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

Abstract

The invention relates to an integrated mine water fluorine turbidity removal agent and a preparation method thereof. The medicament is prepared by grinding, mixing and granulating a flocculating agent, activated aluminum oxide and a binder, the binder accounts for 1-5% of the total weight of the medicament, and the flocculating agent is PAC. The mine water fluorine turbidity integrated removal agent integrates the functions of the flocculant, the fluorine removal agent, the coagulant aid and the dense medium, can realize the integrated removal of the mine water fluorine turbidity, and correspondingly simplifies the water treatment process flow.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to an integrated agent for removing fluorine turbidity from mine water and a preparation method thereof. Background Art

[0002] Due to the special geological conditions, mine water generally contains more suspended matter and fluorine. The traditional water treatment method is generally to add a large amount of PAC, PAM and defluoridation agent to the water. Although the water is purified, it causes huge cost investment, and the treatment process is long and difficult to control. In addition, since the added reagents are generally in powder form, workers will inevitably generate a lot of dust when adding materials, which seriously affects the physical and mental health of workers and the working environment.

[0003] CN116969564A discloses a flocculant and a method for removing suspended matter from mine water. The scheme includes first heating starch to gelatinize, then mixing it with acrylamide, an initiator, and a crosslinking agent to react to obtain a starch-acrylamide graft copolymer; then mixing it with polyaluminum ferric chloride, polyphosphorus ferric chloride, and an auxiliary agent to obtain a flocculant. The removal method includes reacting the flocculant with the upper layer liquid separated by a cyclone separator, and then post-processing to achieve the removal of suspended matter from mine water.

[0004] However, the above-mentioned prior art still has the following disadvantages: 1) The mine water treatment process is long, with many equipments, complicated processes, large investment and large floor space; 2) The consumption of reagents is large and the operating cost is high; 3) It is difficult to effectively remove fluorine at the same time, and the application range of the reagents is narrow; 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 of the industry. Summary of the invention

[0006] In view of the above-mentioned deficiencies of the prior art, the present invention provides an integrated agent for removing fluorine turbidity from mine water and a preparation method thereof. The integrated agent for removing fluorine turbidity from mine water integrates the functions of four agents, namely, flocculant, defluorinator, coagulant aid and heavy medium, and can achieve integrated removal of fluorine turbidity from mine water, and correspondingly simplifies the water treatment process.

[0007] Therefore, the first aspect of the present invention provides an integrated agent for removing fluorine turbidity from mine water, which is prepared by grinding, mixing and granulating a flocculant, activated alumina and a binder, wherein the binder accounts for 1-5% of the total weight of the agent, and the flocculant is PAC (polyaluminium chloride).

[0008] Furthermore, the weight ratio of the flocculant to the activated alumina is 2:8-8:2, preferably 3:7-7:3. The content ratio of the two can be adjusted in a wide range according to the actual situation of the mine water and the treatment requirements for suspended matter and fluorine.

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

[0010] The integrated fluorine turbidity removal agent for mine water of the technical solution 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 / cm 3 Spherical particles. Activated alumina, also known as activated bauxite, has a chemical formula of Al 2 O 3 It is a porous, highly dispersed solid material with a large specific surface area. It can be used as an adsorbent, water purifier, catalyst and catalyst carrier, and can be used as a defluoridation agent for high-fluoride water.

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

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

[0014] The second aspect of the present invention provides a method for preparing the above-mentioned integrated mine water fluorine turbidity removal agent, the method comprising the following steps:

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

[0016] (2) spraying a liquid binder into the premix, and stirring and mixing the mixture thoroughly to obtain a granulated mixture;

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

[0018] (4) The obtained granules were dried in an oven at 150° C. for 1-1.5 hours and then naturally cooled to room temperature.

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

[0020] Furthermore, the method further comprises:

[0021] (5) The cooled particles are transferred to an oscillating screen for oscillation screening to remove dust attached to the surface of the particles.

[0022] The present invention combines the flocculant and coagulant functions of PAC and PAM and the defluorination function of activated alumina, and can realize the integrated removal of fluorine turbidity in mine water. The prepared agent is a microparticle agent with a particle size of about 150 μm. At the same time, activated alumina has a large specific gravity, which can make the microparticle agent produce a heavy medium effect similar to microsand when used, so that the suspended matter aggregates with the agent particles under the action of the flocculant into large particles, and can settle quickly, thereby improving the water treatment efficiency. In addition, since the agent particles have a large mechanical strength, workers will not generate dust when adding the agent.

[0023] The beneficial effects of the present invention include:

[0024] 1. It integrates the functions of four agents, namely, flocculant, defluorinator, coagulant aid and heavy medium, to achieve integrated removal of fluorine turbidity and simplify the water treatment process;

[0025] 2. The equipment is relatively small and centrally arranged, requiring less investment and floor space;

[0026] 3. Small consumption of chemicals and low operating costs;

[0027] 4. Improve the mechanical strength of the agent and avoid the generation of dust when adding the agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic flow chart of a method for preparing an integrated agent for removing fluorine turbidity from mine water according to one embodiment of the present invention. DETAILED DESCRIPTION

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

[0030] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0031] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0032] Example 1

[0033] like Figure 1 As shown, a schematic flow chart of a method for preparing an integrated agent for removing fluorine turbidity from mine water according to one embodiment of the present invention is shown, and the method comprises the following steps:

[0034] (1) grinding the flocculant (PAC) and activated alumina to a particle size of 500 mesh respectively, and then mixing them uniformly to obtain a premix;

[0035] (2) Spraying the liquid binder into the premix and stirring and mixing the mixture to obtain a granulated mixture; for some resin binders, the liquid state is obtained by heating;

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

[0037] (4) drying the obtained particles in an oven at 150° C. for 1 hour and then cooling them naturally to room temperature; and optionally

[0038] (5) The cooled particles are transferred to an oscillating screen for oscillation and sieving to remove dust attached to the surface of the particles to obtain a finished product.

