A production process and application of alumina-magnesia spinel brick material

Abstract

The present invention relates to the technical field of aluminum-magnesium spinel bricks, and specifically to a production process and application of an aluminum-magnesium spinel brick material, comprising the following steps: weighing raw materials according to weight: 30-35 parts of corundum, 8-12 parts of aluminum-magnesium spinel, 6-10 parts of added filler, 5-8 parts of coordination additive, 4-7 parts of magnesia powder, 3-5 parts of aluminum oxide, and 1-3 parts of binder. The aluminum-magnesium spinel brick material of the present invention adopts corundum combined with aluminum-magnesium spinel, magnesia powder, aluminum oxide, and binder raw materials, and at the same time adds added filler and coordination additive as blending and coordinating raw materials. The aluminum-magnesium spinel brick prepared by the present invention has coordinated improvements in apparent porosity performance, wear resistance, and compressive resistance, and the product has significant effects on water resistance and cold and heat stability.

Description

Technical Field

[0001] The present invention relates to the technical field of alumina-magnesia spinel bricks, and in particular to a production process of alumina-magnesia spinel brick materials and applications thereof. Background Art

[0002] Alumina-magnesium spinel bricks are a new type of high-performance refractory material, widely used in high-temperature kilns and heat treatment equipment in the steel, ironmaking, cement, and glass industries. Existing alumina-magnesium spinel bricks suffer from poor apparent porosity, wear resistance, and compressive strength, making it difficult to achieve coordinated performance improvements. Furthermore, the bricks suffer from poor water resistance and thermal stability, limiting their effectiveness. Summary of the Invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a production process of alumina-magnesia spinel brick material and its application to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solutions:

[0005] The present invention provides a production process of alumina-magnesia spinel brick material, comprising the following steps:

[0006] Step 1: weigh the raw materials according to weight:

[0007] 30-35 parts of corundum, 8-12 parts of aluminum-magnesium spinel, 6-10 parts of added filler, 5-8 parts of coordination additive, 4-7 parts of magnesia powder, 3-5 parts of aluminum oxide, 1-3 parts of binder;

[0008] Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour;

[0009] Step three, sintering the formed product for another 2-4 hours at a sintering temperature of 1500-1600° C., and completing the sintering to obtain an alumina-magnesia spinel brick material.

[0010] Preferably, the particle size of the corundum is 0.5-0.6 mm; the particle size of the magnesia powder is 0.3-0.4 mm; the particle size of the alumina is 0.01-0.02 mm; the particle size of the alumina-magnesia spinel is 0.3-0.4 mm; and the binder is a pulp solution.

[0011] Preferably, the preparation method of the added filler is:

[0012] S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry;

[0013] Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully mixed in a weight ratio of (2-3): (5-7): 1 to obtain sodium carboxymethyl cellulose solution;

[0014] S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution;

[0015] S03: Preparation of filler:

[0016] S031: 2-3 parts by weight of a boron nitride modifier and 1-3 parts by weight of a urea solution are mixed and added to 5-8 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution;

[0017] S032: 3-5 parts by weight of barium sulfate, 5-8 parts by weight of sodium dodecylbenzenesulfonate solution, and 2-3 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution;

[0018] The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler;

[0019] S04: The calcium sulfate whisker solution and the filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler.

[0020] Preferably, the mass fraction of the sodium dodecylbenzenesulfonate solution is 3-5%; the mass fraction of the urea solution is 2-4%.

[0021] Preferably, the ultrasonic treatment in S032 has an ultrasonic power of 300-350W and is performed for 2 hours.

[0022] Preferably, the preparation method of the boron nitride modifier is:

[0023] 3-5 parts by weight of boron nitride and 2-3 parts by weight of zirconium oxide are added to 5-8 parts by weight of yttrium nitrate solution, followed by adding 2-3 parts by weight of calcium titanate, and the mixture is fully blended, filtered, dried, and sintered at 170-180°C for 1 hour. After sintering, the mixture is ball-milled to 100 mesh to obtain a boron nitride modifier.

