Glass melting furnace composite energy-saving pool bottom large brick and preparation method thereof

Abstract

The invention discloses a glass melting furnace composite energy-saving pool bottom large brick and a preparation method thereof, and belongs to the technical field of brick body preparation, the glass melting furnace composite energy-saving pool bottom large brick comprises the following components: flint clay, refractory clay, mullite fine powder, high-alumina cement powder, silica fume, bauxite, light mullite and a binding agent; according to the invention, the step of drying the material is set before calcining, so that the adverse effect of evaporation of free moisture and liquid outside the material on the material due to direct calcining is avoided, and during forming, the two layers of brick bodies, the heavy working layer and the light insulating layer are arranged, so that forming and one-time calcining are carried out successively. Meanwhile, during calcination, multiple different treatment stages can be divided, it can be guaranteed that the materials are evenly heated in the heating process through step-by-step calcination, the phenomena of uneven internal stress and cracking caused by rapid heating are avoided, and by gradually heating and maintaining for a certain period of time, the thermal conductivity of the materials is improved. And the crystal structure in the material is fully grown and stabilized, so that the mechanical properties such as compressive strength and thermal shock resistance of the material are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of brick preparation, and in particular relates to a large composite energy-saving bottom brick for a glass melting furnace and a preparation method thereof. Background Art

[0002] Bricks are a common building material, widely used in construction, roads, bridges and other engineering fields. Bricks can be divided into many types according to different uses and manufacturing materials. The composition of each type of brick is different, and different types of bricks have different application effects.

[0003] A Chinese patent discloses (CN110423105A) a method for preparing micro-expansion large bricks, including mixing, brick making, heat treatment, pre-expansion treatment, and cooling processes. Nano-zirconium oxide, graphite powder, etc. are added to the raw materials of the micro-expansion large bricks, and inert gas cooling is used during cooling, which can enhance the seismic strength of the large bricks; a graphene protective layer is heat-treated on the surface of the large bricks, and then a pre-expansion treatment is further performed, which can further increase the strength of the large bricks on the one hand, and on the other hand, the expansion problem can be avoided during the heating process of the large bricks, which is convenient for the subsequent repair of the furnace body; the prepared silica bricks can be widely used in the construction of coke ovens, glass melting furnaces, acid steelmaking furnaces and other thermal processing equipment. Although the current brick preparation method can also complete the preparation of bricks, its main method still adopts a unified mixing method of materials, which cannot guarantee the mixing effect of different materials. At the same time, during calcination, there is no stage division, and the temperature of the material will rise suddenly, resulting in uneven stress in the material, which is very easy to crack. The actual application effect of the overall method is not good. In order to solve this problem, there is an urgent need for glass melting furnace composite energy-saving pool bottom large bricks and their preparation methods. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that although the current brick preparation method can complete the preparation of the brick body, its main method still adopts a unified mixing method of materials, which cannot guarantee the mixing effect of different materials. At the same time, during calcination, no stage division is performed, and the temperature of the material will rise suddenly, resulting in uneven stress in the material, which is very easy to crack, and the actual application effect of the overall method is not good. A glass melting furnace composite energy-saving pool bottom large brick and a preparation method thereof are proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: glass melting furnace composite energy-saving pool bottom large bricks, including the following components: coke stone, refractory clay, mullite fine powder, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and binder.

[0006] As a further description of the above technical solution:

[0007] The weight proportions of the coke stone, refractory clay, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and binder are 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts respectively.

[0008] This article also discloses a method for preparing large composite energy-saving bottom bricks for a glass melting furnace, comprising the following steps:

[0009] S1, placing coke gemstone, microsilica powder and mullite in a grinding device respectively, grinding them respectively, sieving them after grinding and storing them respectively;

[0010] S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for a period of time;

[0011] S3, taking out the mixed material, waiting for the mixed material to dry at room temperature, and placing the preliminarily dried mixed material in a drying device for drying;

[0012] S4, loading the dried mixed material into a kiln for calcination, taking it out after calcination, crushing and screening it to form a composite body;

[0013] S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder processed in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, stirring and mixing the above mixture for a period of time to form an embryo;

[0014] S6, placing the embryo body in a mold and vibrating it to form it. After forming, let it stand for a period of time until it is completely solidified, then demould it and place it in a drying room for drying for a period of time;

[0015] S7, placing the dried embryo body in a shuttle kiln and calcining it at different stages to form a heavy material;

[0016] S8. Lower the temperature in the kiln to a certain level and take out the finished product;

[0017] S9, waiting for the finished product to cool down naturally and completely, and then storing it;

[0018] S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering;

[0019] S11. Cut the finished product into appropriate size according to design requirements.

