Solid waste-based reinforced ceramic tile adhesive and preparation method therefor

Abstract

A solid waste-based reinforced ceramic tile adhesive and a preparation method therefor. The solid waste-based reinforced ceramic tile adhesive comprises 17-22% of polyacrylamide modified solid waste residue powder, 3-7% of cement, 7-12% of tailing micro powder, 55-65% of graded tailing sand and 8-13% of a tensile adhesive. By limiting the raw material components and content of the tensile adhesive, the tensile adhesive strength of the solid waste-based adhesive with different substrates and the construction performance thereof can be ensured; and the solid waste residue powder is modified by using a very small amount of low-molecular-weight polyacrylamide, such that the stability of the system can be significantly improved, and the comprehensive performance of the solid waste-based ceramic tile adhesive can be enhanced. The solid waste-based reinforced ceramic tile adhesive comprises 90 wt% or more of solid wastes. By limiting the components and contents of each raw material, all components can act synergistically, so that the solid waste-based reinforced ceramic tile adhesive can replace traditional cementing materials such as cement, which greatly reduces the cost, realizes the comprehensive utilization of industrial solid waste materials, and has significant advantages such as saving on energy, having environmental protection and being low carbon.

Description

A solid waste-based enhanced tile adhesive and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of adhesives, and in particular to a solid waste-based reinforced tile adhesive and a preparation method thereof. Background Art

[0002] Tile adhesive is a high-quality adhesive modified by polymer with cement as the base. It is flexible and quick-drying. It is suitable for thick and thin construction and can stick tiles on various types of substrates. Tile adhesive can make up for the defects of cement and ordinary polymer mortar. It has the characteristics of wide construction range, strong adhesion, convenient construction, no need to soak tiles, walls and floors with water before construction, long hardening time, leaving construction workers with sufficient adjustment time, etc. Therefore, it has great promotion and use value.

[0003] Currently, tile adhesives are composed of cement, quartz sand, and concentrated tackifiers. With the rapid development of the construction industry, the use of tile adhesives has also increased. Statistics show that the calcination of 1 ton of cement clinker emits approximately 0.78 tons of CO2. This means that using cement as a raw material not only consumes a large amount of mineral resources but also generates significant carbon emissions. Quartz sand, a major component of tile adhesive mortar, has seen significant declines in natural sand resources or is nearing depletion, which is detrimental to ecological protection and sustainable environmental development. Furthermore, my country's annual production of industrial waste slag and tailings is increasing, but the average comprehensive utilization rate is less than 60%, indicating significant room for improvement in the resource utilization of solid waste materials. Processing these solid waste materials into tile adhesives for use in construction projects would significantly reduce the consumption of natural mineral resources such as limestone and quartz sand, saving costs and reducing carbon emissions. It would also open up new avenues for the recycling of solid waste materials. There are two obvious problems in the existing technology when solid waste materials are applied to tile adhesives: (1) it is impossible to achieve a low cement content, and the amount of cement used is still large; (2) the tensile bond strength of the tile adhesive is low and cannot meet the requirements of enhanced tile adhesives. Summary of the Invention

[0004] In response to the above problems, the present invention provides a solid waste-based reinforced tile adhesive and a preparation method thereof, which not only makes resource utilization of industrial solid waste and tailings, but also greatly reduces the amount of traditional cement materials used, and also has good tensile bonding strength.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] A solid waste-based reinforced tile adhesive comprises the following raw material components in percentage by mass: 17% to 22% of polyacrylamide-modified solid waste residue powder, 3% to 7% of cement, 7% to 12% of tailings fine powder, 55% to 65% of graded tailings sand, and 8% to 13% of a stretching adhesive;

[0007] Among them, the mass of polyacrylamide accounts for 0.3‰ to 0.5‰ of the solid waste powder raw material, and the molecular weight of the polyacrylamide is 3 million to 6 million Da; the stretching adhesive includes the following raw material components in the following mass percentages: calcium carbonate powder 32% to 35%, desulfurized gypsum powder 30% to 33%, redispersible latex powder 28% to 32%, cellulose ether 3.5% to 5% and starch ether 0.5% to 1.5%.

