CN109336621B - Method for producing aluminum-carbon coated rim material by adopting waste hot-blast stove balls and introducing recycling stopper rods - Google Patents
Method for producing aluminum-carbon coated rim material by adopting waste hot-blast stove balls and introducing recycling stopper rods Download PDFInfo
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Abstract
The invention provides a method for producing aluminum carbon by adopting waste hot blast furnace balls and introducing a recovery stopper rodThe method for coating the edge material comprises the steps of recovering waste hot blast stove balls, introducing a stopper turning material waste and alumina superfine powder ultra-low cement combination system, adding aluminum-carbon coating edge material prepared from kyanite, sodium tripolyphosphate, organic fiber, 446# heat-resistant stainless steel fiber and the like, and adding Al3O2%，60‑70%、SiO220 to 25 percent of C, 2 to 5 percent of C, and the volume density of 2.0 to 2.5g/cm3The normal-temperature compressive strength is 30-40Mpa, the aluminum-carbon ladle edge material produced by the method optimizes the high-temperature performance index of the product, effectively solves the problems of low product strength, poor anti-scouring capability and the like, is used for smelting steel ladles and molten iron ladle edges of molten steel, is used for sealing and fixing ladle body lining refractory materials, resists molten steel scouring and molten slag erosion, has better slag erosion resistance and scouring resistance than similar products, realizes the recycling of waste refractory hot blast stove balls and stopper turning materials, changes waste into valuable, saves energy, protects environment and has obvious economic benefit.
Description
Technical Field
The invention belongs to the field of refractory materials, relates to a method for recycling and reprocessing waste materials, and particularly relates to a method for producing an aluminum-carbon coated material by adopting waste hot blast stove balls and introducing a recycling stopper.
Background
At present, the turning material of the stopper rod 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 hot blast stove ball is mainly produced by the overhaul of a blast furnace hot blast stove, the used hot blast stove ball is mainly an old hot blast stove ball which is replaced when the blast furnace is overhauled, and the hot blast stove ball is mainly used for storing heat of the blast furnace hot blast stove. The aluminum-carbon ladle edge material is widely applied to the ladle edges of steel ladles and foundry ladles for smelting molten steel, is used for sealing and fixing the ladle body lining refractory materials, is easy to be washed by the molten steel and corroded by molten slag, is mainly produced by high bauxite, flint clay and the like for a long time, has poor self-flowing property and slag corrosion resistance, and has short service cycle and high cost. The stopper turning material and the waste hot blast furnace balls produced by the existing steel mill are all treated as industrial garbage, so that resource waste and environmental pollution are caused.
Disclosure of Invention
In order to solve the problems in the prior art, recycle the waste materials, save resources, save energy and protect environment, the invention provides a method for producing a high-performance aluminum-carbon coated rim material by adopting waste hot blast stove balls and introducing a recycling stopper rod.
The technical scheme adopted by the invention is as follows: a method for producing aluminum-carbon coated rim material by adopting waste hot blast furnace balls and introducing a recovery stopper rod comprises the following steps:
step (1), firstly, manually sorting the recovered waste hot blast stove balls, removing surface impurities, sequentially crushing by a jaw crusher and a cone crusher, removing iron in the crushing process, then screening after Raymond mill powder to obtain waste hot blast stove balls with the particle sizes of 5-8mm, 8-15mm and 200 meshes for later use;
step (2) removing false particles among aggregates from the recycled stopper turning material by adopting wheel milling, and screening the stopper turning material through a secondary screen to obtain the stopper turning material with the particle size of 0.1-1mm, wherein the particle size distribution is that 0.5-1mm accounts for 50-60%, and the particle size distribution is that less than or equal to 0.5mm accounts for 40-50%;
step (3), premixing powder: adding the processed stopper turning material with the diameter of 0.1-1mm, silicon carbide, alumina superfine powder and silica fume according to the proportion, premixing for 15-20min in advance to ensure that the stopper turning material is fully wrapped by the powder, and bagging the premixed powder for later use;
the weight percentage is as follows:
0.1-1mm of waste stopper rod and 40-45 percent of waste stopper rod
Silicon carbide 200 meshes 15-20%
5 mu 25 to 30 percent of aluminum oxide superfine powder
10 to 20 percent of silica fume
Step (4), adding the hot blast furnace ball aggregate, the high bauxite aggregate, the hot blast furnace ball powder and the kyanite powder into a stirrer according to the proportion, dry-mixing for 1-2 minutes, adding the mixed powder produced in the step (3), stirring for 3-5 minutes, gradually adding the 446# heat-resistant stainless steel fiber in the stirring process, uniformly stirring, and then filling into a charging bucket;
the components are added according to the mixture ratio in percentage by weight:
15-20% of waste hot blast stove balls with the diameter of 8-15mm
20-30% of waste hot blast stove balls with the diameter of 5-8mm
10-15% of high-alumina bauxite aggregate with the grain size of 1-5mm
200 meshes of kyanite powder 5-10%
200-mesh waste hot-blast stove balls 5-10%
20 to 25 percent of mixed powder produced in the step (3)
3 to 5 percent of CA-71 cement
Sodium tripolyphosphate accounting for 0.2 percent of the total mass is additionally added; 0.1% of organic fibers; 0.8% 446# heat resistant stainless steel fiber.
