A mineral processing process for recovering mica from iron tailings

Abstract

The present invention relates to the field of mineral processing technology and provides a beneficiation process for recovering mica from iron tailings, wherein the iron tailings contain 20-30% mica with a particle size of 43 μm or less. The process comprises: adding water to the concentrated and de-doped iron tailings to adjust the slurry to a mass concentration of 25-35%, then adjusting the pH of the slurry to 8-10, and then sequentially adding a slime conditioner comprising sodium hexametaphosphate, carboxymethyl cellulose, and starch, and a mica collector comprising sodium oleate, coconut amine, alkyl alcohol, and Span 60 surfactant for flotation. By employing a specific slime conditioner and mica collector, the present invention significantly improves the mica recovery rate for iron tailings with a high fine-grained mica content without the need for prior desliming, and simultaneously produces a high-grade mica concentrate. The process has the advantages of a simple process flow, advanced technical indicators, strong adaptability, and is readily applicable for industrial promotion and application.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, in particular to a beneficiation process for recovering mica from iron tailings. Background Art

[0002] Most of my country's mineral resources are of low grade, resulting in large quantities of tailings discharged during the beneficiation process. Due to limitations in beneficiation technology and production equipment, tailings often contain a certain amount of useful metals and minerals. If not recovered, a large amount of valuable minerals will be discarded in the tailings, wasting resources and polluting the environment. Therefore, fully utilizing tailings has become a crucial aspect of sustainable, green mining development. Mica is an important non-metallic resource widely used in modern industry. The content of fine-grained mica in iron tailings can reach 10-30%. Recovering mica from iron tailings would both increase its value and reduce its discharge.

[0003] Flotation is often used to recover fine-grained mica, typically using a cationic collector in an acidic slurry or a mixed anionic and cationic collector in an alkaline slurry. However, iron tailings containing fine-grained mica are severely muddied, and the fine-grained mica minerals are intermingled with each other. The fine particles have a large specific surface area and surface energy. Conventional flotation reagents have poor adsorption selectivity, making flotation difficult. Furthermore, conventional flotation processes are difficult to improve the concentrate grade and recovery rate. To achieve this, large amounts of reagents are generally required, often more than ten times the amount used in conventional flotation processes. Therefore, to ensure normal flotation, the industry generally pre-de-sludges the iron tailings to remove the fine-grained mud before flotation. However, de-sludge inevitably results in a large amount of fine-grained mica being lost in the mud, which directly reduces the mica recovery rate.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The present invention provides a beneficiation process for recovering mica from iron tailings, which is used to solve the defect in the prior art that it is difficult to achieve both high mica concentrate recovery rate and high grade when recovering fine-grained mica from iron tailings. By inventing a specific ore slime regulator in combination with a specific mica collector, high-grade mica concentrate is obtained while ensuring flotation without desliming, and the recovery rate of the mica concentrate is improved.

[0006] Specifically, the present invention provides a beneficiation process for recovering mica from iron tailings, wherein mica with a particle size of less than 43 μm accounts for 20-30% of the iron tailings. The process comprises: adding water to the concentrated and de-doped iron tailings to adjust the pulp to a mass concentration of 25-35%, then adjusting the pH value of the pulp to 8-10, and then sequentially adding a slime adjuster comprising sodium hexametaphosphate, carboxymethyl cellulose and starch and a mica collector comprising sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant for flotation.

[0007] Adjusting the pH value of the ore pulp to 8-10 means adding alkaline substances such as sodium hydroxide or sodium carbonate to the ore pulp for adjustment.

