CN107583764A - Beneficiation method for recovering mica from copper ore tailings - Google Patents
Beneficiation method for recovering mica from copper ore tailings Download PDFInfo
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- CN107583764A CN107583764A CN201711036120.7A CN201711036120A CN107583764A CN 107583764 A CN107583764 A CN 107583764A CN 201711036120 A CN201711036120 A CN 201711036120A CN 107583764 A CN107583764 A CN 107583764A
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Abstract
The invention discloses a beneficiation method for recovering mica from copper ore tailings, which comprises the steps of ore grinding, low-intensity magnetic separation, high-intensity magnetic separation, classification and gravity separation. The invention recovers the weak magnetic mica minerals in the copper mine tailings by a strong magnetic separation process, and purifies and refines the minerals by a re-selection process after grading to obtain better mica concentrate products. The process flow of the invention has simple structure, and has the advantages of low equipment investment and low mineral dressing cost; the invention avoids the flotation process adopted in the conventional mica mineral separation and recovery, does not need to add any chemical agent, and does not produce secondary pollution to the environment.
Description
Technical field
The invention belongs to ore dressing recovery technology field, and in particular to a kind of beneficiation method of copper mining tailing recovery mica.
Background technology
With the continuous development of China's economy, mineral resources are largely developed, and resource is increasingly exhausted.As secondary
The recycling of useful constituent not only can effectively alleviate shortage of resources in the mine tailing of resource, improve the level of resources utilization, can also subtract
Few tailings impoundment area, mitigate pollution to environment of heavy metal ion in mine tailing and avoiding to greatest extent and the disaster such as come down, collapse
Generation.Mica is to apply wide nonmetallic aluminium silicate mineral, in material industry, chemical industry, coatings industry, cosmetic
Extensive use in the industries such as product.All contain a large amount of mica resources in most metamorphic rock Mine Tailings, most heap has mine tailing
Utilized in storehouse without being recycled.
Mica recovery at present is mainly floatation process, uses " gravity treatment-flotation ", " magnetic separation-flotation " etc. on a small quantity with floating
Elect main process integration as, and floatation process mainly has two kinds：One kind is under the conditions of acid ore pulp (pH2~4), uses cation
Collecting agent floatation on mica, this method easily are caused to corrode because pH values of pulp is relatively low to pipeline and equipment, therefore the resistance to strong acid of equipment is corroded
It is it is required that higher；Another kind is that, with anionic collector floatation on mica, this method is to equipment under the conditions of neutral or alkalescent ore pulp
It is less demanding, but mica concentrate product quality and the rate of recovery are not as good as acid flotation of ore pulp method.Meanwhile two kinds of floatation process make
With a large amount of chemical agents, production cost is higher, and flotation bad environments, and environmental pollution is serious, and safety and environmental protection are extremely difficult to
Relevant national standard, the national policy requirements about environmental protection and energy-saving and emission-reduction are not met.
Publication No. CN105268539, publication date disclose a kind of recovery for the Chinese patent literature on January 27th, 2016
The ore-dressing technique of graphite and mica in graphite tailing, it is mainly on the basis of diffeential floatation graphite, to graphite flotation tailing
Gravity treatment is carried out, and magnetic separation is carried out to gravity treatment product sand setting, the non magnetic ore of acquisition carries out mica flotation so as to obtain mica essence
Ore deposit.The technique is complex, and magnetic separation process is mainly the Armco magnetic iron mineral for removing and containing in mine tailing, the recovery of mica and purification master
To be realized by the floatation process for subsequently needing to add a large amount of chemical agents.
Publication No. CN105251606, publication date disclose a kind of tantalum niobium for the Chinese patent literature on January 20th, 2016
The refining technique of lepidolite in ore deposit barren rock, with the process integration side of " magnetic separation+high-gradient magnetic separation+dense medium separation+flotation "
Method, by tantalum niobium concentrate barren rock by broken, screening, ore grinding, high frequency screening, screw classifying, permanent-magnet concentration iron removaling, high-gradient magnetic separation,
Dense medium separation, flotation obtain lepidolite concentrate.The technological process is complicated, mainly removes iron-bearing mineral by magnetic separation, adds big
Measure tetrabromoethane and carry out heavy-fluid separation raising mica mineral grade, lepidolite is refined finally by floatation process.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of ore dressing side of copper mining tailing recovery mica
Method, this method comprise the following steps：
(1) copper mining tailing is milled to -0.075mm contents as 70~90%；
(2) under 0.1~0.2T magnetic field intensity, magnetic separation is carried out to step (1) gains, obtains inferior fine magnetite concentrate and weak magnetic
Mine tailing；
(3) under 0.8~1.4T magnetic field intensity, magnetic separation is carried out to weakly magnetic tailingses obtained by step (2), obtains high intensity magnetic mineral
And nonmagnetic tailings；
(4) high intensity magnetic mineral obtained by step (3) is classified, is divided into+0.051~0.075mm, -0.051~0.075mm
Two ranks, take coarse fraction therein；
(5) gravity treatment is carried out to step (4) gains, during gravity treatment, first carries out roughing, obtain rougher concentration, roughing chats and
Rougher tailings, when being scanned, it be roughing chats to be selected in raw material, obtains scavenger concentrate and scans mine tailing, merge rougher concentration and
Scavenger concentrate, obtain gravity treatment mica concentrate.
