Aluminum-magnesium-carbon brick material composition and preparation method thereof

Abstract

The present invention relates to the technical field of brick materials, and specifically to an aluminum-magnesium-carbon brick material composition and a preparation method thereof, comprising the following raw materials in parts by weight: 40-45 parts of corundum with a particle size of 2-3 mm, 8-14 parts of magnesia, 5-7 parts of aluminum oxide, 4-6 parts of graphite, 3-5 parts of phenolic resin, 4-7 parts of additives blended with modified fillers, and 3-5 parts of auxiliary agents. The aluminum-magnesium-carbon brick material composition of the present invention uses corundum, magnesia, aluminum oxide, and graphite as raw materials, and by adding phenolic resin as a bonding aid, the modified filler blended with additives and auxiliary agents are blended and coordinated to achieve synergistic effects. The obtained aluminum-magnesium-carbon brick material composition product has excellent apparent porosity, coordinated improvements in oxidation resistance and pressure resistance, and significant effects on the product's heat and cold resistance, wear resistance, and service life.

Description

Technical Field

[0001] The present invention relates to the technical field of brick materials, and in particular to an aluminum-magnesium-carbon brick material composition and a preparation method thereof. Background Art

[0002] Alumina-magnesia-carbon bricks are typical carbon composite refractory materials, widely used in the metallurgical industry, such as ladle baths and ladle bottoms. Alumina-magnesia-carbon bricks are carbon-containing refractory materials. Carbon oxidation is the primary cause of damage to carbon-containing refractory materials. This oxidation forms a decarburized layer, which creates a loose structure and enlarges pores, affecting the performance of carbon-containing refractory materials.

[0003] The existing aluminum-magnesium-carbon bricks have a high apparent porosity. In order to improve the apparent porosity performance, it is easy to lead to poor antioxidant and pressure resistance of the product. It is difficult to achieve coordinated improvement of apparent porosity, antioxidant and pressure resistance of the product. In addition, the product has poor resistance to cold and heat and wear resistance and service life, which further limits the product's utilization efficiency. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide an aluminum-magnesium-carbon brick material composition and a preparation method thereof to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] The present invention provides an aluminum-magnesium-carbon brick material composition, which comprises the following raw materials in parts by weight:

[0007] 40-45 parts of corundum with a particle size of 2-3 mm, 8-14 parts of magnesia, 5-7 parts of aluminum oxide, 4-6 parts of graphite, 3-5 parts of phenolic resin, 4-7 parts of modified filler-adjusted additives, and 3-5 parts of auxiliary agents; the preparation method of the modified filler-adjusted additives is as follows:

[0008] S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution;

[0009] Add 2 to 5 parts by weight of kaolin and 1 to 3 parts by weight of sodium dodecylbenzenesulfonate solution to 5 to 8 parts by weight of rare earth solution, then add 2 to 4 parts by weight of boron nitride, and stir thoroughly to obtain a modified solution;

[0010] S02: preheating potassium feldspar at 55-60°C for 1-1.5 hours, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed;

[0011] S03: Preparation of additives;

[0012] S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000-1200 r / min for 1-2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified filler-adjusted additive.

[0013] Preferably, the magnesia is a mixture of 1-2 mm magnesia, 0.5-0.7 mm magnesia and 0.02-0.05 mm magnesia in a weight ratio of (2-3):(2-3):1; the particle size of the alumina is 2-3 mm; and the particle size of the graphite is 1-2 mm.

[0014] Preferably, the mass fraction of the sodium silicate solution is 3-6%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 2-5%.

[0015] Preferably, the preparation method of the additive is:

[0016] S031: adding 2-5 parts by weight of mullite and 1-3 parts by weight of silane coupling agent KH550 to 5-8 parts by weight of 5-8% sodium lignin sulfonate solution and stirring thoroughly to obtain a first addition solution;

[0017] S032: 3-5 parts by weight of calcium sulfate whiskers, 2-4 parts by weight of hydroxyapatite, and 4-7 parts by weight of 4-5% urea solution are mixed to obtain a second additive solution;

[0018] S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent;

[0019] Preferably, the stirring speed of the stirring modification treatment in S02 is 550-750 r / min, and the stirring is 1-1.5 h; the ultrasonic power of the blending ultrasonic treatment in S033 is 350-400 W, and the ultrasonic treatment is 1-1.5 h.

