CN115025724A - Inorganic antibacterial water purification functional ball with multi-element alloy core-shell structure and preparation method thereof - Google Patents
Inorganic antibacterial water purification functional ball with multi-element alloy core-shell structure and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of water treatment, and particularly relates to an inorganic antibacterial water purification functional ball with a multi-element alloy core-shell structure and a preparation method thereof. The inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises a ball body structure as follows: the inorganic antibacterial water purification functional ball comprises a mineral inner core and an antibacterial outer layer, and specifically comprises the following raw materials in parts by weight: 70-95 parts of mineral core adsorption material, 2-15 parts of inorganic antibacterial material and 1-10 parts of adhesive; wherein: the mineral core adsorption material is one or more of clay, quartz, silicon dioxide, diatomite, zeolite, attapulgite or medical stone powder; the inorganic antibacterial material is one or more of copper powder, zinc powder, KDF powder or silver powder. The invention has the characteristics of less adopted antibacterial materials, good antibacterial effect, lasting antibacterial effect and good water purification effect.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an inorganic antibacterial water purification functional ball with a multi-element alloy core-shell structure and a preparation method thereof.
Background
Chlorine is the most widely used disinfectant in water plants, and a certain amount of residual chlorine is maintained in water, so that the propagation of bacteria in the water can be inhibited. However, the direct use of water containing residual chlorine presents certain hazards:
1. has unpleasant pungent odor, and affects respiratory system;
2. residual chlorine reacts with organic matters in water to form carcinogens such as chloroform and the like;
3. the long-term drinking can cause chlorine to accumulate in the body to different degrees, and the health of the body is affected.
At present, the natural placing or illumination mode is generally adopted for removing residual chlorine in water in families, but the mode is long in time consumption, and the residual chlorine removing effect cannot be guaranteed. Some water purifying devices with residual chlorine removing functions are also available in the market, but the general devices are complex and high in cost, certain economic pressure is brought to consumers, and the residual chlorine removing effect is generally poor.
Chinese patent CN 107266055A discloses a formula of a light wave magnesium zinc energy purification daily ceramic ball and a manufacturing process thereof, wherein the ceramic ball is prepared from the following raw materials in parts by weight: 35-45 parts of quartz, 6-8 parts of medical stone, 5-10 parts of kaolin, 5-8 parts of cobalt sulfide, 8-12 parts of tourmaline, 5-10 parts of cobalt ferrite, 2-4 parts of titanium dioxide, 3-6 parts of muyu stone, 1-3 parts of spodumene, 1-3 parts of zinc oxide, 2-4 parts of diamond and 1-3 parts of carbon fiber. The ceramic ball prepared by the invention can continuously emit infrared rays with the wavelength of 20-35 mu m at normal temperature, has the effects of sterilizing, deodorizing, removing residual chlorine and activating water molecules, can destroy connecting bonds among the water molecules, reduces the number of the water molecules of the water molecule group, forms small molecular group water, further improves the water quality, has stronger penetrating power of the water molecules, promotes metabolism and enhances the cell activity.
However, in this patent, the mixture of the component having the antibacterial action and the component having the residual chlorine removing action is fired, so that a large amount of the antibacterial component needs to be added to the ceramic ball, and the antibacterial effect is largely impaired.
In addition, the tap water generally has high content of heavy metal elements, and is easy to cause harm to the body after being directly drunk. Trace elements are less and can not meet the requirements of human bodies.
How to prepare the ceramic ball with good antibacterial effect and good residual chlorine removing effect and trace element addition by using less antibacterial materials becomes a technical problem to be solved urgently in the industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an inorganic antibacterial water purification functional ball with a multi-element alloy core-shell structure, which has the characteristics of less adopted antibacterial materials, good antibacterial effect, lasting antibacterial property, good water purification effect and capability of increasing trace elements.
The inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises a ball body structure as follows: the inorganic antibacterial water purification functional ball comprises a mineral inner core and an antibacterial outer layer, and the raw materials required for preparing the inorganic antibacterial water purification functional ball are as follows in parts by weight:
70-95 parts of mineral core adsorbing material, 2-15 parts of inorganic antibacterial material and 1-10 parts of adhesive.