[0008] Because iron tailings are inherently fine and severely muddy, a desludging process is typically performed to remove the fine mud before flotation recovery of mica to ensure proper flotation. This not only increases costs but also results in mica loss during the desludging process. The present invention utilizes a slime conditioner in combination with a mica collector, effectively suppressing fine mud minerals while allowing the mica minerals to be selectively mineralized and floated. This allows for efficient mica recovery without desludging prior to flotation, resulting in a high-grade mica concentrate. In particular, the mica flotation slime adjuster of the present invention contains three components: sodium hexametaphosphate, carboxymethyl cellulose and starch. Among them, sodium hexametaphosphate has a good effect of dispersing the slurry and is also an effective inhibitor of silicate minerals such as quartz and calcite; carboxymethyl cellulose is obtained by carboxymethylating cellulose, and is easily adsorbed on the surface of fine-grained gangue minerals in the slurry, and can effectively inhibit secondary silicate minerals with high floatability, such as serpentine and chlorite; starch is an effective inhibitor of hematite and magnetite, avoiding the influence of iron minerals remaining in iron tailings on mica concentrate. In the experiment, it was found that the ore slime adjuster of the present invention not only has a strong inhibitory force and can significantly inhibit the floating of fine mud gangue minerals through the synergistic effect of each component, but also has the characteristics of good dispersibility, etc., which creates a good basic condition for the selective adsorption of the mica collector and ensures the grade of the mica concentrate under non-de-sliming flotation conditions. The mica collector of the present invention contains four ingredients: sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant. Among them, sodium oleate, as an anionic collector, can increase the negative charge of the surface of the mica mineral, creating conditions for the adsorption of cationic collectors on the mica surface; coconut amine is a product of coconut oil acid after amination. Due to its unsaturated bond, it has good selectivity for mica compared with traditional collectors such as dodecylamine and octadecylamine; alkyl alcohol, as a solvent, can effectively enhance the dispersion of various components in the mica collector in the slurry, and has the effect of improving the foam state; Span60, namely sorbitan stearate, is a non Ionic surfactant, with good emulsification effect; the mica collector makes full use of the interactive synergistic effect between anionic and cationic collectors and alkyl alcohol solvents and Span60 surfactants, so that each component is easily dissolved and dispersed in the slurry, has good selective adsorption on the surface of mica minerals, has the advantages of strong collecting power, good selectivity, stable properties, etc., while ensuring the grade of mica concentrate under non-desliming flotation conditions, it also greatly improves the recovery rate of mica concentrate; in particular, it was found in experiments that the introduction of Span60 components can reduce the dosage of mica collector, which helps to obtain higher-grade mica concentrate.

[0009] According to the beneficiation process for recovering mica from iron tailings provided by the present invention, when the mass contents of sodium hexametaphosphate, carboxymethyl cellulose and starch in the slime adjuster are 60-80wt%, 10-20wt% and 10-20wt%, respectively; and / or when the mass contents of sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant in the mica collector are 40-60wt%, 20-30wt%, 10-20wt% and 5-15wt%, respectively, the mica flotation slime adjuster and mica flotation collector of the present invention have the best flotation effect.

[0010] According to the mineral processing process for recovering mica from iron tailings provided by the present invention, the flotation includes roughing, scavenging and concentrating operations; the amounts of the slime adjuster and the mica collector added in the roughing are 100-500 g / t and 200-1000 g / t, respectively.

[0011] The mineral processing process for recovering mica from iron tailings provided by the present invention further includes: sequentially adding the slime adjuster and the mica collector to the roughing tailings obtained from the roughing for scavenging; and / or, adding the slime adjuster to the mica coarse concentrate obtained from the roughing for beneficiation.

[0012] According to the mineral processing process for recovering mica from iron tailings provided by the present invention, the amounts of the slime adjuster and the mica collector added in the sweeping are 50-200 g / t and 100-300 g / t, respectively; and / or the amount of the slime adjuster added in the concentrating is 50-100 g / t.

[0013] According to the mineral processing process for recovering mica from iron tailings provided by the present invention, the number of scavenging is 1 to 2 times; and / or the number of cleaning is 3 to 6 times.

[0014] According to the mineral processing process for recovering mica from iron tailings provided by the present invention, the selected tailings are sequentially returned to the previous flotation operation; and / or the scavenged concentrate is sequentially returned to the previous flotation operation.

