A kind of adhesive for embedding ladle nozzle brick and steel shell and its preparation method

Abstract

The present application provides a kind of mosaic steel ladle nozzle brick and steel shell adhesive and its preparation method.The present application realizes the comprehensive performance improvement of steel ladle nozzle brick and steel shell adhesive from the aspects of construction performance, curing strength, bonding and sealing, structure protection, safety stability and process adaptability, etc. by the synergistic compatibility of quartz sand, olivine, bentonite, thermosetting resin powder and modified solid dihydrogen powder. The adhesive has suitable viscosity and good plasticity after adding water, uniform texture, non-stick tool, easy to spread and fill, can quickly fill the gap between the nozzle brick and steel shell, no hollow, no omission, greatly improves the installation efficiency, ensures the precise positioning of nozzle brick, installation in place, without deviation, jamming and other problems. At the same time, the adhesive layer structure is dense, the porosity is low after drying and curing, has high mechanical strength and impact resistance, can withstand the external force of steel ladle nozzle installation, without loose, powdering and dropping.

Description

Technical Field

[0001] This invention belongs to the field of refractory materials technology, and in particular relates to an adhesive for embedding steel ladle drain outlet bricks and steel shells and its preparation method. Background Technology

[0002] The ladle outlet is a key functional component in continuous casting steelmaking. The bonding quality between the outlet brick and the outer steel shell directly determines the safety and service life of the ladle. Currently, the industry generally uses external force to strike the top sleeve to achieve the installation and positioning of the ladle outlet brick, which places stringent requirements on the matching adhesive.

[0003] Existing adhesives for bonding steel ladle drain outlet bricks and steel shells generally suffer from defects such as insufficient high-temperature strength, poor resistance to mechanical impact, and difficulty in balancing plasticity and workability. Under the impact of external forces during installation, the adhesive is prone to loosening, pulverizing, and falling off, resulting in gaps and voids between the drain outlet bricks and the steel shell. This leads to the failure of the bond between the two, separation, and loosening. During use, the drain outlet may move up and down, which can cause serious safety accidents such as molten steel leakage from the mating surface between the drain outlet and the sliding plate, burning of the mechanism, and steel leakage.

[0004] From the perspective of performance requirements, the adhesive material for bonding the ladle drain outlet bricks and the steel shell must simultaneously meet the following requirements: full filling and convenient construction; good adhesion and plasticity after adding water, making it easy to apply and fill on-site; sufficient mechanical strength after drying and curing, able to withstand installation impacts without shattering; and able to effectively protect the drain outlet bricks, preventing brick breakage and eliminating molten steel leakage. Existing refractory adhesives cannot simultaneously meet the above requirements for construction performance, mechanical properties, and safety protection, which seriously restricts the stable use and repeated use of ladle drain outlets. Summary of the Invention

[0005] In view of this, the present invention aims to provide an adhesive for embedding steel ladle drain bricks and steel shells and its preparation method.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: An adhesive for embedding steel ladle drain outlet bricks to steel shells, comprising the following components by weight percentage: 20%–30% 1-0.5mm quartz sand; 10%–30% 0.5-0mm quartz sand; 20%–30% 320-mesh quartz powder; 10%–20% 0.5-0mm olivine; 10%–20% 320-mesh olivine; and additional components: 1%–5% 320-mesh bentonite, 0.1%–2% 200-mesh thermosetting resin powder, 5%–9% 200-mesh modified solid hydrogen powder, and 8%–15% clean water.

[0007] Preferably, the quartz sand has a SiO2 mass percentage content ≥98.0%, an Fe2O3 mass percentage content ≤0.9%, and a sum of Na2O and K2O mass percentage contents ≤0.06%.

[0008] Preferably, the olivine contains ≥38% SiO2 by mass, ≤12% Fe2O3 by mass, and ≥45% MgO by mass.

[0009] Preferably, the bentonite contains SiO2 by mass percentage ≥ 45.0%, Al2O3 by mass percentage 26%–36%, the sum of Na2O and K2O by mass percentage ≤ 1%, and Fe2O3 by mass percentage ≤ 0.8%.

