High-efficiency multifunctional slurry conditioning agent as well as preparation method and application thereof

Abstract

The invention relates to a high-efficiency multifunctional slurry conditioning agent as well as a preparation method and application thereof. The efficient multifunctional slurry conditioning agent comprises 10-15 parts of a carbon chain zwitterionic surfactant. 60 to 70 parts of polyacrylamide; 14-25 parts of an inorganic salt auxiliary agent; and 0.5 to 1.0 part of an amino coupling agent. When the efficient multifunctional slurry conditioning agent disclosed by the invention is used for ore washing and mineral separation mineral slurry filter pressing and sewage flocculation treatment, the long-carbon-chain zwitterionic surfactant is compounded with the polyacrylamide, the inorganic salt additive and the amino coupling agent, so that the high-efficiency multifunctional slurry conditioning agent is prepared on the premise that the existing filtering equipment and process conditions are not changed; the purposes of improving the filter pressing efficiency and reducing the flocculating settling time can be achieved, the washing production efficiency can be effectively improved, and then the requirement of the mining industry for a water treatment auxiliary agent is met.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment additives, and in particular to a high-efficiency multifunctional mud conditioner and a preparation method and application thereof. Background Art

[0002] With the rapid development of the mining industry in many aspects, there are higher expectations for saving water resources and recycling water for reuse. Coal mines, iron mines, copper mines, aluminum mines, zinc mines and other ore washing and beneficiation will carry out mineral slurry filtration and sewage flocculation and dehydration treatment processes.

[0003] At present, the mineral mud filter pressing and sewage flocculation treatment processes need to add corresponding water treatment additives respectively. That is, the flocculation treatment of sewage is mostly treated with traditional flocculants such as high molecular weight polyacrylamide and polyaluminum chloride. The mineral mud filter pressing process is also treated with a filter aid composed of inorganic salts and polymers. However, the function is single, and the flocculation effect and filter pressing effect are not ideal, resulting in low washing and selection production efficiency, which cannot meet the requirements of the mining industry for water treatment additives. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a high-efficiency multifunctional mud conditioner and a preparation method and application thereof.

[0005] According to a first aspect of an embodiment of the present disclosure, a high-efficiency multifunctional mud conditioner is provided, wherein the high-efficiency multifunctional mud conditioner comprises the following raw materials and their weight proportions:

[0006]

[0007] In some possible implementations, the number of carbon atoms in the long carbon chain of the long carbon chain zwitterionic surfactant is 12-18.

[0008] In some possible embodiments, the long carbon chain in the long carbon chain zwitterionic surfactant is a straight chain alkyl chain or a branched chain alkyl chain.

[0009] In some possible embodiments, the long carbon chain zwitterionic surfactant is one or more of carboxylic acid betaine, sulfonic acid betaine, phosphate betaine or amine oxide.

[0010] In some possible embodiments, the carbon number of the alkyl chain of the carboxylic acid betaine is 12 to 18, and the general chemical structure formula of the carboxylic acid betaine is:

[0011]

[0012] Where: R = C n H (2n+1) , n=12-18.

[0013] In some possible embodiments, the alkyl chain carbon number of the sulfonate betaine is 12 to 18, and the chemical structure formula of the sulfonate betaine is:

[0014]

[0015] Where: R = C n H (2n+1) , n=12-18.

[0016] In some possible embodiments, the carbon number of the alkyl chain of the phosphate betaine is 12 to 18, and the general chemical structure formula of the phosphate betaine is:

[0017]

[0018] Where: R = C n H (2n+1) , n=12-18.

[0019] In some possible embodiments, the alkyl chain carbon number of the amine oxide is 12 to 18, and the chemical structure of the amine oxide is generally:

[0020]

[0021] Where: R = C n H (2n+1) , n=12-18, R1, R2 are CH3 or CH3CH2OH.

[0022] In some possible implementations, the polyacrylamide is anionic polyacrylamide or nonionic polyacrylamide.

[0023] In some possible implementations, the molecular weight of the polyacrylamide is greater than or equal to 15 million.

[0024] In some possible implementations, the inorganic salt auxiliary agent is one or both of calcium chloride and magnesium chloride.

[0025] In some possible implementations, the inorganic salt auxiliary agent is aluminum sulfate.

[0026] In some possible implementations, the amino coupling agent is a thioglycolic acid aminated organic coupling agent.

[0027] According to a second aspect of an embodiment of the present disclosure, there is provided a method for preparing a high-efficiency multifunctional mud conditioner as in any embodiment of the first aspect, the method comprising: step S1: weighing 10-15 parts of a long-chain zwitterionic surfactant, 60-70 parts of polyacrylamide, 14-25 parts of an inorganic salt additive, and 0.5-1.0 parts of an amino coupling agent for use; step S2: adding the long-chain zwitterionic surfactant and the inorganic salt additive in the above-mentioned parts by weight to a mixing device and stirring until the mixture is uniform, to obtain a first mixture; and step S3: adding the polyacrylamide and the amino coupling agent in the above-mentioned parts by weight in sequence, mixing with the first mixture and stirring until the mixture is uniform, to obtain a high-efficiency multifunctional mud conditioner.

