Mine water fluorine and turbidity integrated removal agent and preparation method thereof

Abstract

The present application relates to a kind of mine water fluorine turbidity integrated removal reagent and preparation method thereof.The reagent is prepared by grinding, mixing, granulating of flocculant, active alumina and binder, wherein the binder accounts for 1-5% of the total weight of reagent, and the flocculant is PAC.The mine water fluorine turbidity integrated removal reagent simultaneously collects the functions of flocculant, fluoride removal agent, coagulant aid, heavy medium four kinds of reagents in one, can realize the integrated removal of mine water fluorine turbidity, and correspondingly simplifies water treatment process.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to an integrated fluoride and turbidity removal agent for mine water and its preparation method. Background Technology

[0002] Due to the unique geological conditions, mine water typically contains high levels of suspended solids and fluoride. Traditional water treatment methods generally involve adding large amounts of PAC, PAM, and defluorinating agents. While this purifies the water, it incurs significant costs, and the treatment process is lengthy and difficult to control. Furthermore, since the added agents are usually in powder form, workers inevitably generate large amounts of dust during the process, severely impacting their physical and mental health and the working environment.

[0003] CN116969564A discloses a flocculant and a method for removing suspended solids from mine water. The method includes first heating and gelatinizing starch, then mixing it with acrylamide, an initiator, and a crosslinking agent to react and obtain a starch-acrylamide graft copolymer; then mixing it with polyaluminum ferric chloride, polyphosphoric ferric chloride, and additives to obtain a flocculant. The removal method involves reacting the flocculant with the supernatant obtained from a hydrocyclone separator, followed by post-treatment to achieve the removal of suspended solids from the mine water.

[0004] However, the existing technologies mentioned above still have the following disadvantages: 1) The mine water treatment process is long, involves many pieces of equipment, is complex, and requires a large investment and land area; 2) The consumption of reagents is large, and the operating cost is high; 3) It is difficult to remove fluoride elements effectively at the same time, and the reagents have a narrow range of applications; 4) Dust is generated when the reagents are added, which is harmful to workers and the environment.

[0005] Therefore, the development of new mine water treatment agents has become an urgent need for the industry. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides an integrated fluoride and turbidity removal agent for mine water and its preparation method. This integrated fluoride and turbidity removal agent combines the functions of four agents—flocculator, defluorinator, coagulant aid, and heavy medium—into one, enabling integrated removal of fluoride and turbidity from mine water and correspondingly simplifying the water treatment process.

[0007] Therefore, the first aspect of the present invention provides an integrated fluoride and turbidity removal agent for mine water, the agent being prepared by grinding, mixing and granulation of flocculant, activated alumina and binder, wherein the binder accounts for 1-5% of the total weight of the agent and the flocculant is PAC (polyaluminum chloride).

[0008] Furthermore, the weight ratio of the flocculant to activated alumina is 2:8 to 8:2, preferably 3:7 to 7:3. The ratio of the two components can be adjusted within a wide range according to the actual conditions of the mine water and the requirements for treating suspended solids and fluorine.

[0009] In one embodiment, the flocculant to activated alumina has a weight ratio of 5:5.

[0010] The mine water fluoride and turbidity removal agent of the present invention can replace the use of PAM (polyacrylamide) in the prior art.

[0011] Furthermore, the activated alumina has a particle size of 1-3 mm and a bulk density of 0.78-0.85 g / cm³. 3 Spherical particles. Activated alumina, also known as activated bauxite, with the chemical formula Al2O3, is a porous, highly dispersible solid material with a large specific surface area. It can be used as an adsorbent, water purification agent, catalyst, and catalyst carrier, and can also be used as a defluorinating agent for high-fluoride water.

[0012] Furthermore, the binder is a resin adhesive or water glass. The binder binds the ground raw material powder together to form particles with the raw material powder as the matrix. The resin adhesive includes natural or synthetic resins, such as rosin, shellac; or vinyl chloride resin, polyvinyl alcohol resin, etc., preferably polyvinyl alcohol resin.

[0013] Furthermore, the granulation particle size of the agent is 100-200 μm, preferably 150 μm.

