CN110981508A - Refractory ramming material for repairing bottom brick of hot-metal ladle and repairing method - Google Patents
Refractory ramming material for repairing bottom brick of hot-metal ladle and repairing method Download PDFInfo
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- CN110981508A CN110981508A CN201911257429.8A CN201911257429A CN110981508A CN 110981508 A CN110981508 A CN 110981508A CN 201911257429 A CN201911257429 A CN 201911257429A CN 110981508 A CN110981508 A CN 110981508A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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Abstract
The invention discloses a refractory ramming material for repairing a bottom brick of a hot-metal ladle and a repairing method. The method comprises the steps of weighing and mixing high-alumina bauxite aggregate, kyanite powder, silicon carbide powder, calcined alumina micropowder, silicon micropowder, pure calcium aluminate cement and soft clay powder in parts by weight, adding a binding agent twice, stirring and sealing to obtain a ramming material, coating aluminum dihydrogen phosphate on a tank bottom brick to be repaired, filling the ramming material, and baking at high temperature to finish repairing. The ramming material disclosed by the invention is good in high-temperature resistance and impact resistance, so that the service cycle of a hot-metal ladle is prolonged by about 50 times; the maintenance time of the bottom brick of the hot-metal ladle is 2-2.5 hours, the maintenance time is greatly shortened, and the maintenance cost is reduced. The ramming mass also has a good heat preservation effect, and reduces the heat loss in the molten iron transportation process.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a refractory ramming material for repairing a bottom brick of a hot-metal ladle and a repairing method.
Background
In the modern steel smelting process in China, molten iron which is smelted by a blast furnace and has the temperature of 1300-1450 ℃ is generally transported to a steel plant by a molten iron tank. Therefore, the hot metal ladle plays a very important role in the use process as a hot metal transportation container. The existing common hot metal ladle building scheme is that a ladle bottom center brick is built by adopting aluminum-silicon carbide-carbon bricks, and compared with bricks at other parts in a permanent layer and a working layer of a hot metal ladle, the hot metal ladle bottom brick resists the impact, erosion and scouring of molten iron, so that the requirements on the ladle bottom brick are much higher than those of refractory bricks at other parts. In order to save cost, steel enterprises often add part of scrap steel into a hot metal ladle, so that the addition of molten iron is reduced to reduce the cost. However, the scrap steel often contains alloys containing zinc, lead and the like or heavy metals, and is difficult to separate. In the process of adding molten iron, the alloy or heavy metal reacts violently with refractory bricks at the bottom of the tank in the melting process, the refractory bricks at the bottom of the tank are locally corroded to form pits, the depth is deep, and potential safety hazards exist. Present maintenance mode will corrode serious incomplete brick and demolish, and the new brick of reuse is repaired, because of the jar bottom brick is the sphere brick, the outer mouthful is little, and the internal orifice is big, hardly with the suitable embedding tank bottoms of last piece joint close brick inside, even with slitting saw processing brick, the brickwork joint is also bigger after the construction finishes, still has the potential safety hazard. The labor intensity of repairing the hot metal ladle is high, and the time is long; the production process of the refractory brick is complex, the production period is long, and the energy consumption is high. The method for re-building the tank bottom bricks is time-consuming and labor-consuming, the service cycle is shortened, and the repair cost is increased. Therefore, a new method for repairing a tank bottom brick is needed, so that the repaired hot-metal ladle has long service life, simple repairing method and low cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel method for repairing a bottom brick of a hot metal ladle, aiming at improving the safety of the repaired abnormal pot bottom brick, solving the problem of lower safety of the repaired abnormal pot bottom brick in the background technology, improving the erosion resistance of the pot bottom brick, prolonging the service cycle and reducing the repairing times.
The invention is realized by the following technical scheme:
in a first aspect of the invention, a refractory ramming mass for repairing a ladle bottom brick is provided. The feed comprises the following raw materials in parts by weight: 60-85 parts of high bauxite aggregate, 5-6 parts of kyanite powder, 3-5 parts of silicon carbide powder, 2-3 parts of calcined alumina micro powder, 1-3 parts of silicon micro powder, 1-2 parts of pure calcium aluminate cement, 2-4 parts of soft clay powder and 11-14 parts of a binding agent.
