Method for recovering iron and lithium mica associated with tungsten ore

Abstract

The application provides a tungsten ore associated iron lepidolite recovery method, wherein the method comprises the following steps: obtaining total tailings screened by a tungsten ore concentrator, and performing primary enrichment treatment on the total tailings to obtain corresponding first rough concentrate and first tailings, the first rough concentrate containing iron lepidolite; performing secondary enrichment treatment on the first rough concentrate to obtain corresponding second rough concentrate and second tailings, and performing concentration and slurry conditioning treatment on the second rough concentrate in sequence to obtain corresponding ore slurry; performing tailing discharge treatment on the ore slurry by a flotation machine to obtain corresponding third rough concentrate and third tailings, and performing concentration treatment on the third rough concentrate by the flotation machine to obtain corresponding iron lepidolite concentrate. The application can effectively remove impurities in the tailings, and improve the recovery efficiency of the iron lepidolite concentrate.

Description

Technical Field

[0001] This invention relates to the field of ore sorting technology, and in particular to a method for recovering lithium iron ore mica associated with tungsten ore. Background Technology

[0002] With the advancement of science and technology and the rapid development of productivity, new energy electric vehicle technology has also developed rapidly and has become widespread in people's daily lives, greatly facilitating people's lives.

[0003] The power battery pack is one of the core components of new energy electric vehicles, used to provide electrical energy to the drive motor so that the vehicle can run. Specifically, existing power battery packs are all made of lithium-containing materials, therefore, the development and recycling of lithium ore is particularly important.

[0004] In the process of developing tungsten mines, lithium iron ore mica is often generated as an associated resource. Lithium ore can be extracted from lithium iron ore mica. Most existing technologies extract the lithium ore from tungsten mines through basic impurity removal methods such as filtration, screening, and diversion. However, the lithium ore obtained by the above recovery methods still contains a lot of impurities and has low recovery efficiency, which is not conducive to the development of new energy technologies. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a method for recovering lithium iron ore mica associated with tungsten ore, so as to solve the problem that the lithium ore raw materials obtained by the existing recovery methods still contain a lot of impurities and the recovery efficiency is low.

[0006] One embodiment of the present invention proposes a method for recovering lithium iron phosphate mica associated with tungsten ore, wherein the method includes:

[0007] The total tailings screened out by the tungsten ore beneficiation plant are obtained, and the total tailings are enriched once to obtain the corresponding first rough concentrate and first tailings, wherein the first rough concentrate contains lithium iron ore mica.

[0008] The first rough concentrate is subjected to a secondary enrichment process to obtain the corresponding second rough concentrate and second tailings. The second rough concentrate is then concentrated and slurry-adjusted in sequence to obtain the corresponding slurry.

[0009] The slurry is treated by a flotation machine to obtain the corresponding third rough concentrate and third tailings. The third rough concentrate is then treated by the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate.

[0010] The beneficial effects of this invention are as follows: by performing a first enrichment treatment and a second enrichment treatment on the obtained total tailings, the required rough concentrate can be accurately screened out. Furthermore, the obtained rough concentrate is concentrated and slurry-adjusted to obtain the corresponding slurry. Specifically, due to the high concentration of the slurry, the purity of lithium iron phosphate mica is correspondingly improved. Based on this, by simply performing tailings discharge and fine cleaning treatment on the current slurry using a flotation machine, the required lithium iron phosphate mica concentrate can be recovered from the slurry with high purity, removing excess impurities and improving recovery efficiency.

[0011] Furthermore, the step of performing a primary enrichment treatment on the total tailings includes:

[0012] When the total tailings are obtained, the total tailings are input into a high-intensity magnetic separator, and the total tailings are subjected to a roughing and a scavenging process by the high-intensity magnetic separator, so as to screen out the first rough concentrate and the first tailings from the total tailings.

[0013] Remove the first tailings and retain the first rough concentrate.

[0014] Furthermore, the step of performing a roughing and a scavenging process on the total tailings using the high-intensity magnetic separator includes:

[0015] The total tailings are subjected to a coarse separation using the high-intensity magnetic separator at a magnetic field strength of 1.0T, and a scavenging process using the same high-intensity magnetic separator at a magnetic field strength of 1.3T.

[0016] Furthermore, the steps of performing secondary enrichment treatment on the first rough concentrate to obtain the corresponding second rough concentrate and second tailings, and sequentially concentrating and adjusting the second rough concentrate to obtain the corresponding slurry include:

[0017] The first rough concentrate is prepared into a corresponding slurry, and the slurry is concentrated to obtain a corresponding concentrated slurry.

[0018] The concentrated slurry is fed into a ball mill, and the concentrated slurry is ground by the ball mill to obtain the corresponding target slurry.

