High-temperature heat-resistant soil raw material

Abstract

The invention provides a high-temperature-resistant soil raw material, and belongs to the technical field of high-temperature-resistant materials. The high-temperature heat-resistant soil raw material comprises the following raw materials in percentage by weight: 23-35% of basic raw material with the particle size of 3-8mm; 12%-28% of a strengthening additive with the particle size smaller than or equal to 0.35 mm; 3%-10% of a functional auxiliary material; the basic raw material is composed of raw ore and rock dry burning mud, spodumene raw ore, quartz and feldspar, and the heat-resistant temperature of the high-temperature heat-resistant soil raw material is greater than or equal to 500 DEG C (can reach 729 DEG C in a short time); the thermal shock resistance is improved by the high alumina content and the mullite structure, cracking is avoided when the temperature difference is larger than or equal to 300 DEG C, the thermal expansion system is low (lt: 4 * 10 / DEG C), heat conduction is uniform, local overheating is avoided, and the characteristics of rapid cooling and rapid heating resistance, high mechanical strength, good chemical stability and the like are achieved; the electric cooker inner container is suitable for electric cooker inner containers, stewpots and other electric appliance matching part products, and the requirements of IH heating, open fire heating and other daily cooking utensils are met.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature resistant materials, and in particular to a high-temperature heat-resistant soil raw material. Background Art

[0002] Heat-resistant ceramics are a new generation of ceramic products. In addition to the advantages of conventional ceramics, they also offer remarkable resistance to rapid cooling and heating, allowing them to be used for stir-frying, deep-frying, boiling, and stewing foods directly over various heat sources. Therefore, they can replace existing metal and enamel cookware, which can also hold food and be heated directly over heat sources. Current heat-resistant ceramics are often based on kaolin, quartz, and feldspar, resulting in limited temperature tolerance and failing to meet the requirements for rapid cooling and heating resistance, high mechanical strength, and good chemical stability, resulting in a poor user experience. Summary of the Invention

[0003] In order to make up for the above shortcomings, the present invention provides a high-temperature heat-resistant soil raw material, which aims to improve the problem that current heat-resistant ceramics are often mainly composed of kaolin + quartz + feldspar, resulting in general temperature difference resistance.

[0004] The present invention is achieved in that:

[0005] The present invention provides a high-temperature heat-resistant soil raw material, the raw materials and weight ratio of which are:

[0006] Basic raw materials: particle size 3-8mm, 23%-35%; strengthening additives: particle size ≤0.35mm, 12%-28%; functional excipients: 3%-10%;

[0007] The basic raw materials are composed of dry-burned ore mud (Al2O3·2SiO2·2H2O·F2O3), spodumene ore (LiAL(SiO3)2, Cr3+), quartz (silicon dioxide) (SiO2), and feldspar (K2O·Al2O3·6SiO2). The basic raw materials include the following raw materials in parts by weight: 23-28 parts by weight of dry-burned ore mud, 5-13 parts by weight of spodumene ore, 30-40 parts by weight of quartz, and 12-23 parts by weight of feldspar;

[0008] The strengthening additive is composed of aluminum oxide (Al2O3), mullite (3Al2O3·2SiO2), silicon carbide (SiC) or silicon nitride (Si3N4), and the strengthening additive includes the following raw materials in parts by weight: 22-29 parts by weight of aluminum oxide, 10-16 parts by weight of mullite, and 33-39 parts by weight of silicon carbide (SiC) or silicon nitride (Si3N4);

[0009] The functional auxiliary materials are composed of rare earth oxide (Y2O3 or CeO2), clay binder (bentonite), high-temperature glaze (food grade, kiln temperature 1230-1280°C), and unglazed material. The functional auxiliary materials include the following raw materials in parts by weight: 6-13 parts by weight of rare earth oxide, 27-34 parts by weight of clay binder, 15-21 parts by weight of high-temperature glaze, and 7-18 parts by weight of unglazed material.

[0010] In one embodiment of the present invention, the method for extracting lithium from spodumene ore comprises the following steps:

[0011] Mixing lithium ore with an extractant to prepare a mixture, roasting the mixture to prepare a roasted material, and extracting the roasted material with a solvent to prepare an extract containing lithium salts, wherein the extractant includes calcium sulfate, sodium sulfate, and potassium sulfate;

[0012] The extractant has at least one of the following characteristics:

[0013] (1) The mass ratio of the calcium sulfate to the lithium ore (0.15-0.6): 1;

[0014] (2) The mass ratio of the sodium sulfate to the lithium ore is (0.05-0.4):1;

[0015] (3) The mass ratio of the potassium sulfate to the lithium ore is (0.01-0.4):1;

[0016] The calcination temperature is 930°C-980°C, and the calcination time is 0.5h-3h.

