Preparation method of anti-erosion and wear-resistant plastic material suitable for garbage incinerator

Abstract

The invention discloses a preparation method of an anti-erosion and wear-resistant plastic refractory suitable for a garbage incinerator, relates to the field of plastic refractory, and aims to solve the problems of poor thermal shock resistance and corrosion resistance of plastic refractory in the prior art. The soaking speed can be increased by heating and adding the penetrant, the reacted granules are ground into powder, then silicon carbide and high-aluminum granules are added for modification, and the powder and the reacted liquid phase are mixed and subjected to wet grinding. According to the method, the raw material cost is reduced, meanwhile, sufficient dissolution and uniform reaction of effective substances are ensured, the prepared plastic refractory has higher thermal shock resistance, better oxidation resistance and corrosion resistance and more excellent mechanical property, a high-performance furnace lining material suitable for an extreme environment is constructed, the maintenance frequency of equipment is reduced, and the operation cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of incinerator lining materials technology, specifically a method for preparing an anti-erosion and wear-resistant plastic suitable for waste incinerators. Background Technology

[0002] Currently, the erosion-resistant refractory materials used in incinerator linings (such as high-alumina castables) have poor thermal shock resistance at high temperatures, and chemical corrosion during use can easily lead to a decrease in material strength. While some lining materials (plastics) are easy to install, they are not ideal in resisting special corrosive substances such as hydrogen chloride, sulfur oxides, and nitrogen oxides produced by waste incineration. These special corrosive substances can penetrate and dissolve the plastic matrix, causing the material to "powder" or "peel off".

[0003] In existing incinerator plastic preparation, the active ingredients are often directly mixed. This method can lead to problems such as excessively high local concentrations in the system, insufficient dissolution, and high viscosity of the resulting plastic. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this invention discloses a method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators. The technical solution includes the following steps:

[0006] Step 1: Mix the acid, water, humectant, aluminum material, zirconium material, magnesium material, and silicon material.

[0007] Among them, aluminum materials include high-alumina bauxite ore; zircon materials include zircon ore; magnesium materials include at least one of magnesium bricks or magnesium ore; and silicon materials include silicon ore.

[0008] Aluminum-based materials refer to natural mineral raw materials containing aluminum, specifically high-alumina bauxite. Their function is to provide a source of aluminum ions for colloidal systems. Zircon-based materials refer to natural mineral raw materials containing zircon, specifically zircon. Their function is to provide zirconium to enhance the high-temperature stability of plastics, preventing cracking of furnace linings due to high-temperature shrinkage or expansion. Zircon's main component... It is chemically inert, hardly reacts with acidic gases, and can effectively block the penetration of acidic media. Zirconium compounds can also effectively block the corrosion of alkali metals and heavy metals, significantly delay the formation and diffusion of eutectic, and zirconium can also improve the thermal shock resistance of furnace linings. Magnesium materials refer to natural mineral raw materials containing magnesium, which can be made from magnesium ore. Their role is to regulate the ion balance of colloidal systems. Silica materials refer to natural mineral raw materials containing silicon, which can be made from silicon ore. Their role is to form a silicon-oxygen network structure to improve bonding strength.

[0009] Phosphoric acid reacts chemically with solid minerals, promoting the dissolution and release of metal ions. Plastics can be prepared by soaking ores in phosphoric acid solution. This allows liquid raw materials to penetrate more quickly and extract oxides more thoroughly by utilizing the gaps in the ores themselves. The core function of the humectant is to maintain the moisture balance in the system during the uncured stage of the plastic, preventing excessive moisture loss or evaporation, thereby ensuring the smooth progress of construction and curing.

[0010] Step 2: After the reaction, filter and collect the liquid and particulate matter separately;

[0011] Oxides can be extracted from natural or minimally processed solid materials by soaking in acidic solutions, which allows for more moderate control of the release of active ingredients and results in a more uniform plastic system.

[0012] Step 3: Process the particulate matter collected in Step 2 into fine powder of 200-320 mesh as aggregate, and mix it with the additive aggregate and the liquid collected in Step 2 and wet grind it.

[0013] As a preferred embodiment of the present invention, the acid is an 85% phosphoric acid solution.

[0014] As a preferred embodiment of the present invention, it further includes alumina and chromium powder. Alumina is a supplement to the ore and can be used to react with phosphoric acid solution to form a stable complex structure and regulate the acid-base balance of the reaction system; chromium powder can be used to directly add chromium to the system.

