A special low-carbon refractory quartz dry vibration material and its preparation method

Abstract

The present invention discloses a special low-carbon refractory quartz dry vibration material and a preparation method thereof, relating to the field of refractory materials technology. The special low-carbon refractory quartz dry vibration material comprises the following components by weight: 70-80 parts of quartz aggregate, 20-30 parts of zirconium oxide-coated corundum powder, 3-6 parts of aluminum dihydrogen phosphate, 0.5-1 parts of lithium borate, and 0.5-1 parts of yttrium oxide. The preparation method comprises adding quartz aggregate, zirconium oxide-coated corundum powder, aluminum dihydrogen phosphate, lithium borate, and yttrium oxide to a mixer and stirring evenly to obtain the obtained material. The quartz dry vibration material prepared by the present invention has good resistance to thermal vibration cycles and low carbon content, and is environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of refractory materials, in particular to a special low-carbon refractory quartz dry vibration material and a preparation method thereof. Background Art

[0002] Refractory materials play a vital role in high-temperature industries such as metallurgy, glass, and ceramics. Quartz dry vibrating material, in particular, is widely used in thermal equipment such as induction furnace linings and ladle linings due to its high refractoriness, good chemical stability, and low cost. Quartz dry vibrating material primarily uses quartz as the aggregate, combined with binders and additives. Through vibration compaction, it forms a working lining with a certain strength and corrosion resistance.

[0003] However, quartz dry vibration materials face serious challenges in thermal shock stability during practical use. Quartz crystals exist in various crystalline forms, and upon heating, they undergo a reversible phase transition from β-quartz to α-quartz, accompanied by volume expansion and contraction. Frequent heating and cooling cycles during high-temperature equipment operation subject quartz dry vibration materials to repeated volume changes. Repeated thermal shock cycles cause microscopic stress concentrations within the quartz particles. As the number of thermal shocks increases, these stress concentrations gradually develop into cracks and continue to expand. These cracks can not only cause surface flaking but, in severe cases, even complete material cracking, significantly reducing the service life of quartz dry vibration materials and limiting their ability to withstand thermal cycles far below actual industrial requirements. Furthermore, with the increasing adoption of low-carbon and environmentally friendly concepts in industrial production, the carbon introduced into traditional quartz dry vibration materials during the preparation process, such as through binders and additives, can react with the oxidizing atmosphere within the furnace at high temperatures, leading to structural degradation and environmental pollution. Summary of the Invention

[0004] The present invention aims to provide a special low-carbon refractory quartz dry vibration material and its preparation method to address the technical problems of prior art quartz dry vibration materials, such as poor thermal vibration cycle resistance and environmental concerns, as discussed above. The quartz dry vibration material prepared by the present invention exhibits excellent thermal vibration cycle resistance and a low carbon content, making it environmentally friendly.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0007] 70-80 parts of quartz aggregate, 20-30 parts of zirconia-coated corundum powder, 3-6 parts of aluminum dihydrogen phosphate, 0.5-1 part of lithium borate, and 0.5-1 part of yttrium oxide.

[0008] In the technical solution of the present invention, quartz aggregate is used as the matrix material to provide the main high-temperature resistant skeleton. In addition, its raw material cost has a significant advantage over other raw materials, making it suitable as the main component of the dry vibration material. Corundum (α-Al2O3) serves as the core reinforcing phase in the dry vibration material. Its high melting point and angular particles constitute a high-temperature rigid skeleton, which is embedded in the gaps between the quartz aggregate to increase its volume density and room-temperature compressive strength. Aluminum dihydrogen phosphate serves as a binder in the dry vibration material, which improves the finishing strength of the material and reduces the porosity of the material through chemical reactions. Lithium borate serves as a low-temperature co-solvent, which significantly reduces the sintering temperature of the material, plays a role in energy conservation and consumption reduction, and reduces the production cost of the enterprise. In addition, the dry vibration material formula of the present invention has a low carbon content, is green and environmentally friendly, and will not cause pollution to the environment.