[0014] A second aspect of this invention provides a method for preparing the above-mentioned integrated fluoride and turbidity removal agent for mine water, the method comprising the following steps:

[0015] (1) Grind the flocculant and activated alumina to a particle size of 300-500 mesh respectively, and then mix them evenly to obtain a premix;

[0016] (2) The liquid binder is sprayed into the premix and thoroughly stirred to obtain a granulated mixture;

[0017] (3) Granulate the granulation mixture at low speed in a granulator;

[0018] (4) Dry the obtained particles in an oven at 150°C for 1-1.5 hours, and then let them cool naturally to room temperature.

[0019] Furthermore, in step (3), the granulation particle size is 100-200μm, preferably 150μm.

[0020] Furthermore, the method also includes:

[0021] (5) Transfer the cooled particles to a vibrating screen for sieving to remove dust adhering to the surface of the particles.

[0022] This invention integrates the flocculant and coagulant properties of PAC and PAM with the defluorination function of activated alumina, enabling integrated removal of fluoride and turbidity from mine water. The prepared reagent is a particulate reagent with a particle size of approximately 150 μm. Simultaneously, the high specific gravity of activated alumina allows this particulate reagent to act as a heavy medium, similar to micro-sand, during application. This causes suspended solids to aggregate with the reagent particles into larger particles under the action of the flocculant, resulting in rapid sedimentation and improved water treatment efficiency. Furthermore, due to the high mechanical strength of the reagent particles, no dust generation occurs during reagent addition.

[0023] The beneficial effects of this invention include:

[0024] 1. It integrates the functions of four agents—flocculator, defluoridator, coagulant aid, and heavy medium—to achieve integrated removal of fluoride and turbidity, simplifying the water treatment process.

[0025] 2. Fewer pieces of equipment are required and centrally located, resulting in smaller investment and floor space requirements;

[0026] 3. Low reagent consumption and low operating costs;

[0027] 4. Improve the mechanical strength of the agent to avoid dust generation during agent addition. Attached Figure Description

[0028] Figure 1 This is a schematic flowchart of the preparation method of the integrated fluoride and turbidity removal agent for mine water according to one embodiment of the present invention. Detailed Implementation

[0029] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0030] While exemplary embodiments of the invention are shown in the accompanying drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention can be understood more clearly and thoroughly, and that the scope of the invention can be fully conveyed to those skilled in the art.

[0031] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] Example 1

[0033] like Figure 1 The diagram shows a flow chart of a method for preparing an integrated fluoride and turbidity removal agent for mine water according to one embodiment of the present invention. The method includes the following steps:

[0034] (1) Grind the flocculant (PAC) and activated alumina to a particle size of 500 mesh, then mix them evenly to obtain a premix;

[0035] (2) The liquid binder is sprayed into the premix and thoroughly stirred to obtain a granulated mixture; for some resin binders, the liquid state is obtained by heating.

[0036] (3) The granulation mixture is granulated at low speed in a granulator, and the granulation particle size is 100-200μm;

[0037] (4) The obtained particles were dried in an oven at 150°C for 1 hour, and then allowed to cool naturally to room temperature; and optionally...

[0038] (5) Transfer the cooled particles to a vibrating screen for sieving to remove dust adhering to the surface of the particles and obtain the finished product.

[0039] Example 2

[0040] A mine water fluoride and turbidity removal agent product was prepared according to the method in Example 1. The agent consists of a flocculant (PAC) and activated alumina (3mm spherical particles with a bulk density of 0.78g / cm³). 3 It is prepared by flocculant and binder polyvinyl alcohol resin, wherein the binder accounts for 3% of the total weight of the agent, the weight ratio of flocculant to activated alumina is 5:5, and the particle size of the agent is 100μm.

[0041] Example 3

[0042] A mine water fluoride and turbidity removal agent product was prepared according to the method in Example 1. The agent consists of a flocculant (PAC) and activated alumina (1 mm spherical particles, bulk density 0.85 g / cm³). 3 It is prepared by flocculant and binder polyvinyl alcohol resin, wherein the binder accounts for 2% of the total weight of the agent, the weight ratio of flocculant to activated alumina is 8:2, and the particle size of the agent is 125μm.

