Preparation method of high-temperature-resistant anti-erosion chromium melt paint

Abstract

The invention discloses a preparation method of high-temperature-resistant anti-erosion chromium melt paint, relates to the field of chromium melt paint, and aims to solve the problems of poor viscosity, flowability and permeability of inorganic paint in the prior art. The technical scheme is as follows: aluminum, chromium, magnesium and silicon ore materials or processing materials are soaked in a phosphoric acid solution and water; according to the preparation method, a reaction is carried out gently and mildly, the soaking speed can be increased by heating and adding a penetrant, the bonding strength of the chromium melt paint is improved by adding a coupling agent, and then modification is carried out by adding nano micro powder. According to the method, the raw material cost is reduced, meanwhile, sufficient dissolution and uniform reaction of effective substances are ensured, the prepared chromium melt paint has high bonding strength, and due to the fact that the chromium melt paint does not contain organic volatile substances, the chromium melt paint has the advantages of being low in raw material cost, sufficient in reaction and good in environmental protection property, and the prepared chromium melt paint is low in viscosity and good in flowability and permeability.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chrome melting paint, in particular to a preparation method of high-temperature-resistant and erosion-resistant chrome melting paint. BACKGROUND

[0002] In the high-temperature production link of modern industry, the equipment is long-term in the harsh working conditions of high temperature, strong corrosion and high mechanical stress, and the protection ability of the equipment is required to be high. The existing nano-composite refractory material often has problems of uneven dispersion of raw materials, agglomeration of nano particles and complex process, resulting in unstable product performance, high production cost and limited large-scale application of the nano-composite refractory material.

[0003] The existing inorganic paint is not only high in cost but also acidic, and when the inorganic paint is brushed on the iron attachment surface, corrosion is formed on the attachment surface, cracks and peeling are caused on the attachment surface, and then the paint surface is peeled off. In the preparation process of the existing inorganic paint, the high-purity raw materials are directly mixed, such as the environment-friendly nano-modified inorganic paint with high temperature resistance and the preparation method disclosed in Chinese patent CN102351497B, which adopts the method of mixing liquid potassium silicate, aluminum tripolyphosphate, aluminum oxide, nano metal powder and Zn powder, and then adjusting the viscosity by using distilled water.

[0004] Chinese patent CN119101381A discloses a modified chromium aluminum phosphate coating, which adopts the method of dissolving and in water, and then adding aluminum oxide powder and stirring to obtain;

[0005] This method has obvious technical defects: high-purity raw materials are used, the reaction speed is too fast, the high purity causes the reaction to be more violent, the dissolution reaction between the raw materials is not sufficient, and the local supersaturation state is easily formed, the viscosity of the prepared coating is too large, the flowability and permeability are not good, and the construction performance and adhesion effect are affected. If organic raw materials are used, irritating and harmful gases will be released in a high-temperature environment, polluting the environment and endangering the physical and mental health of workers. SUMMARY

[0006] The technical problem to be solved by the application is to overcome the existing defects and provide a preparation method of high-temperature-resistant and erosion-resistant chrome melting paint, which can effectively solve the problems in the background.

[0007] In order to achieve the above purpose, the application discloses a preparation method of high-temperature-resistant and erosion-resistant chrome melting paint, which adopts the technical scheme of comprising the following steps:

[0008] Step 1, mixing acid, water, aluminum material, chromium material, magnesium material and silicon material;

[0009] The aluminum material includes high-aluminum bauxite ore; the chromium material includes chromium ore; the magnesium material includes at least one of magnesium brick or magnesium ore; and the silicon material includes silicon ore. The phosphoric acid reacts with the solid mineral to promote the dissolution of metal ions, and the chromium melting paint is prepared by soaking the ore in the phosphoric acid solution, which can use the existing gaps in the ore to make the liquid raw material penetrate more quickly and extract the oxide more completely.

[0010] Step 2: After the reaction, filtering is performed to collect the liquid.

[0011] The oxide is extracted from the natural or primary processed solid material by soaking in the acidic solution, which can more gently control the release of the effective component, so that the obtained chromium melting paint system is more uniform.