The particle size of the mineral inner core is as follows: 2-8mm, and in view of the cost of the balling process, the cost is increased due to the excessively large or small particle size, and because the contact sterilization is adopted, the contact area is reduced after the excessively large particle size, so that the sterilization rate is reduced.
The thickness of the antibacterial outer layer is as follows: 0.1-2 mm. From the cost consideration, too thick antibiotic outer layer can lead to the cost to promote, and antibiotic effect reinforcing is not obvious, and in addition, antibiotic outer layer is too thick can influence the water purification effect of mineral kernel. Too thin an antimicrobial outer layer may cause the antimicrobial outer layer to peel off. Through experimental tests, the appropriate thickness of the antibacterial outer layer can ensure the antibacterial efficiency and reduce the cost.
The mineral inner core adsorption material is one or more of clay, quartz, silicon dioxide, diatomite, zeolite, attapulgite or medical stone powder.
Preferably, the mineral core adsorbing material is prepared from the following raw materials in parts by weight:
35-40 parts of clay, 0-20 parts of quartz, 5-10 parts of silicon dioxide, 0-5 parts of diatomite, 0-10 parts of zeolite, 0-5 parts of attapulgite and 0-10 parts of medical stone powder.
More preferably, the mineral core adsorbing material is prepared from the following raw materials in parts by weight:
35-40 parts of clay, 5-20 parts of quartz, 5-10 parts of silicon dioxide, 1-5 parts of diatomite, 2-10 parts of zeolite, 1-5 parts of attapulgite and 3-10 parts of medical stone powder.
The clay is used for easier binding and molding in the process of balling and can improve the molding strength of the inner core, and common Suzhou soil, Laiwu clay, Neotame clay and the like are used, and Suzhou soil is preferred. Quartz, silicon dioxide, attapulgite and medical stone powder also play a role in bonding and reinforcing the inner core structure. The quartz mainly plays a role in improving the sintering temperature and enhancing the hardness of the ball. The diatomite is preferably food-grade diatomite, and the diatomite cannot secondarily release substances harmful to human bodies, so that the diatomite is an economical and environment-friendly water quality filtering material. The zeolite has a natural microporous structure, a very large specific surface area and a very good microporous adsorption effect. The medical stone powder mainly plays a role in adjusting the pH value of water and purifying water quality. The materials can be mutually fused in the sintering process, so that the hardness of the sphere can be improved, and the additional function of the sphere can be enhanced.
The inorganic antibacterial material is one or more of copper powder, zinc powder, KDF powder or silver powder.
Preferably, the inorganic antibacterial material is a mixture of copper powder and zinc powder, and the mass ratio of the copper powder to the zinc powder is (60-70) to (40-30).
Preferably, the inorganic antibacterial material is a mixture of copper powder, silver powder and zinc powder, and the mass ratio of the copper powder to the zinc powder is 60 (30-35) to 10-5.
Preferably, the inorganic antibacterial material is KDF powder and silver powder, and the mass ratio of the KDF powder to the silver powder is (90-95) to (10-5).
Copper powder and zinc powder are adopted, so that the cost can be greatly reduced under the condition of the same antibacterial effect; the copper powder and the zinc powder can form a copper-zinc micro-battery effect and have the functions of sterilization and dechlorination; the formula adopts various bactericidal metal materials, and can play a broad-spectrum killing and inhibiting role on flora.
The adhesive is polyvinyl alcohol solution with the concentration of 0.1-5 wt%.
The preparation method of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises the following steps:
(1) mixing the mineral core adsorbing material, grinding to the particle size of 200-2000 meshes, spreading and drying for 1-3 days after rolling with water, drying and sintering to obtain a mineral core;
(2) grinding the inorganic antibacterial material for 1-3 hours until the particle size of the powder is 100nm-10 mu m to obtain the inorganic antibacterial material;
(3) adding the mineral core into a ball rolling machine, spraying an adhesive on the mineral core, then scattering an inorganic antibacterial material, and continuously rolling the ball for 0.5-1 hour; spreading and drying the prepared spheres;
(4) polishing, cleaning floating ash, airing, screening, detecting and packaging to obtain the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure.
In the step (1), the sintering temperature is 800-1350 ℃, preferably 1000-1350 ℃; the sintering time is 1-5 hours.
In the step (4), the polishing is as follows: idling the prepared ball body in a ball rolling machine for 1-2 hours, wherein the rotating speed of the ball rolling machine is 30-120 r/min.
