Collecting agent capable of being used for positive and negative flotation of quartz and preparation method and application of collecting agent

Abstract

The invention discloses a collecting agent capable of being used for quartz direct and reverse flotation and a preparation method and application of the collecting agent. The collecting agent consists of the following components in parts by weight: 1-5 parts of a cation collecting agent, 7-30 parts of an anion collecting agent and 10-25 parts of an emulsifier, the cation collecting agent is at least one of lauryl amine, coconut oil alkyl primary amine, octadecyl succinamide and daminozide; the anion collecting agent is at least one of oleic acid, oxidized paraffin soap, naphthenic acid soap, cottonseed oil soap, rosin soap and sodium dodecyl sulfate; the emulsifying agent is at least one of glycerol, Tween 80, isooctanol polyoxyethylene polyoxypropylene ether and tributyl phosphate. Based on the synergistic effect of all the components, the collecting agent can effectively modify the surface of quartz under the strong alkaline condition, hydrophobization of the surface of quartz ore is promoted, and therefore flotation separation of feldspar and quartz is achieved; the feldspar surface can be effectively modified under the strong acid condition, and whitening and purification of quartz concentrate are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of mineral processing engineering, and in particular relates to a collector that can be used for quartz forward and reverse flotation, and a preparation method and application thereof. Background Art

[0002] As an important industrial raw material, quartz is widely used. It is not limited to traditional glass products and other fields. It has also begun to be used in quartz plates, photovoltaic glass sand and other fields. In recent years, with the substantial increase in the production and consumption of quartz plates, quartz powder is in short supply and the market price of quartz powder remains high. Therefore, in order to meet the development of the industry, research on the purification technology of quartz ores 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 low-quality quartz ores with complex properties, the traditional hydrofluoric acid method uses hydrofluoric acid as the activator of feldspar and a cationic collector to preferentially select feldspar under acidic pulp conditions, thereby achieving the flotation separation of quartz and feldspar. Although the hydrofluoric acid method is mature in technology and has significant separation effects, it is no longer recognized by industrial production because hydrofluoric acid is extremely harmful to the human body and has a bad impact on the environment. At present, the fluorine-free acid method is often used. This process uses strong acid to adjust the pH value of the pulp without adding hydrofluoric acid, and uses a single amine collector or a combination of anions and cations to preferentially select feldspar, thereby achieving the separation of quartz and feldspar. However, some of them have problems such as large dosage of reagents, high cost, high viscosity of flotation foam, poor separation effect, and difficulty in wastewater treatment. The traditional "fluorine-free and acid-free method" for flotation separation of feldspar and quartz has the problems of low efficiency and poor selectivity.

[0004] In the study of comprehensive recovery and utilization of quartz resources in granite tailings, the main minerals in lithium mica tailings are quartz and feldspar, and the flotation pH is usually 10-12. Usually, lithium mica is floated with a single amine collector under acidic conditions, but amine collectors have strong collection capacity and poor selectivity, and the concentrate grade and recovery rate are low. In addition, a large amount of alkaline reagents need to be added to the subsequent tailings flotation quartz to neutralize the acidic flotation environment. However, when using an anion-cation combination collector to float lithium mica, the environment is weakly alkaline, and the tailings can be directly used to float quartz, reducing the cost of reagents.

[0005] Studies have shown that the use of anionic and cationic collectors can achieve the separation of quartz and feldspar in lithium mica tailings. The anionic collector sodium oleate activates feldspar in the adsorption active area of ​​the amine cationic collector, making the floatability of quartz and feldspar more different. Chinese invention patent CN117101872A proposes a quartz feldspar alkali separation method and collector, the reagent adopts anionic and cationic compatibility, the SiO2 content of quartz concentrate is 96%, but this grade still does not meet the quality requirements of quartz concentrate; Chinese invention patent CN117258995B adopts flotation-hot pressing acid leaching process, the SiO2 content of quartz concentrate is 99.95%, but the hot pressing acid leaching of this process adopts hydrofluoric acid mixed acid, which does not conform to the concept of green environmental protection. Therefore, there is an urgent need for a collector that can be used for quartz forward and reverse flotation and a process method for flotation separation of feldspar and quartz that is fluorine-free, has high industrial application feasibility, is complete in process, and is green and efficient, which is of great significance to solving the comprehensive recovery and utilization of non-metallic resources in tailings. Summary of the invention

[0006] In view of the shortcomings of the prior art, the first object of the present invention is to provide a collector that can be used for forward and reverse flotation of quartz, the collector has strong stability, is easy to disperse, has good selectivity, and has strong adaptability to ore slimes; and in the mineral processing process, the collector can not only float quartz under weak alkaline conditions to achieve effective separation of quartz and feldspar, but also reverse float feldspar under strong acid conditions to achieve efficient purification of quartz, thereby improving the grade and yield of quartz concentrate.