[0028] In some possible embodiments, the step S2 includes: step S21: adding the above-mentioned weight proportions of the long-chain zwitterionic surfactant and the inorganic salt additive into a mixing device for mixing; step S22: stirring and mixing the long-chain zwitterionic surfactant and the inorganic salt additive at normal temperature and pressure, and the stirring and mixing time shall not be less than 30 minutes, to obtain a first mixture.

[0029] In some possible embodiments, the step S3 includes: step S31: adding the polyacrylamide and the amino coupling agent in the above-mentioned weight proportions to a mixing device in sequence, and mixing them with the first mixture; step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at normal temperature and pressure, and the stirring and mixing time shall not be less than 30 minutes, to obtain a high-efficiency and multifunctional mud conditioner.

[0030] In some possible implementations, the mixing device includes any one of a spiral mixer, a free-fall mixer, a forced stirring mixer and a stirred tank.

[0031] According to a third aspect of the embodiments of the present disclosure, there is provided an application of a high-efficiency multifunctional mud conditioner as described in any embodiment of the first aspect in mud filtration and sewage flocculation and dewatering in ore washing and beneficiation.

[0032] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: the high-efficiency multifunctional mud conditioner disclosed in the present disclosure includes a long carbon chain zwitterionic surfactant, polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent. When the high-efficiency multifunctional mud conditioner disclosed in the present disclosure is used for mineral mud filter pressing and sewage flocculation treatment of ore washing and ore dressing, the long carbon chain zwitterionic surfactant is compounded with polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent, which can change the zeta potential between fine particles in the ore washing and ore dressing wastewater and condense to enhance the flocculation effect, and can also change the interfacial tension between fine particles and water in the ore washing and ore dressing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid. Under the premise of not changing the existing filtering equipment and process conditions, the purpose of improving the filter press filtration efficiency and reducing the flocculation sedimentation time can be achieved, and the washing and dressing production efficiency can be effectively improved, thereby meeting the requirements of the mining industry for water treatment auxiliary agents.

[0033] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0035] Figure 1 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment.

[0036] Figure 2 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment.

[0037] Figure 3 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] With the rapid development of the mining industry in many aspects, there are higher expectations for saving water resources and recycling water for reuse. Coal mines, iron mines, copper mines, aluminum mines, zinc mines and other ore washing and beneficiation will carry out mineral slurry filtration and sewage flocculation and dehydration treatment processes.

[0040] For the treatment of ore washing and mineral processing wastewater, the particle size in the wastewater continues to decrease, and the hydration effect on the particle surface gradually becomes significant. In addition to the electrostatic repulsion, the hydration repulsion between particles becomes stronger, resulting in the stable suspension of fine or micro-nano-scale particles in the ore washing and mineral processing wastewater. Faced with ore washing and mineral processing wastewater with high solid suspended matter content and good stability, although the current commercially available products have taken these factors into consideration, only inorganic salts (electrolytes) are used to reduce the electric potential between particles and reduce part of the hydration repulsion, and the intended effect is not very significant.

[0041] In the related technology, the mineral mud filter pressing and sewage flocculation treatment processes need to add corresponding water treatment additives respectively. That is, the flocculation treatment of sewage is mostly treated with traditional flocculants such as high molecular weight polyacrylamide and polyaluminum chloride. The mineral mud filter pressing process is also treated with a filter aid composed of inorganic salts and polymers. However, the function is single, and the flocculation effect and filter pressing effect are not ideal, resulting in low washing and selection production efficiency, which cannot meet the requirements of the mining industry for water treatment additives.

[0042] Among them, in order to meet the current mining industry's demand for water treatment additives, efficient and multifunctional water treatment additives are constantly being improved.

[0043] In order to meet the current demand for water treatment additives in the mining industry, the embodiments of the present disclosure provide a highly efficient and multifunctional mud conditioner.

[0044] In one implementation of the disclosed embodiment, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0045]

[0046]

[0047] The high-efficiency multifunctional mud conditioner disclosed in the present invention includes a long carbon chain zwitterionic surfactant, polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent. When the high-efficiency multifunctional mud conditioner disclosed in the present invention is used for mineral mud filter pressing and sewage flocculation treatment of ore washing and ore dressing, the long carbon chain zwitterionic surfactant is compounded with polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent, which can not only change the zeta potential between the fine particles in the ore washing and ore dressing wastewater to condense and enhance the flocculation effect, but also change the interfacial tension between the fine particles and water in the ore washing and ore dressing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid. Under the premise of not changing the existing filtering equipment and process conditions, the purpose of improving the filter press filtration efficiency and reducing the flocculation sedimentation time can be achieved, and the washing and dressing production efficiency can be effectively improved, thereby meeting the requirements of the mining industry for water treatment auxiliary agents.

[0048] In one implementation of the disclosed embodiments, the number of carbon atoms in the long carbon chain of the long carbon chain zwitterionic surfactant is 12-18.

[0049] Among them, long carbon chain zwitterionic surfactants are substances with amphiphilic properties, that is, they have a "hydrophilic" head group and a "hydrophobic" tail.

[0050] In one case, a long carbon chain zwitterionic surfactant with 12 carbon atoms is used, and then polyacrylamide, inorganic salt additives and amino coupling agents are compounded. This can not only change the zeta potential between the fine particles in the ore washing and mineral processing wastewater to cause coagulation and enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and enhance the filtration effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filtration.

