CN109369147B - Method for compositely producing tundish impact plate by combining stopper rod turning material with waste slide plate - Google Patents
Method for compositely producing tundish impact plate by combining stopper rod turning material with waste slide plate Download PDFInfo
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Abstract
本发明公开了一种采用塞棒车削料结合废旧滑板复合生产中包冲击板的方法，通过在冲击板中引入废旧滑板砖、塞棒车削料，通过二次加工得到再生滑板颗粒料和塞棒颗粒料，以回收滑板中的板状刚玉颗粒为骨料，结合一定量塞棒车削料的富铝尖晶石，充分利用刚玉颗粒高温的抗冲刷能力和富铝尖晶石的抗熔渣侵蚀能力，两者有效结合，并采用热塑性酚醛树脂生产新型中包冲击板，提升了冲击板的高温使用过程中的抗冲刷和侵蚀能力，大幅度提升了冲击板安全性和使用寿命；从使用过程看本发明生产的中包冲击板抗冲刷、抗侵蚀和抗热冲击性能优于现有产品，本发明实现了废旧耐材的循环再高效利用，实现资源的可再生，节能环保，社会效益明显。The invention discloses a method for compositely producing a middle-packed impact plate by using stopper bar turning material and waste slide plate. By introducing waste slide plate bricks and stopper bar turning material into the impact plate, regenerated slide plate particles and stopper bars are obtained through secondary processing. Granular material, using the plate-shaped corundum particles in the recycled sliding plate as the aggregate, combined with a certain amount of aluminum-rich spinel from the turning material of the stopper, making full use of the high-temperature erosion resistance of the corundum particles and the anti-slag erosion of the aluminum-rich spinel The two are effectively combined, and thermoplastic phenolic resin is used to produce a new type of middle-package impact plate, which improves the erosion resistance and erosion resistance of the impact plate during high-temperature use, and greatly improves the safety and service life of the impact plate. It can be seen that the anti-scour, anti-erosion and anti-thermal shock properties of the middle-package impact plate produced by the present invention are better than those of the existing products. The present invention realizes the recycling and reuse of waste refractory materials with high efficiency, realizes renewable resources, energy saving and environmental protection, and obvious social benefits. .
Description
Technical Field
The invention belongs to the field of refractory materials, relates to a recycling technology of waste materials and a processing method thereof, and particularly relates to a method for producing a tundish impact plate by adopting a composite production of a recycled stopper turning material and a waste slide plate brick.
Background
The stopper rod turning material used in the invention is mainly waste turning material generated in the stopper rod turning process, the stopper rod is mainly used for controlling flow of a steel smelting continuous casting tundish, and the material is mainly corundum spinel.
The used waste slide plate is mainly used for recovering steel smelting ladle lining, the slide plate brick is mainly used as a part of a ladle molten steel flow control device, the closing of molten steel is controlled in the casting process, and the material is mainly plate-shaped corundum, graphite and the like.
The tundish impact plate is widely applied to a tundish bottom impact area of a steel smelting continuous casting tundish, and is subjected to molten steel scouring, thermal shock and slag erosion, and the service performance of the product directly influences the casting safety and continuous casting time of a continuous casting machine.
The tundish impact plate is widely applied to a molten steel impact area for a continuous casting tundish, is mainly prefabricated and formed by corundum and other materials for a long time, but is not high in use and utilization rate as a disposable product.
10-15% of turning materials are generated in the stopper rod turning process, and the turning materials are used as leftover materials after stopper rod processing and are all used as industrial wastes for treatment, so that resource waste and industrial solid waste pollution are caused.
The waste slide plate bricks are products after steel making ladles are used, are all processed by industrial garbage, cannot be effectively utilized and cause solid waste pollution to the environment.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for compositely producing a novel tundish impact plate by combining a stopper rod turning material with a waste slide plate.