[0015] The present invention provides a beneficiation process for recovering mica from iron tailings, which are tailings discharged from iron ore processing plants that primarily recover iron through magnetic separation, gravity separation, or flotation. The primary minerals in the iron tailings include quartz, muscovite, hematite, dolomite, chlorite, and the like.

[0016] According to the present invention, the alkyl alcohol has the general structural formula: R-OH, where R is a hydrocarbon group or hydrocarbon derivative containing 6 to 8 carbon atoms. When an alkyl alcohol with this structure is used, the components of the mica collector are best dispersed in the ore slurry, resulting in a mica concentrate with a higher grade and recovery rate.

[0017] According to the mineral processing process for recovering mica from iron tailings provided by the present invention, the concentration and removal of reagents include: concentrating the iron tailings through a thickener, centrifuge, cyclone, etc. to a pulp mass concentration of 65-75%, and removing moisture and residual flotation reagents in the pulp.

[0018] The present invention provides a beneficiation process for recovering mica from iron tailings. By employing a specific slime conditioner and mica collector, the process achieves efficient flotation recovery of fine-grained mica minerals from iron tailings with a high fine-grained mica content, without the need for pre-desliming. Compared to traditional pre-desliming flotation processes, the present invention effectively avoids mica loss in the slime, significantly improves mica recovery, and simultaneously produces a high-grade mica concentrate. The process boasts a simple process flow, advanced technical specifications, and strong adaptability, making it readily adaptable for industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the flow diagrams of the mineral processing process for recovering mica from iron tailings provided by the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] If no specific techniques or conditions are specified in the examples, the experiments were carried out according to the techniques or conditions described in the literature in the field or according to the product instructions. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased through regular channels.

[0023] The following combination Figure 1 The present invention describes a mineral processing process for recovering mica from iron tailings.

[0024] Example 1

[0025] The K2O content in a certain iron ore tailings is 1.21%, with a particle size of -74μm accounting for 35%. The main minerals are quartz, muscovite, hematite, dolomite, and chlorite. The mica in the tailings is primarily muscovite, with a small amount of biotite. The mica is primarily produced as a single piece, with a small amount occurring as fine-grained radial aggregates embedded in quartz. The embedded particle size of the mica is concentrated between 20 and 147μm, with mica below 43μm accounting for 25%.

[0026] like Figure 1 As shown, a process for recovering mica from iron tailings is used for beneficiation and recovery of mica from the iron tailings, which may specifically include the following steps:

[0027] (1) Concentration and removal of flotation reagents: The iron tailings slurry is concentrated by a thickener to a mass concentration of 75%, and the water and residual flotation reagents in the slurry are removed;

[0028] (2) Slurry mixing: add water to the concentrated slurry to prepare a slurry with a mass percentage concentration of 30%, and stir in a mixing barrel for 3 minutes at a speed of 1750 r / min;

[0029] (3) Roughing operation: The pulp is introduced into the roughing flotation machine, and first 500 g / t of sodium hydroxide is added to the feed to adjust the pulp pH value to 9, and then 200 g / t of a slime adjuster and 500 g / t of a mica collector are added in sequence, and stirred for 2 minutes respectively to perform a roughing operation to obtain a mica rough concentrate and a roughing tailing; wherein, the slime adjuster is composed of sodium hexametaphosphate, carboxymethyl cellulose and starch in a mass ratio of 70:15:15, and the mica collector is composed of sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant in a mass ratio of 50:25:15:10, and the alkyl alcohol is octanol.

[0030] (4) Scavenging operation: 100 g / t of the above-mentioned slime regulator and 200 g / t of the above-mentioned mica collector are added to the roughing tailings in sequence to perform one scavenging operation. The scavenged concentrate is returned to the previous flotation operation in sequence.

[0031] (5) Concentration operation: 100 g / t of the above-mentioned slime adjuster was continuously added to the mica coarse concentrate, and three concentrating operations were carried out. The concentrating tailings were sequentially returned to the previous flotation operation to obtain a mica concentrate with a K2O grade of 7.89% and a recovery rate of 64.41%.