[0051] In another case, a long carbon chain zwitterionic surfactant with 14 carbon atoms is used, and then compounded with polyacrylamide, inorganic salt additives and amino coupling agents. This can not only change the zeta potential between the fine particles in the ore washing and mineral processing wastewater to cause coagulation and enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and enhance the filtration effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filtration.

[0052] In another case, a long carbon chain zwitterionic surfactant with 16 carbon atoms is used, and then compounded with polyacrylamide, inorganic salt additives and amino coupling agents. This can not only change the zeta potential between the fine particles in the ore washing and mineral processing wastewater to cause coagulation and enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and enhance the filtration effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filtration.

[0053] In another case, a long carbon chain zwitterionic surfactant with 18 carbon atoms is used, and then compounded with polyacrylamide, inorganic salt additives and amino coupling agents. This can not only change the zeta potential between the fine particles in the ore washing and mineral processing wastewater and cause coagulation to enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and enhance the filtration effect without affecting the flocculation effect, so that the high-efficiency and multifunctional mud conditioner has multiple functions of flocculation and filtration.

[0054] In the disclosed embodiment, the carbon number of the long carbon chain is 12-18, and the long carbon chain zwitterionic surfactant has a long chain structure. These long chains can adsorb multiple suspended particles at the same time, connecting the suspended particles like a bridge to form a larger floc. That is, the fine particles in the ore washing and mineral processing wastewater are formed into flocs by the long carbon chain zwitterionic surfactant in the form of bridging connection, and then compounded with polyacrylamide, inorganic salt additives and amino coupling agents, which can not only change the zeta potential between the fine particles in the ore washing and mineral processing wastewater and condense, enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid.

[0055] In one implementation of the disclosed embodiments, the long carbon chain in the long carbon chain zwitterionic surfactant is a straight chain alkyl chain or a branched chain alkyl chain.

[0056] It should be noted that a "straight alkyl chain" refers to an alkyl chain without branches. A "branched alkyl chain" refers to an alkyl chain with one or more branches, including an alkyl chain with a straight chain portion and a branched chain portion.

[0057] Exemplarily, the long carbon chain in the long carbon chain zwitterionic surfactant is a straight alkyl chain. The long carbon chain of the straight alkyl chain can adsorb multiple suspended particles at the same time to form a larger floc. Then compound polyacrylamide, inorganic salt additives and amino coupling agents complement each other, synergistically change the zeta potential between the fine particles in the ore washing and mineral processing wastewater and condense, enhance the flocculation effect, and change the interfacial tension between the fine particles and water in the ore washing and mineral processing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid.

[0058] Exemplarily, the long carbon chain in the long carbon chain zwitterionic surfactant is a branched alkyl chain. The long carbon chain of the branched alkyl chain can adsorb multiple suspended particles at the same time to form a larger floc. Then compound polyacrylamide, inorganic salt additives and amino coupling agents complement each other, synergistically change the zeta potential between the fine particles in the ore washing and mineral processing wastewater and condense, enhance the flocculation effect, and change the interfacial tension between the fine particles and water in the ore washing and mineral processing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid.

[0059] In one implementation of the disclosed embodiments, the long carbon chain zwitterionic surfactant is one or more of carboxylic acid betaine, sulfonic acid betaine, phosphate betaine or amine oxide.

[0060] Among them, the anion in the carboxylic acid betaine molecule is a carboxyl group, and the cation is a quaternary ammonium group. In an acidic medium, when the pH of the isoelectric point is smaller, the carboxylic acid betaine behaves as a cationic surfactant soluble in water. In a neutral or alkaline medium, that is, when the pH is the same as or greater than the isoelectric point, the carboxylic acid betaine behaves as a water-soluble amphoteric surfactant, and does not behave as an anionic surfactant. Amphoteric surfactants are only easy to precipitate with anionic surfactants in acidic media. In media of various pH values, carboxylic acid betaine can be used in combination with any type of surfactant.

[0061] The anionic sulfonyl group in the sulfonic acid betaine molecule and the cation is a quaternary ammonium group. Sulfonic acid betaine has all the advantages of amphoteric surfactants, and is resistant to high concentrations of acid and alkali salts, has good emulsification, dispersibility and antistatic properties, as well as bactericidal, antifungal and viscoelastic properties, etc., because of the anionic and cationic groups with hydroxyl groups in the structure.

[0062] The anionic phosphate group in the phosphate betaine molecule is a quaternary ammonium group, and the cation is a quaternary ammonium group. Phosphate betaine not only has the excellent wettability, cleaning, solubilization, emulsification and dispersibility, antistatic property, thermal stability, etc. of amphoteric surfactants, as well as good compatibility, low irritation, and superior alkali resistance, electrolyte resistance and antistatic properties, but also has strong calcium soap dispersibility, low surface tension, and excellent foaming properties.

[0063] The oxygen in the amine oxide molecule carries more negative charges and can combine with hydrogen protons, making it a weak base, but its alkalinity is weaker than that of the parent tertiary amine. The weak alkalinity of amine oxide makes it non-ionic in neutral and alkaline solutions and cationic in acidic media.

[0064] In the embodiments of the present disclosure, a long carbon chain zwitterionic surfactant having 12-18 carbon atoms is used and compounded with polyacrylamide, inorganic salt and amino coupling agent to synergistically play multiple roles of flocculation and filtration aid in the treatment of ore washing and beneficiation wastewater.