[0009] As a priority, the quartz aggregate particle size is divided into two types: 0.1-1.0 mm and 1.5-5.0 mm, and the mass ratio of the two is 1:2.

[0010] Preferably, the method for preparing the zirconium oxide-coated corundum powder comprises the following steps:

[0011] S1. dissolving zirconium oxychloride in deionized water, and then adding acetic acid as a hydrolysis inhibitor to obtain a zirconium oxychloride solution;

[0012] S2, adding polymethyl methacrylate microspheres to an aqueous solution of polyvinyl pyrrolidone, and uniformly dispersing the microspheres by ultrasonic oscillation to obtain a polymethyl methacrylate microsphere suspension;

[0013] S3, adding the polymethyl methacrylate microsphere suspension to the zirconium oxychloride solution, stirring and dispersing the mixture evenly to obtain a coating solution;

[0014] S4, add the corundum powder to the coating solution, slowly add ammonia solution under heating and stirring conditions, control the pH to 4-4.5, and make Zr 4+ It is gradually hydrolyzed into Zr(OH)4 colloid and uniformly deposited on the surface of the corundum particles. After aging for 12 hours, it is filtered, washed with water and dried to obtain primary zirconia-coated corundum micropowder.

[0015] S5. The nascent zirconia-coated corundum micropowder is placed in a muffle furnace and calcined to obtain the zirconia-coated corundum micropowder.

[0016] In the technical solution of the present invention, the volume expansion and contraction of quartz crystals during phase transitions results in poor thermal shock cycling resistance in dry vibration materials. To address this technical problem, the present invention coats and modifies jade. First, zirconium oxide is coated on the surface of corundum particles. Zr(OH)4 colloid is uniformly deposited on the corundum surface under alkaline conditions. After calcination, a dense ZrO2 coating is formed. This coating actively absorbs thermal shock stress while the corundum core provides high-temperature structural stability, initially improving the material's thermal shock cycling resistance. Second, polymethyl methacrylate microspheres are used as a pore-forming template. After co-deposition with Zr(OH)4, they decompose during the calcination stage, leaving a uniform closed-pore structure in the coating. This structure induces bifurcation and energy dissipation during crack propagation, extending the crack path. Furthermore, the pores buffer the thermal expansion difference between quartz and corundum, reducing interfacial stress concentration. Through these effects, the thermal shock cycling resistance of the dry vibration material is significantly improved.

[0017] Preferably, in step S2, the particle size of the polymethyl methacrylate microspheres is 0.1-0.3 μm.

[0018] Preferably, in step S2, the amount of polymethyl methacrylate microspheres used is 1.5-5 wt% of the mass of zirconium oxychloride.

[0019] Preferably, in step S4, the mass ratio of corundum powder to zirconium oxychloride is 10:2-4.

[0020] In the technical solution of the present invention, as described above, the thermal shock cycle resistance of the corundum micropowder is improved by coating the surface of the corundum micropowder with zirconium oxide. To achieve good thermal shock cycle resistance, the surface of the corundum micropowder must be coated with a sufficient amount of zirconium oxide. Therefore, the present invention controls the mass ratio of corundum micropowder to zirconium oxychloride to be less than 10 / 2. As the amount of zirconium oxychloride continues to increase, that is, when the mass ratio of corundum micropowder to zirconium oxychloride is less than 10 / 4, the present invention team unexpectedly discovered that the thermal conductivity of the material suddenly dropped significantly. The decline in thermal conductivity will cause slow heat transfer inside and outside the material, and heat cannot be quickly transferred to the material, requiring extended heating time or increased furnace temperature, which greatly increases energy consumption. After research, it was found that this is because the thermal conductivity of the zirconium oxide coating is low, forming an interfacial thermal barrier, thereby causing the overall thermal conductivity of the coated particles to decrease. Therefore. The present invention strictly controls the mass ratio of corundum micropowder to zirconium oxychloride to 10:2-4, balancing the thermal shock cycle resistance and thermal conductivity of the dry vibration material.

