Comprehensive recycling and beneficiation method for mica type fluorite

Abstract

The invention discloses a comprehensive recovery and beneficiation method for mica type fluorite. The method comprises the following steps: (1) crushing mica type fluorite ore raw ore containing biotite and muscovite, and then carrying out wet ball milling; (2) performing magnetic separation on the ore pulp to obtain a magnetic product and a non-magnetic product; (3) non-magnetic product flotation (first roughing) concentrate and the magnetic product are combined to serve as a biotite product; (4) performing primary roughing (secondary roughing) and eighth concentration on the roughing-I tailings to obtain fluorite concentrate; and (5) primary roughing (third roughing) and fourth scavenging are conducted on tailings of the second roughing, and a muscovite product is obtained. According to the method, not only can the high-grade fluorite concentrate product be obtained, but also two byproducts of biotite and muscovite can be obtained at the same time, the amount of generated tailings is small, and efficient and high-valued comprehensive utilization of mineral resources is achieved.

Description

Technical Field

[0001] The invention relates to the field of mineral processing, and in particular to a comprehensive recovery and beneficiation method for mica-type fluorite. Background Art

[0002] Fluorite is an important non-metallic strategic mineral resource, mainly used in traditional industries such as fluorine chemical industry, metallurgy, building materials, and strategic emerging industries such as new energy and new materials. The demand for fluorite in the building materials industry and metallurgical industry has gradually shown a downward trend, while the demand for fluorite in the fluorine chemical industry and new energy industry has gradually increased. With the increasing demand for fluorite products, the degree of "poor, fine, and mixed" of fluorite mineral resources has intensified. The existing mining and processing technology cannot meet the efficient development and utilization of complex fluorite mineral resources, resulting in a growing global gap in fluorite products. As a non-renewable non-metallic resource, fluorite's economic value continues to increase and its strategic position becomes increasingly prominent. It has been listed as a strategic resource by many countries and regions.

[0003] Muscovite is the most common and widely used mica mineral. It has good insulation performance, high temperature resistance, stable physical and chemical properties, good thermal insulation, elasticity and toughness. After being processed into mica powder, it has good sliding properties, strong coverage and adhesion. Muscovite can be used in building materials to play a role in waterproofing, fire prevention, heat preservation, heat insulation and decoration; it can be used in paint to enhance the transparency and gloss of the paint and reduce costs; it can be used in coatings to effectively improve the anti-penetration, wear resistance and corrosion resistance of the coating film. In addition, muscovite is widely used in plastics, rubber, ceramics, chemicals and other fields.

[0004] Biotite is a type of mica mineral, mainly produced in metamorphic rocks, and also exists in other rocks such as granite. The main application of biotite is as a raw material for decorative coatings such as real stone paint; it can also be used as an insulating material, but due to its high iron content, its insulation performance is not as good as that of muscovite; small-sized biotite or biotite flakes are often used as fillers in building materials.

[0005] There are many existing methods for separating fluorite from mica. For example, CN115382660B discloses a method for separating fluorite-containing lithium mica concentrate, using caustic starch and sodium hydroxide as inhibitors, sulfonated oleic acid, diesel and sodium dodecylbenzene sulfonate as collectors to first select the fluorite product, and then using dodecylamine and octadecylamine as collectors to select the lithium mica product. CN118080173A discloses a reverse flotation separation method for fluorite-associated lithium mica ore, firstly flotating fluorite to obtain high-grade fluorite and low-grade fluorite, and then removing silicon and impurities from the low-grade fluorite tailings to obtain the lithium mica concentrate. CN117324125A discloses a composite flotation agent for fluorite-type lithium mica ore, which is composed of a cationic collector and an anionic collector in a mass ratio of 100-300:50-200, wherein the cationic collector is composed of a morpholine agent and an amine agent in a mass ratio of 50-100:100-200, and the anionic collector is composed of a fatty acid agent.

