing.
From above-mentioned testing result:
1) final concentrate improves copper grade 13.7 times relative to flotation tailing, improves copper grade 1.35 times relative to high intensity magnetic separation concentrate; The selected rate of recovery 86.8% of copper.
2) low intensity magnetic separation mine tailing throws the iron removing in high intensity magnetic separation concentrate 49.8%.
Embodiment 2
Certain copper-cobalt oxidation ore flotation tailing external is milled to-0.074mm and accounts for 90%, be made into the ore pulp that concentration is 20%, carry out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator to roughly select, obtain strong magnetic rougher concentration and strong magnetic rougher tailings (high intensity magnetic separation mine tailing), it is selected that strong magnetic rougher concentration carries out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator again, obtains the selected concentrate of strong magnetic (high intensity magnetic separation concentrate) and strong magnetic cleaner tailings (high intensity magnetic separation chats); The selected concentrate of above-mentioned strong magnetic is milled to-0.037mm and accounts for 65%, be made into the ore pulp that concentration is 20%, carry out low intensity magnetic separation with 0.1T background lectromagnetism field high gradient magnetic separator, obtain low intensity magnetic separation concentrate and low intensity magnetic separation mine tailing.Each ore deposit testing result is in Table 2-1 and table 2-2:
The high intensity magnetic separation result of table 2-1 embodiment 2
The low intensity magnetic separation result of table 2-2 embodiment 2
In whole magnetic separation process, final concentrate is low intensity magnetic separation concentrate, and mine tailing is high intensity magnetic separation mine tailing, and chats is high intensity magnetic separation chats and low intensity magnetic separation mine tailing.
From above-mentioned testing result:
1) final concentrate improves cobalt grade 7.83 times relative to flotation tailing, improves copper grade 1.37 times relative to high intensity magnetic separation concentrate; The selected rate of recovery 88.7% of cobalt.
2) low intensity magnetic separation mine tailing throws the iron removing in high intensity magnetic separation concentrate 51.4%.
Claims (5)
1. improve a beneficiation method for copper cobalt magnetic concentrate grade, it is characterized in that: comprise the steps:
(1) copper-cobalt oxidation ore flotation tailing is milled to-0.074mm and accounts for 70-90%, be made into the ore pulp that concentration is 10-40%, carry out strong magnetic with 0.8-1.2T background lectromagnetism field high gradient magnetic separator to roughly select, obtain strong magnetic rougher concentration and strong magnetic rougher tailings, strong magnetic rougher tailings is final magnetic tailing, it is selected that strong magnetic rougher concentration carries out strong magnetic with 0.8-1.2T background lectromagnetism field high gradient magnetic separator again, and obtain the selected concentrate of strong magnetic and strong magnetic cleaner tailings, strong magnetic cleaner tailings is final magnetic middling ore;
(2) the selected concentrate of above-mentioned strong magnetic is milled to-0.037mm and accounts for 50-80%, be made into the ore pulp that concentration is 10-40%, low intensity magnetic separation is carried out with 0.08-0.15T background lectromagnetism field high gradient magnetic separator, obtain low intensity magnetic separation concentrate and low intensity magnetic separation mine tailing, low intensity magnetic separation concentrate is final magnetic concentrate, and low intensity magnetic separation mine tailing is final magnetic middling ore.
2. a kind of beneficiation method improving copper cobalt magnetic concentrate grade according to claim 1, is characterized in that: carry out strong magnetic with 1.2T background lectromagnetism field high gradient magnetic separator in step (1) and roughly select with strong magnetic selected.
3. a kind of beneficiation method improving copper cobalt magnetic concentrate grade according to claim 1, it is characterized in that: step (2) first carries out magnetic detection with low field intensity high gradient magnetic separator to the varigrained selected concentrate of strong magnetic of regrinding, determine the separation of target minreal and magnetic impurity, thus determine the grinding particle size of the selected concentrate of strong magnetic.
4. a kind of beneficiation method improving copper cobalt magnetic concentrate grade according to claim 3, is characterized in that: in step (2), selected for strong magnetic concentrate is milled to-0.037mm and accounts for 65%, is made into the ore pulp that concentration is 20%.
5. a kind of beneficiation method improving copper cobalt magnetic concentrate grade as claimed in any of claims 1 to 4, is characterized in that: carry out low intensity magnetic separation with 0.1T background lectromagnetism field high gradient magnetic separator in step (2).
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103457A (en) * | 1985-05-10 | 1986-11-05 | 地质矿产部矿产综合利用研究所 | Magnetic agglomeration gravity separation method and separator thereof |
| US4663279A (en) * | 1984-03-21 | 1987-05-05 | Sumitomo Metal Mining Company Limited | Method of beneficiation of complex sulfide ores |
| JPH0487648A (en) * | 1990-07-27 | 1992-03-19 | Sumitomo Metal Mining Co Ltd | Method for refining molybdenum ore |
| CN1775368A (en) * | 2005-11-29 | 2006-05-24 | 武汉理工大学 | Cyclone suspension flash magnetized roasting-magnetic separating method for refractory ferric oxide ore |
| CN101293281A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Method for directly producing metallic iron powder with high-alumina iron ore |
| CN102000630A (en) * | 2010-12-13 | 2011-04-06 | 长沙有色冶金设计研究院 | Technology for preparing iron ore concentrate |
| CN103386359A (en) * | 2013-07-19 | 2013-11-13 | 广州有色金属研究院 | Beneficiation method for copper oxide cobalt ores |
| CN104258963A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Sorting technology for iron ore containing copper, cobalt and magnetite |
-
2015
- 2015-10-19 CN CN201510674249.5A patent/CN105381874B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663279A (en) * | 1984-03-21 | 1987-05-05 | Sumitomo Metal Mining Company Limited | Method of beneficiation of complex sulfide ores |
| CN85103457A (en) * | 1985-05-10 | 1986-11-05 | 地质矿产部矿产综合利用研究所 | Magnetic agglomeration gravity separation method and separator thereof |
| JPH0487648A (en) * | 1990-07-27 | 1992-03-19 | Sumitomo Metal Mining Co Ltd | Method for refining molybdenum ore |
| CN1775368A (en) * | 2005-11-29 | 2006-05-24 | 武汉理工大学 | Cyclone suspension flash magnetized roasting-magnetic separating method for refractory ferric oxide ore |
| CN101293281A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Method for directly producing metallic iron powder with high-alumina iron ore |
| CN102000630A (en) * | 2010-12-13 | 2011-04-06 | 长沙有色冶金设计研究院 | Technology for preparing iron ore concentrate |
| CN103386359A (en) * | 2013-07-19 | 2013-11-13 | 广州有色金属研究院 | Beneficiation method for copper oxide cobalt ores |
| CN104258963A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Sorting technology for iron ore containing copper, cobalt and magnetite |
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