[0021] Preferably, in step S5, the calcination temperature is 1100-1150° C., and the calcination time is 1-2 hours.

[0022] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0023] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer and stir evenly to obtain the product.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Quartz aggregate is used as the matrix material to prepare a special low-carbon refractory quartz dry vibration material. Quartz aggregate has a significant cost advantage over other raw materials, making it suitable as the main component of the dry vibration material and effectively reducing production costs. At the same time, corundum, as the core reinforcement phase, forms a high-temperature rigid skeleton with its high melting point and angular particles. This is embedded in the gaps between the quartz aggregate, significantly increasing the bulk density and room-temperature compressive strength of the dry vibration material. This achieves the dual effects of cost optimization and strength enhancement while ensuring performance.

[0026] 2. To address the problem of poor thermal shock cycling resistance in dry vibration materials caused by quartz crystal phase transitions, the present invention modifies corundum micropowder by coating it with zirconium oxide. On the one hand, the zirconium oxide coating actively absorbs thermal shock stress, while the corundum core provides high-temperature structural stability. On the other hand, using polymethyl methacrylate microspheres as a pore-forming template, a uniform closed-pore structure is formed in the coating, inducing crack bifurcation to dissipate energy, extending the crack path, and buffering the thermal expansion difference between quartz and corundum. This significantly improves the dry vibration material's thermal shock cycling resistance, enabling it to better adapt to changes in high-temperature environments.

[0027] 3. Control the mass ratio of corundum powder and zirconium oxychloride within the specified range to balance the thermal vibration cycle resistance and thermal conductivity of the dry vibration material. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0031] 78 parts of quartz aggregate, 27 parts of zirconium oxide coated corundum powder, 5 parts of aluminum dihydrogen phosphate, 0.9 parts of lithium borate, and 0.8 parts of yttrium oxide. The quartz aggregate has two particle sizes: 0.1-1.0 mm and 1.5-5.0 mm, with a mass ratio of 1:2.

[0032] The preparation method of zirconium oxide coated corundum powder comprises the following steps:

[0033] Step S1: Weigh 3.5 g of zirconium oxychloride into a beaker, add 300 mL of deionized water, and stir with a glass rod until completely dissolved. Then, add approximately 10 mL of 10% acetic acid solution and stir evenly to obtain a zirconium oxychloride solution.

[0034] Step S2: Weigh 2 g of polyvinyl pyrrolidone into a beaker, add 200 mL of deionized water, and stir to completely dissolve the solution to prepare a polyvinyl pyrrolidone aqueous solution. Then, weigh 0.105 g of polymethyl methacrylate microspheres with a particle size of 0.2 μm and add them to the aqueous solution. Place the beaker in an ultrasonic oscillator and oscillate for 15 minutes to evenly disperse the microspheres, thereby obtaining a polymethyl methacrylate microsphere suspension.

[0035] Step S3: slowly pour the polymethyl methacrylate microsphere suspension into the beaker containing the zirconium oxychloride solution, and stir the solution at a speed of 300 r / min using a magnetic stirrer for 20 minutes to mix the solution evenly to obtain a coating solution.

[0036] Step S4: Add 10g of corundum powder to the coating solution, place the beaker in a constant temperature water bath, set the temperature to 60℃, turn on the magnetic stirrer, and stir at a speed of 400r / min. Use a rubber dropper to slowly add a 25% ammonia solution, while constantly monitoring the pH value of the solution with a pH meter to control the pH to 4.5. After the addition is completed, continue stirring for 30 minutes to allow Zr 4+ The solution was fully hydrolyzed into Zr(OH)4 colloid, which was uniformly deposited on the surface of the corundum particles. Stirring was then stopped, and the beaker was left to age for 12 hours. After aging, the solution was filtered using a suction filtration device, and the filter cake was collected and washed three times with deionized water until the pH of the washing solution reached approximately 7. Finally, the filter cake was transferred to a drying oven and dried at 105°C for 12 hours to obtain the nascent zirconium oxide-coated corundum micropowder.

