Geopolymer amorphous refractory material, its preparation method and application

Abstract

The application belongs to the technical field of refractory materials, and relates to a geopolymer amorphous refractory material and a preparation method and application thereof. The geopolymer amorphous refractory material comprises a binder, fine aggregate and coarse aggregate; the binder is a solid waste base geopolymer; the fine aggregate is silicon manganese slag; and the coarse aggregate is silicon carbide particles; and the mass ratio of the solid waste base geopolymer, the silicon manganese slag and the silicon carbide particles is 1:1-2:1-4. The main raw material of the application is industrial solid waste, which greatly reduces the production cost. When applied to a ladle, the application has the characteristics of overall compactness, strong adhesion, anti-peeling and high-temperature resistance, can withstand nearly 100 times of actual iron alloy liquid scouring and transfer, and can extend the ladle repair cycle from two days to 10 days, greatly reducing the working intensity of workers and enhancing the safety of material and equipment use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of refractory materials, and relates to a geopolymer amorphous refractory material and a preparation method and application thereof. BACKGROUND

[0002] In the process of ferroalloy production, the ladle is the main equipment for tapping from the furnace of the submerged arc furnace. The quality of the ladle, especially the quality of the internal refractory material, directly affects the safety during use, the recovery rate of molten iron and the workload of repairing the ladle. The service life of the ladle is directly related to the lining material and the construction method. The traditional ladle for ferroalloy production is composed of a steel shell and an internal lining refractory material. The internal lining refractory material is usually constructed by clay bricks or high alumina bricks. However, there are many problems in the use process, such as low safety factor, frequent penetration accidents and even leakage accidents, each leakage accident causing a loss of at least 10,000 yuan, and bringing great hidden dangers to the safety of people and equipment around the ladle. Secondly, the ladle is seriously stuck with iron alloy, and a large amount of iron alloy is treated with slag during use, thereby reducing the utilization rate of the product and causing great waste.

[0003] In order to reduce the occurrence of penetration accidents, the refractory material of the ladle in the ferroalloy industry is currently divided into two layers of internal and external structures. The external layer belongs to the permanent layer, that is, the refractory brick mentioned above, which does not directly contact with the molten iron. The internal layer is an amorphous refractory material applied on the refractory brick of the ladle, which directly contacts with the molten iron. After a certain number of pouring times, the internal layer will be damaged, and at this time, the amorphous refractory material needs to be used to repair the ladle. The amorphous refractory material currently used on the market is mainly aluminum-silicon carbide castable. It is mainly composed of high-quality high alumina bauxite clinker and silicon carbide, and added with pure aluminate cement binder, dispersing agent, shrinkage preventing agent, coagulant, and explosion-proof fiber. Because the material uses cement as the binder, the service life is short (20-25 times), the ladle needs to be repaired frequently, the working intensity of workers is large, and there is a great safety hazard. In addition, the refractory material has a high price, and the basic price fluctuates around 2,500 yuan / ton.

[0004] A carbonaceous amorphous refractory material applied to a ladle is reported in Chinese invention patent CN108101556A, the composition of the carbonaceous amorphous refractory material includes: refractory aggregate, powder, binder, the refractory aggregate is silica, the powder includes quartz sand, fly ash and metallurgical coke powder, the binder includes coal pitch, and the mass fraction of each component is as follows: silica: quartz sand: fly ash: metallurgical coke powder: coal pitch = 40-60 parts: 5-10 parts: 10-20 parts: 10-20 parts: 5 parts. Chinese invention patent CN104478454A discloses a refractory material for a ladle and a preparation method thereof, the refractory material is prepared from the following raw materials in weight percentage: fused corundum 35-63%, andalusite 12-35%, Guangxi white clay 5-10%, silicon carbide 7-16%, alumina micropowder 3-8%, and antioxidant metal 2-4%. The refractory material for the ladle of the application presents a multiphase non-homogeneous system in the microstructure in combination of the polycrystalline agglomerates of mullite generated by calcining andalusite and the mineral phase of fused corundum itself, but the refractory material has high porosity, poor density, and relatively weak resistance to molten iron impact and slag penetration. Chinese invention patent CN109180207A discloses a refractory material for a ladle and a preparation method thereof, which is composed of the following raw materials in weight parts: fused corundum 30-40 parts, clay 35-40 parts, river sand 120-150 parts, coke fines 20-24 parts, and modified refractory binder 5-7 parts. The modified refractory binder of the application has a complicated preparation procedure and needs high-temperature heat treatment; and high-temperature drying is also needed in the preparation of the refractory material, which increases the production difficulty and cost.