The use method of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises the following steps: generally, the method adopts two use modes, namely a soaking mode, wherein the ball water mass ratio is 1:90-110 (g/L), and preferably 1: 100; the second is a flow-through type, the ball water contact time is 1-3 seconds. The soaking type does not have specific soaking time, the soaking type is contact type sterilization, and the water treatment amount (service life) is as follows: 1g of functional balls treated 100L of water.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention sets the water purification function ball as a core-shell structure, and the ball structure comprises: a mineral inner core and an antibacterial outer layer. The particle sizes of the mineral core adsorption material and the inorganic antibacterial material are strictly controlled, the antibacterial material is coated on the outer surface of the mineral core by adopting a special process, the adsorption effect of the mineral core cannot be influenced, the using amount of the inorganic antibacterial material is greatly saved, and the inorganic antibacterial material has the characteristics of less adopted antibacterial material, good antibacterial effect, lasting antibacterial effect and good residual chlorine removal effect.
2. The diatomite and the zeolite are contained in the material, so that peculiar smell in water can be adsorbed, and heavy metal can be adsorbed; the material contains Maifanitum component, and can release trace elements and regulate pH value of water.
3. The preparation method of the invention is scientific, reasonable, simple and feasible, and is convenient for industrial production.
Detailed Description
The present invention will be further described with reference to specific examples so that those skilled in the art may better understand the present invention, but the present invention is not limited thereto.
The raw materials used in the examples were all commercially available except as specifically indicated.
The diatomaceous earth used in the examples was food grade diatomaceous earth.
Example 1
The inorganic antibacterial water purification function ball with the multi-element alloy core-shell structure comprises a ball body structure as follows: the mineral core and antibiotic outer layer, the diameter of mineral core is 5mm, and the thickness of antibiotic outer layer is 1 mm.
The raw materials for preparing the inorganic antibacterial water purification functional ball are as follows by weight: 82 parts of a mineral core adsorption material, 10 parts of an inorganic antibacterial material and 5 parts of an adhesive;
the mineral inner core adsorbing material is prepared from the following raw materials in parts by weight: 38 parts of Suzhou soil, 12 parts of quartz, 8 parts of silicon dioxide, 3 parts of diatomite, 6 parts of zeolite, 3 parts of attapulgite and 7 parts of medical stone powder.
The inorganic antibacterial material is a mixture of copper powder and zinc powder, and the mass ratio of the copper powder to the zinc powder is 65: 35.
The adhesive is polyvinyl alcohol solution with the concentration of 3 wt%.
The preparation method of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises the following specific steps:
(1) mixing the mineral core adsorbing materials, and grinding the mixture to a particle size of 1200 meshes; spreading and airing for 2 days after rolling the balls with water, drying, and sintering for 3 hours at 1080 ℃ to obtain mineral cores;
(2) grinding the inorganic antibacterial material for 1 hour until the particle size of the powder is less than 1000nm to obtain the inorganic antibacterial material;
(3) adding a mineral core into a ball rolling machine, spraying an adhesive on the mineral core, then uniformly spraying an inorganic antibacterial material, continuously rolling the ball for 0.8 hour until the surface of the mineral core is uniformly coated with a 1mm antibacterial outer layer;
(4) idling the prepared ball body in a ball rolling machine for 1.5 hours at the rotating speed of 80 revolutions per minute, spreading and drying the prepared ball body; and (4) cleaning floating ash, airing, screening, detecting and packaging to obtain the inorganic antibacterial water purification functional ball with the multi-alloy core-shell structure.
Example 2
The inorganic antibacterial water purification function ball with the multi-element alloy core-shell structure comprises a ball body structure as follows: the mineral core and antibiotic outer layer, the diameter of mineral core is 2mm, and the thickness of antibiotic outer layer is 0.1 mm.
The raw materials for preparing the inorganic antibacterial water purification functional ball are as follows by weight: 70 parts of mineral core adsorbing material, 2 parts of inorganic antibacterial material and 1 part of adhesive.
The mineral inner core adsorbing material is prepared from the following raw materials in parts by weight: 35 parts of Suzhou soil, 5 parts of quartz, 5 parts of silicon dioxide, 1 part of diatomite, 2 parts of zeolite, 1 part of attapulgite and 3 parts of medical stone powder.