[0006] At present, the research on fluorite ore associated with mica mainly focuses on the separation of fluorite and lithium mica. Therefore, there is an urgent need for a process for separating fluorite, biotite, muscovite and other products from fluorite ore. Summary of the invention

[0007] The purpose of the present invention is to provide a comprehensive recovery and beneficiation method for mica-type fluorite, and to design a separation process in combination with the properties of the original ore, so as to obtain fluorite concentrate and two by-products, biotite and muscovite, which is an efficient and high-value comprehensive utilization of fluorite mineral resources.

[0008] The present invention provides a comprehensive recovery and beneficiation method for mica-type fluorite, comprising the following steps:

[0009] S1. crushing and ball-milling the mica-type fluorite ore to obtain a ball-milled product;

[0010] S2. The ball-milled product obtained in step S1 is slurried and magnetically separated to obtain a magnetic product and a non-magnetic product;

[0011] S3. The non-magnetic product obtained in step S2 is subjected to a first roughing flotation to obtain a roughing concentrate 1 and a roughing tailing 1; the roughing concentrate 1 and the magnetic product obtained in step S2 are combined as a biotite product;

[0012] S4. The roughing tailings 1 obtained in step S3 are subjected to a second roughing flotation to obtain a roughing concentrate 2 and a roughing tailings 2;

[0013] S5. The rougher concentrate 2 obtained in step S4 is subjected to eight rounds of concentrating to obtain a fluorite concentrate;

[0014] S6. The roughing tailings 2 obtained in step S4 are subjected to a third roughing flotation and a fourth scavenging to obtain a muscovite product.

[0015] Furthermore, in step S1, the fluorite grade in the mica-type fluorite ore is 20% to 40%, the muscovite content is 30% to 40%, and the biotite content is 10% to 15%.

[0016] Furthermore, in step S1, the crushing includes three stages: coarse crushing, medium crushing and fine crushing, wherein the coarse crushing and medium crushing use a jaw crusher, and the fine crushing uses a double-roll crusher, and the particle size of the final crushed product is less than 3 mm.

[0017] Furthermore, in step S1, the ball milling is wet ball milling, the grinding concentration is 60% to 70%, and sodium carbonate is added as a grinding aid in an amount of 400 to 600 g / t, and the particle size below 0.074 mm accounts for 80% to 95% of the ball milled product.

[0018] Furthermore, in step S2, the ball mill product is slurried to a pulp concentration of 20% to 30%, and the magnetic field strength of the magnetic separation is 10000 to 14000 Gs.

[0019] Furthermore, in steps S3 to S6, the mass concentration of solid particles in the flotation slurry is 25% to 35%, and the pH value is adjusted to 8 to 9.

[0020] Further, in step S3, the first roughing is followed by adding a regulator, an inhibitor, and a collector, each of which is stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the regulator used in the first roughing is sodium carbonate, and the amount is 400 to 600 g / t; the inhibitor is sodium silicate, and the amount is 2200 to 2500 g / t; the collector is pine oil, and the amount is 80 to 120 g / t;

[0021] Further, in step S4, only the collector is added in the second roughing, and the mixture is stirred for 2 to 3 minutes after the addition, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the collector used in the second roughing includes oxidized paraffin soap, sodium petroleum sulfonate, and coconut amine, and the mass ratio of each component is oxidized paraffin soap: sodium petroleum sulfonate: coconut amine = (80 to 100): (15 to 30): 1, and this collector is recorded as B1 collector, and the dosage is 450 to 550 g / t;

[0022] Further, in the eight concentrations of step S5, inhibitors and collectors are added once in the first and second concentrations, and the mixture is stirred for 2 to 3 minutes after the reagents are added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the inhibitors in the first and second concentrations are composed of sodium silicate and aminonaphthol sulfonic acid in a mass ratio of (2 to 4): 1, recorded as inhibitor Y1, with an amount of 300 to 600 g / t, and the amount of collector B1 is 100 to 150 g / t; the amount of inhibitor Y1 in the third and fourth concentrations is 200 to 400 g / t, no collector is added, the mixture is stirred for 2 to 3 minutes after the reagents are added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the fifth to eighth concentrations are blank flotation, and no inhibitors and collectors are added; the concentrates obtained from the first to eighth concentrations are used as the raw materials for the next concentration, and the tailings obtained are returned to the corresponding previous concentration in sequence.