[0005] Therefore, it is of great practical significance to develop a refractory material with excellent performance and suitable price. SUMMARY

[0006] In view of the technical problems of short service life of the existing refractory material and high production and maintenance cost, the purpose of the present application is to provide a geopolymer amorphous refractory material, a preparation method and application thereof. The geopolymer amorphous refractory material prepared by the method has excellent high-temperature resistance, thermal shock resistance, anti-spalling, long service life and low cost.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0008] The present application provides a geopolymer amorphous refractory material, which comprises a binder, fine aggregate and coarse aggregate; the binder is a solid waste-based geopolymer; the fine aggregate is silicon-manganese slag; the coarse aggregate is silicon carbide particles; and the mass ratio of the solid waste-based geopolymer, silicon-manganese slag and silicon carbide particles is 1:1-2:1-4.

[0009] Preferably, the solid waste-based geopolymer is obtained by the reaction of sodium hydroxide, microsilica powder, fly ash and water.

[0010] Preferably, the mass ratio of sodium hydroxide, micro-silica powder and fly ash is 1:2-5:5-10.

[0011] Preferably, the mass ratio of water to the sum of sodium hydroxide, micro-silica powder and fly ash is 0.35-0.6:1.

[0012] Preferably, the silicon-aluminum molar ratio in the solid waste-based geopolymer is 1-2.8.

[0013] Preferably, the silicon carbide particles have a particle size of 1-5mm and a purity of >85%.

[0014] Preferably, the silicon-manganese slag has a particle size of 0.3-1mm.

[0015] Preferably, the fly ash is F-grade, has a particle size of <100um and a loss on ignition of <5%.

[0016] Preferably, the micro-silica powder has a particle size of <100um, a silicon dioxide content of >85wt% and a loss on ignition of <5%.

[0017] Preferably, the sodium hydroxide has a purity of >95%.

[0018] The application also provides a preparation method of the geopolymer amorphous refractory material, comprising the following steps:

[0019] S1: dissolving sodium hydroxide in water, then adding fly ash and micro-silica powder and mixing uniformly to obtain a solid waste-based geopolymer;

[0020] S2: adding silicon-manganese slag and silicon carbide particles to the solid waste-based geopolymer of step S1 and mixing uniformly to obtain a geopolymer amorphous refractory material.

[0021] The application also provides the use of the geopolymer amorphous refractory material in a ladle.

[0022] Preferably, the application method of the geopolymer amorphous refractory material comprises the following steps: forming the geopolymer amorphous refractory material by coating, preparing a geopolymer amorphous refractory material lining, curing the geopolymer amorphous refractory material lining and baking to obtain the geopolymer amorphous refractory material for a ladle.

[0023] Preferably, the thickness of the geopolymer amorphous refractory material lining is 50-100mm.

[0024] Preferably, the curing is performed at a temperature of 40-80℃ and a humidity of 75-95% for 4-12h.

[0025] Preferably, the baking is performed for 4-12h at a temperature of 100-200℃.