The technical scheme adopted by the invention is as follows: a method for compositely producing a tundish impact plate by combining a stopper rod turning material with a waste slide plate specifically comprises the following steps:
step (1), grinding the recycled stopper turning material to eliminate false particles among aggregates, and screening the stopper turning material through a secondary screen to obtain stopper particles with the particle size of 0.1-1mm, wherein the particle size distribution is that the stopper particles with the particle size of 0.5-1mm account for 50-60% and the particle size distribution with the particle size of less than or equal to 0.5mm is 40-50%;
step (2), the recovered waste slide plate bricks are manually selected, outer ring steel hoops and surface sundries are removed, a jaw crusher, conical crushing and Raymond mill powder are subjected to screening by a screen, iron is removed in the processing and crushing process, and slide plate particles with the particle size of 1-5mm are obtained;
step (3) carrying out wheel milling on the sliding plate particles obtained in the step (2) to eliminate false particles among aggregates, and screening through a three-stage screen to obtain sliding plate particles with the particle sizes of 1-3mm and 3-5 mm;
step (4), after the indexes of the processed sliding plate particles and the turning materials of the stopper rod are detected to be qualified, respectively bagging and warehousing for later use;
step (5), adding 0.1-1mm of stopper turning material, 1-3mm of sliding plate particles and 3-5mm of sliding plate particles into a high-speed stirrer according to a proportion, premixing for 3-5min, adding thermoplastic resin, stirring for 3-5min, adding graphite, stirring for 1-2min, adding 200-mesh brown corundum, 200-mesh silicon carbide and urotropine, stirring for 11-15min, and discharging;
the weight percentage of the components is as follows:
3-5mm of skateboard particles: 20 to 25 percent of the total weight of the mixture,
1-3mm of skateboard particles: 30 to 35 percent of the total weight of the mixture,
turning the stopper rod by 0.1-1 mm: 15-20 percent of the total weight of the mixture,
200 mesh brown corundum: 18 to 23 percent of the total weight of the mixture,
200-mesh silicon carbide: 3 to 8 percent of the total weight of the mixture,
2-7% of graphite;
additionally adding liquid phenolic resin accounting for 3-8% of the total mass and urotropine accounting for 0.2-0.7%;
step (6), placing the stirred material in a constant-temperature constant-humidity ageing room for 2-3 days, rubbing and uniformly turning the ageing material, beating the ageing material to form lumps, weighing the material according to the single-weight requirement, and performing mechanical pressing molding through a 630 press;
and (7) placing the impact plate subjected to mechanical compression molding in a drying kiln car, drying, raising the temperature to 170 ℃ according to a temperature rise curve, preserving the temperature at 170-plus-200 ℃ for more than 6 hours, naturally cooling to room temperature, and taking out of the kiln to obtain the tundish impact plate.
The stopper rod turning material comprises the following components in percentage by mass: al (Al)2O3：65-70%，C：20-25%，MgO：5-10%。
The sliding plate brick comprises the following components in percentage by mass: al (Al)2O3: 70-75%, C, 5-10% and the balance of impurities.
In the step (1), when in wheel milling, a bottom plate and a milling wheel of the adopted wheel mill are corrugated.
In step (5) of the present invention, the silicon carbide is 92 silicon carbide, and the graphite is-195 graphite.
And (7) checking the appearance size of the impact plate after the mechanical pressing forming, controlling the size deviation within +/-2 mm, placing the impact plate with qualified detection ruler in a drying kiln car, and drying in a drying kiln.
The tundish impact plate produced by the method comprises the following components in percentage by mass: al (Al)2O3: 65-75%, C: 10-15%, the balance being impurities, bulk density: 2.5-2.8g/cm3Normal temperature compressive strength: 25-30 Mpa.