It will be apparent to those skilled in the art that the ore-dressing technique of the present invention is only made up of different physical upgrading technique.
Due to only with physical upgrading technique, the problem of the pollution brought present invention, avoiding chemical agent and higher cost, so that
Of the invention there must be the advantages of low equipment investment, flowage structure is simple, beneficiation cost is cheap.
When being reclaimed generally, for the mica of milltailings, the content of mica should not be too low.The present invention, which uses, to be divided
Stages of magnetic separation, and the technique of classification and gravity treatment is combined, ore dressing can be carried out to the mica in copper mining tailing, obtain content up to 77%
Mica concentrate above.
During the magnetic separation of step (2), scum is mainly contained in the inferior fine magnetite concentrate of gained, and mica is enriched in weak magnetic tail
In ore deposit.By the step for, be easy to selecting for mica in subsequent step.
After step (3), the present invention gained high intensity magnetic mineral is classified, then using the coarse fraction after classification as
Follow-up gravity treatment is selected in raw material, can be efficiently to obtain the excellent mica concentrate of grade then by gravity treatment.
Several steps of the present invention, successively make use of ore grinding, low intensity magnetic separation, high intensity magnetic separation, classification and gravity treatment so that the step of mica one
Being enriched with for step, ultimately forms the excellent mica concentrate of grade.Although in the prior art, magnetic separation and gravity treatment are also commonly used for cloud
Female selects, but can not avoid and add the combination of the floatation process of chemical agent, so as to solve production cost and ring
The problem of border processing cost is too high.Meanwhile the magnetic separation process of prior art is by the mica mineral of weak magnetic and ferromagnetic iron
Minerals separation, and the magnetic separation process of the present invention is to separate the mica mineral of weak magnetic with nonmagnetic gangue mineral, though use
Same technique, but principle is totally different.The present invention is constantly groped by the concrete technology to magnetic separation, and is proposed before gravity treatment, is entered
Row as present invention provide that classification processing, realize and just obtain the excellent mica concentrate of grade only by the method for physical upgrading
Technique effect.It is understood that because the present invention need not add any chemical agent, therefore the water after concentrate, tailing filtration
And flushing water etc. all can be used as backwater return to recycle, secondary pollution will not be produced to environment.
,, can during ore grinding in step (1) as the optional scheme of the present invention on the basis of knowing the principle of the invention described above
Include the progress of at least one of autogenous tumbling mill, semi-autogenous mill, rod mill, ball mill equipment to use.
Generally, magnetic separation is convenient for work, in step (2) and/or step (3), when carrying out the magnetic separation, ore pulp
Mass percentage concentration is 25~50%.
In step (2), include permanent magnetism using wet type weak magnetic separator, the wet type weak magnetic separator when carrying out the magnetic separation
One or more equipment combination in formula weak magnetic separator, wet type electromagnetic formula weak magnetic separator.
In step (3), include flat ring using Wet-type strong magnetic separator, the Wet-type strong magnetic separator when carrying out the magnetic separation
Formula intensity magnetic separator, vertical ring type intensity magnetic separator, flat ring formula High gradient high intensity magnetic separator, one kind in vertical ring type High gradient high intensity magnetic separator or
Plurality of devices combines.
In step (4), when carrying out the classification, using including the one or more in hydrocyclone, high frequency shale shaker
Equipment combination is carried out.
In step (5), when carrying out the gravity treatment, using the one or more in the shaking table including industrial type, cyclone
Equipment is carried out.
