A water-quenched titanium slag microbead lightweight thermal insulation material and its preparation method

Abstract

The present invention discloses a water-quenched titanium slag microbead lightweight thermal insulation material and a preparation method thereof, comprising the following raw material components in parts by weight: 360-600 parts of cement, 0-120 parts of solid sulfur ash, 0-120 parts of lithium slag, 0-500 parts of titanium slag microbeads, 20-80 parts of foaming agent, 25-100 parts of coagulant, and 1-10 parts of polypropylene fiber; the preparation method is: at room temperature, first stirring the powder with water, fully stirring and mixing, adding titanium slag microbeads, stirring evenly, adding foaming agent and stirring, stirring and forming after stirring is completed. The thermal insulation performance of the lightweight thermal insulation material prepared by the present application is significantly improved, and industrial waste slag is used in the preparation, which not only has low preparation cost, but also can alleviate the pressure of industrial waste slag accumulation and realize the effective secondary utilization of industrial waste slag.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation wall materials for buildings, and in particular to a water-quenched titanium slag microbead lightweight thermal insulation material and a preparation method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Cement-based lightweight insulation materials, produced by cement foaming, have been widely used in the construction industry due to their low bulk density and excellent fire and water resistance. Prior art attempts to improve the bulk density and thermal conductivity of cement-based lightweight insulation materials by replacing pore-forming agents. For example, a porous lightweight cement-based insulation material and preparation method using camphene as a pore-forming agent reduces the insulation material's bulk density by 40%-70% and its thermal conductivity by 50%-80%. However, camphene is several dozen times more expensive than conventional pore-forming agents, significantly increasing the production cost of these lightweight cement-based materials.

[0004] Adding slag to cement can help improve the bulk density and thermal insulation properties of foamed cement and broaden the application scope of lightweight thermal insulation materials. The large amount of industrial slag currently accumulated is in urgent need of efficient utilization to reduce resource waste and environmental pollution. It has low cost and large volume. Using it to improve the performance of cement-based lightweight thermal insulation materials is a two-pronged approach. Summary of the Invention

[0005] The purpose of the present invention is to address the problem of high cost of improving the current cement-based lightweight thermal insulation materials, and to provide a water-quenched titanium slag microbead lightweight thermal insulation material and a preparation method thereof. The bulk density and thermal conductivity coefficient of the cement-based lightweight thermal insulation material are improved at a lower cost, so that it has excellent structural stability and thermal insulation performance, while being environmentally friendly, avoiding waste of resources and alleviating the pressure of environmental pollution.

[0006] The technical solutions of the present invention are as follows:

[0007] A water-quenched titanium slag microbead lightweight thermal insulation material comprises the following raw material components in parts by weight: 360-600 parts of cement, 0-120 parts of solid sulfur ash, 0-120 parts of lithium slag, 0-500 parts of titanium slag microbeads, 20-80 parts of foaming agent, 25-100 parts of coagulant, and 1-10 parts of polypropylene fiber.

[0008] According to a preferred embodiment, the composition includes 360-600 parts of cement, 0-120 parts of solid sulfur ash, 0-120 parts of lithium slag, 100-500 parts of titanium slag microbeads, 50 parts of foaming agent, 40 parts of coagulant, and 2 parts of polypropylene fiber.

[0009] According to a preferred embodiment, a water-quenched titanium slag microbead lightweight thermal insulation material of the present application includes the following raw material components in parts by weight: 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 400 parts of titanium slag microbeads, 50 parts of foaming agent, 40 parts of coagulant, and 2 parts of polypropylene fiber.

[0010] The prepared lightweight thermal insulation material has low cost and excellent performance, and has good application prospects. The minimum bulk density of the prepared lightweight thermal insulation material is 460kg / m 3 Compared with cement-based lightweight insulation materials without slag, it is 34% lighter. Its weight is 1 / 4 of ordinary concrete, 1 / 3 of clay, and 1 / 2 of hollow blocks. Using this product in construction can reduce the building's weight and significantly reduce the overall cost of the building. The prepared lightweight insulation material has a minimum thermal conductivity of 0.102W / (m·K), which is 63.5% lighter than cement-based lightweight insulation materials without slag. The insulation effect is 6.5 times that of clay bricks and 13 times that of ordinary concrete. The compressive strength of the prepared lightweight insulation material is 1.57-2.54MPa, which meets the application requirements of cement-based lightweight insulation materials.