[0037] Step S5: Place the nascent zirconia-coated corundum powder into a crucible, place it in a muffle furnace, set the calcination temperature to 1125°C, and calcinate for 1.5 hours. After the muffle furnace is heated to the set temperature, the crucible is placed in. After calcination, the muffle furnace is closed and the temperature in the furnace is naturally cooled to room temperature. The crucible is then removed to obtain the zirconia-coated corundum powder.

[0038] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0039] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer together, set the mixer speed to 200 r / min, and stir for 30 minutes to mix the components evenly to obtain a special low-carbon refractory quartz dry vibration material sample.

[0040] Example 2

[0041] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0042] 72 parts of quartz aggregate, 21 parts of zirconium oxide coated corundum powder, 4 parts of aluminum dihydrogen phosphate, 0.6 parts of lithium borate, and 0.6 parts of yttrium oxide. The quartz aggregate particle size is divided into two types: 0.1-1.0 mm and 1.5-5.0 mm, and the mass ratio of the two is 1:2.

[0043] The preparation method of zirconium oxide coated corundum powder comprises the following steps:

[0044] Step S1: Weigh 2.5 g of zirconium oxychloride into a beaker, add 300 mL of deionized water, and stir with a glass rod until completely dissolved. Then, add approximately 10 mL of 10% acetic acid solution and stir evenly to obtain a zirconium oxychloride solution.

[0045] Step S2: Weigh 2 g of polyvinyl pyrrolidone into a beaker, add 200 mL of deionized water, and stir to completely dissolve the solution to prepare a polyvinyl pyrrolidone aqueous solution. Then, weigh 0.075 g of polymethyl methacrylate microspheres with a particle size of 0.2 μm and add them to the aqueous solution. Place the beaker in an ultrasonic oscillator and oscillate for 15 minutes to evenly disperse the microspheres, thereby obtaining a polymethyl methacrylate microsphere suspension.

[0046] Step S3: slowly pour the polymethyl methacrylate microsphere suspension into the beaker containing the zirconium oxychloride solution, and stir the solution at a speed of 300 r / min using a magnetic stirrer for 20 minutes to mix the solution evenly to obtain a coating solution.

[0047] Step S4: Add 10g of corundum powder to the coating solution, place the beaker in a constant temperature water bath, set the temperature to 60℃, turn on the magnetic stirrer, and stir at a speed of 400r / min. Use a rubber dropper to slowly add a 25% ammonia solution, while constantly monitoring the pH value of the solution with a pH meter to control the pH to 4. After the addition is completed, continue stirring for 30 minutes to allow Zr 4+ The solution was fully hydrolyzed into Zr(OH)4 colloid, which was uniformly deposited on the surface of the corundum particles. Stirring was then stopped, and the beaker was left to age for 12 hours. After aging, the solution was filtered using a suction filtration device, and the filter cake was collected and washed three times with deionized water until the pH of the washing solution reached approximately 7. Finally, the filter cake was transferred to a drying oven and dried at 105°C for 12 hours to obtain the nascent zirconium oxide-coated corundum micropowder.

[0048] Step S5: Place the nascent zirconia-coated corundum powder into a crucible, place it in a muffle furnace, set the calcination temperature to 1125°C, and calcinate for 1.5 hours. After the muffle furnace is heated to the set temperature, the crucible is placed in. After calcination, the muffle furnace is closed and the temperature in the furnace is naturally cooled to room temperature. The crucible is then removed to obtain the zirconia-coated corundum powder.

[0049] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0050] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer together, set the mixer speed to 200 r / min, and stir for 30 minutes to mix the components evenly to obtain a special low-carbon refractory quartz dry vibration material sample.

[0051] Example 3

[0052] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0053] 75 parts of quartz aggregate, 25 parts of zirconium oxide coated corundum powder, 4.5 parts of aluminum dihydrogen phosphate, 0.7 parts of lithium borate, and 0.8 parts of yttrium oxide. The quartz aggregate has two particle sizes: 0.1-1.0 mm and 1.5-5.0 mm, with a mass ratio of 1:2.