[0043] Example 4

[0044] A mine water fluoride and turbidity removal agent product was prepared according to the method in Example 1. The agent consists of flocculant (PAC) and activated alumina (2mm spherical particles, bulk density 0.82g / cm³). 3 It is prepared by flocculant and binder chloroacetic acid resin, wherein the binder accounts for 1% of the total weight of the agent, the weight ratio of flocculant to activated alumina is 3:7, and the particle size of the agent is 150μm.

[0045] Example 5

[0046] A mine water fluoride and turbidity removal agent product was prepared according to the method in Example 1. The agent consists of a flocculant (PAC) and activated alumina (3mm spherical particles with a bulk density of 0.78g / cm³). 3 It is prepared by combining flocculant and binder shellac, wherein the binder accounts for 3% of the total weight of the agent, the weight ratio of flocculant to activated alumina is 7:3, and the particle size of the agent is 200μm.

[0047] Example 6

[0048] A mine water fluoride and turbidity removal agent product was prepared according to the method in Example 1. The agent consists of flocculant (PAC) and activated alumina (2mm spherical particles, bulk density 0.82g / cm³). 3 It is prepared by combining flocculant and binder shellac, wherein the binder accounts for 5% of the total weight of the agent, the weight ratio of flocculant to activated alumina is 5:5, and the particle size of the agent is 175μm.

[0049] The integrated fluoride and turbidity removal agents for mine water obtained in Examples 2-6 were actually used for the purification treatment of mine water in multiple locations, and the expected results were achieved.

[0050] In summary, the technical solution of the present invention has the following advantages:

[0051] (1) In traditional technologies, fluoride in mine water is usually removed by adding defluorinating agents, and suspended solids are usually removed by adding flocculants, coagulants, or even additional heavy media. This makes the water treatment process long and complex. The reagent of this invention can couple and integrate the functions of the above reagents, and can achieve integrated removal of fluoride and suspended solids.

[0052] (2) Traditional water treatment processes are lengthy, requiring a large amount of equipment, a large floor space, and high investment costs. The reagent of this invention simplifies the treatment process, requires fewer equipment, occupies less floor space, and has lower investment costs.

[0053] (3) Traditional water treatment processes require a variety of chemicals, large quantities, and high operating costs. In contrast, the chemicals of this invention have multiple functions, require less dosage, and have low operating costs.

[0054] (4) Traditional agents are mostly in powder form, which easily generates dust when added, which is very unfriendly to the health of workers and the working environment. The agent of this invention is in the form of microparticles and has high mechanical strength. It does not generate dust when added and can produce a rapid settling effect similar to heavy media.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A chemical agent for the integrated removal of fluoride and turbidity from mine water, characterized in that, The agent is prepared by grinding, mixing and granulating flocculant, activated alumina and binder, wherein the binder accounts for 1-5% of the total weight of the agent and the flocculant is PAC; The weight ratio of the flocculant to activated alumina is 5:5-7:3; The activated alumina has a particle size of 1-3 mm and a bulk density of 0.78-0.85 g / cm³. 3 spherical particles; The granulation particle size of the agent is 100-200 μm; The adhesive is a resin glue or water glass, and the resin glue includes rosin, shellac, vinyl acetate resin, or polyvinyl alcohol resin; The integrated fluoride and turbidity removal agent for mine water is prepared using the following method, which includes the following steps: (1) Grind the flocculant and activated alumina to a particle size of 300-500 mesh respectively, and then mix them evenly to obtain a premix; (2) The liquid binder is sprayed into the premix and thoroughly stirred to obtain a granulated mixture; (3) Granulate the granulation mixture at low speed in a granulator; (4) Dry the obtained particles in an oven at 150°C for 1-1.5 hours, and then let them cool naturally to room temperature.

2. The integrated fluoride and turbidity removal agent for mine water according to claim 1, characterized in that, The method further includes: (5) Transfer the cooled particles to a vibrating screen for sieving to remove dust adhering to the surface of the particles.

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