[0017] In one embodiment of the present invention, the raw ore rock dry-burned mud contains ferruginous clay rock, and the chemical composition of the ferruginous clay rock is silicon, aluminum, iron oxide, alkali metal, and alkali metal oxide.

[0018] In one embodiment of the present invention, the feldspar needs to be impurity-removed, and the impurity-removing method is used to separate quartz and iron-containing and / or peptide-containing mineral impurities in the feldspar, comprising the following steps:

[0019] (1) classifying the feldspar to obtain crushed ore with a particle size of 1-50 mm;

[0020] (2) The crushed ores fall into a conveying device, so that the crushed ores are separated from each other, and a light source illuminates the crushed ores to generate a light signal, which is collected by a CCD camera;

[0021] (3) The CCD camera converts the optical signal into an electrical signal through a converter. When the electrical signal is the same as a preset impurity value in the separation device, the separation device is activated to separate the impurities from the crushed ore;

[0022] A conveying device for conveying and shaking the crushed ore; a first CCD camera and a second CCD camera arranged opposite to each other, for acquiring optical signals of the crushed ore; a converter for converting the optical signals into electrical signals; a separation device for performing separation operations on the crushed ore; the first CCD camera and the second CCD camera are arranged at the discharge port of the conveying device; the converter is connected to the first CCD camera and the second CCD camera at the same time; the separation device is connected to the converter, and the crushed ore passes between the first CCD camera and the second CCD camera.

[0023] In one embodiment of the present invention, the production of the mullite needs to be screened, and the screening device includes a screening box and bottom supporting legs installed at the four corners of the bottom of the screening box, the top of the screening box is fixedly connected to an initial feeding bin, the inner side of the screening box is fixedly connected to two supporting racks, the outer sliding sleeves of the two supporting racks are provided with a supporting slide, the front end surface of the supporting slide is installed with a servo motor, the rear end surface of the output shaft of the servo motor is installed with a driving gear meshing with the supporting rack, both sides of the supporting slide are fixedly connected with a splash-proof outer cover, the top of the splash-proof outer cover is installed with a supporting blanking cylinder, and the top of the supporting blanking cylinder is installed with a second driving motor;

[0024] A feeding screw is installed at the bottom of the second driving motor, a feeding connecting hose is installed at the bottom of the initial feeding bin, a Y-shaped feeding connecting pipe is installed at the bottom of the feeding connecting hose, and the two ends of the Y-shaped feeding connecting pipe are respectively connected to the two supporting discharge cylinders, the inner side of the screening box is rotatably connected to a movable raw material screening net through a rotating shaft, a rubber soft baffle is fixedly connected between the outer end face of the movable raw material screening net and the screening box, the front end face of the screening box is installed with a first driving motor, and the rear end face of the output shaft of the first driving motor is fixedly connected to a rotating cam, and the mullite is generated by the reaction of quartz and alumina at high temperature.

[0025] In one embodiment of the present invention, the high-temperature glaze comprises, by weight, 65-85 parts of petalite, 4.2-6.8 parts of quartz powder, 3-6 parts of barium carbonate, 2.5-4 parts of calcite, 3.2-4.8 parts of bone meal, 4-6 parts of glass powder, 1.6-3.2 parts of talc, 2.2-4.4 parts of kaolin, and 2.5-5.5 parts of Re@Al-Zn powder.

[0026] The preparation method of the Re@Al-Zn powder comprises:

[0027] S1. Weigh aluminum-zinc alloy powder, ultrasonically treat it in anhydrous ethanol for 30 minutes, and dry it in an oven for later use;

[0028] S2. Weigh iminodiacetic acid, oxalic acid, and methionine, mix them in deionized water in sequence, and stir continuously at a temperature of 45-55° C. until all of them are uniformly dissolved. Then, add a wetting agent and continue stirring to obtain a solution A.

[0029] S3. Weigh rhenium trichloride into the hydrochloric acid solution and stir thoroughly at room temperature until uniform to obtain a rhenium trichloride solution; gradually add the rhenium trichloride solution dropwise to solution A while stirring. After all the rhenium trichloride is added, continue stirring and dispersing for 15-20 minutes to form solution B;

[0030] S4. Weigh titanium trichloride and dissolve it in deionized water to form a titanium trichloride solution; add the titanium trichloride solution to solution B, and then add the soda ash solution thereto to adjust the pH of the solution to 9.5-10.0, and stir thoroughly until uniform to form solution C;

[0031] S5. Add aluminum-zinc alloy powder to solution C and stir evenly at room temperature. Then raise the temperature to 75-95° C. and continue stirring to prevent the powder from agglomerating in the solution. After keeping the temperature and stirring for 3-5 hours, after the reaction is completed, filter out the powder, rinse it three times with deionized water under reduced pressure, and dry it in an oven to obtain Re@Al-Zn powder.

