Method for preparing microcrystalline glass tube by using waste ceramic material

Abstract

The invention discloses a microcrystalline glass tube prepared from a waste ceramic material, and relates to the technical field of microcrystalline glass tubes. The glass ceramic tube is composed of the waste ceramic material, polytetrafluoroethylene, carbon powder and the like, the waste ceramic material is used for preparing the glass ceramic tube, the problem that the waste ceramic material is difficult to recycle is solved, and potential hazards of the waste ceramic material to the ecological environment are reduced. The polytetrafluoroethylene is added in the preparation process of the microcrystalline glass tube, the polytetrafluoroethylene is a high-strength corrosion-resistant high polymer material, and the corrosion resistance and mechanical strength of the material can be remarkably improved after the polytetrafluoroethylene is added. The microcrystalline glass tube is prepared from a ceramic material, is modified by adding inorganic salt, and is non-toxic, harmless to the environment, comprehensive in function and suitable for being used in various places.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of microcrystalline glass tube, in particular to a method for preparing microcrystalline glass tube by using waste ceramic materials. BACKGROUND

[0002] The rapid development of ceramic economy in modern society brings a large number of ceramic products to people, and greatly improves the living standard and quality of people. However, ceramic materials are easy to break, and a large number of ceramic fragments are generated after breaking. Recycling and utilization of these waste ceramic materials have become a big problem. Ceramic materials are stable in nature and cannot be degraded by nature. A large amount of ceramic materials will affect the soil ecology to a certain extent after being buried in the soil. Therefore, recycling of waste ceramic materials has important social significance.

[0003] In addition, with the rapid development of industrial society, the demand for various different performance pipe materials is also increasing. For example: building pipe materials, corrosion-resistant pipe materials for industrial transportation, wear-resistant pipe materials, etc. Under normal circumstances, whether it is the construction industry, industrial production, oil transportation industry, etc., it is necessary to separately produce pipe materials with special performance. For example: building pipe materials have high requirements for mechanical properties and aging resistance; tap water conveying pipe materials have high requirements for product environmental quality, aging resistance and hardness; and pipe materials for oil transportation industry have high requirements for corrosion resistance. The production of various different performance pipe materials consumes a large amount of social resources to a certain extent, and people need to establish various different production workshops to meet the needs of economy and society. Therefore, it is necessary to develop a high-performance pipe material product with the characteristics of corrosion resistance, environmental protection, excellent mechanical properties, etc. SUMMARY

[0004] To solve the above problems, the purpose of the present application is to provide a method for preparing microcrystalline glass tube by using waste ceramic materials.

[0005] To achieve the above purpose, the following technical solutions are used: A method for preparing microcrystalline glass tube by using waste ceramic materials, consisting of the following materials by weight: 65-75 parts of waste ceramic materials, 14-20 parts of Al(OH)3, 1.3-4.2 parts of Mg(OH)2, 1-2 parts of BaO, 2-6 parts of H3BO3, 1-2 parts of Na2SiF6, 1.5-3.5 parts of Na2CO3, 1-4 parts of Li2CO3, 1-5 parts of K2CO3, 0.5-3 parts of TiO2, 0.3-1.5 parts of Fe3O4, 0.3-2.0 parts of SrO, 2-6 parts of polytetrafluoroethylene and 2-6 parts of carbon powder.

[0006] Preferably, the waste ceramic material, Al(OH)3, Mg(OH)2, BaO, H3BO3, Na2SiF6, Na2CO3, Li2CO3, K2CO3, TiO2, Fe3O4, SrO, polytetrafluoroethylene and carbon powder are mixed in a weight ratio of 68-72:16-18:2.1-3.4:1.4-1.6:3.3-3.9:1.5-1.7:2.2-2.6:2-3:3.2-3.8:1.1-1.6:0.8-1.2:0.3-2.0:3.5-4.3:3-4, respectively.