The invention has the beneficial effects that:
1. the invention obtains regenerated slide plate granules and stopper rod granules by introducing waste slide plate bricks and stopper rod turning materials into the impact plate and performing secondary processing to recover the plate-shaped corundum granules in the slide plateMgAl as aggregate combined with a certain amount of stopper rod2O4The high-temperature anti-scouring capability of corundum particles and the slag erosion resistance of the aluminum-rich spinel are fully utilized and effectively combined, and the thermoplastic phenolic resin is adopted to produce the novel tundish impact plate, so that the anti-scouring and erosion capabilities of the impact plate in the high-temperature use process are improved, the safety of the impact plate is greatly improved, and the service life of the impact plate is greatly prolonged; the tundish impact plate produced by the method comprises the following components in percentage by weight: al (Al)3O2: 65-70%, C: 10-15%, bulk density: 2.5-2.85g/cm3Normal temperature compressive strength: 25-30Mpa, and the product has the performance indexes of anti-scouring, anti-erosion and thermal shock resistance better than those of the existing product in the use process, the number of continuous casting furnaces of the ladle is increased by 40% in the actual use process, and the risk of steel leakage in the impact area of the tundish is greatly reduced.
2. The recycled waste slide plate brick adopts the conical crushing, so that the roundness of crushed particles is ensured, the particles of the impact plate are ensured to be compactly stacked, the porosity is reduced, and the scouring resistance is improved.
3. The bottom plate and the grinding wheel of the edge runner mill are corrugated, and the edge runner mill can effectively eliminate 1-5mm of waste slide plate aggregate and false particles of recycled stopper rod turning materials and remove slag ash content after processing through edge runner milling and screening, has better apparent roundness and ensures the quality of a novel tundish impact plate.
4. The invention adds the turning material of the stopper rod and recovers Al introduced by the waste slide plate2O3Can produce MgAl by reacting with MgO2O4，MgAl2O4The alkaline slag corrosion resistance is good; MgAl production in the reaction process2O4With volume expansion, if properly controlled, the generated micro-expansion can fill air holes to improve the microstructure, and indirectly improve the scouring resistance of the product.
5. Impurities in the corundum in the waste sliding plate are further separated out in the high-temperature use process, and the raw material has higher purity.
6. The addition of 92 silicon carbide effectively enhances the wear resistance and toughness of the impact plate, prevents the oxidation of graphite in the baking process, reduces cracks generated by thermal shock, and indirectly improves the thermal shock performance of the product.
7. The added stopper turning material can indirectly introduce carbon-containing materials such as graphite, carbon black and the like, so that the thermal shock resistance of the product is effectively improved, the antioxidant such as metal aluminum, silicon and the like is indirectly introduced through the stopper turning material, the addition amount of the antioxidant in the product is reduced, the cost of the product is reduced by more than 70%, the market competitiveness of the product is improved, and the economic benefit is obvious.
Detailed Description
The invention adopts the waste stopper rod turning material and the waste slide plate to recycle and reuse the waste stopper rod turning material and the waste slide plate to produce the tundish impact plate meeting the product standard by combining the specific embodiment and is explained in detail below;
example 1
A method for compositely producing a novel tundish impact plate by combining a stopper rod turning material with a waste sliding plate specifically comprises the following steps:
step (1), firstly, grinding the recycled stopper turning material by a wheel to eliminate false particles among aggregates, and screening by a secondary screen to obtain stopper particles with the particle size of 0.1-1mm, wherein the stopper particles are distributed according to the mass ratio of 0.5-1mm accounting for 50-60% and less than or equal to 0.5mm accounting for 40-50%;