[0010] Preferably, the thermosetting resin powder has a moisture content of ≤2% and a polymerization rate of 45s to 85s at 150°C.

[0011] The method for preparing the adhesive for embedding the drain outlet brick of the steel ladle to the steel shell includes the following steps: Step (1): Raw material procurement and inspection: Procurement and inspection of raw materials in accordance with technical standards, and only those that pass the inspection can be put into use; Step (2): Dry mixing: Add quartz sand, quartz powder and olivine into the mortar mixer according to the proportion and mix for 5 min to 8 min; Step (3): Add water and stir: Add clean water to the dry mixture and continue stirring for 15 min to 25 min to obtain a plastic adhesive; Step (4): Material trapping construction: After discharge, trap the material for 24 hours, add ≤2% water according to the dryness and wetness of the material, and it can be used for bonding construction.

[0012] Preferably, both steps (2) and (3) are performed using a mortar mixer.

[0013] Preferably, after the adhesive is applied, it is first allowed to air dry naturally for 24 hours, and then placed in a drying kiln and dried at 150℃~180℃ for 8 hours~20 hours.

[0014] Preferably, the amount of water added after the material is trapped in step (4) is 0% to 2%.

[0015] Preferably, the prepared adhesive is used for filling and bonding between the ladle drain brick and the steel shell. After drying, it has low porosity, high strength, and is impact-resistant and does not pulverize.

[0016] Compared with existing technologies, the adhesive material for embedding steel ladle drain outlet bricks and steel shells described in this invention has the following advantages: This invention, through the synergistic formulation of quartz sand, olivine, bentonite, thermosetting resin powder, and modified solid hydrogen powder, comprehensively improves the performance of the adhesive material between the drain outlet brick and the steel shell in terms of construction performance, curing strength, bonding and sealing, structural protection, safety and stability, and process adaptability. The adhesive material, after adding water, possesses suitable viscosity and good plasticity, with a uniform texture, non-stickiness to tools, and easy application and filling. It can quickly and completely fill the gap between the drain outlet brick and the steel shell, eliminating voids and omissions, significantly improving installation efficiency and ensuring precise positioning and installation of the drain outlet brick without displacement or jamming. Simultaneously, after drying and curing, the adhesive layer has a dense structure and low porosity, possessing high mechanical strength and impact resistance. It can withstand the external force and impact during the installation of the drain outlet brick, without loosening, pulverizing, or shedding material. This fundamentally avoids the problem of loosening and shifting of the drain outlet brick due to adhesive material breakage and failure, ensuring long-term use. It maintains structural integrity; and the adhesive has strong bonding force with the refractory matrix of the drain outlet brick and the metal interface of the steel shell. The bonding interface is free of cracks, gaps, and voids. After curing, the overall sealing performance is excellent, which can completely block the steel penetration channel and effectively prevent steel from leaking from the gap between the drain outlet brick and the steel shell, and the mating surface between the drain outlet and the slide plate, avoiding safety accidents such as burning of the mechanism and steel leakage. The adhesive has both strength and moderate toughness, which can buffer and wrap and reinforce the drain outlet brick, reduce the risk of brick breakage and corner chipping during installation impact and use, and improve the overall structural stability. It supports multiple cycles of use of the slide plate and drain outlet, significantly reducing spare parts wear and production costs. In addition, high-purity quartz sand and olivine are used as refractory aggregates, which are resistant to high temperature, corrosion and have good thermal stability. They do not soften, shrink or crack in the high temperature service environment of the steel ladle, maintaining the integrity of the adhesive layer and reliable sealing, meeting the long-term safe use requirements under the continuous casting conditions of steelmaking.