[0024] The added filler is calcium sulfate whiskers that are treated with hydrogen peroxide solution for optimization and improvement, and then improved by stirring with sodium carboxymethyl cellulose solution. The sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol in the sodium carboxymethyl cellulose solution are coordinated and optimized into the system, so that the calcium sulfate whisker solution and the filler can be better ball-milled and improved. The compounding solution and barium sulfate solution in the filler are ultrasonically compounded and optimized. The boron nitride modifier and urea solution in the compounding solution are blended and blended with 5% by mass dopamine hydrochloride solution. At the same time, the barium sulfate in the barium sulfate solution is blended with sodium dodecylbenzenesulfonate solution and sodium alginate. Through the coordination and synergy between the raw materials, the prepared filler is further supplemented and filled into the system, thereby significantly improving the performance coordination and performance stability of the system.

[0025] The boron nitride modifier is improved by blending boron nitride, zirconium oxide, calcium titanate and yttrium nitrate, and then sintered and optimized. The prepared boron nitride modifier is further formulated into the system, thereby further improving the performance of the product system.

[0026] Preferably, the mass fraction of the yttrium nitrate solution is 2-4%.

[0027] Preferably, the preparation method of the coordination additive is:

[0028] S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is (2-4):1:(4-7);

[0029] S102: 4-6 parts by weight of cordierite and 3-4 parts by weight of mica powder are blended and added to 5-8 parts by weight of sodium lignin sulfonate solution, followed by adding 1-2 parts by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution;

[0030] The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

[0031] The coordination additive is prepared by blending clay, titanium oxide and barium nitrate solution to form a coordination liquid. Cordierite and mica powder are blended and added to the sodium lignin sulfonate solution, and then combined with the silane coupling agent KH550 to obtain the cordierite liquid. Through the direct blending and optimization of the cordierite liquid and the coordination liquid, the coordination additive is further reinforced by the added filler, thereby further improving the performance of the product.

[0032] Preferably, the mass fraction of the barium nitrate solution is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 5-8%; the ultrasonic power of the ultrasonic treatment is 450-500W, and the ultrasonic treatment lasts for 1 hour.

[0033] The present invention also provides an application of a production process of an alumina-magnesia spinel brick material in the preparation of alumina-magnesia spinel bricks.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The aluminum-magnesium spinel brick material of the present invention adopts corundum, aluminum-magnesium spinel, magnesia powder, alumina, and binder raw materials, and at the same time adds fillers and coordinating additives as blending and coordinating raw materials. The aluminum-magnesium spinel brick prepared by the present invention has coordinated improvements in apparent porosity performance, wear resistance, and compressive resistance, and the product has significant effects on water resistance and cold and heat stability. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. 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.

[0037] A production process of an alumina-magnesia spinel brick material of this embodiment includes the following steps:

[0038] Step 1: weigh the raw materials according to weight:

[0039] 30-35 parts of corundum, 8-12 parts of aluminum-magnesium spinel, 6-10 parts of added filler, 5-8 parts of coordination additive, 4-7 parts of magnesia powder, 3-5 parts of aluminum oxide, 1-3 parts of binder;

[0040] Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour;

[0041] Step three, sintering the formed product for another 2-4 hours at a sintering temperature of 1500-1600° C., and completing the sintering to obtain an alumina-magnesia spinel brick material.

[0042] In this embodiment, the particle size of the corundum is 0.5-0.6 mm; the particle size of the magnesia powder is 0.3-0.4 mm; the particle size of the alumina is 0.01-0.02 mm; the particle size of the alumina-magnesia spinel is 0.3-0.4 mm; and the binder is a pulp solution.

[0043] The preparation method of the added filler of this embodiment is:

[0044] S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry;

[0045] Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully mixed in a weight ratio of (2-3): (5-7): 1 to obtain sodium carboxymethyl cellulose solution;

[0046] S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution;

[0047] S03: Preparation of filler:

[0048] S031: 2-3 parts by weight of a boron nitride modifier and 1-3 parts by weight of a urea solution are mixed and added to 5-8 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution;

[0049] S032: 3-5 parts by weight of barium sulfate, 5-8 parts by weight of sodium dodecylbenzenesulfonate solution, and 2-3 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution;

[0050] The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler;

[0051] S04: The calcium sulfate whisker solution and the filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler.