[0012] The aluminum material refers to a natural mineral raw material containing aluminum elements, and specifically, high-aluminum bauxite can be used to achieve the aluminum material, which provides aluminum ion sources for the colloidal system. The chromium material refers to a natural mineral raw material containing chromium elements, and specifically, chromium ore can be used to achieve the chromium material, which provides chromium elements to enhance the high-temperature resistance of the chromium melting paint. The magnesium material refers to a natural mineral raw material containing magnesium elements, and specifically, magnesium ore can be used to achieve the magnesium material, which adjusts the ion balance of the colloidal system. The silicon material refers to a natural mineral raw material containing silicon elements, and specifically, silicon ore can be used to achieve the silicon material, which forms a silicon-oxygen network structure to improve the bonding strength.

[0013] Step 3: Nano powder is added to the liquid collected in step 2, and after secondary boiling, the liquid is cooled to obtain the chromium melting paint. The nano powder can improve the mechanical properties and bonding force of the paint film.

[0014] As a preferred technical solution of the present application, the acid is a 85% phosphoric acid solution.

[0015] As a preferred technical solution of the present application, the chromium ore is low-grade chromium ore. The use of low-grade chromium ore can reduce the cost of raw materials.

[0016] As a preferred technical solution of the present application, it further includes aluminum oxide and chromium powder. The aluminum oxide and chromium powder are supplements in addition to the ore, the aluminum oxide can be used to react with the phosphoric acid solution to generate a stable complex structure, and the acid-base balance of the reaction system is adjusted; the chromium powder can be used to make up for the deficiency of effective components in the low-grade chromium ore.

[0017] As a preferred technical solution of the present application, the nano powder includes nano zirconia corundum, active nano alumina powder, and nano chromium green.

[0018] The zirconia corundum has a high refractoriness of 1700℃ or higher, and has a low thermal expansion coefficient (about 6.5×10 -6The zircon corundum can significantly improve the stability of the coating at high temperature, prevent cracking or peeling caused by sudden temperature change, and resist the penetration of molten metal or corrosive medium, so as to avoid the coating from being washed or dissolved by liquid substances.

[0019] The active alumina can form an alumina phosphate network with the phosphate to improve the bonding strength of the coating to more than 35 MPa, and the alumina can form a dense oxide film at high temperature to prevent the penetration of oxygen and corrosive gas; the nano-sized particles (particle size 50-200 nm) can fill the pores of the coating to reduce the porosity to less than 3.5%, and at the same time, the heat conductivity is reduced through the scattering effect, and the heat insulation performance is enhanced.

[0020] The melting point of chromium green is as high as 2435 DEG C, and a stable oxide film is formed at high temperature, which can inhibit the oxidation reaction of the coating; and the chromium green has excellent chemical inertness to acid, alkali and molten salt, and in the phosphate-based coating, the chromium green and the trivalent chromium salt cooperatively form a passivation layer, so that the salt spray corrosion time of the coating is prolonged to more than 1000 hours; the nano-sized chromium green can also optimize the infrared radiation performance of the coating through the scattering effect.

[0021] After the three materials are mixed, in terms of high temperature stability, the zircon corundum provides thermal shock resistance, the active alumina enhances oxidation resistance, and the chromium green enhances corrosion resistance, and the three together build a triple protection system of “high temperature resistance-oxidation resistance-corrosion resistance”, which can prolong the life of the coating in a high temperature environment of 1000 DEG C to twice that of the traditional coating, and the life prolonging amount is greater for a high temperature environment below 1000 DEG C; in terms of mechanical properties, the high hardness (9.0 Mohs) of the zircon corundum and the toughness (fracture toughness ) of the alumina can reduce the brittleness of the coating, and the fine grain strengthening effect (grain size <200 nm) of the chromium green can further improve the wear resistance;

[0022] The three materials are all nano-sized particles, which can improve the leveling property and construction performance of the coating, and avoid the problem of easy settlement of traditional micron-sized fillers.

