CN114453134A - Method for recycling lepidolite ore - Google Patents
Method for recycling lepidolite ore Download PDFInfo
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- CN114453134A CN114453134A CN202210104048.1A CN202210104048A CN114453134A CN 114453134 A CN114453134 A CN 114453134A CN 202210104048 A CN202210104048 A CN 202210104048A CN 114453134 A CN114453134 A CN 114453134A
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- lepidolite
- magnetic
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- iron
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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
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
Abstract
The invention discloses a method for recovering lepidolite ore, which comprises the following steps: s1, adding the raw material of the iron-lithium-iron-mica ore into a ball mill for ball milling; s2, performing primary screening on the raw materials subjected to ball milling in the step S1, wherein the mesh diameter of the primary screening is 0.8mm, and obtaining screened powder and unscreened powder; s3, removing iron from the sieved powder obtained in the step S2 through weak magnetism, and recovering magnetic substances through strong magnetism to obtain nonmagnetic substances and magnetic substances; the invention simplifies the flow and reduces the operation cost. The grinding and recleaning technology after the lepidolite concentrate is graded better meets the requirement of smelting on the fineness of the lepidolite, the lithium resource is efficiently recycled, and the comprehensive benefit is increased.
Description
Technical Field
The invention relates to the technical field of ore grinding, in particular to a method for recovering lepidolite ore.
Background
Lithium is a very important basic raw material for the new energy industry. The lithium resource is mainly from spodumene ore and lepidolite ore, and the mining grade is generally 0.5 percent of lithium. For the lepidolite ore, the lepidolite ore exists mostly in the form of associated resources and is widely present in tantalum-niobium ore bodies. Lepidolite has a fatal defect that it is flaky and is difficult to be finely ground.
The lepidolite is the most common lithium mineral and is an important mineral for extracting lithium. It is a potassium and lithium based aluminosilicate mineral, which belongs to one of mica minerals. Lepidolite is generally produced only in granite pegmatite, is purple and pink in color, can be light to colorless, and has pearl luster. Lithium is the lightest metal. At present, the lepidolite is used as a raw material to smelt the lithium carbonate, the consumption of the lepidolite is large, particularly, the rapid development of new energy industry increases the demand on lithium resources increasingly, the development of lithium resource recovery is accelerated, and in the existing mineral separation technology of the lepidolite, the phenomenon of grinding and argillization exists, the recovery rate of lithium oxide is not high, and the recovery rate is generally 65-70%.
In order to improve the beneficiation effect of the lepidolite, a plurality of patents are based on flotation reagents to solve the problem of the flotation process. Patent application No. 201710322482.6 discloses a lepidolite flotation method. Crushing raw ore, and performing wet steel ball milling to obtain ore pulp; using laurylamine polyoxyethylene ether solution as a collecting agent and sulfuric acid as a regulator to perform flotation separation on ore pulp after ore grinding to obtain the ore pulp containing Li2The O grade is 3.17%, and the recovery rate is 66.38%. Application number 201310163993.X discloses a novel lepidolite flotation method which comprises primary roughing, secondary fine separation and secondary scavenging. The inhibitor added during the flotation is water glass, the dosage of the inhibitor is 1400-1900 g/t, the anionic collector is sodium oleate or oxidized paraffin soap 731, the dosage of the anionic collector is 480-700 g/t, and the anionic collector is lauryl amine or coco amine
130-160 g/t. Patent application No. 201510788440.2 discloses a beneficiation inhibitor for lepidolite flotation process. And (3) using a beneficiation inhibitor compounded by sodium silicate, sodium phosphate and carboxymethyl cellulose to float the lepidolite concentrate from the tantalum-niobium tailings. The beneficiation inhibitor comprises sodium silicate, sodium phosphate and carboxymethyl cellulose, and the proportion of the sodium silicate, the sodium phosphate and the carboxymethyl cellulose is 10-40: 10-40: 80-20. The collecting agent is coconut oil primary amine, and is mixed with hydrochloric acid according to the mass ratio of 1: 1-1: 5 to prepare an aqueous solution with the amine mass fraction of 0.5% -5% as a flotation reagent, and a beneficiation inhibitor is added, wherein the dosage of the beneficiation inhibitor is 50-1000 g/t. The solid content of the tantalum-niobium tailing slurry is 20% -30% in flotation, the pH value of the ore slurry is 5-9, and sodium carbonate is used for pH adjustment.
However, the above prior art all contain a flotation step.
Disclosure of Invention
The invention aims to provide a method for recovering lepidolite ore, which solves the problem of low recovery rate of the existing lithium oxide.
