Collector for quartz direct reverse flotation and its preparation method and application

Abstract

The application discloses a collector for quartz positive and reverse flotation and a preparation method and application thereof. The collector is composed of the following components in weight parts: 1-5 parts of a cationic collector, 7-30 parts of an anionic collector and 10-25 parts of an emulsifier. The cationic collector is at least one of dodecylamine, coconut alkyl primary amine, octadecyl succinamide and butyryl hydrazine. The anionic collector is at least one of oleic acid, oxidized paraffin soap, naphthenic acid soap, cotton oil soap, rosin soap and sodium dodecyl sulfonate. The emulsifier is at least one of glycerol, Tween 80, isooctanol polyoxyethylene polyoxypropylene ether and tributyl phosphate. The collector can effectively modify the quartz surface under strong alkaline conditions and promote the hydrophobicity of the quartz ore surface, so that the flotation separation of feldspar and quartz is realized. The collector can effectively modify the feldspar surface under strong acidic conditions, so that the whitening and purification of the quartz concentrate are realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mineral processing, and particularly relates to a collector for quartz positive and reverse flotation, and a preparation method and application thereof. BACKGROUND

[0002] As an important industrial raw material, quartz is widely used, and is currently not limited to traditional glass products and other fields, but also begins to be applied to quartz plate, photovoltaic glass sand and other fields. In recent years, with the substantial increase in the production and consumption of quartz plates, the supply of quartz powder cannot meet the demand, and the market price of quartz powder is high. Therefore, in order to meet the development of the industry, the purification technology of quartz ore with complex ore properties and the comprehensive recovery and utilization of quartz resources in granite tailings should be strengthened.

[0003] For the flotation purification of quartz ore with low quality and complex properties, the traditional hydrofluoric acid method uses hydrofluoric acid as an activator for feldspar, uses a cationic collector, and preferentially selects feldspar under acidic slurry conditions, so as to achieve the flotation separation of quartz and feldspar. Although the hydrofluoric acid method is mature in technology and has significant separation effect, it is not recognized by industrial production due to the great harm of hydrofluoric acid to the human body and the bad influence on the environment. At present, the non-fluorine acid method is commonly used. In this process, strong acid is used to adjust the pH value of the slurry without adding hydrofluoric acid, and a single amine collector or a combination of cationic and anionic collectors is used to preferentially select feldspar, so as to realize the separation of quartz and feldspar. However, there are some problems such as large amount of reagent, high cost, large viscosity of flotation foam, poor separation effect, difficult wastewater treatment and the like. The traditional "non-fluorine and non-acid" method for flotation separation of feldspar and quartz has the problems of low efficiency and poor selectivity.

[0004] In the research on the comprehensive recovery and utilization of quartz resources in granite tailings, the main minerals in lepidolite tailings are quartz and feldspar, and the flotation pH is usually 10-12. Single amine collector is usually used to float lepidolite under acidic conditions, but the amine collector has strong collecting ability and poor selectivity, and the concentrate grade and recovery rate are low, and a large amount of alkaline reagent needs to be added to neutralize the acidic flotation environment for subsequent tailings flotation of quartz. However, when the combination of cationic and anionic collectors is used to float lepidolite, it is a weak alkaline environment, and the tailings can be directly floated for quartz, thereby reducing the cost of reagents.

[0005] Research shows that the separation of quartz and feldspar in lithium mica tailings can be achieved by using anionic and cationic collectors. The anionic collector sodium oleate activates feldspar in the adsorption active region of the amine cationic collector, making the floatability of quartz and feldspar more different. Chinese invention patent CN117101872A proposes a method for separating quartz and feldspar by alkali method and a collector, which uses anionic and cationic collectors. The SiO2 content of the quartz concentrate is 96%, but the grade still does not meet the quality requirements of quartz concentrate; Chinese invention patent CN117258995B uses a flotation-thermal pressure acid leaching process, and the SiO2 content of the quartz concentrate is 99.95%, but the process uses hydrofluoric acid mixed acid for thermal pressure acid leaching, which does not meet the green environmental protection concept. Therefore, there is an urgent need for a collector that can be used for quartz direct and reverse flotation, and a process method for separating feldspar and quartz that is fluoride-free, has high industrial application feasibility, complete process, and is green and efficient, which is of great significance to the comprehensive recovery and utilization of non-metallic resources in tailings. SUMMARY