[0026] The aluminosilicate glass body in solid waste is depolymerized and polycondensed under alkaline conditions to form an amorphous silicon-aluminum network zeolite structure, so that the geopolymer has a ceramic-like characteristic. Since the main raw material of the geopolymer is industrial solid waste, the production cost can be greatly reduced. The excellent high-temperature resistance can be obtained in the suitable interval of the silicon-aluminum ratio in the geopolymer, and the problems of short service life and repeated repair of conventional amorphous refractory materials are solved.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] 1. The industrial solid waste fly ash and microsilica powder are used to prepare the geopolymer, and the solid waste silicon-manganese slag is used as fine aggregate, so that the production cost of the amorphous refractory material is greatly reduced.

[0029] 2. The geopolymer has good fluidity and cohesiveness, can well wrap and bond the fine aggregate and coarse aggregate, and can have a strong bonding effect with the refractory bricks, so as to improve the overall strength and anti-stripping performance of the amorphous refractory material.

[0030] 3. The geopolymer as a binder can produce very high bonding strength only by curing at 40-80 DEG C, without the need for high-temperature baking, so that the period, difficulty and cost of the lining repair are greatly reduced.

[0031] 4. The coarse aggregate and fine aggregate are used in combination with the geopolymer, and different particle sizes of the solid waste can be obtained by particle grading, so that the amorphous refractory material is more dense, the porosity after drying is reduced, and the melt penetration is avoided.

[0032] 5. The geopolymer replaces the cement as a binder, greatly improves the use temperature and high-temperature performance of the amorphous refractory material, prolongs the service life, and reduces the repair frequency.

[0033] 6. The geopolymer amorphous refractory material is dense, has strong cohesiveness, is anti-stripping and high-temperature resistant after baking, can withstand nearly 100 times of actual iron alloy liquid transfer, can extend the repair period from 2 days to 10 days, greatly reduces the working intensity of workers, and enhances the use safety. DETAILED DESCRIPTION

[0034] The following non-limiting examples can make those skilled in the art more fully understand the present application, but do not limit the present application in any way. The following content is only an exemplary description of the scope of the present application, and those skilled in the art can make various changes and modifications to the present application according to the disclosed content, and it should also belong to the scope of the present application.

[0035] The application will be further described in the manner of specific examples. The various chemical reagents used in the examples of the application are obtained by conventional commercial routes unless otherwise specified. The amounts described below are mass amounts.

[0036] The silicon carbide powder is purchased from Ordos Dongxiang Silicon Carbide Co., Ltd., a first-grade product; the fly ash, microsilica powder, and silicon manganese slag are all from Inner Mongolia Ordos Electric Power Metallurgical Group Co., Ltd., the mass fraction of alumina in the fly ash is 38%, and the mass fraction of silicon oxide is 46%; the mass fraction of silicon oxide in the microsilica powder is 86%; the sodium hydroxide is commercially available sodium hydroxide with a purity of >95%.

[0037] The mixing machine used is a SZH double-cone mixer produced by Nanjing Youfeng Drying Equipment Co., Ltd.

[0038] Example 1

[0039] A geopolymer amorphous refractory material, comprising, by weight parts, 1 part of a solid waste-based geopolymer (binder), 1.5 parts of silicon manganese slag (fine aggregate), and 3 parts of silicon carbide particles (coarse aggregate). The solid waste-based geopolymer is obtained by reacting, by weight parts, 1 part of sodium hydroxide, 3 parts of microsilica powder, 7 parts of fly ash, and 5.5 parts of water. The ratio of fly ash to microsilica powder is such that the molar ratio of silicon to aluminum in the solid waste-based geopolymer is 1.85.

[0040] The particle size of the silicon carbide particles is 1-5 mm, and the purity is >85%; the particle size of the silicon manganese slag is 0.3-1 mm; the fly ash is F-grade, the particle size is <100 μm, and the loss on ignition is <5%; the particle size of the microsilica powder is <100 μm, the silicon dioxide is >85 wt%, and the loss on ignition is <5%; the purity of the sodium hydroxide is >95%.