[0023] Further, in step S6, the third roughing is followed by adding an adjusting agent, an inhibitor, and a collector, and each agent is stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 5 to 8 minutes; the adjusting agent used in the third roughing is hydrochloric acid, and the pH of the pulp is adjusted to 2 to 4; the inhibitor is acidified water glass, which is composed of sulfuric acid and sodium silicate in a mass ratio of (0.8 to 1): 1, and the dosage is 100 to 250 g / t; the collector includes hexadecyl trimethyl ammonium chloride (CTAC) and coconut amine, and the mass ratio of each component is hexadecyl trimethyl ammonium chloride: coconut amine = (3 to 5): 1, and this collector is recorded as B2 collector, and the dosage is 50 to 100 g / t;

[0024] Furthermore, in the four sweeps of step S6, the reagent is stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 5 to 8 minutes; in the first sweep, the adjusting agent and the collector are added in sequence, the adjusting agent used is hydrochloric acid, the pH of the slurry is adjusted to 2 to 4, and the amount of the collector B2 used is 10 to 20 g / t; in the second to fourth sweeps, only the collector is added, and the amount of the collector B2 used is 5 to 20 g / t; the first sweep uses the tailings of the third roughing as raw material, and the second to fourth sweeps use the tailings corresponding to the previous sweep as raw material;

[0025] The concentrates obtained from the third roughing and scavenging one to four are combined as muscovite products.

[0026] Principle of the present invention:

[0027] The present invention designs a comprehensive recovery and beneficiation process for a mica-type fluorite ore, and realizes the efficient and comprehensive utilization of the mineral resources. First, the raw ore is crushed to a suitable particle size, and then wet ball milling is performed to fully dissociate the useful minerals and gangue minerals in the ore; because biotite has weak magnetism, part of the biotite can be effectively separated by strong magnetic separation, reducing the amount of reagents used in the subsequent flotation process and reducing costs; at the same time, biotite has good floatability under alkaline conditions, and can float using only a small amount of pine oil as a collector, and the flotation foam product is combined with the above-mentioned magnetic separation product as a biotite product.

[0028] The collector used in fluorite flotation is composed of oxidized paraffin soap, sodium petroleum sulfonate and coconut amine. The oxidized paraffin soap and sodium petroleum sulfonate can effectively improve the collection ability and selectivity of fluorite. At the same time, the oxidized paraffin soap has a certain foaming property and no additional foaming agent is needed. Coconut amine plays an emulsifying role, which can make the agent fully dispersed in the slurry and promote the adsorption of the collector on the mineral surface.

[0029] The inhibitor used in fluorite flotation is composed of sodium silicate and aminonaphthol sulfonic acid. Sodium silicate has a good inhibitory effect on quartz, feldspar, etc., but has a poor inhibitory effect on topaz; while aminonaphthol sulfonic acid forms a chelate with Al in topaz through the amino and hydroxyl groups on the naphthalene ring, enhancing the hydrophilicity of the topaz surface and having a good inhibitory effect on it.

[0030] Acidified water glass is used as a gangue mineral inhibitor before muscovite flotation. On the one hand, it can maintain the acidic environment of the slurry. On the other hand, compared with ordinary water glass, it contains more strongly hydrophilic HSiO 3- Ions and H2SiO3 colloid can play a better inhibitory effect on gangue minerals by adjusting the dosage, while having little effect on the flotation of muscovite.

[0031] Beneficial effects of the present invention:

[0032] (1) The present invention designs a reasonable comprehensive recovery and beneficiation process according to the properties of a mica-type fluorite ore. Through crushing, grinding, magnetic separation, flotation and other processes, multiple products such as fluorite concentrate, biotite, muscovite and the like are obtained at the same time. The amount of tailings is small, and the efficient comprehensive utilization of mineral resources is realized, thereby improving economic and environmental benefits.