[0006] In view of the deficiencies of the prior art, the first object of the present application is to provide a collector that can be used for quartz direct and reverse flotation. The collector has strong stability, is easy to disperse, has good selectivity, and has strong adaptability to slime. In the beneficiation process, the collector can float quartz under weak alkaline conditions, effectively separate quartz and feldspar, and also can reverse float feldspar under strong acid conditions, to realize efficient purification of quartz, thereby improving the grade and yield of quartz concentrate.

[0007] The second object of the present application is to provide a preparation method of the collector that can be used for quartz direct and reverse flotation.

[0008] The third object of the present application is to provide an application of the collector that can be used for quartz direct and reverse flotation.

[0009] To achieve the above technical purposes, the present application provides the following technical solutions:

[0010] The present application provides a collector CFLY-6 that can be used for quartz direct and reverse flotation, which is composed of the following components in parts by weight: 1-5 parts of a cationic collector, 7-30 parts of an anionic collector, and 10-25 parts of an emulsifier.

[0011] The cationic collector is at least one of dodecylamine, coconut alkyl primary amine, octadecyl succinamide, and butyryl hydrazine.

[0012] The anionic collector is at least one of oleic acid, oxidized paraffin wax soap, naphthenic acid soap, cotton oil soap, rosin soap, and sodium dodecyl sulfonate.

[0013] The emulsifier is at least one of octyl decanoate monoglyceride, lauric acid monoglyceride, sorbitol monostearate, and tributyl phosphate.

[0014] The collector CFLY-6 can be used for quartz direct and reverse flotation, and can float quartz under weak alkaline conditions with pH=9-12 and can reverse float feldspar under strong acid conditions with pH=1.5-3.

[0015] The collector has the advantages that: through the synergistic effect of the anionic collector, the cationic collector and the emulsifier, quartz can be floated under weak alkaline conditions with pH=9-12 to realize effective separation of quartz and feldspar, and feldspar can be reverse floated under strong acid conditions with pH=1.5-3 to realize efficient purification of quartz.

[0016] The application further provides a preparation method of the collector CFLY-6 which can be used for quartz direct and reverse flotation, and the preparation method comprises the following steps:

[0017] The cationic collector is dissolved in the emulsifier and stirred and dissolved; the anionic collector is placed in water, heated and stirred to form a 30% aqueous solution; and the two are mixed and uniformly stirred to obtain the collector CFLY-6 which can be used for quartz direct and reverse flotation.

[0018] The application further provides application of the collector CFLY-6 which can be used for quartz direct and reverse flotation in flotation recovery of quartz from lepidolite tailings, spodumene tailings, tantalum-niobium tailings or tungsten-tin tailings.

[0019] In some specific embodiments, based on the application of the collector CFLY-6 which can be used for quartz direct and reverse flotation in flotation recovery of quartz from lepidolite tailings, the application can be continued after a lepidolite weak alkaline flotation process, and comprises: continuing to perform flotation, gravity separation and magnetic separation operations on the lepidolite tailings in sequence.

[0020] Specifically, the flotation of the lepidolite tailings comprises once weak alkaline roughing, once weak alkaline cleaning, at least twice weak alkaline scavenging and at least twice strong acid reverse flotation.

[0021] Specifically, the weak alkaline roughing process comprises: sequentially adding a pH adjusting agent, an inhibitor, an activator and the collector CFLY-6 which can be used for quartz direct and reverse flotation into the lepidolite tailings slurry, and roughing to obtain a roughing concentrate and a roughing tailing.