[0015] As a preferred embodiment of the present invention, the humectant is oxalic acid; the additive aggregate includes silicon carbide aggregate and high-alumina aggregate.

[0016] During the operation of a waste incinerator, the high-speed airflow inside the furnace carries a large amount of hard fly ash particles (mainly containing...). , , (etc.), forming a continuous "sandblasting" scouring effect on the furnace wall plastics. Silicon carbide has a Mohs hardness of up to 9.2. As dispersed hard particles, it is evenly distributed in the material matrix, directly resisting the cutting and grinding of fly ash particles, reducing the wear of plastics during operation by more than 50%, while maintaining its hardness at high temperatures of 1000-1200℃. Silicon carbide is also extremely chemically inert, not reacting with air at room temperature to high temperatures. , , It reacts with acidic gases and is not dissolved by weak acids or bases, effectively preventing corrosive gases from penetrating into the material, thus improving its resistance to acid corrosion. Furthermore, the wetting angle between silicon carbide and slag is above 90 degrees, effectively preventing structural damage caused by molten material penetrating along the material's pores, thereby improving the material's resistance to molten material erosion. Silicon carbide has a low thermal conductivity (approximately...). The value is much higher than that of ordinary refractory materials (such as high-alumina bricks). This allows for rapid conduction and diffusion of heat that accumulates locally on the furnace wall, reducing the temperature gradient in "hot spot" areas and indirectly lowering the risk of thermal shock cracking; at the same time, it has a low coefficient of thermal expansion. It has good volume stability at high temperatures and is not prone to internal stress due to thermal expansion and contraction.

[0017] High-alumina particles can form a stable corundum phase at high temperatures. The high-alumina particles exhibit no crystalline transformation and are not easily softened at high temperatures, effectively resisting "high-temperature creep" and ensuring that the furnace wall structure does not collapse or deform over a long period of time; furthermore, the high-alumina particles have a coefficient of thermal expansion of approximately (approximately...). ) between silicon carbide ( ) and ordinary clay aggregate ( Between these, and the tiny pores inside the particles can absorb the internal stress generated by thermal expansion. Combined with its high thermal conductivity, it can effectively alleviate the impact of temperature fluctuations, increasing the "thermal shock resistance" (1100℃ water cooling cycle) of the plastic to more than 20 times.

[0018] The combined use of silicon carbide and high-alumina particles can block the penetration of molten material and acidic gases through silicon carbide, while the high-alumina particles buffer thermal stress through micropores, thus preventing the material from failing rapidly due to the combined effects of "erosion + thermal shock".

[0019] As a preferred embodiment of the present invention, in step 1, the raw materials are proportioned by weight as follows:

[0020] Liquid raw materials - base material: 6-8 parts of 85% phosphoric acid solution;

[0021] Liquid raw materials - additives: 0.1-0.3 parts of humectant.

[0022] Solid raw materials - granular materials: 6-8 parts of magnesium material with a magnesium content of 30%-40%, 3-5 parts of silicon ore with a silicon content of 99%, 3-5 parts of zircon ore with a zircon content of 60%, and 10-15 parts of high-alumina bauxite ore with an aluminum content of more than 70%.

[0023] Solid raw materials - supplementary materials: 0.2-0.3 parts chromium powder, 0.7-1 parts alumina;

[0024] Solid raw materials - additives: 10-20 parts of silicon carbide aggregate with a particle size of 0-1mm, and 40-50 parts of high-alumina aggregate with an aluminum content of 85% or more and a particle size of 1-8mm.

[0025] Phosphoric acid solution, acting as the reaction medium, first dissolves chromium powder and alumina to form an acidic complex. Subsequently, magnesium ions and silicate ions are gradually released from the magnesium material and silicate ore in the liquid phase. By controlling the liquid-solid ratio, the mineral particles are ensured to fully contact the reaction interface. The composite addition of high-alumina bauxite ore and alumina provides both an aluminum source and regulates the rheological properties of the system, forming a three-dimensional network through the copolymerization of aluminum-oxygen tetrahedra and silicon-oxygen tetrahedra.

[0026] High-alumina particles are coarse and form the skeleton, while silicon carbide particles are fine and fill the gaps in the skeleton, while also enhancing the surface density, making the plastic both dense (impermeable) and tough (impact resistant).

[0027] As a preferred embodiment of the present invention, in step 1, the reaction is stirred at a speed of 50-100 rpm for 30 days before proceeding to step 2.