The inorganic antibacterial material is a mixture of copper powder, silver powder and zinc powder, and the mass ratio of the copper powder to the silver powder to the zinc powder is 60:32: 8.
The adhesive is polyvinyl alcohol solution with the concentration of 0.1 wt%.
The preparation method of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises the following specific steps:
(1) mixing the mineral core adsorbing materials, and grinding the mixture to the particle size of 2000 meshes; rolling with water, spreading and air-drying for 1 day, drying, and sintering at 800 deg.C for 5 hr to obtain mineral core;
(2) grinding the inorganic antibacterial material for 2 hours until the particle size of the powder is less than 5 mu m to prepare the inorganic antibacterial material;
(3) adding the mineral core into a ball rolling machine, and spraying an adhesive on the mineral core; then uniformly spreading inorganic antibacterial material, continuously rolling the ball for 0.5 hour until the surface of the mineral core is uniformly coated with an antibacterial outer layer with the thickness of 0.1 mm;
(4) idling the prepared ball body in a ball rolling machine for 2 hours at the rotating speed of 30 revolutions per minute, spreading and drying the prepared ball body; and (4) cleaning floating ash, airing, screening, detecting and packaging to obtain the inorganic antibacterial water purification functional ball with the multi-alloy core-shell structure.
Example 3
The inorganic antibacterial water purification function ball with the multi-element alloy core-shell structure comprises a ball body structure as follows: the mineral core and antibiotic outer layer, the diameter of mineral core is 8mm, and the thickness of antibiotic outer layer is 2 mm.
The raw materials for preparing the inorganic antibacterial water purification functional ball are as follows by weight: 95 parts of a mineral core adsorbing material, 15 parts of an inorganic antibacterial material and 10 parts of an adhesive.
The mineral inner core adsorbing material is prepared from the following raw materials in parts by weight: 40 parts of Suzhou soil, 20 parts of quartz, 10 parts of silicon dioxide, 5 parts of diatomite, 10 parts of zeolite, 5 parts of attapulgite and 10 parts of medical stone powder.
The inorganic antibacterial material comprises KDF powder and silver powder, and the mass ratio of the KDF powder to the silver powder is 92: 8.
The adhesive is polyvinyl alcohol solution with the concentration of 5 wt%.
The preparation method of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure comprises the following specific steps:
(1) mixing the mineral core adsorbing materials, and grinding the mixture to the particle size of 200 meshes; spreading and drying with water, drying for 3 days, and sintering at 1350 deg.C for 1 hr to obtain mineral core;
(2) grinding the inorganic antibacterial material for 3 hours until the particle size of the powder is less than 1 mu m to prepare the inorganic antibacterial material;
(3) adding the mineral core into a ball rolling machine, and spraying an adhesive on the mineral core; then uniformly spreading inorganic antibacterial materials, continuing rolling the ball for 1 hour until the surface of the mineral core is uniformly coated with a 2mm antibacterial outer layer;
(4) idling the prepared ball body in a ball rolling machine for 1 hour, wherein the rotating speed of the ball rolling machine is 120 revolutions per minute, spreading and drying the prepared ball body; and (4) cleaning floating ash, airing, screening, detecting and packaging to obtain the inorganic antibacterial water purification functional ball with the multi-alloy core-shell structure.
Comparative example 1
The raw materials of the water purification functional ball are the same as the mineral core adsorbing material in the embodiment 1, and the preparation method is the same as the step (1) in the embodiment 1.
Comparative example 2
The raw materials of the water purification functional ball are the same as the mineral core adsorbing material in the embodiment 2, and the preparation method is the same as the step (1) in the embodiment 2.
Comparative example 3
The raw materials of the water purification functional ball are the same as the mineral core adsorbing material in the embodiment 3, and the preparation method is the same as the step (1) in the embodiment 3.
Comparative example 4
The raw materials of the inorganic antibacterial water purification functional ball are the same as those of the example 1.
The preparation method comprises the following steps:
mixing a mineral core adsorption material (a core is not formed, but the name of the mineral core adsorption material is not modified for the convenience of discrimination) and an inorganic antibacterial material, and grinding the mixture to the particle size of 1200 meshes; rolling the ball with water and adhesive, spreading and drying for 2 days, drying, and sintering at 1080 ℃ for 1 hour to obtain the inorganic antibacterial water purification functional ball.