step (2), the recovered waste slide plate bricks are manually selected, outer ring steel hoops and surface sundries are removed, the waste slide plate bricks are subjected to jaw crusher, conical crushing and Raymond mill and then are screened by a screen, iron is removed in the processing and crushing process, and slide plate particles with the particle size of 1-5mm are obtained;
step (3), adopting wheel milling to eliminate false particles among aggregates for the slide plate particles subjected to primary processing and recycling, and screening through a three-stage screen to remove impurities below 1mm to obtain slide plate particles with good quality and particle sizes of 1-3mm and 3-5 mm;
step (4), after the processed sliding plate particles and the turning materials of the stopper rod are detected to be qualified according to indexes, bagging and warehousing; the stopper rod turning material comprises the following components in percentage by mass: al (Al)2O3：68.7%，C：21.2%，MAnd gO: 7.3 percent, and the components of the skateboard particles are as follows by mass percent: al (Al)2O3: 74.5 percent, C, 5.2 percent and the balance of impurities;
step (5), adding the machined 0.1-1mm stopper rod turning material, 1-3mm sliding plate particles and 3-5mm sliding plate particles into a high-speed stirrer according to a ratio, premixing for 3-5min, ensuring that the two materials are fully mixed, adding thermoplastic phenolic resin, stirring for 3-5min (the liquid phenolic resin needs to be preheated to 50 +/-5 ℃ in a steam bath before being added), adding-195 graphite, stirring for 1-2min, adding 200-mesh brown fused alumina, 200-mesh 92-grade silicon carbide and urotropine, stirring for 11min, and discharging;
the weight percentage of the components is as follows:
3-5mm of skateboard particles: 20 percent of the total weight of the mixture,
1-3mm of skateboard particles: 35 percent of the total weight of the mixture,
turning the stopper rod by 0.1-1 mm: 15 percent of the total weight of the mixture is less than or equal to 15 percent,
brown corundum 200 meshes: 23 percent of the total weight of the mixture,
92, 200 meshes of silicon carbide: 5 percent of the total weight of the mixture,
-195 graphite 2%;
liquid phenolic resin (addition): 5 percent of urotropin (additionally added) 0.5 percent;
step (6), placing the stirred materials in a constant-temperature and constant-humidity ageing room for 2-3 days, conveying the aged materials to the side of a press, rubbing and turning the materials uniformly, beating the materials to form lumps, weighing the materials according to the single-weight requirement, and performing machine pressing molding on a 630-ton press, wherein the weight is 2: 3;
and (7) checking the appearance size after mechanical pressing forming, controlling the size deviation within +/-2 mm, placing the impact plate with qualified detection ruler in a drying kiln car for drying, raising the temperature to 170 ℃ according to a temperature rise curve, preserving the heat at the temperature of 170 ℃ and 200 ℃ for more than 6 hours, naturally cooling to the room temperature of 18-25 ℃, taking out of the kiln, and pushing the kiln car to a stacking area for stacking after the brick body is cooled.
The main indexes of the impact plate product in the tundish in the kiln are detected, and the main indexes are as follows by weight percent: al (Al)2O3: 72.8%, C: 13.2%, the balance being impurities, bulk density: 2.73g/cm3Normal temperature compressive strength: 27.5 MPa.
Example 2
A method for compositely producing a novel tundish impact plate by combining a stopper rod turning material with a waste sliding plate specifically comprises the following steps:
step (1), firstly, grinding the recycled stopper turning material by a wheel to eliminate false particles among aggregates, and screening by a secondary screen to obtain stopper particles with the particle size of 0.1-1mm, wherein the stopper particles are distributed according to the mass ratio of 0.5-1mm accounting for 50-60% and less than or equal to 0.5mm accounting for 40-50%;