[0054] The preparation method of zirconium oxide coated corundum powder comprises the following steps:

[0055] Step S1: Weigh 3 g of zirconium oxychloride into a beaker, add 300 mL of deionized water, and stir with a glass rod until completely dissolved. Then, add approximately 10 mL of 10% acetic acid solution and stir evenly to obtain a zirconium oxychloride solution.

[0056] Step S2: Weigh 2 g of polyvinyl pyrrolidone into a beaker, add 200 mL of deionized water, and stir to completely dissolve the solution to prepare a polyvinyl pyrrolidone aqueous solution. Then, weigh 0.09 g of polymethyl methacrylate microspheres with a particle size of 0.2 μm and add them to the aqueous solution. Place the beaker in an ultrasonic oscillator and oscillate for 15 minutes to evenly disperse the microspheres, thereby obtaining a polymethyl methacrylate microsphere suspension.

[0057] Step S3: slowly pour the polymethyl methacrylate microsphere suspension into the beaker containing the zirconium oxychloride solution, and stir the solution at a speed of 300 r / min using a magnetic stirrer for 20 minutes to mix the solution evenly to obtain a coating solution.

[0058] Step S4: Add 10g of corundum powder to the coating solution, place the beaker in a constant temperature water bath, set the temperature to 60℃, turn on the magnetic stirrer, and stir at a speed of 400r / min. Use a rubber dropper to slowly add a 25% ammonia solution, while constantly monitoring the pH value of the solution with a pH meter to control the pH to 4.5. After the addition is completed, continue stirring for 30 minutes to allow Zr 4+ The solution was fully hydrolyzed into Zr(OH)4 colloid, which was uniformly deposited on the surface of the corundum particles. Stirring was then stopped, and the beaker was left to age for 12 hours. After aging, the solution was filtered using a suction filtration device, and the filter cake was collected and washed three times with deionized water until the pH of the washing solution reached approximately 7. Finally, the filter cake was transferred to a drying oven and dried at 105°C for 12 hours to obtain the nascent zirconium oxide-coated corundum micropowder.

[0059] Step S5: Place the nascent zirconia-coated corundum powder into a crucible, place it in a muffle furnace, set the calcination temperature to 1125°C, and calcinate for 1.5 hours. After the muffle furnace is heated to the set temperature, the crucible is placed in. After calcination, the muffle furnace is closed and the temperature in the furnace is naturally cooled to room temperature. The crucible is then removed to obtain the zirconia-coated corundum powder.

[0060] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0061] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer together, set the mixer speed to 200 r / min, and stir for 30 minutes to mix the components evenly to obtain a special low-carbon refractory quartz dry vibration material sample.

[0062] Example 4

[0063] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0064] 80 parts of quartz aggregate, 30 parts of zirconium oxide coated corundum powder, 6 parts of aluminum dihydrogen phosphate, 1 part of lithium borate, and 1 part of yttrium oxide. The quartz aggregate particle size is divided into two types: 0.1-1.0 mm and 1.5-5.0 mm, and the mass ratio of the two is 1:2.

[0065] The preparation method of zirconium oxide coated corundum powder comprises the following steps:

[0066] Step S1: Weigh 4 g of zirconium oxychloride into a beaker, add 300 mL of deionized water, and stir with a glass rod until completely dissolved. Then, add approximately 10 mL of 10% acetic acid solution and stir evenly to obtain a zirconium oxychloride solution.

[0067] Step S2: Weigh 2 g of polyvinyl pyrrolidone into a beaker, add 200 mL of deionized water, and stir to completely dissolve the solution to prepare a polyvinyl pyrrolidone aqueous solution. Then, weigh 0.2 g of polymethyl methacrylate microspheres with a particle size of 0.3 μm and add them to the aqueous solution. Place the beaker in an ultrasonic oscillator and oscillate for 15 minutes to evenly disperse the microspheres, thereby obtaining a polymethyl methacrylate microsphere suspension.