[0033] (2) The method of the present invention adopts a combined process of magnetic separation and flotation for biotite separation, which improves the recovery rate of biotite and reduces the dosage of reagents compared with single magnetic separation or flotation, which is beneficial to reducing costs and the subsequent separation of fluorite products and muscovite products;

[0034] (3) In the method of the present invention, a composite collector composed of oxidized paraffin soap, sodium petroleum sulfonate and coconut amine is used for the flotation of fluorite, which has both the capture and selectivity of fluorite. At the same time, coconut amine is used as an emulsifier to enhance the dispersion and dissolution of the reagent in the ore pulp, thereby improving the flotation effect of fluorite;

[0035] (4) In the method of the present invention, a composite collector composed of CTAC and coconut amine is used for the flotation of muscovite. Compared with traditional amine collectors, the composite collector has a small foaming amount, good selectivity, is less affected by temperature, and is easy to disperse and dissolve in the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The process flow diagram of the method of the present invention is shown in FIG. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, they will be described in detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0038] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0039] The process flow diagram of the method of the present invention is as follows Figure 1 The specific steps are shown in the embodiments.

[0040] Example 1

[0041] The raw ore used in this embodiment comes from a mine in Fujian Province, and the raw ore has a CaF2 content of 32.99%, a mica content of 53.4%, and the rest is gangue minerals such as feldspar and topaz. First, the raw ore is crushed to a particle size of less than 3 mm using a jaw crusher and a roller crusher, and then 600 g / t of sodium carbonate is added for wet ball milling, and the grinding concentration is 67%, and the content of the particle size less than 0.074 mm in the mineral particles is greater than 90%.

[0042] Use a high gradient magnetic separator to magnetically separate the pulp obtained by grinding, the magnetic field strength is set to 12000Gs, and the concentration of the magnetic separation pulp is 25%. After turning on the excitation, pour the pulp into the magnetic separator and obtain a non-magnetic product from the discharge port; after turning off the excitation, use water to flush out the magnetic product in the magnetic separator, and repeat the above process 3 times. The non-magnetic product is subjected to the first stage of biotite flotation (rough selection 1), and the flotation pulp concentration is controlled to be 30%. 400g / t of sodium carbonate (pH is 8.8), 2500g / t of sodium silicate, an inhibitor, and 100g / t of pine oil alcohol, a collector, are added in sequence, and the foam product obtained by flotation is combined with the above magnetic product as a biotite product.

[0043] The tailings of the first roughing process are subjected to the second stage of fluorite flotation, which consists of one roughing process (second roughing process) and eight fine processes, and the medium ore obtained from the fine processes is returned to the previous operation in sequence. The collector used in the second roughing process (denoted as B1) is composed of oxidized paraffin soap, sodium petroleum sulfonate, and coconut amine in a mass ratio of 80:20:1, with a total dosage of 500g / t; the inhibitor used in the first fine process (denoted as Y1) is composed of sodium silicate and aminonaphthol sulfonic acid in a mass ratio of 4:1, with a total dosage of 500g / t, and the dosage of collector B1 is 100g / t; the dosage of inhibitor Y1 in the second fine process is 300g / t, and the dosage of collector B1 is 40g / t; the dosage of inhibitor Y1 in the third fine process is 200g / t, and no collector is added; the dosage of inhibitor Y1 in the fourth fine process is 200g / t, and no collector is added; the fourth fine process to the eighth fine process are blank flotation, and no inhibitor and collector are added. The final concentrate is fluorite product.