[0008] In the early experiments, the inventors found that solid waste-based tile adhesives accounting for more than 90wt% are difficult to achieve the tensile bonding strength requirements of cement-based reinforced materials. The inventors tried a large number of tensile adhesive types and finally selected calcium carbonate powder, desulfurized gypsum powder, redispersible latex powder, cellulose ether and starch ether as the raw material components of the tensile adhesive, and at the same time, set corresponding limits on the amount of each added. By limiting the tensile adhesive, the present invention can ensure the tensile bonding strength of solid waste-based tile adhesives with different matrix materials under different climatic conditions; improve the anti-slip properties of the bonded tiles; facilitate construction, and no water immersion treatment is required before tile construction; the construction time is long, and the solid waste-based tile adhesive slurry will not form a crust on the surface after being placed for a long time, and there is sufficient time to adjust the flatness and levelness of the tile cut surface after tiling.

[0009] Compared to the prior art, the solid waste-based reinforced tile adhesive provided by the present invention contains more than 90wt% solid waste and uses a very small amount of low-molecular-weight polyacrylamide to modify the solid waste residue powder, significantly improving the stability of the system and enhancing the overall performance of the solid waste-based tile adhesive. By limiting the composition and content of each raw material, the present invention enables the components to work synergistically and complement each other. This can replace traditional cementitious materials such as cement in the reinforced tile adhesive, significantly reducing raw material costs and achieving a comprehensive utilization of solid waste materials such as industrial waste residue, making it more environmentally friendly. At the same time, the mechanical strength (including tensile bond strength and anti-slip properties) and stability of the solid waste-based tile adhesive are improved, resulting in excellent performance, good industrial prospects, and social benefits.

[0010] Preferably, the solid waste slag powder raw material includes the following components in percentage by mass: 40% to 50% of water slag, 27% to 33% of steel slag, 13% to 17% of silicon manganese smelting slag and 8% to 12% of fly ash.

[0011] The slag contains the following components by mass: MgO 5%-15%, SiO2 30%-40%, CaO 35%-45%, Al2O3 10%-20%, Fe2O3 0-2%, and SO3 0-3%. The main mineral phases in the slag are tricalcium silicate, dicalcium silicate, calcite, magnesian olivine, calcite, and calcium aluminoferrite, and it has potential hydraulic cementing properties.

[0012] Steel slag contains the following components by weight: MgO 0-10%, SiO2 10-20%, CaO 35-45%, Al2O3 0-10%, Fe2O3 25-35%, and SO3 0-1%. Steel slag contains active minerals similar to cement, such as tricalcium silicate, dicalcium silicate, and aluminoferrite, giving it hydraulic cementitious properties.

[0013] The structure of silicon manganese smelting slag is loose. After water quenching and rapid cooling, it will form a large amount of glass, a small amount of SiO2, CaS and CaAl (AlSiO2) and CaTiO3, which are highly active.

[0014] Fly ash contains the following components by mass: MgO 0-5%, SiO2 40-60%, CaO 5-10%, Al2O3 15-30%, Fe2O3 0-10%, and SO3 0-3.0%. The main mineral phases in fly ash are quartz, tricalcium aluminate (3CaO·Al2O3), calcium sulfoaluminate (4CaO·3Al2O3·SO3), anhydrite (CaSO4), free calcium oxide, periclase, and alkaline sulfates. Except for quartz and periclase, all other crystalline minerals are highly active and exhibit both gelling and pozzolanic properties.

[0015] The present invention limits the components and content of the solid waste slag powder raw material. Through the interaction of active components in the solid waste slag powder, the gelling properties of the solid waste-based enhanced tile adhesive can be improved, providing a prerequisite for reducing the amount of traditional cement materials.

[0016] It should be noted that, in the present invention, the mass percentage of the stretching binder and the mass percentage of the solid waste residue powder raw material are based on their respective masses.

[0017] Further preferably, the preparation method of the polyacrylamide modified solid waste slag powder includes the following steps: weighing each component according to the designed ratio, grinding the polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash to obtain polyacrylamide modified solid waste slag powder.

[0018] In the present invention, the amide group of polyacrylamide is polar and can be adsorbed onto the particle surface through adsorption. This effectively balances the residual valence bonds and charges on the particle surface due to the breaking of chemical bonds during the pulverization process, thereby reducing the resulting powder agglomeration. In addition, polyacrylamide is a macromolecular polymer that adsorbs onto the particle surface, acting as a steric barrier, further reducing particle agglomeration and improving the dispersibility of the solid waste slag powder. At the same time, polyacrylamide adsorbs onto the particle surface to form an adhesive layer, which can improve the adhesion between the solid waste slag particles and the mill, making the grinding process more stable and improving the grinding accuracy and efficiency. The slag itself is highly active. Combined with the ball effect of fly ash, polyacrylamide can promote the hydration of the effective active components in the slag and accelerate the disintegration of the slag, silico-manganese smelting slag, and fly ash glass phase to create a better environment for the formation of hydration products. Fly ash microbeads also contain small-sized microbeads. Through grinding, the small-sized microbeads can be well filled between the steel slag, slag, and silico-manganese smelting slag powders, which can enhance the various tensile bond strength values ​​of the product.