[0020] As a further description of the above technical solution:

[0021] In S1, the coke gemstone, microsilica powder and mullite are placed in a grinding device respectively, ground respectively, and after grinding, they are sieved through 80-100 meshes and then stored respectively.

[0022] As a further description of the above technical solution:

[0023] In S2, the above-mentioned abrasive materials of pyrope stone and mullite are placed in a mixing container, a binder and water are added, and a mixing treatment is performed for 15-20 minutes.

[0024] As a further description of the above technical solution:

[0025] In S3, the mixed material is taken out and waited for the mixed material to dry at room temperature until the outer surface of the mixed material turns grayish white. The preliminarily dried mixed material is placed in a drying device and dried at 60-80° C. for 24-27 hours.

[0026] As a further description of the above technical solution:

[0027] In S4, the dried mixed material is charged into a kiln for calcination at a temperature of 1520-1630° C. for 72-74 hours. After calcination, the mixed material is taken out and placed in a pulverizing device for pulverization through an 80-100 mesh sieve.

[0028] As a further description of the above technical solution:

[0029] In S5, the prepared synthetic powder is placed in a mixing device, the microsilica powder treated in S1 is added to the mixing device, high alumina cement powder, refractory clay and bauxite are added, and then a certain amount of water is added to the device, the mixing rate is set to 600-800r / min, and the mixture is stirred and mixed for 65-75min to form an embryo.

[0030] As a further description of the above technical solution:

[0031] In S6, the embryo body is placed in a mold for vibration molding. After molding, it is allowed to stand for 24 hours to completely solidify, then demolded and placed in a drying room for 48 hours for drying. The vibration molding process is as follows: first, the steel mold is placed on a vibration platform, and the mixed lightweight material is poured into the bottom of the mold, occupying half the volume of the mold depth. After vibrating for 5-10 minutes, it is allowed to stand for 10-20 minutes to roughen the surface of the lightweight layer, and the mixed heavy material is poured into the upper part of the same mold, and the vibration is continued for 5-10 minutes.

[0032] As a further description of the above technical solution:

[0033] In the S7, the dried embryo body is placed in a shuttle kiln for calcination in different stages to form a heavy material. The calcination is divided into four different stages, wherein the first stage is to give 1050-1180°C and constant temperature treatment for 22-24h, the second stage is to give 1250-1380°C and constant temperature treatment for 40-50h, the third stage is to give 1420-1480°C and constant temperature treatment for 20-22h, and the fourth stage is to give 1500-1580°C and constant temperature treatment for 8-10h. In the S8, the temperature in the kiln is reduced to 400-450°C at a rate of 25-38°C / h, and the finished material is taken out.

[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0035] The method avoids direct calcination by providing a material drying step before calcination, so that the free water and liquid on the outside of the material evaporate to reduce the adverse effects on the material itself. During molding, two layers of bricks are provided, a heavy working layer and a light insulation layer, and molding is performed successively and calcined once. At the same time, during calcination, it can be divided into a number of different processing stages. Calcination in steps can ensure that the material is evenly heated during the heating process, avoiding uneven internal stress and cracking caused by rapid heating. By gradually heating and maintaining a certain period of time, the crystal structure in the material can be fully grown and stabilized, thereby improving the material's compressive strength, thermal shock resistance and other mechanical properties. Calcination in steps can optimize the heating curve, reduce unnecessary heat loss, fully release the stress of two layers of different materials, reduce energy consumption, and improve the practical application effect of the method. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a flow chart of a method for preparing large composite energy-saving bottom bricks for a glass melting furnace. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1 The present invention provides a technical solution: a large composite energy-saving bottom brick for a glass melting furnace, comprising the following components: coke, refractory clay, mullite fine powder, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and a binder, with the weight proportions being 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts.