[0044] The tailings of the second roughing are subjected to the third stage of muscovite flotation, which consists of a roughing (roughing three) and four cleanings. The adjusting agent used in the roughing three is hydrochloric acid, which adjusts the pulp pH to 2-4. The inhibitor used is acidified water glass, which is composed of sulfuric acid and sodium silicate in a mass ratio of 1:1, and the dosage is 200g / t. The collector used (denoted as B2) is composed of CTAC (i.e. hexadecyltrimethylammonium chloride) and coconut amine in a mass ratio of 4:1, and the dosage is 50g / t; no inhibitor is added from scavenging one to scavenging four, and the dosage of collector B2 is 10g / t. The roughing and each scavenging concentrate is used as muscovite products.

[0045] After testing, the CaF2 content of the fluorite concentrate product is 96.55%, and the recovery rate is 91.7%, which meets the requirements of the second-level fluorite concentrate; the purity of biotite is 93.3%, and the yield is 11.20%; the purity of muscovite is 95.8%, and the yield is 35.88%.

[0046] Example 2

[0047] The raw ore used in this embodiment comes from a mine in Fujian Province, and the raw ore has a CaF2 content of 33.67%, a mica content of 52.1%, and the rest is gangue minerals such as feldspar and topaz. First, the raw ore is crushed to a particle size of less than 3 mm using a jaw crusher and a roller crusher, and then 600 g / t of sodium carbonate is added for wet ball milling, and the grinding concentration is 67%, and the content of the particle size less than 0.074 mm in the mineral particles is greater than 90%.

[0048] Use a high gradient magnetic separator to magnetically separate the pulp obtained by grinding, the magnetic field strength is set to 8000Gs, and the concentration of the magnetic separation pulp is 25%. After turning on the excitation, pour the pulp into the magnetic separator and obtain a non-magnetic product from the discharge port; after turning off the excitation, use water to flush out the magnetic product in the magnetic separator, and repeat the above process 3 times. The non-magnetic product is subjected to the first stage of biotite flotation (rough selection 1), and the flotation pulp concentration is controlled to be 30%. Then, 400g / t of sodium carbonate (pH is 8.8), 2500g / t of sodium silicate, an inhibitor, and 100g / t of pine oil alcohol, a collector, are added in sequence. The foam product obtained by flotation is combined with the above magnetic product as a biotite product.

[0049] The tailings of the first roughing process are subjected to the second stage of fluorite flotation, which consists of one roughing process (second roughing process) and eight fine processes, and the fines obtained from the fine processes are returned to the previous process in sequence. The collector used in the second roughing process (referred to as B1) is composed of oxidized paraffin soap, sodium petroleum sulfonate, and coconut amine in a mass ratio of 80:20:1, with a total dosage of 300g / t; the inhibitor used in the first fine process (referred to as Y1) is composed of sodium silicate and aminonaphthol sulfonic acid in a mass ratio of 4:1, with a total dosage of 500g / t, and the dosage of collector B1 is 100g / t; the dosage of inhibitor Y1 in the second fine process is 300g / t, and the dosage of collector B1 is 40g / t; the dosage of inhibitor Y1 in the third fine process is 200g / t, and no collector is added; the dosage of inhibitor Y1 in the fourth fine process is 200g / t, and no collector is added; the fourth fine process to the eighth fine process are blank flotation, and no inhibitor and collector are added. The final concentrate is fluorite product.

[0050] The tailings of the second roughing are subjected to the third stage of muscovite flotation, which consists of a roughing (roughing three) and four cleanings. The adjusting agent used in the roughing three is hydrochloric acid, which adjusts the pulp pH to 2-4. The inhibitor used is acidified water glass, which is composed of sulfuric acid and sodium silicate in a mass ratio of 1:1, and the dosage is 200g / t. The collector used (denoted as B2) is composed of CTAC (i.e. hexadecyltrimethylammonium chloride) and coconut amine in a mass ratio of 4:1, and the dosage is 50g / t; no inhibitor is added from scavenging one to scavenging four, and the dosage of collector B2 is 10g / t. The roughing and each scavenging concentrate is used as muscovite products.

