CN112010658A - Slag adhesion preventing material for refining ladle opening and preparation method thereof - Google Patents
Slag adhesion preventing material for refining ladle opening and preparation method thereof Download PDFInfo
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- CN112010658A CN112010658A CN201910452490.1A CN201910452490A CN112010658A CN 112010658 A CN112010658 A CN 112010658A CN 201910452490 A CN201910452490 A CN 201910452490A CN 112010658 A CN112010658 A CN 112010658A
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/20—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in magnesium oxide, e.g. forsterite
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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Abstract
The invention discloses a refined steel ladle opening slag-sticking-preventing material and a preparation method thereof, wherein the material comprises the following raw materials in percentage by mass: 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder, 1-3% of hardening accelerator and 10-14% of binding agent. The method comprises the following steps: the raw materials are mixed and stirred uniformly according to a proportion, 10-14% of a binding agent is added, and the mixture is stirred uniformly to form an unshaped slag-sticking-preventing coating which is coated on a ladle opening and a slag line. The material of the invention is MgO-SiO2the-C-type high-temperature-resistant, high-slag-infiltration-resistance, anhydrous and low-cost refining steel ladle opening slag-adhesion-prevention material can effectively prevent a ladle opening from being adhered with slag, the adhered steel slag is easy to clean, the service life of a steel ladle is prolonged, the repair of the steel ladle is reduced, and the production efficiency of a steel mill is improved. The raw materials adopted by the material of the invention can be used as wastesThe preparation method and the application of the material are simple and convenient.
Description
Technical Field
The invention relates to a slag adhesion preventing material for steelmaking and a preparation method thereof, in particular to a slag adhesion preventing material for a refining ladle opening and a preparation method thereof.
Background
Molten steel is contained in a ladle, molten metal and liquid metal are easy to splash and slag is easy to be bonded on a slag line and a ladle opening part in the refining process, the upper temperature is low, a molten mixture of the slag and the metal is easy to adhere on the ladle opening, slag is remained on the ladle opening during deslagging, and deslagging and cleanliness of the slag and the molten steel are also influenced due to severe slag bonding. The bonded slag-iron mixture and the ladle opening refractory material are firmly combined and infiltrate into the steel ladle opening refractory material, the manual cleaning is difficult, the slag cleaning efficiency is low, the ladle opening metal piece and the refractory material are easy to damage, and the steel-making production efficiency and the service life of the steel ladle are not facilitated. Therefore, technicians in steel plants develop various slag adhesion preventing materials which are coated on the ladle mouth part to reduce slag adhesion or facilitate slag removal. Currently, most prior art slag adhesion prevention coatings include:
1) in order to stick a ladle opening refractory material and strengthen sintering, the slag adhesion preventing coating in the prior art generally adopts a low-melting-point bonding agent or adds a low-melting-point raw material, so that slag is easy to melt and does not stick to the surface of the refractory material, but the high temperature resistance of the material is reduced, and the service life is short and the material is not durable.
2) In the prior art, the slag adhesion preventing coating is a water-based material, and water needs to be added for smearing or spraying during construction. This results in poor adhesion of the material, and is disadvantageous for the carbon-containing matrix refractory and for baking.
3) The prior art slag adhesion preventing coating is basically SiO2-Al2O3Or SiO2-Al2O3The CaO material system has a larger chemical composition difference with a steel ladle opening refractory MgO system, has large physical property difference such as expansion and the like, and is easy to peel off and drop in the application process. Secondly, the materials in the prior art are not excellent in resistance to infiltration of slag and metal liquid, and are easy to permeate to cause slag adhesion.
The Chinese invention patent with the patent number ZL200710049947.1 discloses an anti-slag unshaped refractory material which is sprayed on slag-sticking positions of an LF furnace cover, a steel ladle, a steel slag tank and the like, avoids the damage of slag removal to equipment, reduces the production cost and improves the production efficiency. However, the bonding agent of the patent is a low-melting substance and belongs to SiO2-Al2O3The material is not good in cohesiveness, unfavorable for carbon-containing matrix refractory and unfavorable for baking.
