Composite mineralized material, preparation method and application thereof

Abstract

This application discloses a composite mineralization material, its preparation method, and its application, belonging to the technical field of mineralization materials for water purification. The preparation method includes the following steps: (1) Selecting strontium-containing ore, zinc-containing ore, metasilicic acid-containing ore, and carbonate-containing ore from natural ores, crushing the above ores respectively, and calcining them at 600-800℃ for 1-4 hours; (2) Soaking the calcined ores in pure water, then performing carbonation treatment, air-drying, and performing component analysis to screen and obtain the strontium-containing mineralization material, zinc-containing mineralization material, metasilicic acid-containing mineralization material, carbonate-containing mineralization material, and basic material; (3) Crushing the mineralization material and basic material again, mixing them according to the weight ratio to obtain the composite mineralization material. The composite mineralization material prepared by this method can solve the problem of excessive metal elements and organic matter in natural ores, and can achieve stable dissolution of minerals, reduce scaling, and improve the service life of water purification devices.

Description

Technical Field

[0001] This application relates to a composite mineralization material, its preparation method, and its application, belonging to the technical field of mineralization materials for water purification. Background Technology

[0002] Water is essential for normal human life activities, and the safety of drinking water is related to the health and development of all mankind. At present, in order to improve the safety of drinking water, consumers often install purification devices to purify the water themselves, such as using reverse osmosis water purifiers or products containing water purification filters to obtain pure water that can be directly consumed.

[0003] While previous purification devices could reduce impurities in water, they couldn't provide mineralized water. Therefore, researchers added mineralizing filters to the purification devices to dissolve mineral elements into the purified water, thus meeting the human body's need for trace elements. However, current mineralizing filters use minerals that may contain excessive levels of certain metals or organic matter, affecting water safety. Furthermore, current mineralizing filters have a large leaching rate, which diminishes significantly over time, making it difficult to maintain a stable leaching of any single mineral element. This results in a significant difference in mineral content between newly replaced filters and those used for a period of time. Therefore, there is a lack of a mineralizing material that allows for stable mineral penetration. Moreover, due to the large leaching rate, water purifiers with added mineralizing filters are more prone to scaling than those without, affecting normal water output and reducing the lifespan of the purification device. Summary of the Invention

[0004] To address the aforementioned issues, a composite mineralization material, its preparation method, and its application are provided. The composite mineralization material prepared by this method can solve the problem of excessive metal elements and organic matter in natural ores, and can achieve stable mineral dissolution, reduce scaling, and improve the service life of water purification devices.

[0005] According to one aspect of this application, a composite mineralization material is provided, comprising, by weight parts:

[0006] The minerals consist of 5-15 parts mineralized material and 15-25 parts base material. The mineralized material is selected from at least one of strontium-containing minerals, zinc-containing minerals, metasilicic acid-containing minerals, and carbonate-containing minerals. The strontium content in the strontium-containing minerals is not less than 0.05%, the zinc content in the zinc-containing minerals is not less than 0.5%, the silicate content in the metasilicic acid-containing minerals is not less than 3%, and the carbonate content in the carbonate-containing minerals is not less than 5%.

[0007] The content of lead, cadmium, chromium, mercury, and arsenic in the mineralized material is all less than 0.005%;

[0008] The basic material contains 15-50% Si, 5-30% O, and 5-30% C.

[0009] The aforementioned composite mineralizer uses a base material as the main component, which serves as the core carrier of the mineralizer. The mineralizer forms a complex and antagonistic effect with the base material, and is distributed on the surface and in the pores of the base material. The addition of the base material mainly acts as a load carrier. The content of the base material is higher than that of the mineralizer, which can promote the slow dissolution of the mineralizer and make the dissolution rate of the minerals regular, thereby achieving a relatively stable dissolution of the minerals. According to actual needs, the mineralizer can be selected from at least one of strontium-containing mineralizers, zinc-containing mineralizers, metasilicic acid-containing mineralizers, and carbonate-containing mineralizers, thereby achieving the dissolution of the aforementioned minerals. The strontium-containing mineralizer contains no less than 0.05% strontium, ensuring that the strontium ion concentration in the purified water is ≥0.2 mg / L, meeting the national standard for mineral water. The zinc-containing mineralizer contains no less than 0.5% zinc, ensuring that the zinc ion concentration in the purified water is ≥0.05 and ≤0.2 ppm. The metasilicic acid-containing mineralizer contains no less than 3% silicate, ensuring that the metasilicic acid concentration in the purified water is ≥0.5 ppm. The carbonate-containing mineralizer contains no less than 5% carbonate, enabling the alkalization of the purified water, raising the pH by 0.5-1, resulting in weakly alkaline mineral water.

