CN115700233A - Early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash and method - Google Patents
Early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash and method Download PDFInfo
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Abstract
The invention discloses an early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash and a method; the early-strength rapid-hardening high-performance refractory castable comprises a dry-mixed material and a liquid excitant; the dry mixing material comprises the following components in percentage by mass: 30-80 wt% of secondary aluminum ash aggregate; 1-15 wt% of secondary aluminum ash fine powder; 1-20 wt% of alumina micro powder; 1-20 wt% of silicon micropowder; 1-20 wt% of composite additive; 1-20 wt% of cross-linking agent and 0.01-10 wt% of water reducing agent; the liquid excitant accounts for 5 to 50 percent of the weight of the dry mixing material. The method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash disclosed by the invention adopts the secondary aluminum ash as a main raw material, and because of the special structural property of the secondary aluminum ash, the secondary aluminum ash aggregate prepared by granulation and sintering has the characteristics of more pores and high strength, so that when the aggregate is used as the aggregate of the castable, powder, a liquid excitant and the like can permeate into the gaps of the aggregate, and the strength and the overall performance of the castable are greatly improved.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to an early-strength quick-hardening high-performance refractory castable prepared from secondary aluminum ash and a method for preparing the early-strength quick-hardening high-performance refractory castable by using the secondary aluminum ash.
Background
The aluminum ash is a general name of products obtained by cooling slag generated in the production process of electrolytic aluminum, cast aluminum and secondary aluminum. In the national records of hazardous waste issued in 2021, the aluminum ash produced in the processing of recycled aluminum and aluminum materials and the secondary aluminum ash produced in the aluminum recovery process are listed as hazardous solid wastes (HW 48). Along with the continuous enlargement of the industrial production scale of aluminum in China, the yield of aluminum is continuously improved, and the production amount of aluminum ash is also continuously increased. At present, most production enterprises only recycle primary aluminum ash with high metal aluminum content, and the aluminum slag, secondary aluminum ash and the like remained after the recovery are continuously recycled due to the fact that the metal aluminum content is low and the aluminum mainly exists in the form of aluminum oxide, high recovery rate and economic benefit are difficult to achieve, and the aluminum is accumulated or buried in a landfill mode, so that not only is the aluminum resource wasted, but also the surrounding environment is seriously polluted.
At present, the resource utilization approaches of secondary aluminous ash mainly comprise: metallic aluminium or Al 2 O 3 The extraction of the material, the synthesis of cryolite and magnesia-alumina spinel, the casting material, alumina-based ceramics, refractory bricks, concrete and the like. The casting material prepared from the secondary aluminum ash is mainly a building material, in such applications, the usage amount of the aluminum ash is small, the utilization rate is relatively low, the secondary aluminum ash is only used as a small amount of ingredients of casting material powder, and the advantages of high alumina content, more pores, good high temperature resistance and the like of the secondary aluminum ash as main raw materials are not fully exerted.
Disclosure of Invention
The invention aims to provide an early strength and quick hardening type high-performance refractory castable prepared by using secondary aluminum ash and a method for preparing the early strength and quick hardening type high-performance refractory castable by using the secondary aluminum ash, and the early strength and quick hardening type high-performance refractory castable provided by the invention has the advantages of high early strength, quick setting time, good metal solution corrosion resistance and the like, so that the early strength and quick hardening type high-performance refractory castable can be used as a quick repairing material for cracks, pot holes and the like of an industrial kiln lining, and the service life of the castable is prolonged by repairing.
The invention is realized by the following technical scheme:
the early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash is characterized by comprising a dry-mixed material and a liquid activator; the dry mixing material comprises the following components in percentage by mass: 30-80 wt% of secondary aluminum ash aggregate; 1-15 wt% of secondary aluminum ash fine powder; 1-20 wt% of alumina micro powder; 1-20 wt% of silicon micro powder; 1-20 wt% of composite additive; 1-20 wt% of cross-linking agent and 0.01-10 wt% of water reducing agent; the liquid excitant accounts for 5 to 50 percent of the weight of the dry mixing material.