[0022] Specifically, the weak alkaline scavenging process comprises: sequentially adding a pH adjusting agent, an activator and the collector CFLY-6 which can be used for quartz direct and reverse flotation into the roughing tailing, and performing at least twice scavenging to obtain a scavenging concentrate and a scavenging tailing, and the scavenging concentrate is sequentially returned to the previous process.

[0023] Specifically, the weak alkaline cleaning process comprises: adding a pH adjusting agent and an inhibitor into the roughing concentrate, and performing once cleaning to obtain a quartz roughing concentrate and a quartz middling, and the quartz middling is sequentially returned to the previous process.

[0024] Specifically, the strong acid reverse flotation process comprises: adding sulfuric acid, a collector CFLY-6 capable of being used for positive and reverse flotation of quartz into the quartz rough concentrate in sequence, and carrying out at least two times of strong acid reverse flotation, so that the quartz concentrate is obtained in the flotation tank, and the froth of the two times of reverse flotation is combined with the weak alkali scavenging tailings to form tailings.

[0025] Specifically, the wet magnetic separation intensity of the magnetic separation operation is 0.8-1.4T, and the magnetic separation time is 15min.

[0026] Specifically, the gravity separation operation equipment is one of a shaking table and a chute, and the main purpose of the gravity separation operation is to remove topaz in the quartz concentrate.

[0027] Specifically, the pH regulator is at least one of sodium carbonate and sodium hydroxide.

[0028] Specifically, the depressant is at least one of starch, dextrin, carboxymethyl cellulose, sodium hexametaphosphate, oxalic acid and water glass.

[0029] Specifically, the activator is one of calcium chloride, magnesium chloride and ferric chloride.

[0030] Specifically, in the weak alkali roughing, weak alkali cleaning and weak alkali scavenging process, the pH regulator adjusts the pH of the system to 9-12; and in the strong acid reverse flotation process, the pH regulator adjusts the pH of the system to 1.5-3.

[0031] Specifically, in the weak alkali roughing, weak alkali cleaning and weak alkali scavenging process, the adding amount of the pH regulator is 100-600g / t.

[0032] In the present application, g / t refers to the adding amount of the reagent relative to 1t of the lepidolite ore.

[0033] Specifically, in the weak alkali roughing, weak alkali cleaning and weak alkali scavenging process, the adding amount of the depressant is 50-200g / t.

[0034] Specifically, in the weak alkali roughing, weak alkali cleaning and weak alkali scavenging process, the adding amount of the activator is 30-250g / t.

[0035] Specifically, in the weak alkali roughing, weak alkali cleaning and weak alkali scavenging process, the adding amount of the collector CFLY-6 is 50-300g / t.

[0036] Specifically, in the strong acid reverse flotation process, the adding amount of the sulfuric acid is 50-200g / t.

[0037] Specifically, in the strong acid reverse flotation process, the adding amount of the collector CFLY-6 capable of being used for positive and reverse flotation of quartz is 20-150g / t.

[0038] The collector CFLY-6 capable of being used for quartz direct and reverse flotation can realize quartz flotation purification, compared with a single collector, the CFLY-6 has the characteristics of low surface tension and strong surface activity, after being adsorbed on the surface of the mineral, the particle hydrophobicity is stronger. Under strong alkali conditions, the cationic collector component and the anionic collector component are complexed by electrostatic attraction or hydrophobic interaction between carbon chains, selectively physically adsorbed on the surface of the quartz particle, the surface carbon chain density and height are increased through synergistic effect, so that the surface hydrophobic adsorption layer is more stable; the emulsifier can make the collector solution system into a continuous phase structure type microemulsion, increase the content of the molecular-ion complex in the reagent, accelerate the dispersion speed of the reagent in the ore slurry system, shorten the time for the reagent to complete adsorption on the surface of the mineral, the reagent has good collecting effect, and the recovery rate and grade of the quartz concentrate product are significantly improved.