[0065] In one embodiment of the present disclosure, the carbon number of the alkyl chain of the carboxylic acid betaine is 12 to 18, and the chemical structure formula of the carboxylic acid betaine is:

[0066]

[0067] Where: R = C n H (2n+1) , n=12-18.

[0068] In the disclosed embodiment, a carboxylic acid type betaine having an alkyl chain carbon number of 12 to 18 is used. Such a setting can not only reduce the zeta potential between the fine particles in the ore washing and mineral processing wastewater and enhance the flocculation effect, but also change the interfacial tension between the fine particles and water in the ore washing and mineral processing wastewater, increase the hydration repulsion, and increase the filtration speed without affecting the balance of the lipophilic and hydrophilic values. At the same time, larger gaps are formed between the fine particles in the ore washing and mineral processing wastewater, thereby increasing the looseness of the fine particle stacking, thereby reducing the moisture content of the filter cake, and enhancing the filtration aid effect without affecting the flocculation effect, so that the high-efficiency and multifunctional mud conditioner has multiple functions of flocculation and filtration aid.

[0069] In one embodiment of the present disclosure, the carbon number of the alkyl chain of sulfonate betaine is 12 to 18, and the general chemical structure formula of sulfonate betaine is:

[0070]

[0071] Where: R = C n H (2n+1) , n=12-18.

[0072] In the disclosed embodiment, sulfonic acid betaine with an alkyl chain carbon number of 12-18 is used. Such a setting can not only reduce the zeta potential between the fine particles in the ore washing and mineral processing wastewater and enhance the flocculation effect, but also change the interfacial tension between the fine particles and water in the ore washing and mineral processing wastewater, increase the hydration repulsion, and increase the filtration speed without affecting the balance of the lipophilic and hydrophilic values. At the same time, larger gaps are formed between the fine particles in the ore washing and mineral processing wastewater, thereby increasing the looseness of the fine particle stacking, thereby reducing the moisture content of the filter cake, and enhancing the filtration aid effect without affecting the flocculation effect, so that the high-efficiency and multifunctional mud conditioner has multiple functions of flocculation and filtration aid.

[0073] In one embodiment of the present disclosure, the carbon number of the alkyl chain of the phosphate betaine is 12 to 18, and the general chemical structure formula of the phosphate betaine is:

[0074]

[0075] Where: R = C n H (2n+1) , n=12-18.

[0076] In the disclosed embodiments, phosphate-type betaine with an alkyl chain carbon number of 12-18 is used. Such a setting can not only reduce the zeta potential between the fine particles in the ore washing and mineral processing wastewater and enhance the flocculation effect, but also change the interfacial tension between the fine particles and water in the ore washing and mineral processing wastewater, increase the hydration repulsion, and increase the filtration speed without affecting the balance of the lipophilic and hydrophilic values. At the same time, larger gaps are formed between the fine particles in the ore washing and mineral processing wastewater, thereby increasing the looseness of the fine particle stacking, thereby reducing the moisture content of the filter cake, and enhancing the filtration aid effect without affecting the flocculation effect, so that the high-efficiency and multifunctional mud conditioner has multiple functions of flocculation and filtration aid.

[0077] In one embodiment of the present disclosure, the carbon number of the alkyl chain of the amine oxide is 12 to 18, and the general chemical structure formula of the amine oxide is:

[0078]

[0079] Where: R = C n H (2n+1) , n=12-18, R1, R2 are CH3 or CH3CH2OH.

[0080] In the disclosed embodiments, an amine oxide having an alkyl chain carbon number of 12-18 is used. Such a setting can not only reduce the zeta potential between the fine particles in the ore washing and mineral processing wastewater and enhance the flocculation effect, but also change the interfacial tension between the fine particles in the ore washing and mineral processing wastewater and water, increase the hydration repulsion, and increase the filtration speed without affecting the balance of the lipophilic and hydrophilic values. At the same time, larger gaps are formed between the fine particles in the ore washing and mineral processing wastewater, thereby increasing the looseness of the fine particle stacking, thereby reducing the moisture content of the filter cake, and enhancing the filtration aid effect without affecting the flocculation effect, so that the high-efficiency and multifunctional mud conditioner has multiple functions of flocculation and filtration aid.

[0081] In one implementation of the disclosed embodiment, the polyacrylamide is anionic polyacrylamide or nonionic polyacrylamide.

[0082] Among them, polyacrylamide (PAM) is a water-soluble high molecular polymer with good flocculation properties, which can reduce the friction resistance between liquids. Polyacrylamide can be divided into four types according to its ionic properties: non-ionic polyacrylamide, anionic polyacrylamide, cationic polyacrylamide and amphoteric polyacrylamide. When used for flocculation, it is related to the surface properties of the flocculated material, especially the zeta potential, viscosity, turbidity and pH value of the suspension. The zeta potential on the particle surface is the reason for the particle inhibition. Adding polyacrylamide PAM with opposite surface charge can reduce the zeta potential and cause aggregation.

[0083] In the embodiments of the present disclosure, anionic polyacrylamide or nonionic polyacrylamide is used in conjunction with long-chain zwitterionic surfactants, inorganic salt additives and amino coupling agents to reduce the zeta potential between particles in the ore washing and mineral processing wastewater and cause coagulation, thereby enhancing the flocculation effect, changing the interfacial tension between particles and water in the ore washing and mineral processing wastewater, and increasing the water repellency, without affecting the flocculation and at the same time achieving a significant filtering effect.