Beneficial effects of the present invention：
The present invention just obtains the mica concentrate of fine quality only with the method for physical upgrading, dropped without chemical agent
Low operating cost, avoids environmental pollution；For the mica concentrate content of gained of the invention up to more than 77%, the mica rate of recovery can
Up to more than 40%.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Embodiment
The present invention is specifically described below by embodiment, it is necessary to it is pointed out here that be following examples simply use
It is further detailed in the present invention, it is impossible to be interpreted as limiting the scope of the invention, the field is skilled in technique
Some nonessential modifications and adaptations that personnel are made according to foregoing invention content, still fall within protection scope of the present invention.
Embodiment 1
With domestic certain Large-scale Copper Mines Tailings Dam K2O grades 3.21%, the nominal group process of mica content 13.25% are original
Material, using the technology of the present invention, carry out following steps, such as Fig. 1：
(1) ore grinding：Copper mining tailing is added closed circuit grinding operation is carried out in ball mill, raw ore is milled to -0.075mm contents
79.4%；
(2) low intensity magnetic separation：By the sample ore of ore grinding low intensity magnetic separation, magnetic field intensity will be carried out by wet type permanent magnet formula weak magnetic separator
0.14T, ore pulp mass concentration 45%.Low intensity magnetic separation obtains inferior fine magnetite concentrate (scum) and weakly magnetic tailingses, using the weakly magnetic tailingses as
The selected raw material of further high intensity magnetic separation mica；
(3) high intensity magnetic separation：Lead to using low intensity magnetic separation mine tailing as raw material
Cross vertical ring type High gradient high intensity magnetic separator and carry out high intensity magnetic separation, magnetic field intensity 1.0T, ore pulp mass concentration 40%.High intensity magnetic separation
The high intensity magnetic separation concentrate of weak magnetic and nonmagnetic high intensity magnetic separation mine tailing are obtained, wherein, high intensity magnetic separation mine tailing is true tailings, containing a large amount of
Selected raw material of the high intensity magnetic separation concentrate of mica mineral as next step grading technology；
(4) it is classified：High intensity magnetic separation concentrate is classified using hydrocyclone, is divided into+0.051mm, -0.051mm two
Rank.Wherein fine fraction product is true tailings, and coarse fraction product enters next step reselection operation.
(5) gravity treatment：Coarse fraction product after classification is added gravity treatment roughing is carried out in slimer, output rougher concentration,
Three roughing chats, rougher tailings products.Wherein, weight product is rougher concentration, and secondary heavy product is roughing chats, and light product is thick
Select mine tailing；Roughing chats is added in slimer simultaneously and scanned, output scavenger concentrate is with scanning mine tailing.Wherein, roughing
Concentrate merges into gravity treatment mica concentrate with scavenger concentrate, and rougher tailings is true tailings with scanning after mine tailing merges.
Finally give K2O content 8.67%, mica content 79.45%, the high-quality mica concentrate of the mica rate of recovery 41.8%.
Embodiment 2
With domestic certain Large-scale Copper Mines Tailings Dam K2O grades 2.54%, the nominal group process of mica content 12.87% are original
Material, using the technology of the present invention, carry out following steps, such as Fig. 1：
(1) ore grinding：Copper mining tailing is added closed circuit grinding operation is carried out in rod mill, raw ore is milled to -0.075mm contents
84.7%；
(2) low intensity magnetic separation：By the sample ore of ore grinding low intensity magnetic separation, magnetic field intensity will be carried out by wet type electromagnetic formula weak magnetic separator
0.10T, ore pulp mass concentration 40%.Low intensity magnetic separation obtains inferior fine magnetite concentrate (scum) and weakly magnetic tailingses, using the weakly magnetic tailingses as
The selected raw material of further high intensity magnetic separation mica；
(3) high intensity magnetic separation：High intensity magnetic separation is carried out by flat ring formula High gradient high intensity magnetic separator using low intensity magnetic separation mine tailing as raw material, magnetic field is strong
Spend 1.2T, ore pulp mass concentration 35%.High intensity magnetic separation obtains the high intensity magnetic separation concentrate of weak magnetic and nonmagnetic high intensity magnetic separation mine tailing, its
In, high intensity magnetic separation mine tailing is true tailings, contains the high intensity magnetic separation concentrate of a large amount of mica minerals as the selected of next step grading technology
Raw material；
(4) it is classified：High intensity magnetic separation concentrate is classified using high frequency shale shaker, is divided into+0.075mm, -0.075mm two
Rank.Wherein fine fraction product is true tailings, and coarse fraction product enters next step reselection operation.