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

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

[0009] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

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

[0011] The cationic collector is at least one of dodecylamine, coconut oil alkyl primary amine, octadecyl succinamide, and butyrylhydrazide;

[0012] The anionic collector is at least one of oleic acid, oxidized paraffin soap, cyclopentane acid soap, cotton oil soap, rosin soap, and sodium dodecyl sulfate;

[0013] The emulsifier is at least one of caprylic acid monoglyceride, lauric acid monoglyceride, sorbitan monostearate, and tributyl phosphate.

[0014] The collector CFLY-6 that can be used for quartz forward and reverse flotation 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.

[0015] The advantage of this collector is that through the synergistic effect of anionic and cationic collectors and emulsifiers, quartz can be floated under weak alkaline conditions of pH = 9 to 12 to achieve effective separation of quartz and feldspar, and feldspar can be reversely floated under strong acid conditions of pH = 1.5 to 3 to achieve efficient purification of quartz.

[0016] The present invention also provides a method for preparing the collector CFLY-6 that can be used for quartz forward and reverse flotation, comprising the following steps:

[0017] 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.

[0018] The present invention also provides an application of the collector CFLY-6 that can be used for quartz forward and reverse flotation in flotation recovery of quartz from quartz ore, 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 that can be used for quartz forward and reverse flotation to flotation and recover quartz in lepidolite tailings, the application can be 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.

[0020] Specifically, the lithium mica tailings are floated, including one weak alkali roughing selection, one weak alkali cleaning selection, at least two weak alkali scavenging selections, and at least two strong acid reverse flotation selections.

[0021] Specifically, the weak alkali roughing process includes: sequentially adding a pH adjuster, an inhibitor, an activator and a collector CFLY-6 that can be used for quartz forward and reverse flotation into the lepidolite tailings slurry, and performing roughing to obtain a roughing concentrate and a roughing tailings.

[0022] Specifically, the weak alkaline scavenging process includes: sequentially adding a pH adjuster, an activator and a collector CFLY-6 that can be used for quartz forward and reverse flotation 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.

[0023] Specifically, the weak alkali concentration process includes: adding a pH adjuster and an inhibitor to the coarse concentrate, and obtaining a quartz coarse concentrate and a quartz middling after a primary concentration, and the quartz middling is sequentially returned to the previous level process.

[0024] Specifically, the strong acid reverse flotation process includes: adding sulfuric acid and collector CFLY-6 that can be used for quartz forward and reverse flotation to the quartz rough concentrate in sequence, undergoing at least two strong acid reverse flotations, the flotation tank contains quartz concentrate, and the two reverse flotation foams and weak alkali scavenging tailings are combined into tailings.

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

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

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

[0028] Specifically, the inhibitor 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, during the weak base roughing, weak base cleaning and weak base scavenging processes, the pH adjuster adjusts the pH of the system to 9-12; during the strong acid reverse flotation process, the pH adjuster adjusts the pH of the system to 1.5-3.

[0031] Specifically, in the weak base roughing, weak base concentrating and weak base scavenging stages, the amount of pH adjuster added is 100-600 g / t.

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

[0033] Specifically, in the weak base roughing, weak base cleaning and weak base scavenging stages, the inhibitor addition amount is 50-200 g / t.

[0034] Specifically, in the weak base roughing, weak base cleaning and weak base scavenging stages, the amount of activator added is 30-250 g / t.

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

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

[0037] Specifically, in the strong acid reverse flotation stage, the addition amount of the collector CFLY-6 that can be used for quartz forward and reverse flotation is 20 to 150 g / t.