Preferably, the bauxite aggregate is 85# bauxite aggregate, and the particle sizes of the bauxite aggregate are 10-5 mm, 5-3 mm, 3-1 mm, 1-0.088 mm and 0.074mm respectively; wherein the mass fraction of the particle size of 10-5 mm is 15-20%, the mass fraction of the particle size of 5-3 mm is 20-25%, the mass fraction of the particle size of 3-1 mm is 15-20%, the mass fraction of the particle size of 1-0.088 mm is 15-20%, and the mass fraction of the particle size of 0.074mm is 20-25%.
Preferably, the granularity of the cyanite powder is 0.5-0.2 mm.
Preferably, the silicon carbide is 90# silicon carbide, and the particle size is 1-0.088 mm; the silicon carbide powder is 90# silicon carbide powder with the granularity of 0.074 mm.
Preferably, the particle size of the soft clay powder is 0.074 mm.
Preferably, the binder is aluminum dihydrogen phosphate.
In a second aspect of the invention, a method for preparing a refractory ramming mass for repairing a ladle bottom brick is provided. The method comprises the following steps:
(1) uniformly mixing the raw materials except the binding agent to obtain a premixed dry material;
(2) adding 6-8 parts of a binding agent into the premixed dry material, stirring and mixing for 10-15 minutes, and sealing and storing for 16 hours to obtain a semi-wet mixed material;
(3) and adding the rest of the bonding agent into the semi-wet mixed material, stirring and mixing for 8-10 minutes to form a material paste mass, discharging, sealing and packaging to obtain the refractory ramming material.
In a third aspect of the invention, there is provided the use of a refractory ramming mass for repairing a hot-metal ladle bottom brick in repairing a hot-metal ladle bottom brick.
In a fourth aspect of the invention, a method of repairing a hot-metal ladle bottom brick with a refractory ramming mass for repairing a hot-metal ladle bottom brick is provided. The method comprises the following steps: removing iron slag attached to the surface of a pot bottom brick and an eroded pot bottom brick of a hot metal pot, painting and wetting the surface of the brick to be repaired with aluminum dihydrogen phosphate, filling the refractory ramming material according to any one of claims 1 to 6, ramming strongly with the ramming surface higher than a normal eroded surface, baking at 100-400 ℃ for 40-60 min, and baking at 800-1100 ℃ for 40-60 min to finish repairing.
The invention has the beneficial effects that:
1. the repairing method of the invention improves the safe use coefficient of the tank bottom and overcomes the defects of difficult construction by brick repair and difficult control of brick joints.
2. The repairing method of the invention has simple construction method, easy operation, high working efficiency and reduced repairing time.
3. The refractory ramming mass has strong plasticity, small heat conductivity coefficient, can be quickly hardened after being baked, has strong scouring resistance and erosion resistance, and can be quickly combined with the surface of the original refractory brick under the high-temperature condition; the use times of the hot-metal ladle are improved, and the maintenance times of the hot-metal ladle are reduced; the maintenance time is saved; and the heat loss in the molten iron transportation process is reduced.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
As described in the background art, the pot bottom brick is the part which is firstly contacted with molten iron in the use process of the hot-metal ladle, and is not only subjected to molten iron impact, but also subjected to corrosion of substances such as heavy metals and the like, so that the pot bottom brick is uneven and seriously corroded, and is attached with molten iron residues. Based on the method, the invention provides the refractory ramming mass for repairing the bottom brick of the hot-metal ladle and the method for repairing the bottom brick of the hot-metal ladle by using the refractory ramming mass.
The refractory materials adopted by the bottom bricks of the hot metal ladle generally comprise common clay refractory bricks, compact clay refractory bricks, high-density clay refractory bricks, magnesium bricks, silicon bricks, alumina-magnesia carbon bricks and aluminum-silicon carbide-carbon bricks. In recent years, aluminum-silicon carbide-carbon bricks are increasingly used in tank bottom bricks due to better performance. The ramming mass is provided for a repairing material taking an aluminum-silicon carbide-carbon brick as a tank bottom brick, and the formula design is carried out according to the contents of aluminum oxide, silicon carbide and carbon in the aluminum-silicon carbide-carbon brick, so that the prepared ramming mass can effectively repair the aluminum-silicon carbide-carbon brick.