[0039] Example 2

[0040] According to the method of Example 1, a mine water fluorine turbidity integrated removal agent product was prepared, wherein the agent consisted of a flocculant (PAC), activated alumina (spherical particles with a particle size of 3 mm and a bulk density of 0.78 g / cm 3 ) and a binder polyvinyl alcohol resin, wherein the binder accounts for 3% of the total weight of the agent, the weight ratio of the flocculant to the activated alumina is 5:5, and the granulation particle size of the agent is 100μm.

[0041] Example 3

[0042] According to the method of Example 1, a mine water fluorine turbidity integrated removal agent product was prepared, wherein the agent consisted of a flocculant (PAC), activated alumina (spherical particles with a particle size of 1 mm and a bulk density of 0.85 g / cm 3 ) and a binder polyvinyl alcohol resin, wherein the binder accounts for 2% of the total weight of the agent, the weight ratio of the flocculant to the activated alumina is 8:2, and the granulation particle size of the agent is 125μm.

[0043] Example 4

[0044] According to the method of Example 1, a mine water fluorine turbidity integrated removal agent product was prepared, wherein the agent consisted of a flocculant (PAC), activated alumina (spherical particles with a particle size of 2 mm and a bulk density of 0.82 g / cm 3 ) and a binder chloroacetic acid resin, wherein the binder accounts for 1% of the total weight of the agent, the weight ratio of the flocculant to the activated alumina is 3:7, and the granulation particle size of the agent is 150μm.

[0045] Example 5

[0046] According to the method of Example 1, a mine water fluorine turbidity integrated removal agent product was prepared, wherein the agent consisted of a flocculant (PAC), activated alumina (spherical particles with a particle size of 3 mm and a bulk density of 0.78 g / cm 3 ) 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 granulation particle size of the agent is 200μm.

[0047] Example 6

[0048] According to the method of Example 1, a mine water fluorine turbidity integrated removal agent product was prepared, wherein the agent consisted of a flocculant (PAC), activated alumina (spherical particles with a particle size of 2 mm and a bulk density of 0.82 g / cm 3 ) 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 granulation particle size of the agent is 175μm.

[0049] The integrated fluorine turbidity removal agent for mine water obtained in Examples 2-6 was actually used for purification of mine water in multiple locations, and the expected effects were achieved.

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

[0051] (1) In conventional technology, fluoride in mine water is generally removed by adding a defluoridating agent, and suspended solids are generally removed by adding a flocculant, a coagulant aid, or even an additional heavy medium, which makes the water treatment process long and complicated. The agent of the present invention can couple and integrate the functions of the above agents to achieve the integrated removal of fluoride and suspended solids.

[0052] (2) Since the traditional water treatment process is long, more treatment equipment is required, the floor space is large, and the investment cost is high. The agent of the present invention can simplify the treatment process, use less equipment, occupy less floor space, and have lower investment cost.

[0053] (3) Traditional water treatment processes require many types of reagents, large amounts of reagents, and high operating costs. However, the reagents of the present invention have multiple functions, small amounts of reagents, and 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 the present invention is in the form of microparticles and has high mechanical strength. It does not generate dust when added, and can produce a rapid sedimentation effect similar to that of heavy media.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An integrated agent for removing fluorine turbidity from mine water, characterized in that: The agent is prepared by grinding, mixing and granulating a flocculant, active alumina and a binder, wherein the binder accounts for 1-5% of the total weight of the agent, and the flocculant is PAC.

2. The integrated agent for removing fluorine turbidity from mine water according to claim 1, characterized in that: The weight ratio of the flocculant to the activated alumina is 2:8-8:

2.

3. The integrated agent for removing fluorine turbidity from mine water according to claim 1, characterized in that: The weight ratio of the flocculant to the activated alumina is 5:

5.

4. The integrated agent for removing fluorine turbidity from mine water according to claim 1, characterized in that: The activated alumina has a particle size of 1-3 mm and a bulk density of 0.78-0.85 g / cm 3 of spherical particles.

5. The integrated agent for removing fluorine turbidity from mine water according to claim 1, characterized in that: The adhesive is resin glue or water glass, and the resin glue includes rosin, shellac, chloroacetic acid resin, or polyvinyl alcohol resin.

6. The integrated agent for removing fluorine turbidity from mine water according to claim 1, characterized in that: The granulation particle size of the medicine is 100-200 μm.

7. The method for preparing an integrated agent for removing fluorine turbidity from mine water according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: (1) grinding the flocculant and activated alumina to a particle size of 300-500 mesh respectively, and then mixing them evenly to obtain a premix; (2) spraying a liquid binder into the premix, and stirring and mixing the mixture thoroughly to obtain a granulated mixture; (3) granulating the granulation mixture in a granulator at a low speed; (4) The obtained granules were dried in an oven at 150° C. for 1-1.5 hours and then naturally cooled to room temperature.

8. The preparation method according to claim 7, characterized in that: The method further comprises: (5) The cooled particles are transferred to an oscillating screen for oscillation screening to remove dust attached to the surface of the particles.

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