[0019] The target slurry is subjected to secondary roughing and secondary scavenging treatment by the high-intensity magnetic separator to obtain the second rough concentrate and the second tailings.

[0020] Remove the second tailings and retain the second rough concentrate.

[0021] Furthermore, the step of performing secondary roughing and secondary scavenging treatment on the target slurry using the high-intensity magnetic separator includes:

[0022] The target slurry is subjected to secondary roughing treatment by the high-intensity magnetic separator at a magnetic separation intensity of 0.7T, and then subjected to secondary scavenging treatment by the high-intensity magnetic separator at a magnetic separation intensity of 1.3T.

[0023] Furthermore, the step of treating the slurry with a flotation machine to obtain the corresponding third rough concentrate and third tailings includes:

[0024] The second rough concentrate is fed into a mixing tank, and modifiers, inhibitors and collectors are added to the mixing tank to perform slurry treatment on the second rough concentrate in the mixing tank;

[0025] The second rough concentrate after slurry conditioning is fed into the flotation machine, and the second rough concentrate after slurry conditioning is subjected to three roughing and three scavenging processes by the flotation machine to obtain the third rough concentrate and the third tailings.

[0026] Furthermore, the method also includes:

[0027] During the first roughing, second roughing, and third roughing processes, 200 g / t of sodium carbonate, 400 g / t of sodium hexametaphosphate, and 1000 g / t of the collector are added, and corresponding scavenging treatments are performed.

[0028] Furthermore, the method also includes:

[0029] The collector 500g / t is added to the first, second, and third tailings to collect and process them.

[0030] Furthermore, the step of refining the third rough concentrate using the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate includes:

[0031] The third rough concentrate is subjected to a first, second, and third fine-tuning process using the flotation machine to obtain the lithium iron phosphate mica concentrate.

[0032] Furthermore, the method also includes:

[0033] 200 g / t of sodium hexametaphosphate is added in the first refining process and 200 g / t of sodium hexametaphosphate is added in the second refining process to obtain the lithium iron phosphate mica concentrate.

[0034] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] Figure 1 The flowchart illustrates the method for recovering lithium iron ore mica associated with tungsten ore according to the first embodiment of the present invention. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Please see Figure 1 The image shows a method for recovering lithium iron ore associated with tungsten ore in the first embodiment of the present invention. The method provided in this embodiment can recover the required lithium iron ore concentrate from the slurry with high purity, while removing excess impurities and improving recovery efficiency.

[0040] Specifically, the method for recovering lithium iron phosphate mica associated with tungsten ore provided in this embodiment includes the following steps:

[0041] Step S10: Obtain the total tailings screened out by the tungsten ore beneficiation plant, and perform a enrichment process on the total tailings to obtain the corresponding first rough concentrate and the first tailings, wherein the first rough concentrate contains lithium iron ore mica.

[0042] Step S20: The first rough concentrate is subjected to a secondary enrichment process to obtain the corresponding second rough concentrate and the second tailings, and the second rough concentrate is subjected to concentration and slurry conditioning processes in sequence to obtain the corresponding slurry.

[0043] Step S30: The slurry is treated by a flotation machine to obtain the corresponding third rough concentrate and third tailings. The third rough concentrate is then treated by the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate.

[0044] Furthermore, the step of performing a primary enrichment treatment on the total tailings includes:

[0045] When the total tailings are obtained, the total tailings are input into a high-intensity magnetic separator, and the total tailings are subjected to a roughing and a scavenging process by the high-intensity magnetic separator, so as to screen out the first rough concentrate and the first tailings from the total tailings.

[0046] Remove the first tailings and retain the first rough concentrate.

[0047] Furthermore, the step of performing a roughing and a scavenging process on the total tailings using the high-intensity magnetic separator includes:

[0048] The total tailings are subjected to a coarse separation using the high-intensity magnetic separator at a magnetic field strength of 1.0T, and a scavenging process using the same high-intensity magnetic separator at a magnetic field strength of 1.3T.

[0049] Furthermore, the steps of performing secondary enrichment treatment on the first rough concentrate to obtain the corresponding second rough concentrate and second tailings, and sequentially concentrating and adjusting the second rough concentrate to obtain the corresponding slurry include:

[0050] The first rough concentrate is prepared into a corresponding slurry, and the slurry is concentrated to obtain a corresponding concentrated slurry.

[0051] The concentrated slurry is fed into a ball mill and ground by the ball mill to obtain the corresponding target slurry. After the concentrated slurry is processed by the ball mill, the proportion of ore with a particle size of 0.076 mm in the concentrated slurry reaches 66%, and the concentration of the slurry after the ball mill processing reaches 50%.