[0020] The additives used in the modified filler blend are preheated potassium feldspar and then modified with a modifying solution. The kaolin in the modifying solution is combined with boron nitride, sodium dodecylbenzene sulfonate solution, and rare earth solution. Through the coordination and synergy between the raw materials, the synergistic effect of potassium feldspar in the system is enhanced. At the same time, the rare earth solution is blended with lanthanum oxide, dysprosium oxide, and sodium silicate solution. The synergistic effect between the raw materials further improves the performance of the product.

[0021] The first adjusting liquid is formed by blending mullite, silane coupling agent KH550 and sodium lignin sulfonate solution, and the second adjusting liquid is formed by blending calcium sulfate whiskers, hydroxyapatite and 4% by mass urea solution. By co-blending the first adjusting liquid and the second adjusting liquid and synergizing the raw materials, the modified filler-blended additives are coordinated and optimized in the system for product performance and improved for product performance stability.

[0022] Preferably, the preparation method of the adjuvant is:

[0023] S101: calcining talc at 210-220° C. for 1-2 hours, then cooling to 55-60° C. at a rate of 1-3° C. / min, and maintaining the temperature to obtain calcined talc;

[0024] S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0025] Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution;

[0026] S103: ball-milling the auxiliary agent and the calcined talc solution at a weight ratio of 3:5 at a ball-milling speed of 1200-1500 r / min for 1-2 hours, followed by suction filtration and drying to obtain the auxiliary agent.

[0027] Preferably, the pH value of the phosphate buffer solution is 5.0-5.5; and the mass fraction of the yttrium nitrate solution is 4-6%.

[0028] Preferably, the preparation method of the auxiliary agent is:

[0029] 4-6 parts by weight of basalt fiber and 2-3 parts by weight of nano-titanium dioxide are added to 5-8 parts by weight of 3-5% sodium citrate solution, and then 2-4 parts by weight of silicon carbide and 1-2 parts by weight of cerium oxide are added and stirred thoroughly. Finally, the mixture is filtered and dried to obtain an auxiliary agent.

[0030] The active performance of talc is optimized by thermal calcination, and then it is blended and formulated with sodium carboxymethyl cellulose, phosphate buffer solution and yttrium nitrate solution to optimize the dispersibility and interface properties of talc in the system. At the same time, the auxiliary agent is added with the needle-like structure of basalt fiber as the matrix, combined with nano-titanium dioxide, silicon carbide, cerium oxide and other raw materials. Through the mutual coordination and assistance between the raw materials, the synergistic effect of the auxiliary agent and the modified filler is further enhanced, thereby further improving the performance of the product.

[0031] The present invention also provides a method for preparing an aluminum-magnesium-carbon brick material composition, comprising the following steps:

[0032] The raw materials are weighed according to weight, mixed thoroughly, and then put into a mold for pressing at a pressure of 2200-2500 KN. After the pressing is completed, the raw materials are baked at 300-320° C. for 10-12 hours to obtain an aluminum-magnesium-carbon brick material composition.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The aluminum-magnesium-carbon brick material composition of the present invention adopts corundum, magnesia, alumina and graphite as raw materials, adds phenolic resin as a bonding aid, and coordinates and cooperates with the modified filler and the additives and auxiliary agents added to achieve synergistic effects. The obtained aluminum-magnesium-carbon brick material composition product has excellent apparent porosity, coordinated improvement of oxidation resistance and pressure resistance, and significant effects on the product's heat and cold resistance and wear resistance and service life. DETAILED DESCRIPTION

[0035] 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.

[0036] The aluminum-magnesium-carbon brick material composition of this embodiment includes the following raw materials in parts by weight:

[0037] 40-45 parts of corundum with a particle size of 2-3 mm, 8-14 parts of magnesia, 5-7 parts of alumina, 4-6 parts of graphite, 3-5 parts of phenolic resin, 4-7 parts of additives blended with modified fillers, and 3-5 parts of auxiliary agents.