[0011] This application accelerates the setting time of lightweight thermal insulation material products by adding a coagulant, thereby improving the stability of the lightweight thermal insulation material product system; by using titanium slag microbeads and solid sulfur ash, lithium slag and other solid wastes to produce reusable thermal insulation materials, it achieves high added value utilization of titanium slag resources, and at the same time solves the problems of expensive and scarce resources in the existing technology.

[0012] Water-quenched titanium ore exhibits a certain degree of activity, allowing it to undergo a secondary hydration reaction with cement, thereby improving the interfacial bonding between titanium slag and cement. The incorporation of titanium slag microbeads significantly improves the volume stability of foamed concrete. Sulfur ash exhibits a certain degree of expansion, which can reduce the early shrinkage of foamed concrete. Lithium slag is a highly active mineral powder, with an activity of 70% after 7 days and 110% after 28 days, which can reduce the cement content in foamed concrete. Lithium slag is lightweight, porous, and has low density, reducing the bulk density of the slurry. Its water absorption allows it to be used as an internal curing agent, ensuring water availability for the later hydration of foamed concrete.

[0013] The present application also provides a method for preparing a lightweight thermal insulation material made of titanium slag microbeads, comprising the following steps: first stirring the powder with water at room temperature, fully stirring and mixing, adding the titanium slag microbeads, stirring evenly, adding a foaming agent and stirring, and molding after stirring is completed.

[0014] The present application also provides the use of titanium slag microbead lightweight thermal insulation materials in the preparation of building blocks, composite walls, etc.

[0015] Compared with the existing technology, the beneficial effects of the present invention are:

[0016] 1. Water-quenched titanium slag micro-bead lightweight insulation material can effectively reuse industrial solid waste such as titanium slag, lithium slag, and solid sulfur ash. On the one hand, it can solve the problem of the accumulation of such industrial solid waste, and on the other hand, it can optimize the use effect of existing lightweight insulation materials. In addition, it can also reduce the cost of lightweight insulation materials and lower their use costs. It has an unexpected technical effect of killing three birds with one stone.

[0017] 2. Water-quenched titanium slag micro-bead lightweight insulation material can reduce the thermal conductivity of lightweight insulation materials by 63.5% while ensuring that the compressive strength meets the requirements, significantly improving the insulation effect of the insulation material and expanding the application range of the material;

[0018] 3. Water-quenched titanium slag micro-bead lightweight insulation material can further reduce the material's bulk density by 34% while ensuring good compressive strength and thermal insulation effects, thereby significantly reducing the overall weight of the building and providing more possibilities for the building's shape. DETAILED DESCRIPTION

[0019] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0020] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0021] The titanium slag microbeads, solid sulfur ash, lithium slag, and other solid wastes used in the experimental and comparative examples were provided by a metallurgical steel mill and are considered factory waste. The present invention addresses the disposal of this solid waste. The titanium slag microbeads are water-quenched titanium slag, spherical and hollow, with a particle size of 1.15 mm to 4.75 mm. The preferred preparation environment is 20 ± 5°C and a humidity of ≥ 50%.

[0022] Experimental Example 1

[0023] 480 parts of cement, 120 parts of solid sulfur ash, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.6. After fully mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is carried out.

[0024] The measured bulk density is 675kg / m 3 , thermal conductivity is 0.195W / (m·K), and 28d compressive strength is 2.80MPa.

[0025] Experimental Example 2

[0026] 480 parts of cement, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.6. After fully mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0027] The measured bulk density is 742kg / m 3 , thermal conductivity is 0.285W / (m·K), and 28d compressive strength is 4.2MPa.

[0028] Experimental Example 3

[0029] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are stirred with water at a water-cement ratio of 0.65. After fully stirring and mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is carried out.

[0030] The measured bulk density is 640kg / m 3 , thermal conductivity is 0.162W / (m·K), and 28d compressive strength is 2.52MPa.