The recycled stopper rod turning material comprises the following components in percentage by mass: al (Al)2O365-70% of C, 20-25% of MgO and the balance of MgO.
The waste hot blast stove ball comprises the following components in percentage by mass: al (Al)2O365-70 percent of SiO for the rest2。
And (3) carrying out chemical inspection on the recycled waste hot blast furnace balls and stopper turning materials in the steps (1) and (2) in each batch, meeting the use standard requirements, and determining the proportion of the products in the steps (3) and (4) according to physical and chemical indexes.
In the step (2), when in wheel milling, the bottom plate and the milling wheel of the wheel mill are corrugated.
In the step (3), the silicon carbide powder is 92 silicon carbide powder.
In the steps (3) and (4), the error of the material with the addition amount 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 less than 50kg is not more than 0.05%.
The cement is CA-71 cement.
The invention adopts waste hot blast furnace balls and introduces a recovery stopper rod to produce aluminum-carbon ladle edge materials for ladles and iron ladle edges.
Compared with the prior art, the invention has the advantages that:
1. the invention recycles waste hot blast furnace balls, introduces a combined system of stopper rod turning material waste and alumina superfine powder ultra-low cement, and adds aluminum prepared by kyanite, sodium tripolyphosphate, organic fiber, 446# heat-resistant stainless steel fiber and the likeCarbon cladding material, Al2O3 %，60-70%、SiO220 to 25 percent of C, 2 to 5 percent of C, and the volume density of 2.0 to 2.5g/cm3The normal temperature compressive strength is 30-40Mpa, the aluminum-carbon cladding material produced by the method optimizes the high temperature performance index of the product, and effectively solves the problems of low strength, poor anti-scouring capability and the like of the product. The ladle and the ladle edge for smelting molten steel are used for sealing and fixing the refractory material of the ladle body lining, can resist molten steel scouring and slag erosion, have better slag erosion resistance and scouring resistance than similar products, realize the recycling of waste refractory material hot blast stove balls and stopper rod turning materials, change waste into valuable, save energy, protect environment and have remarkable economic benefit.
2. In the step (1), the hot blast stove ball adopts conical crushing to ensure the roundness of crushed particles and improve the fluidity of the ladle edge material construction.
3. In the step (2), the bottom plate and the grinding wheel of the wheel mill are processed into the corrugated shape, so that the friction force between the grinding wheel and the floor is increased, and the false grains of the turning material of the stopper rod and the removal of slag ash content can be effectively eliminated through the improved wheel mill processing and screening, so that the quality of the turning material of the stopper rod is ensured.
4. In the step (2), the recycled stopper turning material contains graphite and aluminum-rich spinel, the in-situ graphite and the aluminum-rich spinel are introduced through the stopper turning material, the graphite is not easy to wet by molten steel and slag, the thermal expansion coefficient is small, and the aluminum-rich spinel has good erosion resistance of molten steel refining slag and is introduced into a refractory material aluminum carbon ladle edge material, so that the erosion resistance and permeability of the prepared aluminum carbon ladle edge material to the molten steel refining slag are effectively improved, and the slag erosion resistance and thermal stability of the aluminum carbon ladle edge material are obviously improved.