[0039] The method for flotation recovery of quartz from lepidolite tailings based on the collector capable of being used for quartz direct and reverse flotation can be directly connected after the lepidolite weak alkali flotation process, without secondary grinding treatment, has the advantages of low reagent dosage, simple process, and high purity of the obtained quartz concentrate. The purity of the quartz concentrate separated from the lepidolite tailings is all above 97.5%, and can reach 99.5%.

[0040] Compared with the prior art, the collector has the advantages of simple preparation, no need for heating and strong stirring, good stability, low temperature resistance, strong selectivity, and good dispersion effect.

[0041] The collector has the advantages of simple preparation, no need for heating and strong stirring, good stability, low temperature resistance, strong selectivity, and good dispersion effect. The collector can effectively modify the surface of quartz under weak alkali conditions, promote the hydrophobicity of the surface of the quartz ore, and realize the flotation separation of feldspar and quartz; the surface of feldspar can be effectively modified under strong acid conditions, and the quartz concentrate can be whitened and purified. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a whole process schematic diagram of the method for flotation recovery of quartz from lepidolite tailings based on the collector capable of being used for quartz direct and reverse flotation.

[0043] Figure 2 is a whole process schematic diagram of the method for reverse flotation purification of quartz from quartz ore based on the collector capable of being used for quartz direct and reverse flotation. DETAILED DESCRIPTION

[0044] The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention. Without departing from the spirit and substance of the present invention, modifications or replacements made to the steps or conditions of the present invention are intended to fall within the scope of the present invention. It should be noted that, unless there is a conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0045] Example 1

[0046] The collector CFLY-6 used for forward and reverse flotation of quartz in this embodiment is composed of the following components in parts by weight: 4 parts of coconut alkyl primary amine, 6 parts of oleic acid, 3 parts of cotton oil soap, 3 parts of rosin soap, 8 parts of sodium lauryl sulfate, 6 parts of Tween 80, and 6 parts of tributyl phosphate; the collector CFLY-9 is composed of the following components in parts by weight: 19 parts of ethylene glycol monomethyl ether, 10 parts of diaminohydrazide, 20 parts of oleic acid, 20 parts of sodium cocoyl isethionate, 26 parts of emulsifier, and 5 parts of sodium hydroxide.

[0047] Figure 1 This is a schematic diagram of the entire process of Example 1.

[0048] The low-grade lepidolite ore in this embodiment is a low-grade lepidolite ore in Chenzhou City, Hunan Province. The raw ore has a Li2O content of 0.38%, and its main mineral compositions are quartz 45.88%, topaz 11.25%, mica 24.61%, kaolinite 8.55%, albite 2.48%, and microcline 7.23%. The lepidolite ore is subjected to desliming, coarse processing, fine processing, and sweeping to obtain lepidolite concentrate and lepidolite tailings. The lepidolite concentrate has a grade of 1.52%, a recovery rate of 85%, and an SiO2 content of 77.1% in the lepidolite tailings.

[0049] The lepidolite tailings are subjected to flotation, magnetic separation and gravity separation in sequence. The specific process is as follows:

[0050] (1) After obtaining the lepidolite concentrate by flotation, the lepidolite tailings slurry in the flotation tank is poured into a new flotation tank for weak alkaline flotation operation:

[0051] During the roughing operation, 300 g / t of sodium carbonate and 400 g / t of sodium hydroxide were added, and the slurry was adjusted for 3 minutes. The flotation pH value was 12. 200 g / t of starch inhibitor was added and stirred for 3 minutes. 150 g / t of magnesium chloride activator was added and stirred for 3 minutes. 200 g / t of CFLY-6 collector, which can be used for quartz forward and reverse flotation, was added and stirred for 5 minutes. After that, aeration and foaming were performed. The flotation time was 5 minutes to obtain the roughing concentrate and roughing tailings.