[0019] Preferably, a grinding aid accounting for 0.03% to 0.05% of the mass of the polyacrylamide modified solid waste residue powder needs to be added during the grinding process.

[0020] Preferably, the specific surface area of ​​the polyacrylamide modified solid waste powder is 450 to 550 m 2 / kg.

[0021] Preferably, the cement is silicate cement with a quality grade of 52.5 or above, and the quality grade of the cement is certified by GB 175-2023 "General Purpose Portland Cement".

[0022] Preferably, the tailings powder is at least one of lead-zinc tailings powder or iron tailings powder, with a specific surface area of ​​450 to 550 m 2 / kg.

[0023] Preferably, the grade of the tailings fine powder is above grade I, and the 28d activity index is 73% to 80%. The grade of the tailings fine powder is determined by the standard T / CECS 10103-2020 "Lead, zinc and iron tailings fine powder used in cement and concrete".

[0024] Preferably, the graded tailings sand is metal tailings slag with a size of 18 to 200 meshes.

[0025] For example, the metal tailings are at least one of lead-zinc tailings or iron tailings.

[0026] Further preferably, the gradation composition of the metal tailings is: 18-50 mesh accounts for 20wt%-30wt%, 50-100 mesh accounts for 40wt%-50wt%, and 100-200 mesh accounts for 25wt%-35wt%.

[0027] By further limiting the grade and particle size of the above raw materials, the present invention can further exert the synergistic effect of the raw materials and better improve the comprehensive performance of the solid waste-based enhanced tile adhesive.

[0028] The present invention also provides a method for preparing the above-mentioned solid waste-based reinforced tile adhesive, comprising the following steps:

[0029] S1, weighing each component according to the designed ratio, mixing and grinding calcium carbonate powder, desulfurized gypsum powder, redispersible latex powder, cellulose ether and starch ether to obtain a stretching adhesive;

[0030] S2, uniformly mixing the stretch adhesive, polyacrylamide-modified solid waste residue powder, cement, tailings fine powder and tailings sand to obtain a solid waste-based reinforced tile adhesive.

[0031] The method for preparing a solid waste-based reinforced tile adhesive provided by the present invention utilizes a co-grinding process, which fully utilizes the self-grinding action of high-hardness particles, creating a micro-ball milling effect. This enhances the hydration activity of the solid waste-based reinforced tile adhesive while reducing grinding energy consumption. Furthermore, the method for preparing the solid waste-based reinforced tile adhesive provided by the present invention is simple and easy to implement, making it suitable for large-scale industrial production.

[0032] Preferably, in step S1 , a grinding aid accounting for 0.03% to 0.05% of the mass of the stretch adhesive needs to be added.

[0033] For example, the grinding aid is an xj-3 type high-efficiency composite cement grinding aid.

[0034] The present invention adds a certain amount of grinding aid during the mixing and grinding process of the powder, which can increase the specific surface area of ​​the powder (by more than 10%) and the output of the mill (by 8% to 10%). At the same time, the addition of the grinding aid can effectively improve the strength of the solid waste gelled material at various ages: the 3d compressive strength is increased by more than 20%, and the 28d compressive strength is increased by more than 10%. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example 1

[0037] This embodiment provides a solid waste-based reinforced tile adhesive, which is composed of the following raw materials in percentage by mass: a specific surface area of ​​550 m 2 / kg polyacrylamide modified solid waste powder 19%, 52.5 grade silicate cement 3%, specific surface area 540m 2 / kg of Class I iron tailings fine powder (28d activity index is 80%) 10%, 18-200 mesh graded iron tailings slag 55% and stretching binder 13%.

[0038] The tensile adhesive is composed of the following raw materials by weight: 35% calcium carbonate powder, 31% desulfurized gypsum powder, 28% redispersible latex powder, 4.5% cellulose ether, and 1.5% starch ether. The solid waste slag powder is composed of the following components by weight: 45% slag, 30% steel slag, 15% silicon-manganese smelting slag, and 10% fly ash.