[0041] A preparation method of a geopolymer amorphous refractory material, comprising the following steps:

[0042] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica powder and mixing for 10 min until completely uniform to obtain a solid waste-based geopolymer;

[0043] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1 and mixing in a blender for 10 min until completely uniform to obtain a geopolymer amorphous refractory material.

[0044] An application method of the geopolymer amorphous refractory material in a ladle, comprising the following steps:

[0045] The geopolymer amorphous refractory material is formed by coating to prepare an amorphous refractory material lining with a thickness of 80 mm, the geopolymer amorphous refractory material lining is placed in a humidity environment of 60℃ and 95% for 6 hours, and baked at 150℃ for 6 hours to obtain the geopolymer amorphous refractory material for the ladle.

[0046] Example 2

[0047] A geopolymer amorphous refractory material, comprising 1 part of solid waste base polymer (binder), 2 parts of silicon manganese slag (fine aggregate), and 2 parts of silicon carbide particles (coarse aggregate) by weight. The solid waste base polymer is obtained by reacting 1 part of sodium hydroxide, 3 parts of microsilica, 7 parts of fly ash, and 5.5 parts of water by weight. The ratio of fly ash and microsilica makes the silicon-aluminum molar ratio in the solid waste base polymer 1.85. The particle size of the silicon carbide particles is 1-5 mm, and the purity is >85%; the particle size of the silicon manganese slag is 0.3-1 mm; the fly ash is F-grade, the particle size is <100 μm, and the loss on ignition is <5%; the microsilica has a particle size of <100 μm, the silicon dioxide is >85wt%, and the loss on ignition is <5%; the purity of sodium hydroxide is >95%.

[0048] A preparation method of a geopolymer amorphous refractory material, comprising the following steps:

[0049] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica and mixing for 10 minutes until completely uniform to obtain a solid waste base polymer;

[0050] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1 and mixing in a blender for 10 minutes until completely uniform to obtain a geopolymer amorphous refractory material.

[0051] The application method of the geopolymer amorphous refractory material in a ladle, comprising the following steps:

[0052] The geopolymer amorphous refractory material is formed by coating to prepare an amorphous refractory material lining with a thickness of 80 mm, the geopolymer amorphous refractory material lining is placed in a humidity environment of 60℃ and 95% for 6 hours, and baked at 150℃ for 6 hours to obtain the geopolymer amorphous refractory material for the ladle.

[0053] Example 3

[0054] A geopolymer amorphous refractory material, comprising 1 part of solid waste base geopolymer (binder), 1.5 parts of silicon manganese slag (fine aggregate), and 3 parts of silicon carbide particles (coarse aggregate) by weight. The solid waste base geopolymer is obtained by reacting 1 part of sodium hydroxide, 2 parts of microsilica, 8 parts of fly ash, and 6.6 parts of water by weight. The ratio of fly ash and microsilica makes the silicon-aluminum molar ratio in the solid waste base geopolymer 1.51. The particle size of the silicon carbide particles is 1-5 mm, and the purity is > 85%; the particle size of the silicon manganese slag is 0.3-1 mm; the fly ash is F-grade, the particle size is < 100 μm, and the loss on ignition is < 5%; the particle size of the microsilica is < 100 μm, the silicon dioxide is > 85 wt%, and the loss on ignition is < 5%; and the purity of sodium hydroxide is > 95%.

[0055] A method for preparing a geopolymer amorphous refractory material, comprising the following steps:

[0056] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica and mixing for 10 min to be completely uniform to obtain a solid waste base geopolymer;

[0057] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1 and mixing in a blender for 10 min to be completely uniform to prepare a geopolymer amorphous refractory material.

[0058] A method for applying the geopolymer amorphous refractory material in a ladle, comprising the following steps:

[0059] The geopolymer amorphous refractory material is formed by smearing to prepare an amorphous refractory lining with a thickness of 80 mm, the geopolymer amorphous refractory lining is placed in a humidity environment of 60℃ and 95% for 6 h, and is baked at 150℃ for 6 h to obtain the geopolymer amorphous refractory material for the ladle.