[0038] The collector CFLY-6 used for quartz forward and reverse flotation of the present invention, under strong acid conditions, the surface of feldspar is negatively charged, while the surface of quartz is positively charged, the collector can be electrostatically adsorbed to the surface of feldspar, while quartz and the collector are not easily electrostatically adsorbed at this time, thereby achieving quartz flotation purification. Compared with a single collector, CFLY-6 has the characteristics of low surface tension and strong surface activity. After being adsorbed on the mineral surface, the particles are more hydrophobic. Under strong alkaline conditions, the cationic collector components and the anionic collector components are complexed with each other through electrostatic attraction or hydrophobic interaction between carbon chains to form molecule-ion association complexes, which are selectively physically adsorbed on the surface of quartz particles. The surface carbon chain density and height are increased through synergistic effects, making the surface hydrophobic adsorption layer more stable; the emulsifier can transform the collector solution system into a continuous phase structured microemulsion, enhance the content of molecule-ion association complexes in the agent, accelerate the dispersion speed of the agent in the slurry system, and shorten the time it takes for the agent to complete adsorption on the mineral surface. The agent has a good collection effect and significantly improves the recovery rate and grade of quartz concentrate products.

[0039] The method for flotation recovery of quartz in lithium mica tailings based on the collector that can be used for quartz forward and reverse flotation can be directly connected to the lithium mica weak alkaline flotation process without secondary grinding treatment, and has the advantages of low reagent dosage, simple process, high purity of the obtained quartz concentrate, etc. The purity of the quartz concentrate separated from the lithium mica tailings is above 97.5% and can reach 99.5%.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The collector of the present invention has the advantages of simple preparation, no need for heating and strong stirring, good stability, low temperature resistance, strong selectivity and good dispersion effect. Based on the synergistic effect between the components, the collector can effectively modify the surface of quartz under weak alkaline conditions, promote the hydrophobicity of the surface of quartz ore, thereby realizing the flotation separation of feldspar and quartz; under strong acidic conditions, it can effectively modify the surface of feldspar to achieve whitening and purification of quartz concentrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The present invention is a schematic diagram of the entire process of a method for flotation recovery of quartz from lepidolite tailings based on a collector that can be used for forward and reverse flotation of quartz.

[0043] Figure 2 It is a schematic diagram of the entire process of the method for purifying quartz by reverse flotation in quartz ore based on a collector that can be used for forward and reverse flotation of quartz. DETAILED DESCRIPTION

[0044] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Without departing from the spirit and essence of the present invention, the modifications or replacements made to the steps or conditions of the method of the present invention all belong to the scope of the present invention. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0045] Example 1

[0046] The collector CFLY-6 that can be used for quartz forward and reverse flotation 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 dodecyl 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 butyrylhydrazide, 20 parts of oleic acid, 20 parts of sodium coconut oil 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 lithium mica ore in the present embodiment is a low-grade lithium mica ore in Chenzhou City, Hunan Province, with a raw ore Li2O content of 0.38%, and main mineral compositions of quartz 45.88%, topaz 11.25%, mica 24.61%, kaolinite 8.55%, albite 2.48%, and microcline 7.23%. The lithium mica ore is subjected to desludging, coarse, fine, and sweeping to obtain lithium mica concentrate and lithium mica tailings, wherein the lithium mica concentrate has a grade of 1.52%, a recovery rate of 85%, and SiO2 content of 77.1% in the lithium mica tailings.

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

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

[0051] In the roughing operation, 300 g / t of sodium carbonate and 400 g / t of sodium hydroxide were added, and the pulp 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 collector CFLY-6, which can be used for quartz forward and reverse flotation, was added and stirred for 5 minutes, and then aeration and scraping were performed. The flotation time was 5 minutes to obtain roughing concentrate and roughing tailings;

[0052] The roughing tailings were subjected to two scavenging operations: adding 100g / t of sodium hydroxide and stirring for 3min; adding 150g / t of inhibitor starch and stirring for 3min; adding 50g / t of activator magnesium chloride and stirring for 3min; adding 50g / t of CFLY-6 and stirring for 3min, then aerating and scraping operation was performed, and the flotation time was 3min to obtain scavenged ore and scavenged tailings, and the scavenged ore was returned to the previous level in sequence;

[0053] The coarse concentrate is subjected to a first concentration operation, and 100 g / t of inhibitor starch is added, stirred for 3 minutes, and flotated for 4 minutes to obtain quartz coarse concentrate, and the quartz middlings are returned to the rougher selection;

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

[0055] The first time, 150g / t of sulfuric acid was added, the pulp was adjusted for 5 minutes, and the flotation pH value was 2; 50g / t of CFLY-6 quartz collector was added, and the mixture was stirred for 3 minutes and then aerated and scraped, and the flotation time was 3 minutes; the second time, 50g / t of sulfuric acid was added, the pulp was adjusted for 3 minutes, and the flotation pH value was 2; 30g / t of CFLY-6 quartz collector was added, and the mixture was stirred for 3 minutes and then aerated and scraped, and the flotation time was 3 minutes. The reverse flotation foam obtained twice was combined with the scavenging tailings as tailings, and the flotation tank contained quartz concentrate;

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

[0057] After steps (1) to (3), CFLY-6 is used as the lithium mica tailings quartz collector to obtain a high-purity quartz product with a SiO2 content of 99.52% and a yield of 18.67%.