Specifically, the cross-linking agent is selected from one or a mixture of polyvinyl alcohol, resin, arabic gum, carboxymethyl cellulose, citric acid, citrate, alginate, methyl cellulose, bentonite, clay, dihydric alcohol, polyalcohol and resin.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the liquid excitant is one or a mixture of a plurality of water, silica sol, alumina sol, water glass, phosphoric acid, sodium phosphate, sodium dihydrogen phosphate, sodium monohydrogen phosphate, ammonium dihydrogen phosphate and borax in any proportion.
Further, an early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash: the secondary aluminum ash aggregate comprises the following components in percentage by mass: 35-80 wt% of secondary aluminum ash, 15-60 wt% of auxiliary material and 0.1-5 wt% of cross-linking agent; the secondary aluminum ash is formed by extracting aluminum from aluminum ash generated in the casting process, and the main chemical components of the secondary aluminum ash comprise the following components in percentage by mass: al:0 to 10 weight percent; al (Al) 2 O 3 ：30～60wt％；Fe 2 O 3 Less than or equal to 3 weight percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%, and the particle size of the secondary aluminum ash is 0.1-10 mm; the auxiliary material is one or a mixture of more of kaolin, bauxite, mullite and corundum; the cross-linking agent is selected from polyvinyl alcohol, resin, acacia, carboxymethyl cellulose, citric acid, citrate, and alginic acidOne or more of salt, methylcellulose, bentonite, clay, dihydric alcohol, polyalcohol and resin.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the secondary aluminum ash fine powder is prepared by performing ball milling, drying and sieving treatment on secondary aluminum ash; the main chemical components of the material comprise the following components in percentage by mass: al (Al) 2 O 3 ≥60wt％；Fe 2 O 3 Less than or equal to 3 weight percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%; the grain diameter of the secondary aluminum ash fine powder is 5-75 mu m.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the alumina micro powder is a mixture of one or more than one of alumina with the content of more than or equal to 90 percent and the grain diameter of less than or equal to 10mm in any proportion.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the silicon micropowder is a mixture of one or more of silicon oxide with the content of more than or equal to 80 percent and the grain diameter of less than or equal to 100 mu m in any proportion.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the composite additive is selected from one or a mixture of more of barium sulfate, strontium sulfate, cerium oxide, magnesium oxide, calcium fluoride, aluminum phosphate, magnesium phosphate, silicon nitride, boron nitride, silicon carbide, boron carbide, kyanite, aluminum titanate, calcium aluminate, calcium silicate, andalusite, sillimanite, high silica alumina sol, hydrated alumina micropowder, silica alumina sol powder and aluminate cement in any proportion.
Further, an early-strength fast-hardening high-performance refractory castable prepared from secondary aluminum ash: the water reducing agent is selected from one or a mixture of a plurality of polyphosphate, metaphosphate, polycarboxylic acid, lignin water reducing agent, naphthalene water reducing agent or dispersed alumina high-efficiency water reducing agent in any proportion.
The method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash is characterized by comprising the following steps of:
s1, weighing secondary aluminum ash, auxiliary materials and a cross-linking agent according to the component proportion of the secondary aluminum ash aggregate, and putting the secondary aluminum ash, the auxiliary materials and the cross-linking agent into a high-speed stirrer to be uniformly mixed to prepare a mixed material for later use;
s2, standing the mixed material for ageing for 6-8 hours at the temperature of 25-50 ℃ and the humidity of 30-90%;
s3, dry-pressing and granulating the mixed material processed in the step S2 to obtain a green body;
s4, naturally drying the green body for 12-24 hours at the temperature of 25-50 ℃ and the humidity of 30-70%, then drying for 6-8 hours at the temperature of 100-110 ℃, and sintering for 2-24 hours at the temperature of 800-1600 ℃ to prepare the secondary aluminum ash aggregate for later use;
s5, placing the prepared secondary aluminum ash aggregate into a ball mill for ball milling for 0.5-48 hours, drying for 10 minutes-72 hours at 35-110 ℃ after ball milling, and sieving to obtain fine powder with the sieve mesh number of 100-500 meshes to obtain secondary aluminum ash fine powder;
s6, weighing secondary aluminum ash aggregate, secondary aluminum ash fine powder, alumina micro powder, silicon micro powder, a composite additive, a cross-linking agent and a water reducing agent according to the component proportion of the dry mixed material, and uniformly mixing the materials in a mixer to obtain the dry mixed material;
and S7, uniformly mixing the dry stirring material and the liquid excitant in proportion to obtain the early-strength quick-hardening high-performance refractory castable.