[0010] Optionally, the mineralized material is selected from at least strontium-containing mineralized materials and zinc-containing mineralized materials in a weight ratio of 8:2.

[0011] This approach can ensure the simultaneous release of both strontium and zinc, and the release of both elements conforms to the body's absorption patterns. Strontium can promote bone development, maintain normal bodily functions, and prevent cardiovascular diseases. Zinc is an essential trace element that promotes growth and development and is a major component of many synthetic enzymes in the human body.

[0012] Optionally, the minerals are selected from strontium-containing minerals, zinc-containing minerals, metasilicic acid-containing minerals, and carbonate-containing minerals in a weight ratio of 8:2:2:1.4.

[0013] The composite mineralized material composed of the above substances can produce a composite drinking water containing multiple minerals: strontium, zinc, and metasilicic acid, and can also meet the function of weak alkalinity.

[0014] Optionally, when the particle size of the mineralized material is 80-200 mesh, the particle size of the base material is 60-300 mesh, and the composite mineralized material further includes 60-100 parts of activated carbon powder with a particle size of 60-300 mesh, and the composite mineralized material is made into carbon rods.

[0015] The carbon rods prepared above can be used in water purification devices to improve the content of mineral elements in purified water and enhance water safety.

[0016] Optionally, when the particle size of the mineralized material is 1-5 mm, the particle size of the base material is 0.5-5 mm, and the composite mineralized material is directly filled into the filter element as mineralized particles.

[0017] The aforementioned mineralized particles, when filled into the filter element, can be used in water purification devices, water heaters, thermos cups, and other products, all of which can achieve the remineralization function of drinking water, resulting in healthy drinking water.

[0018] According to another aspect of this application, a method for preparing the composite mineralized material described in any of the above claims is provided, comprising the following steps:

[0019] (1) Select strontium-containing ore, zinc-containing ore, metasilicic acid-containing ore, and carbonate-containing ore from natural ores, crush the above ores separately, and calcine them at 600-800℃ for 1-4 hours respectively;

[0020] (2) The calcined ore was soaked in pure water, then carbonated, and air-dried. The composition was analyzed and the strontium-containing mineral, zinc-containing mineral, metasilicic acid-containing mineral, carbonate-containing mineral and basic material were obtained.

[0021] (3) The mineralized material and the base material are crushed again and mixed according to the weight ratio to obtain the composite mineralized material.

[0022] After preliminary screening, crushing, calcination, soaking and carbonation, natural ores are screened again to obtain corresponding minerals and basic materials. For example, after strontium-containing ores undergo preliminary screening, crushing, calcination, soaking and carbonation, component analysis is performed to screen out the corresponding minerals and basic materials for use in the preparation of subsequent composite mineral materials.

[0023] The crushing in step (1) is to improve firing efficiency, reduce energy consumption, and facilitate the initial removal of harmful organic matter and metal elements from the ore to obtain safe and reliable mineralized material. The firing time and temperature can be set according to the properties of the ore. When the C / O content of the natural ore exceeds 5%, the firing time should be appropriately increased and the firing temperature should be appropriately extended to burn off as much of the organic components contained in the ore as possible. When the porosity exceeds 3m 2 When the ore content is / g, the firing time can be appropriately reduced to lower energy consumption.

[0024] Firing temperature can affect the total dissolved solids (TDS) content of composite mineralized materials after water immersion.