[0017] The raw materials used in this invention are widely available and have stable proportions. Preparation can be completed simply by dry mixing, adding water and stirring, curing, and drying. The process is mild and easy to control, requiring no special equipment and suitable for large-scale production. After application, the material can be naturally air-dried and then dried at low temperature. The curing process is flexible and adaptable to different construction conditions and production rhythms at steel plants. The binder contains no toxic or harmful components, and after drying, there is no volatilization or powdering pollution, ensuring stable and safe use. Through stable bonding and sealing protection, the reliable operation of the ladle outlet mechanism is guaranteed, significantly reducing safety hazards in steelmaking production and improving the continuity and stability of continuous casting operations. Detailed Implementation

[0018] Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this invention pertains.

[0019] The present invention will now be described in detail.

[0020] Example 1 An adhesive for embedding steel ladle drain outlet bricks to steel shells, comprising the following components by weight percentage: 28% 1-0.5mm quartz sand; 22% 0.5-0mm quartz sand; 22% 320-mesh quartz powder; 13% 0.5-0mm olivine; 15% 320-mesh olivine; plus: 3% 320-mesh bentonite, 0.5% 200-mesh thermosetting resin powder, 5% 200-mesh modified solid hydrogen powder, and 11% clean water. Among them, quartz sand and quartz powder of different particle sizes form a multi-graded skeleton structure, which effectively improves the density and high-temperature erosion resistance of the adhesive after molding; the olivine component has excellent thermal shock resistance and can offset the thermal expansion and contraction stress under high-temperature operation of steel ladle, thus preventing cracking of the adhesive layer; bentonite, as a thickening and water-retaining agent, improves the uniformity of material mixing and workability; thermosetting resin powder can improve the overall strength and wear resistance of the adhesive layer after drying and curing; modified solid dihydrogen powder is a functional modifier that optimizes the sintering performance and interfacial bonding effect of the material; and clean water is used as a dispersing solvent to ensure that all raw materials are fully mixed and reacted.

[0021] The method for preparing the adhesive for embedding the drain outlet brick of the steel ladle to the steel shell includes the following steps: Step (1) Raw material inspection: Strictly follow the industry's technical standards for refractory material raw materials, and conduct item-by-item inspections on all solid raw materials used in this production, including 1-0.5mm quartz sand, 0.5-0mm quartz sand, 320-mesh quartz powder, 0.5-0mm olivine, 320-mesh olivine, 320-mesh bentonite, and 200-mesh thermosetting resin powder. Focus on testing core indicators such as particle size purity, impurity content, refractoriness, and moisture content of the raw materials. Remove raw materials that are damp, clumped, have excessive particle size, or do not meet performance standards to ensure that all raw materials meet production standards and guarantee the quality of the finished adhesive from the source.

[0022] Step (2) Dry material mixing: Accurately weigh all qualified solid raw materials and strictly follow the formula weight ratio for feeding. Add all dry materials, including quartz sand, quartz powder, olivine, bentonite, thermosetting resin powder, and modified solid hydrogen powder, into a dedicated mortar mixer in sequence. After feeding, seal the mixer chamber and continue mixing at a uniform speed for 7 minutes. Thorough dry mixing breaks up agglomerated particles, achieving uniform mixing of solid raw materials with different particle sizes and functions, ensuring consistent material component distribution, and laying the foundation for subsequent water addition and molding.

[0023] Step (3) Wet material plasticizing and mixing: After the dry material is mixed and the materials are evenly mixed, slowly and evenly add the clean water in the formula ratio into the mixer. Keep the mixer running continuously during the water addition process to avoid local water accumulation and clumping. After the water addition is completed, continue to stir continuously for 18 minutes to allow the water to fully soak and react with various solid raw materials, activate the water retention and shaping properties of bentonite and the activity of resin and modifiers, and finally produce a plastic adhesive with uniform texture, good plasticity, no dry powder and no lumps.