[0052] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 3-5%; the mass fraction of the urea solution is 2-4%.

[0053] The ultrasonic treatment in S032 of this embodiment has an ultrasonic power of 300-350W and is performed for 2 hours.

[0054] The preparation method of the boron nitride modifier of this embodiment is:

[0055] 3-5 parts by weight of boron nitride and 2-3 parts by weight of zirconium oxide are added to 5-8 parts by weight of yttrium nitrate solution, followed by adding 2-3 parts by weight of calcium titanate, and the mixture is fully blended, filtered, dried, and sintered at 170-180°C for 1 hour. After sintering, the mixture is ball-milled to 100 mesh to obtain a boron nitride modifier.

[0056] The mass fraction of the yttrium nitrate solution in this embodiment is 2-4%.

[0057] The preparation method of the coordination additive of this embodiment is:

[0058] S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is (2-4):1:(4-7);

[0059] S102: 4-6 parts by weight of cordierite and 3-4 parts by weight of mica powder are blended and added to 5-8 parts by weight of sodium lignin sulfonate solution, followed by adding 1-2 parts by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution;

[0060] The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

[0061] The mass fraction of the barium nitrate solution in this embodiment is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 5-8%; the ultrasonic power of the ultrasonic treatment is 450-500W, and the ultrasonic treatment is performed for 1 hour.

[0062] The present embodiment provides an application of a production process of an alumina-magnesia spinel brick material in the preparation of alumina-magnesia spinel bricks.

[0063] Example 1

[0064] A production process of an alumina-magnesia spinel brick material of this embodiment includes the following steps:

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

[0066] 30 parts of corundum, 8 parts of aluminum-magnesium spinel, 6 parts of added filler, 5 parts of coordination additive, 4 parts of magnesia powder, 3 parts of aluminum oxide, 1 part of binder;

[0067] Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour;

[0068] Step three, sintering the formed product for another 2 hours at a sintering temperature of 1500° C., and completing the sintering to obtain an alumina-magnesia spinel brick material.

[0069] In this embodiment, the particle size of the corundum is 0.5 mm; the particle size of the magnesia powder is 0.3 mm; the particle size of the aluminum oxide is 0.01 mm; the particle size of the aluminum magnesium spinel is 0.3 mm; and the binder is a pulp solution.

[0070] The preparation method of the added filler of this embodiment is:

[0071] S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry;

[0072] Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully blended in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0073] S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution;

[0074] S03: Preparation of filler:

[0075] S031: 2 parts by weight of a boron nitride modifier and 1 part by weight of a urea solution were mixed and added to 5 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution;

[0076] S032: 3 parts by weight of barium sulfate, 5 parts by weight of sodium dodecylbenzenesulfonate solution, and 2 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution;

[0077] The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler;

[0078] S04: The calcium sulfate whisker solution and the filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler.

[0079] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 3-5%; the mass fraction of the urea solution is 2-4%.

[0080] The ultrasonic treatment in S032 of this embodiment has an ultrasonic power of 300 W and is carried out for 2 hours.

[0081] The preparation method of the boron nitride modifier of this embodiment is:

[0082] 3 parts by weight of boron nitride and 2 parts by weight of zirconium oxide were added to 5 parts by weight of yttrium nitrate solution, followed by adding 2 parts by weight of calcium titanate, blending thoroughly, filtering, drying, and sintering at 170°C for 1 hour. After sintering, the mixture was ball-milled to 100 mesh to obtain a boron nitride modifier.

[0083] The mass fraction of the yttrium nitrate solution in this embodiment is 2%.