[0025] For example, the firing temperature can be any of 600℃, 610℃, 620℃, 630℃, 640℃, 650℃, 660℃, 670℃, 680℃, 690℃, 700℃, 710℃, 720℃, 730℃, 740℃, 750℃, 760℃, 770℃, 780℃, 790℃, 800℃, or any temperature between these values. The firing time can be any of 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, or any time between these values.

[0026] Optionally, the particle size of the ore after crushing in step (1) shall not be greater than 5 mm.

[0027] Optionally, the soaking time in pure water in step (2) is 12-72 hours. For example, the soaking time can be 12 hours, 16 hours, 20 hours, 24 hours, 28 hours, 32 hours, 36 hours, 40 hours, 44 hours, 48 ​​hours, 52 hours, 56 hours, 60 hours, 64 hours, 68 hours, 72 hours, or any time in between.

[0028] Soaking the calcined ore in pure water allows the powder or inorganic salts formed after the calcination of C / O in the mineralized material to dissolve in the pure water, and the residues of C / O or organic matter such as moss in the base material to dissolve in the water. This improves the cleanliness of the mineralized material, facilitates the smooth progress of subsequent carbonation treatment, and lays the foundation for the relatively stable dissolution of minerals.

[0029] Optionally, the carbonation treatment in step (2) is as follows: after rinsing with pure water, carbon dioxide gas is continuously introduced to keep the carbon dioxide in the water in a saturated dissolved state for carbonation cleaning treatment. The duration of this process is 1-4 hours.

[0030] For example, the carbonation treatment time can be 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, or any time in between.

[0031] The above-mentioned carbonation cleaning treatment is to dissolve the calcium carbonate on the surface of the material into calcium bicarbonate. If the carbonation treatment time is less than 1 hour, the surface cleaning will be incomplete. If the carbonation treatment time is more than 4 hours, too much will be dissolved and a lot of material will be lost. In addition, the carbonation treatment performed after firing can also improve the stability of minerals and achieve a more stable dissolution of elements.

[0032] The aforementioned natural minerals can be selected from the following regions: volcanic rocks of Chengmai, Hainan; mudstone of Changshou, Pengshan; dolomite of Tibet; basalt of Tianshan; basalt of Changbai Mountain; phyllite of Kunlun Mountain; limestone of Tianshan; zeolite of Siming Mountain; olivine of Gongga Mountain; jade-like carbonate rock of Kunlun Mountain; maifanite of Tianshan; and dolomite of Guangxi.

[0033] Optionally, the composite mineralization material has a stable strontium ion precipitation concentration, and the strontium ion precipitation concentration in the produced water after 2000L is ≤0.4ppm lower than the initial strontium ion precipitation concentration in the produced water.

[0034] According to another aspect of this application, a water purifier is provided, which uses the above-mentioned composite mineralized material or the composite mineralized material prepared by the above-mentioned method. The water purifier is provided with a purification filter element, and a carbon rod made of the composite mineralized material and mineralized particles made of the composite mineralized material are installed in the purified water output end of the purification filter element; or, the water purifier is provided with an RO filter element, and a carbon rod made of the composite mineralized material and mineralized particles made of the composite mineralized material are installed in the central tube of the RO filter element.

[0035] The beneficial effects of this application include, but are not limited to:

[0036] 1. The composite mineralizing material of this application can dissolve a variety of minerals as needed, depending on the type and proportion of minerals, to achieve the function of remineralizing pure water while meeting the water needs of different groups of people. It does not contain excessive metal elements and organic matter, thus improving the safety and reliability of water use.

[0037] 2. The composite mineralization material of this application can be set to different particle sizes according to the usage requirements, and the particle size of the base material can be adjusted accordingly to prepare carbon rods or directly fill the filter element, thereby improving the application scenarios of the mineralization material.