Further, the method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash comprises the following steps: the ball milling process in the step S5 is dry milling or wet milling by taking alcohol as an auxiliary agent; the use of the casting material: the early strength fast hardening high performance refractory castable is coated or cast on a use position, maintained for 6 to 24 hours at room temperature, dried for 20 to 30 hours at the temperature of 100 to 200 ℃, and roasted for 2 to 8 hours at the temperature of 1000 to 1300 ℃.
The invention has the beneficial effects that:
(1) The early-strength fast-hardening high-performance refractory castable prepared by using the secondary aluminum ash provided by the invention takes the secondary aluminum ash as a main raw material, and compared with the traditional method for preparing materials by using the original aluminum ash, the method provided by the invention does not need desalting and denitrogenating treatment processes, has more stable performance, more environment-friendly preparation process and simpler process.
(2) The method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash provided by the invention adopts the secondary aluminum ash as a main raw material, and the secondary aluminum ash aggregate prepared by granulation and sintering has the characteristics of more pores and high strength due to the special structural property of the secondary aluminum ash, so that powder, liquid excitant and the like can permeate into the gaps of the aggregate when the aggregate is used as the aggregate of the castable, and the strength and the overall performance of the castable are greatly improved.
(3) In the method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash, the secondary aluminum ash fine powder is used, and the special properties of the secondary aluminum ash are utilized, so that the porosity is high, the reaction activity is high, the reaction between the prepared castable dry-mixed material and the liquid excitant is more sufficient, and the strength and the overall performance of the castable are further improved.
(4) The method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash provided by the invention adopts the secondary aluminum ash as a main raw material, and is an energy-saving and environment-friendly preparation method with low production cost.
(5) In the method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash, provided by the invention, the secondary aluminum ash aggregate and the fine powder are prepared by using the processes of dry-pressing granulation, sintering, ball milling and the like, on one hand, the aggregate has controllable strength, on the other hand, the aggregate and the fine powder have the same source, and the overall strength of the castable can be improved after casting and molding.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example 1
The early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash is characterized by comprising a dry-mixed material and a liquid excitant; the dry mixing material comprises the following components in percentage by mass: 30wt% of secondary aluminum ash aggregate; 10wt% of secondary aluminum ash fine powder; 20wt% of alumina micro powder; 10wt% of silicon micro powder; 15wt% of composite additive; 10wt% of cross-linking agent and 5wt% of water reducing agent; the liquid excitant accounts for 30% of the weight of the dry mixing material; wherein: the liquid excitant is alumina sol; the secondary aluminum ash aggregate comprises the following components in percentage by mass: 75wt% of secondary aluminum ash (the secondary aluminum ash is the secondary aluminum ash formed by extracting aluminum from aluminum ash generated in the casting process, and the main chemical components of the secondary aluminum ash comprise 0-10 wt% of Al and the mass fraction of Al 2 O 3 ：30～60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%, and the grain diameter of the secondary aluminum ash is 0.1-10 mm; ) 20wt% of auxiliary material (kaolin) and 5wt% of cross-linking agent (polyvinyl alcohol); the secondary aluminum ash fine powder is prepared by performing ball milling, drying and sieving treatment on secondary aluminum ash, and the secondary aluminum ash fine powder comprises the following main chemical components in percentage by mass: al (Al) 2 O 3 ≥60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%; the grain size of the secondary aluminum ash fine powder is distributed between 5 and 75 mu m; the composite additive is barium sulfate; the water reducing agent is polyphosphate.