5. In the step (3), the alumina superfine powder and the silica fume are simultaneously introduced into the edge covering material, so that the flowability of the material is enhanced, the problem of large water addition amount caused by recycling high-alumina aggregate is solved, and the volume density of the product is indirectly improved; by introducing the alumina ultrafine powder and adopting a premixing technology, the ultrafine powder is fully attached to the surfaces of the turning material particles of the stopper rod in the premixing process, and the introduction of graphite in the aluminum-carbon coated material is effectively protected.
6. In the step (3), the silicon carbide is added, so that oxidation of graphite in the waste stopper rod in the baking use process is effectively prevented, carbon is effectively protected, and the slag corrosion resistance of the product is indirectly improved.
7. In the step (4), the high-performance cement CA-71 is introduced, so that the high-temperature strength use performance of the product is effectively improved, and the anti-scouring capability of the product is enhanced.
8. In the step (4), the volume shrinkage caused by the high-temperature sintering process of the waste high-alumina balls is eliminated by introducing the kyanite, so that the generation of cracks in the using process is reduced.
9. The aluminum-carbon edge material produced by the method can be applied to steel ladles and iron ladles, so that waste materials can be recycled, the aluminum-carbon edge material is produced by a recycling technology, and the product meets the national development requirement of environmental protection and has good popularization prospect.
Detailed Description
The method for producing the aluminum-carbon coated material product according with the standard by using the waste hot-blast stove balls and the waste stopper turning materials as raw materials is explained in detail with reference to specific embodiments.
Example 1
A method for producing aluminum-carbon coated materials by adopting waste hot blast stove balls and introducing recycling stopper rods, the produced products meet the requirements of molten steel scouring resistance, molten slag erosion resistance and other service performances, and the specific production process comprises the following steps:
step (1), firstly, manually sorting recycled waste hot blast stove balls, removing surface impurities, crushing by a jaw crusher and a cone crusher, screening Raymond mill powder by a screen, and removing iron in the processing and crushing process to obtain materials with the particle sizes of 5-8mm, 8-15mm and 200 meshes;
step (2) turning the recycled stopper rod, grinding the stopper rod turning material wheel to eliminate false particles among aggregates, and screening the stopper rod turning material wheel through a secondary screen to obtain stopper rod particles with the particle size of 0.1-1mm, wherein the particle size distribution is that the particle size of 0.5-1mm accounts for 50-60%, and the particle size distribution of less than or equal to 0.5mm accounts for 40-50%;
performing physical and chemical index analysis on the recovered waste hot blast stove ball particles and the stopper turning material, and determining the proportion of the products in the steps (3) and (4) according to the physical and chemical indexes; the physical and chemical indexes are as follows: the weight percentages are as follows:
TABLE 1 analysis of physical and chemical indexes after treatment of the recycled waste
Step (3), premixing powder: pre-mixing the processed stopper turning material with the diameter of 0.1-1mm, 92 silicon carbide, 5 mu aluminum oxide superfine powder and silica fume in advance according to a certain proportion, and pre-mixing for 15-20min by a pre-mixer to ensure that the stopper turning material is fully wrapped by the powder, and bagging the pre-mixed powder for later use;
the weight percentage is as follows:
0.1-1mm of waste stopper rod and 40 percent of waste stopper rod
200 meshes and 20 percent of silicon carbide
30 percent of 5 mu aluminum oxide superfine powder
10 percent of silica fume
And (4) adding the hot blast furnace ball aggregate, 70 high-alumina bauxite aggregate, hot blast furnace ball powder and kyanite powder into a stirrer, dry-mixing for 1-2 minutes, adding the mixed powder obtained in the step (3), stirring for 3-5 minutes, gradually dispersing and gradually adding 446# heat-resistant stainless steel fiber, sodium tripolyphosphate and organic fiber in the stirring process, and filling into a charging bucket and putting into a finished product warehouse after the materials are stirred to be qualified.