[0058] Comparative Example 1

[0059] Compared with Example 1, the difference of this comparative example is that the weak alkaline flotation operation process adjusts the flotation pH to 8, specifically, 100 g / t of sodium carbonate and 50 g / t of sodium hydroxide are added to the lithium mica tailings slurry in sequence to adjust the pH value to 8, and the sodium carbonate and sodium hydroxide are allowed to react with the flotation slurry for 3 minutes.

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

[0061] Comparative Example 2

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

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

[0064] Comparative Example 3

[0065] Compared with Example 1, the difference of this comparative example is that the quartz concentrate is no longer subjected to wet high-intensity magnetic separation and gravity separation.

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

[0067] Comparative Example 4

[0068] Compared with Example 1, the difference of this comparative example is that the dosage of the inhibitor is reduced in the weak alkali flotation operation process, specifically, the weak alkali roughing is changed to adding 100g / t of starch, the weak alkali scavenging is changed to adding 50g / t of starch, and the weak alkali concentrating is changed to adding 20g / t of starch, and the action time is 3min.

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

[0070] Comparative Example 5

[0071] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, specifically, by weight, 7 parts of dodecylamine, 5 parts of coconut alkyl primary amine, 5 parts of oleic acid, 3 parts of sodium dodecyl sulfate, 4 parts of sodium coconut oil hydroxyethyl sulfonate, and 10 parts of Tween 80. The prepared collector is recorded as CFLY-6B.

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

[0073] Comparative Example 6

[0074] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, wherein the types of cationic collectors and anionic collectors are different, and no emulsifier is added, specifically: by weight, 7 parts of dodecylamine, 5 parts of octadecyl succinamide, 5 parts of oleic acid, 3 parts of cotton oil soap, and 4 parts of sodium cocoyl hydroxyethyl sulfonate. The prepared quartz collector is recorded as CFLY-6C.

[0075] The purity of the final quartz product obtained in this comparative example is 76.8%, and the yield is 21.37%.

[0076] Comparative Example 7

[0077] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, and no emulsifier is added. Specifically, 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, and 8 parts of sodium dodecyl sulfate are used. The prepared collector is recorded as CFLY-6D.

[0078] The purity of the final quartz product obtained in this comparative example is 78.4%, and the yield is 22.49%.

[0079] Comparative Example 8

[0080] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, and no cationic collector is added. Specifically, by weight, 8 parts of oleic acid, 4 parts of cotton oil soap, 4 parts of rosin soap, 6 parts of sodium dodecyl sulfate, 10 parts of Tween 80, and 5 parts of tributyl phosphate. The prepared collector is recorded as CFLY-6E.

[0081] The purity of the final quartz product obtained in this comparative example is 79.6%, and the yield is 27.49%.

[0082] Comparative Example 9

[0083] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, and no anionic collector is added. Specifically, by weight, 5 parts of coconut alkyl primary amine, 5 parts of Tween 80, and 5 parts of tributyl phosphate are used. The prepared collector is recorded as CFLY-6F.

[0084] The purity of the final quartz product obtained in this comparative example is 80.7%, and the yield is 14.79%.

[0085] Comparative Example 10

[0086] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, and no anionic collector and emulsifier are added. Specifically, by weight, 15 parts of oleic acid, 5 parts of cotton oil soap, 5 parts of rosin soap, and 5 parts of sodium dodecyl sulfate are used. The prepared collector is recorded as CFLY-6G.

[0087] The purity of the final quartz product obtained in this comparative example is 78.4%, and the yield is 24.87%.

[0088] Comparative Example 11

[0089] Compared with Example 1, the difference of this comparative example is that the composition of the collector is different, and no anionic collector and emulsifier are added. Specifically, by weight, 2 parts of dodecylamine and 1 part of coconut oil alkyl primary amine are used. The prepared collector is recorded as CFLY-6H.

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

[0091] Example 2

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

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

[0094] Example 3

[0095] Compared with Example 1, the difference of this example is that the composition of the collector is different, specifically, by weight, 2 parts of dodecylamine, 3 parts of coconut oil alkyl primary amine, 15 parts of oleic acid, 3 parts of cotton oil soap, 3 parts of rosin soap, 5 parts of glycerol, and 5 parts of Tween 80. The prepared collector is recorded as CFLY-6-2.