[0040] This article also discloses a method for preparing large composite energy-saving bottom bricks for a glass melting furnace, comprising the following steps:

[0041] S1, respectively placing coke gemstone, microsilica powder and mullite in a grinding device, grinding them respectively, and after grinding, passing through a 100-mesh sieve and then storing them respectively;

[0042] S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for 20 minutes;

[0043] S3, take out the mixture, wait for the mixture to dry at room temperature, wait until the outer surface of the mixture turns grayish white, place the preliminarily dried mixture in a drying device, and dry it at 80°C for 27 hours;

[0044] S4, the dried mixed material is loaded into a kiln for calcination at a temperature of 1630°C for 74 hours, and after calcination, it is taken out and placed in a pulverizing device for pulverization through a 100-mesh sieve;

[0045] S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder treated in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, setting the mixing rate to 800r / min, stirring and mixing the above mixture for 65-75min to form an embryo;

[0046] S6, placing the embryo body in a mold and performing vibration molding. After molding, standing for 24 hours to completely solidify, demolding and placing in a drying room for 48 hours for drying, wherein the vibration molding process is: firstly placing the steel mold on a vibration platform, pouring the mixed light material into the bottom of the mold, occupying half of the volume of the mold depth, vibrating for 10 minutes, standing for 20 minutes, roughening the surface of the light layer, pouring the mixed heavy material into the upper half of the same mold, and continuing to vibrate for 10 minutes;

[0047] S7, placing the dried embryo body in a shuttle kiln for calcination at different stages to form heavy materials. The calcination is divided into four different stages, wherein the first stage is 1180°C and constant temperature treatment for 24 hours, the second stage is 1380°C and constant temperature treatment for 50 hours, the third stage is 1480°C and constant temperature treatment for 22 hours, and the fourth stage is 1580°C and constant temperature treatment for 10 hours;

[0048] S8, reduce the temperature in the kiln to 400°C at a rate of 25°C / h, and take out the finished material;

[0049] S9, waiting for the finished product to cool down naturally and completely, and then storing it;

[0050] S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering;

[0051] S11. Cut the finished product into appropriate size according to design requirements.

[0052] In this embodiment, the method divides the mixing of materials into two different steps, namely the synthesis body preparation stage and the embryo preparation stage, and does not adopt a unified mixing preparation design for materials. This enables the components of the materials to be mixed more effectively and ensures the quality of the final product.

[0053] Example 2

[0054] See also Figure 1 The present invention provides a technical solution: a large composite energy-saving bottom brick for a glass melting furnace, comprising the following components: coke, refractory clay, mullite fine powder, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and a binder, with the weight proportions being 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts.

[0055] This article also discloses a method for preparing large composite energy-saving bottom bricks for a glass melting furnace, comprising the following steps:

[0056] S1, respectively placing coke gemstone, microsilica powder and mullite in a grinding device, grinding them respectively, and after grinding, passing through a 90-mesh sieve and storing them respectively;

[0057] S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for 18 minutes;

[0058] S3, take out the mixture, wait for the mixture to dry at room temperature, wait until the outer surface of the mixture turns grayish white, place the preliminarily dried mixture in a drying device, and dry it at 70°C for 25 hours;

[0059] S4, the dried mixed material is loaded into a kiln for calcination at a temperature of 1550°C for 73 hours, and after calcination, the mixed material is taken out and placed in a pulverizing device for pulverization through a 90-mesh sieve;

[0060] S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder treated in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, setting the mixing rate to 700r / min, stirring and mixing the above mixture for 70 minutes to form an embryo;