The refractory ramming mass for repairing the bottom bricks of the hot-metal ladle comprises the following raw materials in parts by weight: 60-85 parts of high bauxite aggregate, 5-6 parts of kyanite powder, 3-5 parts of silicon carbide powder, 2-3 parts of calcined alumina micro powder, 1-3 parts of silicon micro powder, 1-2 parts of pure calcium aluminate cement, 2-4 parts of soft clay powder and 11-14 parts of a binding agent. The high-bauxite aggregate is No. 85 high-bauxite aggregate, and the particle sizes of the high-bauxite aggregate are respectively 10-5 mm, 5-3 mm, 3-1 mm, 1-0.088 mm and 0.074 mm; wherein the mass fraction of the particle size of 10-5 mm is 15-20%, the mass fraction of the particle size of 5-3 mm is 20-25%, the mass fraction of the particle size of 3-1 mm is 15-20%, the mass fraction of the particle size of 1-0.088 mm is 15-20%, and the mass fraction of the particle size of 0.074mm is 20-25%. The high bauxite aggregate particles with different granularities are matched, so that better stacking density can be achieved, materials are combined more closely, the product density is increased, and the slag resistance is improved. The soft clay has good dispersibility and plasticity and good sinterability.
Under the action of high temperature, the ramming mass disclosed by the invention can form silicon carbide covalent bonding with an aluminum-silicon carbide-carbon brick, so that the fusion property of the two materials is improved. In order to increase the plasticity and the rapid hardening of the ramming mass, the binding agent is added in two times in the preparation process of the ramming mass. And adding the bonding agent for the first time, sealing and storing for 16h to obtain a semi-wet mixture, and adding the rest bonding agent into the mixture for stirring, sealing and storing to ensure that the raw materials of each component of the ramming mass are fully and uniformly mixed. In order to reduce the repair time and repair cost, the invention carries out filling repair on the basis of the original corroded tank bottom brick. However, even if the repair is performed using the same material as the original firebrick or a different material, the repaired portion may be cracked by molten iron impact or high temperature during the use after the repair. The eroded ladle bottom brick is coated with paint and wetted by aluminum dihydrogen phosphate, the associativity of the ramming material and the ladle bottom brick is increased, and the phenomenon that the joint between the ramming material and the ladle bottom brick cracks in the later use process to influence the safety of a molten iron ladle is prevented. In order to improve the erosion resistance and the erosion resistance of the ramming material, the ramming material cannot be directly baked at high temperature, so that the internal and external temperatures of the ramming material are uneven, and the ramming material is locally cracked in the later use process. Baking at a relatively low temperature to enable the internal and external temperatures of the ramming mass to be consistent, baking at a high temperature to accelerate the hardening of the ramming mass, and enabling aluminum dihydrogen phosphate to form silicon carbide covalent bonding at a bonding part between an original refractory brick and the ramming mass and form a new phase by virtue of chemical reaction, so that the original refractory brick and the ramming mass are combined into a whole and are firmer. And later, the molten iron can resist impact and erosion. The height of the ramming surface after repairing is higher than that of the bottom brick of the hot-metal ladle before being eroded, the part is relatively weak, and the part is thickened and heightened, so that the erosion resistance and the scouring resistance can be improved. The repaired hot metal ladle can be directly used without drying or standing for a period of time. The molten iron may generate heat loss during transportation, so that the refractory bricks in the molten iron tank need to have good heat preservation performance. In order to improve the heat insulation performance of the ramming mass, high-alumina aggregates with different granularities are adopted, and the ramming mass prepared by the high-alumina aggregates with different granularities and different weight fractions has excellent heat insulation performance and greatly reduced heat conductivity coefficient after the investigation of the inventor.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described in detail below with reference to specific embodiments. If the experimental conditions not specified in the examples are specified, the conditions are generally conventional or recommended by the reagent company; the raw materials, consumables and the like used in the following examples are commercially available unless otherwise specified. Wherein the soft clay powder can be purchased from tourmaline mineral products, Inc. of Shijiazhuang; pneumatic tamper machines are available from kning soda machines ltd, model number: D4.