[0023] As a preferred technical solution of the present application, in step 1, the raw materials are proportioned as follows by weight:

[0024] Liquid raw materials: 85% phosphoric acid solution 6-8 parts;

[0025] Solid raw materials: magnesium-containing material with magnesium content of 30%-40% 6-8 parts, silicon ore with silicon content of 99% 3-5 parts, low-grade chromium ore with chromium content of 8% 3-5 parts, chromium powder 0.2-0.3 parts, high-aluminum bauxite with aluminum content of more than 70% 10-15 parts, and alumina 0.7-1 part;

[0026] The liquid raw material volume and solid raw material volume ratio is controlled at 4:1 by adding water;

[0027] In step 3, the components of the nano-powder are mixed in the following proportions by weight:

[0028] 3-6 parts of nano-sized zirconia corundum, 4-8 parts of active nano-sized alumina powder, and 2-3 parts of nano-sized chromium green.

[0029] The phosphoric acid solution is used as a reaction medium to first dissolve the chromium powder and the alumina to form an acidic complex, and then the magnesium material and the silicon ore gradually release magnesium ions and silicate ions in the liquid phase, and the liquid-solid ratio is controlled to allow the mineral particles to fully contact the reaction interface. The combination of low-grade chromium ore and chromium powder utilizes the redox characteristics of chromium ions in different valence states to form a multi-core hydroxyl bridging structure under acidic conditions. The addition of high-alumina bauxite ore and alumina not only provides an aluminum source but also adjusts the rheological properties of the system, and a three-dimensional network is formed through the copolymerization of aluminum oxide tetrahedra and silicon oxide tetrahedra. The setting of the liquid-solid ratio of 4:1 allows the solid particles to be uniformly suspended in the liquid phase, avoiding incomplete reaction caused by excessive local concentration.

[0030] As a preferred technical solution of the present application, in step 1, the reaction is stirred at a speed of 50-100 rpm for 30 days, and step 2 is performed.

[0031] As a preferred technical solution of the present application, the specific steps of step 1 are as follows: step 11, mix the acid, water, chromium powder, and alumina, and stir until uniform; step 12, pour the mixture prepared in step 11 into a heating tank, and then add the magnesium material, silicon ore, chromium ore, and high-alumina bauxite ore into the heating tank; step 13, heat the heating tank to increase the reaction speed.

[0032] As a preferred technical solution of the present application, in step 13, after boiling, the heating reaction is maintained for 30 minutes, and then the system is cooled.

[0033] As a preferred technical solution of the present application, in step 11, a penetrating agent and a coupling agent are also mixed in. The penetrating agent can reduce the surface tension of the liquid, promote the penetration of the colloidal liquid into the pores of the adherend material, and enhance the interfacial bonding strength; the coupling agent can improve the adhesion strength and also improve the stability of the system at high temperatures; the input amounts of the penetrating agent and the coupling agent are as follows: 0.1-0.5 parts of the penetrating agent, and 0.01-0.05 parts of the coupling agent, and the coupling agent is γ-aminopropylsilane.

[0034] Compared with the prior art, the present application has the advantages that: the present application uses phosphoric acid solution to soak and react with natural or primary processed solid materials such as ore materials and blocks, which can ensure sufficient dissolution of effective substances and uniform reaction while reducing the cost of raw materials, and the prepared chromium melting paint base can form firm chemical bonds and physical adsorption with the adhered materials, has high bonding strength, and does not release polluting gases in high-temperature environments due to the absence of organic volatile substances, has the advantages of low raw material cost, sufficient reaction, and good environmental protection, and the prepared chromium melting paint has low viscosity, good flowability, and good permeability. By adding nano micro-powder, the high-temperature resistance, oxidation resistance, and corrosion resistance of the chromium melting paint surface can be further improved, and the mechanical properties can be further strengthened, thereby constructing a high-performance protective paint surface suitable for extreme environments and meeting the demand of long service life and high reliability of the coating in the industrial field.

[0035] Further, the solid material and the liquid material can form a high-temperature-resistant structure, so that the chromium melting paint will not decompose, soften, or lose adhesion ability when used for a long time in a high-temperature environment; and the addition of components such as chromium powder, aluminum oxide, and gamma-aminopropyl silane can make the chromium melting paint have good corrosion resistance, so that it can still maintain good performance in a high-temperature environment containing corrosive gases and prolong the service life.