[0028] As a preferred embodiment of the present invention, the specific steps of step 1 are as follows:

[0029] Step 11: Mix the acid, water, chromium powder, aluminum oxide, and humectant, and stir until well combined;

[0030] Step 12: Put the mixture obtained in step 11 into a heating tank, and then add magnesium material, silica ore, zircon ore and high-alumina bauxite ore into the heating tank.

[0031] Step 13: Heat the heating vessel to increase the reaction rate.

[0032] As a preferred embodiment of the present invention, in step 13, after heating to boiling, the mixture is kept for 30 minutes and then cooled for 48 hours.

[0033] In a preferred embodiment of the present invention, in step 1, water is added to control the ratio of the volume of the liquid to the volume of the solid at 4:1.

[0034] The liquid-to-solid ratio of 4:1 ensures that the solid particles are uniformly suspended in the liquid phase, avoiding incomplete reactions caused by excessively high local concentrations.

[0035] In a preferred embodiment of the present invention, step 11 further includes a penetrant and a coupling agent. The penetrant reduces the surface tension of the liquid, promotes the penetration of the gel-like liquid into the pores of the bonded materials, and enhances the interfacial bonding force; the coupling agent improves the bonding strength and enhances the stability of the system at high temperatures; the amounts of penetrant and coupling agent added by weight are as follows: penetrant 0.1-0.5 parts; coupling agent 0.01-0.05 parts, wherein the coupling agent is γ-aminopropylsilane.

[0036] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention uses a phosphoric acid solution to soak and react natural or pre-processed solid materials such as ores and lumps, reducing raw material costs while ensuring the full dissolution and uniform reaction of effective substances. The resulting plastic base material can form strong chemical bonds and physical adsorption with the bonded materials, exhibiting high bonding strength, good permeability, and good adhesion to the inner wall of the incinerator. The resulting plastic has low viscosity, making it less likely to adhere to the hands or tools of construction workers, and the construction process does not require formwork, facilitating construction. The addition of high-alumina particles can effectively improve the thermal expansion performance of the material, enhance thermal shock stability, and reduce the risk of cracking and peeling at high temperatures. By adding silicon carbide, the high temperature resistance and corrosion resistance of the plastic can be further improved, and the mechanical properties can be further enhanced. This creates a furnace lining material suitable for extremely complex working environments, possessing excellent resistance to high temperature erosion, thermal shock, erosion and wear, good plasticity, and high stability. By increasing the overall service life of the furnace lining material, the maintenance frequency of the equipment is reduced, operating costs are lowered, and the efficient and safe operation of the waste incinerator is ensured.

[0037] Furthermore, during the mixing reaction, heating first and then naturally cooling not only allows the materials to react fully, increases the reaction rate, and shortens the production cycle, but also gives the plastic a stable structure. When used in environments with changing temperatures, it can maintain good physical and chemical properties and is less prone to cracking, peeling, and other phenomena.

[0038] Furthermore, the preparation process of this invention has a clear operation flow and is simple to operate, requiring no complex and precision equipment, thus reducing equipment investment costs. The reasonable process parameter settings reduce energy consumption and improve production efficiency. Through precise control of each step, product quality differences caused by process fluctuations are reduced, effectively ensuring the consistency and stability of product quality. Attached Figure Description

[0039] Figure 1 This is a flowchart of the first implementation method;

[0040] Figure 2 This is a flowchart of the fourth implementation method;

[0041] Figure 3 This is a flowchart of the sixth implementation method;

[0042] Figure 4 This is a flowchart of the seventh implementation method. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1

[0045] like Figure 1 As shown, this embodiment discloses the first implementation of the present invention, and the technical solution adopted includes the following steps:

[0046] Step 1, weigh the raw materials according to the specified weight:

[0047] Raw material group A (granular material with a particle size of 1mm): 6 parts of magnesium brick particles with a magnesium content of 40%, 3 parts of high-purity quartz ore particles with a silicon content of 99%, 3 parts of zircon particles with a zircon content of 60%, and 10 parts of high-alumina bauxite ore particles with an aluminum content of more than 70%.