[0068] Step S3: slowly pour the polymethyl methacrylate microsphere suspension into the beaker containing the zirconium oxychloride solution, and stir the solution at a speed of 300 r / min using a magnetic stirrer for 20 minutes to mix the solution evenly to obtain a coating solution.

[0069] Step S4: Add 10g of corundum powder to the coating solution, place the beaker in a constant temperature water bath, set the temperature to 60℃, turn on the magnetic stirrer, and stir at a speed of 400r / min. Use a rubber dropper to slowly add a 25% ammonia solution, while constantly monitoring the pH value of the solution with a pH meter to control the pH to 4. After the addition is completed, continue stirring for 30 minutes to allow Zr 4+ The solution was fully hydrolyzed into Zr(OH)4 colloid, which was uniformly deposited on the surface of the corundum particles. Stirring was then stopped, and the beaker was left to age for 12 hours. After aging, the solution was filtered using a suction filtration device, and the filter cake was collected and washed three times with deionized water until the pH of the washing solution reached approximately 7. Finally, the filter cake was transferred to a drying oven and dried at 105°C for 12 hours to obtain the nascent zirconium oxide-coated corundum micropowder.

[0070] Step S5: Place the nascent zirconia-coated corundum powder into a crucible, place it in a muffle furnace, set the calcination temperature to 1150°C, and calcinate for 2 hours. After the muffle furnace is heated to the set temperature, the crucible is placed in. After calcination, the muffle furnace is closed and the temperature in the furnace is allowed to cool naturally to room temperature. The crucible is then removed to obtain the zirconia-coated corundum powder.

[0071] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0072] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer together, set the mixer speed to 200 r / min, and stir for 30 minutes to mix the components evenly to obtain a special low-carbon refractory quartz dry vibration material sample.

[0073] Example 5

[0074] A special low-carbon refractory quartz dry vibration material, comprising the following components in parts by weight:

[0075] 70 parts of quartz aggregate, 20 parts of zirconium oxide coated corundum powder, 3 parts of aluminum dihydrogen phosphate, 0.5 parts of lithium borate, and 0.5 parts of yttrium oxide. The quartz aggregate has two particle sizes: 0.1-1.0 mm and 1.5-5.0 mm, with a mass ratio of 1:2.

[0076] The preparation method of zirconium oxide coated corundum powder comprises the following steps:

[0077] Step S1: Weigh 2 g of zirconium oxychloride into a beaker, add 300 mL of deionized water, and stir with a glass rod until completely dissolved. Then, add approximately 10 mL of 10% acetic acid solution and stir evenly to obtain a zirconium oxychloride solution.

[0078] Step S2: Weigh 2 g of polyvinyl pyrrolidone into a beaker, add 200 mL of deionized water, and stir to completely dissolve the solution to prepare a polyvinyl pyrrolidone aqueous solution. Then, weigh 0.03 g of polymethyl methacrylate microspheres with a particle size of 0.1 μm and add them to the aqueous solution. Place the beaker in an ultrasonic oscillator and oscillate for 15 minutes to evenly disperse the microspheres, thereby obtaining a polymethyl methacrylate microsphere suspension.

[0079] Step S3: slowly pour the polymethyl methacrylate microsphere suspension into the beaker containing the zirconium oxychloride solution, and stir the solution at a speed of 300 r / min using a magnetic stirrer for 20 minutes to mix the solution evenly to obtain a coating solution.

[0080] Step S4: Add 10g of corundum powder to the coating solution, place the beaker in a constant temperature water bath, set the temperature to 60℃, turn on the magnetic stirrer, and stir at a speed of 400r / min. Use a rubber dropper to slowly add a 25% ammonia solution, while constantly monitoring the pH value of the solution with a pH meter to control the pH to 4.5. After the addition is completed, continue stirring for 30 minutes to allow Zr 4+ The solution was fully hydrolyzed into Zr(OH)4 colloid, which was uniformly deposited on the surface of the corundum particles. Stirring was then stopped, and the beaker was left to age for 12 hours. After aging, the solution was filtered using a suction filtration device, and the filter cake was collected and washed three times with deionized water until the pH of the washing solution reached approximately 7. Finally, the filter cake was transferred to a drying oven and dried at 105°C for 12 hours to obtain the nascent zirconium oxide-coated corundum micropowder.