(5) gravity treatment：Coarse fraction product after classification is added gravity treatment roughing is carried out in slimer, output rougher concentration,
Three roughing chats, rougher tailings products；Simultaneously will roughing chats add slimer in be scanned, output scavenger concentrate with
Scan mine tailing.Wherein, rougher concentration merges into gravity treatment mica concentrate with scavenger concentrate, and rougher tailings is with scanning after mine tailing merges
True tailings.
Finally give K2O content 8.23%, mica content 77.32%, the high-quality mica essence of the mica rate of recovery 47.35%
Ore deposit.
Claims (7)
1. a kind of beneficiation method of copper mining tailing recovery mica, it is characterised in that methods described comprises the following steps：
(1) copper mining tailing is milled to -0.075mm contents as 70~90%；
(2) under 0.1~0.2T magnetic field intensity, magnetic separation is carried out to step (1) gains, obtains inferior fine magnetite concentrate and weak magnetic tail
Ore deposit；
(3) under 0.8~1.4T magnetic field intensity, magnetic separation is carried out to weakly magnetic tailingses obtained by step (2), obtains high intensity magnetic mineral and non-
Magnetic mine tailing；
(4) high intensity magnetic mineral obtained by step (3) is classified, is divided into+0.051~0.075mm, -0.051~0.075mm two
Rank, take coarse fraction therein；
(5) gravity treatment is carried out to step (4) gains, during gravity treatment, first carries out roughing, obtain rougher concentration, roughing chats and roughing
Mine tailing, when being scanned, it is roughing chats to be selected in raw material, obtains scavenger concentrate and scans mine tailing, merges rougher concentration with scanning
Concentrate, obtain gravity treatment mica concentrate.
2. beneficiation method according to claim 1, it is characterised in that in step (1), during ore grinding, using including autogenous tumbling mill,
At least one of semi-autogenous mill, rod mill, ball mill equipment is carried out.
3. beneficiation method according to claim 1, it is characterised in that in step (2) and/or step (3), carry out the magnetic
When selecting, ore pulp mass percentage concentration is 25~50%.
4. beneficiation method according to claim 1, it is characterised in that in step (2), when carrying out the magnetic separation using
Wet type weak magnetic separator, the wet type weak magnetic separator include magneto weak magnetic separator, one kind in wet type electromagnetic formula weak magnetic separator or
Plurality of devices combines.
5. beneficiation method according to claim 1, it is characterised in that in step (3), when carrying out the magnetic separation using
Wet-type strong magnetic separator, it is strong that the Wet-type strong magnetic separator includes flat ring formula intensity magnetic separator, vertical ring type intensity magnetic separator, flat ring formula high gradient
One or more equipment combination in magnetic separator, vertical ring type High gradient high intensity magnetic separator.
6. beneficiation method according to claim 1, it is characterised in that in step (4), when carrying out the classification, using bag
The one or more equipment combination included in hydrocyclone, high frequency shale shaker is carried out.
7. beneficiation method according to claim 1, it is characterised in that in step (5), when carrying out the gravity treatment, using bag
The one or more equipment included in the shaking table of industrial type, cyclone are carried out.
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Cited By (6)
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| CN109174442A (en) * | 2018-08-10 | 2019-01-11 | 中国地质科学院矿产综合利用研究所 | Physical beneficiation removal method for heavy metals in copper tailings |
| CN110813517A (en) * | 2019-11-08 | 2020-02-21 | 长春黄金研究院有限公司 | Beneficiation method for recycling wolframite from tailings |
| CN111346740A (en) * | 2020-03-13 | 2020-06-30 | 江西理工大学 | Process for recycling lepidolite from tantalum-niobium tailings |
| CN111644265A (en) * | 2020-05-11 | 2020-09-11 | 金建工程设计有限公司 | Process for recycling sericite from gold tailings |
| CN112317124A (en) * | 2020-10-22 | 2021-02-05 | 崇义章源钨业股份有限公司 | Method for recovering copper and mica minerals from tungsten-dressing tailings |
| CN113102093A (en) * | 2021-04-21 | 2021-07-13 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency utilization method of multi-component phosphorite resource |
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| CN111644265A (en) * | 2020-05-11 | 2020-09-11 | 金建工程设计有限公司 | Process for recycling sericite from gold tailings |
| CN112317124A (en) * | 2020-10-22 | 2021-02-05 | 崇义章源钨业股份有限公司 | Method for recovering copper and mica minerals from tungsten-dressing tailings |
| CN113102093A (en) * | 2021-04-21 | 2021-07-13 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency utilization method of multi-component phosphorite resource |
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