The Chinese patent with the patent number ZL201611146168.9 discloses a slagging agent capable of effectively removing ladle sticky slag and a method for removing the ladle sticky slag by utilizing the slagging agent. The slag melting agent comprises the following components in percentage by weight: SiO 22：24～36％、CaO：32～44％、Al2O3≤4.0、MgO≤3.0、F：3～9％、Na2O: 6-12% of CaO/SiO in a weight ratio, and the balance of unavoidable impurities20.8 to 1.8. The patent is a slagging agent technology, can melt high-melting-point slag, and can also cause certain melting loss to a working layer refractory material. The patent does not belong to the field of refractory materials, does not aim at slag adhesion of a ladle opening, and solves the problems that slag adhesion occurs on the wall and the bottom of a steel ladle, the steel ladle is seriously overweight and the like.
The Chinese invention patent application with the application number of CN 201711287175.5 discloses a ladle slag modifier, which comprises the following components in percentage by weight: CaO 50-80%, SiO2 5-15％、MgO 5-20％、Al2O35-15%, S is less than or equal to 0.08%, and P is less than or equal to 0.025%. The steel ladle slag modifier is a slag melting agent, and is used for modifying the silicon steel slag originally containing a high-melting-point phase into low-melting-point slag so as to reduce the slagging temperature and the adhesion performance of the steel ladle, solve the problem of weight increment of the slag adhered to the steel ladle during the production of high-silicon high-aluminum steel and ensure the smooth production. The technology does not belong to the field of refractory materials, does not aim at slag adhesion of a ladle opening, and solves the problems of slag adhesion of a ladle wall, severe overweight of the ladle and the like.
Disclosure of Invention
The invention aims to provide a refined steel ladle opening slag-sticking-preventing material and a preparation method thereof, wherein the material is MgO-SiO2the-C-type high-temperature-resistant, high-slag-infiltration-resistance, anhydrous and low-cost refining steel ladle opening slag-adhesion-prevention material can effectively prevent a ladle opening from being adhered with slag, the adhered steel slag is easy to clean, the service life of a steel ladle is prolonged, the repair of the steel ladle is reduced, and the production efficiency of a steel mill is improved.
The invention is realized by the following steps:
the refining ladle opening slag adhesion preventing material comprises the following raw materials in percentage by mass: 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder, 1-3% of hardening accelerator and 10-14% of binding agent.
The forsterite aggregate comprises MgO and Al2O3And CaO, wherein MgO is more than or equal to 47% by mass, and Al2O3≤1%，CaO≤1%。
The MgO in the fine magnesia powder is more than or equal to 92 percent, and the fineness of the fine magnesia powder is less than or equal to 0.088 mm.
The content of solid carbon in the carbon material fine powder is more than or equal to 82 percent, and the fineness of the carbon material fine powder is less than or equal to 0.074 mm.
The SiC in the silicon carbide fine powder is more than or equal to 80 percent, and the fineness of the silicon carbide fine powder is less than or equal to 0.045 mm.
The waste magnesia carbon brick aggregate comprises MgO and C, wherein the MgO is more than or equal to 72 percent, and the C is more than or equal to 5 percent by mass.
The binding agent is anhydrous resin, the viscosity of the anhydrous resin is 400-800 MPa.S, the solid content is more than or equal to 68%, and the residual carbon is more than or equal to 38%.
The hardening accelerator is light-burned magnesium powder or quicklime powder, wherein MgO in the light-burned magnesium powder is more than or equal to 87 percent; CaO in the quicklime powder is more than or equal to 85 percent, and the fineness of the quicklime powder is less than or equal to 0.088 mm.
The volume density of the slag adhesion preventing material is more than or equal to 2.4g/cm3The refractoriness is more than or equal to 1700 ℃, the compressive strength under the test condition of 110 ℃ multiplied by 24 hours is more than or equal to 10MPa, the compressive strength under the test condition of 1500 ℃ multiplied by 3 hours is more than or equal to 12MPa, and the linear change rate under the test condition of 1500 ℃ multiplied by 3 hours is-0.5- + 0.5%.