[0061] S6, placing the embryo body in a mold and performing vibration molding. After molding, standing for 24 hours to completely solidify, demolding and placing in a drying room for 48 hours for drying, wherein the vibration molding process is as follows: firstly, placing the steel mold on a vibration platform, pouring the mixed light material into the bottom of the mold, occupying half the volume of the mold depth, vibrating for 7 minutes, standing for 12 minutes, roughening the surface of the light layer, pouring the mixed heavy material into the upper half of the same mold, and continuing to vibrate for 7 minutes;

[0062] S7, placing the dried embryo body in a shuttle kiln for calcination at different stages to form heavy materials. The calcination is divided into four different stages, wherein the first stage is 1080°C for constant temperature treatment for 23 hours, the second stage is 1270°C for constant temperature treatment for 45 hours, the third stage is 1460°C for constant temperature treatment for 21 hours, and the fourth stage is 1520°C for constant temperature treatment for 9 hours;

[0063] S8, reduce the temperature in the kiln to 420°C at a rate of 25-38°C / h, and take out the finished product;

[0064] S9, waiting for the finished product to cool down naturally and completely, and then storing it;

[0065] S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering;

[0066] S11. Cut the finished product into appropriate size according to design requirements.

[0067] In this embodiment, the method is provided with a drying step for the material before calcination to avoid direct calcination and the adverse effect of evaporation of the liquid outside the material on the material itself.

[0068] Example 3

[0069] See also Figure 1 The present invention provides a technical solution: a large composite energy-saving bottom brick for a glass melting furnace, comprising the following components: coke, refractory clay, mullite fine powder, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and a binder, with the weight proportions being 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts.

[0070] This article also discloses a method for preparing large composite energy-saving bottom bricks for a glass melting furnace, comprising the following steps:

[0071] S1, respectively placing coke gemstone, microsilica powder and mullite in a grinding device, grinding them respectively, and after grinding, passing through a 100-mesh sieve and then storing them respectively;

[0072] S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for 20 minutes;

[0073] S3, take out the mixture, wait for the mixture to dry at room temperature, wait until the outer surface of the mixture turns grayish white, place the preliminarily dried mixture in a drying device, and dry it at 80°C for 27 hours;

[0074] S4, the dried mixed material is loaded into a kiln for calcination at a temperature of 1630°C for 74 hours, and after calcination, it is taken out and placed in a pulverizing device for pulverization through a 100-mesh sieve;

[0075] S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder treated in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, setting the mixing rate to 800r / min, stirring and mixing the above mixture for 75min to form an embryo;

[0076] S6, placing the embryo body in a mold and performing vibration molding. After molding, standing for 24 hours to completely solidify, demolding and placing in a drying room for 48 hours for drying, wherein the vibration molding process is as follows: firstly, placing the steel mold on a vibration platform, pouring the mixed light material into the bottom of the mold, occupying half the volume of the mold depth, vibrating for 8 minutes, standing for 13 minutes, roughening the surface of the light layer, pouring the mixed heavy material into the upper half of the same mold, and continuing to vibrate for 8 minutes;

[0077] S7, placing the dried embryo body in a shuttle kiln for calcination at different stages to form heavy materials. The calcination is divided into four different stages, wherein the first stage is 1180°C and constant temperature treatment for 24 hours, the second stage is 1380°C and constant temperature treatment for 50 hours, the third stage is 1480°C and constant temperature treatment for 22 hours, and the fourth stage is 1580°C and constant temperature treatment for 10 hours;

[0078] S8, reduce the temperature in the kiln to 450°C at a rate of 38°C / h, and take out the finished product;

[0079] S9, waiting for the finished product to cool down naturally and completely, and then storing it;

[0080] S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering;

[0081] S11. Cut the finished product into appropriate size according to design requirements.

[0082] In this embodiment, during calcination, it can be divided into multiple different processing stages. Calcination in steps can ensure that the material is heated evenly during the heating process, avoiding uneven internal stress and cracking caused by rapid heating. By gradually heating up and maintaining a certain period of time, the crystal structure in the material can be fully grown and stabilized, thereby improving the material's compressive strength, thermal shock resistance and other mechanical properties. Calcination in steps can optimize the heating curve, reduce unnecessary heat loss, and reduce energy consumption. At the same time, by controlling gas emissions during the calcination process, the generation and emission of harmful substances can be reduced, which is beneficial to environmental protection.