example 1
(1) 100Kg of 85# high bauxite aggregate with the granularity of 10mm, 150Kg of 85# high bauxite aggregate with the granularity of 5mm, 100Kg of 85# high bauxite aggregate with the granularity of 3mm, 100Kg of 85# high bauxite aggregate with the granularity of 1mm, 150Kg of 85# high bauxite aggregate with the granularity of 0.074mm, 50Kg of kyanite powder with the granularity of 0.5mm, 30Kg of 90# silicon carbide with the granularity of 1mm, 30Kg of 90# silicon carbide powder with the granularity of 0.074mm, 20Kg of calcined alumina micropowder, 10Kg of 95# silicon micropowder, 10Kg of pure calcium aluminate cement and 20Kg of soft clay powder with the granularity of 0.074mm are mixed uniformly; adding 60Kg of aluminum dihydrogen phosphate, stirring for 10 minutes by using a stirrer, and sealing and storing for 16 hours; adding 50Kg of aluminum dihydrogen phosphate, stirring for 8 minutes by a stirrer to form a material paste dough, discharging, sealing and packaging.
(2) Repairing a hot metal ladle with the capacity of 100 t: removing iron slag attached to the surface of a tank bottom brick and an eroded ladle bottom brick, then coating and wetting the surface of the brick to be repaired with aluminum dihydrogen phosphate, adding the prepared fire-resistant ramming material into a pneumatic ramming machine to fill the eroded ladle bottom brick, wherein the height of the filled ramming surface is consistent with that of a normal ladle bottom brick, and after ramming is finished, baking for 1h at 100 ℃ and then baking for 1h at 800 ℃ to finish repairing.
Example 2
(1) 150Kg of 85# high bauxite aggregate with the granularity of 5mm, 00Kg of 85# high bauxite aggregate with the granularity of 3mm, 150Kg of 85# high bauxite aggregate with the granularity of 1mm, 150Kg of 85# high bauxite aggregate with the granularity of 0.088mm, 200Kg of 85# high bauxite aggregate with the granularity of 0.074mm, 60Kg of kyanite powder with the granularity of 0.2mm, 50Kg of 90# silicon carbide with the granularity of 0.088mm, 50Kg of 90# silicon carbide powder with the granularity of 0.074mm, 30Kg of calcined alumina micropowder, 30Kg of 95# silicon micropowder, 20Kg of pure calcium aluminate cement and 40Kg of soft clay powder with the granularity of 0.074mm are mixed uniformly; adding 80Kg of aluminum dihydrogen phosphate, stirring for 15 minutes by a stirrer, and storing for 16 hours in a sealed manner; adding 60Kg of aluminum dihydrogen phosphate, stirring for 10 minutes by a stirrer to form a material paste mass, discharging, sealing and packaging.
(2) Repairing a hot metal ladle with the capacity of 150 t: removing iron slag attached to the surface of a tank bottom brick and an eroded ladle bottom brick, then coating and wetting the surface of the brick to be repaired with aluminum dihydrogen phosphate, adding the prepared fire-resistant ramming material into a pneumatic ramming machine to fill the eroded ladle bottom brick, wherein the height of the filled ramming surface is consistent with that of a normal ladle bottom brick, and after ramming is finished, baking at 400 ℃ for 40min, and then baking at 1100 ℃ for 40min to finish repairing.
Comparative example 1
(1) 500Kg of brown corundum particles with the granularity of 3mm, 150Kg of silicon carbide powder with the granularity of 0.074mm, 30Kg of 60-mesh cyanite powder, 30Kg of 60-mesh Guangxi soil, 50Kg of 60-mesh ferrosilicon nitride and 100 mu m of active α -Al2O350Kg of powder, 35Kg of 3 μm silica micropowder, 30Kg of 60-mesh metal silica powder, 25Kg of spherical asphalt and 25Kg of 60-mesh soil-like graphite; 60Kg of pure calcium aluminate cement of 100 μm is mixed uniformly; adding 120Kg of water, stirring for 30min by a stirrer, uniformly mixing, and discharging for later use.