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

[0097] Example 4

[0098] This example shows the application of quartz collector CFLY-6 in quartz ore. Figure 2 Schematic diagram of the entire process of this embodiment.

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

[0100] (1) Grind the quartz ore to -0.074 mm with a content of 55% to obtain ore slurry.

[0101] (2) Desludging of the ore slurry. In the laboratory, sedimentation desludging is used, while in the industry, classification or cyclone desludging is used to remove kaolin from the quartz ore.

[0102] (3) Both reverse flotation operations were performed by adding sulfuric acid, inhibitor, and CFLY-6 in sequence, stirring for 3 minutes, and then aerating and scraping. The flotation pH was 2.5, and the flotation time was 3 minutes. Tailings and quartz rough concentrate were obtained. The amount of each reagent added was:

[0103] The 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 -0.074 mm product, which is referred to as quartz concentrate 1; and a +0.074 mm product, which is referred to as quartz concentrate.

[0106] (5) The quartz concentrate is subjected to wet strong 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 material is connected to the tailings, and the non-magnetic material enters the next separation.

[0107] (6) The non-magnetic material is roasted at a temperature of 900°C for 5 hours, followed by water quenching.

[0108] (7) The quenched material is subjected to acid leaching, wherein the acid used for the acid leaching is one of sulfuric acid and hydrochloric acid, the acid leaching temperature is 80° C., the leaching time is 6 h, and the liquid-to-solid ratio is 10:1.

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

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

[0111] Example 5

[0112] The process of this embodiment is basically the same as that of embodiment 4, except that starch is replaced with oxalic acid and sodium hexametaphosphate is replaced with water glass.

[0113] Through this embodiment, a high-purity quartz product can be obtained, and the SiO2 content of the quartz product reaches 98.9% and the yield is 32.59%.

[0114] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

Claims

1. A collector CFLY-6 that can be used for quartz forward and reverse flotation, characterized in that: The composition is as follows: 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, octadecyl succinamide, and butyrylhydrazide; The anionic collector is at least one of oleic acid, oxidized paraffin soap, cyclopentane acid soap, cotton oil soap, rosin soap, and sodium dodecyl sulfate; The emulsifier is at least one of glycerol, Tween 80, isooctyl alcohol polyoxyethylene polyoxypropylene ether, and tributyl phosphate.

2. The collector CFLY-6 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. A method for preparing the collector CFLY-6 according to any one of claims 1 to 2, comprising 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. An application of the collector CFLY-6 as claimed in any one of claims 1 to 2 or the collector CFLY-6 prepared by the preparation method according to claim 3 in flotation recovery of quartz from quartz ore, lepidolite tailings, spodumene tailings, tantalum-niobium tailings or tungsten-tin tailings.

5. The use according to claim 4, characterized in that: The application of the collector CFLY-6 in flotation recovery of quartz in lepidolite tailings can be followed by the lepidolite weak-base flotation process, including: continuing to sequentially perform flotation, gravity separation and magnetic separation operations on the lepidolite tailings.

6. The use according to claim 5, characterized in that: The lithium mica tailings are floated, including: one weak alkali roughing, one weak alkali cleaning, at least two weak alkali sweeping, at least two strong acid reverse flotation; The weak alkali roughing process comprises: sequentially adding a pH adjuster, an inhibitor, an activator and the collector CFLY-6 to the lepidolite tailings slurry, and roughing to obtain a roughing concentrate and a roughing tailings; The weak alkali scavenging process is: adding a pH adjuster, an activator and the collector CFLY-6 to the roughing tailings in sequence, 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 alkali concentration process is as follows: pH adjuster and inhibitor are added to the coarse concentrate, and after one concentration, quartz coarse concentrate and quartz middlings are obtained, and the quartz middlings are sequentially returned to the previous level process; The strong acid reverse flotation process is: sulfuric acid and the collector CFLY-6 are sequentially added to the quartz rough 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 alkali scavenging tailings are combined into tailings.

7. The use according to claim 6, 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.

8. The use according to claim 6, characterized in that: During the weak base roughing, weak base cleaning and weak base scavenging processes, the pH adjuster adjusts the pH of the system to 9-12; during the strong acid reverse flotation process, the pH adjuster adjusts the pH of the system to 1.5-3; In the weak base roughing, weak base concentrating 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.

9. 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.

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

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