A preparation method of a refined steel ladle opening anti-sticking slag material comprises the steps of mixing 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder and 1-3% of hardening accelerator according to a proportion, uniformly stirring, adding 10-14% of a binding agent, uniformly stirring, and forming an amorphous anti-sticking slag coating which is coated on a ladle opening and a slag line part.
Compared with the prior art, the invention has the following beneficial effects:
1. the slag adhesion preventing material can be prepared from waste raw materials and low-cost raw materials, and the production cost is reduced.
2. According to the inventionThe slag adhesion preventing material is MgO-SiO2And the material of the-C system is complementary and reasonable, has good advantages and disadvantages, is closer to the material system of the working layer at the ladle opening and the slag line, has good performance matching, good high temperature resistance and good slag infiltration resistance, and is convenient to produce and construct.
3. The slag adhesion preventing material disclosed by the invention contains carbon, is not easy to be infiltrated by slag liquid, has the advantages of slag corrosion resistance, high temperature resistance, moderate strength, easiness in cleaning, good bonding performance with a refractory material at a ladle opening and the like, is not sticky and easy to clean, improves the slag adhesion condition of a refining ladle opening and a slag line, reduces the workload of ladle opening slag cleaning and the damage to a ladle, and reduces the labor intensity of workers.
4. The slag adhesion preventing material does not contain water, does not need to be added with water during construction, is more beneficial to baking and coating matrix refractory bricks, has better durability, is beneficial to prolonging the service life of a steel ladle, reducing the repair of the steel ladle and improving the production efficiency of a steel mill.
The slag adhesion preventing material is MgO-SiO2The C-type non-stick slag material for the steel ladle mouth has the advantages of high temperature resistance, good slag infiltration resistance, no water and low cost, has excellent comprehensive performance and application effect, can effectively prevent the ladle mouth from sticking slag, is easy to clean the stuck slag, is beneficial to prolonging the service life of the steel ladle, reducing the repair of the steel ladle and improving the production efficiency of a steel mill; meanwhile, the raw materials adopted by the material of the invention have low cost and can be used as wastes, and the preparation method and the application of the material are simple and convenient.
Detailed Description
The refining ladle opening slag adhesion preventing material comprises the following raw materials in percentage by mass: 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder, 1-3% of hardening accelerator and 10-14% of binding agent.
The forsterite aggregate mainly comprises MgO and Al2O3And CaO, wherein MgO is more than or equal to 47% by mass, and Al2O3Less than or equal to 1 percent and CaO less than or equal to 1 percent. The invention adopts forsterite (2 MgO. SiO)2) Is used as main material and has melting point of 1890 deg.C, and is prepared from MgO and SiO2The refractory material is a natural mineral raw material with main components, has low price, good chemical stability, corrosion resistance to metal melt and slag, good compatibility with magnesium and aluminum refractory materials, and is suitable for specific requirements of a steelmaking process.
The MgO in the fine magnesia powder is more than or equal to 92 percent, and the fineness of the fine magnesia powder is less than or equal to 0.088 mm. The magnesia powder is added into the matrix, so that the erosion resistance of the matrix is enhanced. Because forsterite can produce magnesium metasilicate MgO.SiO with lower melting point at high temperature2Partially free SiO2And comprises Fe3O4The low-melting substance is not good for the coating, and can bring rich MgO into the coating through the magnesite powder, and the MgO is SiO in the forsterite at high temperature in the application process2And SiO2Can be converted into forsterite 2MgO2And Magnesium Ferrite (MF) having a higher melting point. The reaction formula is as follows:
SiO2+MgO----2MgO.SiO2
MgO.SiO2+MgO----2MgO.SiO2
2Fe3O4+MgO+1/2O2----3（MgO.Fe2O3）
therefore, although a large amount of low-cost raw materials are used in the anti-sticking slag material, the substrate is rich in MgO, so that the negative influence caused by the main raw material of forsterite is eliminated, and the anti-sticking slag material can still have better high-temperature resistance.
The content of solid carbon in the carbon material fine powder is more than or equal to 82 percent, and the fineness of the carbon material fine powder is less than or equal to 0.074 mm. The carbon material has good infiltration resistance and thermal shock resistance to liquid slag and molten steel. Preferably, the carbon material fine powder can adopt earthy graphite or waste electrode graphite powder.