(2) Repairing a hot metal ladle with the capacity of 150 t: and removing iron slag attached to the surface of the tank bottom brick and the eroded ladle bottom brick, adding the prepared refractory ramming material into a pneumatic ramming machine to fill the eroded ladle bottom brick, wherein the filled ramming surface is consistent with the height of the normal ladle bottom brick, and after ramming is finished, baking at 400 ℃ for 40min, and then baking at 1100 ℃ for 40min to finish repairing.
Comparative example 2
(1) 100Kg of 85# high bauxite aggregate with the granularity of 10mm, 150Kg of 85# high bauxite aggregate with the granularity of 5mm, 100Kg of 85# high bauxite aggregate with the granularity of 3mm, 100Kg of 85# high bauxite aggregate with the granularity of 1mm, 150Kg of 85# high bauxite aggregate with the granularity of 0.074mm, 50Kg of kyanite powder with the granularity of 0.5mm, 30Kg of 90# silicon carbide with the granularity of 1mm, 30Kg of 90# silicon carbide powder with the granularity of 0.074mm, 20Kg of calcined alumina micropowder, 10Kg of 95# silicon micropowder, 10Kg of pure calcium aluminate cement and 20Kg of soft clay powder with the granularity of 0.074mm are mixed uniformly; adding 60Kg of aluminum dihydrogen phosphate, stirring for 10 minutes by using a stirrer, and sealing and storing for 16 hours; adding 50Kg of aluminum dihydrogen phosphate, stirring for 8 minutes by a stirrer to form a material paste dough, discharging, sealing and packaging.
(2) Repairing a hot metal ladle with the capacity of 100 t: and removing iron slag attached to the surface of the tank bottom brick and the eroded ladle bottom brick, adding the prepared fire-resistant ramming material into a pneumatic ramming machine to fill the eroded ladle bottom brick, wherein the height of the filled ramming surface is consistent with that of a normal ladle bottom brick, and after ramming is finished, baking the pot bottom brick at 100 ℃ for 1h, baking the pot bottom brick at 800 ℃ for 1h, and drying the pot bottom brick for 6h to finish repairing.
Test example 1
The tank bottom bricks repaired in examples 1-2 and comparative examples 1-2 were subjected to performance tests, and the results are shown in table 1.
Table 1 results of performance testing
As can be seen from Table 1, the ramming mass prepared by the method of the invention has higher impact resistance, high temperature resistance and thermal shock resistance than the comparative example. The coefficient of heat conductivity is much higher than that of the comparative example 1, so that the ramming material disclosed by the invention is excellent in heat insulation performance, and the loss of heat can be effectively reduced in the transportation process of a molten iron tank.
Test example 2
The statistics of the number of times of normal molten iron loading was performed on the molten iron tanks repaired in examples 1 to 2 and comparative examples, and the obtained results are shown in table 2.
TABLE 2 statistical results of the number of loads
| Item | Hot metal pot capacity (T) | Period of use (times) | Repair time (h) |
| Example 1 | 100 | 261 | 2 |
| Example 2 | 150 | 255 | 2.5 |
| Comparative example 1 | 150 | 208 | 36 |
| Comparative example 2 | 100 | 241 | 8 |
As can be seen from Table 2, the repairing method can increase the use times of the hot metal ladle by about 50 times, the hot metal ladle can be directly put into use after being repaired by the method, the ramming mass can be conveniently repaired and quickly hardened under high-temperature baking without drying, and the repairing time is greatly saved. In contrast, in comparative example 2, the same ramming mass formulation was used, but aluminum dihydrogen phosphate was not used in the repair, and therefore, it was necessary to dry naturally for 6 hours after the repair in order to improve the bonding effect. Thus, the repair time is greatly increased, and the repair cost is increased.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments are merely for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions which are made by those skilled in the art within the spirit of the present invention are also within the scope of the claims of the present invention.
Claims (9)
1. The refractory ramming mass for repairing the bottom brick of the hot-metal ladle is characterized by comprising the following raw materials in parts by weight: 60-85 parts of high bauxite aggregate, 5-6 parts of kyanite powder, 3-5 parts of silicon carbide powder, 2-3 parts of calcined alumina micro powder, 1-3 parts of silicon micro powder, 1-2 parts of pure calcium aluminate cement, 2-4 parts of soft clay powder and 11-14 parts of a binding agent.