[0036] Further, during the mixing reaction process, first heating and then natural cooling can not only make the materials fully react, improve the reaction speed, and shorten the production cycle, but also make the chromium melting paint have a stable structure, so that it can maintain good physical and chemical properties in a temperature-varying environment and is not prone to cracking, peeling, and other phenomena. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The method flowchart of the first embodiment;

[0038] Figure 2 The method flowchart of the fourth embodiment;

[0039] Figure 3 The method flowchart of the fifth embodiment;

[0040] Figure 4 The method flowchart of the sixth embodiment;

[0041] Figure 5 The method flowchart of the seventh embodiment. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0043] Embodiment 1

[0044] As shown in the figure, the present embodiment discloses the first implementation of the present application, and the technical solution is as follows: Figure 1

[0045] Step 1, the raw materials are weighed by weight parts:

[0046] Solid raw materials-particle materials (particle size 1 mm): 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 low-grade chromium ore particles with a chromium content of 8%, and 10 parts of high-aluminum bauxite ore particles with an aluminum content of more than 70%;

[0047] Solid raw materials-supplementary materials: 0.2 parts of chromium powder with a particle size of 800, and 0.7 parts of alumina with a particle size of 325;

[0048] Liquid raw materials: 6 parts of 85% phosphoric acid solution, 2 parts of deionized water, 0.1 part of penetrant, and 0.01 part of γ-aminopropylsilane;

[0049] 1 μm particle size nano powder: 3 parts of nano zirconia corundum, 4 parts of active nano alumina powder, and 2 parts of nano chromium green; the nano powder is mixed uniformly and then sealed for storage;

[0050] Step 2, the 85% phosphoric acid solution, deionized water, chromium powder, alumina, penetrant and γ-aminopropylsilane are added to a stirring device for high-speed stirring at a speed of 300 rpm to mix the components uniformly to obtain a mixed slurry;

[0051] In this step, the phosphoric acid solution is used as a reaction medium to first dissolve the chromium powder and alumina to form an acidic complex;

[0052] Step 3, the mixed slurry obtained in step 2 is put into a heating tank, and the magnesium brick particles, high-purity quartz ore particles, low-grade chromium ore particles, and high-aluminum bauxite ore particles washed with clean water to remove external impurities are put into the heating tank. At this time, the liquid capacity in the heating tank is four times the solid raw material capacity;

[0053] ​In this step, magnesium brick particles and high-purity quartz ore particles gradually release magnesium ions and silicate ions in the liquid phase, and by controlling the liquid-solid ratio, the mineral particles are fully contacted with the reaction interface; the combination of low-grade chromium ore and chromium powder utilizes the redox characteristics of different valence chromium ions to form a multi-core hydroxyl bridging structure under acidic conditions; the combination of high-aluminum bauxite and aluminum oxide not only provides an aluminum source but also adjusts the rheological properties of the system, and a three-dimensional network is formed through the copolymerization of aluminum oxide tetrahedra and silicon oxide tetrahedra; the setting of a liquid-solid ratio of 4:1 allows the solid particles to be uniformly suspended in the liquid phase, avoiding incomplete reaction caused by excessive local concentration;

[0054] Step 4, the material in the heating tank is heated using electric heating. After heating to 105°C and entering the boiling state, the heating temperature is continuously maintained at 105°C. After 30 minutes of reaction, the electric heating is turned off, and then the material is naturally cooled for 48 hours to allow the material to fully react.