The SiC in the silicon carbide fine powder is more than or equal to 80 percent, and the fineness of the silicon carbide fine powder is less than or equal to 0.045 mm. The silicon carbide is a material with high melting point, high hardness and excellent slag corrosion resistance, and can select SiC fine powder with lower product grade. On one hand, the silicon carbide fine powder enables the substrate to be densified and the slag corrosion resistance to be improved in the slag adhesion preventing material; on the other hand, the carbon material in the material is protected by the oxidation resistance. The reaction formula is as follows:
SiC+O2----SiO2+CO2
SiO produced by the reaction2Covering the surface of the paint and blocking the air holes, preventing oxygen in the air from permeating into the material, thereby protecting C in the paint from being oxidized.
The main components of the waste magnesia carbon brick aggregate are MgO and C, wherein the MgO is more than or equal to 72 percent and the C is more than or equal to 5 percent by mass percent. The used waste magnesia carbon bricks are good secondary refractory resources after being crushed, hydrated and dried, and the addition of magnesia and graphite in the slag adhesion preventing material can be reduced by adding the waste magnesia carbon bricks.
Preferably, the binding agent can adopt anhydrous resin, the viscosity of the anhydrous resin is 400-800 MPa.S, the solid content is more than or equal to 68%, the residual carbon is more than or equal to 38%, and the binding force is strong. The refined steel ladle opening slag-adhesion-preventing material is adhered to the steel ladle opening and the slag line part through a bonding agent, and the anhydrous resin adopted by the invention has good affinity to materials such as graphite and the like and very good bonding property to magnesia carbon bricks, so the slag-adhesion-preventing material has excellent uniformity and bonding property, is tightly bonded with a working layer refractory material after being coated on the use part and baked, and has moderate strength at high temperature. Different from the prior art which adopts low-melting-point bonding agents such as high-alumina cement, phosphate and the like, the resin can not reduce the high-temperature resistance of the material.
Because the binder is added, the solidification of the material is slow, and the hardening accelerator can be added to quickly harden the anti-sticking slag after being coated, thereby accelerating the turnover of the steel ladle. The hardening accelerator can adopt light-burned magnesium powder or quicklime powder, wherein MgO in the light-burned magnesium powder is more than or equal to 87%; CaO in the quicklime powder is more than or equal to 85 percent, and the fineness of the quicklime powder is less than or equal to 0.088 mm; the hardening accelerator can accelerate the setting and curing, quickly form strength and reduce the construction time.
The volume density of the slag adhesion preventing material is more than or equal to 2.4g/cm3The refractoriness is more than or equal to 1700 ℃, the compressive strength under the test condition of 110 ℃ multiplied by 24 hours is more than or equal to 10MPa, the compressive strength under the test condition of 1500 ℃ multiplied by 3 hours is more than or equal to 12MPa, and the linear change rate under the test condition of 1500 ℃ multiplied by 3 hours is-0.5- + 0.5%.
A preparation method of a refined steel ladle opening anti-sticking slag material comprises the steps of mixing 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder and 1-3% of hardening accelerator according to a proportion, uniformly stirring, adding 10-14% of a binding agent, uniformly stirring, and forming a low-cost amorphous anti-sticking slag coating which is coated on a ladle opening and a slag-feeding line. The raw materials such as forsterite aggregate, waste magnesia carbon brick bone, carbon material fine powder and the like can adopt waste materials, and the cost is low.
Example 1:
taking 15kg of waste magnesia carbon brick aggregate, 5kg of forsterite fine powder, 40kg of forsterite aggregate, 15kg of magnesia fine powder, 7kg of carbon material fine powder, 6kg of silicon carbide fine powder and 1kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 11kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking-preventing coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this embodiment, the carbon material fine powder is waste electrode graphite powder, and the hardening accelerator is quicklime powder.
Example 2:
taking 25kg of waste magnesia carbon brick aggregate, 10kg of forsterite fine powder, 25kg of forsterite aggregate, 20kg of magnesia fine powder, 3kg of carbon material fine powder, 2kg of silicon carbide fine powder and 2kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 13kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking prevention coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this example, the carbon material fine powder was used as the soil-like graphite powder, and the hardening accelerator was used as the light-burned magnesium powder.
