Beneficiation method for high calcite type fluorite ore

Abstract

The invention provides a beneficiation method for high-calcite type fluorite ore, and belongs to the field of ore flotation. The high-calcite type fluorite ore is added with a specially-made high-selectivity fluorite collecting agent CK-1 and a calcite inhibitor CD-8, sodium carbonate and an acidified sodium silicate reagent are matched, and the technological process of roughing, scavenging and concentration is conducted; the current situation that the recovery rate and the grade of fluorite are both in a lower range due to the fact that calcite and fluorite have similar properties and are difficult to separate in the flotation process is solved. Wherein the adopted special collecting agent CK-1 is adsorbed on the surface of Ca ions in a chemical mode, and the adsorbing amount of the collecting agent on the surface of calcite can be remarkably reduced; the adopted inhibitor CD-8 is adsorbed on the surface of the calcite in a chemical mode, a hydrophilic film is formed on the surface of the calcite, adsorption of a hydrophobic collecting agent is hindered, and therefore inhibition on the calcite is achieved, and the selective inhibition capacity on the high-calcite type fluorite mine is enhanced through the synergistic effect of the combined reagent.

Description

Technical Field

[0001] The invention relates to the technical field of ore flotation, and in particular to a method for beneficiating a high-calcite type fluorite ore. Background Art

[0002] Fluorite is a strategically important non-metallic mineral resource, and its application fields cover traditional industries and emerging industries such as metallurgy, chemical industry, building materials, ceramics, aviation, refrigeration, medicine, atomic energy industry, and fluorine chemical industry. In recent years, with the increasing demand for fluorite in industries such as new energy, new materials, and fluorine chemical industry. my country has abundant reserves of co-existing and associated fluorite resources, and has great potential for development and utilization. However, the fluorite content in this type of ore is low, and the ore properties are complex. In addition to quartz, the main gangue minerals also contain calcite (CaCO3), celestite (SrSO4), barite (BaSO4), etc. Calcite (CaCO3) and fluorite (CaF2) are closely symbiotic and have very similar properties. It is difficult to separate them, and the higher the calcite content, the more difficult it is to obtain high-grade fluorite products. The calcite inhibitors commonly used in the prior art include: acidified water glass, tannin extract, maltodextrin, carboxymethyl cellulose, etc., which have a certain inhibitory effect on calcite, but it is difficult to achieve effective separation of fluorite and calcite. The patent with publication number CN103706485B provides a method for beneficiating high calcium carbonate fluorite ore. This method uses tannic acid as an inhibitor, but this agent is expensive and difficult to apply industrially. In addition, hydrofluoric acid is used for acid leaching, which is a relatively dangerous process and difficult to operate in actual production.

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

[0004] In view of the technical problems existing in the background technology, the present application provides a high-calcite fluorite ore beneficiation method, which aims to solve the existing technical problem that it is difficult to separate carbonate minerals from fluorite ore resources in low-grade fluorite ore containing high-grade carbonate minerals.

[0005] The present application provides a method for beneficiating a high-calcite fluorite ore, comprising the following steps:

[0006] S1. Crushing the target ore and then making it into slurry;

[0007] S2, performing roughing, scavenging and concentrating operations on the slurry to finally obtain fluorite concentrate;

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

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

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

[0011] The collector CK-1 includes two or more of sub-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 the embodiment of the present application, by adding a specially prepared highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 to a high-calcite fluorite ore, and coordinating with soda ash, acidified water glass reagents and a roughing-sweeping-selection process, the problem that calcite and fluorite have similar properties and are difficult to separate during the flotation process, and the current situation that the recovery rate and grade of fluorite are both in a relatively low range, is solved. Among them, the specially prepared collector CK-1 used can be strongly adsorbed on the surface of Ca ions by chemical means. Compared with traditional collectors, this collector can significantly reduce the amount of adsorption on the surface of calcite, thus strengthening the difference in floatability between fluorite and calcite and reducing the cost of the reagent. The inhibitor CD-8 used is adsorbed on the surface of calcite by chemical means, and forms a hydrophilic film on the surface of calcite, which can hinder the adsorption of hydrophobic collectors, thereby achieving the inhibition of calcite, thus strengthening the selective inhibition ability of 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 docosapentaenoic acid in the collector 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, the 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 includes selection I, selection II, selection III, selection IV, selection V, selection VI, and selection VII; the agents added during selection I include inhibitor CD-8 and acidified water glass; the amount of inhibitor CD-8 during selection I is 200-300 g / t, and the amount of acidified water glass is 700-900 g / t; the agents added during selection II, selection III, selection IV, selection V, and selection VI include acidified water glass; the amounts 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 fluorite ore beneficiation method further includes: concentrating, re-selecting, and fine sweeping operations on the middling ore I obtained from the beneficiation I and the middling ore II obtained from the beneficiation II.