[0052] Two times of scavenging operations are carried out on the roughing tailings: adding sodium hydroxide 100 g / t, stirring for 3 min; adding inhibitor starch 150 g / t, stirring for 3 min; adding activator magnesium chloride 50 g / t, stirring for 3 min; adding CFLY-6 650 g / t, stirring for 3 min, then carrying out aeration and froth scraping operation, and the flotation time is 3 min, to obtain the scavenging middlings and the scavenging tailings, and the scavenging middlings are returned to the upper stage in sequence;

[0053] One time of cleaning operation is carried out on the rough concentrate, adding inhibitor starch 100 g / t, stirring for 3 min, and the flotation time is 4 min, to obtain the quartz rough concentrate, and the quartz middlings are returned to the roughing;

[0054] (2) Two times of strong acid reverse flotation operations are carried out on the quartz rough concentrate:

[0055] The first time, sulfuric acid 150 g / t is added, and the pulp is conditioned for 5 min, the flotation pH value is 2; CFLY-6 quartz collector 50 g / t is added, stirring for 3 min, then carrying out aeration and froth scraping operation, and the flotation time is 3 min; the second time, sulfuric acid 50 g / t is added, and the pulp is conditioned for 3 min, the flotation pH value is 2; CFLY-6 quartz collector 30 g / t is added, stirring for 3 min, then carrying out aeration and froth scraping operation, and the flotation time is 3 min, and the two times of obtained reverse flotation froth are combined as the tailings, and the flotation tank is the quartz concentrate;

[0056] (3) The quartz concentrate is sequentially subjected to wet strong magnetic separation operation and gravity separation operation, the wet magnetic separation intensity is 0.8-1.4 T, and the magnetic separation time is 15 min; the gravity separation operation adopts a shaking table, and the quartz product is obtained.

[0057] After steps (1)-(3), using CFLY-6 as the quartz collector for the lepidolite tailings, a high-purity quartz product with a SiO2 content of 99.52% and a yield of 18.67% can be obtained.

[0058] Comparative Example 1

[0059] Compared with Example 1, the difference of the present comparative example is that the flotation pH value of the weak alkali flotation operation is adjusted to 8, and the specific operation is that sodium carbonate 100 g / t and sodium hydroxide 50 g / t are sequentially added to the lepidolite tailings slurry to adjust the pH value to 8, and the slurry is allowed to act for 3 min.

[0060] The purity of the quartz product obtained in the present comparative example is 95.4%, and the yield is 12.48%.

[0061] Comparative Example 2

[0062] The difference between the present comparative example and example 1 is that the composition of the quartz collector is different, specifically, 10 parts by weight of oleic acid, 6 parts by weight of sodium dodecyl sulfonate, 7 parts by weight of sodium cocoyl isethionate, and 15 parts by weight of Tween 80, and the prepared quartz collector is denoted as CFLY-6A.

[0063] The purity of the final quartz product obtained in the present comparative example is 85.4%, and the yield is 13.72%.

[0064] Comparative Example 3

[0065] The difference between the present comparative example and example 1 is that the wet high-intensity magnetic separation and gravity separation operations are no longer performed on the quartz concentrate.

[0066] The purity of the final quartz product obtained in the present comparative example is 95.4%, and the yield is 20.64%.

[0067] Comparative Example 4

[0068] The difference between the present comparative example and example 1 is that the amount of the depressant used in the weak alkaline flotation process is reduced, specifically, 100 g / t of starch is added in the weak alkaline roughing, 50 g / t of starch is added in the weak alkaline scavenging, and 20 g / t of starch is added in the weak alkaline cleaning, and the action time is 3 minutes.

[0069] The purity of the quartz product obtained in the present comparative example is 93.6%, and the yield is 22.27%.

[0070] Comparative Example 5

[0071] The difference between the present comparative example and example 1 is that the composition of the collector is different, specifically, 7 parts by weight of dodecylamine, 5 parts by weight of cocoyl primary amine, 5 parts by weight of oleic acid, 3 parts by weight of sodium dodecyl sulfonate, 4 parts by weight of sodium cocoyl isethionate, and 10 parts by weight of Tween 80, and the prepared collector is denoted as CFLY-6B.