[0081] Step S5: Place the nascent zirconia-coated corundum powder into a crucible, place it in a muffle furnace, set the calcination temperature to 1100°C, and calcinate for 1 hour. After the muffle furnace is heated to the set temperature, the crucible is placed in. After calcination is completed, the muffle furnace is closed and the temperature in the furnace is allowed to cool naturally to room temperature. The crucible is then removed to obtain the zirconia-coated corundum powder.

[0082] A method for preparing a special low-carbon refractory quartz dry vibration material comprises the following steps:

[0083] Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer together, set the mixer speed to 200 r / min, and stir for 30 minutes to mix the components evenly to obtain a special low-carbon refractory quartz dry vibration material sample.

[0084] Comparative Example 1

[0085] The difference between Comparative Example 1 and the embodiment is that the zirconium oxide-coated corundum micropowder is replaced with ordinary corundum micropowder, and the other steps are the same.

[0086] Comparative Example 2

[0087] The difference between Comparative Example 2 and Example 1 is that polymethyl methacrylate microspheres are not added during the preparation of zirconium oxide-coated corundum micropowder, and the remaining steps are the same.

[0088] Comparative Example 3

[0089] The difference between Comparative Example 3 and Example 5 is that the mass ratio of corundum micropowder to zirconium oxychloride is 10:1, and the other steps are the same.

[0090] Comparative Example 4

[0091] The difference between Comparative Example 4 and Example 4 is that the mass ratio of corundum micropowder to zirconium oxychloride is 10:5, and the other steps are the same.

[0092] Comparative Example 5

[0093] The difference between Comparative Example 5 and Example 4 is that the mass ratio of corundum micropowder to zirconium oxychloride is 10:6, and the other steps are the same.

[0094] Performance testing:

[0095] 1. Carbon Content Test: Determined using the high-frequency induction combustion-infrared absorption method. Grind the dry vibration material sample into a fine powder. Accurately weigh approximately 0.5g of sample and place it in the crucible of a high-frequency induction combustion furnace. High-frequency induction heating fully combusts the sample in a pure oxygen environment, converting the carbon in the sample into carbon dioxide gas. After dust and water removal, the resulting carbon dioxide gas enters an infrared absorption cell. According to the Lambert-Beer law, the degree of carbon dioxide's absorption of infrared light of a specific wavelength is proportional to the carbon dioxide concentration. The absorption intensity is measured by an infrared detector, and the carbon content of the sample is calculated by a data processing system. The test results are shown in Table 1.

[0096] 2. Thermal Shock Resistance Testing: According to the national standard GB / T 30873.1-2014, "Test Method for Thermal Shock Resistance of Refractory Materials," dry refractories were processed into specimens measuring 50 mm × 50 mm × 50 mm. The specimens were first placed in a high-temperature furnace and heated to 1100°C at a rate of 5°C / min. After holding at this temperature for 30 minutes, they were quickly removed and immersed in water at approximately 25°C for cooling for 3 minutes. This heating-cooling cycle was repeated, with the specimens removed after every five cycles. The specimens were inspected for crack growth using an ultrasonic flaw detector and tested for compressive strength at room temperature using a pressure testing machine. The number of thermal shock cycles required for the appearance of through-cracks or a drop in strength to 50% of the initial strength was recorded to assess the thermal shock resistance of the material. The test results are shown in Table 1.