[0038] 3. According to the preparation method of the composite mineralized material of this application, the screened ore is calcined, soaked in pure water and carbonated to remove harmful substances and stabilize mineral elements, so as to obtain a safe and reliable multi-component mineralized material. The above treatment can make the minerals dissolve steadily, reduce the scaling of the water purification device and extend the service life of the water purification device. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0040] Figure 1 This is an appearance diagram of the mineralized material with a particle size of 120-200 mesh involved in Example 1 of this application;

[0041] Figure 2 This is an appearance diagram of the carbon rod prepared according to carbon rod formulation scheme 9 in Example 1 of this application;

[0042] Figure 3 This is an appearance diagram of the mineralized material with a particle size of 1-5 mm involved in Example 2 of this application. Detailed Implementation

[0043] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0044] Unless otherwise specified, the raw materials used in the embodiments and comparative examples of this application were all purchased commercially.

[0045] Unless otherwise specified, the methods used in the embodiments and comparative examples of this application are conventional methods in the prior art.

[0046] Example 1

[0047] This embodiment relates to a method for preparing a composite mineralization material, including the following steps:

[0048] (1) Select strontium-bearing ore from natural ore, crush the ore to a particle size of less than 5 mm, and calcine it for 3 hours;

[0049] (2) The calcined ore is soaked in pure water for 24 hours, then rinsed with pure water and carbon dioxide gas is continuously introduced to keep the carbon dioxide in the water saturated and dissolved for carbonation cleaning treatment. This process lasts for 2 hours. After air drying, the composition is analyzed and the strontium-containing mineral and basic material are obtained by screening. The strontium-containing mineral contains not less than 0.05% strontium, and the contents of lead, cadmium, chromium, mercury and arsenic are all less than 0.005%. The basic material contains 30% Si, 15% O, and 15% C.

[0050] (3) The mineralized material and the base material are crushed again. The mineralized material is 5g, 10g and 15g respectively. Then it is mixed with the base material 25g, 20g and 15g and the activated carbon powder 100g to prepare a carbon rod of 53*35*135. The particle size of the base material and the activated carbon powder is 60-300 mesh.

[0051] The carbon rod composite mineralization material was prepared according to the above steps. Specific conditions and water quality testing results are detailed in Table 1.

[0052] Table 1

[0053]

[0054] Figure 1 The image shows the appearance of mineralized materials with a particle size of 120-200 mesh. Figure 2 The image shows the appearance of the carbon rods prepared according to scheme 9 in Table 1. Figure 2 Image (A) shows the test results for the carbon rod. Figure 2(B) is a top view of the carbon rod. According to the data in Table 1, if the particle size of the mineralizer is too small, it will lead to increased loss; if it is too large, it will easily detach, thus neither is compatible with the carbon rod. Only a particle size within the range of 80-200 mesh can achieve compatibility with the carbon rod. Furthermore, the particle size of the mineralizer affects the leaching concentration of the minerals; if the ore firing temperature is too low, the TDS content will increase, posing a risk of excessive organic matter. The firing temperature will also affect the leaching rate of the minerals to some extent. In carbon rod formulation schemes 6, 9, 13, 14, and 15, the composite mineralizers all exhibit stable strontium ion precipitation. Specifically, the strontium ion concentration in the produced water after 2000L of boiling water decreased by no more than 0.4ppm compared to the initial strontium ion concentration. At the same firing temperature, the amount of mineralizer added affected the initial and subsequent strontium concentrations in the produced water. The more mineralizer added, the higher the initial and subsequent strontium concentrations in the produced water. However, the differences between the initial and subsequent strontium concentrations were roughly the same, demonstrating that the above methods can achieve relatively stable mineral dissolution and improve water quality consistency.

[0055] A water purifier is provided with a purification filter element, which may be an ultrafiltration filter element or a nanofiltration filter element. The purification filter element uses a carbon rod made of the aforementioned composite mineralized material, and the carbon rod is specifically installed at the purified water output end of the purification filter element.

[0056] Example 2

[0057] This embodiment relates to a method for preparing a composite mineralization material, including the following steps:

[0058] (1) Select strontium-bearing ore from natural ore, crush the ore to a particle size of less than 5 mm, and calcine it for 2 hours;

[0059] (2) The calcined ore is soaked in pure water for 24 hours, then rinsed with pure water and carbon dioxide gas is continuously introduced to keep the carbon dioxide in the water saturated and dissolved for carbonation cleaning treatment. This process lasts for 2 hours. After air drying, the composition is analyzed and the strontium-containing mineral and basic material are obtained. The strontium-containing mineral contains not less than 0.05% strontium, and the contents of lead, cadmium, chromium, mercury and arsenic are all less than 0.005%. The basic material contains about 30% Si, 10% O, and 10% C.