[0072] The purity of the final quartz product obtained in the present comparative example is 80.8%, and the yield is 29.16%.

[0073] Comparative Example 6

[0074] The difference between the present comparative example and example 1 is that the composition of the collector is different, specifically, 7 parts by weight of dodecylamine, 5 parts by weight of cocoyl primary amine, 5 parts by weight of oleic acid, 3 parts by weight of sodium dodecyl sulfonate, 4 parts by weight of sodium cocoyl isethionate, and 10 parts by weight of Tween 80, and the prepared collector is denoted as CFLY-6B.

[0075] The purity of the final quartz product obtained in the present comparative example is 80.8%, and the yield is 29.16%.

[0076] Comparative Example 7

[0077] Comparative Example 7 differs from Example 1 in that the composition of the collector is different, and no emulsifier is added. Specifically, 4 parts of coconut alkyl primary amine, 6 parts of oleic acid, 3 parts of cottonseed oil soap, 3 parts of rosin soap, and 8 parts of sodium dodecyl sulfonate are used by weight, and the prepared collector is denoted as CFLY-6D.

[0078] The purity of the final quartz product obtained in Comparative Example 7 is 78.4%, and the yield is 22.49%.

[0079] Comparative Example 8

[0080] Comparative Example 8 differs from Example 1 in that the composition of the collector is different, and no cationic collector is added. Specifically, 8 parts of oleic acid, 4 parts of cottonseed oil soap, 4 parts of rosin soap, 6 parts of sodium dodecyl sulfonate, 10 parts of Tween 80, and 5 parts of tributyl phosphate are used by weight, and the prepared collector is denoted as CFLY-6E.

[0081] The purity of the final quartz product obtained in Comparative Example 8 is 79.6%, and the yield is 27.49%.

[0082] Comparative Example 9

[0083] Comparative Example 9 differs from Example 1 in that the composition of the collector is different, and no anionic collector is added. Specifically, 5 parts of coconut alkyl primary amine, 5 parts of Tween 80, and 5 parts of tributyl phosphate are used by weight, and the prepared collector is denoted as CFLY-6F.

[0084] The purity of the final quartz product obtained in Comparative Example 9 is 80.7%, and the yield is 14.79%.

[0085] Comparative Example 10

[0086] Comparative Example 10 differs from Example 1 in that the composition of the collector is different, and no anionic collector and emulsifier are added. Specifically, 15 parts of oleic acid, 5 parts of cottonseed oil soap, 5 parts of rosin soap, and 5 parts of sodium dodecyl sulfonate are used by weight, and the prepared collector is denoted as CFLY-6G.

[0087] The purity of the final quartz product obtained in Comparative Example 10 is 78.4%, and the yield is 24.87%.

[0088] Comparative Example 11

[0089] Comparative Example 11 differs from Example 1 in that the composition of the collector is different, and no anionic collector and emulsifier are added. Specifically, 2 parts of dodecylamine and 1 part of coconut alkyl primary amine are used by weight, and the prepared collector is denoted as CFLY-6H.

[0090] The purity of the final quartz product obtained in the present comparative example is 81.24%, and the yield is 10.37%.

[0091] Example 2

[0092] Compared with Example 1, the difference of the present example is that the composition of the collector is different, specifically: 5 parts of dodecylamine, 10 parts of oleic acid, 3 parts of cotton oil soap, 3 parts of glycerol, and 10 parts of isooctanol polyoxyethylene polyoxypropylene ether by weight. The prepared collector is recorded as CFLY-6-1.

[0093] The purity of the final quartz product obtained in the present example is 99.37%, and the yield is 17.28%.