[0027] In some embodiments, the reagents added when the middling ore I is subjected to reselection I include acidified water glass and collector CK-1; when the middling ore I is subjected to reselection I, the amount of acidified water glass used is 200-700 g / t, and the amount of collector CK-1 used is 10-30 g / t; when the middling ore I is subjected to fine scavenging I, the reagents added when the middling ore I is subjected to fine scavenging I include acidified water glass and collector CK-1; when the middling ore I is subjected to fine scavenging I, the amount of acidified water glass used 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 when the middling ore II is subjected to reselection II include acidified water glass and collector CK-1; when the middling ore II is subjected to reselection II, the amount of acidified water glass used is 300-400 g / t, and the amount of collector CK-1 used is 10-30 g / t; when the middling ore II is subjected to fine scavenging II, the reagents added when the middling ore II is subjected to fine scavenging II include acidified water glass and collector CK-1; when the middling ore II is subjected to fine scavenging II, the amount of acidified water glass used 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 the middling ore I is 18-22%; the concentration of the middling ore II is 18-22%; in step S1, the concentration of the prepared slurry is 30-35%.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a flow chart of the high calcite fluorite ore beneficiation method in the embodiment of the present application. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the prior art, when flotating high calcium carbonate fluorite, tannic acid is used as an inhibitor and oleic acid as a collector. However, tannic acid is expensive and difficult to apply industrially. In addition, hydrofluoric acid is required for acid leaching during the flotation process, which is dangerous and difficult to operate in actual production. Oleic acid also 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 levels of carbonate minerals while controlling the cost of reagents.

[0039] In order to solve the above-mentioned technical problems, the present application provides a high-calcite fluorite ore beneficiation method, wherein a specially prepared high-selectivity fluorite collector CK-1 and a calcite inhibitor CD-8 are added to the high-calcite fluorite ore, and soda ash, acidified water glass reagents and a roughing-sweeping-concentrating process are used in combination to achieve effective separation of calcite and fluorite, thereby ensuring the effective recovery of the subsequent fluorite concentrate.

[0040] The present invention provides a method for beneficiating a high-calcite fluorite ore, comprising the following steps:

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

[0042] S2, performing roughing, scavenging and concentrating operations on the slurry to finally obtain fluorite concentrate;

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

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

[0045] The mass ratio of alpha-linolenic acid to docosapentaenoic acid in the collector 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; when performing roughing, the amount of soda ash is 800-1200 g / t, the amount of acidified water glass is 800-1200 g / t, the amount of inhibitor CD-8 is 300-700 g / t, and the amount of collector CK-1 is 300-700 g / t;

[0053] The reagents added during scavenging include acidified water glass and collector CK-1; during 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; during 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.

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

[0055] The reagents added during the selection II, selection III, selection IV, selection V and selection VI include acidified water glass; the amounts of acidified water glass added during the 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.

[0056] The collector CK-1 includes two or more of sub-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 lasts 2 to 3 minutes.

[0059] By adding a specially made highly selective fluorite collector CK-1 and a calcite inhibitor CD-8 to high-calcite fluorite ore, and coordinating with soda ash, acidified water glass reagents and a roughing-sweeping-concentrating process, the problem of fluorite recovery and grade being in a low range due to the similar properties of calcite and fluorite in the flotation process has been solved. Among them, the specially made collector CK-1 is chemically adsorbed on the surface of Ca ions. Compared with traditional collectors, this collector can significantly reduce the adsorption amount on the surface of calcite, so it has good selectivity for calcite, strengthens the floatability difference between fluorite and calcite, and reduces the cost of reagents. The inhibitor CD-8 is chemically adsorbed on the surface of calcite and forms a hydrophilic film on the surface of calcite, which can hinder the adsorption of hydrophobic collectors, thereby achieving the inhibition of calcite, thus strengthening the selective inhibition ability of high-calcite fluorite ore. It is conducive to improving the grade of the final phosphate concentrate.