[0048] Raw material group B: 0.2 parts of 200-mesh chromium powder, 0.7 parts of 325-mesh alumina particles; 0.1 parts of oxalic acid (humectant);

[0049] Raw material group C: 6 parts of 85% phosphoric acid solution, 3 parts of deionized water;

[0050] Raw material group D: 10 parts of silicon carbide aggregate with a particle size of 1 mm and 40 parts of high alumina aggregate with a particle size of 8 mm and an aluminum content of 85% are mixed together;

[0051] Step 2: Add raw material group B and raw material group C to the stirring device and mix them at a high speed of 300 rpm to make the components evenly mixed and obtain a mixed slurry.

[0052] In this step, phosphoric acid solution, as the reaction medium, first dissolves chromium powder and alumina to form an acidic complex;

[0053] Step 3: Put the mixed slurry obtained in step 2 into the heating tank, and then put the raw material group A, which has been washed with clean water to remove external impurities, into the heating tank. At this time, the liquid volume in the heating tank is four times the volume of raw material group A.

[0054] In this step, magnesium brick particles and high-purity quartz ore particles gradually release magnesium ions and silicate ions in the liquid phase. By controlling the liquid-solid ratio, the mineral particles are fully in contact with the reaction interface. The composite addition of high-alumina bauxite ore and alumina not only provides an aluminum source but also adjusts the rheological properties of the system. A three-dimensional network is formed through the copolymerization of aluminum-oxygen tetrahedra and silicon-oxygen tetrahedra. The liquid-solid ratio of 4:1 ensures that the solid particles are uniformly suspended in the liquid phase, avoiding incomplete reaction caused by excessively high local concentrations. After the reaction is fully carried out, sufficient cementing substances can be generated.

[0055] Step 4: Heat the material in the heating tank using electric heating. After the liquid phase boils at 100°C, maintain the temperature at 100°C and react for 30 minutes. Then turn off the electric heating and allow the material to cool naturally for 24 hours to allow it to cool completely. This step can promote the uniform distribution and stabilization of the reaction products.

[0056] In this step, magnesium, silicon, zirconium, and high-alumina particles are used as the reaction substrate. In a liquid medium of 85% phosphoric acid and water, the surface of the ore is first corroded and dissolved, so that metal ions are gradually released into the liquid phase. In acidic environments, ions of aluminum, zirconium, magnesium, and silicon react to form soluble phosphates (such as magnesium phosphate, aluminum phosphate, and zirconium phosphate). These products, upon cooling, form an initial, cementing structure. Specifically, high-alumina bauxite serves as the aluminum source; the alumina in its natural minerals reacts with phosphoric acid to form aluminophosphate colloids, with undecomposed ore particles acting as a reaction buffer. Chromium powder gradually forms trivalent chromium ions in acidic environments, which combine with phosphate ions to form a stable three-dimensional network framework, subsequently forming a composite colloidal structure with aluminophosphate. Phosphoric acid reacts chemically with the Zr-O bonds on the zircon surface; the hydrogen ions released from the phosphate react with the Zr-O-Si bonds on the zircon surface to form -OH groups, enhancing surface hydrophilicity and improving compatibility with binders (such as phosphates and silicates). Phosphoric acid ions also form a stable Zr-OP bond with zircon ions on the zircon surface. The bonds form a nanoscale phosphate coating layer on the particle surface, significantly improving the mechanical interlocking and chemical anchoring ability between particles; the porous structure of the magnesia bricks promotes acid penetration, and magnesium participates in the formation of a magnesium-aluminum-chromium composite phosphate network; the silica in the silica ore partially dissolves under acidic conditions to form silica colloids, which together with metal phosphates construct a three-dimensional cross-linked system; the system stability is maintained by the charge interaction between ions, forming a composite colloidal structure, laying the foundation for the adhesive properties of plastics; the impurities associated with the natural ore can act as a buffer, slowing down the reaction rate and avoiding local supersaturation;

[0057] The composite phosphates and oxides formed by elements such as chromium, magnesium, silicon, zirconium, and aluminum in the system are not easily decomposed at high temperatures and can form stable crystal structures (such as chromaluminate and magnesium silicate) through interaction. They resist the corrosion of various gas atmospheres such as oxidation and reduction at high temperatures, avoid the destruction of the adhesive structure due to high temperature, and thus maintain the long-term adhesive effect.

[0058] Step 5: Filter the material cooled to room temperature using an 80-mesh filter at room temperature and pressure to obtain filtrate and particulate residue.

[0059] Step 6: After draining the granular residue until no liquid drips, dry it in a dryer at 110°C until constant weight.

[0060] Step 7: Process the dried granular residue obtained in Step 6 into 320-mesh fine powder, and test it to find that the chromium content is 1.9%, the aluminum content is 55%, the magnesium content is 30%, the silicon content is 7%, and the zirconium content is 15%.