step (2), the recovered waste slide plate bricks are manually selected, outer ring steel hoops and surface sundries are removed, the waste slide plate bricks are subjected to jaw crusher, conical crushing and Raymond mill and then are screened by a screen, iron is removed in the processing and crushing process, and slide plate particles with the particle size of 1-5mm are obtained;
step (3), adopting wheel milling to eliminate false particles among aggregates for the slide plate particles subjected to primary processing and recycling, and screening through a three-stage screen to remove impurities below 1mm to obtain slide plate particles with good quality and particle sizes of 1-3mm and 3-5 mm;
step (4), after the processed sliding plate particles and the turning materials of the stopper rod are detected to be qualified according to indexes, bagging and warehousing; the stopper rod turning material comprises the following components in percentage by mass: al (Al)2O3: 68.7%, C: 21.2%, MgO: 7.3 percent, and the components of the skateboard particles are as follows by mass percent: al (Al)2O3: 74.5%, C: 5.2 percent of the total weight of the mixture, and the balance of impurities;
step (5), adding the machined 0.1-1mm stopper rod turning material, 1-3mm sliding plate particles and 3-5mm sliding plate particles into a high-speed stirrer according to a ratio, premixing for 3-5min, ensuring that the two materials are fully mixed, adding thermoplastic phenolic resin, stirring for 3-5min (the liquid phenolic resin needs to be preheated to 50 +/-5 ℃ in a steam bath before being added), adding-195 graphite, stirring for 1-2min, adding 200-mesh brown fused alumina, 200-mesh 92-grade silicon carbide and urotropine, stirring for 11min, and discharging;
the weight percentage of the components is as follows:
3-5mm of skateboard particles: 23 percent of the total weight of the mixture,
1-3mm of skateboard particles: 31 percent of the total weight of the mixture,
turning the stopper rod by 0.1-1 mm: 16 percent of the total weight of the mixture,
brown corundum 200 meshes: 20 percent of the total weight of the mixture,
92, 200 meshes of silicon carbide: 6 percent of the total weight of the mixture,
-195 graphite 4%;
liquid phenolic resin (addition): 6%, urotropin (added): 0.6 percent;
step (6), placing the stirred materials in a constant-temperature and constant-humidity ageing room for 2-3 days, conveying the aged materials to the side of a press, rubbing and turning the materials uniformly, beating the materials to form lumps, weighing the materials according to the single-weight requirement, and performing machine pressing molding on a 630-ton press, wherein the weight is 2: 3;
and (7) checking the appearance size after mechanical pressing forming, controlling the size deviation within +/-2 mm, placing the impact plate with qualified detection ruler in a drying kiln car for drying, raising the temperature to 170 ℃ according to a temperature rise curve, preserving the heat at the temperature of 170 ℃ and 200 ℃ for more than 6 hours, naturally cooling to the room temperature of 18-25 ℃, taking out of the kiln, and pushing the kiln car to a stacking area for stacking after the brick body is cooled.
Sampling and inspecting the qualified products discharged from the kiln according to chemical inspection regulations, wherein the main indexes of the products are as follows by weight percent: al (Al)3O2: 71.12%, C: 14.89%, balance impurities, volume density: 2.62g/cm3Normal temperature compressive strength: 25.8 MPa.
Example 3
A method for compositely producing a novel tundish impact plate by combining a stopper rod turning material with a waste sliding plate specifically comprises the following steps:
step (1), firstly, grinding the recycled stopper turning material by a wheel to eliminate false particles among aggregates, and screening by a secondary screen to obtain stopper particles with the particle size of 0.1-1mm, wherein the stopper particles are distributed according to the mass ratio of 0.5-1mm accounting for 50-60% and less than or equal to 0.5mm accounting for 40-50%;
step (2), the recovered waste slide plate bricks are manually selected, outer ring steel hoops and surface sundries are removed, the waste slide plate bricks are subjected to jaw crusher, conical crushing and Raymond mill and then are screened by a screen, iron is removed in the processing and crushing process, and slide plate particles with the particle size of 1-5mm are obtained;