[0007] The application also provides a method for preparing a microcrystalline glass tube from waste ceramic material, which comprises the following steps: (1) mixing and crushing the waste ceramic material, polytetrafluoroethylene, Al(OH)3, Mg(OH)2, BaO, H3BO3, Na2SiF6, Na2CO3, Li2CO3, K2CO3, TiO2, Fe3O4, SrO and carbon powder in a weight ratio of 65-75:2-6:14-20:1.3-4.2:1-2:2-6:1.5-3.5:1-4:1-5:0.5-3:0.3-1.5:0.3-2.0:2-6, respectively, to obtain a mixture; (2) heating the mixture obtained in step (1) to 1400-1600 ℃ and keeping it in a melting furnace for 0.5-2 hours to obtain a molten glass liquid; (3) pouring the molten glass liquid obtained in step (2) into a mold, cooling it to 500-650 ℃, keeping it for 1-2 hours, demolding, adding it to an annealing kiln, heating it to 600-800 ℃, and keeping it for 1-6 hours to obtain a glass tube to be processed; (4) cooling the glass tube to be processed obtained in step (3) to 30-100 ℃, polishing and cutting it to obtain a microcrystalline glass tube.

[0008] Preferably, in step (1), the waste ceramic material and polytetrafluoroethylene are crushed to a mesh size of 50-150.

[0009] Preferably, in step (2), the heating rate is controlled to be 5-10 ℃ / min.

[0010] Preferably, in step (3), the cooling rate is controlled to be 2-6 ℃ / min, and the heating rate is controlled to be 5-10 ℃ / min.

[0011] Preferably, in step (4), the cooling rate is controlled to be 2-4 ℃ / min. Compared with the prior art, the application has the following advantages: The application solves the problem of difficult recycling of waste ceramic materials and reduces the potential harm to the ecological environment. The polytetrafluoroethylene is added in the preparation process of the microcrystalline glass tube. The polytetrafluoroethylene is a high-strength corrosion-resistant polymer material, and the corrosion resistance and mechanical strength of the material can be significantly improved after adding. The microcrystalline glass tube is prepared from ceramic materials, modified by adding inorganic salts, non-toxic, no harm to the environment, comprehensive function, suitable for use in various places. DETAILED DESCRIPTION

[0012] The purpose of the application is to provide a method for preparing a microcrystalline glass tube from waste ceramic materials. The application will be further described below in conjunction with specific examples.

[0013] A method for preparing a microcrystalline glass tube from waste ceramic materials, consisting of the following materials in parts by weight: waste ceramic materials 65-75 parts, Al(OH)3 14-20 parts, Mg(OH)2 1.3-4.2 parts, BaO 1-2 parts, H3BO32-6 parts, Na2SiF61-2 parts, Na2CO31.5-3.5 parts, Li2CO31-4 parts, K2CO31-5 parts, TiO20.5-3 parts, Fe3O40.3-1.5 parts, SrO 0.3-2.0 parts, polytetrafluoroethylene 2-6 parts and carbon powder 2-6 parts.

[0014] The application solves the problem of difficult recycling of waste ceramic materials and reduces the potential harm to the ecological environment.

[0015] A method for preparing a microcrystalline glass tube from waste ceramic materials, the specific preparation method is as follows: (1) in parts by weight, mix and crush 65-75 parts of waste ceramic materials and 2-6 parts of polytetrafluoroethylene, mix with 14-20 parts of Al(OH)3, 1.3-4.2 parts of Mg(OH)2, 1-2 parts of BaO, 2-6 parts of H3BO3, 1-2 parts of Na2SiF6, 1.5-3.5 parts of Na2CO3, 1-4 parts of Li2CO3, 1-5 parts of K2CO3, 0.5-3 parts of TiO2, 0.3-1.5 parts of Fe3O4, 0.3-2.0 parts of SrO and 2-6 parts of carbon powder, to obtain a mixture; (2) heat the mixture obtained in step (1) to 1400-1600℃, and keep it in the melting furnace for 0.5-2 hours to obtain a molten glass liquid; (3) the molten glass liquid obtained in step (2) is injected into a mold, cooled to 500-650 DEG C, and kept for 1-2 hours, demolded, added to an annealing kiln, heated to 600-800 DEG C, and kept for 1-6 hours to obtain a glass tube to be processed; (4) the glass tube to be processed obtained in step (3) is cooled to 30-100 DEG C, polished and cut to obtain a glass-ceramic tube.

[0016] The polytetrafluoroethylene is added in the preparation process of the glass-ceramic tube, the polytetrafluoroethylene is a high-strength corrosion-resistant polymer material, and after being added, the corrosion resistance and mechanical strength of the material can be remarkably improved.

[0017] Preferably, in the step (1), the mesh number of the crushed waste ceramic material and polytetrafluoroethylene is 50-150.

[0018] Preferably, in the step (2), the heating rate in the heating process is controlled to be 5-10 DEG C / min.

[0019] Preferably, in the step (3), the cooling rate in the cooling process is controlled to be 2-6 DEG C / min, and the heating rate in the heating process is controlled to be 5-10 DEG C / min.