[0038] The magnesia of this embodiment is prepared by compounding 1-2 mm magnesia, 0.5-0.7 mm magnesia and 0.02-0.05 mm magnesia in a weight ratio of (2-3):(2-3):1; the particle size of the alumina is 2-3 mm; and the particle size of the graphite is 1-2 mm.

[0039] The preparation method of the modified filler-adjusted additive of this embodiment is:

[0040] S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution;

[0041] Add 2 to 5 parts by weight of kaolin and 1 to 3 parts by weight of sodium dodecylbenzenesulfonate solution to 5 to 8 parts by weight of rare earth solution, then add 2 to 4 parts by weight of boron nitride, and stir thoroughly to obtain a modified solution;

[0042] S02: preheating potassium feldspar at 55-60°C for 1-1.5 hours, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed;

[0043] S03: Preparation of additives;

[0044] S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000-1200 r / min for 1-2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified filler-adjusted additive.

[0045] The mass fraction of the sodium silicate solution in this embodiment is 3-6%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 2-5%.

[0046] The preparation method of the additive of this embodiment is:

[0047] S031: adding 2-5 parts by weight of mullite and 1-3 parts by weight of silane coupling agent KH550 to 5-8 parts by weight of 5-8% sodium lignin sulfonate solution and stirring thoroughly to obtain a first addition solution;

[0048] S032: 3-5 parts by weight of calcium sulfate whiskers, 2-4 parts by weight of hydroxyapatite, and 4-7 parts by weight of 4-5% urea solution are mixed to obtain a second additive solution;

[0049] S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent;

[0050] In S02 of this embodiment, the stirring speed of the stirring modification treatment is 550-750 r / min, and the stirring is performed for 1-1.5 hours. In S033, the ultrasonic power of the blending ultrasonic treatment is 350-400 W, and the ultrasonic treatment is performed for 1-1.5 hours.

[0051] The preparation method of the adjuvant of this embodiment is:

[0052] S101: calcining talc at 210-220° C. for 1-2 hours, then cooling to 55-60° C. at a rate of 1-3° C. / min, and maintaining the temperature to obtain calcined talc;

[0053] S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0054] Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution;

[0055] S103: ball-milling the auxiliary agent and the calcined talc solution at a weight ratio of 3:5 at a ball-milling speed of 1200-1500 r / min for 1-2 hours, followed by suction filtration and drying to obtain the auxiliary agent.

[0056] The pH value of the phosphate buffer solution in this embodiment is 5.0-5.5; the mass fraction of the yttrium nitrate solution is 4-6%.

[0057] The preparation method of the auxiliary agent of this embodiment is:

[0058] 4-6 parts by weight of basalt fiber and 2-3 parts by weight of nano-titanium dioxide are added to 5-8 parts by weight of 3-5% sodium citrate solution, and then 2-4 parts by weight of silicon carbide and 1-2 parts by weight of cerium oxide are added and stirred thoroughly. Finally, the mixture is filtered and dried to obtain an auxiliary agent.

[0059] The preparation method of an aluminum-magnesium-carbon brick material composition of this embodiment includes the following steps:

[0060] The raw materials are weighed according to weight, mixed thoroughly, and then put into a mold for pressing at a pressure of 2200-2500 KN. After the pressing is completed, the raw materials are baked at 300-320° C. for 10-12 hours to obtain an aluminum-magnesium-carbon brick material composition.

[0061] Example 1.

[0062] The aluminum-magnesium-carbon brick material composition of this embodiment includes the following raw materials in parts by weight:

[0063] 40 parts of corundum with a particle size of 2mm, 8 parts of magnesia, 5 parts of aluminum oxide, 4 parts of graphite, 3 parts of phenolic resin, 4 parts of additives blended with modified fillers, and 3 parts of auxiliary agents.

[0064] The magnesia in this embodiment is prepared by compounding 1 mm magnesia, 0.5 mm magnesia and 0.02 mm magnesia in a weight ratio of 2:2:1; the particle size of the alumina is 2 mm; and the particle size of the graphite is 1 mm.