[0055] In this step, magnesium, silicon, zirconium, and high-aluminum particles are used as reaction substrates in a liquid medium of 85% phosphoric acid and water. First, the surface of the ore is corroded and dissolved to gradually release metal ions into the liquid phase. In the acidic environment, ions of aluminum, chromium, magnesium, and silicon react to form soluble phosphates (such as magnesium phosphate, aluminum phosphate, chromium phosphate, etc.). These products form an initial structure with cementing properties after cooling. Specifically, high-aluminum bauxite serves as an aluminum source, and the aluminum oxide in its natural minerals reacts with phosphoric acid to form aluminum phosphate colloid. Undecomposed ore particles act as a reaction buffer medium. In the acidic environment, chromium minerals in the chromium ore gradually release trivalent chromium ions, which combine with phosphate ions to form a stable three-dimensional network framework, and further form a composite colloid structure with aluminum phosphate. The porous structure of magnesium bricks promotes acid penetration, and magnesium elements participate in the formation of magnesium-aluminum-chromium composite phosphate networks. Silicon dioxide in silicon ore partially dissolves under acidic conditions to form silicic acid colloid, which, together with metal phosphates, constructs a three-dimensional crosslinked system. The stability of the system is maintained through the charge interaction between ions, forming a composite colloid structure, which lays the foundation for the adhesion properties of chromium paint. Impurities associated with natural ores can act as a buffer to slow down the reaction rate and avoid local supersaturation.

[0056] Penetrating agents are chemical substances that can reduce the surface tension of liquids to promote their penetration into the interior of solids. They enhance the wettability of acidic solutions on ore particles, accelerating the contact reaction between the surface of solid raw materials and the liquid phase.

[0057] As a coupling agent, γ-aminopropylsilane has two ends of its molecule combined with inorganic materials (the adhered substrate) and colloidal components, respectively. Through the reaction of active groups in its molecule with the hydroxyl groups on the surface of inorganic particles, an organic coating layer is formed, which inhibits particle aggregation and enhances dispersion stability, allowing the reaction system to remain in a uniform state. The chemical bond bridging effect improves the adhesion strength and the stability of the system at high temperatures.

[0058] The complex phosphates and oxides of elements such as chromium, magnesium, silicon, aluminum, etc. in the system are not easy to decompose in high-temperature environment, and can form stable crystal structures (such as chromic aluminate, magnesium silicate, etc.) through interaction, resist oxidation, reduction and other gas atmosphere corrosion under high temperature, avoid the destruction of adhesive structure caused by high temperature, and thus maintain long-term adhesive effect;

[0059] Step 5: The material cooled to room temperature is filtered at room temperature and normal pressure with an 80-mesh filter screen to obtain a filtrate and a granular residue;

[0060] Step 6: The nanometer powder is added to the filtrate obtained in step 5, heated to 80°C in a mixing and stirring device, stirred at a speed of 50 rpm for 5 min, and naturally cooled to room temperature to obtain the product.

[0061] Step 7: Sealed packaging and storage.

[0062] The specific ratio of liquid to solid particles (4:1) ensures that the reaction proceeds sufficiently to generate sufficient cementitious material; heating at 105°C and natural cooling for 48 hours promote the uniform distribution and stabilization of the reaction products; subsequent addition of additives and stirring at 80°C allows the penetrating agent and coupling agent to be fully dispersed, further optimizing the interfacial activity and adhesive properties of the colloidal liquid, and ultimately forming a chromium melting paint with strong adhesion and high-temperature corrosion resistance.

[0063] Example 2

[0064] The difference between this example and Example 1 is:

[0065] Step 1: Weigh the raw materials according to the weight parts:

[0066] Solid raw materials - granular materials (particle size 8 mm): 7 parts of magnesium brick particles containing 35% magnesium, 4 parts of high-purity quartz ore particles containing 99% silicon, 4 parts of low-grade chromium ore particles containing 8% chromium, and 12 parts of high-aluminum bauxite ore particles containing more than 70% aluminum;

[0067] Solid raw materials - supplementary materials: 0.25 parts of chromium powder with a particle size of 800 mesh, and 0.8 parts of aluminum oxide with a particle size of 325 mesh;

[0068] Liquid raw materials: 7 parts of 85% phosphoric acid solution, 3 parts of deionized water, 0.3 parts of penetrating agent, and 0.03 parts of γ-aminopropylsilane;

[0069] Nanometer powder: 4.5 parts of nanometer zirconia corundum, 6 parts of active nanometer aluminum oxide powder, and 2.5 parts of nanometer chromium green; the nanometer powder is mixed uniformly and sealed for storage.