[0083] Example 4

[0084] See also Figure 1 The present invention provides a technical solution: a large composite energy-saving bottom brick for a glass melting furnace, comprising the following components: coke, refractory clay, mullite fine powder, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and a binder, with the weight proportions being 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts.

[0085] This article also discloses a method for preparing large composite energy-saving bottom bricks for a glass melting furnace, comprising the following steps:

[0086] S1, respectively placing coke gemstone, microsilica powder and mullite in a grinding device, grinding them respectively, and after grinding, passing through a 100-mesh sieve and then storing them respectively;

[0087] S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for 20 minutes;

[0088] S3, take out the mixture, wait for the mixture to dry at room temperature, wait until the outer surface of the mixture turns grayish white, place the preliminarily dried mixture in a drying device, and dry it at 80°C for 27 hours;

[0089] S4, the dried mixed material is loaded into a kiln for calcination at a temperature of 1630°C for 74 hours, and after calcination, the mixed material is taken out and placed in a pulverizing device for pulverization through a 90-mesh sieve;

[0090] S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder treated in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, setting the mixing rate to 800r / min, stirring and mixing the above mixture for 70 minutes to form an embryo;

[0091] S6, placing the embryo body in a mold and performing vibration molding. After molding, standing for 24 hours to completely solidify, demolding and placing in a drying room for 48 hours for drying, wherein the vibration molding process is: firstly placing the steel mold on a vibration platform, pouring the mixed light material into the bottom of the mold, occupying half of the volume of the mold depth, vibrating for 5 minutes, standing for 10 minutes, roughening the surface of the light layer, pouring the mixed heavy material into the upper half of the same mold, and continuing to vibrate for 5 minutes;

[0092] S7. The dried embryo is placed in a shuttle kiln for calcination at different stages to form a heavy material. The calcination is divided into four different stages, wherein the first stage is 1180°C for constant temperature treatment for 24 hours, the second stage is 1350°C for constant temperature treatment for 50 hours, the third stage is 1480°C for constant temperature treatment for 22 hours, and the fourth stage is 1560°C for constant temperature treatment for 9 hours;

[0093] S8, reduce the temperature in the kiln to 440°C at a rate of 38°C / h, and take out the finished product;

[0094] S9, waiting for the finished product to cool down naturally and completely, and then storing it;

[0095] S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering;

[0096] S11. Cut the finished product into appropriate size according to design requirements.

[0097] In this embodiment, the method divides the mixing of materials into two different steps, namely the synthesis body preparation stage and the embryo body preparation stage, and does not adopt a unified mixing preparation design for the materials, which can enable the components of the materials to be mixed more effectively and ensure the quality of the final product. At the same time, the method is provided with a drying step for the materials before calcination to avoid direct calcination and the adverse effect of evaporation of the liquid outside the materials on the materials themselves. At the same time, during calcination, it can be divided into multiple different processing stages. Calcination in steps can ensure that the materials are heated evenly during the heating process, avoiding uneven internal stress and cracking caused by rapid heating. By gradually heating up and maintaining a certain period of time, the crystal structure in the material can be fully grown and stabilized, thereby improving the compressive strength, thermal shock resistance and other mechanical properties of the material. Calcination in steps can optimize the heating curve, reduce unnecessary heat loss, and reduce energy consumption. At the same time, by controlling gas emissions during the calcination process, the generation and emission of harmful substances are reduced, which is beneficial to environmental protection.

[0098] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Composite energy-saving bottom bricks for glass melting furnaces, characterized by: The composition includes the following ingredients: coke, refractory clay, mullite fine powder, high alumina cement powder, microsilica powder, bauxite, lightweight mullite and binder.

2. The glass melting furnace composite energy-saving pool bottom large brick according to claim 1 is characterized by: The weight proportions of the coke stone, refractory clay, high-alumina cement powder, microsilica powder, bauxite, lightweight mullite and binder are 8 parts, 9 parts, 6 parts, 5 parts, 7 parts, 6 parts and 3 parts respectively.