[0065] The preparation method of the modified filler-adjusted additive of this embodiment is:

[0066] S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution;

[0067] 2 parts by weight of kaolin and 1 part by weight of sodium dodecylbenzenesulfonate solution were added to 5 parts by weight of rare earth solution, followed by adding 2 parts by weight of boron nitride and stirring thoroughly to obtain a modified solution;

[0068] S02: preheating potassium feldspar at 55°C for 1 hour, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed;

[0069] S03: Preparation of additives;

[0070] S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000 r / min for 1 hour. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified filler-adjusted additive.

[0071] The mass fraction of the sodium silicate solution in this embodiment is 3%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 2%.

[0072] The preparation method of the additive of this embodiment is:

[0073] S031: Add 2 parts by weight of mullite and 1 part by weight of silane coupling agent KH550 to 5 parts by weight of 5% sodium lignin sulfonate solution and stir thoroughly to obtain a first additive solution;

[0074] S032: 3 parts by weight of calcium sulfate whiskers, 2 parts by weight of hydroxyapatite, and 4 parts by weight of 4% urea solution are mixed to obtain a second additive solution;

[0075] S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent;

[0076] In S02 of this embodiment, the stirring speed of the stirring modification treatment is 550 r / min, and the stirring is performed for 1 hour. In S033, the ultrasonic power of the blending ultrasonic treatment is 350 W, and the ultrasonic treatment is performed for 1 hour.

[0077] The preparation method of the adjuvant of this embodiment is:

[0078] S101: calcining talc at 210°C for 1 hour, then cooling to 55°C at a rate of 1°C / min, and maintaining the temperature to obtain calcined talc;

[0079] S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0080] Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution;

[0081] S103: ball-milling the auxiliary agent and the calcined talc solution at a weight ratio of 3:5 at a ball-milling speed of 1200 r / min for 1 hour, followed by suction filtration and drying to obtain the auxiliary agent.

[0082] The pH value of the phosphate buffer solution in this embodiment is 5.0; the mass fraction of the yttrium nitrate solution is 4%.

[0083] The preparation method of the auxiliary agent of this embodiment is:

[0084] 4 parts by weight of basalt fiber and 2 parts by weight of nano-titanium dioxide are added to 5 parts by weight of 3% sodium citrate solution, and then 2 parts by weight of silicon carbide and 1 part by weight of cerium oxide are added and stirred thoroughly. Finally, the mixture is filtered and dried to obtain an auxiliary agent.

[0085] The preparation method of an aluminum-magnesium-carbon brick material composition of this embodiment includes the following steps:

[0086] The raw materials were weighed according to weight, mixed thoroughly, and then put into a mold for pressing and forming at a pressing pressure of 2200 KN. After the pressing was completed, the materials were baked at 300° C. for 10 hours to obtain an aluminum-magnesium-carbon brick material composition.

[0087] Example 2.

[0088] The aluminum-magnesium-carbon brick material composition of this embodiment includes the following raw materials in parts by weight:

[0089] 45 parts of corundum with a particle size of 3mm, 14 parts of magnesia, 7 parts of aluminum oxide, 6 parts of graphite, 5 parts of phenolic resin, 7 parts of additives blended with modified fillers, and 5 parts of auxiliary agents.

[0090] The magnesia in this embodiment is prepared by compounding 2 mm magnesia, 0.7 mm magnesia and 0.05 mm magnesia in a weight ratio of 3:3:1; the particle size of the aluminum oxide is 3 mm; and the particle size of the graphite is 2 mm.

[0091] The preparation method of the modified filler-adjusted additive of this embodiment is:

[0092] S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution;

[0093] 5 parts by weight of kaolin and 3 parts by weight of sodium dodecylbenzenesulfonate solution were added to 8 parts by weight of rare earth solution, followed by adding 4 parts by weight of boron nitride and stirring thoroughly to obtain a modified solution;

[0094] S02: preheating potassium feldspar at 60°C for 1.5 hours, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed;

[0095] S03: Preparation of additives;

[0096] S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1200 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified filler-adjusted additive.

[0097] The mass fraction of the sodium silicate solution in this embodiment is 6%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 5%.