Comparative example 5
The raw materials of the inorganic antibacterial water purification functional ball are the same as those in the embodiment 1.
The difference lies in that: the inorganic antibacterial water purification functional ball comprises the following raw materials in parts by weight: 82 parts of a mineral core adsorption material, 30 parts of an inorganic antibacterial material and 15 parts of a binding agent.
The preparation method is the same as that of comparative example 4.
However, the melting point of zinc powder was 420 ℃ and that of copper powder was 1083 ℃, and comparative example 4 and comparative example 5 should in principle be blended at a firing temperature not exceeding 420 ℃, but the fired pellets at this temperature were not vitrified and had insufficient strength. Is easy to break in the using process. If the roasting temperature exceeds the melting temperature of the zinc powder, the zinc powder is converted from a solid phase to a liquid phase to block the nano-pore channels, so that the antibacterial effect is greatly reduced.
If copper powder (melting point 1083 ℃) and silver powder (melting point 961 ℃) are used, the mass ratio of the copper powder to the silver powder is 65: 35. The roasting temperature can adopt 950 ℃, but 30 parts of inorganic antibacterial material is needed to reach the antibacterial level of the invention, and the cost is doubled.
Comparative example 6
The raw materials of the inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure are the same as those of the inorganic antibacterial water purification functional ball in the embodiment 1.
The preparation method was the same as example 1 except that the polishing step was not performed.
The functional balls prepared in the above examples and comparative examples were subjected to a performance test.
1. And (3) testing the dechlorination effect:
the test method comprises the following steps: the functional balls are put into a filter element and respectively placed in a tap water (the initial chlorine content is 0.4 mg/L) prefilter, the dosage of the functional balls is 300g, after 5 minutes of water passing, the chlorine content is tested, and the test method adopts the following steps: the test results of N, N-diethyl-p-phenylenediamine (DPD) spectrophotometry are shown in Table 1.
TABLE 1 dechlorination Effect test results
2. And (3) testing the antibacterial effect:
the test method comprises the following steps: respectively adding the functional balls into a sterilization box of a water tank of a humidifier (2L), wherein the mass ratio of the functional balls to water is 1:100 (g: L), and after soaking for 24 hours, testing the antibacterial effect, wherein the testing method comprises the following steps: GB/T21510-.
And (3) detecting the long-acting antibacterial performance:
the test method comprises the following steps: respectively adding the functional balls into a sterilization box of a humidifier (2L) water tank, wherein the mass ratio of the functional balls to water is 1:100 (g: L), and respectively testing the antibacterial effect of 500mL, 1000mL, 1500mL and 2000mL of treated water, wherein the test method comprises the following steps: GB/T21510-
TABLE 2 test results of antibacterial Effect
TABLE 3 antibacterial Effect test results
3. And (3) testing the effect of adsorbing the chromium (hexavalent) heavy metal:
the initial content of heavy metal chromium (hexavalent) in the water is 0.04 mg/L.
The test method comprises the following steps: the functional balls are respectively added into a sterilization box of a water tank of a humidifier (2L), the mass ratio of the functional balls to water is 1:100 (g: L), after the functional balls and water are soaked for 24 hours, the effect of adsorbing heavy metals is tested, the test method adopts a GB/T5750.6-2006 drinking water standard detection method for metal indexes, and the test results are shown in Table 4.
Table 4 test results of effect of adsorbing heavy metal chromium (hexavalent)
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Content (mg/L) of heavy metal chromium (hexavalent) | ＜0.004 | ＜0.004 | ＜0.004 | ＜0.004 | 0.005 | 0.006 | 0.005 | 0.005 | ＜0.004 |
4. Trace element selenium test
The initial content of selenium trace element in water is 0.001 mg/L.
The test method comprises the following steps: and respectively adding the functional balls into a water tank sterilization box of a humidifier (2L), wherein the mass ratio of the functional balls to water is 1:100 (g: L), soaking for 24 hours, and then testing the trace element selenium by adopting a testing method GB/T5750.6-20061.5, wherein the testing results are shown in Table 5.