[0020] Preferably, in the step (4), the cooling rate in the cooling process is controlled to be 2-4 DEG C / min.

[0021] Preferably, a method for preparing a glass-ceramic tube by using waste ceramic material comprises the following materials in parts by weight: waste ceramic material 68-72 parts, Al(OH)3 16-18 parts, Mg(OH)2 2.1-3.4 parts, BaO 1.4-1.6 parts, H3BO3 3.3-3.9 parts, Na2SiF6 1.5-1.7 parts, Na2CO3 2.2-2.6 parts, Li2CO3 2-3 parts, K2CO3 3.2-3.8 parts, TiO2 1.1-1.6 parts, Fe3O4 0.8-1.2 parts, SrO 0.3-2.0 parts, polytetrafluoroethylene 3.5-4.3 parts and carbon powder 3-4 parts.

[0022] The glass-ceramic tube is prepared from ceramic material, modified by adding inorganic salt, non-toxic, harmless to the environment, and comprehensive in function, and is suitable for use in various places.

[0023] The waste ceramic material used in the embodiment of the application is the remaining waste of ordinary ceramic material prepared from kaolin, clay, ceramic stone, ceramic clay and the like, or the material recovered after being damaged, the content of SiO2 in the waste ceramic material is greater than 70%, and the content of Al2O3 is greater than 20%, that is, used for preparing the glass-ceramic tube after being recovered. Embodiment

[0024] A method for preparing microcrystalline glass tube by using waste ceramic material, which is composed of the following materials: waste ceramic material 65kg, Al(OH)3 14kg, Mg(OH)2 1.3kg, BaO 1kg, H3BO32kg, Na2SiF61kg, Na2CO31.5kg, Li2CO31kg, K2CO31kg, TiO20.5kg, Fe3O40.3kg, SrO 0.3kg, polytetrafluoroethylene 2kg and carbon powder 2kg. Example

[0025] A method for preparing microcrystalline glass tube by using waste ceramic material, which is composed of the following materials: waste ceramic material 75kg, Al(OH)3 20kg, Mg(OH)2 4.2kg, BaO 2kg, H3BO36kg, Na2SiF62kg, Na2CO33.5kg, Li2CO34kg, K2CO35kg, TiO23kg, Fe3O41.5kg, SrO 2.0kg, polytetrafluoroethylene 6kg and carbon powder 6kg. Example

[0026] A method for preparing microcrystalline glass tube by using waste ceramic material, which is composed of the following materials: waste ceramic material 69kg, Al(OH)3 17kg, Mg(OH)2 2.8kg, BaO 1.5kg, H3BO33.6kg, Na2SiF61.6kg, Na2CO32.4kg, Li2CO32.6kg, K2CO33.5kg, TiO21.3kg, Fe3O41.1kg, SrO 1.3kg, polytetrafluoroethylene 3.9kg and carbon powder 3.6kg. Example

[0027] A method for preparing microcrystalline glass tube by using waste ceramic material, which is composed of the following materials: waste ceramic material 68kg, Al(OH)3 16kg, Mg(OH)2 2.1kg, BaO 1.4kg, H3BO33.3kg, Na2SiF61.5kg, Na2CO32.2kg, Li2CO32kg, K2CO33.2kg, TiO21.1kg, Fe3O40.8kg, SrO 0.3kg, polytetrafluoroethylene 3.5kg and carbon powder 3kg. Example

[0028] A microcrystalline glass tube prepared from waste ceramic material, which is composed of the following materials: waste ceramic material 72 kg, Al(OH)3 18 kg, Mg(OH)2 3.4 kg, BaO 1.6 kg, H3BO3 3.9 kg, Na2SiF6 1.7 kg, Na2CO3 2.6 kg, Li2CO3 3 kg, K2CO3 3.8 kg, TiO2 1.6 kg, Fe3O4 1.2 kg, SrO 2.0 kg, polytetrafluoroethylene 4.3 kg and carbon powder 4 kg. Embodiment

[0029] A microcrystalline glass tube prepared from waste ceramic material, which is composed of the following materials: waste ceramic material 70 kg, Al(OH)3 17 kg, Mg(OH)2 2.5 kg, BaO 1.5 kg, H3BO3 3.5 kg, Na2SiF6 1.6 kg, Na2CO3 2.5 kg, Li2CO3 2.5 kg, K2CO3 3.5 kg, TiO2 1.5 kg, Fe3O4 1.0 kg, SrO 1.0 kg, polytetrafluoroethylene 4.0 kg and carbon powder 3.5 kg. Embodiment

