Beneficiation method of high calcite type fluorite ore

Abstract

The application provides a high calcite type fluorite ore dressing method, and belongs to the field of ore flotation. The high calcite type fluorite ore is added with a special high selectivity fluorite collector CK-1 and calcite inhibitor CD-8, and is combined with soda ash, acidified water glass reagent and roughing-scavenging-cleaning process, so that the current situation that the fluorite recovery rate and grade are in a low range due to the difficulty in separation of fluorite and calcite with similar properties in the flotation process is solved. The special collector CK-1 is chemically adsorbed on the surface of Ca ions, and the collector can significantly reduce the adsorption amount on the surface of calcite. The inhibitor CD-8 is chemically adsorbed on the surface of calcite, and a hydrophilic film is formed on the surface of calcite to hinder the adsorption of hydrophobic collectors, so that the inhibition of calcite is realized. The synergistic effect of the combined reagent strengthens the selective inhibition ability of the high calcite type fluorite ore.

Description

Technical Field

[0001] This invention relates to the field of ore flotation technology, specifically to a method for beneficiating high calcite-type fluorite ore. Background Technology

[0002] Fluorite is a strategically important non-metallic mineral resource with applications spanning traditional and emerging industries such as metallurgy, chemicals, building materials, ceramics, aviation, refrigeration, pharmaceuticals, nuclear energy, and fluorochemicals. In recent years, the demand for fluorite has been increasing due to the growing demand from industries such as new energy, new materials, and fluorochemicals. my country possesses abundant reserves of associated and co-occurring fluorite resources, with enormous potential for development and utilization. However, this type of ore has a low fluorite content and complex properties. Besides quartz, the main gangue minerals include calcite (CaCO3), celestite (SrSO4), and barite (BaSO4). Calcite (CaCO3) and fluorite (CaF2) are closely associated and share very similar properties, making separation difficult. Furthermore, the higher the calcite content, the harder it is to obtain high-grade fluorite products. Existing technologies commonly use calcite inhibitors such as acidified water glass, tannin, maltodextrin, and carboxymethyl cellulose, which have some inhibitory effect on calcite, but none can effectively separate fluorite from calcite. The patent with publication number CN103706485B provides a beneficiation method for high-calcium carbonate fluorite ore. This method uses tannic acid as an inhibitor, but this reagent is expensive and difficult to apply industrially. In addition, the acid leaching process using hydrofluoric acid is relatively dangerous and difficult to operate in actual production.

[0003] In view of this, it is necessary to design a beneficiation method for high calcite-type fluorite ore to solve the above problems. Summary of the Invention

[0004] In view of the technical problems existing in the background art, this application provides a beneficiation method for high calcite-type fluorite ore, which aims to solve the technical problem that it is not easy to separate carbonate minerals from fluorite ore resources in low-grade fluorite ore containing high-grade carbonate minerals.

[0005] This application provides a method for beneficiating high-calcite fluorite ore, including the following steps:

[0006] S1. After crushing the target ore, it is then made into a slurry;

[0007] S2. The slurry is subjected to roughing, scavenging and cleaning operations to finally obtain fluorite concentrate;

[0008] The reagents added during the roughing process include: alkali, acidified water glass, inhibitor CD-8, and collector CK-1;

[0009] The reagents added during scavenging include acidified water glass and collector CK-1;

[0010] The agents added during the selection process include one or more of the inhibitor CD-8 and acidified water glass;

[0011] The collector CK-1 includes two or more of the following: alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid.

[0012] The inhibitor CD-8 includes two or more of hydroxypropyl starch, propylene glycol alginate, and locust bean gum.

