Formaldehyde-free adhesive for preparing silicic acid binder based on high-end diatomite and preparation method of formaldehyde-free adhesive

Abstract

The invention relates to a formaldehyde-free adhesive for preparing a silicic acid binder based on high-end diatomite and a preparation method of the formaldehyde-free adhesive, and relates to the field of chemical materials. The preparation method comprises the following steps: collecting high-end diatomite, and carrying out scientific grinding treatment to obtain treated diatomite powder; the method comprises the following steps: collecting eucalyptus bark and bagasse biomass wastes, crushing the eucalyptus bark and bagasse biomass wastes into fragments of 2-3mm, and carrying out manual mineral separation; extruding the mineral-separated biomass waste fragments into a cylinder, carrying out high-temperature carbonization treatment on the cylindrical fragments, converting the cylindrical fragments into carbon rods, and carrying out second-stage crushing on the carbon rods to obtain carbon powder with uniform particle size distribution; mixing the treated diatomite powder and carbon powder according to a certain proportion, adding a proper amount of water into the mixture, fully stirring, and adding 1.5% of a modifier in the stirring process; the formaldehyde-free adhesive disclosed by the invention does not contain harmful substances such as formaldehyde, and is environment-friendly and harmless to human health.

Description

Technical Field

[0001] The present invention relates to the field of chemical materials, and in particular to a formaldehyde-free adhesive for preparing a silicate binder based on high-end diatomaceous earth and a preparation method thereof. Background Art

[0002] As people's awareness of environmental protection and health increases, traditional formaldehyde-containing adhesives are gradually being neglected by the market due to the release of harmful substances such as formaldehyde. At the same time, the increasing shortage of global resources and the prominence of waste disposal issues have also made how to use resources efficiently and environmentally friendly a hot topic in current technical research. In this context, it is particularly important to develop an adhesive that is formaldehyde-free, environmentally friendly and has excellent performance.

[0003] Traditional adhesives are mostly based on petrochemical raw materials, which are not only limited in resources, but also may cause environmental pollution during production and use. In addition, these adhesives often contain harmful substances such as formaldehyde, which may pose a potential threat to human health if exposed and used for a long time. At the same time, traditional adhesive preparation methods often have a single technology, making it difficult to achieve efficient use of raw materials and optimize product performance.

[0004] On the other hand, biomass waste, such as eucalyptus bark and sugarcane bagasse, was often regarded as useless waste in the past. Large amounts of accumulation not only occupy land, but also may cause environmental problems. However, these wastes actually contain rich useful components such as cellulose and lignin, and have high recycling value. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a formaldehyde-free adhesive based on high-end diatomaceous earth to prepare a silicate binder and a preparation method thereof. The formaldehyde-free adhesive does not contain harmful substances such as formaldehyde, is environmentally friendly, and is harmless to human health.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A formaldehyde-free adhesive for preparing a silicate binder based on high-end diatomite and a preparation method thereof, comprising: Step 1: Collect high-end diatomaceous earth and grind it scientifically to obtain processed diatomaceous earth powder; Step 2, collecting eucalyptus bark and bagasse biomass waste, breaking them into 2-3 mm pieces, and performing manual mineral separation; Step 3: extruding the biomass waste fragments after mineral processing into a cylindrical shape, subjecting the cylindrical fragments to high-temperature carbonization treatment to convert them into carbon rods, and subjecting the carbon rods to secondary crushing to obtain carbon powder with uniform particle size distribution.

[0007] Step 4, mixing the treated diatomaceous earth powder and carbon powder in a certain proportion, adding an appropriate amount of water to the mixture, stirring it fully, and adding 1.5% of a modifier during the stirring process; Step 5, continue stirring the mixture and add chemical reagents thereto to induce a chemical reaction of silicate components in the diatomaceous earth to generate a silicic acid binder; Step 6, the reaction mixture is subjected to 800 mesh ultrafine grinding, followed by nano-flaking grinding to ensure that the passing rate of micron particle size reaches 38%; Step 7, the ground mixture is added with 20% bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber accelerator to adjust the viscosity and solid content of the mixture to obtain a formaldehyde-free adhesive product.