[0030] A method for preparing a microcrystalline glass tube from waste ceramic material, which comprises the following steps: (1) mixing and crushing waste ceramic material 65 kg and polytetrafluoroethylene 2 kg, and the crushed size is 50 mesh, and mixing Al(OH)3 14 kg, Mg(OH)2 1.3 kg, BaO 1 kg, H3BO3 2 kg, Na2SiF6 1 kg, Na2CO3 1.5 kg, Li2CO3 1 kg, K2CO3 1 kg, TiO2 0.5 kg, Fe3O4 0.3 kg, SrO 0.3 kg and carbon powder 2 kg to obtain a mixture; (2) heating the mixture obtained in step (1) to 1400℃ at a heating rate of 5℃ / min, and keeping in a melting furnace for 0.5 hours to obtain a molten glass liquid; (3) injecting the molten glass liquid obtained in step (2) into a mold, cooling to 500℃ at a cooling rate of 2℃ / min, keeping for 1 hour, demolding, adding to an annealing kiln, heating to 600℃ at a heating rate of 5℃ / min, and keeping for 1 hour to obtain a glass tube to be processed; the inner diameter of the obtained glass tube is 2 mm, and the wall thickness is 0.2 mm; (4) cooling the glass tube to be processed obtained in step (3) to 30℃ at a cooling rate of 2℃ / min, and polishing and cutting to obtain a microcrystalline glass tube. Embodiment

[0031] A method for preparing microcrystalline glass tube by using waste ceramic material, comprising the following steps: (1) waste ceramic material 75 kg and polytetrafluoroethylene 6 kg are mixed and crushed, the crushed mesh size is 150 mesh, and Al(OH)3 20 kg, Mg(OH)2 4.2 kg, BaO 2 kg, H3BO3 6 kg, Na2SiF6 2 kg, Na2CO3 3.5 kg, Li2CO3 4 kg, K2CO3 5 kg, TiO2 3 kg, Fe3O4 1.5 kg, SrO 2.0 kg and carbon powder 6 kg are mixed to obtain a mixture; (2) the mixture obtained in step (1) is heated to 1600 DEG C at a heating rate of 10 DEG C / min, and is kept in a melting furnace for 2 hours to obtain molten glass liquid; (3) the molten glass liquid obtained in step (2) is injected into a mold, cooled to 650 DEG C at a cooling rate of 6 DEG C / min, kept for 2 hours, demolded, added to an annealing kiln, heated to 800 DEG C at a heating rate of 10 DEG C / min, and kept for 6 hours to obtain a glass tube to be processed; the obtained glass tube has an inner diameter of 5 mm and a wall thickness of 0.2 mm; (4) the glass tube to be processed obtained in step (3) is cooled to 100 DEG C at a cooling rate of 4 DEG C / min, and is polished and cut to obtain a microcrystalline glass tube. Embodiment

[0032] A method for preparing microcrystalline glass tube by using waste ceramic material, comprising the following steps: (1) waste ceramic material 69 kg and polytetrafluoroethylene 3.9 kg are mixed and crushed, the crushed mesh size is 100 mesh, and Al(OH)3 17 kg, Mg(OH)2 2.8 kg, BaO 1.5 kg, H3BO3 3.6 kg, Na2SiF6 1.6 kg, Na2CO3 2.4 kg, Li2CO3 2.6 kg, K2CO3 3.5 kg, TiO2 1.3 kg, Fe3O4 1.1 kg, SrO 1.3 kg and carbon powder 3.6 kg are mixed to obtain a mixture; (2) the mixture obtained in step (1) is heated to 1500 DEG C at a heating rate of 8 DEG C / min, and is kept in a melting furnace for 1.3 hours to obtain molten glass liquid; (3) the molten glass liquid obtained in step (2) is injected into a mold, cooled to 580 DEG C at a cooling rate of 4 DEG C / min, kept for 1.5 hours, demolded, added to an annealing kiln, heated to 700 DEG C at a heating rate of 8 DEG C / min, and kept for 4 hours to obtain a glass tube to be processed; the obtained glass tube has an inner diameter of 8 mm and a wall thickness of 0.3 mm; (4) cooling the glass tube obtained in step (3) to 60 ℃ at a cooling rate of 3 ℃ / min, and polishing and cutting to obtain the glass-ceramic tube. Embodiment