[0084] In one implementation of the disclosed embodiment, the molecular weight of the polyacrylamide is greater than or equal to 15 million.

[0085] It is understandable that the larger the molecular weight of polyacrylamide, the stronger its flocculation ability. A molecular weight below 15 million will result in substandard flocculation ability.

[0086] In the disclosed embodiment, the molecular weight of polyacrylamide is greater than or equal to 15 million. On the one hand, the larger the molecular weight of polyacrylamide, the higher its cost. On the other hand, if the flocculation ability of polyacrylamide is too strong, it will flocculate the inorganic salt additive together, and the inorganic salt additive will not be able to play a role, thereby affecting the synergistic effect of the inorganic salt additive.

[0087] In one implementation of the disclosed embodiment, the inorganic salt additive is one or both of calcium chloride and magnesium chloride.

[0088] It should be noted that the addition of inorganic salt additives is mainly to reduce costs and avoid increasing costs due to the molecular weight of polyacrylamide being too large.

[0089] Due to the presence of long carbon chain zwitterionic surfactants, chloride ions can only appear together with divalent cations so as not to change the interfacial tension between the solid and liquid, and thus not to destroy the balance of the lipophilic and hydrophilic values.

[0090] In the embodiments of the present disclosure, the inorganic salt additive is calcium chloride or the inorganic salt additive is magnesium chloride or the inorganic salt additive is calcium chloride and magnesium chloride, which can be compounded with polyacrylamide and long-chain zwitterionic surfactants to reduce the electric potential between fine particles in ore washing and mineral processing wastewater, reduce hydration repulsion, break or weaken the hydration effect on the particle surface and enhance the bridging mechanism, and reduce costs.

[0091] In one implementation of the disclosed embodiment, the inorganic salt auxiliary agent is aluminum sulfate.

[0092] It should be noted that due to the presence of long carbon chain zwitterionic surfactants, sulfate ions can only appear simultaneously with trivalent cations so as not to change the interfacial tension of the solid-liquid and thus not to destroy the balance of the lipophilic and hydrophilic values.

[0093] In the embodiments of the present disclosure, the inorganic salt auxiliary agent is aluminum sulfate, which can be synergistically compounded with polyacrylamide and long-chain zwitterionic surfactants to reduce the electric potential between fine particles in ore washing and mineral processing wastewater and reduce hydration repulsion, while also being able to break or weaken the hydration effect on the particle surface and enhance the bridging mechanism, and can also reduce costs.

[0094] In one implementation of the disclosed embodiment, the amino coupling agent is a thioglycolic acid aminated organic coupling agent.

[0095] In the embodiments of the present disclosure, the amino functional groups in the amino coupling agent can form hydrogen bonds on the surface of fine particles in the ore washing and beneficiation wastewater, and cooperate with other components (long carbon chain zwitterionic surfactants, polyacrylamide and inorganic salt additives) to enhance the mutual attraction between particles and promote the occurrence of flocculation.

[0096] Based on the same concept, the present disclosure can provide a method for preparing a high-efficiency multifunctional mud conditioner, which is used to prepare the high-efficiency multifunctional mud conditioner in the above embodiments.

[0097] Figure 1 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment.

[0098] like Figure 1 As shown, a method for preparing a high-efficiency multifunctional mud conditioner comprises:

[0099] Step S1: Weigh 10-15 parts of a long carbon chain zwitterionic surfactant, 60-70 parts of polyacrylamide, 14-25 parts of an inorganic salt additive, and 0.5-1.0 parts of an amino coupling agent for later use.

[0100] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and inorganic salt auxiliary agent in parts by weight into a mixing device and stir until the mixture is uniform to obtain a first mixture.

[0101] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0102] The mixing device includes any one of a spiral mixer, a free-fall mixer, a forced stirring mixer and a stirring kettle.

[0103] The spiral mixer may be a conical spiral mixer or other types of spiral mixers, which is not limited in the embodiments of the present disclosure.

[0104] In the embodiments disclosed herein, when the high-efficiency multifunctional mud conditioner disclosed herein is used for mineral mud filter pressing and sewage flocculation treatment of ore washing and ore dressing, the long-chain zwitterionic surfactant is compounded with polyacrylamide, inorganic salt additive and amino coupling agent, which can change the zeta potential between fine particles in the ore washing and ore dressing wastewater and condense to enhance the flocculation effect, and can also change the interfacial tension between fine particles and water in the ore washing and ore dressing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid. Under the premise of not changing the existing filtering equipment and process conditions, the purpose of improving the filter press filtration efficiency and reducing the flocculation sedimentation time can be achieved, which can effectively improve the washing and dressing production efficiency, and thus meet the requirements of the mining industry for water treatment additives.

[0105] Figure 2 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment.

[0106] In one implementation of the present disclosure, Figure 2 As shown, step S2 includes:

[0107] Step S21: adding 10-15 parts of a long carbon chain zwitterionic surfactant and 14-25 parts of an inorganic salt auxiliary agent into a mixing device for mixing.

[0108] Step S22: stirring and mixing the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent at room temperature and pressure for a stirring and mixing time of not less than 30 minutes to obtain a first mixture.