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

[0061] Furthermore, in some embodiments, the high calcite type fluorite ore beneficiation method further comprises: concentrating, re-selecting, and fine sweeping the middling ore I obtained by beneficiation I and the middling ore II obtained by beneficiation II;

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

[0063] The reagents added when the middling ore I is subjected to reselection I include acidified water glass and collector CK-1; the amount of acidified water glass used when the middling ore I is subjected to reselection I is 200-700 g / t, and the amount of collector CK-1 used is 10-30 g / t; the reagents added when the middling ore I is subjected to fine scavenging I include acidified water glass and collector CK-1; the amount of acidified water glass used when the middling ore I is subjected to fine scavenging I is 300-400 g / t, and the amount of collector CK-1 used is 5-10 g / t;

[0064] The reagents added when the middling ore II is subjected to reselection II include acidified water glass and collector CK-1; when the middling ore II is subjected to reselection II, the amount of acidified water glass used is 300-400 g / t, and the amount of collector CK-1 used is 10-30 g / t; the reagents added when the middling ore II is subjected to fine scavenging II include acidified water glass and collector CK-1; when the middling ore II is subjected to fine scavenging II, the amount of acidified water glass used is 100-200 g / t, and the amount of collector CK-1 used is 5-10 g / t.

[0065] By concentrating, reselecting and fine sweeping the middlings obtained in the concentration, and equipping with corresponding acidified water glass and collector CK-1 for further processing, the fluorite in the ore can be fully floated out to reduce resource waste.

[0066] In the technical solution of the embodiment of the present application, collector CK-1, inhibitor CD-8, soda ash, and acidified water glass reagent are added to the low-grade fluorite ore during the roughing-scavenging-concentrating process to respectively enhance the collection of fluorite and the inhibition of calcite, thereby achieving effective separation of calcite and fluorite, which is conducive to finally obtaining high-grade fluorite concentrate.

[0067] Some specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. If specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used without specifying the manufacturer are all conventional products that can be obtained commercially.

[0068] Taking a high calcium carbonate fluorite mine in Xinjiang as an example, the ore components in the ore sample are mainly CaCO3 and CaF2, followed by SiO2. Calcium in the ore is mainly found in fluorite and calcite, and a small amount is found in other minerals. The calcium content in fluorite is about 18.66%, with a distribution rate of 45.32%; the calcium content in calcite is about 22.35%, with a distribution rate of 54.29%.

[0069] Example 1

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

[0071] S1. Crushing the target ore to a particle size of -0.074 mm accounting for 70%, and then making it into a slurry with a concentration of 33%;

[0072] S2, subjecting the slurry to one roughing selection, two scavenging selections, and seven concentrating operations, and finally obtaining fluorite concentrate; wherein the two scavenging selections include scavenging selection I and scavenging selection II; the seven concentrating selections include concentrating selection I, concentrating selection II, concentrating selection III, concentrating selection IV, concentrating selection V, concentrating selection VI, and concentrating selection VII; the middling ore I obtained from concentrating selection I and the middling ore II obtained from concentrating selection II are respectively subjected to concentration, re-selection, and fine scavenging operations;

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

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

[0075] The reagents added during the concentration I include 250 g / t of inhibitor CD-8 and 833 g / t of acidified water glass; the time for the concentration I is 2.5 min;

[0076] The reagents added during the selection of II, III, IV, V and VI include acidified water glass; the amounts of acidified water glass added during the selection of II, III, IV, V and VI are 667 g / t, 500 g / t, 334 g / t, 167 g / t and 84 g / t respectively; the time for the selection of II, III, IV, V and VI is also 2 minutes;

[0077] The concentration of the middling ore I is 31%; the concentration of the middling ore II is 30%;

[0078] The reagents added when the middling ore I is subjected to reselection I include 500 g / t of acidified water glass and 21 g / t of collector CK-1; the reagents added when the middling ore I is subjected to fine sweeping selection I include 334 g / t of acidified water glass and 7 g / t of collector CK-1;

[0079] The reagents added when the medium ore II is subjected to re-selection II include 334g / t of acidified water glass and 21g / t of collector CK-1; the reagents added when the medium ore II is subjected to fine sweeping selection II include 167g / t of acidified water glass and 7g / t of collector CK-1.

[0080] The collector CK-1 described in this embodiment is composed of sub-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 CaF2 grade in the final fluorite concentrate is 98.34%, and the recovery rate is as high as 84.36%.

[0083] Example 2

[0084] Example 2 provides a high-calcite fluorite ore beneficiation method, which is different from Example 1 in that the collector CK-1 used is composed of sub-alpha-linolenic acid and arachidonic acid in a mass ratio of 15:30. The remaining steps are consistent with Example 1 and are not repeated here.