[0061] Step 8: Mix raw material group D, the fine powder obtained in step 7, and the filtrate obtained in step 5 at a mass ratio of 43:50:7, and then grind them in a wet mill for 10 minutes before removing them from the pan to obtain the product.

[0062] Step 9: Seal the package and put it into storage.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 is that:

[0065] Step 1, weigh the raw materials according to the specified weight:

[0066] Raw material group A (granular material with a particle size of 8mm): 8 parts of magnesium brick particles with a magnesium content of 40%, 5 parts of high-purity quartz ore particles with a silicon content of 99%, 5 parts of zircon particles with a zircon content of 60%, and 15 parts of high-alumina bauxite ore particles with an aluminum content of more than 70%.

[0067] Raw material group B: 0.3 parts of 200 mesh chromium powder, 1 part of 325 mesh alumina particles; 0.3 parts of oxalic acid (humectant);

[0068] Raw material group C: 6 parts of 85% phosphoric acid solution, 4 parts of deionized water;

[0069] Raw material group D: 20 parts of silicon carbide aggregate with a particle size of 0.5 mm and 50 parts of high alumina aggregate with a particle size of 4 mm and an aluminum content of 85% are mixed together;

[0070] Step 7: Process the dried granular residue obtained in Step 6 into 250-mesh fine powder, and test it to find that the chromium content is 3%, the aluminum content is 65%, the magnesium content is 40%, the silicon content is 15%, and the zirconium content is 18%.

[0071] Step 8: Mix raw material group D, the fine powder obtained in step 7, and the filtrate obtained in step 5 at a mass ratio of 6:3:1, and then grind them in a wet mill for 12 minutes before removing them from the pan to obtain the product.

[0072] Example 3

[0073] The difference between this embodiment and Embodiment 1 is that:

[0074] Step 1, weigh the raw materials according to the specified weight:

[0075] Raw material group A (granular material with a particle size of 5mm): 7 parts of magnesium brick particles with a magnesium content of 40%, 4 parts of high-purity quartz ore particles with a silicon content of 99%, 4 parts of zircon particles with a zircon content of 60%, and 12 parts of high-alumina bauxite ore particles with an aluminum content of more than 70%.

[0076] Raw material group B: 0.25 parts of 200-mesh chromium powder, 0.8 parts of 325-mesh alumina particles; 0.2 parts of oxalic acid (humectant);

[0077] Raw material group C: 7 parts of 85% phosphoric acid solution, 3 parts of deionized water;

[0078] Raw material group D: 15 parts of silicon carbide aggregate with a particle size of 0.1 mm and 45 parts of high alumina aggregate with a particle size of 1 mm and an aluminum content of 85% are mixed together;

[0079] Step 7: Process the dried granular residue obtained in Step 6 into 200-mesh fine powder, and test it to find that the chromium content is 2.6%, the aluminum content is 63%, the magnesium content is 35%, the silicon content is 17%, and the zirconium content is 16%.

[0080] Step 8: Mix raw material group D, the fine powder obtained in step 7, and the filtrate obtained in step 5 at a mass ratio of 50:35:8, and then grind them in a wet mill for 11 minutes before removing them from the pan to obtain the product.

[0081] Example 4

[0082] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that:

[0083] Raw material group C: 6 parts of 85% phosphoric acid solution, 3 parts of deionized water, 0.1 parts of penetrant, and 0.01 parts of γ-aminopropylsilane (coupling agent).

[0084] Penetrants are chemical substances that can reduce the surface tension of a liquid to promote its penetration into the interior of a solid. They accelerate the contact reaction between the solid raw material surface and the liquid phase by enhancing the wettability of acidic solutions on ore particles.

[0085] γ-aminopropylsilane, as a coupling agent, binds to the inorganic material (the substrate to be bonded) and the colloidal component at both ends of its molecule, respectively. Through the reaction of the active groups in its molecule with the hydroxyl groups on the surface of the inorganic particles, an organic coating layer is formed, which inhibits particle aggregation and enhances dispersion stability, keeping the reaction system in a uniform state. It also improves the bonding strength through chemical bond bridging and improves the stability of the system at high temperatures.

[0086] Example 5

[0087] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that:

[0088] Step 3: Put the mixed slurry obtained in step 2 into a sealed mixing tank, and then put raw material group A, which has been washed with clean water to remove external impurities, into the sealed mixing tank. At this time, the liquid volume in the sealed mixing tank is four times the volume of raw material group A.