[0109] The mixing device includes any one of a spiral mixer, a free-fall mixer, a forced stirring mixer and a stirring kettle.

[0110] The spiral mixer may be a conical spiral mixer or other types of spiral mixers, which is not limited in the embodiments of the present disclosure.

[0111] Exemplarily, step S21: 10 parts of a long carbon chain zwitterionic surfactant and 25 parts of an inorganic salt auxiliary agent are added into a conical spiral mixer for mixing.

[0112] Step S22: stirring and mixing the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent at room temperature and pressure for 30 minutes to obtain a first mixture.

[0113] Exemplarily, step S21: 15 parts of a long carbon chain zwitterionic surfactant and 14 parts of an inorganic salt auxiliary agent are added into a free fall mixer for mixing.

[0114] Step S22: stirring and mixing the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent at room temperature and pressure for 40 minutes to obtain a first mixture.

[0115] Exemplarily, step S21: 14 parts of a long carbon chain zwitterionic surfactant and 23 parts of an inorganic salt additive are added into a stirring tank for mixing.

[0116] Step S22: stirring and mixing the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent at room temperature and pressure for 45 minutes to obtain a first mixture.

[0117] In the embodiment of the present disclosure, the long-chain zwitterionic surfactant and the inorganic salt additive are first added into a mixing device for mixing, and the stirring and mixing time shall not be less than 30 minutes, so that the long-chain zwitterionic surfactant and the inorganic salt additive are fully mixed to obtain a first mixture.

[0118] Figure 3 It is a flow chart of a method for preparing a high-efficiency multifunctional mud conditioner according to an exemplary embodiment.

[0119] In one implementation of the present disclosure, Figure 3 As shown, step S3 includes:

[0120] Step S31: 60-70 parts of polyacrylamide and 0.5-1.0 parts of amino coupling agent are sequentially added into a mixing device and mixed with the first mixture.

[0121] Step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at room temperature and pressure for at least 30 minutes to obtain a high-efficiency multifunctional mud conditioner.

[0122] The mixing device includes any one of a spiral mixer, a free-fall mixer, a forced stirring mixer and a stirring kettle.

[0123] The spiral mixer may be a conical spiral mixer or other types of spiral mixers, which is not limited in the embodiments of the present disclosure.

[0124] Exemplarily, step S31: 64.5 parts of polyacrylamide and 0.5 parts of amino coupling agent are added into a conical spiral mixer in sequence, and mixed with the first mixture.

[0125] Step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at room temperature and pressure for 30 minutes to obtain a high-efficiency multifunctional mud conditioner.

[0126] Exemplarily, step S31: 70 parts of polyacrylamide and 1.0 part of amino coupling agent are added into a free fall mixer in sequence, and mixed with the first mixture.

[0127] Step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at room temperature and pressure for 40 minutes to obtain a high-efficiency multifunctional mud conditioner.

[0128] Exemplarily, step S31: 68 parts of polyacrylamide and 0.9 parts of amino coupling agent are added to a stirring tank in sequence, and mixed with the first mixture.

[0129] Step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at room temperature and pressure for 45 minutes to obtain a high-efficiency multifunctional mud conditioner.

[0130] In the embodiment of the present disclosure, polyacrylamide and amino coupling agent are added into a mixing device and mixed with the first mixture, and the stirring and mixing time shall not be less than 30 minutes, so that the first mixture, polyacrylamide and amino coupling agent are fully mixed and uniformly to obtain a high-efficiency and multifunctional mud conditioner.

[0131] Based on the same concept, the present disclosure can provide a high-efficiency multifunctional mud conditioner for use in mud filtration and sewage flocculation and dewatering in ore washing and mineral processing.

[0132] Compared with traditional filter presses, the high-efficiency multifunctional mud conditioner disclosed in the present invention can improve the mud filter press water discharge time efficiency by more than 30% based on 10t of sewage; compared with traditional sewage flocculants, the sewage flocculation and sedimentation time is shortened by 5 to 8 minutes, and the flocculation effect and filter press effect are significantly improved in the treatment process of ore washing and mineral processing wastewater.

[0133] The high-efficiency multifunctional mud conditioner disclosed in the present invention includes a long carbon chain zwitterionic surfactant, polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent. When the high-efficiency multifunctional mud conditioner disclosed in the present invention is used for mineral mud filter pressing and sewage flocculation treatment of ore washing and ore dressing, the long carbon chain zwitterionic surfactant is compounded with polyacrylamide, an inorganic salt auxiliary agent and an amino coupling agent, which can not only change the zeta potential between the fine particles in the ore washing and ore dressing wastewater to condense and enhance the flocculation effect, but also change the interfacial tension between the fine particles and water in the ore washing and ore dressing wastewater, increase the hydration repulsion, and enhance the filter aid effect without affecting the flocculation effect, so that the high-efficiency multifunctional mud conditioner has multiple functions of flocculation and filter aid. Under the premise of not changing the existing filtering equipment and process conditions, the purpose of improving the filter press filtration efficiency and reducing the flocculation sedimentation time can be achieved, and the washing and dressing production efficiency can be effectively improved, thereby meeting the requirements of the mining industry for water treatment auxiliary agents.

[0134] Several embodiments of the highly efficient and multifunctional mud conditioner disclosed herein will be described in detail below.