[0013] In the technical solution of this application embodiment, by adding a specially formulated highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 to high-calcite fluorite ore, and combining it with soda ash, acidified water glass reagents, and a roughing-scavenging-cleaning process, the problem of low fluorite recovery rate and grade due to the difficulty in separating calcite and fluorite during flotation is solved. Specifically, the specially formulated collector CK-1 chemically adsorbs strongly onto the surface of Ca ions. Compared to traditional collectors, this collector significantly reduces the amount adsorbed on the calcite surface, thus enhancing the difference in floatability between fluorite and calcite and reducing reagent costs. The inhibitor CD-8 chemically adsorbs onto the calcite surface and forms a hydrophilic film on the calcite surface, which can hinder the adsorption of hydrophobic collectors, thereby inhibiting calcite and enhancing the selective inhibition ability for high-calcite fluorite ore.

[0014] In some embodiments, the mass ratio of alpha-linolenic acid to arachidonic acid in the collector CK-1 is 15–30:20–40; or

[0015] The mass ratio of alpha-linolenic acid to eicosapentaenoic acid in the harvester CK-1 is 15-30:30-55; or

[0016] The mass ratio of arachidonic acid to docosapentaenoic acid in the collector CK-1 is 20-40:30-55; or

[0017] The mass ratio of alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid in the collector CK-1 is 15–30:20–40:30–55; and / or

[0018] The mass ratio of hydroxypropyl starch to propylene glycol alginate in the inhibitor CD-8 is 20–40:20–40; or

[0019] The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20-40:20-40.

[0020] The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20–40:20–40; or

[0021] The mass ratio of hydroxypropyl starch, propylene glycol alginate, and locust bean in the inhibitor CD-8 is 20–40:20–40:20–40.

[0022] In some embodiments, the pH value of the acidified water glass ranges from 1 to 2.

[0023] In some embodiments, the alkali includes soda ash; during roughing, the amount of soda ash used is 800-1200 g / t, the amount of acidified water glass used is 800-1200 g / t, the amount of inhibitor CD-8 used is 300-700 g / t, and the amount of collector CK-1 used is 300-700 g / t.

[0024] In some embodiments, scavenging includes scavenging I and scavenging II; when performing scavenging I, the amount of acidified water glass is 300-700 g / t, and the amount of collector CK-1 is 30-70 g / t; when performing scavenging II, the amount of acidified water glass is 200-300 g / t, and the amount of collector CK-1 is 20-30 g / t.

[0025] In some embodiments, the selection process includes selection I, selection II, selection III, selection IV, selection V, selection VI, and selection VII; the reagents added during selection I include the inhibitor CD-8 and acidified water glass; the dosage of the inhibitor CD-8 during selection I is 200-300 g / t, and the dosage of acidified water glass is 700-900 g / t; the reagents added during selection II, selection III, selection IV, selection V, and selection VI include acidified water glass; the dosages of acidified water glass added during selection II, selection III, selection IV, selection V, and selection VI are 600-700 g / t, 450-550 g / t, 300-400 g / t, 100-200 g / t, and 60-100 g / t, respectively.

[0026] In some embodiments, the high calcite-type fluorite ore beneficiation method further includes: concentrating, re-selecting, and finely scavenging the middlings I obtained from fine selection I and the middlings II obtained from fine selection II.

[0027] In some embodiments, the reagents added during the re-selection I of middlings I include acidified water glass and collector CK-1; the amount of acidified water glass used during the re-selection I of middlings I is 200-700 g / t, and the amount of collector CK-1 used is 10-30 g / t; the reagents added during the fine scavenging I of middlings I include acidified water glass and collector CK-1; the amount of acidified water glass used during the fine scavenging I of middlings I is 300-400 g / t, and the amount of collector CK-1 used is 5-10 g / t.

[0028] In some embodiments, the reagents added during the secondary beneficiation of middlings II include acidified water glass and collector CK-1; the amount of acidified water glass used during the secondary beneficiation of middlings II is 300-400 g / t, and the amount of collector CK-1 used is 10-30 g / t; the reagents added during the scavenging and cleaning of middlings II include acidified water glass and collector CK-1; the amount of acidified water glass used during the scavenging and cleaning of middlings II is 100-200 g / t, and the amount of collector CK-1 used is 5-10 g / t.