[0060] Example 4

[0061] A geopolymer amorphous refractory material, comprising 1 part of solid waste base geopolymer (binder), 1.5 parts of silicon manganese slag (fine aggregate), and 3 parts of silicon carbide particles (coarse aggregate) by weight. The solid waste base geopolymer is obtained by reacting 1 part of sodium hydroxide, 3 parts of microsilica, 7 parts of fly ash, and 5.5 parts of water by weight. The ratio of fly ash and microsilica makes the silicon-aluminum molar ratio in the solid waste base geopolymer 1.85. The particle size of the silicon carbide particles is 1-5 mm, and the purity is > 85%; the particle size of the silicon manganese slag is 0.3-1 mm; the fly ash is F-grade, the particle size is < 100 μm, and the loss on ignition is < 5%; the particle size of the microsilica is < 100 μm, the silicon dioxide is > 85 wt%, and the loss on ignition is < 5%; and the purity of sodium hydroxide is > 95%.

[0062] A method for preparing a geopolymer amorphous refractory material, comprising the following steps:

[0063] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica powder and mixing for 10 min to be completely uniform to obtain a solid waste-based geopolymer;

[0064] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1 and mixing in a blender for 10 min to be completely uniform to obtain a geopolymer amorphous refractory material.

[0065] The application method of the geopolymer amorphous refractory material in a ladle includes the following steps:

[0066] The geopolymer amorphous refractory material is formed by smearing to prepare an amorphous refractory material lining with a thickness of 60 mm, the geopolymer amorphous refractory material lining is placed in a humidity environment of 80℃ and 95% for 4 h, and is baked at 100℃ for 12 h to obtain the geopolymer amorphous refractory material for the ladle.

[0067] Example 5

[0068] A geopolymer amorphous refractory material contains 1 part of a solid waste-based geopolymer (binder) and 1 part of silicon manganese slag (fine aggregate) and 1 part of silicon carbide particles (coarse aggregate) by weight. The solid waste-based geopolymer is obtained by reacting 1 part of sodium hydroxide, 5 parts of microsilica powder, 10 parts of fly ash and 8 parts of water by weight. The ratio of fly ash and microsilica powder makes the molar ratio of silicon and aluminum in the solid waste-based geopolymer 1.98. The particle size of the silicon carbide particles is 1-5 mm, and the purity is > 85%; the particle size of the silicon manganese slag is 0.3-1 mm; the fly ash is F-grade, the particle size is < 100 μm, and the loss on ignition is < 5%; the microsilica powder has a particle size of < 100 μm, a silicon dioxide content of > 85 wt%, and a loss on ignition of < 5%; the sodium hydroxide has a purity of > 95%.

[0069] A preparation method of a geopolymer amorphous refractory material includes the following steps:

[0070] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica powder and mixing for 10 min to be completely uniform to obtain a solid waste-based geopolymer;

[0071] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1 and mixing in a blender for 10 min to be completely uniform to obtain a geopolymer amorphous refractory material.

[0072] The application method of the geopolymer amorphous refractory material in a ladle includes the following steps:

[0073] The geopolymer amorphous refractory material is formed by coating and molding to prepare an amorphous refractory lining with a thickness of 80 mm, the geopolymer amorphous refractory lining is placed in a 40℃, 75% humidity environment for 6h, and baked at 200℃ for 4h to obtain the geopolymer amorphous refractory material for the ladle.

[0074] Example 6

[0075] A geopolymer amorphous refractory material, comprising 1 part of solid waste base polymer (binder), 1 part of silicon manganese slag (fine aggregate), and 4 parts of silicon carbide particles (coarse aggregate) by weight. The solid waste base polymer is obtained by reacting 1 part of sodium hydroxide, 4 parts of microsilica powder, 5 parts of fly ash, and 6 parts of water by weight. The ratio of fly ash and microsilica powder makes the silicon aluminum molar ratio in the solid waste base polymer 2.55. The particle size of the silicon carbide particles is 1-5mm, and the purity is >85%; the particle size of the silicon manganese slag is 0.3-1mm; the fly ash is F-grade, the particle size is <100μm, and the loss on ignition is <5%; the microsilica powder has a particle size of <100μm, a silicon dioxide content of >85wt%, and a loss on ignition of <5%; the sodium hydroxide has a purity of >95%.