[0031] Experimental Example 4

[0032] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are stirred with water at a water-cement ratio of 0.65. After fully stirring and mixing, 100 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0033] Experimental Example 5

[0034] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.65. After fully mixing, 200 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0035] Experimental Example 6

[0036] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.65. After fully mixing, 300 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0037] Experimental Example 7

[0038] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.65. After fully mixing, 400 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0039] Experimental Example 8

[0040] 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.65. After fully mixing, 500 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0041] Experimental Example 9

[0042] 600 parts of cement, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.6. After fully mixing, 200 parts of titanium slag microbeads are added and stirred evenly. Then, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0043] Experimental Example 10

[0044] 540 parts of cement, 60 parts of solid sulfur ash, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.6. After fully mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is carried out.

[0045] Experimental Example 11

[0046] 540 parts of cement, 60 parts of lithium slag, 40 parts of coagulant and 2 parts of polypropylene fiber powder are mixed with water at a water-cement ratio of 0.6. After fully mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0047] Comparative Example 1

[0048] First, 600 parts of cement, 40 parts of coagulant and 2 parts of polypropylene fiber are mixed with water at a water-cement ratio of 0.6. After fully mixing, 50 parts of foaming agent are added and stirred. After stirring is completed, molding is performed.

[0049] The measured bulk density is 700kg / m3 , thermal conductivity is 0.28W / (m·K), and 28d compressive strength is 3.05MPa.

[0050] The measurement data of each experimental example and comparative example are shown in Table 1:

[0051] Table 1: Cement strength corresponding to each formulation

[0052]

[0053] As can be seen from the table above, according to the comparison of the data of Experimental Example 1, Experimental Example 10, Experimental Example 2 and Experimental Example 11 with Comparative Example 1, it can be seen that after 60 parts of solid sulfur ash were added to Experimental Example 10, the thermal conductivity was 0.195, which was 30% lower than the technical solution of Comparative Example 1 without adding solid sulfur ash. The bulk density was reduced from 700 to 687, and the compressive strength was reduced from 3.05 to 2.65. The bulk density: compressive strength = 259;. After 120 parts of solid sulfur ash were added to Experimental Example 1, the thermal conductivity was 0.195, which was 30% lower than the technical solution of Comparative Example 1 without adding solid sulfur ash. The bulk density was reduced from 700 to 675, and the compressive strength was reduced from 3.05 to 2.8. The ratio of compressive strength to bulk density was: bulk density: compressive strength = 241. By comparing Experimental Example 1 with Experimental Example 10, it can be concluded that the addition of solid sulfur ash can improve the thermal insulation performance of the material. Further increasing the amount of solid sulfur ash added can further reduce the bulk density of the lightweight thermal insulation material and increase the compressive strength of the material while maintaining a low thermal conductivity, and the value of bulk density / compressive strength is further reduced.

[0054] After 60 parts of lithium slag were added to Experimental Example 11, the thermal conductivity was 0.265, which was slightly lower than that of the technical scheme in which lithium slag was not added in Comparative Example 1. The bulk density increased from 700 to 726, but the compressive strength increased from 3.05 to 3.55, and the bulk density: compressive strength = 204, which was lower than the ratio of 229 in Comparative Example 1; after 120 parts of lithium slag were added to Experimental Example 2, the thermal conductivity was 0.285, which was higher than that of the technical scheme in which lithium slag was not added in Comparative Example 1, and the bulk density increased from 700 to 742, but the compressive strength increased from 3.05 to 4.2, and the bulk density: compressive strength = 176, which was further reduced; comparing the data of Experimental Example 11 and Experimental Example 2, it can be seen that the addition of lithium slag can enhance the compressive strength of the lightweight thermal insulation material and reduce the bulk density / compressive strength value.

[0055] According to the data comparison of Experimental Example 3 and Comparative Example 1, after the simultaneous addition of 120 parts of solid sulfur ash and 120 parts of lithium slag, the thermal conductivity of the material is 0.162, which is lower than that of Comparative Example 1 and Experimental Examples 1 and 10. The thermal insulation performance is further improved, decreasing by 42% compared to Comparative Example 1. The bulk density also decreases from 700 to 640, and the compressive strength decreases from 3.05 to 2.52, with bulk density:compressive strength = 253. Comparing the results of Experimental Examples 1, 3, 10, 2, and 11, it can be seen that the simultaneous addition of solid sulfur ash and lithium slag can further reduce the thermal insulation performance of the material, but the bulk density to compressive strength ratio will increase.