[0085] Example 3

[0086] Example 3 provides a high calcite fluorite ore beneficiation method, which is different from Example 1 in that the collector CK-1 used is composed of sub-alpha linolenic acid and docosapentaenoic acid in a mass ratio of 15:55. The remaining steps are consistent with Example 1 and are not repeated here.

[0087] Example 4

[0088] Example 4 provides a high calcite fluorite ore beneficiation method, which is different from Example 1 in 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 consistent with Example 1 and are not repeated here.

[0089] Example 5

[0090] Example 5 provides a high calcite fluorite ore beneficiation method, which is different from Example 1 in 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 consistent with Example 1 and are not repeated here.

[0091] Example 6

[0092] Example 6 provides a high-calcite fluorite ore beneficiation method, which is different from Example 1 in 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 consistent with Example 1 and are not repeated here.

[0093] Example 7

[0094] Example 7 provides a high calcite fluorite ore beneficiation method, which is different from Example 1 in 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 consistent with Example 1 and are not repeated here.

[0095] Comparative Example 1

[0096] Comparative Example 1 provides a high-calcite fluorite ore beneficiation method, which differs from Example 1 in that the collector CK-1 is replaced by oleic acid. The remaining steps are consistent with Example 1 and are not described here.

[0097] Comparative Example 2

[0098] Comparative Example 2 provides a high-calcite fluorite ore beneficiation method, which is different from Example 1 in that the collector CK-1 used is composed of sub-alpha-linolenic acid. The remaining steps are consistent with Example 1 and are not repeated here.

[0099] Comparative Example 3

[0100] Comparative Example 3 provides a high calcite fluorite ore beneficiation method, which is different from Example 1 in that the inhibitor CD-8 is replaced by tannin extract. The remaining steps are consistent with Example 1 and are not repeated here.

[0101] Comparative Example 4

[0102] Comparative Example 4 provides a high-calcite fluorite ore beneficiation method, which differs from Example 1 in that the inhibitor CD-8 is replaced by calcium lignin sulfonate. The remaining steps are consistent with Example 1 and are not repeated here.

[0103] Comparative Example 5

[0104] Comparative Example 5 provides a high-calcite fluorite ore beneficiation method, which differs from Example 1 in that the inhibitor CD-8 is replaced by carboxymethyl cellulose. The remaining steps are consistent with Example 1 and are not described here.

[0105] Comparative Example 6

[0106] Comparative Example 6 provides a high-calcite fluorite ore beneficiation method, which is different from Example 1 in that the inhibitor CD-8 used is composed of hydroxypropyl starch. The remaining steps are consistent with Example 1 and are not repeated here.

[0107] Comparative Example 7

[0108] Comparative Example 7 provides a high-calcite fluorite ore beneficiation method, which is different from Example 1 in that the test process adopts a flotation operation of one roughing selection-two scavenging selections-seven concentrating selections in sequence. The remaining steps are consistent with Example 1 and will not be repeated here.

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

[0110] Table 1 Separation results of high calcite fluorite ore in Examples 1 to 9 and Comparative Examples 1 to 7

[0111]

[0112]

[0113] As shown in Table 1, the high-calcite fluorite ore beneficiation method provided by the present application is adopted, and a specially prepared high-selectivity fluorite collector CK-1 and a calcite inhibitor CD-8 are added to the high-calcite fluorite ore, and a roughing-sweeping-cleaning process and a reselection-fine sweeping process are carried out on the middling ore; wherein the collector CK-1 comprises two or more of sub-alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid, and the inhibitor CD-8 comprises hydroxypropyl starch, propylene glycol alginate, and thorny Two or more of the above locust bean gums can eventually obtain a fluorite concentrate with a CaF2 grade of more than 94.57%, and can ensure a recovery rate of more than 83.25%; and when the collector CK-1 is composed of sub-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 grade of up to 98.34% can be obtained, and the recovery rate is as high as 84.36%.

[0114] In summary, the high-calcite fluorite ore beneficiation method provided by the present invention solves the problem that the fluorite recovery rate and grade are both in a relatively low range due to the difficulty in separation of calcite and fluorite due to their similar properties during flotation by adding a special high-selectivity fluorite collector CK-1 and a calcite inhibitor CD-8 to the high-calcite fluorite ore, and by combining soda ash, acidified water glass reagents and a roughing-sweeping-selecting-selecting process. Among them, the special collector CK-1 used is chemically adsorbed on the surface of Ca ions. Compared with traditional collectors, this collector can significantly reduce the amount of adsorption on the surface of calcite, thereby strengthening the floatability difference between fluorite and calcite and reducing the cost of reagents. The inhibitor CD-8 used is chemically adsorbed on the surface of calcite, and forms a hydrophilic film on the surface of calcite, which hinders the adsorption of the collector, thereby achieving the inhibition of calcite, so that the synergistic effect of the combined reagents is used to enhance the selective inhibition ability of the high-calcite fluorite ore.