[0098] The preparation method of the additive of this embodiment is:

[0099] S031: 5 parts by weight of mullite and 3 parts by weight of silane coupling agent KH550 are added to 8 parts by weight of 8% sodium lignin sulfonate solution and stirred thoroughly to obtain a first additive solution;

[0100] S032: 5 parts by weight of calcium sulfate whiskers, 4 parts by weight of hydroxyapatite, and 7 parts by weight of 5% urea solution are mixed to obtain a second additive solution;

[0101] S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent;

[0102] In S02 of this embodiment, the stirring speed of the stirring modification treatment is 750 r / min, and the stirring is performed for 1.5 hours. In S033, the ultrasonic power of the blending ultrasonic treatment is 400 W, and the ultrasonic treatment is performed for 1.5 hours.

[0103] The preparation method of the adjuvant of this embodiment is:

[0104] S101: calcining talc at 220°C for 2 hours, then cooling to 60°C at a rate of 3°C / min, and keeping the temperature to obtain calcined talc;

[0105] S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0106] Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution;

[0107] S103: ball-milling the auxiliary agent and the calcined talc solution at a weight ratio of 3:5 at a ball-milling speed of 1500 r / min for 2 h, followed by suction filtration and drying to obtain the auxiliary agent.

[0108] The pH value of the phosphate buffer solution in this embodiment is 5.5; the mass fraction of the yttrium nitrate solution is 6%.

[0109] The preparation method of the auxiliary agent of this embodiment is:

[0110] 6 parts by weight of basalt fiber and 3 parts by weight of nano-titanium dioxide were added to 8 parts by weight of 5% sodium citrate solution, and then 4 parts by weight of silicon carbide and 2 parts by weight of cerium oxide were added and stirred thoroughly. Finally, the mixture was filtered and dried to obtain an auxiliary agent.

[0111] The preparation method of an aluminum-magnesium-carbon brick material composition of this embodiment includes the following steps:

[0112] The raw materials were weighed according to weight, mixed thoroughly, and then put into a mold for pressing and molding at a pressing pressure of 2500 KN. After the pressing was completed, the materials were baked at 320° C. for 12 hours to obtain an aluminum-magnesium-carbon brick material composition.

[0113] Example 3.

[0114] The aluminum-magnesium-carbon brick material composition of this embodiment includes the following raw materials in parts by weight:

[0115] 42.5 parts of corundum with a particle size of 2.5 mm, 11 parts of magnesia, 6 parts of aluminum oxide, 5 parts of graphite, 4 parts of phenolic resin, 5.5 parts of additives blended with modified fillers, and 4 parts of auxiliary agents.

[0116] The magnesia in this embodiment is a mixture of 1.5 mm magnesia, 0.6 mm magnesia and 0.035 mm magnesia in a weight ratio of 2.5:2.5:1; the particle size of the alumina is 2.5 mm; and the particle size of the graphite is 1.5 mm.

[0117] The preparation method of the modified filler-adjusted additive of this embodiment is:

[0118] S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution;

[0119] 3.5 parts by weight of kaolin and 2 parts by weight of sodium dodecylbenzenesulfonate solution were added to 6.5 parts by weight of rare earth solution, followed by adding 3 parts by weight of boron nitride and stirring thoroughly to obtain a modified solution;

[0120] S02: preheating potassium feldspar at 57.5°C for 1.25h, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed;

[0121] S03: Preparation of additives;

[0122] S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1100 r / min for 1.5 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified filler-blended additive.

[0123] The mass fraction of the sodium silicate solution in this embodiment is 4.5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 3.5%.

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

[0125] S031: 3.5 parts by weight of mullite and 2 parts by weight of silane coupling agent KH550 were added to 6.5 parts by weight of 6.5% sodium lignin sulfonate solution and stirred thoroughly to obtain a first additive solution;

[0126] S032: 4 parts by weight of calcium sulfate whiskers, 3 parts by weight of hydroxyapatite, and 5.5 parts by weight of a 4.5% urea solution are thoroughly blended to obtain a second additive solution;

[0127] S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent;

[0128] The stirring speed of the stirring modification treatment in S02 of this embodiment is 600 r / min, and the stirring is performed for 1.25 h. The ultrasonic power of the blending ultrasonic treatment in S033 is 375 W, and the ultrasonic treatment is performed for 1.25 h.