[0029] In some embodiments, the concentration of middlings I is 18-22%; the concentration of middlings II is 18-22%; and the concentration of the slurry prepared in step S1 is 30-35%.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0032] Figure 1 This is a flowchart of the beneficiation method for high calcite-type fluorite ore in the embodiments of this application. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] 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 application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0038] In existing technologies, tannic acid is used as a depressant and oleic acid as a collector in the flotation of high-calcium carbonate fluorite ores. However, tannic acid is expensive and difficult to use industrially, and the flotation process requires acid leaching with hydrofluoric acid, which is a dangerous process and difficult to operate in actual production. Furthermore, oleic acid has poor selectivity, making it difficult to separate fluorite from calcite. Therefore, it is particularly important to provide a separation method that can efficiently recover fluorite concentrate from low-grade fluorite ores containing high carbonate mineral content while controlling reagent costs.

[0039] To address the aforementioned technical problems, this application provides a beneficiation method for high-calcite fluorite ore. In this method, a specially formulated highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 are added to the high-calcite fluorite ore, along with soda ash, acidified water glass reagents, and a roughing-scavenging-cleaning process to achieve effective separation of calcite and fluorite, thereby ensuring the effective recovery of subsequent fluorite concentrate.

[0040] This application provides a method for beneficiating high-calcite fluorite ore, including the following steps:

[0041] S1. After crushing the target ore, it is then made into a slurry with a concentration of 30-35%.

[0042] S2. The slurry is subjected to roughing, scavenging and cleaning operations to finally obtain fluorite concentrate;

[0043] The reagents added during roughing include: alkali, acidified water glass, inhibitor CD-8, and collector CK-1;

[0044] The mass ratio of alpha-linolenic acid to arachidonic acid in the harvester CK-1 is 15-30:20-40; or

[0045] The mass ratio of alpha-linolenic acid to eicosapentaenoic acid in the harvester CK-1 is 15-30:30-55; or

[0046] The mass ratio of arachidonic acid to docosapentaenoic acid in the collector CK-1 is 20-40:30-55; or

[0047] The mass ratio of alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid in the collector CK-1 is 15–30:20–40:30–55; and / or

[0048] The mass ratio of hydroxypropyl starch to propylene glycol alginate in the inhibitor CD-8 is 20–40:20–40; or

[0049] The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20-40:20-40.

[0050] The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20–40:20–40; or

[0051] The mass ratio of hydroxypropyl starch, propylene glycol alginate, and locust bean in the inhibitor CD-8 is 20-40:20-40:20-40;

[0052] The alkali includes soda ash and sodium hydroxide; during roughing, the amount of soda ash used is 800-1200 g / t, the amount of acidified water glass used is 800-1200 g / t, the amount of inhibitor CD-8 used is 300-700 g / t, and the amount of collector CK-1 used is 300-700 g / t.

[0053] The reagents added during scavenging include acidified water glass and collector CK-1. During scavenging I, the dosage of acidified water glass is 300-700 g / t, and the dosage of collector CK-1 is 30-70 g / t. During scavenging II, the dosage of acidified water glass is 200-300 g / t, and the dosage of collector CK-1 is 20-30 g / t.

[0054] The selection process includes selection I, selection II, selection III, selection IV, selection V, selection VI, and selection VII. The reagents added during selection I include the inhibitor CD-8 and acidified water glass. The dosage of the inhibitor CD-8 during selection I is 200-300 g / t, and the dosage of acidified water glass is 700-900 g / t.

[0055] The reagents added during the purification processes II, III, IV, V, and VI include acidified water glass; the dosages of acidified water glass added during purification processes II, III, IV, V, and VI are 600–700 g / t, 450–550 g / t, 300–400 g / t, 100–200 g / t, and 60–100 g / t, respectively.

[0056] The collector CK-1 includes two or more of the following: alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid.

[0057] The inhibitor CD-8 includes two or more of hydroxypropyl starch, propylene glycol alginate, and locust bean gum.

[0058] Each flotation process takes 2 to 3 minutes.