[0084] The preparation method of the coordination additive of this embodiment is:

[0085] S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is 2:1:4;

[0086] S102: 4 parts by weight of cordierite and 3 parts by weight of mica powder are blended and added to 5 parts by weight of sodium lignin sulfonate solution, followed by adding 1 part by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution;

[0087] The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

[0088] The mass fraction of the barium nitrate solution in this embodiment is 2%; the mass fraction of the sodium lignin sulfonate solution is 5%; the ultrasonic power of the ultrasonic treatment is 450W, and the ultrasonic treatment is performed for 1 hour.

[0089] The present embodiment provides an application of a production process of an alumina-magnesia spinel brick material in the preparation of alumina-magnesia spinel bricks.

[0090] Example 2

[0091] A production process of an alumina-magnesia spinel brick material of this embodiment includes the following steps:

[0092] Step 1: weigh the raw materials according to weight:

[0093] 35 parts of corundum, 12 parts of aluminum-magnesium spinel, 10 parts of added filler, 8 parts of coordination additive, 7 parts of magnesia powder, 5 parts of aluminum oxide, 3 parts of binder;

[0094] Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour;

[0095] Step three, sintering the formed product for another 4 hours at a sintering temperature of 1600° C., and completing the sintering to obtain an alumina-magnesia spinel brick material.

[0096] In this embodiment, the particle size of the corundum is 0.6 mm; the particle size of the magnesia powder is 0.4 mm; the particle size of the aluminum oxide is 0.02 mm; the particle size of the aluminum magnesium spinel is 0.4 mm; and the binder is a pulp solution.

[0097] The preparation method of the added filler of this embodiment is:

[0098] S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry;

[0099] Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully blended in a weight ratio of 3:7:1 to obtain a sodium carboxymethyl cellulose solution;

[0100] S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution;

[0101] S03: Preparation of filler:

[0102] S031: 3 parts by weight of a boron nitride modifier and 3 parts by weight of a urea solution were mixed and added to 8 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution;

[0103] S032: 5 parts by weight of barium sulfate, 8 parts by weight of sodium dodecylbenzenesulfonate solution, and 3 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution;

[0104] The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler;

[0105] S04: The calcium sulfate whisker solution and the filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler.

[0106] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5%; the mass fraction of the urea solution is 4%.

[0107] The ultrasonic treatment in S032 of this embodiment is performed at an ultrasonic power of 350 W and for 2 h.

[0108] The preparation method of the boron nitride modifier of this embodiment is:

[0109] 5 parts by weight of boron nitride and 3 parts by weight of zirconium oxide were added to 8 parts by weight of yttrium nitrate solution, followed by adding 3 parts by weight of calcium titanate, blending thoroughly, then filtering and drying, and sintering at 180°C for 1 hour. After sintering, the mixture was ball-milled to 100 mesh to obtain a boron nitride modifier.

[0110] The mass fraction of the yttrium nitrate solution in this embodiment is 4%.

[0111] The preparation method of the coordination additive of this embodiment is:

[0112] S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is 4:1:7;

[0113] S102: 6 parts by weight of cordierite and 4 parts by weight of mica powder are blended and added to 8 parts by weight of sodium lignin sulfonate solution, followed by adding 2 parts by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution;

[0114] The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

[0115] The mass fraction of the barium nitrate solution in this embodiment is 5%; the mass fraction of the sodium lignin sulfonate solution is 8%; the ultrasonic power of the ultrasonic treatment is 500 W, and the ultrasonic treatment is performed for 1 hour.

[0116] The present embodiment provides an application of a production process of an alumina-magnesia spinel brick material in the preparation of alumina-magnesia spinel bricks.

[0117] Example 3

[0118] A production process of an alumina-magnesia spinel brick material of this embodiment includes the following steps:

[0119] Step 1: weigh the raw materials according to weight:

[0120] 32.5 parts of corundum, 10 parts of aluminum-magnesium spinel, 8 parts of added filler, 6.5 parts of coordination additive, 5.5 parts of magnesia powder, 4 parts of aluminum oxide, and 2 parts of binder;

[0121] Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour;

[0122] Step three, sintering the formed product for another 3 hours at a sintering temperature of 1550° C., and completing the sintering to obtain an alumina-magnesia spinel brick material.