[0129] The preparation method of the adjuvant of this embodiment is:

[0130] S101: calcining talc at 215°C for 1.5 hours, then cooling to 57.5°C at a rate of 2°C / min, and maintaining the temperature to obtain calcined talc;

[0131] S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution;

[0132] Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution;

[0133] S103: ball-milling the auxiliary agent and the calcined talc solution at a weight ratio of 3:5 at a ball-milling speed of 1350 r / min for 1.5 h, followed by suction filtration and drying to obtain the auxiliary agent.

[0134] The pH value of the phosphate buffer solution in this embodiment is 5.2; the mass fraction of the yttrium nitrate solution is 5%.

[0135] The preparation method of the auxiliary agent of this embodiment is:

[0136] 5 parts by weight of basalt fiber and 2.5 parts by weight of nano-titanium dioxide were added to 6.5 parts by weight of 4% sodium citrate solution, and then 3 parts by weight of silicon carbide and 1.5 parts by weight of cerium oxide were added and stirred thoroughly. Finally, the mixture was filtered and dried to obtain an auxiliary agent.

[0137] The preparation method of an aluminum-magnesium-carbon brick material composition of this embodiment includes the following steps:

[0138] The raw materials were weighed according to weight, mixed thoroughly, and then put into a mold for pressing and molding at a pressing pressure of 2350 KN. After the pressing was completed, the mixture was baked at 310° C. for 11 hours to obtain an aluminum-magnesium-carbon brick material composition.

[0139] Comparative Example 1.

[0140] The difference from Example 3 is that no modified filler blending additives are added.

[0141] Comparative Example 2.

[0142] The difference from Example 3 is that modified potassium feldspar is not added in the preparation of the additive for blending the modified filler.

[0143] Comparative Example 3.

[0144] The difference from Example 3 is that no modifying liquid is added during the preparation of the modified potassium feldspar.

[0145] Comparative Example 4.

[0146] The difference from Example 3 is that kaolin and boron nitride are not added to the modified solution.

[0147] Comparative Example 5.

[0148] The difference from Example 3 is that no rare earth solution is added to the modified solution.

[0149] Comparative Example 6.

[0150] The difference from Example 3 is that no additives are added in the preparation of the additives for blending the modified filler.

[0151] Comparative Example 7.

[0152] The difference from Example 3 is that the first adjusting liquid is not added during the preparation of the adjusting agent.

[0153] Comparative Example 8.

[0154] The difference from Example 3 is that no second adjusting liquid is added during the preparation of the adjusting agent.

[0155] Comparative Example 9.

[0156] The difference from Example 3 is that no auxiliary agent is added.

[0157] Comparative Example 10.

[0158] The difference from Example 3 is that no calcined talc solution is added to the adjuvant.

[0159] Comparative Example 11.

[0160] The difference from Example 3 is that no auxiliary agent is added to the auxiliary agent.

[0161] Comparative Example 12.

[0162] The difference from Example 3 is that no rock fiber and nano-titanium dioxide are added to the auxiliary agent.

[0163] Comparative Example 13.

[0164] The difference from Example 3 is that silicon carbide and cerium oxide are not added to the auxiliary agent.

[0165] Conventional tests were conducted to test the apparent porosity, oxidation resistance (the products were prepared into 25 mm × 25 mm × 150 mm specimens, heated to 1500° C. and kept warm for 30 minutes, then the specimens were removed, cooled, and cut open. The thickness of the decarburized layer on the cross section was measured to evaluate the oxidation resistance of the specimens) and compressive strength of Examples 1 to 3 and Comparative Examples 1 to 13. The performance tests are shown in Table 1 below. Table 1 shows the apparent porosity, oxidation resistance, and compressive strength performance test table under conventional conditions.