[0059] By adding a specially formulated, highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 to high-calcite fluorite ore, along with soda ash, acidified water glass reagents, and a roughing-scavenging-cleaning process, the problem of low fluorite recovery and grade due to the difficulty in separating calcite and fluorite caused by their extremely similar properties during flotation was solved. The specially formulated collector CK-1 chemically adsorbs onto the surface of Ca ions. Compared to traditional collectors, this collector significantly reduces the amount adsorbed on the calcite surface, thus exhibiting good selectivity for calcite, enhancing the difference in floatability between fluorite and calcite, and reducing reagent costs. The inhibitor CD-8 chemically adsorbs onto the calcite surface and forms a hydrophilic film, hindering the adsorption of hydrophobic collectors and thus inhibiting calcite adsorption. This enhances the selective inhibition capability for high-calcite fluorite ore, which is beneficial for improving the grade of the final phosphate concentrate.

[0060] Furthermore, in some embodiments, the pH value of the acidified water glass is in the range of 1 to 2.

[0061] Furthermore, in some embodiments, the high calcite-type fluorite ore beneficiation method further includes: concentrating, re-selecting, and finely scavenging the middlings I obtained from fine selection I and the middlings II obtained from fine selection II;

[0062] The concentration of intermediate ore I is 18-22%; the concentration of intermediate ore II is 18-22%.

[0063] The reagents added during the re-selection I of middlings I include acidified water glass and collector CK-1; the dosage of acidified water glass during the re-selection I of middlings I is 200-700 g / t, and the dosage of collector CK-1 is 10-30 g / t; the reagents added during the fine scavenging I of middlings I include acidified water glass and collector CK-1; the dosage of acidified water glass during the fine scavenging I of middlings I is 300-400 g / t, and the dosage of collector CK-1 is 5-10 g / t;

[0064] The reagents added during the secondary beneficiation of middlings II include acidified water glass and collector CK-1; the dosage of acidified water glass during secondary beneficiation of middlings II is 300-400 g / t, and the dosage of collector CK-1 is 10-30 g / t; the reagents added during the secondary beneficiation of middlings II include acidified water glass and collector CK-1; the dosage of acidified water glass during secondary beneficiation of middlings II is 100-200 g / t, and the dosage of collector CK-1 is 5-10 g / t.

[0065] By concentrating, re-selecting, and finely scavenging the middlings obtained from the beneficiation process, and by further processing it with appropriate acidified water glass and collector CK-1, fluorite in the ore can be fully floated out, reducing resource waste.

[0066] In the technical solution of this application embodiment, collector CK-1, inhibitor CD-8, soda ash, and acidified water glass are added to the roughing-scavenging-cleaning process of low-grade fluorite ore to enhance the collecting effect of fluorite and the inhibition effect of calcite, thereby achieving effective separation of calcite and fluorite. This is beneficial to obtaining high-grade fluorite concentrate in the end.

[0067] The following are some specific embodiments. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0068] Using a high-calcium carbonate fluorite deposit in Xinjiang as an example, the main ore components in the ore sample were CaCO3 and CaF2, with SiO2 as a secondary component. Calcium in the ore was mainly found in fluorite and calcite, with a small amount found in other minerals. The calcium content in fluorite was approximately 18.66%, with a distribution rate of 45.32%; the calcium content in calcite was approximately 22.35%, with a distribution rate of 54.29%.

[0069] Example 1

[0070] like Figure 1 As shown, Example 1 provides a beneficiation method for high calcite-type fluorite ore, comprising the following steps:

[0071] S1. After crushing the target raw ore to a particle size of -0.074mm, 70% of it is then made into a slurry with a concentration of 33%.

[0072] S2. The slurry is subjected to one roughing, two scavenging, and seven cleaning operations to finally obtain fluorite concentrate; wherein, the two scavenging operations include scavenging I and scavenging II; the seven cleaning operations include cleaning I, cleaning II, cleaning III, cleaning IV, cleaning V, cleaning VI, and cleaning VII; the middlings I obtained from cleaning I and the middlings II obtained from cleaning II are then subjected to concentration, re-selection, and fine scavenging operations respectively;

[0073] The reagents added during the roughing operation include: 1000 g / t of soda ash, 1000 g / t of acidified water glass, 500 g / t of inhibitor CD-8, and 500 g / t of collector CK-1; the roughing time is 3 minutes.