[0033] A method for preparing a glass-ceramic tube from waste ceramic material, comprising the following steps: (1) mixing and crushing waste ceramic material 68 kg and polytetrafluoroethylene 3.5 kg into particles with a mesh size of 50-150, and mixing with Al(OH)3 16 kg, Mg(OH)2 2.1 kg, BaO 1.4 kg, H3BO3 3.3 kg, Na2SiF6 1.5 kg, Na2CO3 2.2 kg, Li2CO3 2 kg, K2CO3 3.2 kg, TiO2 1.1 kg, Fe3O4 0.8 kg, SrO 0.3 kg, and carbon powder 3 kg to obtain a mixture; (2) heating the mixture obtained in step (1) to 1500 ℃ and keeping it in a melting furnace for 1 hour to obtain molten glass liquid; the heating rate during the heating process is controlled at 5 ℃ / min; (3) pouring the molten glass liquid obtained in step (2) into a mold, cooling to 500 ℃ at a cooling rate of 2 ℃ / min, keeping for 2 hours, demolding, and adding to an annealing kiln, and heating to 600 ℃ at a heating rate of 5 ℃ / min, and keeping for 6 hours to obtain a glass tube to be processed; the inner diameter of the obtained glass tube is 10 mm, and the wall thickness is 0.5 mm; (4) cooling the glass tube to be processed obtained in step (3) to 40 ℃, and polishing and cutting to obtain a glass-ceramic tube. Embodiment

[0034] A method for preparing a glass-ceramic tube from waste ceramic material, comprising the following steps: (1) mixing and crushing waste ceramic material 72 kg and polytetrafluoroethylene 4.3 kg into particles with a mesh size of 50-150, and mixing with Al(OH)3 18 kg, Mg(OH)2 3.4 kg, BaO 1.6 kg, H3BO3 3.9 kg, Na2SiF6 1.7 kg, Na2CO3 2.6 kg, Li2CO3 3 kg, K2CO3 3.8 kg, TiO2 1.6 kg, Fe3O4 1.2 kg, SrO 2.0 kg, and carbon powder 4 kg to obtain a mixture; (2) heating the mixture obtained in step (1) to 1400 ℃ and keeping it in a melting furnace for 1.5 hours to obtain molten glass liquid; the heating rate during the heating process is controlled at 10 ℃ / min (3) The molten glass liquid obtained in step (2) is injected into a mold, cooled to 650℃ at a cooling rate of 6℃ / min, cooled to 650℃, kept for 1 hour, demolded, added to an annealing kiln, heated to 800℃ at a heating rate of 10℃ / min, and kept for 1 hour, to obtain a glass tube to be processed; the glass tube obtained has an inner diameter of 8 mm and a wall thickness of 0.4 mm; (4) The glass tube to be processed obtained in step (3) is cooled to 50℃, polished and cut to obtain a glass-ceramic tube. Example

[0035] A method for preparing a glass-ceramic tube from waste ceramic material, comprising the following steps: (1) Waste ceramic material 70 kg and polytetrafluoroethylene 4 kg are mixed and crushed into particles with a particle size of 50-150 mesh, and mixed with Al(OH)3 17 kg, Mg(OH)2 2.5 kg, BaO 1.5 kg, H3BO3 3.5 kg, Na2SiF6 1.6 kg, Na2CO3 2.5 kg, Li2CO3 2.5 kg, K2CO3 3.5 kg, TiO2 1.5 kg, Fe3O4 1.0 kg, SrO 1.0 kg and carbon powder 3.5 kg, to obtain a mixture; (2) The mixture obtained in step (1) is heated to 1450℃ and kept in a melting furnace for 1.5 hours to obtain a molten glass liquid; the heating rate during heating is controlled at 8℃ / min (3) The molten glass liquid obtained in step (2) is injected into a mold, cooled to 650℃ at a cooling rate of 6℃ / min, cooled to 650℃, kept for 1 hour, demolded, added to an annealing kiln, heated to 800℃ at a heating rate of 10℃ / min, and kept for 1 hour, to obtain a glass tube to be processed; the glass tube obtained has an inner diameter of 8 mm and a wall thickness of 0.4 mm; (4) The glass tube to be processed obtained in step (3) is cooled to 50℃, polished and cut to obtain a glass-ceramic tube.