[0032] In one embodiment of the present invention, in S1, the purity of the aluminum-zinc alloy powder is greater than 99%, wherein the mass ratio of aluminum to zinc is: Al:Zn=2:1, and the mass volume ratio of the aluminum-zinc alloy powder to anhydrous ethanol is 1 g:(5-10) mL;

[0033] In S2, the wetting agent is at least one of polyethylene glycol PEG-1000, polyethylene glycol PEG-1200, polyethylene glycol PEG-1500, and polyethylene glycol PEG-2000;

[0034] In S2, the mass volume ratio of iminodiacetic acid, oxalic acid, methionine and deionized water is (0.13-0.21) g: (0.09-0.14) g: (0.15-0.22) g: 10 mL;

[0035] In S3, the concentration of the hydrochloric acid solution is 1.0-2.0 mol / L, the mass volume ratio of rhenium trichloride to the hydrochloric acid solution is 0.16 g: (3-7) mL; the volume ratio of the rhenium trichloride solution to solution A is 1:5-6;

[0036] In the titanium trichloride solution of S4, the mass volume ratio of titanium trichloride to deionized water is 0.15 g: (5-15) mL.

[0037] In one embodiment of the present invention, the method for preparing the rare earth oxide comprises the following steps:

[0038] S1, raw material processing: grinding the raw material to 250-350 mesh with a vibration ball mill, the raw material;

[0039] S2, roasting: the abrasive obtained in step 1 is placed in a roasting furnace, and concentrated sulfuric acid with a concentration of 98% is added at a ratio of 1:1.2-1.5 by weight, and heated to 150°C-800°C with stirring, and roasted for 3 hours-6 hours;

[0040] S3, crushing: add the raw materials roasted in step 2 into the crusher and crush them into 50-100 mesh;

[0041] S4, leaching: the raw material after the crushing in step 3 is placed in a leaching tank, water is added at a weight ratio of 1:4-8, stirred to dissolve the rare earth in the water, leached, and then clarified for 24 hours to 36 hours to make the liquid clear;

[0042] S5, filtration: the leachate after leaching in step 4 is poured into a plate frame and filtered to obtain a rare earth liquid;

[0043] S6. Preparation of rare earth oxides: preparing rare earth oxalate from rare earth liquid and then calcining it to prepare rare earth oxide.

[0044] In one embodiment of the present invention, the preparation process of the glaze-free material comprises the following steps:

[0045] S1. Crushing and grinding various raw materials to achieve appropriate particle sizes, wherein the raw materials include kaolin, bentonite, quartz, feldspar, and additives (talc and dolomite);

[0046] S2. Mix various raw materials thoroughly and evenly according to a certain formula to obtain unglazed material.

[0047] In one embodiment of the present invention, the clay binder includes a sintering aid, which is bentonite added with alkaline earth metal oxides, and the alkaline earth metal oxides are calcium oxide and / or magnesium oxide; wherein, in terms of mass percentage, the total amount of the alkaline earth metal oxides accounts for 2-12.5% of the total amount of the bentonite, and the magnesium oxide is obtained by decomposing magnesium carbonate. The raw materials of the clay binder include bentonite, aluminum oxide, boron oxide, calcium oxide and magnesium carbonate; wherein the mass ratio of magnesium carbonate to calcium oxide is 1:0.5-6.

[0048] The beneficial effects of the present invention are as follows: the high-temperature heat-resistant soil raw material obtained by the present invention through the above design, when used, the dry-burned mud of the original ore rock provides the skeleton structure of the ceramic, ensuring the formability and strength after sintering; the spodumene ore has a low expansion coefficient; quartz increases the hardness and heat resistance of the material and reduces the thermal expansion coefficient; feldspar acts as a flux to reduce the firing temperature, promote material densification, reduce porosity, and improve permeability and corrosion resistance; alumina (Al2O3) significantly improves the high temperature resistance (melting point 2050℃) and mechanical strength of the ceramic; mullite (3Al2O3·2SiO2) is a natural or artificially synthesized high-temperature resistant crystal, which reduces the thermal expansion coefficient, has excellent thermal shock resistance, and enhances thermal shock resistance; silicon carbide ( SiC) or silicon nitride (Si3N4) has strong thermal shock resistance and better thermal conductivity than traditional ceramics, making it suitable for rapid heating scenarios; rare earth oxides (such as Y2O3 and CeO2) improve the sintering performance of ceramics, refine grains, and enhance fracture toughness; clay binders (bentonite) improve green body strength; high-temperature glazes are lead-free glazes (mainly SiO2, CaO, and ZnO) for surface smoothing, with properties such as anti-sticking, easy cleaning, and strong chemical stability at high temperatures; glaze-free raw materials can enhance the taste of food. The high-temperature heat-resistant clay raw material has a heat resistance temperature of ≥500°C (up to 729°C for a short time); high alumina content + mullite structure improves thermal shock resistance, withstands temperature differences of ≥300°C without cracking, and has a low thermal expansion coefficient (<4×10 -6 / ℃), uniform heat conduction to avoid local overheating, with the characteristics of resistance to rapid cooling and heating, high mechanical strength, and good chemical stability; it is suitable for use in rice cooker inner pots, stew pots and other electrical appliance supporting components products, meeting the needs of daily cooking utensils such as IH heating and open flame heating. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] Example