[0074] The reagents added during scavenging I include 500 g / t of acidified water glass and 50 g / t of collector CK-1; during scavenging II, the dosage of acidified water glass is 250 g / t and the dosage of collector CK-1 is 25 g / t; the scavenging time for each scavenging is 2 min.

[0075] The reagents added during the first selection process included 250 g / t of CD-8 inhibitor and 833 g / t of acidified water glass; the first selection process lasted 2.5 minutes.

[0076] The reagents added during the purification processes II, III, IV, V, and VI included acidified water glass; the amounts of acidified water glass added during purification processes II, III, IV, V, and VI were 667 g / t, 500 g / t, 334 g / t, 167 g / t, and 84 g / t, respectively; and the purification time for each of the purification processes II, III, IV, V, and VI was 2 minutes.

[0077] The concentration of intermediate ore I after concentration is 31%; the concentration of intermediate ore II after concentration is 30%.

[0078] The reagents added during the re-selection I of the middlings I include 500 g / t of acidified water glass and 21 g / t of collector CK-1; the reagents added during the fine scavenging I of the middlings I include 334 g / t of acidified water glass and 7 g / t of collector CK-1.

[0079] The reagents added during the re-selection of middlings II include 334 g / t of acidified water glass and 21 g / t of collector CK-1; the reagents added during the fine scavenging of middlings II include 167 g / t of acidified water glass and 7 g / t of collector CK-1.

[0080] In this embodiment, the collector CK-1 is composed of alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid in a mass ratio of 15:30:55.

[0081] The inhibitor CD-8 is composed of hydroxypropyl starch, propylene glycol alginate, and locust bean gum in a mass ratio of 20:40:40.

[0082] The final fluorite concentrate had a CaF2 grade of 98.34% and a recovery rate as high as 84.36%.

[0083] Example 2

[0084] Example 2 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the collector CK-1 used is composed of alpha-linolenic acid and arachidonic acid in a mass ratio of 15:30. The remaining steps are the same as in Example 1 and will not be repeated here.

[0085] Example 3

[0086] Example 3 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the collector CK-1 used is composed of alpha-linolenic acid and eicosapentaenoic acid in a mass ratio of 15:55. The remaining steps are the same as in Example 1 and will not be repeated here.

[0087] Example 4

[0088] Example 4 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the collector CK-1 used is composed of arachidonic acid and docosapentaenoic acid in a mass ratio of 30:55. The remaining steps are the same as in Example 1 and will not be repeated here.

[0089] Example 5

[0090] Example 5 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the inhibitor CD-8 used is composed of hydroxypropyl starch and propylene glycol alginate in a mass ratio of 20:40. The remaining steps are the same as in Example 1 and will not be repeated here.

[0091] Example 6

[0092] Example 6 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the inhibitor CD-8 used is composed of hydroxypropyl starch and locust bean gum in a mass ratio of 20:40. The remaining steps are the same as in Example 1 and will not be repeated here.

[0093] Example 7

[0094] Example 7 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the inhibitor CD-8 used is composed of propylene glycol alginate and locust bean gum in a mass ratio of 40:40. The remaining steps are the same as in Example 1 and will not be repeated here.

[0095] Comparative Example 1

[0096] Comparative Example 1 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the collector CK-1 is replaced with oleic acid. The remaining steps are the same as in Example 1 and will not be repeated here.

[0097] Comparative Example 2

[0098] Comparative Example 2 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the collector CK-1 used is composed of alpha-linolenic acid. The remaining steps are the same as in Example 1 and will not be repeated here.