[0166] Table 1

[0167] Apparent porosity (%) Compressive strength (MPa) Decarburized layer thickness (mm) Example 1 1.3 58.7 1.4 Example 2 1.1 59.3 1.2 Example 3 1.0 59.6 1.0 Comparative Example 1 3.8 48.7 3.4 Comparative Example 2 3.3 50.2 3.0 Comparative Example 3 3.0 51.5 2.7 Comparative Example 4 2.6 53.2 2.2 Comparative Example 5 2.4 52.5 2.5 Comparative Example 6 3.4 50.0 3.1 Comparative Example 7 2.8 52.8 2.8 Comparative Example 8 2.9 51.5 2.4 Comparative Example 9 3.5 49.7 3.1 Comparative Example 10 3.1 51.3 2.6 Comparative Example 11 3.0 51.0 2.7 Comparative Example 12 2.7 52.4 2.3 Comparative Example 13 2.3 53.2 2.0

[0168] It can be seen from Comparative Examples 1 to 13 and Examples 1 to 3 that;

[0169] The product of Example 3 has excellent apparent porosity, and at the same time, the product has excellent compressive strength and antioxidant properties, and the performance of the product can be improved in a coordinated manner.

[0170] The product was then placed at 70°C for 24 hours and then at -5°C for 12 hours. The above is one cycle. After 10 cycles, the product was rubbed 20 times with a load of 10N to test its heat and cold resistance and wear resistance. The performance test is shown in Table 2 below. Table 2 shows the porosity, oxidation resistance and compressive strength performance test under heat and cold resistance and wear resistance conditions.

[0171] Table 2

[0172] Apparent porosity (%) Compressive strength (MPa) Decarburized layer thickness (mm) Example 1 1.5 58.2 1.6 Example 2 1.3 58.6 1.4 Example 3 1.2 59.0 1.2 Comparative Example 1 8.5 32.3 7.9 Comparative Example 2 8.0 35.5 7.2 Comparative Example 3 7.2 36.6 6.3 Comparative Example 4 6.4 38.2 5.7 Comparative Example 5 7.0 37.2 6.1 Comparative Example 6 7.7 34.3 7.5 Comparative Example 7 6.8 36.8 6.8 Comparative Example 8 6.2 38.7 6.2 Comparative Example 9 8.1 34.1 7.5 Comparative Example 10 7.2 36.2 7.0 Comparative Example 11 7.4 36.0 6.8 Comparative Example 12 6.7 38.5 6.1 Comparative Example 13 5.3 41.2 5.7

[0173] From Comparative Examples 1 to 13 and Example 3, it can be seen that the product of Example 3 has excellent performance stability under hot and cold and wear conditions;

[0174] The performance of the product showed a significant deterioration trend when the additives of modified fillers and auxiliary agents were not added to the product. Only when the raw materials of the present invention were used to blend and work together, the product's performance stability was the best.

[0175] As can be seen from Comparative Examples 1 to 3 and Example 3, the performance of the products of the modified filler blended additives without adding modified potassium feldspar, without adding modifying liquid, without adding kaolin and boron nitride to the modifying liquid, without adding rare earth liquid to the modifying liquid, without adding an additive to the modified filler blended additives, without adding the first additive to the additives, and without adding the second additive to the additives, all have varying degrees of deterioration trends. The modified potassium feldspar improved by the additive obtained by the specific method of the present invention and the modified filler blended additive prepared by the method of the present invention have the most significant performance effects, and the technical effects of the present invention cannot be achieved by using other methods instead.

[0176] When calcined talc liquid is not added to the auxiliary agent, no auxiliary adjuster is added to the auxiliary agent, Wuyan fiber, nano titanium dioxide, silicon carbide and cerium oxide are not added to the auxiliary adjuster, the performance of the product tends to deteriorate to varying degrees. The performance effect of the product is most significant when the auxiliary adjuster obtained by the specific method of the present invention is combined with the calcined talc liquid of the present invention.

[0177] 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.