[0089] Step 4: Stir at room temperature and react for 30 days, then proceed to Step 5.

[0090] Example 6

[0091] like Figure 4 As shown, the difference between this embodiment and Embodiment 5 is that:

[0092] Raw material group C: 6 parts of 85% phosphoric acid solution, 3 parts of deionized water, 0.5 parts of penetrant, and 0.05 parts of γ-aminopropylsilane (coupling agent).

[0093] Example 1 was compared with the comparative example in terms of thermal shock resistance, long-term heat resistance temperature, chemical corrosion resistance, and viscosity.

[0094] The thermal shock resistance test was conducted in accordance with GB / T 30873-2014 "Test Method for Thermal Shock Resistance of Refractory Materials".

[0095] Comparative Example 1: Corrosion-resistant and wear-resistant silicon carbide plastic for incinerator lining and its preparation method disclosed in Chinese Patent CN116041086A;

[0096] Comparative Example 2: A compostable plastic for incinerators and its preparation method disclosed in Chinese Patent CN116003145A;

[0097] Comparative Example 3: The difference between this comparative example and Example 1 is that the adhesive is prepared by directly adding the active ingredients to each component (without using ore soaking).

[0098]

[0099] The above comparison shows that Comparative Examples 1-2 of this application have superior thermal shock resistance, higher long-term heat resistance temperature, and higher chemical corrosion resistance. They can maintain stable performance and higher bonding strength during long-term thermal cycling. The comparison between Example 1 and Comparative Example 3 shows that ore soaking can reduce the viscosity of plastics compared to directly adding active ingredients, preventing them from sticking too firmly to construction tools or hands, thus making it easier to transfer plastics to the construction surface during construction.

[0100] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an erosion-resistant and wear-resistant plastic suitable for waste incinerators, characterized in that, Includes the following steps: Step 1: Mix the acid, water, humectant, aluminum material, zirconium material, magnesium material, and silicon material. Among them, aluminum materials include high-alumina bauxite ore; zircon materials include zircon ore; magnesia materials include at least one of magnesia bricks or magnesia ore; and silica materials include silica ore. Step 2: After the reaction, filter and collect the liquid and particulate matter separately; Step 3: Use the particulate matter collected in Step 2 as aggregate, mix it with the additive aggregate and the liquid collected in Step 2, and then wet-mill it.

2. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 1, characterized in that: The acid is an 85% phosphoric acid solution.

3. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 2, characterized in that: It also includes alumina and chromium powder.

4. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 3, characterized in that: The humectant is oxalic acid; the aggregate additives include silicon carbide aggregate and high-alumina aggregate.

5. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 4, characterized in that, In step 1, the raw materials are proportioned by weight as follows: Liquid raw materials - base materials: 6-8 parts of 85% phosphoric acid solution; Liquid raw materials - additives: 0.1-0.3 parts of humectant. Solid raw materials - granular materials: 6-8 parts of magnesium material with a magnesium content of 30%-40%, 3-5 parts of silicon ore with a silicon content of 99%, 3-5 parts of zircon ore with a zircon content of 60%, and 10-15 parts of high-alumina bauxite ore with an aluminum content of more than 70%. Solid raw materials - supplementary materials: 0.2-0.3 parts chromium powder, 0.7-1 parts alumina; Solid raw materials - additives: 10-20 parts of silicon carbide aggregate and 40-50 parts of high-alumina aggregate with an aluminum content of 85% or more.

6. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 3 or 4, characterized in that: In step 1, the reaction is stirred at 50-100 rpm for 30 days before proceeding to step 2.

7. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 3 or 4, characterized in that, The specific steps of step 1 are as follows: Step 11: Mix the acid, water, chromium powder, aluminum oxide, and humectant, and stir until well combined; Step 12: Put the mixture obtained in step 11 into a heating tank, and then add magnesium material, silica ore, zircon ore and high-alumina bauxite ore into the heating tank. Step 13: Heat the heating vessel to increase the reaction rate.

8. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 7, characterized in that: In step 13, after heating to boiling, maintain for 30 minutes, and then cool.

9. The method for preparing erosion-resistant and wear-resistant plastic suitable for waste incinerators according to claim 1, characterized in that: In step 1, water is added to control the ratio of the volume of the liquid to the volume of the solid at 4:1.

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