[0099] Comparative Example 3

[0100] Comparative Example 3 provides a beneficiation method for high-calcite fluorite ore, which differs from Example 1 in that the inhibitor CD-8 is replaced with tannin. All other steps are the same as in Example 1 and will not be repeated here.

[0101] Comparative Example 4

[0102] Comparative Example 4 provides a beneficiation method for high-calcite fluorite ore, which differs from Example 1 in that the inhibitor CD-8 is replaced with calcium lignosulfonate. The remaining steps are the same as in Example 1 and will not be repeated here.

[0103] Comparative Example 5

[0104] Comparative Example 5 provides a beneficiation method for high calcite-type fluorite ore, which differs from Example 1 in that the inhibitor CD-8 is replaced with carboxymethyl cellulose. The remaining steps are the same as in Example 1 and will not be repeated here.

[0105] Comparative Example 6

[0106] Comparative Example 6 provides a beneficiation method for high calcite-type fluorite ore. The difference from Example 1 is that the inhibitor CD-8 used is composed of hydroxypropyl starch. The remaining steps are the same as in Example 1 and will not be repeated here.

[0107] Comparative Example 7

[0108] Comparative Example 7 provides a beneficiation method for high-calcite fluorite ore. The difference between this method and Example 1 is that the experimental process uses a flotation operation with a sequence of one roughing, two scavenging, and seven cleaning stages. The remaining steps are the same as in Example 1 and will not be repeated here.

[0109] The specific flotation results of Examples 1-7 and Comparative Examples 1-7 are shown in Table 1.

[0110] Table 1. Beneficiation and separation results of high calcite-type fluorite ore in Examples 1-9 and Comparative Examples 1-7.

[0111]

[0112]

[0113] As shown in Table 1, the beneficiation method for high-calcite fluorite ore provided in this application involves adding a specially formulated highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 to the high-calcite fluorite ore, and combining this with a roughing-scavenging-cleaning process and a re-cleaning-scavenging process for the middlings. The collector CK-1 includes two or more of the following: alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid; the inhibitor CD-8 includes hydroxypropyl starch, propylene glycol alginate, and arsenic trioxide. By using two or more of the locust bean gum, a fluorite concentrate with a CaF2 content of over 94.57% can be obtained, with a recovery rate of over 83.25%. Furthermore, when the collector CK-1 is composed of alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid, and the inhibitor CD-8 is composed of hydroxypropyl starch, propylene glycol alginate, and locust bean gum, a fluorite concentrate with a CaF2 content of up to 98.34% can be obtained, with a recovery rate of up to 84.36%.

[0114] In summary, the beneficiation method for high-calcite fluorite ore provided by this invention solves the problem of low fluorite recovery and grade caused by the difficulty in separating calcite and fluorite due to their similar properties during flotation. This is achieved by adding a specially formulated high-selectivity fluorite collector CK-1 and a calcite inhibitor CD-8 to the high-calcite fluorite ore, along with soda ash, acidified water glass reagents, and a roughing-scavenging-cleaning process. The specially formulated collector CK-1 chemically adsorbs onto the surface of Ca ions. Compared to traditional collectors, this collector significantly reduces the amount adsorbed on the calcite surface, thus enhancing the difference in floatability between fluorite and calcite and reducing reagent costs. The inhibitor CD-8 chemically adsorbs onto the calcite surface and forms a hydrophilic film on the calcite surface, hindering the adsorption of the collector and thus inhibiting calcite adsorption. This synergistic effect of the combined reagents enhances the selective inhibition capability for high-calcite fluorite ore.