[0094] Example 3

[0095] Compared with Example 1, the difference of the present example is that the composition of the collector is different, specifically: 2 parts of dodecylamine, 3 parts of coconut alkyl primary amine, 15 parts of oleic acid, 3 parts of cotton oil soap, 3 parts of rosin soap, 5 parts of glycerol, and 10 parts of Tween 805 by weight. The prepared collector is recorded as CFLY-6-2.

[0096] The purity of the final quartz product obtained in the present example is 99.07%, and the yield is 19.16%.

[0097] Example 4

[0098] The present example embodies the application of the quartz collector CFLY-6 in quartz mines, Figure 2 The present example is a full-process schematic diagram.

[0099] In the present example, the quartz mine is a certain low-grade quartz mine in Yunnan, and the silicon dioxide content of the raw ore is 65%. The quartz mine is subjected to desliming-reverse flotation-classification-magnetic separation-roasting and water quenching-acid leaching to obtain quartz concentrate 1, quartz concentrate 2 and tailings. The specific process is as follows:

[0100] (1) The quartz mine is ground to a content of 55% of -0.074 mm to obtain a slurry.

[0101] (2) The slurry is subjected to desliming operation. The laboratory adopts sedimentation desliming, and the industry adopts classification or cyclone desliming, aiming to remove kaolin in the quartz mine.

[0102] (3) Both times of reverse flotation operation are to add sulfuric acid, inhibitor and CFLY-6 in turn, stir for 3 min, and then operate by charging air and scraping foam. The flotation pH is 2.5, and the flotation time is 3 min to obtain tailings and quartz rough concentrate. The addition amount of each reagent is:

[0103] First reverse flotation: sulfuric acid 1500g / t, starch 300g / t, sodium hexametaphosphate 500g / t, CFLY-6 collector 300g / t.

[0104] Second reverse flotation: sulfuric acid 1000g / t, starch 150g / t, sodium hexametaphosphate 150g / t, CFLY-6 collector 150g / t.

[0105] (4) The quartz rough concentrate is classified to obtain a -0.074mm product as quartz concentrate 1; and a +0.074mm product, named quartz concentrate.

[0106] (5) The quartz concentrate is subjected to wet high intensity magnetic separation and gravity separation in sequence, the wet magnetic separation intensity is 0.8-1.4T, the magnetic separation time is 15min, the magnetic substance is introduced into the tailings, and the non-magnetic substance is introduced into the next selection.

[0107] (6) The non-magnetic substance is subjected to roasting operation, the roasting temperature is 900℃, the roasting time is 5h, and after the operation, water quenching operation is performed.

[0108] (7) The material after water quenching is subjected to acid leaching, the acid used in the acid leaching is one of sulfuric acid and hydrochloric acid, the acid leaching temperature is 80℃, the leaching time is 6h, and the liquid-solid ratio is 10:1.

[0109] (8) After the acid leaching is completed, the leaching residue is suction filtered and dried to obtain quartz concentrate 2.

[0110] The purity of the quartz concentrate 1 obtained in the example is 98.2%, the yield is 14.73%, the purity of the quartz concentrate 2 is 99.84%, and the yield is 12.18%.

[0111] Example 5

[0112] The process of the example is basically the same as that of example 4, and the difference is that the starch is replaced by oxalic acid, and the sodium hexametaphosphate is replaced by water glass.

[0113] A high-purity quartz product can be obtained through the example, the SiO2 content of the quartz product is 98.9%, and the yield is 32.59%.

[0114] The content illustrated in the above examples should be understood as the examples only for more clearly illustrating the present application, and should not be used for limiting the scope of the present application, and after reading the present application, the modification of various equivalent forms of the present application by the person skilled in the art falls within the scope defined by the appended claims of the present application.