In order to solve the problems, the invention provides the following technical scheme:
a lepidolite ore recovery method comprises the following steps:
s1, adding the lepidolite raw material into a ball mill for ball milling;
s2, performing primary screening on the raw materials subjected to ball milling in the step S1, wherein the mesh diameter of the primary screening is 0.8mm, and obtaining screened powder and unscreened powder;
s3, removing iron from the sieved powder obtained in the step S2 through weak magnetism, recycling magnetic substances through strong magnetism to obtain nonmagnetic substances and magnetic substances, removing iron through weak magnetism by using 5000 gauss magnetic induction intensity, and recycling magnetic substances through 10000 gauss magnetic induction intensity;
s4, performing secondary screening on the magnetic substance obtained in the step S3, wherein the aperture of a screen of the secondary screening is 0.3mm, so as to obtain screened powder and unscreened powder, and performing pulsed high-gradient magnetic separation on the nonmagnetic substance obtained in the step S3 by using strong magnetism, so as to obtain tailings and magnetic substances;
and S5, recovering magnetic substances from the sieved powder obtained in the step S4 through strong magnetism, wherein the nonmagnetic substances are tailings, and the recovered magnetic substances are lepidolite concentrate.
Preferably, in the step S1,
s1, grinding the lepidolite raw material, adding the grinded lepidolite raw material into a ball mill for ball milling, wherein the ball mill is a dry ball mill.
Preferably, in the step S4,
and (4) carrying out pulsed high-gradient magnetic separation on the nonmagnetic substance obtained in the step (S3) by using strong magnetism to obtain tailings and magnetic substances.
Preferably, in the step S3:
and (3) carrying out weak magnetic iron removal by using 5000-gauss magnetic induction intensity, and recycling magnetic substances by using 10000-gauss magnetic induction intensity.
Preferably, the recovery method further comprises the steps of:
and S6, adding the raw materials which are not sieved in the first sieving and the second sieving into a ball mill for ball milling, and continuously recovering.
Preferably, the non-magnetic material remaining after the magnetic material is strongly recovered at step S5 is returned to step S1 to be recovered
Advantageous effects
According to the method for recycling the lepidolite, the lepidolite raw material is subjected to ball milling, the particle size is controlled, and then the lepidolite concentrate is finally obtained through rough concentration and scavenging. The ground ore screening product enters weak magnetism for deironing, and then enters a coarse scanning pulse high gradient magnetic separation for recycling iron lepidolite so as to achieve the aim of discarding the tail in advance. Before magnetic separation, desliming operation is not needed, the flow is simplified, and the operation cost is reduced. The grinding and recleaning technology after the lepidolite concentrate is graded better meets the requirement of smelting on the fineness of the lepidolite, the lithium resource is efficiently recycled, and the comprehensive benefit is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a lepidolite ore recovery method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Selecting 10 parts of a lepidolite raw material, wherein the content of lithium in the lepidolite raw material is 0.5 percent, and each part is 50kg, and each part is sequentially treated through the following steps.
S1, grinding the lepidolite raw material, adding the grinded lepidolite raw material into a ball mill for ball milling, wherein the ball mill is a dry ball mill.
S2, performing primary screening on the raw materials subjected to ball milling in the step S1, wherein the mesh diameter of the primary screening is 0.8mm, and obtaining screened powder and unscreened powder;
s3, removing iron from the sieved powder obtained in the step S2 by weak magnetism, and recovering magnetic substances by strong magnetism to obtain nonmagnetic substances and magnetic substances;
s4, performing secondary screening on the magnetic substance obtained in the step S3, wherein the aperture of a screen of the secondary screening is 0.3mm, and obtaining screened powder and unscreened powder;
and S5, recovering magnetic substances from the sieved powder obtained in the step S4 through strong magnetism, wherein the recovered magnetic substances are lepidolite concentrate.
And S6, adding the raw materials which are sieved for the first time and sieved for the second time and the non-magnetic substances which are left after the magnetic substances are recovered by the strong magnetism in the step S5 into a ball mill for ball milling, and continuously recovering.
The average recovery results of 10 parts of lepidolite raw material are shown in table 1 below
TABLE 1
| Name (R) | Yield% | Lithium oxide% | The recovery rate is high |
| Concentrate ore | 15.65 | 2.72 | 85.05 |
| Tailings | 84.35 | 0.09 | 14.95 |
| Raw ore | 100.00 | 0.50 | 100.00 |
Comparative example 1
Comparative example 1 the recovery was carried out by the conventional ball-milling flotation method, and 10 parts of a lepidolite raw material containing 0.5% lithium and 50kg each was selected.
The average recovery results of 10 parts of lepidolite raw material are shown in table 2 below
TABLE 2
| Name (R) | Yield% | Lithium oxide% | The recovery rate is high |
| Concentrate ore | 13.50 | 2.71 | 72.32 |
| Tailings | 86.50 | 0.16 | 27.68 |
| Raw ore | 100.00 | 0.50 | 100.00 |
As can be seen from the comparison between the table 2 and the table 1, the recovery rate of the lepidolite is higher through the method.