[0036] The properties of the glass-ceramic tubes prepared in Examples 7-12 of the present application were tested and compared with commercially available glass tubes (comparative examples), wherein the acid used in the acid resistance test was 98% sulfuric acid by mass concentration, the alkali used in the alkali resistance test was 20% sodium hydroxide by mass concentration, and the results are shown in Table 1: Table 1. Properties of the glass-ceramic tubes prepared in Examples 7-12 of the present application

[0037] According to the test results in Table 1, the microcrystalline glass tubes prepared in Examples 7-12 of the present application have good acid and alkali corrosion resistance, and the performance is comparable to that of the comparative examples. However, the microcrystalline glass tubes prepared in the present application have low density, indicating that the length of the glass tube can be made longer under the same mass. The microcrystalline glass tubes prepared in the present application also have high bending strength and impact toughness, and higher hardness, indicating that the mechanical properties of the microcrystalline glass tubes are excellent. In addition, under the same conditions, the microcrystalline glass tubes of the present application have a smaller wear coefficient and better wear resistance.

Claims

1. A glass-ceramic tube prepared using waste ceramic material, characterized in that: 65~75 parts of waste ceramic material, 14~20 parts of Al(OH)3, 1.3~4.2 parts of Mg(OH)2, 1~2 parts of BaO, 2~6 parts of H3BO3, 1~2 parts of Na2SiF6, 1.5~3.5 parts of Na2CO3, 1~4 parts of Li2CO3, 1~5 parts of K2CO3, 0.5~3 parts of TiO2, 0.3~1.5 parts of Fe3O4, 0.3~2.0 parts of SrO, 2~6 parts of polytetrafluoroethylene and 2~6 parts of carbon powder, by weight.

2. The microcrystalline glass tube prepared from waste ceramic material according to claim 1, characterized in that: 68~72 parts of waste ceramic material, 16~18 parts of Al(OH)3, 2.1~3.4 parts of Mg(OH)2, 1.4~1.6 parts of BaO, 3.3~3.9 parts of H3BO3, 1.5~1.7 parts of Na2SiF6, 2.2~2.6 parts of Na2CO3, 2~3 parts of Li2CO3, 3.2~3.8 parts of K2CO3, 1.1~1.6 parts of TiO2, 0.8~1.2 parts of Fe3O4, 0.3~2.0 parts of SrO, 3.5~4.3 parts of polytetrafluoroethylene and 3~4 parts of carbon powder, by weight.

3. The method for preparing microcrystalline glass tube by using waste ceramic material according to claim 1, characterized in that: comprising the following steps: (1) mixing and crushing 65~75 parts of waste ceramic material and 2~6 parts of polytetrafluoroethylene, by weight, with 14~20 parts of Al(OH)3, 1.3~4.2 parts of Mg(OH)2, 1~2 parts of BaO, 2~6 parts of H3BO3, 1~2 parts of Na2SiF6, 1.5~3.5 parts of Na2CO3, 1~4 parts of Li2CO3, 1~5 parts of K2CO3, 0.5~3 parts of TiO2, 0.3~1.5 parts of Fe3O4, 0.3~2.0 parts of SrO and 2~6 parts of carbon powder, by weight, to obtain a mixture; (2) heating the mixture obtained in step (1) to 1400~1600℃, and holding in a melting furnace for 0.5~2 hours to obtain a molten glass liquid; (3) pouring the molten glass liquid obtained in step (2) into a mold, cooling to 500~650℃, holding for 1~2 hours, demolding, adding to an annealing kiln, heating to 600~800℃, and continuing to hold for 1~6 hours to obtain a glass tube to be processed; (4) cooling the glass tube to be processed obtained in step (3) to 30~100℃, and polishing and cutting to obtain a glass-ceramic tube.

4. The method for preparing microcrystalline glass tube by using waste ceramic material according to claim 3, characterized in that: In the first step, the waste ceramic material and the polytetrafluoroethylene are crushed to a mesh size of 50~150 mesh.

5. The method for preparing microcrystalline glass tube by using waste ceramic material according to claim 3, characterized in that: In the second step, the heating rate during heating is controlled to be 5~10℃ / min.

6. The method for preparing microcrystalline glass tube by using waste ceramic material according to claim 3, characterized in that: In the third step, the cooling rate during cooling is controlled to be 2~6℃ / min, and the heating rate during heating is controlled to be 5~10℃ / min.

7. The method for preparing microcrystalline glass tube by using waste ceramic material according to claim 3, characterized in that: In the fourth step, the cooling rate during cooling is controlled to be 2~4℃ / min.

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