The additive is added according to the following mixture ratio by weight percent:
20 percent of waste hot blast stove balls with the diameter of 8-15mm
Waste hot blast stove balls with the diameter of 5-8mm 30 percent
10 percent of high-alumina bauxite aggregate with the grain size of 1-5mm70
200 meshes of Lanjinshi powder 7%
200 meshes of waste hot blast stove balls 5%
25 percent of mixed powder produced in the step (3)
CA-71 cement 3%
The sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber are additionally added, wherein the sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber account for 0.2% of the total mass, and the 446# heat-resistant stainless steel fiber accounts for 0.8% of the total mass.
The error of the materials with the addition amount of more than 100kg is not more than 1 percent, the error of the materials with the addition amount of 50-100kg is not more than 0.5 percent, and the error of the materials with the addition amount of less than 50kg is not more than 0.05 percent; the net weight of each bag is 25 plus or minus 0.25kg, and the storage period is not more than 3 months.
TABLE 2. produced aluminum-carbon coating
And (5): the construction method of the aluminum-carbon edge material for the steel ladle edge comprises the following steps: firstly, checking and confirming that a packaging bag mark of a castable (aluminum-carbon edge material) is clear, the castable is dry and has no sundries, aggregate and powder in the castable are uniformly mixed, then starting a stirrer to run for 1-2 minutes, confirming that the stirrer runs normally, then blanking according to the rated power of a knotter, firstly, carrying out dry stirring for 1-2 minutes after blanking, adding water for stirring for 1-3 minutes, and adding the water according to 7 +/-1% of the total mass of the castable; after the materials are uniformly stirred, starting a rotary distributor to feed the materials, ensuring uniform feeding, starting vibration after the materials are distributed, stirring and vibrating simultaneously in the process, constructing the materials in an M form by a vibrating rod during vibration, slightly returning slurry to the materials, discharging bubbles and stopping stirring; the steel ladle free space is naturally maintained, the maintenance time in summer is not less than 4 hours, the maintenance time in winter is not less than 6 hours, then the steel wire or the steel bar is used for pricking the castable, the steel bar is removed when the depth of the poured material which is pricked into the castable is less than 50mm, the crane is used for slowly and vertically hoisting, the castable is prevented from being pulled off, and the ladle edge material baking process is consistent with the baking of the whole refractory material of the steel ladle.
The aluminum-carbon edge material is used for testing the slag and molten steel corrosion resistance of the product after the edge of the steel ladle is covered, the performance is excellent, the field use requirement is met, compared with the existing edge material, the cost is reduced by 65%, and the obvious benefit is brought to enterprises.
Example 2
A method for producing aluminum-carbon coated materials by adopting waste hot blast stove balls and introducing recycling stopper rods, the produced products meet the requirements of molten steel scouring resistance, molten slag erosion resistance and other service performances, and the specific production process comprises the following steps:
step (1), firstly, manually sorting recycled waste hot blast stove balls, removing surface impurities, crushing by a jaw crusher and a cone crusher, screening Raymond mill powder by a screen, and removing iron in the processing and crushing process to obtain materials with the particle sizes of 5-8mm, 8-15mm and 200 meshes;
step (2) turning the recycled stopper rod, grinding the stopper rod turning material wheel to eliminate false particles among aggregates, and screening the stopper rod turning material wheel through a secondary screen to obtain stopper rod particles with the particle size of 0.1-1mm, wherein the particle size distribution is that the particle size of 0.5-1mm accounts for 50-60%, and the particle size distribution of less than or equal to 0.5mm accounts for 40-50%;
performing physical and chemical index analysis on the recovered waste hot blast stove ball particles and the stopper turning material, and determining the proportion of the products in the steps (3) and (4) according to the physical and chemical indexes; the physical and chemical indexes are as follows: the weight percentages are as follows:
TABLE 3 analysis of physicochemical indexes of treated recycled wastes
Step (3), premixing powder: pre-mixing the processed 0.1-1mm stopper rod turning material, 92 silicon carbide, alumina superfine powder, silica fume, tripolymer (addition) and organic fiber (addition) according to a certain proportion in advance, pre-mixing for 15-20min by a pre-mixer to ensure that the stopper rod turning material is fully wrapped by powder, and bagging the pre-mixed powder for later use;
the weight percentage is as follows:
0.1-1mm 45% of waste stopper rod
Silicon carbide 200 meshes and 15%
5 mu alumina submicron powder 25%
15 percent of silica fume
And (4) adding the hot blast furnace ball aggregate, 70 high-alumina bauxite aggregate, hot blast furnace ball powder and kyanite powder into a stirrer, dry-mixing for 1-2 minutes, adding the mixed powder obtained in the step (3), stirring for 3-5 minutes, gradually dispersing and gradually adding 446# heat-resistant stainless steel fiber, sodium tripolyphosphate and organic fiber in the stirring process, and filling into a charging bucket and putting into a finished product warehouse after the materials are stirred to be qualified.