[0024] Step (4) Material conditioning and construction pretreatment: The mixed plastic adhesive is completely discharged from the mixer and placed in a clean, dry, and ventilated sealed silo for conditioning treatment. The conditioning time is strictly controlled to 24 hours. The conditioning process allows the internal moisture of the material to fully penetrate and balance, and the components to fully pre-react, eliminating the internal stress of the material and greatly improving the bonding effect and curing strength of the later construction. After the conditioning is completed, according to the actual dry and wet state of the material, the ambient temperature and construction requirements, add an appropriate amount of clean water and stir slightly to adjust the consistency. After adjusting to a state suitable for application and inlay construction, it can be used for bonding and inlaying operations between the steel ladle drain outlet brick and the steel shell.

[0025] Step (5) Drying, baking and storage: After the construction is completed, the bonded components are first placed in a normal temperature, dry, ventilated and dust-free environment to air dry naturally for 24 hours, so that the free moisture on the surface and inside of the adhesive layer can be initially evaporated, avoiding rapid high temperature drying that may cause the adhesive layer to blister, crack and fall off. After natural drying, the components are smoothly sent into the drying kiln, and the drying process parameters are set to a temperature of 155℃ and constant temperature drying for 15 hours. Gradient constant temperature drying is used to achieve complete curing of the adhesive material, giving full play to the bonding performance and refractory performance of each component. After drying, wait for the kiln to cool down naturally to the normal temperature, take out the finished components, and after passing the appearance and bonding strength tests, pack and store them in the warehouse.

[0026] Example 2 An adhesive for embedding steel ladle drain outlet bricks to steel shells, comprising the following components by weight percentage: 25% 1-0.5mm quartz sand; 25% 0.5-0mm quartz sand; 23% 320-mesh quartz powder; 11% 0.5-0mm olivine; 16% 320-mesh olivine; plus: 4% 320-mesh bentonite, 0.6% 200-mesh thermosetting resin powder, 6% 200-mesh modified solid hydrogen powder, and 11% clean water. This embodiment finely adjusts the ratio of coarse to fine quartz sand, increasing the proportion of fine-particle quartz sand, optimizing the material filling density, and reducing the porosity of the adhesive layer; it also appropriately adjusts the ratio of coarse to fine olivine powder to enhance the high-temperature bonding performance of the material; and simultaneously increases the amount of bentonite, thermosetting resin powder, and modified solid hydrogen powder to further improve the workability, curing bond strength, and anti-aging properties of the adhesive, adapting it to higher-temperature drying and curing processes, and improving the overall durability of the finished product.

[0027] The method for preparing the adhesive for embedding the drain outlet brick of the steel ladle to the steel shell includes the following steps: Step (1) Raw material procurement and inspection: All raw materials are procured in strict accordance with the technical standards for refractory material production. Raw material suppliers are selected in a standardized manner to ensure a stable source of raw materials. Before the raw materials are put into storage, all indicators are inspected in accordance with the industry-specific technical standards. The key points are to check the particle size, chemical composition, refractory performance, dryness and impurity content of the raw materials. All raw materials can be put into storage for use only after all indicators are qualified. Unqualified raw materials are returned to prevent inferior raw materials from being put into production.

[0028] Step (2) Precise ingredient proportioning: Based on the weight percentage of the exclusive formula in this embodiment, all qualified solid raw materials and additives are weighed one by one using a precise weighing device. The amount of each component is precisely controlled, the ratio error is strictly controlled, and the material ratio of each batch is accurately and uniformly matched to ensure the consistency of the finished product performance.

[0029] Step (3) Homogeneous mixing of dry materials: All the dry materials that have been precisely proportioned are put into the mortar mixer, the mixing equipment is sealed, and the mixture is continuously mixed at a uniform speed for 7 minutes. Through the standardized dry mixing process, the coarse and fine aggregates, powders and functional additives are fully mixed, eliminating the phenomenon of material segregation, ensuring the overall uniformity of the mixed dry materials, and providing a good foundation for subsequent wet mixing molding.

[0030] Step (4) Deep mixing of wet materials: Slowly add the specified amount of clean water to the evenly mixed dry materials, and keep the mixer running stably throughout the process to prevent water from accumulating and materials from clumping. After adding water, continue mixing for 19 minutes. Compared with Example 1, the wet mixing time is appropriately extended to allow the functional additives to fully integrate and react with the aggregates and water, improve the plasticity and adhesive activity of the materials, and prepare a fine, uniform plastic adhesive with excellent bonding performance.