[0060] (3) The mineralized material and the base material are crushed and screened again to obtain particles of 0.5-5mm. The mineralized material is 100g, 200g and 300g respectively, and then mixed with 500g of base material to obtain composite mineralized material. The particle size of the base material is 0.5-5mm. The composite mineralized material is installed in the filter element of the water purification device for water quality monitoring. The specific conditions of the composite mineralized material and the water quality of the tested water are detailed in Table 2.

[0061] Table 2

[0062]

[0063]

[0064] Figure 3 The image shows the appearance of mineralized materials with a particle size of 1-5mm. According to the data in Table 2, when mineralized materials and base materials are used directly as filter cartridges, the particle size of the mineralized materials affects the flow rate of the water purification device. If the particle size is less than 1mm, the water output from the purification device will be uneven, making it unusable. If the firing temperature is too low, firstly, the TDS content will increase, posing a risk of excessive organic matter; secondly, the minerals will not dissolve stably, resulting in insufficient strontium concentration in the produced water after 2000L, requiring filter cartridge replacement, thus increasing costs and inconvenience for users. At the same firing temperature, the amount of mineralized material added affects the initial strontium concentration in the produced water and the strontium concentration in the produced water after 2000L. The higher the concentration of strontium in the initial and subsequent 2000L of produced water, the higher the strontium concentration in the produced water. However, the difference between the initial and subsequent strontium concentrations is roughly the same, proving that the above schemes can achieve relatively stable mineral dissolution and improve water quality consistency. In filter cartridge ratio schemes 6, 10, 11, and 12, the composite mineralized materials also have a stable strontium ion precipitation concentration. Specifically, the strontium ion precipitation concentration in the produced water after 2000L is reduced by no more than 0.4ppm compared to the initial strontium ion precipitation concentration. Excessive flow rate of the water purification device will reduce mineral dissolution. Therefore, the filling amount can be adjusted by different flow rate requirements to achieve the goal of meeting the strontium concentration standard.

[0065] A water purifier is provided, wherein the water purifier is equipped with an RO filter element, the RO filter element uses the aforementioned composite mineralization material, and the mineral particles made of the composite mineralization material are specifically installed inside the central tube of the RO filter element.

[0066] Example 3

[0067] This embodiment is an adjustment compared to the carbon rod formulation scheme 6 in embodiment 1. For specific conditions and water quality of the tested water, please refer to Table 3. In Table 3, "-" indicates that it is the same as carbon rod formulation scheme 6.

[0068] Table 3

[0069]

[0070] According to the data in Table 3, during the preparation of basic materials and minerals, smaller particle size after ore crushing leads to an increase in TDS, while the initial and subsequent concentrations of strontium in the produced water decrease. This may be because smaller particle size increases the contact area during ore firing, resulting in increased surface porosity and causing some strontium to be burned out, making TDS more readily soluble. Insufficient soaking time in pure water also increases the amount of TDS leached out, failing to meet requirements. Furthermore, the strontium concentration dissolution also decreased slightly. Excessive soaking time in pure water did not significantly change the TDS dissolution, but the strontium concentration decreased significantly, resulting in a substandard strontium concentration after 2000L of permeate. Insufficient carbonation time increased TDS and decreased strontium dissolution, while excessive carbonation time also increased TDS and decreased strontium dissolution, resulting in a substandard strontium concentration after 2000L of permeate. Therefore, carbonation treatment needs to be within a suitable time range. The amount of base material added directly affects the TDS and strontium dissolution. Too much base material increases TDS dissolution and decreases strontium concentration, while too little base material increases both TDS and strontium concentration, and strontium cannot achieve relatively stable dissolution.

