CN107583764B - Beneficiation method for recovering mica from copper ore tailings - Google Patents

Beneficiation method for recovering mica from copper ore tailings Download PDF

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CN107583764B
CN107583764B CN201711036120.7A CN201711036120A CN107583764B CN 107583764 B CN107583764 B CN 107583764B CN 201711036120 A CN201711036120 A CN 201711036120A CN 107583764 B CN107583764 B CN 107583764B
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mica
magnetic
magnetic separation
magnetic separator
tailing
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CN107583764A (en
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毛益林
周家云
廖祥文
杨进忠
陈晓青
严伟平
王秀芬
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Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological Sciences
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Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological Sciences
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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

A kind of beneficiation method of copper mining tailing recycling mica
Technical field
The invention belongs to ore dressing recovery technology fields, and in particular to a kind of beneficiation method of copper mining tailing recycling mica.
Background technique
With the continuous development of China's economy, mineral resources are largely developed, and resource is increasingly exhausted.As secondary Shortage of resources can be not only effectively relieved in the recycling of useful constituent in the tailing of resource, improve the level of resources utilization, can also subtract Few tailings impoundment area mitigates heavy metal ion in tailing to the pollution of environment and avoids the disasters such as come down, collapse to greatest extent Generation.Mica is using wide nonmetallic aluminium silicate mineral, in material industry, chemical industry, coatings industry, makeup It is widely applied in the industries such as product.All contain a large amount of mica resources in most metamorphic rock Mine Tailings, there are tailings for most heap Without being recycled in library.
Mica recycling at present is mainly floatation process, uses " gravity treatment-flotation ", " magnetic separation-flotation " etc. with floating on a small quantity It is selected as main process integration, and there are mainly two types of floatation process: one is under the conditions of acid ore pulp (pH2~4), with cation Collecting agent floatation on mica, this method easily cause to corrode since pH values of pulp is lower to pipeline and equipment, therefore corrode to the resistance to strong acid of equipment It is more demanding;Another kind is under the conditions of neutral or alkalescent ore pulp, and with anionic collector floatation on mica, this method is to equipment It is of 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 does not meet the national policy requirements in relation to environmental protection and energy-saving and emission-reduction.
Publication No. CN105268539, publication date are that the Chinese patent literature on January 27th, 2016 discloses a kind of recycling The ore-dressing technique of graphite and mica in graphite tailing, 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 to obtain mica essence Mine.It is somebody's turn to do the Armco magnetic iron mineral that the process is more complicated, contains in magnetic separation process mainly removing tailing, the recycling of mica and purification master It to be realized by the subsequent floatation process for needing to add a large amount of chemical agents.
Publication No. CN105251606, publication date are that the Chinese patent literature on January 20th, 2016 discloses a kind of tantalum niobium The refining technique of lepidolite in mine 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 remove iron, high-gradient magnetic separation, Dense medium separation, flotation obtain lepidolite concentrate.The process flow is complicated, main to remove iron-bearing mineral by magnetic separation, is added big It measures tetrabromoethane and carries out heavy-fluid separation raising mica mineral grade, lepidolite is refined finally by floatation process.
Summary of the invention
In view of the shortcomings of the prior art, the purpose of the present invention is to provide a kind of ore dressing sides of copper mining tailing recycling mica Method, this method comprises the following steps:
(1) copper mining tailing is milled to -0.075mm content is 70~90%;
(2) under the magnetic field strength of 0.1~0.2T, magnetic separation is carried out to step (1) gains, obtains inferior fine magnetite concentrate and weak magnetic Tailing;
(3) under the magnetic field strength of 0.8~1.4T, magnetic separation is carried out to weakly magnetic tailings 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, when gravity treatment, first carries out roughing, obtain rougher concentration, roughing chats and Rougher tailings, when being scanned, being selected in raw material is roughing chats, obtains scavenger concentrate and scans tailing, merge rougher concentration with Scavenger concentrate obtains gravity treatment mica concentrate.
It will be apparent to those skilled in the art that ore-dressing technique of the invention is only made of different physical upgrading technique. Due to the problem of only with physical upgrading technique, the invention avoids the pollution of chemical agent bring and higher costs, to make Of the invention must have the advantages that low equipment investment, flowage structure are simple, beneficiation cost is cheap.
When being recycled generally, for the mica of milltailings, the content of mica is not answered 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% Above mica concentrate.
During the magnetic separation of step (2), scum is mainly contained in resulting inferior fine magnetite concentrate, and mica is enriched in weak magnetic tail In mine.By the step for, selected convenient for mica in subsequent step.
After step (3), gained high intensity magnetic mineral is classified by the present invention, then using the coarse fraction after classification as Subsequent gravity treatment is selected in raw material, then by gravity treatment, can efficiently obtain the excellent mica concentrate of grade.