[0008] In a preferred embodiment of any of the above schemes, the high-end diatomaceous earth is modified by heat treatment.

[0009] In a preferred embodiment of any of the above schemes, the biomass waste is converted into a powdery substance that can be used to enhance the performance of the adhesive through crushing, screening and drying.

[0010] In a preferred embodiment of any of the above schemes, the artificial mineral separation technology includes screening, air separation, and magnetic separation; In a preferred embodiment of any of the above schemes, the stirring process can adopt mechanical stirring, ultrasonic stirring or other effective stirring methods.

[0011] In a preferred embodiment of any of the above schemes, the modifier is a silane coupling agent.

[0012] In a preferred embodiment of any of the above schemes, the mixture is continuously stirred and a chemical reagent is added thereto to induce a chemical reaction of silicate components in the diatomaceous earth to generate a silicic acid binder, wherein the chemical reagent includes an acid, an alkali or a salt substance.

[0013] In a preferred embodiment of any of the above schemes, the temperature range in which the silicate components in the diatomaceous earth undergo chemical reaction is 30°C.

[0014] In a preferred embodiment of any of the above schemes, the viscosity of the prepared mixture is 11,000 centipoise and the solid content is 60%.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The adhesive prepared by this method is an aldehyde-free product, does not contain harmful substances such as formaldehyde, is environmentally friendly, and harmless to human health. Using biomass waste such as eucalyptus bark and bagasse as raw materials realizes the recycling of waste, which not only saves resources but also reduces the impact of waste on the environment; through scientific processing, such as high-temperature carbonization and secondary crushing, the biomass waste is converted into carbon powder with excellent performance, which can significantly improve the performance of the adhesive after mixing with diatomaceous earth powder. A variety of technical means are used, such as modification, ultrafine grinding and nano-flaking grinding, to improve the utilization efficiency of diatomaceous earth and biomass waste. By adjusting the ratio of diatomaceous earth powder to carbon powder, and adding 1.5% of modifiers and chemical reagents, the viscosity and solid content of the adhesive can be flexibly adjusted to meet the needs of different application scenarios.

[0016] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Some specific embodiments of the present application will be described in detail in an illustrative and non-restrictive manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 The present invention is a schematic diagram of a formaldehyde-free adhesive for preparing a silicate binder based on high-end diatomaceous earth and a preparation method thereof. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. Embodiment 1:

[0019] Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth. Embodiment 2:

[0020] Collect eucalyptus bark and bagasse biomass waste, crush them into 2-3 mm fragments and then carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Add appropriate amount of water and 1.5% modifier and stir them thoroughly. During continuous stirring, add chemical reagents such as dilute acid or dilute alkali to induce chemical reaction of silicate components in diatomite within a temperature range of 30°C to generate silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture are adjusted by adding 20% ​​bio-carbon powder, 70% diatomite ultrafine powder and 10% rubber to make the viscosity reach 11,000 centipoise and the solid content reach 60%, thereby obtaining a silicate binder formaldehyde-free adhesive product based on high-end diatomite. Embodiment 3:

[0021] Collect high-end diatomaceous earth, add an appropriate amount of water and 1.5% modifier, and stir thoroughly. During continuous stirring, add chemical reagents such as dilute acid or dilute alkali to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture are adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make the viscosity reach 11,000 centipoise and the solid content reach 60%, thereby obtaining a silicate binder formaldehyde-free adhesive product based on high-end diatomaceous earth. Embodiment 4:

[0022] Collect high-end diatomaceous earth, then collect biomass waste such as eucalyptus bark and bagasse, add appropriate amount of water and 1.5% modifier, and stir thoroughly. During continuous stirring, add chemical reagents such as dilute acid or dilute alkali to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture are adjusted by adding 20% ​​biocarbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make the viscosity reach 11,000 centipoise and the solid content reach 60%, thereby obtaining a silicate binder formaldehyde-free adhesive product based on high-end diatomaceous earth. Embodiment 5:

[0023] Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth. Embodiment 6:

[0024] Collect high-end diatomaceous earth, then collect pine bark and cottonseed shell biomass waste, crush them into 3-4 mm fragments and then carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth. Embodiment 7:

[0025] Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 1-2 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 2% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth. Embodiment 8:

[0026] Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 35°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth. Embodiment 9:

[0027] Collect high-end diatomite, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and then carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomite powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomite within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is ground by a jet mill to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture are adjusted by adding 20% ​​bio-carbon powder, 70% diatomite ultrafine powder and 10% rubber to make the viscosity reach 11,000 centipoise and the solid content reach 60%, thereby obtaining a silicate binder formaldehyde-free adhesive product based on high-end diatomite. Embodiment 10:

[0028] Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 9000 centipoise and the solid content reach 60%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth.

[0029] Embodiment 11: Collect high-end diatomaceous earth, then collect eucalyptus bark and sugarcane bagasse biomass waste, break them into 2-3 mm fragments and carry out artificial mineral processing to remove impurities. The biomass fragments after mineral processing are extruded into a cylindrical shape, converted into carbon rods after high-temperature carbonization treatment, and then crushed into carbon powder with uniform particle size after secondary crushing. Then, diatomaceous earth powder and carbon powder are mixed in a certain proportion, and an appropriate amount of water and 1.5% modifier are added, and they are fully stirred. During the continuous stirring process, chemical reagents such as dilute acid or dilute alkali are added to induce a chemical reaction of the silicate components in the diatomaceous earth within a temperature range of 30°C to generate a silicate binder. After the reaction is completed, the mixture is subjected to 800 mesh ultrafine grinding and nano-flaking grinding to ensure that the micron particle size pass rate is at least 38%. Finally, the viscosity and solid content of the mixture were adjusted by adding 20% ​​bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber to make its viscosity reach 11,000 centipoise and the solid content reach 50%, thus obtaining a silicate binder formaldehyde-free adhesive product prepared based on high-end diatomaceous earth.

[0030] By comparing Examples 1 to 10 with Comparative Examples 1 to 3, the advantages of the Examples over the Comparative Examples can be analyzed in detail. The following is a detailed comparative analysis: Compared with Comparative Example 1: In Comparative Example 1, only carbonized biomass waste was added, and no high-end diatomaceous earth was added.

[0031] Advantages of embodiments 1 to 10: In Examples 1 to 10, high-end diatomaceous earth has good processing properties and can be fully mixed with other raw materials during the preparation process to form a uniform adhesive system. Its fine particle structure and high specific surface area are conducive to the dispersion and stability of the various components in the adhesive. In contrast, the performance of the biomass waste in Comparative Example 1 is relatively simple. Examples 1 to 10 optimize the formula and preparation process by adjusting high-end diatomaceous earth and biomass waste and the treatment process of biomass waste to enhance the bonding strength and stability of the adhesive. However, the bonding degree and stability of the formaldehyde-free adhesive in Comparative Example 1 are relatively low.

[0032] Compared with Comparative Example 2: In Comparative Example 2, only high-end diatomaceous earth was added, and no biomass waste was added.

[0033] Advantages of embodiments 1 to 10: In Examples 1 to 10, high-end diatomaceous earth introduces a variety of biomass wastes and undergoes a high-temperature carbonization treatment step to improve the bonding strength, water resistance and durability of the formaldehyde-free adhesive, and comprehensively improve the comprehensive performance of the silicate binder formaldehyde-free adhesive. In contrast, the performance of the high-end diatomaceous earth in Comparative Example 2 is relatively simple. Examples 1 to 10 optimize the formula and preparation process by adjusting high-end diatomaceous earth and biomass waste and the treatment process of biomass waste, so that the formaldehyde-free adhesive has excellent mechanical properties, including high bonding strength and good durability. However, the bonding degree and durability of the formaldehyde-free adhesive in Comparative Example 2 are relatively low.