[0076] A preparation method of a geopolymer amorphous refractory material, comprising the following steps:

[0077] S1, dissolving sodium hydroxide in water, then adding fly ash and microsilica powder and mixing for 10min to completely uniform, obtaining a solid waste base polymer;

[0078] S2, adding silicon manganese slag and silicon carbide particles to the geopolymer of step S1, mixing in a blender for 10min to completely uniform, obtaining a geopolymer amorphous refractory material.

[0079] The application method of the geopolymer amorphous refractory material in a ladle, comprising the following steps:

[0080] The geopolymer amorphous refractory material is formed by coating and molding to prepare an amorphous refractory lining with a thickness of 80 mm, the geopolymer amorphous refractory lining is placed in a 40℃, 75% humidity environment for 6h, and baked at 200℃ for 4h to obtain the geopolymer amorphous refractory material for the ladle.

[0081] Comparative Example 1

[0082] The difference between this comparative example and Example 1 is that the raw material composition is different, specifically, a geopolymer amorphous refractory material, comprising 1 part of solid waste base polymer (binder), 3 parts of silicon manganese slag (fine aggregate), and 5 parts of silicon carbide particles (coarse aggregate) by weight.

[0083] Comparative Example 2

[0084] The difference between the present comparative example and Example 1 is that the solid waste-based polymer is obtained by reacting 1 part of sodium hydroxide, 6 parts of microsilica powder, 12 parts of fly ash and 9.5 parts of water.

[0085] Comparative Example 3

[0086] The difference between the present comparative example and Example 1 is that the amount of water used to prepare the solid waste-based polymer is different, specifically, the mass ratio of water to the sum of sodium hydroxide, microsilica powder and fly ash is 0.25:1, and the weight parts of water is 2.75 parts.

[0087] Comparative Example 4

[0088] The difference between the present comparative example and Example 1 is that the molar ratio of silicon to aluminum in the solid waste-based polymer is 3.87, wherein the weight parts of fly ash is 4 parts and the weight parts of microsilica powder is 6 parts.

[0089] Comparative Example 5

[0090] The difference between the present comparative example and Example 1 is that the fly ash is C-grade.

[0091] Comparative Example 6

[0092] The difference between the present comparative example and Example 1 is that the thickness of the monolithic refractory lining prepared in step S3 is 130 mm.

[0093] Effect performance test

[0094] 1. Test method

[0095] The refractoriness of the solid waste-based polymer monolithic refractory is tested in the laboratory according to GB / T 7322-2007 “Refractory refractoriness test method”. The resistance to 1500℃ high temperature thermal shock (times), the oxidation resistance and the repair cycle are evaluated according to the actual use of the monolithic refractory.

[0096] 2. Test results

[0097] The test results of Examples 1-4 and Comparative Examples 1-6 are shown in Table 1.

[0098] Table 1

[0099]

[0100] According to the results in Table 1: compared with Example 1, the content of the binder solid waste-based polymer in Comparative Example 1 is too small relative to the fine aggregate silicon-manganese slag and the coarse aggregate silicon carbide particles, so that it cannot form a relatively complete coating and bonding to the aggregate during the later smearing, and the aggregate particles are prone to fall off from the bonding during the later use, thereby shortening the service life and the repair cycle.

[0101] Compared with example 1, the content of sodium hydroxide in comparative example 2 is relatively small compared with microsilica and fly ash, and the ideal activation effect cannot be achieved during the maintenance after smearing. Therefore, the binding effect of the solid waste geopolymer as a binder is weakened, and the service life and repair period are shortened.