Several steps of the invention, are successively utilized ore grinding, low intensity magnetic separation, high intensity magnetic separation, classification and gravity treatment, so that one step of mica 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 not can avoid the combination with the floatation process of addition chemical agent, so that production cost and ring can not be solved The excessively high problem of border processing cost.Meanwhile the magnetic separation process of the prior art is by the mica mineral of weak magnetic and ferromagnetic iron Minerals separation, and magnetic separation process of the invention be the mica mineral of weak magnetic is separated 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, into 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 Technical effect.It is understood that since the present invention is without adding any chemical agent, therefore the water after concentrate, tailing filtration And flushing water etc. all can be used as return water return and recycle, and will not generate secondary pollution to environment.
It,, can when ore grinding in step (1) as the optional scheme of the present invention on the basis of knowing the principle of aforementioned present invention To be carried out using including at least one of autogenous tumbling mill, semi-autogenous mill, rod mill, ball mill equipment.
Under normal circumstances, 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), using wet type weak magnetic separator when carrying out the magnetic separation, the wet type weak magnetic separator includes permanent magnetism One of formula weak magnetic separator, wet type electromagnetic formula weak magnetic separator or plurality of devices combination.
In step (3), using Wet-type strong magnetic separator when carrying out the magnetic separation, the Wet-type strong magnetic separator includes flat ring One of formula intensity magnetic separator, vertical ring type intensity magnetic separator, flat ring formula High gradient high intensity magnetic separator, vertical ring type High gradient high intensity magnetic separator or Plurality of devices combination.
In step (4), when carrying out the classification, using including one of hydrocyclone, high frequency shale shaker or a variety of Equipment combination carries out.
In step (5), when carrying out the gravity treatment, using one of shaking table, cyclone for including industrial type or a variety of Equipment carries out.
Beneficial effects of the present invention:
The present invention is not necessarily to chemical agent, and the mica concentrate of fine quality is just obtained only with the method for physical upgrading, drops Low operating cost, avoids environmental pollution;For the resulting mica concentrate content of the present invention up to 77% or more, the mica rate of recovery can Up to 40% or more.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that following embodiment is only used It is further detailed in the present invention, should not be understood as limiting the scope of the invention, which 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 grade 3.21%, mica content 13.25% nominal group process be original Material carries out following steps, such as Fig. 1 using technology of the invention:
(1) ore grinding: copper mining tailing is added in ball mill and carries out closed circuit grinding operation, raw ore is milled to -0.075mm content 79.4%;
(2) low intensity magnetic separation: low intensity magnetic separation, magnetic field strength will be carried out by wet type permanent magnet formula weak magnetic separator by the sample ore of ore grinding 0.14T, ore pulp mass concentration 45%.Low intensity magnetic separation obtains inferior fine magnetite concentrate (scum) and weakly magnetic tailings, using the weakly magnetic tailings as The selected raw material of further high intensity magnetic separation mica;
(3) high intensity magnetic separation: logical by raw material of low intensity magnetic separation tailing
It crosses vertical ring type High gradient high intensity magnetic separator and carries out high intensity magnetic separation, magnetic field strength 1.0T, ore pulp mass concentration 40%.High intensity magnetic separation Obtain the high intensity magnetic separation concentrate and nonmagnetic high intensity magnetic separation tailing of weak magnetic, wherein high intensity magnetic separation 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 being 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: the coarse fraction product after classification being added in slimer and carries out gravity treatment roughing, 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 tailing;Roughing chats is added in slimer simultaneously and be scanned, output scavenger concentrate and scans tailing.Wherein, roughing Concentrate and scavenger concentrate merge into gravity treatment mica concentrate, rougher tailings with to scan be true tailings after tailing merges.
Finally obtain K2O content 8.67%, mica content 79.45%, the mica rate of recovery 41.8% high-quality mica concentrate.
Embodiment 2
With domestic certain Large-scale Copper Mines Tailings Dam K2O grade 2.54%, mica content 12.87% nominal group process be original Material carries out following steps, such as Fig. 1 using technology of the invention:
(1) ore grinding: copper mining tailing is added in rod mill and carries out closed circuit grinding operation, raw ore is milled to -0.075mm content 84.7%;
(2) low intensity magnetic separation: low intensity magnetic separation, magnetic field strength will be carried out by wet type electromagnetic formula weak magnetic separator by the sample ore of ore grinding 0.10T, ore pulp mass concentration 40%.Low intensity magnetic separation obtains inferior fine magnetite concentrate (scum) and weakly magnetic tailings, using the weakly magnetic tailings 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 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 and nonmagnetic high intensity magnetic separation tailing of weak magnetic, In, high intensity magnetic separation 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 being 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: the coarse fraction product after classification being added in slimer and carries out gravity treatment roughing, output rougher concentration, Three roughing chats, rougher tailings products;Simultaneously will roughing chats be added slimer in scan, output scavenger concentrate with Scan tailing.Wherein, rougher concentration and scavenger concentrate merge into gravity treatment mica concentrate, and rougher tailings is with scanning after tailing merges True tailings.
Finally obtain K2O content 8.23%, mica content 77.32%, the high-quality mica of the mica rate of recovery 47.35% are smart Mine.