[0052] The target slurry is subjected to secondary roughing and secondary scavenging treatment by the high-intensity magnetic separator to obtain the second rough concentrate and the second tailings.

[0053] Remove the second tailings and retain the second rough concentrate.

[0054] Furthermore, the step of performing secondary roughing and secondary scavenging treatment on the target slurry using the high-intensity magnetic separator includes:

[0055] The target slurry is subjected to secondary roughing treatment by the high-intensity magnetic separator at a magnetic separation intensity of 0.7T, and then subjected to secondary scavenging treatment by the high-intensity magnetic separator at a magnetic separation intensity of 1.3T.

[0056] Furthermore, the step of treating the slurry with a flotation machine to obtain the corresponding third rough concentrate and third tailings includes:

[0057] The second rough concentrate is fed into a mixing tank, and modifiers, inhibitors and collectors are added to the mixing tank to perform slurry treatment on the second rough concentrate, wherein the concentration of the second rough concentrate after slurry treatment will reach 25%.

[0058] The second rough concentrate after slurry conditioning is fed into the flotation machine, and the second rough concentrate after slurry conditioning is subjected to three roughing and three scavenging processes by the flotation machine to obtain the third rough concentrate and the third tailings.

[0059] Furthermore, the method also includes:

[0060] During the first roughing, second roughing, and third roughing processes, 200 g / t of sodium carbonate, 400 g / t of sodium hexametaphosphate, and 1000 g / t of the collector are added, and corresponding scavenging treatments are performed.

[0061] Furthermore, the method also includes:

[0062] The collector 500g / t is added to the first, second, and third tailings to collect and process them.

[0063] Furthermore, the step of refining the third rough concentrate using the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate includes:

[0064] The third rough concentrate is subjected to primary, secondary, and tertiary refining processes by the flotation machine to obtain the lithium iron phosphate mica concentrate. In this embodiment, the rough concentrate and tailings produced after the primary refining process are subjected to the secondary refining process, and the rough concentrate and tailings produced after the secondary refining process are subjected to the tertiary refining process until the lithium iron phosphate mica concentrate is obtained. At the same time, the tailings produced after the secondary refining process are returned to the flotation cell of the flotation machine that performed the primary refining process for corresponding cyclic selection. Similarly, the tailings produced after the tertiary refining process are returned to the flotation cell of the flotation machine that performed the secondary refining process for corresponding cyclic selection.

[0065] Furthermore, the method also includes:

[0066] In the first and second cleaning processes, 200 g / t of sodium hexametaphosphate is added to obtain the lithium-iron mica concentrate. No reagents are added during the third cleaning process. The final yield of the lithium-iron mica concentrate obtained from the total tailings using this method is 12.17%, with a lithium oxide grade of 1.75% and a recovery rate of 47.33%, representing a significant improvement over existing technologies.

[0067] Furthermore, for ease of understanding, the present invention provides the following specific embodiments to further explain and illustrate:

[0068] Second Embodiment

[0069] In this embodiment, sodium carbonate is added at 100 g / t, sodium hexametaphosphate at 300 g / t, and collector at 800 g / t during the first, second, and third roughing processes. Subsequent scavenging and cleaning processes are then carried out to obtain the desired lithium iron phosphate mica concentrate.

[0070] Third Embodiment

[0071] In this embodiment, sodium carbonate is added at 300 g / t, sodium hexametaphosphate at 500 g / t, and collector at 1100 g / t during the first, second, and third roughing processes. Subsequent scavenging and cleaning processes are then carried out to obtain the desired lithium iron phosphate mica concentrate.

[0072] Fourth embodiment

[0073] In this embodiment, sodium carbonate is added at 400 g / t, sodium hexametaphosphate at 600 g / t, and collector at 1200 g / t during the first, second, and third roughing processes. Subsequent scavenging and cleaning processes are then carried out to obtain the desired lithium iron phosphate mica concentrate.

[0074] Fifth Embodiment

[0075] In this embodiment, sodium carbonate is added at 50 g / t, sodium hexametaphosphate at 100 g / t, and collector at 600 g / t during the first, second, and third roughing processes. Subsequent scavenging and cleaning processes are then carried out to obtain the desired lithium iron phosphate mica concentrate.

[0076] Furthermore, the results generated by the above embodiments are shown in Table 1 below:

[0077]

[0078]

[0079] As can be seen from the above data, although the sodium carbonate, sodium hexametaphosphate, and collector added in the above embodiments are different, the yield of lithium iron phosphate concentrate, the grade of lithium oxide, and the recovery rate are not significantly different. Therefore, the above embodiments of the present invention can all produce a high recovery rate, thereby extracting more lithium iron phosphate ore from the same amount of tailings compared with the prior art, while effectively removing excess impurities, which is beneficial to the development of the new energy industry.