[0178] 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. An aluminum-magnesia-carbon brick material composition, characterized in that: The aluminum-magnesia-carbon brick material composition comprises the following raw materials in parts by weight: 40-45 parts of corundum with a particle size of 2-3 mm, 8-14 parts of magnesia, 5-7 parts of aluminum oxide, 4-6 parts of graphite, 3-5 parts of phenolic resin, 4-7 parts of modified filler-blended additives, and 3-5 parts of auxiliary agents; the preparation method of the modified filler-blended additives is as follows: S01: mixing lanthanum oxide, dysprosium oxide and sodium silicate solution in a weight ratio of 2:2:5 to obtain a rare earth solution; Add 2 to 5 parts by weight of kaolin and 1 to 3 parts by weight of sodium dodecylbenzenesulfonate solution to 5 to 8 parts by weight of rare earth solution, then add 2 to 4 parts by weight of boron nitride, and stir thoroughly to obtain a modified solution; S02: preheating potassium feldspar at 55-60°C for 1-1.5 hours, adding the preheated potassium feldspar to the modification liquid at a weight ratio of 2:5, stirring and modifying the mixture, and obtaining modified potassium feldspar after the stirring is completed; S03: Preparation of additives; S04: The modified potassium feldspar and the additive are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000-1200 r / min for 1-2 hours. After the ball milling is completed, the mixture is filtered and dried to obtain the modified filler-adjusted additive; The preparation method of the additive is as follows: S031: adding 2 to 5 parts by weight of mullite and 1 to 3 parts by weight of silane coupling agent KH550 to 5 to 8 parts by weight of 5 to 8% sodium lignin sulfonate solution and stirring thoroughly to obtain a first additive solution; S032: 3-5 parts by weight of calcium sulfate whiskers, 2-4 parts by weight of hydroxyapatite, and 4-7 parts by weight of 4-5% urea solution are fully blended to obtain a second additive solution; S033: The first adjusting liquid and the second adjusting liquid are mixed in a weight ratio of 5:3, subjected to ultrasonic treatment, and then filtered and dried to obtain an adjusting agent.

2. The aluminum-magnesia-carbon brick material composition according to claim 1, characterized in that: The magnesia is prepared by compounding 1-2 mm magnesia, 0.5-0.7 mm magnesia and 0.02-0.05 mm magnesia in a weight ratio of (2-3):(2-3):1; the particle size of the alumina is 2-3 mm; and the particle size of the graphite is 1-2 mm.

3. The aluminum-magnesia-carbon brick material composition according to claim 1, characterized in that: The mass fraction of the sodium silicate solution is 3-6%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 2-5%.

4. The aluminum-magnesia-carbon brick material composition according to claim 1, characterized in that: The stirring speed of the stirring modification treatment in S02 is 550-750 r / min, and the stirring is performed for 1-1.5 hours. The ultrasonic power of the blending ultrasonic treatment in S033 is 350-400 W, and the ultrasonic treatment is performed for 1-1.5 hours.

5. The aluminum-magnesia-carbon brick material composition according to claim 1, characterized in that: The preparation method of the adjuvant is: S101: calcining talc at 210-220° C. for 1-2 hours, then cooling to 55-60° C. at a rate of 1-3° C. / min, and maintaining the temperature to obtain calcined talc; S102: mixing sodium carboxymethyl cellulose, phosphate buffer solution, and yttrium nitrate solution in a weight ratio of 2:5:1 to obtain a sodium carboxymethyl cellulose solution; Calcined talc powder and sodium carboxymethyl cellulose solution are stirred thoroughly in a weight ratio of 2:5 to obtain calcined talc solution; S103: ball milling the auxiliary agent and calcined talc in a weight ratio of 3:5 at a ball milling speed of 1200-1500 r / min for 1-2 hours, followed by suction filtration and drying to obtain the auxiliary agent; the preparation method of the auxiliary agent is as follows: 4-6 parts by weight of basalt fiber and 2-3 parts by weight of nano-titanium dioxide are added to 5-8 parts by weight of 3-5% sodium citrate solution, and then 2-4 parts by weight of silicon carbide and 1-2 parts by weight of cerium oxide are added and stirred thoroughly, and finally filtered and dried to obtain an auxiliary agent.

6. The aluminum-magnesia-carbon brick material composition according to claim 5, characterized in that: The pH value of the phosphate buffer solution is 5.0-5.5; the mass fraction of the yttrium nitrate solution is 4-6%.

7. The method for preparing an aluminum-magnesium-carbon brick material composition according to any one of claims 1 to 6, characterized in that: The following steps are involved: The raw materials are weighed according to weight, mixed thoroughly, and then put into a mold for pressing at a pressure of 2200 to 2500 kN. After the pressing is completed, the raw materials are baked at 300 to 320° C. for 10 to 12 hours to obtain an aluminum-magnesium-carbon brick material composition.