Claims

1. An application of collector CFLY-6 in flotation recovery of quartz, characterized in that: The application of the collector CFLY-6 in the flotation recovery of quartz in the lepidolite tailings is followed by the lepidolite weak alkaline flotation process, including: continuing to perform flotation, gravity separation and magnetic separation operations on the lepidolite tailings in sequence; the flotation of the lepidolite tailings includes: one weak alkaline roughing separation, one weak alkaline cleaning, at least two weak alkaline scavenging separations, and at least two strong acid reverse flotation. The weak base roughing process comprises: sequentially adding a pH adjuster, an inhibitor, an activator and the collector CFLY-6 to the lepidolite tailings slurry, and performing roughing to obtain a roughing concentrate and a roughing tailings; The weak base scavenging process is as follows: a pH adjuster, an activator and the collector CFLY-6 are sequentially added to the roughing tailings, and after at least two scavengings, scavenged ore and scavenged tailings are obtained, and the scavenged ore is returned to the previous level process in sequence; The weak base concentration process is as follows: adding a pH adjuster and an inhibitor to the coarse concentrate, performing a primary concentration to obtain a quartz coarse concentrate and a quartz middling, and the quartz middling is sequentially returned to the previous level process; The strong acid reverse flotation process is as follows: sulfuric acid and the collector CFLY-6 are sequentially added to the quartz coarse concentrate, and after at least two strong acid reverse flotations, the flotation tank contains quartz concentrate, and the two reverse flotation foams and the weak alkaline scavenging tailings are combined into tailings; The collector CFLY-6 is composed of the following components in parts by weight: 1 to 5 parts of cationic collector, 7 to 30 parts of anionic collector, and 10 to 25 parts of emulsifier; The cationic collector is at least one of dodecylamine, coconut oil alkyl primary amine, octadecylsuccinamide, and butyrylhydrazide; The anionic collector is at least one of oleic acid, oxidized paraffin soap, naphthenic acid soap, cotton oil soap, rosin soap, and sodium lauryl sulfate; The emulsifier is at least one of glycerol, Tween 80, isooctyl polyoxyethylene polyoxypropylene ether, and tributyl phosphate.

2. The use according to claim 1, characterized in that The collector CFLY-6 can not only float quartz under weak alkaline conditions of pH=9-12, but also reverse float feldspar under strong acid conditions of pH=1.5-3.

3. The use according to claim 1, characterized in that The preparation method of the collector CFLY-6 comprises the following steps: The cationic collector is dissolved in the emulsifier and stirred to dissolve; the anionic collector is placed in water, heated and stirred to form a 30% aqueous solution; the two are mixed and stirred evenly to obtain the collector CFLY-6 that can be used for quartz forward and reverse flotation.

4. The use according to claim 1, characterized in that The application also includes the use of collector CFLY-6 in flotation recovery of quartz from quartz ore, spodumene tailings, tantalum-niobium tailings or tungsten-tin tailings.

5. The use according to claim 1, characterized in that The pH adjuster is at least one of sodium carbonate and sodium hydroxide; the inhibitor is at least one of starch, dextrin, carboxymethyl cellulose, sodium hexametaphosphate, oxalic acid, and water glass; and the activator is one of calcium chloride, magnesium chloride, and ferric chloride.

6. The use according to claim 1, characterized in that During the weak base roughing, weak base cleaning and weak base scavenging processes, the pH adjuster adjusts the system pH to 9-12; during the strong acid reverse flotation process, the pH adjuster adjusts the system pH to 1.5-3; In the weak base roughing, weak base cleaning and weak base scavenging stages, the addition amount of pH adjuster is 100-600 g / t, the addition amount of inhibitor is 50-200 g / t, the addition amount of activator is 30-250 g / t, and the addition amount of collector CFLY-6 is 50-300 g / t; In the strong acid reverse flotation stage, the amount of sulfuric acid added is 50-200 g / t, and the amount of collector CFLY-6 added is 20-150 g / t.

7. The use according to claim 5, characterized in that The wet magnetic separation intensity of the magnetic separation operation is 0.8~1.4T, and the magnetic separation time is 15min.

8. The use according to claim 5, characterized in that The gravity separation equipment is a shaking table or a chute.

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