[0070] Example 3

[0071] The difference between this example and Example 1 is:

[0072] Step 1, the raw materials are weighed by weight parts:

[0073] Solid raw materials-particle materials (particle size 5mm): 8 parts of magnesium brick particles with magnesium content of 30%, 5 parts of high-purity quartz ore particles with silicon content of 99%, 5 parts of low-grade chromium ore particles with chromium content of 8%, and 15 parts of high-aluminum bauxite ore particles with aluminum content of more than 70%;

[0074] Solid raw materials-supplementary materials: 0.3 parts of chromium powder of 800 mesh, and 1 part of alumina of 325 mesh;

[0075] Liquid raw materials: 8 parts of 85% phosphoric acid solution, 4 parts of deionized water, 0.5 parts of penetrant, and 0.05 parts of γ-aminopropylsilane;

[0076] Nanometer powder: 6 parts of nanometer zirconia corundum, 8 parts of active nanometer alumina powder, and 3 parts of nanometer chromium green; the nanometer powder is uniformly mixed and sealed for standby.

[0077] Example 4

[0078] As shown in Figure 2 , the difference between this embodiment and example 1 is that:

[0079] The liquid raw materials used are only 85% phosphoric acid solution and deionized water.

[0080] Example 5

[0081] As shown in Figure 3 , the difference between this embodiment and example 1 is that:

[0082] The solid raw materials used include, by weight parts:

[0083] Particle materials: 6 parts of magnesium brick particles with magnesium content of 40%, 3 parts of high-purity quartz ore particles with silicon content of 99%, 3 parts of chromite ore particles with chromium content of 30%, and 10 parts of calcined bauxite ore particles with aluminum content of more than 80%.

[0084] By using chromium ore with a higher chromium content, there is no need to add chromium powder as an additional chromium supplement. Similarly, by using calcined bauxite with a higher aluminum content, there is no need to add additional alumina supplement, but this method has a higher cost.

[0085] Example 6

[0086] As shown in Figure 4 , this embodiment discloses the sixth embodiment of the application, and the technical scheme adopted is as follows:

[0087] Step 1, the raw materials are weighed by weight parts:

[0088] Solid raw materials - granules: 6 parts of magnesium brick granules with 40% magnesium content, 3 parts of high-purity quartz ore granules with 99% silicon content, 3 parts of low-grade chromium ore granules with 8% chromium content, and 10 parts of high-alumina bauxite ore granules with more than 70% aluminum content.

[0089] Solid raw materials - supplementary materials: 0.2 parts chromium powder, 0.7 parts alumina;

[0090] Liquid raw materials: 6 parts 85% phosphoric acid solution, 2 parts deionized water, 0.1 parts penetrant, 0.01 parts γ-aminopropylsilane;

[0091] Nanoparticles: 3 parts nano-grade zirconium corundum, 4 parts active nano-grade alumina powder, and 2 parts nano-grade chrome green; after the nanoparticles are mixed evenly, they are sealed and stored for later use.

[0092] Step 2: Add 85% phosphoric acid solution, deionized water, chromium powder, alumina, penetrant and γ-aminopropylsilane to a stirring device and mix at high speed to make the components evenly mixed to obtain a mixed slurry.

[0093] Step 3: Add the magnesium brick particles, high-purity quartz ore particles, low-grade chromium ore particles, and high-alumina bauxite ore particles, which have been washed with clean water to remove external impurities, into the mixing device. At this time, the liquid capacity in the heating tank is four times the capacity of the solid raw materials.

[0094] Step 4: Use a stirring device to continuously stir at a speed of 50 rpm for 30 days to allow the materials to fully react.

[0095] Step 5: Filter the reacted material to obtain filtrate and particulate residue;

[0096] Step 6: Add the nanopowder to the filtrate obtained in Step 5, heat it to 80°C in a mixing and stirring device, stir for 5 minutes, and obtain the product.

[0097] Step 7: Seal the packaging and put it into storage.

[0098] Example 7

[0099] like Figure 5 As shown, the difference between this embodiment and Embodiment 6 is that:

[0100] The only liquid raw materials used are 85% phosphoric acid solution and deionized water.

[0101] Example 1 was compared with the comparative example in terms of environmental friendliness, adhesion, flowability, permeability, high temperature resistance, corrosion resistance, structural stability, and viscosity.