[0097] 3. Thermal conductivity test: The thermal conductivity of zirconia-coated corundum micropowder or corundum micropowder was measured using the Laser Flash Method. The prepared micropowder sample was pressed into a disc with a diameter of 12.7 mm and a thickness of 2-3 mm. Graphite coating was sprayed on both sides to enhance infrared absorption. A thermal conductivity meter (Netzsch LFA457) was used for testing. Under an argon protective atmosphere, the sample was heated to 100°C and the test was repeated three times. The front of the sample was heated by a laser pulse, and the infrared detector recorded the temperature rise curve on the back. According to the formula λ = α × C p ×ρ to calculate thermal conductivity (where α is the thermal diffusivity, C p is the specific heat capacity, ρ is the sample density). The test results are shown in Table 1.

[0098] 4. Room-Temperature Compressive Strength Test: According to GB / T 5072-2008, "Test Method for Room-Temperature Compressive Strength of Refractory Materials," dry vibrated material was formed into rectangular specimens measuring 70 mm × 30 mm × 30 mm. Three specimens were prepared for each test. At room temperature, the specimens were placed in the center of the load plate of a pressure testing machine. Pressure was applied uniformly at a rate of 1.5 MPa / s until the specimens failed. The maximum pressure value (F) at failure was recorded. The room-temperature compressive strength was calculated using the formula σ = F / S (where S is the compressive area of ​​the specimen). The final result was the average of the three test values. The test results are shown in Table 1.

[0099] Table 1:

[0100]

[0101] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A special low-carbon refractory quartz dry vibration material, characterized in that: Comprise the following components by weight: 70-80 parts of quartz aggregate, 20-30 parts of zirconia-coated corundum powder, 3-6 parts of aluminum dihydrogen phosphate, 0.5-1 part of lithium borate, and 0.5-1 part of yttrium oxide; The preparation method of the zirconium oxide-coated corundum powder comprises the following steps: S1. dissolving zirconium oxychloride in deionized water, and then adding acetic acid as a hydrolysis inhibitor to obtain a zirconium oxychloride solution; S2, adding polymethyl methacrylate microspheres to an aqueous solution of polyvinyl pyrrolidone, and uniformly dispersing the microspheres by ultrasonic oscillation to obtain a polymethyl methacrylate microsphere suspension; S3, adding the polymethyl methacrylate microsphere suspension to the zirconium oxychloride solution, stirring and dispersing the mixture evenly to obtain a coating solution; S4, add corundum powder to the coating solution, the mass ratio of corundum powder to zirconium oxychloride is 10:2-4, slowly add ammonia solution under heating and stirring conditions, control the pH to 4-4.5, and make Zr 4+ It is gradually hydrolyzed into Zr(OH)4 colloid and uniformly deposited on the surface of Al2O3 particles. After aging for 12 hours, primary zirconia-coated corundum powder is obtained through separation by suction, washing and drying. S5. The nascent zirconia-coated corundum micropowder is placed in a muffle furnace and calcined to obtain the zirconia-coated corundum micropowder.

2. A special low-carbon refractory quartz dry vibration material according to claim 1, characterized in that: The quartz aggregate particle sizes are divided into two types: 0.1-1.0 mm and 1.5-5.0 mm, and the mass ratio of the two is 1:

2.

3. The special low-carbon refractory quartz dry vibration material according to claim 1, characterized in that: In step S2, the particle size of the polymethyl methacrylate microspheres is 0.1-0.3 μm.

4. The special low-carbon refractory quartz dry vibration material according to claim 1, characterized in that: In step S2, the amount of polymethyl methacrylate microspheres used is 1.5-5 wt% of the mass of zirconium oxychloride.

5. The special low-carbon refractory quartz dry vibration material according to claim 1, characterized in that: In step S5, the calcination temperature is 1100-1150° C., and the calcination time is 1-2 hours.

6. A method for preparing the special low-carbon refractory quartz dry vibration material according to any one of claims 1 to 5, characterized in that: The following steps are involved: Add quartz aggregate, zirconium oxide coated corundum powder, aluminum dihydrogen phosphate, lithium borate and yttrium oxide into a mixer and stir evenly to obtain the product.

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