3. A method for preparing large composite energy-saving bottom bricks for a glass melting furnace, characterized in that: The steps include: S1, placing coke gemstone, microsilica powder and mullite in a grinding device respectively, grinding them respectively, sieving them after grinding and storing them respectively; S2, taking the above-mentioned coke gemstone and mullite grinding materials and placing them in a mixing container, adding a binder and water, and mixing them for a period of time; S3, taking out the mixed material, waiting for the mixed material to dry at room temperature, and placing the preliminarily dried mixed material in a drying device for drying; S4, loading the dried mixed material into a kiln for calcination, taking it out after calcination, crushing and screening it to form a composite body; S5, taking the prepared synthetic powder and placing it in a mixing device, adding the microsilica powder processed in S1 into the mixing device, continuing to add high-alumina cement powder, refractory clay and bauxite, and then adding a certain amount of water into the device, stirring and mixing the above mixture for a period of time to form an embryo; S6, placing the embryo body in a mold and vibrating it to form it. After forming, let it stand for a period of time until it is completely solidified, then demould it and place it in a drying room for drying for a period of time; S7, placing the dried embryo body in a shuttle kiln and calcining it at different stages to form a heavy material; S8. Lower the temperature in the kiln to a certain level and take out the finished product; S9, waiting for the finished product to cool down naturally and completely, and then storing it; S10, preparing a light material by the above process, and combining the prepared light material and heavy material together by ceramic sintering; S11. Cut the finished product into appropriate size according to design requirements.

4. The method for preparing the large composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S1, the coke gemstone, microsilica powder and mullite are placed in a grinding device respectively, ground respectively, and after grinding, they are sieved through 80-100 meshes and then stored respectively.

5. The method for preparing the large composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S2, the above-mentioned abrasive materials of pyrope stone and mullite are placed in a mixing container, a binder and water are added, and a mixing treatment is performed for 15-20 minutes.

6. The method for preparing the large composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S3, the mixed material is taken out and waited for the mixed material to dry at room temperature until the outer surface of the mixed material turns grayish white. The preliminarily dried mixed material is placed in a drying device and dried at 60-80° C. for 24-27 hours.

7. The method for preparing the composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S4, the dried mixed material is charged into a kiln for calcination at a temperature of 1520-1630° C. for a time of 72-74 hours. After calcination, the mixed material is taken out and placed in a pulverizing device for pulverization through an 80-100 mesh sieve.

8. The method for preparing the large composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S5, the prepared synthetic powder is placed in a mixing device, the microsilica powder treated in S1 is added to the mixing device, high alumina cement powder, refractory clay and bauxite are added, and then a certain amount of water is added to the device, the mixing rate is set to 600-800r / min, and the mixture is stirred and mixed for 65-75min to form an embryo.

9. The method for preparing the composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In S6, the embryo body is placed in a mold for vibration molding. After molding, it is allowed to stand for 24 hours to completely solidify, then demolded and placed in a drying room for 48 hours for drying. The vibration molding process is as follows: first, the steel mold is placed on a vibration platform, and the mixed lightweight material is poured into the bottom of the mold, occupying half the volume of the mold depth. After vibrating for 5-10 minutes, it is allowed to stand for 10-20 minutes to roughen the surface of the lightweight layer, and the mixed heavy material is poured into the upper part of the same mold, and the vibration is continued for 5-10 minutes.

10. The method for preparing the large composite energy-saving bottom bricks of a glass melting furnace according to claim 3, characterized in that: In the S7, the dried embryo body is placed in a shuttle kiln for calcination in different stages to form a heavy material. The calcination is divided into four different stages, wherein the first stage is to give 1050-1180°C and constant temperature treatment for 22-24h, the second stage is to give 1250-1380°C and constant temperature treatment for 40-50h, the third stage is to give 1420-1480°C and constant temperature treatment for 20-22h, and the fourth stage is to give 1500-1580°C and constant temperature treatment for 8-10h. In the S8, the temperature in the kiln is reduced to 400-450°C at a rate of 25-38°C / h, and the finished material is taken out.

Images