[0031] Step (5) Material conditioning and construction adjustment: After the material is mixed, it is discharged and placed in a closed and dry environment for 24 hours to allow the internal moisture of the material to fully and homogeneously penetrate, and each component to complete the pre-combination reaction and optimize the construction performance of the material. After the material conditioning is completed, clean water is added in small amounts and multiple times to adjust the consistency of the material according to the on-site construction environment and the dryness and wetness of the material until the material is suitable for the inlay bonding construction requirements of the steel ladle drain brick and the steel shell. Then the construction operation can be carried out.

[0032] Step (6) Drying and Warehousing: After construction, the components are naturally dried in a normal temperature and ventilation environment for 24 hours to slowly evaporate the free moisture on the surface and inside, preventing defects caused by high-temperature drying. Then, they are sent to a drying kiln and a high-temperature enhanced curing process is adopted. The parameters are set as follows: temperature 190℃ and constant temperature drying for 16 hours. Through higher temperature and longer heat preservation time, the resin additives and modified additives are fully cured and cross-linked, which greatly improves the hardness, bonding strength and high temperature resistance of the adhesive layer. After drying and cooling, the finished product is tested and qualified, and then it can be packaged and stored.

[0033] Example 3 An adhesive for embedding steel ladle drain outlet bricks to steel shells, comprising the following components by weight percentage: 29% 1-0.5mm quartz sand; 21% 0.5-0mm quartz sand; 24% 320 mesh quartz powder; 10% 0.5-0mm olivine; 15% 320 mesh olivine; plus: 5% 320 mesh bentonite, 0.7% 200 mesh thermosetting resin powder, 7% 200 mesh modified solid hydrogen powder, and 12% clean water. This embodiment increases the proportion of coarse-grained quartz sand and quartz powder to construct a more stable high-strength skeleton structure, significantly improving the compressive and erosion resistance of the adhesive layer; it finely adjusts the olivine particle ratio to meet the thermal stress buffering requirements of the high-strength skeleton; it significantly increases the amount of bentonite, resin powder, and modified hydrogen powder, while appropriately increasing the water content, significantly improving the workability and plasticity of the material, extending the material's workability time, adapting to complex working conditions, and further improving the bond strength, high-temperature resistance, and crack resistance after curing.

[0034] The method for preparing the adhesive for embedding the drain outlet brick of the steel ladle to the steel shell includes the following steps: Step (1) Raw material procurement and inspection: Strictly follow the production technology standards of the refractory materials industry to procure all raw materials. The specifications, grades and performance of the raw materials must meet the design requirements. After all raw materials arrive, they are tested item by item according to the standardized inspection process to verify key indicators such as particle size, purity, refractoriness, moisture content and chemical composition. Only raw materials that meet all the indicators can be put into batching and production to ensure product stability from the source.

[0035] Step (2) Precise proportioning and feeding: Based on the exclusive weight ratio of this embodiment, use high-precision weighing equipment to accurately weigh various aggregates, powders and functional additives, strictly control the proportioning error of each component, ensure the accuracy of material components, and ensure that the various performances of the adhesive material meet the standards.

[0036] Step (3) Dry material mixing: Put all the weighed qualified dry materials into the mortar mixer, close the equipment and continue mixing for 7 minutes to achieve uniform mixing of coarse and fine aggregates, inorganic powder and organic additives, and ensure that the dry material system is uniform, without agglomeration and without stratification.

[0037] Step (4) Long-term mixing of wet materials: Slowly add 12% clean water to the uniform dry materials and stir at a constant speed to avoid clumping of materials. After adding water, continue stirring for 21 minutes. Compared with the previous two examples, the wet mixing time is further extended to allow the high content of functional additives to be fully dispersed and activated, so that the water and materials are completely soaked and integrated, and a homogeneous plastic adhesive with excellent plasticity and stronger adhesive activity is prepared.