[0051] The present invention provides a technical solution: a high-temperature heat-resistant soil raw material, the raw materials and weight ratio of which are:

[0052] Basic raw materials: particle size 3-8mm, 23%-35%; strengthening additives: particle size ≤0.35mm, 12%-28%; functional excipients: 3%-10%;

[0053] The basic raw materials are composed of dry-burned ore mud (Al2O3·2SiO2·2H2O·F2O3), spodumene ore (LiAL(SiO3)2, Cr3+), quartz (silicon dioxide) (SiO2), and feldspar (K2O·Al2O3·6SiO2). The basic raw materials include the following raw materials in parts by weight: 23-28 parts by weight of dry-burned ore mud, 5-13 parts by weight of spodumene ore, 30-40 parts by weight of quartz, and 12-23 parts by weight of feldspar. The method for extracting lithium from the spodumene ore comprises the following steps:

[0054] Mixing lithium ore with an extractant to prepare a mixture, roasting the mixture to prepare a roasted material, and extracting the roasted material with a solvent to prepare an extract containing lithium salts, wherein the extractant includes calcium sulfate, sodium sulfate, and potassium sulfate;

[0055] The extractant has at least one of the following characteristics:

[0056] (1) The mass ratio of the calcium sulfate to the lithium ore (0.15-0.6): 1;

[0057] (2) The mass ratio of the sodium sulfate to the lithium ore is (0.05-0.4):1;

[0058] (3) The mass ratio of the potassium sulfate to the lithium ore is (0.01-0.4):1;

[0059] The calcination temperature is 930-980°C and the calcination time is 0.5-3 hours.

[0060] The raw ore rock dry-burned mud contains ferruginous clay rock, and the chemical composition of the ferruginous clay rock is silicon, aluminum, iron oxide, alkali metal, and alkali metal oxide;

[0061] The strengthening additive is composed of aluminum oxide (Al2O3), mullite (3Al2O3·2SiO2), silicon carbide (SiC) or silicon nitride (Si3N4), and the strengthening additive includes the following raw materials in parts by weight: 22-29 parts by weight of aluminum oxide, 10-16 parts by weight of mullite, and 33-39 parts by weight of silicon carbide (SiC) or silicon nitride (Si3N4);

[0062] The feldspar needs to be impurity-removed. The impurity-removal method is used to separate quartz and iron-containing and / or peptide-containing mineral impurities in the feldspar, comprising the following steps:

[0063] (1) classifying the feldspar to obtain crushed ore with a particle size of 1-50 mm;

[0064] (2) The crushed ores fall into a conveying device, so that the crushed ores are separated from each other, and a light source illuminates the crushed ores to generate a light signal, which is collected by a CCD camera;

[0065] (3) The CCD camera converts the optical signal into an electrical signal through a converter. When the electrical signal is the same as a preset impurity value in the separation device, the separation device is activated to separate the impurities from the crushed ore;

[0066] A conveying device for conveying and shaking the crushed ore; a first CCD camera and a second CCD camera arranged opposite to each other for acquiring optical signals from the crushed ore; a converter for converting the optical signals into electrical signals; a separation device for performing a separation operation on the crushed ore; the first CCD camera and the second CCD camera are arranged at the discharge port of the conveying device; the converter is connected to both the first CCD camera and the second CCD camera; the separation device is connected to the converter, and the crushed ore passes between the first CCD camera and the second CCD camera;