[0039] The weight of polyacrylamide accounts for 0.4‰ of the solid waste slag powder raw material, and the molecular weight of polyacrylamide is 4 million Da. The gradation composition of the iron ore tailings slag is: 18-50 mesh accounts for 20wt%, 50-100 mesh accounts for 50wt%, and 100-200 mesh accounts for 30wt%.

[0040] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0041] S1, according to the designed proportion, weigh each component, grind polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash, and "Baoling" brand XJ-3 type high-efficiency composite cement grinding aid with a mass ratio of 0.04%, and obtain a specific surface area of ​​550m 2 / kg of polyacrylamide modified solid waste powder.

[0042] S2. Weigh each component according to the designed ratio, mix and grind calcium carbonate powder, desulfurized gypsum powder, redispersible latex powder, cellulose ether and starch ether, and 0.04% by mass of "Baoling" brand xj-3 type high-efficiency composite cement grinding aid to obtain a tensile adhesive.

[0043] S3. Weigh each component according to the designed ratio, and evenly mix the above-mentioned stretch adhesive, the above-mentioned polyacrylamide-modified solid waste slag powder, 52.5 grade Portland cement, Grade I iron tailings fine powder and graded iron tailings slag to obtain a solid waste-based reinforced tile adhesive.

[0044] It should be noted that there is no order between steps S1 and S2.

[0045] Example 2

[0046] This embodiment provides a solid waste-based reinforced tile adhesive, which is composed of the following raw materials in percentage by mass: a specific surface area of ​​520 m 2 / kg polyacrylamide modified solid waste powder 22%, 52.5 grade silicate cement 7%, specific surface area 510m 2 7% of / kg Class I iron tailings fine powder (28d activity index is 74%), 55% of 18-200 mesh graded lead-zinc tailings or iron tailings and 9% of stretching adhesive.

[0047] The tensile adhesive is composed of the following raw materials by weight: 32% calcium carbonate powder, 33% desulfurized gypsum powder, 30% redispersible latex powder, 4.5% cellulose ether, and 0.5% starch ether. The solid waste slag powder is composed of the following components by weight: 50% slag, 27% steel slag, 13% silicon-manganese smelting slag, and 10% fly ash.

[0048] The weight of polyacrylamide accounts for 0.5‰ of the solid waste slag powder raw material, and the molecular weight of polyacrylamide is 5 million Da. The gradation composition of the lead-zinc tailings or iron tailings is: 18-50 mesh accounts for 30wt%, 50-100 mesh accounts for 45wt%, and 100-200 mesh accounts for 25wt%.

[0049] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0050] S1, according to the designed proportion, weigh each component, grind polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash, and "Baoling" brand XJ-3 type high-efficiency composite cement grinding aid with a mass ratio of 0.03%, and obtain a specific surface area of ​​520m 2 / kg of polyacrylamide modified solid waste powder.

[0051] S2 to S3 are the same as those in Example 1 and will not be described in detail.

[0052] Example 3

[0053] This embodiment provides a solid waste-based reinforced tile adhesive, which is composed of the following raw materials in percentage by mass: a specific surface area of ​​480 m 2 / kg polyacrylamide modified solid waste powder 17%, 52.5 grade Portland cement 5%, specific surface area 485m 2 / kg of Class I lead-zinc tailings fine powder (28d activity index is 76%) 12%, 18-200 mesh graded lead-zinc tailings slag or iron tailings slag 58% and stretching adhesive 8%.

[0054] The tensile adhesive is composed of the following raw materials by weight: 33% calcium carbonate powder, 30% desulfurized gypsum powder, 32% redispersible latex powder, 3.5% cellulose ether, and 1.5% starch ether. The solid waste slag powder is composed of the following components by weight: 40% slag, 33% steel slag, 15% silicon-manganese smelting slag, and 12% fly ash.

[0055] The mass of polyacrylamide accounts for 0.3‰ of the solid waste slag powder raw material, and the molecular weight of polyacrylamide is 3 million Da. The gradation composition of the lead-zinc tailings slag is: 18-50 mesh accounts for 30wt%, 50-100 mesh accounts for 40wt%, and 100-200 mesh accounts for 30wt%.

[0056] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0057] S1, weigh each component according to the designed ratio, grind polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash, and obtain a specific surface area of ​​480m 2 / kg of polyacrylamide modified solid waste powder.

[0058] S2 is the same as in Example 1 and will not be described in detail.

[0059] S3. Weigh each component according to the designed ratio, and evenly mix the above-mentioned stretch adhesive, the above-mentioned polyacrylamide-modified solid waste slag powder, 52.5 grade Portland cement, Grade I lead-zinc tailings fine powder and graded lead-zinc tailings slag to obtain a solid waste-based reinforced tile adhesive.