[0038] Step (5) Material conditioning and construction adaptation: After the mixed material is discharged, it is sealed and conditioned for 24 hours. By fully conditioning the material, the internal stress of the material is released, the moisture distribution is balanced, and the smoothness of the material during construction and the strength of the later curing are improved. After the material is conditioned, according to the ambient temperature and the dryness and wetness of the material, an appropriate amount of clean water is added to adjust the consistency. After adjusting to the best construction state, it is used for the bonding and inlaying construction of the steel ladle drain brick and the steel shell.

[0039] Step (6) Drying and Storage: After construction, the components are air-dried at room temperature for 24 hours to allow initial evaporation of free moisture. They are then placed in a drying kiln using a low-temperature, long-term drying and curing process. The parameters are set at 160℃ for 22 hours of constant temperature drying. This prolonged constant-temperature curing allows the internal additives to fully react, the aggregates to bind tightly, eliminates internal pores, and improves the density, stability, and service life of the adhesive layer. After the kiln cools down, the finished product is removed, inspected, and packaged for storage.

[0040] Example 4 An adhesive for embedding steel ladle drain outlet bricks and steel shells comprises, by weight percentage: 29% 1-0.5mm quartz sand; 21% 0.5-0mm quartz sand; 24% 320-mesh quartz powder; 10% 0.5-0mm olivine; 15% 320-mesh olivine; plus: 5% 320-mesh bentonite; 0.7% 200-mesh thermosetting resin powder; 7% 200-mesh modified solid hydrogen powder; and 12% clean water. This formulation balances skeleton strength, workability, and high-temperature stability, exhibiting excellent overall performance.

[0041] The method for preparing the adhesive for embedding the drain outlet brick of the steel ladle to the steel shell includes the following steps: Step (1) Raw material procurement and inspection: All production raw materials are procured in strict accordance with industry technical standards to ensure uniform specifications and stable quality. After the raw materials arrive, a full range of quality inspections are carried out in strict accordance with national standards, with a focus on testing the particle size accuracy, impurity content, fire resistance, dryness and chemical stability of the raw materials. Only after all raw materials have passed inspection can they be used in the batching process to prevent unqualified raw materials from affecting the quality of the finished product.

[0042] Step (2) Precise ingredient proportioning: Strictly follow the predetermined weight percentage formula in this embodiment, use high-precision weighing equipment to weigh each type of raw material one by one, accurately control the amount of each component, minimize the proportioning error, and ensure that the performance of each batch of materials is consistent and the quality is stable.

[0043] Step (3) Dry material intensified mixing: Put all the prepared dry material raw materials into the mortar mixer, close the equipment and continue mixing for 8 minutes. Compared with the previous embodiment, the dry mixing time is extended by 1 minute to completely break up the fine powder agglomerates and achieve all-round uniform mixing of coarse and fine aggregates, inorganic refractory powders and organic functional additives, further improving the homogeneity of the dry material system.

[0044] Step (4) Deep plasticizing and mixing of wet materials: Slowly add the specified amount of clean water to the evenly mixed dry materials, keeping the mixer running smoothly to ensure that the water is evenly dispersed. After adding water, continue to stir for 23 minutes to provide sufficient time for material wetting, additive activation, and component reaction, so that the plasticity and adhesion of the material reach the best state, and produce a plastic adhesive with fine texture, uniformity, no defects, and excellent workability.

[0045] Step (5) Material conditioning and construction adjustment: After the material is mixed, it is discharged and conditioned for 24 hours in a clean, sealed, and normal temperature environment to fully optimize the internal structure of the material, balance moisture and internal stress, and improve the bonding reliability. After the material conditioning is completed, according to the on-site construction conditions and the actual dryness and wetness of the material, add a small amount of clean water multiple times to adjust the consistency of the material and adapt to the inlay bonding construction requirements of the steel ladle drain outlet brick and the steel shell.