2. The refractory ramming mass according to claim 1, wherein the bauxite aggregate is No. 85 bauxite aggregate, and the particle sizes of the bauxite aggregate are respectively 10-5 mm, 5-3 mm, 3-1 mm, 1-0.088 mm and 0.074 mm; wherein the mass fraction of the particle size of 10-5 mm is 15-20%, the mass fraction of the particle size of 5-3 mm is 20-25%, the mass fraction of the particle size of 3-1 mm is 15-20%, the mass fraction of the particle size of 1-0.088 mm is 15-20%, and the mass fraction of the particle size of 0.074mm is 20-25%.
3. The refractory ramming mass of claim 1, wherein the sapphire powder has a particle size of 0.5-0.2 mm.
4. The refractory ramming mass of claim 1, wherein the silicon carbide is 90# silicon carbide with a particle size of 1-0.088 mm; the silicon carbide powder is 90# silicon carbide powder with the granularity of 0.074 mm.
5. The refractory ramming mass of claim 1, wherein the particle size of the soft clay powder is 0.074 mm.
6. The refractory ramming mass of claim 1, wherein the binder is aluminum dihydrogen phosphate.
7. A method of producing a refractory ramming mass according to any one of claims 1 to 6, characterized in that it comprises the steps of:
(1) uniformly mixing the raw materials except the binding agent to obtain a premixed dry material;
(2) adding 6-8 parts of a binding agent into the premixed dry material, stirring and mixing for 10-15 minutes, and sealing and storing for 16 hours to obtain a semi-wet mixed material;
(3) and adding the rest of the bonding agent into the semi-wet mixed material, stirring and mixing for 8-10 minutes to form a material paste mass, discharging, sealing and packaging to obtain the refractory ramming material.
8. Use of the refractory ramming mass of any one of claims 1 to 6 in repairing a ladle bottom brick.
9. A method for repairing a ladle bottom brick of a hot metal ladle by using the refractory ramming mass according to any one of claims 1 to 6, wherein the method comprises the following steps: removing iron slag attached to the surface of a ladle bottom brick and an eroded part of the ladle bottom brick, painting and wetting the surface of the brick to be repaired with aluminum dihydrogen phosphate, filling the refractory ramming mass according to any one of claims 1 to 6, ramming strongly, wherein the ramming surface is higher than the height of the ladle bottom brick before erosion, baking at 100-400 ℃ for 40-60 min after ramming is finished, and baking at 800-1100 ℃ for 40-60 min to finish repairing.
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Cited By (4)
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| CN111995408A (en) * | 2020-08-18 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Repairing material and repairing method for working layer at bottom of molten iron tank |
| CN113072385A (en) * | 2021-03-09 | 2021-07-06 | 山东九龙新材料有限公司 | Ladle opening castable added with waste daily glass powder |
| CN113292348A (en) * | 2021-05-10 | 2021-08-24 | 中国铝业股份有限公司 | Forming method of silicon carbide ramming mass |
| CN116354705A (en) * | 2023-04-17 | 2023-06-30 | 天津巴莫科技有限责任公司 | Heat-conducting refractory mortar and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111995408A (en) * | 2020-08-18 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Repairing material and repairing method for working layer at bottom of molten iron tank |
| CN111995408B (en) * | 2020-08-18 | 2022-07-05 | 武汉钢铁集团耐火材料有限责任公司 | Repairing material and repairing method for working layer at bottom of molten iron tank |
| CN113072385A (en) * | 2021-03-09 | 2021-07-06 | 山东九龙新材料有限公司 | Ladle opening castable added with waste daily glass powder |
| CN113292348A (en) * | 2021-05-10 | 2021-08-24 | 中国铝业股份有限公司 | Forming method of silicon carbide ramming mass |
| CN116354705A (en) * | 2023-04-17 | 2023-06-30 | 天津巴莫科技有限责任公司 | Heat-conducting refractory mortar and preparation method thereof |
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