[0056] By comparing the data results of Experimental Example 9 and Comparative Example 1, it can be seen that after the addition of titanium slag microbeads, the thermal conductivity of the material is reduced to 0.145, a decrease of 48% compared with Comparative Example 1; the bulk density is reduced from 700 to 595; and the compressive strength is reduced from 3.05 to 2.02, and the ratio of bulk density to compressive strength is 294.

[0057] Comparing the data of Experimental Examples 4-8, it can be seen that the simultaneous addition of solid sulfur ash, lithium slag, and titanium slag microbeads can further reduce the thermal conductivity of the material; the bulk density is slightly higher than that of titanium slag microbeads when added alone, but is further reduced compared to the addition of solid sulfur ash and lithium slag alone; the compressive strength is improved compared to the addition of titanium slag microbeads alone, but as the addition amount of titanium slag microbeads increases, its compressive strength first decreases and then increases. In Experimental Example 7, after the simultaneous addition of 120 parts of solid sulfur ash, 120 parts of lithium slag, and 400 parts of titanium slag microbeads, the thermal conductivity of the material decreased from 0.28 to 0.102, a decrease of 64%; and the ratio of bulk density to compressive strength is 292, which is further significantly reduced compared to the addition of titanium slag microbeads alone, and the ratio of bulk density to compressive strength of the material is also reduced. Therefore, Experimental Example 4 is the optimal ratio, as shown in the following table.

[0058]

[0059]

[0060] In summary, the simultaneous addition of solid sulfur ash, lithium slag and titanium slag microbeads into the material can significantly reduce the thermal conductivity of the material, improve the thermal insulation performance of the material, broaden the application scenarios of the material, and enhance the application value of the material.

[0061] Although solid sulfur ash and lithium slag have lower densities than cement, their porous nature allows them to absorb water. Therefore, their incorporation into foamed concrete paste increases its viscosity. This results in an increase in the bulk density of the foamed concrete, but a relative decrease in its thermal conductivity. Due to its inherently high activity, lithium slag can improve the compressive strength of foamed concrete. Simultaneously incorporating lithium slag and solid sulfur ash, while increasing the water requirement, can reduce the bulk density of foamed concrete and significantly improve its compressive strength and thermal conductivity. The incorporation of titanium slag microbeads can also reduce the bulk density of foamed concrete, significantly improve its compressive strength, and reduce its thermal conductivity.

[0062] The above-described embodiments merely represent specific implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the technical concept of the present application, and all such variations and improvements fall within the scope of protection of the present application.

[0063] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of the description in this section that did not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A water-quenched titanium slag microbead lightweight thermal insulation material, characterized in that: The invention comprises the following raw material components in parts by weight: 360-600 parts of cement, 60-120 parts of solid sulfur ash, 60-120 parts of lithium slag, 100-500 parts of titanium slag microbeads, 20-80 parts of foaming agent, 25-100 parts of coagulant and 1-10 parts of polypropylene fiber.

2. The water-quenched titanium slag microbead lightweight thermal insulation material according to claim 1, characterized in that: The invention comprises the following raw material components in parts by weight: 360-600 parts of cement, 60-120 parts of solid sulfur ash, 60-120 parts of lithium slag, 300-500 parts of titanium slag microbeads, 50 parts of foaming agent, 40 parts of coagulant and 2 parts of polypropylene fiber.

3. The water-quenched titanium slag microbead lightweight thermal insulation material according to claim 1, characterized in that: The method comprises the following raw material components in parts by weight: 360 parts of cement, 120 parts of solid sulfur ash, 120 parts of lithium slag, 400 parts of titanium slag microbeads, 50 parts of foaming agent, 40 parts of coagulant and 2 parts of polypropylene fiber.

4. The water-quenched titanium slag microbead lightweight thermal insulation material according to any one of claims 1 to 3, characterized in that: The titanium slag microbeads are water-quenched titanium slag, and are spherical and hollow.

5. The water-quenched titanium slag micro-bead lightweight thermal insulation material according to claim 4, characterized in that: The particle size of the titanium slag microbeads is 1.15-4.75 mm.

6. The method for preparing the water-quenched titanium slag micro-bead lightweight thermal insulation material according to any one of claims 1 to 5, characterized in that: The steps include: First, cement, solid sulfur ash, lithium slag, coagulant and polypropylene fiber powder are stirred with water. After fully stirring and mixing, titanium slag microbeads are added. After stirring evenly, a foaming agent is added and stirred. After stirring is completed, molding is performed.

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