A rock wool inorganic adhesive and its application in rock wool products

Abstract

The application relates to the technical field of building materials, and discloses a rock wool inorganic adhesive and application of the rock wool inorganic adhesive in rock wool products. The rock wool inorganic adhesive comprises two components A and B, wherein the raw materials of the component A are mixed according to the following weight percentage ratio: 40-45% of mineral powder, 3-5% of cement, 3-5% of bentonite, 0.05-0.10% of caustic soda and 45-50% of water; the component B is water glass. The raw materials of the component A are mixed according to the weight percentage ratio to obtain a slurry, then the slurry is stirred with the water glass of the component B according to a mass ratio of 0.8-1:1 to obtain the rock wool inorganic adhesive. The rock wool inorganic adhesive is uniformly sprayed on rock wool fibers according to a glue-cotton ratio of 0.9-1:1, and then the rock wool fibers are pressed to obtain the rock wool product. The rock wool inorganic adhesive provided by the application has the advantages of simple and easy preparation, low cost, energy saving and environmental protection, excellent adhesive performance, greatly improved water resistance and durability of the rock wool, and easy popularization and use.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to an inorganic rock wool adhesive and its application in rock wool products. Background Technology

[0002] Rock wool is made primarily from high-quality basalt and dolomite. After melting at temperatures above 1450℃, it is centrifuged into fibers using an internationally advanced four-axis centrifuge. Simultaneously, a certain amount of binder, dust-proofing oil, and water-repellent agent are sprayed in. The fibers are then collected by a wool collector, processed using a pendulum method, and then laid in a three-dimensional manner before solidification and cutting to create rock wool products of different specifications and applications. Currently, plasma technology can be used to rapidly transform hazardous waste such as fly ash from waste-to-energy plants and gold tailings containing cyanide into glassy rock wool at temperatures up to 1700℃, solidifying heavy metals in the hazardous waste and achieving high-value utilization of the waste.

[0003] The main components of existing rock wool adhesives or rock wool binders are organic materials such as resins. These organic binders have a high organic content and are prone to producing toxic and polluting gases during high-temperature use. Furthermore, the preparation process is complex, and the resulting rock wool products may swell and disintegrate when exposed to water, and age and pulverize after long-term use. This poses a hidden danger to large-scale promotion and application, and is a pain point in the market. Summary of the Invention

[0004] In view of the problems and shortcomings of the existing technology, the purpose of this invention is to provide an inorganic rock wool adhesive and its application in rock wool products.

[0005] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0006] The first aspect of this invention provides an inorganic rock wool adhesive, comprising two components, A and B; the raw materials of component A are formulated by weight percentage as follows: 40%–45% mineral powder, 3%–5% cement, 3%–5% bentonite, 0.05%–0.10% caustic soda, and 45%–50% water; the component B is sodium silicate.

[0007] According to the rock wool inorganic adhesive, preferably, the mass ratio of component A to component B is 0.8 to 1:1.

[0008] According to the rock wool inorganic adhesive, preferably, the modulus of the sodium silicate is 2.1 to 2.3.

[0009] According to the described rock wool inorganic adhesive, preferably, the mineral powder is solid waste generated by steel production enterprises, and the mineral powder has a mesh size of 300 mesh. The mineral powder can react with water glass to form silicate minerals with excellent water resistance and durability. Moreover, the mineral powder is an industrial waste with very low cost. The bentonite is calcium-based bentonite with a mesh size of 300 mesh. Calcium-based bentonite is an excellent suspending agent, ensuring that component A remains in a colloidal state.

[0010] According to the aforementioned rock wool inorganic adhesive, preferably, the cement is C. 425 Ordinary silicate cement. This cement can react rapidly with water glass (component B), serving as an inexpensive quick-setting agent and enabling the rapid industrial production of rock wool products, saving on the energy-intensive drying process currently used in technology.

[0011] According to the described rock wool inorganic adhesive, preferably, the purity of the caustic soda is not less than 95%. The caustic soda in component A of this invention is an excellent stabilizer. Sodium ions in the caustic soda can enter and become interlayer cations in calcium-based bentonite, thus sodium-ifying the calcium-based bentonite, improving its performance, and ensuring the stability of the component A slurry.

[0012] According to the rock wool inorganic adhesive, preferably, the water has a mineralization degree of less than 1 g / L.

[0013] The second aspect of this invention provides the application of the rock wool inorganic adhesive described in the first aspect in the preparation of rock wool products.

[0014] According to the application, preferably, when preparing rock wool products, the A and B components of the rock wool inorganic adhesive are sprayed onto the rock wool fibers at a mass ratio of 0.8 to 1:1.