[0123] In this embodiment, the particle size of the corundum is 0.55 mm; the particle size of the magnesia powder is 0.35 mm; the particle size of the aluminum oxide is 0.015 mm; the particle size of the aluminum magnesium spinel is 0.35 mm; and the binder is a pulp solution.

[0124] The preparation method of the added filler of this embodiment is:

[0125] S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry;

[0126] Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully blended in a weight ratio of 2.5:6:1 to obtain a sodium carboxymethyl cellulose solution;

[0127] S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution;

[0128] S03: Preparation of filler:

[0129] S031: 2.5 parts by weight of a boron nitride modifier and 2 parts by weight of a urea solution were mixed and added to 6.5 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution;

[0130] S032: 4 parts by weight of barium sulfate, 6.5 parts by weight of sodium dodecylbenzenesulfonate solution, and 2.5 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution;

[0131] The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler;

[0132] S04: The calcium sulfate whisker solution and the filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler.

[0133] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 4%; the mass fraction of the urea solution is 3%.

[0134] The ultrasonic treatment in S032 of this embodiment is performed at an ultrasonic power of 320 W and for 2 h.

[0135] The preparation method of the boron nitride modifier of this embodiment is:

[0136] 4 parts by weight of boron nitride and 2.5 parts by weight of zirconium oxide were added to 6.5 parts by weight of yttrium nitrate solution, followed by adding 2.5 parts by weight of calcium titanate, and the mixture was fully mixed. The mixture was then filtered and dried, and then sintered at 175°C for 1 hour. After sintering, the mixture was ball-milled to 100 mesh to obtain a boron nitride modifier.

[0137] The mass fraction of the yttrium nitrate solution in this embodiment is 3%.

[0138] The preparation method of the coordination additive of this embodiment is:

[0139] S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is 3:1:5.5;

[0140] S102: 5 parts by weight of cordierite and 3.5 parts by weight of mica powder are blended and added to 6.5 parts by weight of sodium lignin sulfonate solution, followed by adding 1.5 parts by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution;

[0141] The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

[0142] The mass fraction of the barium nitrate solution in this embodiment is 3.5%; the mass fraction of the sodium lignin sulfonate solution is 6.5%; the ultrasonic power of the ultrasonic treatment is 475W, and the ultrasonic treatment is performed for 1 hour.

[0143] The present embodiment provides an application of a production process of an alumina-magnesia spinel brick material in the preparation of alumina-magnesia spinel bricks.

[0144] Comparative Example 1

[0145] The difference from Example 3 is that no filler is added.

[0146] Comparative Example 2

[0147] The difference from Example 3 is that no calcium sulfate whisker solution is added in the preparation of the added filler.

[0148] Comparative Example 3

[0149] The difference from Example 3 is that no dry calcium sulfate whiskers were added to the calcium sulfate whisker liquid.

[0150] Comparative Example 4

[0151] The difference from Example 3 is that no filler is added during the preparation of the added filler.

[0152] Comparative Example 5.

[0153] The difference from Example 3 is that no retuning liquid is added to the filling material.

[0154] Comparative Example 6

[0155] The difference from Example 3 is that no boron nitride modifier is added to the reconstitution solution.

[0156] Comparative Example 7

[0157] The difference from Example 3 is that no barium sulfate solution is added to the reconstitution solution.

[0158] Comparative Example 8

[0159] The difference from Example 3 is that no coordinating additive is added.

[0160] Comparative Example 9

[0161] The difference from Example 3 is that no cordierite liquid is added to the coordination additive.

[0162] Comparative Example 10

[0163] The difference from Example 3 is that no cordierite or mica powder is added to the cordierite liquid.

[0164] Comparative Example 11

[0165] The difference from Example 3 is that no coordination liquid is added to the coordination additive.

[0166] Comparative Example 12

[0167] The difference from Example 3 is that no clay or titanium oxide is added to the coordination liquid.