Example 3:
taking 20kg of waste magnesia carbon brick aggregate, 6kg of forsterite fine powder, 30kg of forsterite aggregate, 22kg of magnesia fine powder, 4kg of carbon material fine powder, 3kg of silicon carbide fine powder and 3kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 12kg of anhydrous resin into the obtained mixture, and continuously stirring for 3-5 min. The prepared unshaped slag-sticking-preventing coating is smeared at the mouth of a steel ladle, and the thickness of the coating is more than or equal to 7 mm. In this example, the carbon material fine powder was used as the soil-like graphite powder, and the hardening accelerator was used as the light-burned magnesium powder.
Example 4:
taking 18kg of waste magnesia carbon brick aggregate, 7kg of forsterite fine powder, 35kg of forsterite aggregate, 18kg of magnesia fine powder, 5kg of carbon material fine powder, 4kg of silicon carbide fine powder and 3kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 10kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking prevention coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this embodiment, the carbon material fine powder is waste electrode graphite powder, and the hardening accelerator is quicklime powder.
Example 5:
taking 16kg of waste magnesia carbon brick aggregate, 8kg of forsterite fine powder, 33kg of forsterite aggregate, 17kg of magnesia fine powder, 6kg of carbon material fine powder, 5kg of silicon carbide fine powder and 1kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 14kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking-preventing coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this embodiment, the carbon material fine powder is waste electrode graphite powder, and the hardening accelerator is light-burned magnesium powder.
Example 6:
taking 17kg of waste magnesia carbon brick aggregate, 6kg of forsterite fine powder, 37kg of forsterite aggregate, 19kg of magnesia fine powder, 5kg of carbon material fine powder, 3.5kg of silicon carbide fine powder and 1.5kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 11kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking prevention coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this embodiment, the carbon material fine powder is earthy graphite powder, and the hardening accelerator is quicklime powder.
Example 7:
taking 23kg of waste magnesia carbon brick aggregate, 9kg of forsterite fine powder, 28kg of forsterite aggregate, 16kg of magnesia fine powder, 4kg of carbon material fine powder, 3kg of silicon carbide fine powder and 3kg of hardening accelerator, uniformly stirring in a stirring device for 10min, adding 14kg of anhydrous resin into the obtained mixture, continuously stirring for 3-5 min, and smearing the prepared amorphous slag-sticking-preventing coating on the ladle opening part, wherein the coating thickness is more than or equal to 7 mm. In this embodiment, the carbon material fine powder is waste electrode graphite powder, and the hardening accelerator is quicklime powder.
The physical property indexes of the slag adhesion preventing coating can reach the following test conditions:
Claims (10)
1. the anti-sticking slag material for the refining ladle opening is characterized in that: the composite material comprises the following raw materials in percentage by mass: 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder, 1-3% of hardening accelerator and 10-14% of binding agent.
2. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the forsterite aggregate comprises MgO and Al2O3And CaO, wherein MgO is more than or equal to 47% by mass, and Al2O3≤1%，CaO≤1%。
3. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the MgO in the fine magnesia powder is more than or equal to 92 percent, and the fineness of the fine magnesia powder is less than or equal to 0.088 mm.
4. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the content of solid carbon in the carbon material fine powder is more than or equal to 82 percent, and the fineness of the carbon material fine powder is less than or equal to 0.074 mm.
5. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the SiC in the silicon carbide fine powder is more than or equal to 80 percent, and the fineness of the silicon carbide fine powder is less than or equal to 0.045 mm.
6. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the waste magnesia carbon brick aggregate comprises MgO and C, wherein the MgO is more than or equal to 72 percent, and the C is more than or equal to 5 percent by mass.
7. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the binding agent is anhydrous resin, the viscosity of the anhydrous resin is 400-800 MPa.S, the solid content is more than or equal to 68%, and the residual carbon is more than or equal to 38%.
8. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the hardening accelerator is light-burned magnesium powder or quicklime powder, wherein MgO in the light-burned magnesium powder is more than or equal to 87 percent; CaO in the quicklime powder is more than or equal to 85 percent, and the fineness of the quicklime powder is less than or equal to 0.088 mm.
9. The refining ladle opening slag adhesion preventing material as set forth in claim 1, which is characterized in that: the volume density of the slag adhesion preventing material is more than or equal to 2.4g/cm3The refractoriness is more than or equal to 1700 ℃, the compressive strength under the test condition of 110 ℃ multiplied by 24 hours is more than or equal to 10MPa, the compressive strength under the test condition of 1500 ℃ multiplied by 3 hours is more than or equal to 12MPa, and the linear change rate under the test condition of 1500 ℃ multiplied by 3 hours is-0.5- + 0.5%.
10. A method for preparing the refining ladle opening slag-sticking prevention material of claim 1, which is characterized by comprising the following steps: mixing 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder and 1-3% of hardening accelerator according to a proportion, uniformly stirring, adding 10-14% of binding agent, and uniformly stirring to form an amorphous anti-sticking slag coating, wherein the amorphous anti-sticking slag coating is coated on a ladle opening and a slag line.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293261A (en) * | 2021-04-13 | 2021-08-24 | 山西太钢不锈钢股份有限公司 | Method for efficiently cleaning accumulated scrap steel on top of RH vacuum tank |
| CN113816748A (en) * | 2021-09-03 | 2021-12-21 | 山东柯信新材料有限公司 | MgO-CaC for refining furnace2-C refractory material and preparation process thereof |
| CN114644481A (en) * | 2020-12-21 | 2022-06-21 | 中国京冶工程技术有限公司 | Heat-insulating anti-erosion slag-isolating coating material for slag pot and preparation method and application thereof |
| CN114645109A (en) * | 2022-02-25 | 2022-06-21 | 首钢京唐钢铁联合有限责任公司 | Method for solving slag shell in high-aluminum steel ladle |
| CN115093236A (en) * | 2022-05-24 | 2022-09-23 | 山西昊业新材料开发有限公司 | Forsterite VD/VOD ladle clearance area magnesia carbon brick and preparation method thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820784A (en) * | 1981-07-29 | 1983-02-07 | アイコ−株式会社 | Molten slag pot |
| KR20040012143A (en) * | 2002-08-01 | 2004-02-11 | 주식회사 포스렉 | Coating Agent for Slag Pot |
| CN101284736A (en) * | 2008-05-20 | 2008-10-15 | 攀枝花顺腾集团冶金材料有限公司 | Antisticking coating mixture for steel-smelting and preparation method threreof |
| CN101328070A (en) * | 2008-07-10 | 2008-12-24 | 武汉科技大学 | Forsterite-C-contained MgO-SiC-C fire-resistant material and preparation thereof |
| CN101348377A (en) * | 2008-08-21 | 2009-01-21 | 武汉科技大学 | Method for preparing fire-resistant material from synthetic MgO-SiC-C material |
| US20090227442A1 (en) * | 2006-02-20 | 2009-09-10 | Klischat Hans-Juergen | Fire-resistant ordinary ceramic batch, and fire-resistant product therefrom |
| JP2009298633A (en) * | 2008-06-12 | 2009-12-24 | Nippon Crucible Co Ltd | Casting monolithic refractory |
| CN103833385A (en) * | 2012-11-27 | 2014-06-04 | 宝山钢铁股份有限公司 | Slag bonding preventing coating for steel ladle working layer brick |
| CN103964870A (en) * | 2014-05-05 | 2014-08-06 | 武汉科技大学 | Magnesium-calcium coating for smelting equipment and application method of magnesium-calcium coating |