[0032] Example 2

[0033] The K2O content in a certain iron ore tailings is 1.21%, with a particle size of -74μm accounting for 35%. The main minerals are quartz, muscovite, hematite, dolomite, and chlorite. The mica in the tailings is primarily muscovite, with a small amount of biotite. The mica is primarily produced as a single piece, with a small amount occurring as fine-grained radial aggregates embedded in quartz. The embedded particle size of the mica is concentrated between 20 and 147μm, with mica below 43μm accounting for 25%.

[0034] A process for recovering mica from iron tailings is used for beneficiating and recovering mica from the iron tailings, and specifically may include the following steps:

[0035] (1) Concentration and removal of flotation reagents: The iron tailings pulp is concentrated by centrifuge to a mass concentration of 75%, and the water and residual flotation reagents in the pulp are removed;

[0036] (2) Slurry mixing: add water to the concentrated slurry to prepare a slurry with a mass percentage concentration of 35%, and stir in a mixing barrel for 3 minutes at a speed of 1750 r / min;

[0037] (3) Roughing operation: The pulp is introduced into the roughing flotation machine, and first 500 g / t of sodium hydroxide is added to the feed to adjust the pulp pH value to 10, and then 500 g / t of a slime adjuster and 1000 g / t of a mica collector are added in sequence, and stirred for 2 minutes respectively to perform a roughing operation to obtain a mica rough concentrate and a roughing tailing; wherein, the slime adjuster is composed of sodium hexametaphosphate, carboxymethyl cellulose and starch in a mass ratio of 60:20:20, and the mica collector is composed of sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant in a mass ratio of 40:25:20:15, and the alkyl alcohol is hexanol.

[0038] (4) Scavenging operation: 200 g / t of the above-mentioned slime regulator and 300 g / t of the above-mentioned mica collector are added to the roughing tailings in sequence to perform one scavenging operation. The scavenged concentrate is returned to the previous flotation operation in sequence.

[0039] (5) Concentration operation: 100 g / t of the above-mentioned slime adjuster was continuously added to the mica coarse concentrate, and three concentrating operations were carried out. The concentrating tailings were sequentially returned to the previous flotation operation to obtain a mica concentrate with a K2O grade of 7.68% and a recovery rate of 65.52%.

[0040] Example 3

[0041] The K2O content in a certain iron ore tailings is 1.21%, with a particle size of -74μm accounting for 35%. The main minerals are quartz, muscovite, hematite, dolomite, and chlorite. The mica in the tailings is primarily muscovite, with a small amount of biotite. The mica is primarily produced as a single piece, with a small amount occurring as fine-grained radial aggregates embedded in quartz. The embedded particle size of the mica is concentrated between 20 and 147μm, with mica below 43μm accounting for 25%.

[0042] A process for recovering mica from iron tailings is used for beneficiating and recovering mica from the iron tailings, and specifically may include the following steps:

[0043] (1) Concentration and removal of flotation reagents: The iron tailings slurry is concentrated by a cyclone to a mass concentration of 75%, and the water and residual flotation reagents in the slurry are removed;

[0044] (2) Slurry mixing: add water to the concentrated slurry to prepare a slurry with a mass percentage concentration of 25%, and stir in a mixing barrel for 3 minutes at a speed of 1750 r / min;

[0045] (3) Roughing operation: The pulp is introduced into the roughing flotation machine, and first 500 g / t of sodium hydroxide is added to the feed to adjust the pulp pH value to 8, and then 100 g / t of a slime adjuster and 200 g / t of a mica collector are added in sequence, and stirred for 2 minutes respectively to perform a roughing operation to obtain a mica rough concentrate and a roughing tailing; wherein, the slime adjuster is composed of sodium hexametaphosphate, carboxymethyl cellulose and starch in a mass ratio of 80:10:10, and the mica collector is composed of sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant in a mass ratio of 60:20:10:10, and the alkyl alcohol is octanol.