[0135] In the following examples, the experimental methods without specific conditions were selected or determined according to conventional methods and conditions.

[0136] In the following examples, unless otherwise specified, all experimental materials used are commercially available.

[0137] Embodiment 1

[0138] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0139]

[0140] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0141] Step S1: 15 parts of a long carbon chain zwitterionic surfactant, 70 parts of polyacrylamide, 14 parts of calcium chloride and 1.0 part of an amino coupling agent were weighed separately for use.

[0142] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and calcium chloride in parts by weight into a mixing device and stir until the mixture is uniform to obtain a first mixture.

[0143] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0144] Embodiment 2

[0145] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0146]

[0147]

[0148] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0149] Step S1: 13.8 parts of a long carbon chain zwitterionic surfactant, 69.4 parts of polyacrylamide, 16 parts of magnesium chloride, and 0.8 parts of an amino coupling agent were weighed separately for use.

[0150] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and magnesium chloride in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0151] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0152] Embodiment 3

[0153] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0154]

[0155] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0156] Step S1: 14.5 parts of a long carbon chain zwitterionic surfactant, 70 parts of polyacrylamide, 14.5 parts of aluminum sulfate, and 1.0 part of an amino coupling agent were weighed separately for use.

[0157] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and aluminum sulfate in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0158] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0159] Embodiment 4

[0160] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0161]

[0162] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0163] Step S1: 10 parts of a long carbon chain zwitterionic surfactant, 64.5 parts of polyacrylamide, 25 parts of calcium chloride, and 0.5 parts of an amino coupling agent were weighed separately for later use.

[0164] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and calcium chloride in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0165] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0166] Embodiment 5

[0167] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0168]

[0169] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0170] Step S1: 14.2 parts of a long carbon chain zwitterionic surfactant, 60 parts of polyacrylamide, 25 parts of calcium chloride, and 0.8 parts of an amino coupling agent were weighed separately for use.

[0171] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and calcium chloride in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0172] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0173] Embodiment 6

[0174] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0175]

[0176] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0177] Step S1: 11 parts of a long carbon chain zwitterionic surfactant, 70 parts of polyacrylamide, 18.3 parts of magnesium chloride, and 0.7 parts of an amino coupling agent were weighed separately for use.

[0178] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and magnesium chloride in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0179] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0180] Embodiment 7

[0181] According to one implementation of the present disclosure, the high-efficiency multifunctional mud conditioner includes the following raw materials and their weight proportions:

[0182] 12 parts of long carbon chain zwitterionic surfactant;

[0183] Polyacrylamide 67.3 parts;

[0184] 20 parts of aluminum sulfate;

[0185] 0.7 parts of amino coupling agent.

[0186] The high-efficiency multifunctional mud conditioner of this embodiment is prepared according to the following method:

[0187] Step S1: 12 parts of a long carbon chain zwitterionic surfactant, 67.3 parts of polyacrylamide, 20 parts of aluminum sulfate, and 0.7 parts of an amino coupling agent were weighed separately for use.

[0188] Step S2: Add the above-mentioned long carbon chain zwitterionic surfactant and aluminum sulfate in parts by weight into a stirring kettle and stir until they are uniformly mixed to obtain a first mixture.

[0189] Step S3: sequentially adding the above-mentioned polyacrylamide and amino coupling agent in parts by weight, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

[0190] The use of the high-efficiency multifunctional mud conditioner disclosed in the present invention is taken as an example, and the use of a commercially available product with a filtering aid or flocculation effect is taken as a comparative example. The following test comparison is performed on the example and the comparative example under the same conditions.

[0191] Table 1 shows the test results of filter press experiments using Example 1 and Example 4 of the present disclosure, commercial product (1), commercial product (2) and commercial product (3), respectively. Among them, the commercial products are three common regulators on the market.

[0192] Table 1 Comparison table of filter press test results (1)

[0193]

[0194] It can be seen from Table 1 that the wastewater was subjected to filter pressure treatment under the same feeding time (40s), the same feeding concentration (450.0g / L), the same amount of regulator added (1.0g / L) and the same filter cake thickness (42.0mm).

[0195] Compared with commercially available products, the high-efficiency multifunctional mud conditioner Examples 1 and 4 disclosed herein have the lowest filter cake moisture content, the highest filter press water output, and significantly improved filter press efficiency. Furthermore, the filter press water output is increased by 6%, and the filter cake moisture content is reduced by an average of 9%. This indicates that the high-efficiency multifunctional mud conditioner disclosed herein has a significant filter aid effect.

[0196] Table 2 shows the test results of filter press experiments using Example 1 and Example 4 of the present disclosure, commercial product (1), commercial product (2) and commercial product (3), respectively. Among them, the commercial products are three common regulators on the market.

[0197] Table 2 Comparison table of filter press test results (2)

[0198]

[0199] It can be seen from Table 2 that the wastewater is subjected to filter pressure treatment under the conditions of the same feed concentration (400.0 g / L), the same filter pressure (0.8 MPa) and the same cut-off water output (470.0 g).

[0200] Compared with commercially available products, the high-efficiency multifunctional mud conditioner Examples 1 and 4 disclosed herein have the lowest filter cake moisture content, greatly shorten the filtration time, and significantly improve the production efficiency. Furthermore, the filtration time is shortened by more than 40%, and the production efficiency is increased by 35-40%. This shows that the high-efficiency multifunctional mud conditioner disclosed herein has a significant filtration-aiding effect.