[0046] Step (6) Drying and Storage: After construction, the components are placed in a normal temperature and ventilated environment to air dry naturally for 24 hours to slowly remove surface and internal free moisture and avoid drying defects. Then, they are sent into a drying kiln and a medium-temperature precision curing process is adopted. The parameters are set as 178℃ temperature and constant temperature drying for 15 hours to accurately match the curing characteristics of the materials in this formula. This ensures that the functional additives are fully cross-linked and cured, and avoids the loss of material performance caused by high temperature and long-term drying. This achieves high strength and high density curing of the adhesive layer. After the kiln body cools to room temperature, the finished product is taken out. After passing the appearance, adhesive strength and density tests, it is packaged and stored in the warehouse.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adhesive for embedding steel ladle drain outlet bricks and steel shells, characterized in that: The adhesive, by weight percentage, consists of the following components: 20%–30% 1-0.5mm quartz sand; 10%–30% 0.5-0mm quartz sand; 20%–30% 320-mesh quartz powder; 10%–20% 0.5-0mm olivine; 10%–20% 320-mesh olivine; and additional components: 1%–5% 320-mesh bentonite, 0.1%–2% 200-mesh thermosetting resin powder, 5%–9% 200-mesh modified solid hydrogen powder, and 8%–15% clean water.

2. The adhesive for embedding the drain outlet brick of the steel ladle and the steel shell according to claim 1, characterized in that: The quartz sand contains ≥98.0% SiO2 by mass, ≤0.9% Fe2O3 by mass, and the sum of Na2O and K2O by mass is ≤0.06%.

3. The adhesive for embedding the drain outlet brick of the steel ladle and the steel shell according to claim 1, characterized in that: The olivine contains ≥38% SiO2 by mass, ≤12% Fe2O3 by mass, and ≥45% MgO by mass.

4. The adhesive for embedding the drain outlet brick of the steel ladle and the steel shell according to claim 1, characterized in that: The bentonite contains SiO2 with a mass percentage of ≥45.0%, Al2O3 with a mass percentage of 26%–36%, Na2O and K2O with a combined mass percentage of ≤1%, and Fe2O3 with a mass percentage of ≤0.8%.

5. The adhesive for embedding the drain outlet brick of the steel ladle and the steel shell according to claim 1, characterized in that: The thermosetting resin powder has a moisture content of ≤2% and a polymerization rate of 45s to 85s at 150℃.

6. A method for preparing the adhesive for embedding the steel ladle drain outlet brick and the steel shell according to any one of claims 1-5, characterized in that: Includes the following steps: Step (1): Raw material procurement and inspection: Procurement and inspection of raw materials in accordance with technical standards, and only those that pass the inspection can be put into use; Step (2): Dry mixing: Add quartz sand, quartz powder and olivine into the mortar mixer according to the proportion and mix for 5 min to 8 min; Step (3): Add water and stir: Add clean water to the dry mixture and continue stirring for 15 min to 25 min to obtain a plastic adhesive; Step (4): Material trapping construction: After discharge, trap the material for 24 hours, add ≤2% water according to the dryness and wetness of the material, and it can be used for bonding construction.

7. The method for preparing the adhesive for embedding the steel ladle drain outlet brick and the steel shell according to claim 6, characterized in that: Both steps (2) and (3) are completed using a mortar mixer.

8. The method for preparing the adhesive for embedding the steel ladle drain outlet brick and the steel shell according to claim 6, characterized in that: After the adhesive is applied, it should be allowed to air dry naturally for 24 hours, and then placed in a drying kiln and dried at 150℃~180℃ for 8 hours~20 hours.

9. The method for preparing the adhesive for embedding the steel ladle drain outlet brick and the steel shell according to claim 6, characterized in that: In step (4), the amount of water added after the material is trapped is 0% to 2%.

10. The method for preparing the adhesive for embedding the steel ladle drain outlet brick and the steel shell according to claim 6, characterized in that: The prepared adhesive is used for filling and bonding between the steel ladle drain outlet brick and the steel shell. After drying, it has low porosity, high strength, and is impact resistant and does not pulverize.