[0046] (4) Scavenging operation: 50 g / t of the above-mentioned slime regulator and 100 g / t of the above-mentioned mica collector are added to the roughing tailings in sequence, and a scavenging operation is performed. The scavenged concentrate is sequentially returned to the previous flotation operation;

[0047] (5) Concentration operation: The above-mentioned slime adjuster was continuously added to the mica coarse concentrate at a feed rate of 50 g / t, and three concentration operations were performed. The concentrated tailings were sequentially returned to the previous flotation operation to obtain a mica concentrate with a K2O grade of 7.76% and a recovery rate of 65.28%.

[0048] Comparative Example 1

[0049] A beneficiation process for the iron tailings slurry in the above-mentioned Example 1 is basically the same as that in Example 1, except that: before step (1), pre-desliming is first performed by a cyclone, and then the sludge regulator is replaced by water glass, and the mica collector is replaced by oleic acid and dodecylamine as anionic and cationic collectors, respectively, to obtain a mica concentrate with a K2O grade of 7.63% and a recovery rate of 46.82%.

[0050] Comparative Example 2

[0051] A beneficiation process for the iron tailings slurry in Example 1 is basically the same as Example 1, except that water glass is used as a regulator, oleic acid and dodecylamine are anionic and cationic collectors, respectively, and a mica concentrate with a K2O grade of 6.18% and a recovery rate of 65.23% is obtained by adjusting the optimal dosage.

[0052] It can be seen from Example 1 and Comparative Examples 1-2 that the grade of the mica concentrate obtained by the conventional flotation process with pre-desliming is close to that of the present invention, but the mica recovery rate is significantly lower than the flotation recovery rate of the present invention; and if a conventional flotation agent is used without pre-desliming, the mica recovery rate obtained is close to that of the present invention, but the grade of the mica concentrate is significantly lower than that of the mica of the present invention.

[0053] Comparative Example 3

[0054] A beneficiation process for the iron tailings slurry in the above-mentioned Example 1 is basically the same as that in Example 1, except that span60 is replaced by NP10, and a mica concentrate with a K2O grade of 7.36% and a recovery rate of 58.03% is obtained.

[0055] Comparative Example 4

[0056] A beneficiation process for the iron tailings slurry in the above-mentioned Example 1 is basically the same as that in Example 1, except that span60 is replaced by Tween80, and a mica concentrate with a K2O grade of 7.19% and a recovery rate of 56.81% is obtained.

[0057] Comparative Example 5

[0058] A beneficiation process for the iron tailings slurry in Example 1 is basically the same as Example 1, except that the mica collector is replaced by sodium oleate, coconut amine and alkyl alcohol in a mass ratio of 50:25:15, and the alkyl alcohol is octanol, and a mica concentrate with a K2O grade of 6.95% and a recovery rate of 55.32% is obtained.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A beneficiation process for recovering mica from iron tailings, wherein mica with a particle size of 43 μm or less accounts for 20-30% of the iron tailings; characterized in that: include: Water is added to the concentrated and de-doped iron tailings to adjust the pulp to a mass concentration of 25-35%, and then the pH value of the pulp is adjusted to 8-10, and then a slime adjuster including sodium hexametaphosphate, carboxymethyl cellulose and starch and a mica collector including sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant are added in sequence for flotation.

2. The ore dressing process for recovering mica from iron tailings according to claim 1, wherein: In the described slime conditioner, the mass contents of sodium hexametaphosphate, carboxymethyl cellulose and starch are 60-80wt%, 10-20wt% and 10-20wt% respectively; and / or, in the described mica collector, the mass contents of sodium oleate, coconut amine, alkyl alcohol and Span60 surfactant are 40-60wt%, 20-30wt%, 10-20wt% and 5-15wt% respectively.

3. The ore dressing process for recovering mica from iron tailings according to claim 1 or 2, characterized in that: The flotation includes roughing, scavenging and concentrating operations; the amounts of the slime adjuster and the mica collector added in the roughing are 100-500 g / t and 200-1000 g / t, respectively.

4. The ore dressing process for recovering mica from iron tailings according to claim 3, wherein: Also includes: adding the slime regulator and the mica collector to the roughing tailings obtained from the roughing to perform scavenging; and / or, adding the slime adjuster to the mica coarse concentrate obtained from the roughing to perform concentrating.