[0201] Table 3 shows the test results of flocculation experiments using Example 1 and Example 4 of the present disclosure, polyacrylamide, polyaluminum chloride and a commercially available composite flocculant.

[0202] Table 3 Flocculation test results comparison table (mud 20g / L)

[0203]

[0204] It can be seen from Table 3 that under the same feeding time (15s) and sedimentation time (20s), the same volume of wastewater (sludge 20g / L) was subjected to flocculation treatment.

[0205] Compared with polyacrylamide, polyaluminium chloride and commercially available composite flocculants, the high-efficiency multifunctional mud conditioner Examples 1 and 4 of the present disclosure have the largest amount of clean water, the least bottom mud, the highest clean water ratio, and improved flocculation effect. Furthermore, the flocculation water yield rate increased by 7.3%. This shows that the high-efficiency multifunctional mud conditioner of the present disclosure can also be used for flocculation water treatment, reflecting the multifunctionality of the present disclosure.

[0206] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0207] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0208] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0209] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0210] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0211] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0212] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A high-efficiency multifunctional mud conditioner, characterized in that: The high-efficiency multifunctional mud conditioner comprises the following raw materials and weight proportions:

2. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The number of carbon atoms in the long carbon chain of the long carbon chain zwitterionic surfactant is 12-18.

3. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The long carbon chain in the long carbon chain zwitterionic surfactant is a straight chain alkyl chain or a branched chain alkyl chain.

4. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The long carbon chain zwitterionic surfactant is one or more of carboxylic acid betaine, sulfonic acid betaine, phosphate betaine or amine oxide.

5. The high-efficiency multifunctional mud conditioner according to claim 4, characterized in that: The carbon number of the alkyl chain of the carboxylic acid betaine is 12 to 18, and the general chemical structure formula of the carboxylic acid betaine is: Where: R = C n H (2n+1) , n=12-18.

6. The high-efficiency multifunctional mud conditioner according to claim 4, characterized in that: The carbon number of the alkyl chain of the sulfonic acid betaine is 12 to 18, and the general chemical structure formula of the sulfonic acid betaine is: Where: R = C n H (2n+1) , n=12-18.

7. The high-efficiency multifunctional mud conditioner according to claim 4, characterized in that: The carbon number of the alkyl chain of the phosphate betaine is 12 to 18, and the general chemical structure formula of the phosphate betaine is: Where: R = C n H (2n+1) , n=12-18.

8. The high-efficiency multifunctional mud conditioner according to claim 4, characterized in that: The carbon number of the alkyl chain of the amine oxide is 12 to 18, and the general chemical structure formula of the amine oxide is: Where: R = C n H (2n+1) , n=12-18, R1, R2 are CH3 or CH3CH2OH.

9. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The polyacrylamide is anionic polyacrylamide or nonionic polyacrylamide.

10. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The molecular weight of the polyacrylamide is greater than or equal to 15 million.

11. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The inorganic salt auxiliary agent is one or both of calcium chloride and magnesium chloride.

12. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The inorganic salt auxiliary agent is aluminum sulfate.

13. The high-efficiency multifunctional mud conditioner according to claim 1, characterized in that: The amino coupling agent is a thioglycolic acid aminated organic coupling agent.

14. A method for preparing a high-efficiency multifunctional mud conditioner according to any one of claims 1 to 13, characterized in that: The preparation method comprises: Step S1: Weigh 10-15 parts of a long carbon chain zwitterionic surfactant, 60-70 parts of polyacrylamide, 14-25 parts of an inorganic salt additive, and 0.5-1.0 parts of an amino coupling agent for later use; Step S2: adding the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent in the above-mentioned weight proportions into a mixing device and stirring until the mixture is uniform to obtain a first mixture; and, Step S3: sequentially adding the polyacrylamide and the amino coupling agent in the above-mentioned weight proportions, mixing with the first mixture and stirring until the mixture is uniform, so as to prepare a high-efficiency multifunctional mud conditioner.

15. The method for preparing a high-efficiency multifunctional mud conditioner according to claim 14, characterized in that: The step S2 comprises: Step S21: adding the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent in the above-mentioned weight proportions into a mixing device for mixing; Step S22: stirring and mixing the long carbon chain zwitterionic surfactant and the inorganic salt auxiliary agent at room temperature and pressure for a stirring and mixing time of not less than 30 minutes to obtain a first mixture.

16. The method for preparing a high-efficiency multifunctional mud conditioner according to claim 14, characterized in that: The step S3 comprises: Step S31: adding the polyacrylamide and the amino coupling agent in the above weight proportions to a mixing device in sequence, and mixing them with the first mixture; Step S32: stirring and mixing the polyacrylamide, the amino coupling agent and the first mixture at room temperature and pressure for at least 30 minutes to obtain a high-efficiency multifunctional mud conditioner.

17. The method for preparing a high-efficiency multifunctional mud conditioner according to claim 14, characterized in that: The mixing device includes any one of a spiral mixer, a free-fall mixer, a forced stirring mixer and a stirring tank.

18. Use of the high-efficiency multifunctional mud conditioner according to any one of claims 1 to 13 in mud filtration and sewage flocculation and dewatering in ore washing and beneficiation.

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