[0102] Compared with example 1, the content of water added in comparative example 3 is small, which affects the activation effect of the geopolymer on the one hand, and affects the fluidity of the unshaped refractory on the other hand, thereby affecting the uniformity of the smeared refractory and the adhesion with the refractory bricks, and shortening the service life and repair period.

[0103] Compared with example 1, the ratio of fly ash to microsilica is changed in comparative example 4, so that the molar ratio of silicon to aluminum in the solid waste geopolymer is 3.87. After alkali activation, the component cannot form a zeolite structure of the solid waste geopolymer, and the obtained solid waste geopolymer has low refractoriness and cannot withstand multiple high-temperature pouring, thereby shortening the service life and repair period.

[0104] Compared with example 1, the fly ash in comparative example 5 is C-grade fly ash, which contains more calcium oxide in the component, so that the refractoriness is low and cannot withstand multiple high-temperature pouring, thereby shortening the service life and repair period.

[0105] Compared with example 1, the lining thickness of the unshaped refractory in comparative example 6 is 130mm, which is relatively thick. During long-term pouring, interface stress is easily generated, cracks and crack propagation are generated, and finally the unshaped refractory is peeled off and fails from the refractory bricks, thereby shortening the service life and repair period.

[0106] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A geopolymer amorphous refractory material, characterized in that, The geopolymer amorphous refractory material is composed of a binder, fine aggregate and coarse aggregate; the binder is a solid waste-based polymer; the fine aggregate is silicon manganese slag; the coarse aggregate is silicon carbide particles; the mass ratio of the solid waste-based polymer, silicon manganese slag and silicon carbide particles is 1:1-2:1-4; the solid waste-based polymer is obtained by the reaction of sodium hydroxide, microsilica powder, fly ash and water; The solid waste-based polymer is obtained by the reaction of 1 part of sodium hydroxide, 2-5 parts of microsilica powder, 5-10 parts of fly ash and water by weight; The mass ratio of water to the sum of sodium hydroxide, microsilica powder and fly ash is 0.35-0.6:1; The silicon-aluminum molar ratio in the solid waste-based polymer is 1-2.8; The fly ash is F-grade, with a particle size of <100 μm and a loss on ignition of <5%.

2. The geopolymer amorphous refractory material according to claim 1, wherein, The silicon carbide particles have a particle size of 1-5 mm and a purity of >85%; The silicon manganese slag has a particle size of 0.3-1 mm; The microsilica powder has a particle size of <100 μm, a silicon dioxide content of >85 wt% and a loss on ignition of <5%; The sodium hydroxide has a purity of >95%.

3. Process for the production of geopolymer amorphous refractory materials according to any one of claims 1-2, characterized in that, The method comprises the following steps: S1: Dissolve sodium hydroxide in water, then add fly ash and microsilica powder and mix uniformly to obtain a solid waste-based polymer; S2: Add silicon manganese slag and silicon carbide particles to the solid waste-based polymer obtained in step S1 and mix uniformly to obtain a geopolymer amorphous refractory material.

4. Use of the geopolymer amorphous refractory material according to any one of claims 1-2 or prepared by the preparation method of claim 3 in a ladle.

5. Use according to claim 4, characterized in that, The method for using the geopolymer amorphous refractory material comprises the following steps: The geopolymer amorphous refractory material is formed by coating to prepare a geopolymer amorphous refractory material lining, and then the geopolymer amorphous refractory material lining is cured and baked to obtain a geopolymer amorphous refractory material for a ladle.

6. Use according to claim 5, characterized in that, The thickness of the geopolymer amorphous refractory material lining is 50-100 mm.

7. Use according to claim 5, characterized in that, The curing is performed at a temperature of 40-80℃, a humidity of 75-95% and for a time of 4-12 h; the baking is performed for a time of 4-12 h at a temperature of 100-200℃.

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