The additive is added according to the following mixture ratio by weight percent:
waste hot blast stove balls of 8-15mm 15%
20 percent of waste hot blast furnace ball with the diameter of 5-8mm
15 percent of high-alumina bauxite aggregate with the grain size of 1-5mm70
10 percent of 200-mesh cyanite powder
200 meshes of waste hot blast stove ball 10%
25 percent of mixed powder produced in the step (3)
CA-71 cement 5%
The sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber are additionally added, wherein the sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber account for 0.2% of the total mass, and the 446# heat-resistant stainless steel fiber accounts for 0.8% of the total mass.
The error of the materials with the addition amount of more than 100kg is not more than 1 percent, the error of the materials with the addition amount of 50-100kg is not more than 0.5 percent, and the error of the materials with the addition amount of less than 50kg is not more than 0.05 percent; the net weight of each bag is 25 plus or minus 0.25kg, and the storage period is not more than 3 months.
TABLE 4. produced aluminum-carbon coating
And (5): the construction method of the aluminum-carbon edge material for the steel ladle edge comprises the following steps: firstly, checking and confirming that the mark of a castable packaging bag is clear, the castable is dry and has no impurities, and aggregate and powder in the castable are uniformly mixed, then starting a stirrer to run for 1-2 minutes, after confirming that the stirrer runs normally, blanking according to the rated power of a knot tying machine, firstly, carrying out dry stirring for 1-2 minutes, then, adding water, stirring for 1-3 minutes, and adding water for 7 +/-1 percent; after the materials are uniformly stirred, starting a rotary distributor to feed the materials, ensuring uniform feeding, starting vibration after the materials are distributed, stirring and vibrating simultaneously in the process, constructing the materials in an M form by a vibrating rod during vibration, slightly returning slurry to the materials, discharging bubbles and stopping stirring; naturally curing the steel ladle in a free space, wherein the curing time is not less than 4 hours in summer, the curing time is not less than 6 hours in winter, then an iron wire or a steel bar is used for pricking the castable, when the depth of the steel bar which is pricked into the castable is less than 50mm, the steel bar is removed, and a crown block is used for slowly and vertically lifting to prevent the castable from being pulled out; and (5) enabling the baking process curve of the ladle edge material to be consistent with the baking process curve of the integral refractory material of the ladle.
The aluminum-carbon ladle edge material is used for testing the slag and molten steel corrosion resistance of products after the ladle edge, has excellent performance, meets the field use requirement, reduces the cost by 68 percent compared with the existing ladle edge raw material, and brings remarkable benefit to enterprises.