[0115] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A high calcite fluorite ore beneficiation method, characterized in that: The following steps are involved: S1. Crushing the target ore and then making it into slurry; S2, performing roughing, scavenging and concentrating operations on the slurry to finally obtain fluorite concentrate; The reagents added during roughing include: alkali, acidified water glass, inhibitor CD-8, collector CK-1; The reagents added during the sweeping process include acidified water glass and collector CK-1; The reagents added during the selection process include one or more of inhibitor CD-8 and acidified water glass; The collector CK-1 includes two or more of sub-alpha-linolenic acid, arachidonic acid, and docosapentaenoic acid; The inhibitor CD-8 includes two or more of hydroxypropyl starch, propylene glycol alginate and locust bean gum.

2. The high calcite type fluorite ore beneficiation method according to claim 1, characterized in that: 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 docosapentaenoic acid in the collector 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; and / or The mass ratio of hydroxypropyl starch to propylene glycol alginate in the inhibitor CD-8 is 20-40:20-40; or The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20-40:20-40; The mass ratio of propylene glycol alginate to locust bean gum in the inhibitor CD-8 is 20-40:20-40; or The mass ratio of hydroxypropyl starch, propylene glycol alginate and locust bean in the inhibitor CD-8 is 20-40:20-40:20-40.

3. The high calcite type fluorite ore beneficiation method according to claim 1, characterized in that: The pH value of acidified water glass ranges from 1 to 2.

4. The high calcite type fluorite ore beneficiation method according to claim 3, characterized in that: The alkali includes soda ash; during rough selection, 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.

5. The high calcite type fluorite ore beneficiation method according to claim 3, characterized in that: The scavenging includes scavenging I and scavenging II. When carrying out 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 carrying out 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.

6. The high calcite type fluorite ore beneficiation method according to claim 3, characterized in that: The selection includes selection I, selection II, selection III, selection IV, selection V, selection VI and selection VII; the reagents added during selection I include inhibitor CD-8 and acidified water glass; the dosage of inhibitor CD-8 during selection I is 200-300g / t, and the dosage of acidified water glass is 700-900g / t; the reagents added during selection II, selection III, selection IV, selection V and selection VI include acidified water glass; the dosage of acidified water glass added during selection II, selection III, selection IV, selection V and selection VI is 600-700g / t, 450-550g / t, 300-400g / t, 100-200g / t and 60-100g / t respectively.

7. The high calcite type fluorite ore beneficiation method according to claim 6, characterized in that: Also includes: The middling ore I obtained from concentration I and the middling ore II obtained from concentration II are concentrated, re-selected and finely scavenged.

8. The high calcite type fluorite ore beneficiation method according to claim 7, characterized in that: The reagents added when the middling ore I is subjected to reselection I include acidified water glass and collector CK-1; When the middling ore I is subjected to reselection I, the amount of acidified water glass used is 200-700 g / t, and the amount of collector CK-1 used is 10-30 g / t; when the middling ore I is subjected to fine sweeping selection I, the reagents added include acidified water glass and collector CK-1; When the middling ore I is subjected to fine scavenging and selection I, the amount of acidified water glass used is 300-400 g / t, and the amount of collector CK-1 used is 5-10 g / t.

9. The high calcite type fluorite ore beneficiation method according to claim 7, characterized in that: The reagents added when the middling ore II is subjected to reselection II include acidified water glass and collector CK-1; When the middling ore II is subjected to reselection II, the dosage of acidified water glass is 300-400 g / t, and the dosage of collector CK-1 is 10-30 g / t; when the middling ore II is subjected to fine scavenging II, the reagents added include acidified water glass and collector CK-1; when the middling ore II is subjected to fine scavenging II, the dosage of acidified water glass is 100-200 g / t, and the dosage of collector CK-1 is 5-10 g / t.

10. The high calcite type fluorite ore beneficiation method according to claim 7, characterized in that: The concentration of the medium ore I is 18-22%; the concentration of the medium ore II is 18-22%; in step S1, the concentration of the prepared slurry is 30-35%.

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