TABLE 5 test results for the trace element selenium
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| The content of trace element selenium is mg/L | 0.005 | 0.003 | 0.004 | 0.003 | 0.004 | 0.003 | 0.004 | 0.003 | 0.003 |
The tests show that the inorganic antibacterial water purification functional ball is designed into a core-shell structure, the dechlorination effect of the inorganic antibacterial water purification functional ball is not influenced, a very good antibacterial effect can be obtained on the premise of adopting a small amount of inorganic antibacterial materials, the inorganic antibacterial materials are saved, and the preparation cost of the functional ball is reduced.
Claims (10)
1. An inorganic antibiotic water purification function ball of many first alloy nucleocapsid structure which characterized in that: the sphere structure is composed of: the inorganic antibacterial water purification functional ball comprises a mineral inner core and an antibacterial outer layer, and the raw materials required for preparing the inorganic antibacterial water purification functional ball are as follows in parts by weight: 70-95 parts of mineral core adsorption material, 2-15 parts of inorganic antibacterial material and 1-10 parts of adhesive;
wherein:
the mineral core adsorption material is one or more of clay, quartz, silicon dioxide, diatomite, zeolite, attapulgite or medical stone powder;
the inorganic antibacterial material is one or more of copper powder, zinc powder, KDF powder or silver powder;
the particle size of the mineral inner core is as follows: 2-8 mm;
the thickness of the antibacterial outer layer is as follows: 0.1-2 mm.
2. The inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure according to claim 1, characterized in that: the mineral core adsorbing material is prepared from the following raw materials in parts by weight:
35-40 parts of clay, 0-20 parts of quartz, 5-10 parts of silicon dioxide, 0-5 parts of diatomite, 0-10 parts of zeolite, 0-5 parts of attapulgite and 0-10 parts of medical stone powder.
3. The inorganic antibacterial water purification functional sphere with the multi-element alloy core-shell structure according to claim 2, characterized in that: the mineral inner core adsorbing material is prepared from the following raw materials in parts by weight:
35-40 parts of clay, 5-20 parts of quartz, 5-10 parts of silicon dioxide, 1-5 parts of diatomite, 2-10 parts of zeolite, 1-5 parts of attapulgite and 3-10 parts of medical stone powder.
4. The inorganic antibacterial water purification functional sphere with the multi-element alloy core-shell structure according to claim 1, characterized in that: the inorganic antibacterial material is a mixture of copper powder and zinc powder, and the mass ratio of the copper powder to the zinc powder is (60-70) to (40-30).
5. The inorganic antibacterial water purification functional sphere with the multi-element alloy core-shell structure according to claim 1, characterized in that: the inorganic antibacterial material is a mixture of copper powder, silver powder and zinc powder, and the mass ratio of the copper powder to the silver powder to the zinc powder is 60 (30-35) to 10-5.
6. The inorganic antibacterial water purification functional ball with the multi-element alloy core-shell structure according to claim 1, characterized in that: the inorganic antibacterial material comprises KDF powder and silver powder, and the mass ratio of the KDF powder to the silver powder is (90-95) to (10-5).
7. The inorganic antibacterial water purification functional sphere with the multi-element alloy core-shell structure according to claim 1, characterized in that: the adhesive is polyvinyl alcohol solution with the concentration of 0.1-5 wt%.
8. A preparation method of the inorganic antibacterial water purification functional sphere with the multi-element alloy core-shell structure as recited in any one of claims 1 to 7, which is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing the mineral core adsorbing materials, grinding the particle size to 200-2000 meshes, balling by a ball forming machine, spreading and drying for 1-3 days, drying and sintering to obtain a mineral core;
(2) grinding the inorganic antibacterial material for 1-3 hours until the particle size of the powder is 100nm-10 mu m to obtain the inorganic antibacterial material;
(3) adding the mineral core into a ball rolling machine, spraying an adhesive on the mineral core, then scattering an inorganic antibacterial material, and continuously rolling the ball for 0.5-1 hour; spreading and drying the prepared spheres;
(4) polishing, cleaning floating ash, airing, screening, detecting and packaging to obtain the inorganic antibacterial water purification functional ball with the multi-alloy core-shell structure.
9. The method of claim 8, wherein: in the step (1), the sintering temperature is 800-1350 ℃, and the sintering time is 1-5 hours.
10. The method for producing according to claim 8, characterized in that: in the step (4), the polishing is as follows: idling the prepared ball body in a ball rolling machine for 1-2 hours, wherein the rotating speed of the ball rolling machine is 30-120 r/min.
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