Example 3
A method for producing aluminum-carbon coated materials by adopting waste hot blast stove balls and introducing recycling stopper rods, the produced products meet the requirements of molten steel scouring resistance, molten slag erosion resistance and other service performances, and the specific production process comprises the following steps:
step (1), firstly, manually sorting recycled waste hot blast stove balls, removing surface impurities, crushing by a jaw crusher and a cone crusher, screening Raymond mill powder by a screen, and removing iron in the processing and crushing process to obtain materials with the particle sizes of 5-8mm, 8-15mm and 200 meshes;
step (2) turning the recycled stopper rod, grinding the stopper rod turning material wheel to eliminate false particles among aggregates, and screening the stopper rod turning material wheel through a secondary screen to obtain stopper rod particles with the particle size of 0.1-1mm, wherein the particle size distribution is that the particle size of 0.5-1mm accounts for 50-60%, and the particle size distribution of less than or equal to 0.5mm accounts for 40-50%;
performing physical and chemical index analysis on the recovered waste hot blast stove ball particles and the stopper turning material, and determining the proportion of the products in the steps (3) and (4) according to the physical and chemical indexes; the physical and chemical indexes are as follows: the weight percentages are as follows:
TABLE 5 analysis of physical and chemical indexes after treatment of the recycled waste
Step (3), premixing powder: pre-mixing the processed 0.1-1mm stopper rod turning material, 92 silicon carbide, alumina superfine powder, silica fume, tripolymer (addition) and organic fiber (addition) according to a certain proportion in advance, pre-mixing for 15-20min by a pre-mixer to ensure that the stopper rod turning material is fully wrapped by powder, and bagging the pre-mixed powder for later use;
the weight percentage is as follows:
0.1-1mm of waste stopper rod and 40 percent of waste stopper rod
Silicon carbide 200 meshes and 16 percent
24 percent of 5 mu alumina submicron powder
20 percent of silica fume
And (4) adding the hot blast furnace ball aggregate, 70 high-alumina bauxite aggregate, hot blast furnace ball powder and kyanite powder into a stirrer, dry-mixing for 1-2 minutes, adding the mixed powder obtained in the step (3), stirring for 3-5 minutes, gradually dispersing and gradually adding 446# heat-resistant stainless steel fiber, sodium tripolyphosphate and organic fiber in the stirring process, and filling into a charging bucket and putting into a finished product warehouse after the materials are stirred to be qualified.
The additive is added according to the following mixture ratio by weight percent:
17 percent of waste hot blast stove balls with the diameter of 8-15mm
27 percent of waste hot blast furnace ball with the diameter of 5-8mm
13 percent of high-alumina bauxite aggregate with the grain size of 1-5mm70
200 meshes of kyanite powder 6%
200 meshes of waste hot blast stove ball 9%
25 percent of mixed powder produced in the step (3)
CA-71 cement 3%
The sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber are additionally added, wherein the sodium tripolyphosphate, the organic fiber and the 446# heat-resistant stainless steel fiber account for 0.2% of the total mass, and the 446# heat-resistant stainless steel fiber accounts for 0.8% of the total mass.
The error of the materials with the addition amount of more than 100kg is not more than 1 percent, the error of the materials with the addition amount of 50-100kg is not more than 0.5 percent, and the error of the materials with the addition amount of less than 50kg is not more than 0.05 percent; the net weight of each bag is 25 plus or minus 0.25kg, and the storage period is not more than 3 months.
TABLE 6 produced aluminum-carbon coating
And (5): the ladle edge construction method of the aluminum-carbon ladle edge material on-site ladle comprises the following steps: firstly, checking and confirming that the mark of a castable packaging bag is clear, the castable is dry and has no impurities, and aggregate and powder in the castable are uniformly mixed, then starting a stirrer to run for 1-2 minutes, after confirming that the stirrer runs normally, blanking according to the rated power of a knot tying machine, firstly, carrying out dry stirring for 1-2 minutes, then, adding water, stirring for 1-3 minutes, and adding water for 7 +/-1 percent; after the materials are uniformly stirred, starting a rotary distributor to feed the materials, ensuring uniform feeding, starting vibration after the materials are distributed, stirring and vibrating simultaneously in the process, constructing the materials in an M form by a vibrating rod during vibration, slightly returning slurry to the materials, discharging bubbles and stopping stirring; naturally curing the steel ladle in a free space, wherein the curing time is not less than 4 hours in summer, the curing time is not less than 6 hours in winter, then an iron wire or a steel bar is used for pricking the castable, when the depth of the steel bar which is pricked into the castable is less than 50mm, the steel bar is removed, and a crown block is used for slowly and vertically lifting to prevent the castable from being pulled out; and (5) enabling the baking process curve of the ladle edge material to be consistent with the baking process curve of the integral refractory material of the ladle.
The aluminum-carbon edge material is used for testing the slag and molten steel corrosion resistance of the product after the edge of the steel ladle is covered, has excellent performance, meets the field use requirement, reduces the cost by 70 percent compared with the existing edge material, and brings remarkable benefit to enterprises.