| CN105367092A (en) * | 2014-09-01 | 2016-03-02 | 上海柯瑞冶金炉料有限公司 | Spray coating capable of preventing slag adhesion |
| CN106316433A (en) * | 2016-08-31 | 2017-01-11 | 浙江科屹耐火材料有限公司 | Unshaped refractory and preparation method thereof |
| CN106365656A (en) * | 2016-08-31 | 2017-02-01 | 浙江科屹耐火材料有限公司 | Magnesium-carbon-zirconium composite refractory material and preparation method thereof |
| CN108821785A (en) * | 2018-06-27 | 2018-11-16 | 武汉钢铁有限公司 | A kind of coating against binding slags for hot-rolling heating furnace water beam heat preservation lining |
-
2019
- 2019-05-28 CN CN201910452490.1A patent/CN112010658B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820784A (en) * | 1981-07-29 | 1983-02-07 | アイコ−株式会社 | Molten slag pot |
| KR20040012143A (en) * | 2002-08-01 | 2004-02-11 | 주식회사 포스렉 | Coating Agent for Slag Pot |
| US20090227442A1 (en) * | 2006-02-20 | 2009-09-10 | Klischat Hans-Juergen | Fire-resistant ordinary ceramic batch, and fire-resistant product therefrom |
| CN101284736A (en) * | 2008-05-20 | 2008-10-15 | 攀枝花顺腾集团冶金材料有限公司 | Antisticking coating mixture for steel-smelting and preparation method threreof |
| JP2009298633A (en) * | 2008-06-12 | 2009-12-24 | Nippon Crucible Co Ltd | Casting monolithic refractory |
| CN101328070A (en) * | 2008-07-10 | 2008-12-24 | 武汉科技大学 | Forsterite-C-contained MgO-SiC-C fire-resistant material and preparation thereof |
| CN101348377A (en) * | 2008-08-21 | 2009-01-21 | 武汉科技大学 | Method for preparing fire-resistant material from synthetic MgO-SiC-C material |
| CN103833385A (en) * | 2012-11-27 | 2014-06-04 | 宝山钢铁股份有限公司 | Slag bonding preventing coating for steel ladle working layer brick |
| CN103964870A (en) * | 2014-05-05 | 2014-08-06 | 武汉科技大学 | Magnesium-calcium coating for smelting equipment and application method of magnesium-calcium coating |
| CN105367092A (en) * | 2014-09-01 | 2016-03-02 | 上海柯瑞冶金炉料有限公司 | Spray coating capable of preventing slag adhesion |
| CN106316433A (en) * | 2016-08-31 | 2017-01-11 | 浙江科屹耐火材料有限公司 | Unshaped refractory and preparation method thereof |
| CN106365656A (en) * | 2016-08-31 | 2017-02-01 | 浙江科屹耐火材料有限公司 | Magnesium-carbon-zirconium composite refractory material and preparation method thereof |
| CN108821785A (en) * | 2018-06-27 | 2018-11-16 | 武汉钢铁有限公司 | A kind of coating against binding slags for hot-rolling heating furnace water beam heat preservation lining |
Non-Patent Citations (3)
| Title |
|---|
| 刘正龙: "添加镁橄榄石颗粒对镁质中间包涂料性能的影响", 《耐火材料》 * |
| 潘波等: "低钙电熔镁钙砂与高钙烧结镁钙砂制备的MgO-CaO-C砖抗渣性对比", 《耐火材料》 * |
| 祝洪喜: "钢包用引流材料的流动性能与烧结性能", 《武汉科技大学学报（自然科学版）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644481A (en) * | 2020-12-21 | 2022-06-21 | 中国京冶工程技术有限公司 | Heat-insulating anti-erosion slag-isolating coating material for slag pot and preparation method and application thereof |
| CN113293261A (en) * | 2021-04-13 | 2021-08-24 | 山西太钢不锈钢股份有限公司 | Method for efficiently cleaning accumulated scrap steel on top of RH vacuum tank |
| CN113816748A (en) * | 2021-09-03 | 2021-12-21 | 山东柯信新材料有限公司 | MgO-CaC for refining furnace2-C refractory material and preparation process thereof |
| CN114645109A (en) * | 2022-02-25 | 2022-06-21 | 首钢京唐钢铁联合有限责任公司 | Method for solving slag shell in high-aluminum steel ladle |
| CN115093236A (en) * | 2022-05-24 | 2022-09-23 | 山西昊业新材料开发有限公司 | Forsterite VD/VOD ladle clearance area magnesia carbon brick and preparation method thereof |
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