[0067] The functional auxiliary materials are composed of rare earth oxide (Y2O3 or CeO2), clay binder (bentonite), high temperature glaze (food grade, kiln temperature 1230-1280°C), and no glaze. The functional auxiliary materials include the following raw materials in parts by weight: 6-13 parts by weight of rare earth oxide, 27-34 parts by weight of clay binder, 15-21 parts by weight of high temperature glaze, and 7-18 parts by weight of no glaze. The production of mullite needs to be screened, and the screening device includes a screening box and four corners installed at the bottom of the screening box. The bottom supporting legs are at the bottom, the top of the screening box is fixedly connected with an initial feeding bin, the inner side of the screening box is fixedly connected with two supporting racks, the outer sliding sleeves of the two supporting racks are provided with a supporting slide, the front end surface of the supporting slide is installed with a servo motor, the rear end surface of the output shaft of the servo motor is installed with a driving gear meshing with the supporting rack, both sides of the supporting slide are fixedly connected with a splash-proof outer cover, the top of the splash-proof outer cover is installed with a supporting blanking cylinder, and the top of the supporting blanking cylinder is installed with a second driving motor;

[0068] A feeding screw is installed at the bottom of the second driving motor, a feeding connecting hose is installed at the bottom of the initial feeding bin, a Y-shaped feeding connecting pipe is installed at the bottom of the feeding connecting hose, and the two ends of the Y-shaped feeding connecting pipe are respectively connected to the two supporting discharge cylinders, the inner side of the sub-screening box is rotatably connected to a movable raw material screening net through a rotating shaft, a rubber soft baffle is fixedly connected between the outer end surface of the movable raw material screening net and the sub-screening box, the front end surface of the sub-screening box is installed with a first driving motor, and the rear end surface of the output shaft of the first driving motor is fixedly connected to a rotating cam, and the mullite is generated by the reaction of quartz and alumina at high temperature;

[0069] The high-temperature glaze comprises, by weight, 65-85 parts of petalite, 4.2-6.8 parts of quartz powder, 3-6 parts of barium carbonate, 2.5-4 parts of calcite, 3.2-4.8 parts of bone meal, 4-6 parts of glass powder, 1.6-3.2 parts of talc, 2.2-4.4 parts of kaolin, and 2.5-5.5 parts of Re@Al-Zn powder;

[0070] The preparation method of the Re@Al-Zn powder comprises:

[0071] S1. Weigh aluminum-zinc alloy powder, ultrasonically treat it in anhydrous ethanol for 30 minutes, and dry it in an oven for later use;

[0072] S2. Weigh iminodiacetic acid, oxalic acid, and methionine, mix them in deionized water in sequence, and stir continuously at a temperature of 45-55° C. until all of them are uniformly dissolved. Then, add a wetting agent and continue stirring to obtain a solution A.

[0073] S3. Weigh rhenium trichloride into the hydrochloric acid solution and stir thoroughly at room temperature until uniform to obtain a rhenium trichloride solution; gradually add the rhenium trichloride solution dropwise to solution A while stirring. After all the rhenium trichloride is added, continue stirring and dispersing for 15-20 minutes to form solution B;

[0074] S4. Weigh titanium trichloride and dissolve it in deionized water to form a titanium trichloride solution; add the titanium trichloride solution to solution B, and then add the soda ash solution thereto to adjust the pH of the solution to 9.5-10.0, and stir thoroughly until uniform to form solution C;

[0075] S5. Add aluminum-zinc alloy powder to solution C and stir evenly at room temperature. Then, heat the solution to 75-95° C. and continue stirring to prevent the powder from agglomerating in the solution. After the solution is heated and stirred for 3-5 hours, the powder is filtered out and rinsed three times with deionized water under reduced pressure. The powder is then dried in an oven to obtain Re@Al-Zn powder.

[0076] In S1, the purity of the aluminum-zinc alloy powder is greater than 99%, wherein the mass ratio of aluminum to zinc is: Al:Zn=2:1, and the mass-to-volume ratio of the aluminum-zinc alloy powder to anhydrous ethanol is 1 g:(5-10) mL;

[0077] In S2, the wetting agent is at least one of polyethylene glycol PEG-1000, polyethylene glycol PEG-1200, polyethylene glycol PEG-1500, and polyethylene glycol PEG-2000;

[0078] In S2, the mass volume ratio of iminodiacetic acid, oxalic acid, methionine and deionized water is (0.13-0.21) g: (0.09-0.14) g: (0.15-0.22) g: 10 mL;

[0079] In S3, the concentration of the hydrochloric acid solution is 1.0-2.0 mol / L, the mass volume ratio of rhenium trichloride to the hydrochloric acid solution is 0.16 g: (3-7) mL; the volume ratio of the rhenium trichloride solution to solution A is 1:5-6;

[0080] In the titanium trichloride solution of S4, the mass volume ratio of titanium trichloride to deionized water is 0.15 g: (5-15) mL;

[0081] The method for preparing the rare earth oxide comprises the following steps:

[0082] S1, raw material processing: grinding the raw material to 250-350 mesh with a vibration ball mill, the raw material;

[0083] S2, roasting: the abrasive obtained in step 1 is placed in a roasting furnace, and concentrated sulfuric acid with a concentration of 98% is added at a ratio of 1:1.2-1.5 by weight, and heated to 150°C-800°C with stirring, and roasted for 3 hours-6 hours;

[0084] S3, crushing: add the raw materials roasted in step 2 into the crusher and crush them into 50-100 mesh;

[0085] S4, leaching: the raw material after the crushing in step 3 is placed in a leaching tank, water is added at a weight ratio of 1:4-8, stirred to dissolve the rare earth in the water, leached, and then clarified for 24 hours to 36 hours to make the liquid clear;

[0086] S5, filtration: the leachate after leaching in step 4 is poured into a plate frame and filtered to obtain a rare earth liquid;

[0087] S6. Preparation of rare earth oxides: preparing rare earth oxalate from rare earth liquid and then calcining it to prepare rare earth oxides;

[0088] The preparation process of the glaze-free material comprises the following steps:

[0089] S1. Crushing and grinding various raw materials to achieve appropriate particle sizes, wherein the raw materials include kaolin, bentonite, quartz, feldspar, and additives (talc and dolomite);

[0090] S2. Mix various raw materials thoroughly and evenly according to a certain formula to obtain unglazed material;

[0091] The clay binder includes a sintering aid, which is bentonite added with alkaline earth metal oxides, and the alkaline earth metal oxides are calcium oxide and / or magnesium oxide. In particular, the total amount of the alkaline earth metal oxides accounts for 2-12.5% of the total amount of the bentonite, and the magnesium oxide is obtained by decomposing magnesium carbonate. The raw materials of the clay binder include bentonite, aluminum oxide, boron oxide, calcium oxide and magnesium carbonate. In particular, the mass ratio of magnesium carbonate to calcium oxide is 1:0.5-6.

[0092] Specifically, the working principle of the high-temperature heat-resistant soil raw material is as follows: when used, the dry-burned mud of the original ore rock provides the skeleton structure of the ceramic to ensure the formability and strength after sintering; the original spodumene ore has a low expansion coefficient; quartz increases the hardness and heat resistance of the material and reduces the thermal expansion coefficient; feldspar acts as a flux to reduce the firing temperature, promote material densification, reduce porosity, and improve permeability and corrosion resistance; alumina (Al2O3) significantly improves the high temperature resistance (melting point 2050℃) and mechanical strength of the ceramic; mullite (3Al2O3·2SiO2) is a natural or artificially synthesized high-temperature resistant crystal, which reduces the thermal expansion coefficient, has excellent thermal shock resistance, and enhances thermal shock resistance; silicon carbide (SiC) or nitride Silicon (Si3N4) has strong thermal shock resistance and better thermal conductivity than traditional ceramics, making it suitable for rapid heating scenarios; rare earth oxides (such as Y2O3 and CeO2) improve the sintering performance of ceramics, refine grains, and enhance fracture toughness; clay binders (bentonite) increase green strength; high-temperature glazes are lead-free glazes (mainly SiO2, CaO, and ZnO) for surface smoothing, with properties such as anti-sticking, easy cleaning, and strong chemical stability at high temperatures; glaze-free raw materials can enhance the taste of food. The high-temperature heat-resistant clay raw material has a heat resistance temperature of ≥500°C (up to 729°C for a short time); high alumina content + mullite structure improves thermal shock resistance, withstands temperature differences of ≥300°C without cracking, and has a low thermal expansion coefficient (<4×10 -6 / ℃), uniform heat conduction to avoid local overheating, with the characteristics of resistance to rapid cooling and heating, high mechanical strength, and good chemical stability; it is suitable for use in rice cooker inner pots, stew pots and other electrical appliance supporting components products, meeting the needs of daily cooking utensils such as IH heating and open flame heating.