[0102] Among them, the viscosity test was conducted using a Ford-4 viscometer at 25°C.

[0103] The permeability test provides a relative permeability value with pure water permeability as a reference;

[0104] The structural stability test is a thermal cycle test in the temperature range of 500-1600℃ with a temperature rise and fall speed of 200℃ per hour.

[0105] Comparative Example 1: A water-based environmentally friendly high-temperature resistant inorganic ceramic anticorrosive coating and a preparation method thereof disclosed in Chinese patent CN120399484A;

[0106] Comparative Example 2: A hard coating with thermal stability and high-temperature oxidation resistance, a preparation method and application thereof disclosed in Chinese patent CN120700451A;

[0107] Comparative Example 3: A modified chromium aluminum phosphate coating, its application and application method disclosed in Chinese patent CN119101381A;

[0108] Comparative Example 4: The difference between this comparative example and Example 1 is that each component is prepared by directly adding effective ingredients (without using ore soaking) to prepare chromium melting paint.

[0109]

[0110] From the above comparisons, it can be seen that Example 1 has stronger adhesion, more excellent permeability, high-temperature resistance and corrosion resistance while having the environmental friendliness, fluidity and structural stability of Comparative Examples 1-3. Through the comparison between Example 1 and Comparative Example 4, it can be seen that ore soaking can reduce the viscosity of chromium melting paint compared to directly adding effective ingredients, obtaining better fluidity and permeability.

[0111] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a high temperature resistant and erosion resistant chrome fusion enamel, characterized in that, The method comprises the following steps: Step 1, mixing acid, water, aluminum material, chromium material, magnesium material and silicon material; The aluminum material comprises bauxite ore with high aluminum content; the chromium material comprises chromium ore; the magnesium material comprises at least one of magnesium brick and magnesium ore; and the silicon material comprises silicon ore. Step 2, filtering and collecting the liquid after the reaction; Step 3, adding nano powder to the collected liquid in step 2, and then cooling after secondary boiling.

2. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 1, characterized in that: The acid is 85% phosphoric acid solution.

3. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 2, characterized in that: The chromium ore is low-grade chromium ore.

4. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 3, characterized in that: The method further comprises aluminum oxide and chromium powder.

5. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 4, characterized in that: The nano powder comprises nano zirconia corundum, active nano alumina powder and nano chromium green.

6. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 5, characterized in that, In step 1, the raw materials are proportioned as follows by weight: Liquid raw material: 85% phosphoric acid solution 6-8 parts; Solid raw material: magnesium material with magnesium content of 30%-40% 6-8 parts, silicon ore with silicon content of 99% 3-5 parts, low-grade chromium ore with chromium content of 8% 3-5 parts, chromium powder 0.2-0.3 parts, bauxite ore with aluminum content of more than 70% 10-15 parts, and aluminum oxide 0.7-1 part; The volume of the liquid raw material is controlled to be 4 times the volume of the solid raw material by adding water; In step 3, the components of the nano powder are proportioned as follows by weight: Nano zirconia corundum 3-6 parts, active nano alumina powder 4-8 parts, and nano chromium green 2-3 parts.

7. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 4 or 5, characterized in that: In step 1, the stirring speed is 50-100 rpm, and the reaction is carried out for 30 days before proceeding to step 2.

8. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 4 or 5, characterized in that, The specific steps of step 1 are as follows: Step 11, mixing acid, water, chromium powder and aluminum oxide, and stirring uniformly; Step 12, putting the mixture prepared in step 11 into a heating tank, and then adding magnesium material, silicon ore, chromium ore and bauxite ore with high aluminum content into the heating tank; Step 13, heating the heating tank to improve the reaction speed.

9. The method for preparing high-temperature resistant and corrosion-resistant chromium molten paint according to claim 8, characterized in that: In step 13, the heating is maintained for 30 min after boiling, and then the heating is stopped.

10. The method of claim 7, wherein the high temperature resistant, erosion resistant chrome fusion coating is prepared by: In step 11, a penetrating agent and a coupling agent are also mixed, the amount of the penetrating agent is 0.1-0.5 parts by weight, and the amount of the coupling agent is 0.01-0.05 parts by weight.

Images