Claims (8)
1. A method for producing aluminum-carbon coated rim material by adopting waste hot blast furnace balls and introducing a recovery stopper rod is characterized by comprising the following steps: the method specifically comprises the following steps:
step (1), firstly, manually sorting the recovered waste hot blast stove balls, removing surface impurities, sequentially crushing by a jaw crusher and a cone crusher, removing iron in the crushing process, then screening after Raymond mill powder to obtain waste hot blast stove balls with the particle sizes of 5-8mm, 8-15mm and 200 meshes for later use;
step (2) removing false particles among aggregates from the recycled stopper turning material by adopting wheel milling, and screening the stopper turning material through a secondary screen to obtain the stopper turning material with the particle size of 0.1-1mm, wherein the particle size distribution is that 0.5-1mm accounts for 50-60%, and the particle size distribution is that less than or equal to 0.5mm accounts for 40-50%;
step (3), premixing powder: adding the processed stopper turning material with the diameter of 0.1-1mm, silicon carbide, alumina superfine powder and silica fume according to the proportion, premixing for 15-20min in advance to ensure that the stopper turning material is fully wrapped by the powder, and bagging the premixed powder for later use;
the weight percentage is as follows:
0.1-1mm of waste stopper rod and 40-45 percent of waste stopper rod
Silicon carbide 200 meshes 15-20%
5 mu 25 to 30 percent of aluminum oxide superfine powder
10 to 20 percent of silica fume
Step (4), adding the hot blast furnace ball aggregate, the high bauxite aggregate, the hot blast furnace ball powder and the kyanite powder into a stirrer according to the proportion, dry-mixing for 1-2 minutes, adding the premixed powder produced in the step (3), stirring for 3-5 minutes, gradually adding the 446# heat-resistant stainless steel fiber, the sodium tripolyphosphate and the organic fiber in the stirring process, uniformly stirring, and then filling into a charging bucket;
the components are added according to the mixture ratio in percentage by weight:
15-20% of waste hot blast stove balls with the diameter of 8-15mm
20-30% of waste hot blast stove balls with the diameter of 5-8mm
10-15% of high-alumina bauxite aggregate with the grain size of 1-5mm
200 meshes of kyanite powder 5-10%
200-mesh waste hot-blast stove balls 5-10%
20 to 25 percent of mixed powder produced in the step (3)
3 to 5 percent of CA-71 cement
Sodium tripolyphosphate accounting for 0.2 percent of the total mass is additionally added; 0.1% of organic fibers; 0.8% 446# heat resistant stainless steel fiber.
2. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to claim 1 is characterized in that: the recycled stopper rod turning material comprises the following components in percentage by mass: al (Al)2O365-70% of C, 20-25% of MgO and the balance of MgO.
3. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to the claim 2 is characterized in that: the waste hot blast stove ball comprises the following components in percentage by mass: al (Al)3O265-70 percent of SiO for the rest2。
4. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to claim 3 is characterized in that: and (3) carrying out chemical inspection on the recycled waste hot blast furnace balls and stopper turning materials in the steps (1) and (2) in each batch, meeting the use standard requirements, and determining the proportion of the products in the steps (3) and (4) according to physical and chemical indexes.
5. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to any one of claims 1 to 4, is characterized in that: in the step (2), when in wheel milling, the bottom plate and the milling wheel of the wheel mill are corrugated.
6. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to claim 5 is characterized in that: in the step (3), the silicon carbide powder is 92 silicon carbide powder.
7. The method for producing the aluminum-carbon coated rim charge by adopting the waste hot blast stove balls and introducing the recovery stopper rods according to the claim 1 or 6, is characterized in that: in the steps (3) and (4), the error of the material with the addition amount 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 less than 50kg is not more than 0.05%.
8. Use of an aluminium-carbon coating produced according to the method of claim 7, wherein: the steel ladle edge bead is used for steel ladles and iron ladles.
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| CN201811192143.1A CN109336621B (en) | 2018-10-12 | 2018-10-12 | Method for producing aluminum-carbon coated rim material by adopting waste hot-blast stove balls and introducing recycling stopper rods |
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| US7811379B2 (en) * | 2006-05-16 | 2010-10-12 | Harsco Corporation | Regenerated calcium aluminate product and process of manufacture |
| CN103304246A (en) * | 2013-05-27 | 2013-09-18 | 德清县钢友耐火材料有限公司 | Regenerative type low-carbon corundum spinel impacting plate and preparation method thereof |
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