step (3), adopting wheel milling to eliminate false particles among aggregates for the slide plate particles subjected to primary processing and recycling, and screening through a three-stage screen to remove impurities below 1mm to obtain slide plate particles with good quality and particle sizes of 1-3mm and 3-5 mm;
step (4), after the processed sliding plate particles and the turning materials of the stopper rod are detected to be qualified according to indexes, bagging and warehousing; the stopper rod turning material comprises the following components in percentage by mass: al (Al)2O3:: 68.7%, C: 21.2%, MgO: 7.3 percent, and the components of the skateboard particles are as follows by mass percent: al (Al)2O3: 74.5 percent, C, 5.2 percent of residual impurities;
step (5), adding the machined stopper rod turning material with the diameter of 0.1-1mm, the machined sliding plate particles with the diameter of 1-3mm and the machined sliding plate particles with the diameter of 3-5mm into a high-speed stirrer according to a ratio, premixing for 3-5min, ensuring that the two materials are fully mixed, adding thermoplastic phenolic resin, stirring for 3-5min (the liquid phenolic resin needs to be preheated to 50 +/-5 ℃ in a steam bath before being added), adding-195 graphite, stirring for 1-2min, finally adding 200-mesh brown fused alumina, 200-mesh 92-grade silicon carbide and urotropine, stirring for 11min, discharging, and passing a 25mm screen during discharging;
the weight percentage of the components is as follows:
3-5mm of skateboard particles: 21 percent of the total weight of the mixture,
1-3mm of skateboard particles: 30 percent of the total weight of the mixture,
turning the stopper rod by 0.1-1 mm: 20 percent of the total weight of the mixture,
brown corundum 200 meshes: in the range of 22%,
92, 200 meshes of silicon carbide: 4 percent of the total weight of the mixture,
-195% graphite 3%;
liquid phenolic resin (addition): 4 percent of urotropin (additionally added) 0.4 percent;
step (6), placing the stirred materials in a constant-temperature and constant-humidity ageing room for 2-3 days, conveying the aged materials to the side of a press, rubbing and turning the materials uniformly, beating the materials to form lumps, weighing the materials according to the single-weight requirement, and performing machine pressing molding on a 630-ton press, wherein the weight is 2: 3;
and (7) checking the appearance size after mechanical pressing forming, controlling the size deviation within +/-2 mm, placing the impact plate with qualified detection ruler in a drying kiln car for drying, raising the temperature to 170 ℃ according to a temperature rise curve, preserving the heat at the temperature of 170 ℃ and 200 ℃ for more than 6 hours, naturally cooling to the room temperature of 18-25 ℃, taking out of the kiln, and pushing the kiln car to a stacking area for stacking after the brick body is cooled.
Sampling and inspecting the qualified products discharged from the kiln according to chemical inspection regulations, wherein the main indexes of the products are as follows by weight percent: al (Al)2O3: 73.18%, C: 12.98%, balance impurities, volume density: 2.71g/cm3Normal temperature compressive strength: 28.5 MPa.
In the embodiment 1-3 of the invention, during stacking, appearance inspection is carried out strictly according to standards, unqualified bricks are placed in a waste brick area for centralized treatment, qualified tundish impact plates are stacked on a wooden supporting plate, corner falling and collision are avoided during stacking, the stacking is smooth and firm, the required height of a brick pile is less than 1.2m, the width is less than 1.1m, the thickness is less than 1.1m, and the brick pile is packaged firmly and hoisted to a specified storage area after stacking.
In the step ((5), the error of the material with the addition amount of more than 100kg is not more than 1%, the error of the material with the addition amount of 50-100kg is not more than 0.5%, and the error of the material with the addition amount of less than 50kg is not more than 0.05%.