[0034] Compared with Comparative Example 3: In Comparative Example 3, only high-end diatomaceous earth and biomass waste were added, and the biomass waste was not carbonized.

[0035] Advantages of embodiments 1 to 10: In Examples 1 to 10, biomass waste can be converted into biomass carbon after carbonization treatment. Biomass carbon has a porous structure and a high specific surface area, and can be used as a high-quality raw material in formaldehyde-free adhesives. The high adsorption and chemical stability of biomass carbon help to improve the overall performance of the adhesive and enhance the bonding strength and durability of the adhesive. In contrast, the overall performance of the high-end diatomaceous earth and biomass waste in Comparative Example 3 is relatively simple. Examples 1 to 10 optimize the formula and preparation process by adjusting the high-end diatomaceous earth and biomass waste and the processing process of biomass waste to enhance the bonding strength and stability of the adhesive. However, the overall performance of the formaldehyde-free adhesive in Comparative Example 1 is relatively low.

[0036] In summary, compared with Comparative Examples 1 to 3, the formaldehyde-free adhesives in Examples 1 to 10 have higher bonding strength, water resistance and durability, and have the advantages of significant environmental performance, high performance and outstanding cost-effectiveness.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A formaldehyde-free adhesive prepared from a silicate binder based on high-end diatomite and a preparation method thereof, characterized in that: The following steps are involved: Step 1, collect high-end diatomaceous earth and perform scientific grinding to obtain processed diatomaceous earth powder; Step 2, collecting eucalyptus bark and bagasse biomass waste, breaking them into 2-3 mm pieces, and performing manual mineral separation; Step 3, extruding the biomass waste fragments after mineral processing into a cylindrical shape, subjecting the cylindrical fragments to high-temperature carbonization treatment to convert them into carbon rods, and subjecting the carbon rods to secondary crushing to obtain carbon powder with uniform particle size distribution; Step 4, mixing the treated diatomaceous earth powder and carbon powder in a certain proportion, adding an appropriate amount of water to the mixture, stirring it fully, and adding 1.5% of a modifier during the stirring process; Step 5, continue stirring the mixture and add chemical reagents thereto to induce a chemical reaction of silicate components in the diatomaceous earth to generate a silicic acid binder; Step 6, the reaction mixture is subjected to 800 mesh ultrafine grinding, followed by nano-flaking grinding to ensure that the passing rate of micron particle size reaches 38%; Step 7, the ground mixture is added with 20% bio-carbon powder, 70% diatomaceous earth ultrafine powder and 10% rubber accelerator to adjust the viscosity and solid content of the mixture to obtain a formaldehyde-free adhesive product.

2. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 1, characterized in that: The high-end diatomaceous earth is modified by heat treatment.

3. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 2, characterized in that: The biomass waste is transformed into a powdery substance that can be used to enhance the performance of the adhesive through crushing, screening and drying.

4. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 3, characterized in that: Artificial mineral processing technologies include screening, wind separation and magnetic separation.

5. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 4, characterized in that: The stirring process may be carried out by mechanical stirring, ultrasonic stirring or other effective stirring methods.

6. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 5, characterized in that: The modifier is a silane coupling agent.

7. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 3, characterized in that: The mixture is continuously stirred and chemical reagents are added thereto to induce a chemical reaction of silicate components in the diatomaceous earth to generate a silicic acid binder, wherein the chemical reagents include acid, alkali or salt substances.

8. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 7, characterized in that: The temperature range for chemical reactions of silicate components in diatomaceous earth is 30°C.

9. The formaldehyde-free adhesive for preparing silicate binder based on high-end diatomite and the preparation method thereof according to claim 8, characterized in that: The viscosity of the prepared mixture is 11000 centipoise and the solid content is 60%.

10. A formaldehyde-free adhesive for preparing a silicate binder from high-end diatomaceous earth obtained by the preparation method according to any of the preceding claims.

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