[0051] After testing, the CaF2 content of the fluorite concentrate product is 96.78%, and the recovery rate is 89.3%, which meets the requirements of the second-level fluorite concentrate; the purity of biotite is 93.2%, and the yield is 10.65%; the purity of muscovite is 95.6%, and the yield is 36.82%.

[0052] Comparative Example 1

[0053] Compared with Example 1, only roughing step 2 and cleaning steps 1 to 8 are provided after grinding, that is, only fluorite flotation is performed, and the flotation steps and conditions are exactly the same as those of the corresponding parts of Example 1.

[0054] After testing, the CaF2 content of the fluorite concentrate product was 93.26%, and the recovery rate was 90.2%, which could only meet the requirements of the fourth grade of fluorite concentrate; the mica content in the tailings was only 74.9%, which failed to meet the raw material standards for ceramics, rubber and other products.

[0055] Comparative Example 2

[0056] Compared with Example 1, except that the collector B1 is replaced by sodium oleate, the other steps and conditions are exactly the same as those of Example 1. That is, only sodium oleate is used to replace the collector B1, and the total amount remains unchanged.

[0057] After testing, the CaF2 content of fluorite concentrate was 91.14%, and the recovery rate was 85.9%, which failed to meet the requirements of fluorite concentrate. The purity of biotite was 93.2%, and the yield was 11.35%; the purity of muscovite was 93.2%, and the yield was 26.71%.

[0058] Comparative Example 3

[0059] Compared with Example 1, except that the inhibitor Y1 is replaced by sodium silicate, the other steps and conditions are exactly the same as those of Example 1. That is, only sodium silicate is used to replace the inhibitor Y1, and the total amount remains unchanged.

[0060] After testing, the CaF2 content of the fluorite concentrate product is 93.37%, and the recovery rate is 91.9%, which can only meet the requirements of the fourth grade of fluorite concentrate; the purity of biotite is 92.9%, and the yield is 11.98%; the purity of muscovite is 94.8%, and the yield is 35.68%.

[0061] According to the national standard for fluorite concentrate, the minimum grade requirement is 93%, and each subsequent grade difference of 1-2% is a grade difference. Therefore, it can be seen from the results of the above embodiments and comparative examples that the conventional fluorite beneficiation process and flotation reagent have poor separation effects on this type of mica-type fluorite, and a large amount of tailings will be generated. The present invention improves the traditional fluorite flotation process and reagent, and can obtain by-products such as biotite and muscovite while obtaining qualified fluorite concentrate products, thereby reducing the amount of tailings and realizing the efficient and comprehensive utilization of mineral resources.

Claims

1. A comprehensive recovery and beneficiation method for mica-type fluorite, characterized in that: The following steps are involved: S1. crushing and ball-milling the mica-type fluorite ore to obtain a ball-milled product; S2. The ball-milled product obtained in step S1 is slurried and magnetically separated to obtain a magnetic product and a non-magnetic product; S3. The non-magnetic product obtained in step S2 is subjected to a first roughing flotation to obtain a roughing concentrate 1 and a roughing tailing 1; the roughing concentrate 1 and the magnetic product obtained in step S2 are combined as a biotite product; S4. The roughing tailings 1 obtained in step S3 are subjected to a second roughing flotation to obtain a roughing concentrate 2 and a roughing tailings 2; S5. The rougher concentrate 2 obtained in step S4 is subjected to eight rounds of concentrating to obtain a fluorite concentrate; S6. The roughing tailings 2 obtained in step S4 are subjected to a third roughing flotation and a fourth scavenging to obtain a muscovite product.

2. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In step S1, the fluorite grade in the mica-type fluorite ore is 20% to 40%, the muscovite content is 30% to 40%, and the biotite content is 10% to 15%; the crushing includes three stages: coarse crushing, medium crushing, and fine crushing, wherein the coarse crushing and medium crushing use a jaw crusher, and the fine crushing uses a double-roll crusher, and the final crushed product particle size is less than 3 mm.

3. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In step S1, the ball milling is wet ball milling, the grinding concentration is 60% to 70%, and sodium carbonate is added as a grinding aid in an amount of 400 to 600 g / t, and the particle size below 0.074 mm accounts for 80% to 95% of the ball milled product.

4. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In step S2, the ball milled product is slurried to a pulp concentration of 20% to 30%, and the magnetic field strength of the magnetic separation is 10000 to 14000 Gs.

5. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In steps S3 to S6, the mass concentration of solid particles in the flotation slurry is 25% to 35%, and the pH is adjusted to 8 to 9.

6. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In step S3, the first rough selection sequentially adds the adjusting agent, the inhibitor and the collector, and each agent is stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the adjusting agent used in the first rough selection is sodium carbonate, and the amount is 400 to 600 g / t; the inhibitor is sodium silicate, and the amount is 2200 to 2500 g / t; the collector is pine oil, and the amount is 80 to 120 g / t.

7. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1 is characterized in that: In step S4, only the collector is added in the second roughing, and the mixture is stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the collector used in the second roughing includes oxidized paraffin soap, sodium petroleum sulfonate, and coconut amine, and the mass ratio of each component is oxidized paraffin soap: sodium petroleum sulfonate: coconut amine = (80 to 100): (15 to 30):

1. This collector is recorded as B1 collector, and the dosage is 450 to 550 g / t.

8. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 7 is characterized in that: In the eight concentrations of step S5, inhibitors and collectors are added once in the first and second concentrations, and the reagents are stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the inhibitors in the first and second concentrations are composed of sodium silicate and aminonaphthol sulfonic acid in a mass ratio of (2 to 4): 1, recorded as inhibitor Y1, with an amount of 300 to 600 g / t, and the amount of collector B1 is 100 to 150 g / t; the amount of inhibitor Y1 in the third and fourth concentrations is 200 to 400 g / t, no collector is added, the reagents are stirred for 2 to 3 minutes after being added, the aeration time is 1 to 2 minutes, and the scraping time is 3 to 5 minutes; the fifth to eighth concentrations are blank flotation, and no inhibitors and collectors are added; the concentrates obtained from the first to eighth concentrations are used as the raw materials for the next concentration, and the tailings obtained are returned to the corresponding previous concentration in sequence.

9. The comprehensive recovery and beneficiation method for mica-type fluorite according to claim 1, characterized in that: In step S6, the third roughing is followed by adding an adjusting agent, an inhibitor, and a collector. After each agent is added, it is stirred for 2 to 3 minutes, the aeration time is 1 to 2 minutes, and the scraping time is 5 to 8 minutes. The adjusting agent used in the third roughing is hydrochloric acid, and the pH of the pulp is adjusted to 2 to 4. The inhibitor is acidified water glass, which is composed of sulfuric acid and sodium silicate in a mass ratio of (0.8 to 1): 1, and the dosage is 100 to 250 g / t. The collector includes hexadecyl trimethyl ammonium chloride (CTAC) and coconut amine, and the mass ratio of each component is hexadecyl trimethyl ammonium chloride: coconut amine = (3 to 5):

1. This collector is recorded as B2 collector, and the dosage is 50 to 100 g / t.

10. The comprehensive recovery and beneficiation method of mica-type fluorite according to claim 9, characterized in that: In the four sweeps of step S6, the reagent is added and stirred for 2 to 3 minutes, the aeration time is 1 to 2 minutes, and the scraping time is 5 to 8 minutes; in the first sweep, the adjusting agent and the collector are added in sequence, the adjusting agent used is hydrochloric acid, the pH of the slurry is adjusted to 2 to 4, and the amount of the collector B2 used is 10 to 20 g / t; in the second to fourth sweeps, only the collector is added, and the amount of the collector B2 used is 5 to 20 g / t; the first sweep uses the tailings of the third roughing as raw material, and the second to fourth sweeps use the tailings corresponding to the previous sweep as raw material; The concentrates obtained from the third roughing and scavenging one to four are combined as muscovite products.

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