[0060] Example 4

[0061] This embodiment provides a solid waste-based reinforced tile adhesive, which is composed of the following raw materials in percentage by mass: a specific surface area of ​​450m 2 / kg polyacrylamide modified solid waste powder 17%, 52.5 grade Portland cement 3%, specific surface area 455m 2 7% of / kg of Class I lead-zinc tailings fine powder (28d activity index is 73%), 65% of 18-200 mesh graded lead-zinc tailings slag or iron tailings slag and 8% of stretching adhesive.

[0062] The tensile adhesive is composed of the following raw materials by weight: 33% calcium carbonate powder, 30% desulfurized gypsum powder, 31% redispersible latex powder, 5% cellulose ether, and 1% starch ether. The solid waste slag powder is composed of the following components by weight: 46% slag, 29% steel slag, 17% silicon-manganese smelting slag, and 8% fly ash.

[0063] The mass of polyacrylamide accounts for 0.4‰ of the solid waste slag powder raw material, and the molecular weight of polyacrylamide is 6 million Da. The gradation composition of the lead-zinc tailings or iron tailings is: 18-50 mesh accounts for 25wt%, 50-100 mesh accounts for 40wt%, and 100-200 mesh accounts for 35wt%.

[0064] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0065] S1, weigh each component according to the designed ratio, grind polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash, and obtain a specific surface area of ​​450m 2 / kg of polyacrylamide modified solid waste powder.

[0066] S2 to S3 are the same as those in Example 3 and will not be described in detail.

[0067] Comparative Example 1

[0068] This comparative example provides a solid waste-based reinforced tile adhesive, which is similar to Example 1, except that the solid waste residue powder is not modified with polyacrylamide.

[0069] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0070] S1, according to the designed proportion, weigh each component, grind the water slag, steel slag, silicon manganese smelting slag powder and fly ash, and the "Baoling" brand XJ-3 type high-efficiency composite cement grinding aid with a mass ratio of 0.04%, and obtain a specific surface area of ​​550m 2 / kg of solid waste powder.

[0071] S2 is the same as in Example 1 and will not be described in detail.

[0072] S3. Weigh each component according to the designed ratio, and evenly mix the above-mentioned stretch adhesive, the above-mentioned solid waste slag powder, 52.5 grade Portland cement, Grade I iron tailings fine powder and graded iron tailings slag to obtain a solid waste-based reinforced tile adhesive.

[0073] Comparative Example 2

[0074] This comparative example provides a solid waste-based reinforced tile adhesive, which is similar to Example 1, except that in the polyacrylamide-modified solid waste residue powder, the polyacrylamide accounts for 1% of the mass of the solid waste residue powder.

[0075] The preparation method of the solid waste-based reinforced tile adhesive is the same as that in Example 1 and will not be repeated here.

[0076] Comparative Example 3

[0077] This comparative example provides a solid waste-based reinforced tile adhesive, which is similar to Example 1, except that the molecular weight of the polyacrylamide in the polyacrylamide-modified solid waste residue powder is 12 million Da.

[0078] The preparation method of the solid waste-based reinforced tile adhesive is the same as that in Example 1 and will not be repeated here.

[0079] Comparative Example 4

[0080] This comparative example provides a solid waste-based reinforced tile adhesive, which is similar to Example 1, except that no calcium carbonate powder is added to the stretching adhesive. The stretching adhesive is composed of the following raw materials in the following mass percentages: 48% desulfurized gypsum powder, 43% redispersible latex powder, 7% cellulose ether, and 2% starch ether.

[0081] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0082] S1 is the same as in Example 1 and will not be described in detail.

[0083] S2. Weigh each component according to the designed ratio, mix and grind the desulfurized gypsum powder, redispersible latex powder, cellulose ether and starch ether, and 0.04% by mass of "Baoling" brand xj-3 type high-efficiency composite cement grinding aid to obtain a tensile adhesive.

[0084] S3 is the same as in Example 1 and will not be described in detail.

[0085] Comparative Example 5

[0086] This comparative example provides a solid waste-based reinforced tile adhesive, which is similar to Example 1, except that calcium carbonate powder and desulfurized gypsum are not added to the stretching adhesive. The stretching adhesive is composed of the following raw materials in the following mass percentages: 82% redispersible latex powder, 13% cellulose ether, and 5% starch ether.