Claims (7)

1. a kind of beneficiation method of copper mining tailing recycling mica, which is characterized in that described method includes following steps:
(1) copper mining tailing is milled to -0.075mm content is 70~90%;
(2) under the magnetic field strength of 0.1~0.2T, magnetic separation is carried out to step (1) gains, obtains inferior fine magnetite concentrate and weak magnetic tail Mine;
(3) under the magnetic field strength of 0.8~1.4T, magnetic separation is carried out to weakly magnetic tailings obtained by step (2), obtains high intensity magnetic mineral and non- Magnetic 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 takes coarse fraction therein;
(5) gravity treatment is carried out to step (4) gains, when gravity treatment, first carries out roughing, obtains rougher concentration, roughing chats and roughing Tailing, when being scanned, being selected in raw material is roughing chats, obtains scavenger concentrate and scans tailing, merges rougher concentration and scan Concentrate obtains gravity treatment mica concentrate.
2. beneficiation method according to claim 1, which is characterized in that in step (1), when ore grinding, using include autogenous tumbling mill, At least one of semi-autogenous mill, rod mill, ball mill equipment carries out.
3. beneficiation method according to claim 1, which is characterized 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, which is characterized in that in step (2), when carrying out the magnetic separation using Wet type weak magnetic separator, the wet type weak magnetic separator include one of magneto weak magnetic separator, wet type electromagnetic formula weak magnetic separator or Plurality of devices combination.
5. beneficiation method according to claim 1, which is characterized in that in step (3), when carrying out the magnetic separation using Wet-type strong magnetic separator, the Wet-type strong magnetic separator include that flat ring formula intensity magnetic separator, vertical ring type intensity magnetic separator, flat ring formula high gradient are strong One of magnetic separator, vertical ring type High gradient high intensity magnetic separator or plurality of devices combination.
6. beneficiation method according to claim 1, which is characterized in that in step (4), when carrying out the classification, using packet It includes one of hydrocyclone, high frequency shale shaker or plurality of devices combination carries out.
7. beneficiation method according to claim 1, which is characterized in that in step (5), when carrying out the gravity treatment, using packet It includes one of shaking table, cyclone of industrial type or plurality of devices carries out.
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CN109174442B (en) * 2018-08-10 2021-03-30 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
CN111644265B (en) * 2020-05-11 2021-11-26 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
CN113102093B (en) * 2021-04-21 2023-07-04 中国地质科学院郑州矿产综合利用研究所 Efficient multi-component phosphorite resource utilization method

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