[0080] It should be noted that the above implementation process is only to illustrate the feasibility of this application, but it does not mean that the method for recovering lithium iron ore associated with tungsten ore is limited to the above implementation process. On the contrary, as long as the method for recovering lithium iron ore associated with tungsten ore can be implemented, it can be included in the feasible implementation scheme of this application.

[0081] In summary, the method for recovering lithium iron ore associated with tungsten ore in the above embodiments of the present invention can recover the required lithium iron ore concentrate from the slurry with high purity, removes excess impurities, and improves recovery efficiency.

[0082] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for recovering lithium iron phosphate mica associated with tungsten ore, characterized in that, The method includes: The total tailings screened out by the tungsten ore beneficiation plant are obtained, and the total tailings are enriched once to obtain the corresponding first rough concentrate and first tailings, wherein the first rough concentrate contains lithium iron ore mica. The first rough concentrate is subjected to a secondary enrichment process to obtain the corresponding second rough concentrate and second tailings. The second rough concentrate is then concentrated and slurry-adjusted in sequence to obtain the corresponding slurry. The slurry is treated by a flotation machine to obtain the corresponding third rough concentrate and third tailings. The third rough concentrate is then treated by the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate. The step of performing a primary enrichment treatment on the total tailings includes: When the total tailings are obtained, the total tailings are input into a high-intensity magnetic separator, and the total tailings are subjected to a roughing and a scavenging process by the high-intensity magnetic separator, so as to screen out the first rough concentrate and the first tailings from the total tailings. Remove the first tailings and retain the first rough concentrate; The steps of performing a roughing and a scavenging process on the total tailings using the high-intensity magnetic separator include: The total tailings are subjected to a coarse separation using the high-intensity magnetic separator under a magnetic field strength of 1.0T, and a scavenging process is performed using the high-intensity magnetic separator under a magnetic field strength of 1.3T. The steps of performing secondary enrichment treatment on the first rough concentrate to obtain a corresponding second rough concentrate and a second tailings, and sequentially concentrating and adjusting the second rough concentrate to obtain a corresponding slurry include: The first rough concentrate is prepared into a corresponding slurry, and the slurry is concentrated to obtain a corresponding concentrated slurry. The concentrated slurry is fed into a ball mill, and the concentrated slurry is ground by the ball mill to obtain the corresponding target slurry. The target slurry is subjected to secondary roughing and secondary scavenging treatment by the high-intensity magnetic separator to obtain the second rough concentrate and the second tailings. Remove the second tailings and retain the second rough concentrate; The steps of performing secondary roughing and secondary scavenging treatments on the target slurry using the high-intensity magnetic separator include: The target slurry is subjected to secondary roughing treatment by the high-intensity magnetic separator under an environment with a magnetic separation intensity of 0.7T, and the target slurry is subjected to secondary scavenging treatment by the high-intensity magnetic separator under an environment with a magnetic separation intensity of 1.3T. The step of treating the slurry by flotation to obtain the corresponding third rough concentrate and third tailings includes: The second rough concentrate is fed into a mixing tank, and modifiers, inhibitors and collectors are added to the mixing tank to perform slurry treatment on the second rough concentrate in the mixing tank; The second rough concentrate after slurry conditioning is fed into the flotation machine, and the second rough concentrate after slurry conditioning is subjected to three roughing and three scavenging processes by the flotation machine to obtain the third rough concentrate and the third tailings. The method further includes: During the first roughing, second roughing, and third roughing processes, 200 g / t of sodium carbonate, 400 g / t of sodium hexametaphosphate, and 1000 g / t of the collector are added, and corresponding scavenging treatments are performed.

2. The method for recovering lithium iron phosphate mica associated with tungsten ore according to claim 1, characterized in that: The method further includes: The collector 500g / t is added to the first, second, and third tailings to collect and process them.

3. The method for recovering lithium iron phosphate mica associated with tungsten ore according to claim 2, characterized in that: The step of refining the third rough concentrate using the flotation machine to obtain the corresponding lithium iron phosphate mica concentrate includes: The third rough concentrate is subjected to a first, second, and third fine-tuning process using the flotation machine to obtain the lithium iron phosphate mica concentrate.

4. The method for recovering lithium iron phosphate mica associated with tungsten ore according to claim 3, characterized in that: The method further includes: 200 g / t of sodium hexametaphosphate is added in the first refining process and 200 g / t of sodium hexametaphosphate is added in the second refining process to obtain the lithium iron phosphate mica concentrate.

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