[0015] According to the application described, preferably, the mass ratio of the rock wool inorganic adhesive to the rock wool fiber during spraying is 0.9 to 1:1.

[0016] A third aspect of the present invention provides a rock wool product prepared using the rock wool inorganic adhesive described in the first aspect.

[0017] The fourth aspect of this invention provides a method for preparing the rock wool product described in the third aspect, wherein the ore is crushed and melted to obtain a molten material, the molten material is drawn into fibers, and components A and B of the rock wool inorganic adhesive are sprayed onto the fibers at a mass ratio of 0.8 to 1:1. After the spraying is completed, the rock wool product is obtained by pressing and molding.

[0018] According to the preparation method of the rock wool product, preferably, the mass ratio of the rock wool inorganic adhesive to the rock wool fiber during spraying is 0.9 to 1:1.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The inorganic rock wool adhesive provided by this invention comprises two components, A and B, wherein component B is sodium silicate. Component A is obtained by mixing mineral powder, cement, bentonite, caustic soda, and water. In the caustic soda of component A slurry, sodium ions can enter and become interlayer cations of calcium-based bentonite, thereby sodiumizing the calcium-based bentonite, improving its performance, and ensuring the stability of the slurry. Calcium-based bentonite is a good suspending agent, which keeps the slurry in a colloidal state. During the mixing process of component A slurry and sodium silicate, the mineral powder in the slurry reacts with sodium silicate to generate silicate minerals with excellent water resistance and durability, thus giving the adhesive good water resistance and durability. This ensures that the prepared rock wool product does not swell or disintegrate when exposed to water, and does not age or pulverize after long-term use. Cement, as a quick-setting agent, can react rapidly with sodium silicate, making rapid industrial production of rock wool products possible and saving the energy-intensive drying process currently used in technology.

[0021] (2) The preparation method of the rock wool inorganic adhesive provided by the present invention is simple and easy to implement, low in cost, energy-saving and environmentally friendly, and easy to promote and use. Attached Figure Description

[0022] Figure 1 This is a sample image of the cured rock wool inorganic adhesive of the present invention. Detailed Implementation

[0023] The following embodiments are only for further elaboration of the present invention. It should be noted that all techniques and scientific terms used in this invention, unless otherwise stated, have the same meaning as those in the technical field to which this invention pertains. Experimental methods in the following embodiments that do not specify specific conditions all employ conventional techniques in this technical field or follow the conditions recommended by the manufacturer; reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0025] Example 1

[0026] An inorganic rock wool adhesive comprises two components, A and B. The raw materials of component A are formulated by weight as follows: 40% mineral powder, 5% cement, 4.9% bentonite, 0.10% caustic soda, and 50% water. Component B is liquid sodium silicate with a modulus of 2.3.

[0027] A rock wool product is prepared using the above-mentioned inorganic rock wool adhesive. The preparation method is as follows:

[0028] (1) High-quality basalt, dolomite and other raw materials are transported to a cupola furnace or electric furnace by a conveyor belt for melting to obtain molten material;

[0029] (2) The molten material is fed into a four-roller centrifuge and centrifuged at high speed to form fibers. Then the fibers are sprayed with adhesive. When spraying adhesive, the two components A and B in the above-mentioned rock wool inorganic adhesive are sprayed evenly onto the fibers in a mass ratio of 1:1. The mass ratio of inorganic adhesive to fiber is 1:1. After the adhesive is sprayed, the rock wool product is obtained.

[0030] Example 2

[0031] An inorganic rock wool adhesive comprises two components, A and B. The raw materials of component A are formulated by weight as follows: 42% mineral powder, 3.5% cement, 4.45% bentonite, 0.05% caustic soda, and 47% water. Component B is liquid sodium silicate with a modulus of 2.4.

[0032] A rock wool product is prepared using the above-mentioned inorganic rock wool adhesive. The preparation method is as follows:

[0033] (1) High-quality basalt, dolomite and other raw materials are transported to a cupola furnace or electric furnace by a conveyor belt for melting to obtain molten material;

[0034] (2) The molten material is fed into a four-roller centrifuge and centrifuged at high speed to form fibers. Then, the fibers are sprayed with adhesive. When spraying adhesive, the two components A and B of the above-mentioned rock wool inorganic adhesive are sprayed evenly onto the fibers at a mass ratio of 0.8:1, wherein the mass ratio of inorganic adhesive to fiber is 1:1. After the adhesive spraying is completed, the rock wool product is obtained.

[0035] Example 3

[0036] An inorganic rock wool adhesive comprises two components, A and B. The raw materials of component A are formulated by weight as follows: 43% mineral powder, 3% cement, 3.93% bentonite, 0.07% caustic soda, and 45% water. Component B is liquid sodium silicate with a modulus of 2.35.