[0087] The preparation method of the solid waste-based reinforced tile adhesive comprises the following steps:

[0088] S1 is the same as in Example 1 and will not be described in detail.

[0089] S2. Weigh each component according to the designed ratio, mix and grind the redispersible latex powder, cellulose ether and starch ether, and 0.04% by mass of "Baoling" brand XJ-3 type high-efficiency composite cement grinding aid to obtain a stretching adhesive.

[0090] S3 is the same as in Example 1 and will not be described in detail.

[0091] Performance Testing

[0092] Several solid waste-based reinforced tile adhesives provided in the Examples and Comparative Examples were stirred with water until they formed a paste (powder-to-water ratio of 1:0.2). Performance tests were conducted according to the standard "Ceramic Tile Adhesives (JC / T 547-2017)." The results are shown in Table 1. As can be seen from Table 1, compared to Comparative Examples 1-5, the solid waste-based reinforced tile adhesives provided by the present invention (Examples 1-4) meet the requirements of C2TE-grade tile adhesives and exhibit excellent overall performance.

[0093] Table 1 Properties of solid waste-based reinforced tile adhesives in Examples and Comparative Examples

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solid waste-based enhanced tile adhesive, characterized in that: The raw material components include the following mass percentages: 17% to 22% of polyacrylamide modified solid waste slag powder, 3% to 7% of cement, 7% to 12% of tailings powder, 55% to 65% of graded tailings sand and 8% to 13% of stretching adhesive; Among them, the mass of polyacrylamide accounts for 0.3‰ to 0.5‰ of the solid waste slag powder raw material, and the molecular weight of the polyacrylamide is 3 million to 6 million Da; the stretching adhesive includes the following raw material components in percentage by mass: 32% to 35% calcium carbonate powder, 30% to 33% desulfurized gypsum powder, 28% to 32% redispersible latex powder, 3.5% to 5% cellulose ether and 0.5% to 1.5% starch ether.

2. The solid waste-based enhanced tile adhesive according to claim 1, characterized in that: The solid waste slag powder raw material comprises the following components in percentage by mass: 40% to 50% of water slag, 27% to 33% of steel slag, 13% to 17% of silicon-manganese smelting slag and 8% to 12% of fly ash.

3. The solid waste-based enhanced tile adhesive according to claim 2, characterized in that: The preparation method of the polyacrylamide modified solid waste slag powder comprises the following steps: The components are weighed according to the designed ratio, and the polyacrylamide, water slag, steel slag, silicon manganese smelting slag powder and fly ash are ground to obtain polyacrylamide modified solid waste slag powder.

4. The solid waste-based enhanced tile adhesive according to claim 3, characterized in that: During the grinding process, a grinding aid accounting for 0.03% to 0.05% of the mass of the polyacrylamide modified solid waste residue powder needs to be added; and / or The specific surface area of ​​the polyacrylamide modified solid waste slag powder is 450-550m 2 / kg.

5. The solid waste-based enhanced tile adhesive according to claim 1, characterized in that: The cement is silicate cement with a quality grade of 52.5 or above.

6. The solid waste-based enhanced tile adhesive according to claim 1, characterized in that: The tailings powder has a specific surface area of ​​450 to 550 m 2 / kg of at least one of lead-zinc tailings powder or iron tailings powder; the grade of the tailings powder is above grade I, and the 28d activity index is 73% to 80%.

7. The solid waste-based enhanced tile adhesive according to claim 1, characterized in that: The graded tailings sand is metal tailings slag with a mesh size of 18 to 200.

8. The solid waste-based enhanced tile adhesive according to claim 7, characterized in that: The gradation composition of the metal tailings is as follows: 18-50 mesh accounts for 20wt%-30wt%, 50-100 mesh accounts for 40wt%-50wt%, and 100-200 mesh accounts for 25wt%-35wt%.

9. The method for preparing the solid waste-based enhanced tile adhesive according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, weighing each component according to the designed ratio, mixing and grinding calcium carbonate powder, desulfurized gypsum powder, redispersible latex powder, cellulose ether and starch ether to obtain a stretching adhesive; S2, mixing the stretch adhesive, polyacrylamide modified solid waste slag powder, cement, tailings powder and tailings sand evenly to obtain a solid waste-based enhanced tile adhesive.

10. The method for preparing the solid waste-based enhanced tile adhesive according to claim 9, characterized in that: In step S1, a grinding aid accounting for 0.03% to 0.05% of the mass of the stretch adhesive needs to be added.

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