[0168] The products of Examples 1-3 and Comparative Examples 1-12 were tested for apparent porosity, wear resistance, and compression resistance under normal conditions. Water resistance and thermal stability were also tested (the products were immersed in water for 24 hours, then placed at 110°C for 24 hours, and then placed at -5°C for 24 hours. The above constituted one cycle, and the cycle was repeated 10 times). The performance measurement results are as follows:

[0169]

[0170] From Examples 1-3 and Comparative Examples 1-12, it can be concluded that

[0171] The product of Example 3 of the present invention has excellent apparent porosity, wear resistance, and compression resistance under normal conditions, and has significant water resistance, cold and heat stability.

[0172] If the product does not contain any of the fillers or coordinating additives, the performance of the product will be significantly deteriorated. By using the two together, the performance of the product will be significantly improved.

[0173] The performance of the products showed varying degrees of deterioration when no calcium sulfate whisker liquid was added to the preparation of the added filler, no dried calcium sulfate whiskers were added to the calcium sulfate whisker liquid, no filler was added to the preparation of the added filler, no remixing liquid was added to the filler, no boron nitride modifier was added to the remixing liquid, and no barium sulfate liquid was added to the remixing liquid. Only the added filler prepared by combining the added filler obtained by the specific method of the present invention with the calcium sulfate whisker liquid showed the most significant performance effect. In addition, the performance of the product also showed a relatively obvious deterioration trend when no boron nitride modifier was added to the remixing liquid.

[0174] When cordierite liquid is not added to the coordination additive, cordierite and mica powder are not added to the cordierite liquid, the coordination liquid is not added to the coordination additive, and clay and titanium oxide are not added to the coordination liquid, the performance of the product tends to deteriorate. The coordination additive prepared by combining the cordierite liquid obtained by the method of the present invention with the coordination liquid has the most significant performance effect.

[0175] Boron nitride modifiers significantly change the performance of products, so further research is needed:

[0176] The preparation method of the boron nitride modifier is as follows:

[0177] 4 parts by weight of boron nitride and 2.5 parts by weight of zirconium oxide were added to 6.5 parts by weight of yttrium nitrate solution, followed by adding 2.5 parts by weight of calcium titanate, and the mixture was fully mixed. The mixture was then filtered and dried, and then sintered at 175°C for 1 hour. After sintering, the mixture was ball-milled to 100 mesh to obtain a boron nitride modifier.

[0178] The mass fraction of the yttrium nitrate solution in this embodiment is 3%.

[0179] Experimental Example 1

[0180] The same as Example 3, the only difference is that calcium titanate is not added in the preparation of the boron nitride modifier.

[0181] Experimental Example 2

[0182] The same as Example 3, except that zirconium oxide was not added in the preparation of the boron nitride modifier.

[0183] Experimental Example 3

[0184] The same as Example 3, the only difference is that no boron nitride is added in the preparation of the boron nitride modifier.

[0185] Experimental Example 4

[0186] The same as Example 3, the only difference is that the yttrium nitrate solution is replaced by water in the preparation of the boron nitride modifier.

[0187] The product performance tests of Experimental Examples 1-4 are as follows:

[0188]

[0189] It can be seen from Experimental Examples 1-4 that when boron nitride is not added in the preparation of the boron nitride modifier, the performance of the product deteriorates significantly. At the same time, when calcium titanate is not added, zirconium oxide is not added, and the yttrium nitrate solution is replaced by water in the preparation of the boron nitride modifier, the performance of the product tends to deteriorate to varying degrees. Therefore, the use of boron nitride in combination with the specific raw materials of the present invention, such as calcium titanate and zirconium oxide, has the most significant performance effect of the product, and the use of other methods instead is not as obvious as the effect of the present invention.