[0037] A rock wool product is prepared using the above-mentioned inorganic rock wool adhesive. The preparation method is as follows:

[0038] (1) High-quality basalt, dolomite and other raw materials are transported to a cupola furnace or electric furnace by a conveyor belt for melting to obtain molten material;

[0039] (2) The molten material is fed into a four-roller centrifuge and centrifuged at high speed to form fibers. Then, the fibers are sprayed with adhesive. When spraying adhesive, the two components A and B of the above-mentioned rock wool inorganic adhesive are sprayed evenly onto the fibers at a mass ratio of 0.9:1, wherein the mass ratio of inorganic adhesive to fiber is 0.9:1. After the adhesive spraying is completed, the rock wool product is obtained.

[0040] Comparative Example 1

[0041] A rock wool product is prepared using a method basically the same as in Example 1, except that the adhesive used in this example is an organic resin adhesive, rather than the inorganic adhesive proposed in this invention. The specific steps are as follows:

[0042] (1) High-quality basalt, dolomite and other raw materials are transported to a cupola furnace or electric furnace by a conveyor belt for melting to obtain molten material;

[0043] (2) The molten material is fed into a four-roller centrifuge and centrifuged at high speed to form fibers. Then the fibers are sprayed with adhesive. During the adhesive spraying, the organic resin adhesive is evenly sprayed onto the fibers. The mass ratio of the rock wool inorganic adhesive to the fiber is 1:1, and rock wool fibers are obtained.

[0044] (3) Collect, solidify, and press the rock wool fibers to obtain the rock wool product.

[0045] Performance testing

[0046] 1. The rock wool inorganic adhesive prepared in Example 1 was sent to the laboratory of the School of Resources and Environment, Henan Polytechnic University for testing. The test results are shown in Table 1:

[0047] The properties of the rock wool inorganic adhesive of the present invention are as follows:

[0048]

[0049] As can be seen from Table 1, the rock wool inorganic adhesive prepared by the present invention has excellent bonding performance, and after curing, it has good compressive strength and a high ignition point.

[0050] 2. The rock wool products prepared in Example 1 and Comparative Example 1 were subjected to performance tests, and the results are shown in Table 2.

[0051] The following are the performance characteristics of the rock wool products tested on the machine:

[0052]

[0053] As can be seen from the above performance comparison results, compared with existing organic resin adhesives, the inorganic adhesive for rock wool prepared in this invention can enable rock wool products to have better compressive strength, tensile strength, water resistance and durability.

[0054] In summary, the preparation method of this invention is simple, easy to implement, low in cost, energy-saving and environmentally friendly. The prepared inorganic adhesive gives rock wool products good water resistance and durability, and is easy to promote and use.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rock wool inorganic adhesive, characterized in that: It includes two components, A and B; The weight percentages of the raw materials for component A are as follows: Mineral powder 40%–45%, cement 3%–5%, bentonite 3%–5%, caustic soda 0.05%–0.10%, water 45%–50%; Component B is sodium silicate.

2. The rock wool inorganic adhesive according to claim 1, characterized in that, The mass ratio of component A to component B is 0.8 to 1:

1.

3. The rock wool inorganic adhesive according to claim 2, characterized in that, The modulus of the sodium silicate is 2.1 to 2.

3.

4. The rock wool inorganic adhesive according to claim 3, characterized in that, The mineral powder is a solid waste product from the steel production process, and the mineral powder has a mesh size of 300 mesh; the bentonite is calcium-based bentonite, and the calcium-based bentonite has a mesh size of 300 mesh.

5. The rock wool inorganic adhesive according to claim 3, characterized in that, The cement is P·O42.5 cement, and the purity of the caustic soda is not less than 95%.

6. The use of the rock wool inorganic adhesive according to any one of claims 1 to 5 in the preparation of rock wool products.

7. The application according to claim 6, characterized in that, When preparing rock wool products, the A and B components of the rock wool inorganic adhesive are sprayed onto the rock wool fibers at a mass ratio of 0.8 to 1:

1.

8. Rock wool products prepared using the rock wool inorganic adhesive according to any one of claims 1 to 5.

9. A method for preparing the rock wool product according to claim 8, characterized in that, The ore is crushed and melted to obtain molten material, which is then drawn into fibers. Components A and B of the rock wool inorganic adhesive described in any one of claims 1 to 6 are sprayed onto the fibers at a mass ratio of 0.8 to 1:

1. After the adhesive is sprayed, the fibers are pressed and molded to obtain the rock wool product.

10. The method for preparing rock wool products according to claim 9, characterized in that, The mass ratio of the inorganic rock wool adhesive to the rock wool fiber during spraying is 0.9 to 1:1.

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