[0071] Example 4

[0072] This embodiment makes further adjustments to the filter element formulation scheme 6 in Embodiment 2. The specific conditions of the composite mineralizing materials are detailed in Table 4. In Table 4, the particle size of the zinc-containing mineralizing material, the metasilicic acid-containing mineralizing material, and the carbonate-containing mineralizing material are all 1-5 mm. The water quality of the filter element prepared above is shown in Table 5.

[0073] Table 4

[0074]

[0075] Table 5

[0076]

[0077] As shown in Table 5, a richer variety of mineralizers results in higher mineral content in the produced water. The composition of the composite mineralizer can be adjusted according to requirements. While carbonate mineralizers can affect the initial pH of the produced water, the pH of the produced water remains the same after 2000L for both solutions with and without carbonate mineralizers. Therefore, it is advisable to add additional carbonate mineralizers during filter cartridge use based on specific needs.

[0078] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A composite mineralization material, characterized in that, By weight, it includes: The minerals consist of 5-15 parts mineralized material and 15-25 parts base material. The mineralized material is selected from at least one of strontium-containing minerals, zinc-containing minerals, metasilicic acid-containing minerals, and carbonate-containing minerals. The strontium content in the strontium-containing minerals is not less than 0.05%, the zinc content in the zinc-containing minerals is not less than 0.5%, the silicate content in the metasilicic acid-containing minerals is not less than 3%, and the carbonate content in the carbonate-containing minerals is not less than 5%. The content of lead, cadmium, chromium, mercury, and arsenic in the mineralized material is all less than 0.005%; The basic material contains 15-50% silicon (Si), 5-30% oxygen (O), and 5-20% carbon (C). The preparation method of the composite mineralized material includes the following steps: (1) Select strontium-containing ore, zinc-containing ore, metasilicic acid-containing ore and carbonate-containing ore from natural ores, crush the above ores respectively, and calcine them at 600-800℃ for 1-4 hours respectively; (2) The calcined ore was soaked in pure water, then carbonated, and air-dried. The composition was analyzed and the strontium-containing mineral, zinc-containing mineral, metasilicic acid-containing mineral, carbonate-containing mineral and basic material were obtained. (3) The mineralized material and the base material are crushed again and mixed according to the weight ratio to obtain the composite mineralized material; The composite mineralization material exhibits a stable strontium ion precipitation concentration, with the strontium ion precipitation concentration in the produced water after 2000L decreasing by ≤0.4ppm compared to the initial strontium ion precipitation concentration.

2. The composite mineralization material according to claim 1, characterized in that, The mineralized material is selected from at least strontium-containing mineralized materials and zinc-containing mineralized materials in a weight ratio of 8:

2.

3. The composite mineralization material according to claim 1, characterized in that, When the particle size of the mineralized material is 80-200 mesh, the particle size of the base material is 60-300 mesh, and the composite mineralized material also includes 60-100 parts of activated carbon powder with a particle size of 60-300 mesh, and the composite mineralized material is made into carbon rods.

4. The composite mineralization material according to claim 1, characterized in that, When the particle size of the mineralized material is 1-5mm, the particle size of the base material is 0.5-5mm, and the composite mineralized material is directly filled into the filter element as mineralized particles.

5. The composite mineralization material according to claim 1, characterized in that, In step (1), the particle size of the ore after crushing is no greater than 5 mm.

6. The composite mineralization material according to claim 1, characterized in that, The soaking time in pure water in step (2) is 12-72 hours.

7. The composite mineralization material according to claim 1, characterized in that, The carbonation process in step (2) is as follows: after rinsing with pure water, carbon dioxide gas is continuously introduced to keep the carbon dioxide in the water in a saturated dissolved state for carbonation cleaning treatment. This process lasts for 1-4 hours.

8. A water purifier, using the composite mineralized material according to any one of claims 1-7, characterized in that, The water purifier is equipped with a purification filter element, and the carbon rod made of the composite mineralized material and the mineralized particles made of the composite mineralized material are installed at the purified water output end of the purification filter element; or, the water purifier is equipped with an RO filter element, and the carbon rod made of the composite mineralized material and the mineralized particles made of the composite mineralized material are installed inside the central tube of the RO filter element.

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