[0115] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A beneficiation method for high-calcite type fluorite ore, characterized in that, Includes the following steps: S1. After crushing the target ore, it is then made into a slurry; S2. The slurry is subjected to roughing, scavenging and cleaning operations to finally obtain fluorite concentrate; The reagents added during roughing include: alkali, acidified water glass, inhibitor CD-8, and collector CK-1; The reagents added during scavenging include acidified water glass and collector CK-1; The agents added during the selection process include one or more of the inhibitor CD-8 and acidified water glass; The collector CK-1 includes two or more of the following: alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid. The CD-8 inhibitor includes hydroxypropyl starch, propylene glycol alginate, and locust bean gum; The mass ratio of alpha-linolenic acid to arachidonic acid in the collector CK-1 is 15~30:20~40; or The mass ratio of alpha-linolenic acid to eicosapentaenoic acid in the harvester CK-1 is 15~30:30~55; or The mass ratio of arachidonic acid to docosapentaenoic acid in the collector CK-1 is 20~40:30~55; or The mass ratio of alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid in the collector CK-1 is 15~30:20~40:30~55; The mass ratio of hydroxypropyl starch, propylene glycol alginate, and locust bean in the inhibitor CD-8 is 20~40:20~40:20~40.

2. The beneficiation method for high calcite-type fluorite ore according to claim 1, characterized in that, The pH range of acidified water glass is 1 to 2.

3. The beneficiation method for high calcite-type fluorite ore according to claim 2, characterized in that, The alkali includes soda ash; during roughing, the amount of soda ash used is 800~1200g / t, the amount of acidified water glass used is 800~1200g / t, the amount of inhibitor CD-8 used is 300~700g / t, and the amount of collector CK-1 used is 300~700g / t.

4. The beneficiation method for high calcite-type fluorite ore according to claim 2, characterized in that, The scavenging process includes scavenging I and scavenging II. When performing scavenging I, the amount of acidified water glass used is 300~700 g / t, and the amount of collector CK-1 used is 30~70 g / t. When performing scavenging II, the amount of acidified water glass used is 200~300 g / t, and the amount of collector CK-1 used is 20~30 g / t.

5. The beneficiation method for high calcite-type fluorite ore according to claim 2, characterized in that, The selection process includes Selection I, Selection II, Selection III, Selection IV, Selection V, Selection VI, and Selection VII. The reagents added during Selection I include the inhibitor CD-8 and acidified water glass. The dosage of the inhibitor CD-8 during Selection I is 200-300 g / t, and the dosage of acidified water glass is 700-900 g / t. The reagents added during Selection II, Selection III, Selection IV, Selection V, and Selection VI include acidified water glass. The dosages of acidified water glass added during Selection II, Selection III, Selection IV, Selection V, and Selection VI are 600-700 g / t, 450-550 g / t, 300-400 g / t, 100-200 g / t, and 60-100 g / t, respectively.

6. The beneficiation method for high calcite-type fluorite ore according to claim 5, characterized in that, Also includes: The middlings I obtained from Selective Selection I and the middlings II obtained from Selective Selection II are then concentrated, re-selected, and finely scavenged.

7. The beneficiation method for high calcite-type fluorite ore according to claim 6, characterized in that, The reagents added during the re-selection of the middle ore I include acidified water glass and collector CK-1; When the middlings I undergoes re-selection I, the amount of acidified water glass used is 200~700g / t, and the amount of collector CK-1 used is 10~30g / t; when the middlings I undergoes fine scavenging I, the reagents added include acidified water glass and collector CK-1. When the middlings I undergoes fine scavenging I, the amount of acidified water glass used is 300~400g / t, and the amount of collector CK-1 used is 5~10g / t.

8. The beneficiation method for high calcite-type fluorite ore according to claim 6, characterized in that, The reagents added during the re-selection of the middle ore II include acidified water glass and collector CK-1; When the middlings II undergoes re-selection II, the amount of acidified water glass used is 300~400g / t, and the amount of collector CK-1 used is 10~30g / t; when the middlings II undergoes fine scavenging II, the reagents added include acidified water glass and collector CK-1. When the middlings II undergoes fine scavenging II, the amount of acidified water glass used is 100~200g / t, and the amount of collector CK-1 used is 5~10g / t.

9. The beneficiation method for high calcite-type fluorite ore according to claim 6, characterized in that, The concentration of the intermediate ore I is 18-22%; the concentration of the intermediate ore II is 18-22%; and the concentration of the slurry prepared in step S1 is 30-35%.

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