5. The ore dressing process for recovering mica from iron tailings according to claim 4, wherein: The amounts of the slime adjuster and the mica collector added in the sweeping process are 50-200 g / t and 100-300 g / t, respectively; and / or the amount of the slime adjuster added in the concentrating process is 50-100 g / t.

6. The ore dressing process for recovering mica from iron tailings according to claim 4 or 5, characterized in that: The number of scanning and selection is 1 to 2 times; and / or the number of selection and selection is 3 to 6 times.

7. The ore dressing process for recovering mica from iron tailings according to claim 6, wherein: The selected tailings are sequentially returned to the previous flotation operation; and / or the scavenged concentrates are sequentially returned to the previous flotation operation.

8. The ore dressing process for recovering mica from iron tailings according to any one of claims 1, 2, 4, 5, and 7, characterized in that: The iron tailings refer to the tailings discharged during the production process of an iron ore dressing plant that uses magnetic separation, gravity separation or flotation technology to mainly recover iron.

9. The ore dressing process for recovering mica from iron tailings according to claim 3, wherein: The iron tailings refer to the tailings discharged during the production process of an iron ore dressing plant that mainly uses magnetic separation, gravity separation or flotation technology to recover iron.

10. The mineral processing process for recovering mica from iron tailings according to claim 6, characterized in that: The iron tailings refer to the tailings discharged during the production process of an iron ore dressing plant that uses magnetic separation, gravity separation or flotation technology to mainly recover iron.

11. The ore dressing process for recovering mica from iron tailings according to any one of claims 1, 2, 4, 5, 7, 9 and 10, characterized in that: The general structural formula of the alkyl alcohol is: R-OH; wherein R is a hydrocarbon group or a hydrocarbon derivative containing 6 to 8 carbon atoms.

12. The mineral processing process for recovering mica from iron tailings according to claim 3, characterized in that: The general structural formula of the alkyl alcohol is: R-OH; wherein R is a hydrocarbon group or a hydrocarbon group derivative containing 6 to 8 carbon atoms.

13. The mineral processing process for recovering mica from iron tailings according to claim 6, characterized in that: The general structural formula of the alkyl alcohol is: R-OH; wherein R is a hydrocarbon group or a hydrocarbon derivative containing 6 to 8 carbon atoms.

14. The mineral processing process for recovering mica from iron tailings according to claim 8, characterized in that: The general structural formula of the alkyl alcohol is: R-OH; wherein R is a hydrocarbon group or a hydrocarbon group derivative containing 6 to 8 carbon atoms.

15. The ore dressing process for recovering mica from iron tailings according to any one of claims 1, 2, 4, 5, 7, 9, 10, 12 to 14, characterized in that: The concentration and de-agent process includes: concentrating the iron tailings until the mass concentration of the ore pulp reaches 65-75%, and removing water and residual flotation reagents in the ore pulp.

16. The mineral processing process for recovering mica from iron tailings according to claim 3, characterized in that: The concentration and de-agent process includes: concentrating the iron tailings until the mass concentration of the ore pulp reaches 65-75%, and removing water and residual flotation reagents in the ore pulp.

17. The mineral processing process for recovering mica from iron tailings according to claim 6, characterized in that: The concentration and de-agent process includes: concentrating the iron tailings until the mass concentration of the ore pulp reaches 65-75%, and removing water and residual flotation reagents in the ore pulp.

18. The mineral processing process for recovering mica from iron tailings according to claim 8, characterized in that: The concentration and de-agent process includes: concentrating the iron tailings until the mass concentration of the ore pulp reaches 65-75%, and removing water and residual flotation reagents in the ore pulp.

19. The mineral processing process for recovering mica from iron tailings according to claim 11, characterized in that: The concentration and de-agent process includes: concentrating the iron tailings until the mass concentration of the ore pulp reaches 65-75%, and removing water and residual flotation reagents in the ore pulp.

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