Claims (7)
1. A method for compositely producing a tundish impact plate by combining a stopper rod turning material with a waste slide plate is characterized by comprising the following steps of: the method specifically comprises the following steps:
step (1), grinding the recycled stopper turning material to eliminate false particles among aggregates, and screening the stopper turning material through a secondary screen to obtain stopper particles with the particle size of 0.1-1mm, wherein the particle size distribution is that the stopper particles with the particle size of 0.5-1mm account for 50-60% and the particle size distribution with the particle size of less than or equal to 0.5mm is 40-50%;
step (2), the recovered waste slide plate bricks are manually selected, outer ring steel hoops and surface sundries are removed, a jaw crusher, conical crushing and Raymond mill powder are subjected to screening by a screen, iron is removed in the processing and crushing process, and slide plate particles with the particle size of 1-5mm are obtained;
step (3) carrying out wheel milling on the sliding plate particles obtained in the step (2) to eliminate false particles among aggregates, and screening through a three-stage screen to obtain sliding plate particles with the particle sizes of 1-3mm and 3-5 mm;
step (4), after the indexes of the processed sliding plate particles and the turning materials of the stopper rod are detected to be qualified, respectively bagging and warehousing for later use;
step (5), adding 0.1-1mm of stopper turning material, 1-3mm of sliding plate particles and 3-5mm of sliding plate particles into a high-speed stirrer according to a proportion, premixing for 3-5min, adding thermoplastic liquid phenolic resin, stirring for 3-5min, adding graphite, stirring for 1-2min, adding 200-mesh brown corundum, 200-mesh silicon carbide and urotropine, stirring for 11-15min, and discharging;
the weight percentage is as follows:
3-5mm of skateboard particles: 20 to 25 percent of the total weight of the mixture,
1-3mm of skateboard particles: 30 to 35 percent of the total weight of the mixture,
turning the stopper rod by 0.1-1 mm: 15-20 percent of the total weight of the mixture,
200 mesh brown corundum: 18 to 23 percent of the total weight of the mixture,
200-mesh silicon carbide: 3 to 8 percent of the total weight of the mixture,
2-7% of graphite;
additionally adding thermoplastic liquid phenolic resin accounting for 3-8% of the total mass and urotropine accounting for 0.2-0.7% of the total mass;
step (6), placing the stirred material in a constant-temperature constant-humidity ageing room for 2-3 days, rubbing and uniformly turning the ageing material, beating the ageing material to form lumps, weighing the material according to the single-weight requirement, and performing machine pressing forming through a ton press;
placing the impact plate subjected to mechanical compression molding in a drying kiln car, drying, heating to 170 ℃ according to a heating curve, preserving the heat at the temperature of 170-200 ℃ for more than 6 hours, naturally cooling to room temperature, and taking out of the kiln to obtain a tundish impact plate;
the stopper rod turning material comprises the following components in percentage by mass: al (Al)2O3 ：65-70%，C：20-25%，MgO：5-10%。
2. The method for compositely producing the tundish impact plate by adopting the stopper rod turning material and the waste slide plate according to the claim 1, is characterized in that: the sliding plate brick comprises the following components in percentage by mass: al (Al)2O3: 70-75%, C, 5-10% and the balance of impurities.
3. The method for compositely producing the tundish impact plate by adopting the stopper rod turning material and the waste slide plate according to the claim 1, is characterized in that: in the step (1), when in wheel milling, a bottom plate and a milling wheel of the adopted wheel mill are corrugated.
4. The method for compositely producing the tundish impact plate by adopting the stopper rod turning material and the waste slide plate according to the claim 1, is characterized in that: in the step (5), the silicon carbide is 92 silicon carbide.
5. The method for compositely producing the tundish impact plate by using the stopper rod turning material and the waste slide plate according to any one of claims 1 to 4, is characterized in that: in the step (5), the graphite is-195 graphite.
6. The method for compositely producing the tundish impact plate by adopting the stopper rod turning material and the waste slide plate according to the claim 5, is characterized in that: and (7) checking the appearance size of the impact plate after the mechanical pressing forming, controlling the size deviation to be +/-2 mm, placing the impact plate with a qualified detection ruler in a drying kiln car, and drying in a drying kiln.
7. A tundish impact plate produced according to the method of claim 1 or 6, characterised in that: the tundish impact plate comprises the following components in percentage by mass: al (Al)2O3: 65-75%, C: 10-15%, the balance being impurities, bulk density: 2.5-2.8g/cm3Normal temperature compressive strength: 25-30 Mpa.
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| CN102139904A (en) * | 2010-01-29 | 2011-08-03 | 上海凡奋耐火材料有限公司 | Production process for extracting white corundum and sub-white-corundum by utilizing whole castables of waste steel scrap |
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| CN106946549A (en) * | 2017-04-05 | 2017-07-14 | 海城市中兴高档镁质砖有限公司 | A kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material and production method |
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