[0190] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0191] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A production process of alumina-magnesia spinel brick material, characterized in that: The following steps are involved: Step 1: weigh the raw materials according to weight: 30-35 parts of corundum, 8-12 parts of aluminum-magnesium spinel, 6-10 parts of added filler, 5-8 parts of coordination additive, 4-7 parts of magnesia powder, 3-5 parts of aluminum oxide, 1-3 parts of binder; Step 2: Mix the above raw materials thoroughly, and then perform molding at a molding pressure of 50 MPa for 1 hour; Step 3: sintering the formed product for 2-4 hours at a sintering temperature of 1500-1600°C. After sintering, the alumina-magnesia spinel brick material is obtained; The preparation method of the added filler is: S01: Stir the calcium sulfate whiskers thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash with water, filter and dry; Sodium carboxymethyl cellulose, 5% by mass lanthanum chloride solution and nano-silica sol are fully mixed in a weight ratio of (2-3): (5-7): 1 to obtain sodium carboxymethyl cellulose solution; S02: Stirring the dried calcium sulfate whiskers and sodium carboxymethyl cellulose solution in a weight ratio of 3:5 to obtain a calcium sulfate whisker solution; S03: Preparation of filler: S031: 2-3 parts by weight of a boron nitride modifier and 1-3 parts by weight of a urea solution are mixed and added to 5-8 parts by weight of a 5% dopamine hydrochloride solution, and stirred to obtain a polyvalent solution; S032: 3-5 parts by weight of barium sulfate, 5-8 parts by weight of sodium dodecylbenzenesulfonate solution, and 2-3 parts by weight of sodium alginate are mixed to obtain a barium sulfate solution; The reconstitution liquid and the barium sulfate solution were ultrasonically treated in a weight ratio of 4:3, and finally filtered and dried to obtain a filler; S04: Calcium sulfate whisker solution and filler are mixed and ball-milled in a weight ratio of 5:3 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the added filler; The preparation method of the boron nitride modifier is: 3-5 parts by weight of boron nitride and 2-3 parts by weight of zirconium oxide are added to 5-8 parts by weight of yttrium nitrate solution, followed by adding 2-3 parts by weight of calcium titanate, and the mixture is thoroughly mixed, filtered, dried, and sintered at 170-180° C. for 1 hour. After sintering, the mixture is ball-milled to 100 mesh to obtain a boron nitride modifier; The preparation method of the coordination additive is: S101: adding clay and titanium oxide to a barium nitrate solution and mixing thoroughly to obtain a coordinated solution; wherein the mass ratio of clay, titanium oxide, and barium nitrate solution is (2-4):1:(4-7); S102: 4-6 parts by weight of cordierite and 3-4 parts by weight of mica powder are blended and added to 5-8 parts by weight of sodium lignin sulfonate solution, followed by adding 1-2 parts by weight of silane coupling agent KH550, and blending thoroughly to obtain a cordierite solution; The cordierite liquid and the coordination liquid were ultrasonically treated in a weight ratio of 3:

5. After the ultrasonic treatment was completed, the coordination additive was filtered and dried to obtain the coordination additive.

2. The production process of alumina-magnesia spinel brick material according to claim 1, characterized in that: The particle size of the corundum is 0.5-0.6 mm; the particle size of the magnesia powder is 0.3-0.4 mm; the particle size of the alumina is 0.01-0.02 mm; the particle size of the alumina-magnesia spinel is 0.3-0.4 mm; and the binder is a pulp solution.

3. The production process of alumina-magnesia spinel brick material according to claim 1, characterized in that: The mass fraction of the sodium dodecylbenzenesulfonate solution is 3-5%; the mass fraction of the urea solution is 2-4%.

4. The production process of alumina-magnesia spinel brick material according to claim 1, characterized in that: The ultrasonic treatment in S032 is performed at an ultrasonic power of 300-350 W for 2 h.

5. The production process of alumina-magnesia spinel brick material according to claim 1, characterized in that: The mass fraction of the yttrium nitrate solution is 2-4%.

6. The production process of alumina-magnesia spinel brick material according to claim 1, characterized in that: The mass fraction of the barium nitrate solution is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 5-8%; the ultrasonic power of the ultrasonic treatment is 450-500W, and the ultrasonic treatment is performed for 1 hour.

7. Application of the production process of an alumina-magnesia spinel brick material according to any one of claims 1 to 6 in the preparation of alumina-magnesia spinel bricks.

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