It can be seen from table 1 that the lepidolite is recovered by the method of the present application, the content of lithium oxide in tailings is only 0.09%, and the recovery rate of concentrate is 85.05% and far higher than the existing 65-70%, the conventional ball milling operation of step S1 is performed, but the proportion of powder with a particle size of less than 0.8mm is controlled to be more than 95% in step S2, then the weak magnetic rough separation is performed by a high gradient strong magnetic separator, the mass concentration of ore pulp is controlled to be 35-40%, the desliming operation is not required, the flow is simplified, the operation cost is reduced, the proportion of powder with a particle size of less than 0.3mm is controlled to be more than 95% by performing the second screening in step S3, the fineness requirement of lepidolite is met, and the raw materials which are screened for the first time and screened for the second time are added into the ball mill for ball milling in step S4, and then, the step S2 and the step S3 fully utilize the lepidolite raw material, so that waste is reduced.
In summary, the present application achieves an improvement in process, improves the recovery rate of lithium without using flotation, and simplifies the process and reduces the production cost.
It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The method for recovering the lepidolite iron ore is characterized by comprising the following steps of:
s1, adding the iron-lithium-iron-mica raw material into a ball mill for ball milling;
s2, performing primary screening on the raw materials subjected to ball milling in the step S1, wherein the mesh diameter of the primary screening is 0.8mm, and obtaining screened powder and unscreened powder;
s3, removing iron from the sieved powder obtained in the step S2 through weak magnetism, and recovering magnetic substances through strong magnetism to obtain nonmagnetic substances and magnetic substances;
s4, performing secondary screening on the magnetic substance obtained in the step S3, wherein the aperture of a screen of the secondary screening is 0.3mm, and obtaining screened powder and unscreened powder;
and S5, recovering magnetic substances from the sieved powder obtained in the step S4 through strong magnetism, wherein the recovered magnetic substances are lepidolite concentrate.
2. The recycling method according to claim 1, wherein, in the step S1,
s1, grinding the lepidolite raw material, adding the grinded lepidolite raw material into a ball mill for ball milling, wherein the ball mill is a dry ball mill.
3. The recycling method according to claim 1, wherein, in the step S4,
and (4) carrying out pulsed high-gradient magnetic separation on the nonmagnetic substance obtained in the step (S3) by using strong magnetism to obtain tailings and magnetic substances.
4. The recycling method according to claim 1, wherein in the step S3:
and (3) carrying out weak magnetic iron removal by using 5000-gauss magnetic induction intensity, and recycling magnetic substances by using 10000-gauss magnetic induction intensity.
5. A recycling method according to claim 1, characterized in that it further comprises the steps of:
and S6, adding the raw materials which are not sieved in the first sieving and the second sieving into a ball mill for ball milling, and continuously recovering.
6. The recycling method according to claim 1, wherein the step S5 of recovering the magnetic substance from the sieved powder obtained in the step S4 by strong magnetism further comprises:
the non-magnetic substance remaining after the magnetic substance is strongly recovered at step S5 is returned to step S1 to be recovered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210104048.1A CN114453134A (en) | 2022-01-28 | 2022-01-28 | Method for recycling lepidolite ore |
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| CN202210104048.1A CN114453134A (en) | 2022-01-28 | 2022-01-28 | Method for recycling lepidolite ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849898A (en) * | 2022-05-20 | 2022-08-05 | 山东晟锂环保科技有限公司 | Lithium iron separation application system for field-splitting magnetic separation on rough-separation particle lithium ore |
| CN114933309A (en) * | 2022-05-25 | 2022-08-23 | 江西博瑞新材料科技有限公司 | Method for extracting enriched lepidolite based on lithium ore pressed tail mud |
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| CN105251606A (en) * | 2014-12-29 | 2016-01-20 | 江西金辉环保科技有限公司 | Refining process for lepidolite in tantalum-niobium ore waste rocks |
| CN108057513A (en) * | 2017-12-20 | 2018-05-22 | 江西九岭新能源有限公司 | The method that the barren rock of giant granite containing lithium extracts potassium feldspar concentrate and zinnwaldite concentrate |
| CN111346740A (en) * | 2020-03-13 | 2020-06-30 | 江西理工大学 | Process for recycling lepidolite from tantalum-niobium tailings |
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2022
- 2022-01-28 CN CN202210104048.1A patent/CN114453134A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698871A (en) * | 2012-06-17 | 2012-10-03 | 鞍钢集团矿业公司 | Ore dressing technology for treating vanadium titano-magnetite |
| KR101243094B1 (en) * | 2012-08-09 | 2013-03-13 | 주식회사 미네월드 | Recovering method of high purity ash using bottom ash and fly ash |
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| CN111346740A (en) * | 2020-03-13 | 2020-06-30 | 江西理工大学 | Process for recycling lepidolite from tantalum-niobium tailings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849898A (en) * | 2022-05-20 | 2022-08-05 | 山东晟锂环保科技有限公司 | Lithium iron separation application system for field-splitting magnetic separation on rough-separation particle lithium ore |
| CN114933309A (en) * | 2022-05-25 | 2022-08-23 | 江西博瑞新材料科技有限公司 | Method for extracting enriched lepidolite based on lithium ore pressed tail mud |
| CN114933309B (en) * | 2022-05-25 | 2023-08-25 | 江西博瑞新材料科技有限公司 | Method for extracting and enriching lepidolite based on lithium ore pressed tail mud |
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