[0093] The foregoing description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-temperature heat-resistant soil raw material, the raw materials and weight ratio of which are: Basic raw materials: particle size 3-8mm, 23%-35%; strengthening additives: particle size ≤0.35mm, 12%-28%; functional excipients: 3%-10%; The basic raw materials are composed of dry-burned ore mud (Al2O3·2SiO2·2H2O·F2O3), spodumene ore (LiAL(SiO3)2, Cr3+), quartz (silicon dioxide) (SiO2), and feldspar (K2O·Al2O3·6SiO2). The basic raw materials include the following raw materials in parts by weight: 23-28 parts by weight of dry-burned ore mud, 5-13 parts by weight of spodumene ore, 30-40 parts by weight of quartz, and 12-23 parts by weight of feldspar; The strengthening additive is composed of aluminum oxide (Al2O3), mullite (3Al2O3·2SiO2), silicon carbide (SiC) or silicon nitride (Si3N4), and the strengthening additive includes the following raw materials in parts by weight: 22-29 parts by weight of aluminum oxide, 10-16 parts by weight of mullite, and 33-39 parts by weight of silicon carbide (SiC) or silicon nitride (Si3N4); The functional auxiliary materials are composed of rare earth oxide (Y2O3 or CeO2), clay binder (bentonite), high-temperature glaze (food grade, kiln temperature 1230-1280°C), and unglazed material. The functional auxiliary materials include the following raw materials in parts by weight: 6-13 parts by weight of rare earth oxide, 27-34 parts by weight of clay binder, 15-21 parts by weight of high-temperature glaze, and 7-18 parts by weight of unglazed material.

2. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The method for extracting lithium from the spodumene ore comprises the following steps: Mixing lithium ore with an extractant to prepare a mixture, roasting the mixture to prepare a roasted material, and extracting the roasted material with a solvent to prepare an extract containing lithium salts, wherein the extractant includes calcium sulfate, sodium sulfate, and potassium sulfate; The extractant has at least one of the following characteristics: (1) The mass ratio of the calcium sulfate to the lithium ore (0.15-0.6): 1; (2) The mass ratio of the sodium sulfate to the lithium ore is (0.05-0.4):1; (3) The mass ratio of the potassium sulfate to the lithium ore is (0.01-0.4):1; The calcination temperature is 930°C-980°C, and the calcination time is 0.5h-3h.

3. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The raw ore rock dry-burned mud contains ferruginous clay rock, and the chemical composition of the ferruginous clay rock is silicon, aluminum, iron oxide, alkali metal, and alkali metal oxide.

4. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The feldspar needs to be impurity-removed. The impurity-removal method is used to separate quartz and iron-containing and / or peptide-containing mineral impurities in the feldspar, comprising the following steps: (1) classifying the feldspar to obtain crushed ore with a particle size of 1-50 mm; (2) The crushed ores fall into a conveying device, so that the crushed ores are separated from each other, and a light source illuminates the crushed ores to generate a light signal, which is collected by a CCD camera; (3) The CCD camera converts the optical signal into an electrical signal through a converter. When the electrical signal is the same as a preset impurity value in the separation device, the separation device is activated to separate the impurities from the crushed ore; A conveying device for conveying and shaking the crushed ore; a first CCD camera and a second CCD camera arranged opposite to each other, for acquiring optical signals of the crushed ore; a converter for converting the optical signals into electrical signals; a separation device for performing separation operations on the crushed ore; the first CCD camera and the second CCD camera are arranged at the discharge port of the conveying device; the converter is connected to the first CCD camera and the second CCD camera at the same time; the separation device is connected to the converter, and the crushed ore passes between the first CCD camera and the second CCD camera.

5. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The production of the mullite needs to be screened, and the screening device includes a screening box and bottom supporting legs installed at the four corners of the bottom of the screening box, the top of the screening box is fixedly connected to the initial feeding bin, the inner side of the screening box is fixedly connected to two supporting racks, the outer sliding sleeves of the two supporting racks are provided with a supporting slide, the front end surface of the supporting slide is installed with a servo motor, the rear end surface of the output shaft of the servo motor is installed with a driving gear meshing with the supporting rack, both sides of the supporting slide are fixedly connected with a splash-proof outer cover, the top of the splash-proof outer cover is installed with a supporting blanking cylinder, and the top of the supporting blanking cylinder is installed with a second driving motor; A feeding screw is installed at the bottom of the second driving motor, a feeding connecting hose is installed at the bottom of the initial feeding bin, a Y-shaped feeding connecting pipe is installed at the bottom of the feeding connecting hose, and the two ends of the Y-shaped feeding connecting pipe are respectively connected to the two supporting discharge cylinders, the inner side of the screening box is rotatably connected to a movable raw material screening net through a rotating shaft, a rubber soft baffle is fixedly connected between the outer end face of the movable raw material screening net and the screening box, the front end face of the screening box is installed with a first driving motor, and the rear end face of the output shaft of the first driving motor is fixedly connected to a rotating cam, and the mullite is generated by the reaction of quartz and alumina at high temperature.

6. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The high-temperature glaze comprises, by weight, 65-85 parts of petalite, 4.2-6.8 parts of quartz powder, 3-6 parts of barium carbonate, 2.5-4 parts of calcite, 3.2-4.8 parts of bone meal, 4-6 parts of glass powder, 1.6-3.2 parts of talc, 2.2-4.4 parts of kaolin, and 2.5-5.5 parts of Re@Al-Zn powder; The preparation method of the Re@Al-Zn powder comprises: S1. Weigh aluminum-zinc alloy powder, ultrasonically treat it in anhydrous ethanol for 30 minutes, and dry it in an oven for later use; S2, weighing iminodiacetic acid, oxalic acid and methionine, mixed in deionized water in sequence, and stirred continuously at a temperature of 45-55 ° C until all were uniformly dissolved, and then adding a wetting agent, and continuing to stir until uniformly dissolved to obtain solution A; S3. Weigh rhenium trichloride into the hydrochloric acid solution and stir thoroughly at room temperature until uniform to obtain a rhenium trichloride solution; gradually add the rhenium trichloride solution dropwise to solution A while stirring. After all the rhenium trichloride is added, continue stirring and dispersing for 15-20 minutes to form solution B; S4. Weigh titanium trichloride and dissolve it in deionized water to form a titanium trichloride solution; add the titanium trichloride solution to solution B, and then add the soda ash solution thereto to adjust the pH of the solution to 9.5-10.0, and stir thoroughly until uniform to form solution C; S5. Add aluminum-zinc alloy powder to solution C and stir evenly at room temperature. Then, raise the temperature to 75-95° C. and continuously stir to prevent the powder from agglomerating in the solution. After maintaining the temperature and stirring for 3-5 hours, after the reaction is completed, filter out the powder, rinse it three times with deionized water under reduced pressure, and dry it in an oven to obtain Re@Al-Zn powder.

7. The high-temperature heat-resistant soil raw material according to claim 6, characterized in that: In S1, the purity of the aluminum-zinc alloy powder is greater than 99%, wherein the mass ratio of aluminum to zinc is: Al:Zn=2:1, and the mass-to-volume ratio of the aluminum-zinc alloy powder to anhydrous ethanol is 1 g:(5-10) mL; In S2, the wetting agent is at least one of polyethylene glycol PEG-1000, polyethylene glycol PEG-1200, polyethylene glycol PEG-1500, and polyethylene glycol PEG-2000; In S2, the mass volume ratio of iminodiacetic acid, oxalic acid, methionine and deionized water is (0.13-0.21) g: (0.09-0.14) g: (0.15-0.22) g: 10 mL; In S3, the concentration of the hydrochloric acid solution is 1.0-2.0 mol / L, the mass volume ratio of rhenium trichloride to the hydrochloric acid solution is 0.16 g: (3-7) mL; the volume ratio of the rhenium trichloride solution to solution A is 1:5-6; In the titanium trichloride solution of S4, the mass volume ratio of titanium trichloride to deionized water is 0.15 g: (5-15) mL.

8. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The method for preparing the rare earth oxide comprises the following steps: S1, raw material processing: grinding the raw material to 250-350 mesh with a vibration ball mill, the raw material; S2, roasting: the abrasive obtained in step 1 is placed in a roasting furnace, and 98% concentrated sulfuric acid is added at a ratio of 1:1.2-1.5 by weight, and heated to 150°C-800°C with stirring, and roasted for 3 hours-6 hours; S3, crushing: add the raw materials roasted in step 2 into the crusher and crush them into 50-100 mesh; S4, leaching: the raw material after the crushing in step 3 is placed in a leaching tank, water is added at a weight ratio of 1:4-8, stirred to dissolve the rare earth in the water, leached, and then clarified for 24 hours to 36 hours to make the liquid clear; S5, filtration: the leachate after leaching in step 4 is poured into a plate frame and filtered to obtain a rare earth liquid; S6. Preparation of rare earth oxides: preparing rare earth oxalate from rare earth liquid and then calcining it to prepare rare earth oxide.

9. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The preparation process of the glaze-free material comprises the following steps: S1. Crush and grind various raw materials separately to achieve appropriate particle sizes, wherein the raw materials include kaolin, bentonite, quartz, feldspar, and additives (talc and dolomite); S2. Mix various raw materials thoroughly and evenly according to a certain formula to obtain unglazed material.

10. The high-temperature heat-resistant soil raw material according to claim 1, characterized in that: The clay binder includes a sintering aid, which is bentonite added with alkaline earth metal oxides, and the alkaline earth metal oxides are calcium oxide and / or magnesium oxide. In particular, the total amount of the alkaline earth metal oxides accounts for 2-12.5% of the total amount of the bentonite, and the magnesium oxide is obtained by decomposing magnesium carbonate. The raw materials of the clay binder include bentonite, aluminum oxide, boron oxide, calcium oxide and magnesium carbonate. In particular, the mass ratio of magnesium carbonate to calcium oxide is 1:0.5-6.