The method for preparing the early-strength fast-hardening high-performance refractory castable by using the secondary aluminum ash comprises the following specific steps of:
s1, weighing secondary aluminum ash, an auxiliary material (kaolin) and a cross-linking agent (polyvinyl alcohol) according to the component proportion of the secondary aluminum ash aggregate, and then putting the secondary aluminum ash, the auxiliary material (kaolin) and the cross-linking agent (polyvinyl alcohol) into a high-speed stirrer to be uniformly mixed to prepare a mixed material for later use;
s2, standing the mixed material for ageing for 6 hours at the temperature of 25-50 ℃ and the humidity of 30-90%;
s3, dry-pressing and granulating the mixed material processed in the step S2 to obtain a green body;
s4, naturally drying the obtained green body for 15 hours at the temperature of 30 ℃ and the humidity of 50%, then drying for 6 hours at the temperature of 100 ℃, and sintering for 24 hours at the temperature of 800 ℃ to prepare secondary aluminum ash aggregate for later use;
s5, placing the prepared secondary aluminum ash aggregate into a ball mill for ball milling for 8 hours (the ball milling process is dry milling or wet milling by taking alcohol as an auxiliary agent), drying for 2 hours at 100 ℃ after ball milling, and sieving to obtain fine powder with the sieve mesh number of 100-500 to obtain secondary aluminum ash fine powder;
s6, weighing secondary aluminum ash aggregate, secondary aluminum ash fine powder, alumina micro powder, silicon micro powder, a composite additive, a cross-linking agent and a water reducing agent according to the component proportion of the dry mixing material, and uniformly mixing the materials in a mixer to obtain the dry mixing material;
s7, uniformly mixing the obtained dry mixed material and a liquid activator in proportion (the liquid activator accounts for 30% of the weight of the dry mixed material), and obtaining the early-strength quick-hardening high-performance refractory castable; the use of the early-strength quick-hardening high-performance refractory castable comprises the following steps: the early strength fast hardening high performance refractory casting material is coated or cast in the use position, maintained at room temperature for 6-24 hr, dried at 100-200 deg.c for 20-30 hr and roasted at 1000-1300 deg.c for 2-8 hr.
Example 2
The early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash is characterized by comprising a dry-mixed material and a liquid excitant; the dry mixing material comprises the following components in percentage by mass: 80wt% of secondary aluminum ash aggregate; 15wt% of secondary aluminum ash fine powder; 1wt% of alumina micropowder; 1wt% of silicon micropowder; 1wt% of composite additive; 1wt% of a cross-linking agent and 1wt% of a water reducing agent; the liquid excitant accounts for 50% of the weight of the dry mixing material; the liquid excitant is sodium dihydrogen phosphate; the secondary aluminum ash aggregate comprises the following components in percentage by mass: 35wt% of secondary aluminum ash (the secondary aluminum ash is produced by aluminum ash in a fusion casting processThe secondary aluminum ash formed after aluminum extraction of the aluminum ash comprises the following main chemical components in percentage by mass: al:0 to 10 weight percent; al (Al) 2 O 3 ：30～60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%, and the grain diameter of the secondary aluminum ash is 0.1-10 mm; ) 60wt% of auxiliary material (the auxiliary material is mullite) and 5wt% of cross-linking agent (the cross-linking agent is carboxymethyl cellulose); the secondary aluminum ash fine powder is prepared by performing ball milling, drying and sieving treatment on secondary aluminum ash, and the secondary aluminum ash fine powder comprises the following main chemical components in percentage by mass: al (Al) 2 O 3 ≥60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%; the grain size of the secondary aluminum ash fine powder is distributed between 5 and 75 mu m; the composite additive is magnesium oxide, and the water reducing agent is a lignin water reducing agent.
Example 3
The early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash is characterized by comprising a dry-mixed material and a liquid activator; the dry mixing material comprises the following components in percentage by mass: 40wt% of secondary aluminum ash aggregate; 5wt% of secondary aluminum ash fine powder; 10wt% of alumina micro powder; 20wt% of silicon micropowder; 3wt% of composite additive; 12wt% of cross-linking agent and 10wt% of water reducing agent; the liquid excitant accounts for 10% of the weight of the dry mixing material; wherein: the liquid excitant is borax; the secondary aluminum ash aggregate comprises the following components in percentage by mass: 55wt% of secondary aluminum ash (the secondary aluminum ash is formed by extracting aluminum from aluminum ash generated in the casting process, and the main chemical components of the secondary aluminum ash comprise 0-10 wt% of Al and the mass fraction of Al 2 O 3 ：30～60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%, and the grain diameter of the secondary aluminum ash is 0.1-10 mm; ) 44wt% of auxiliary material (the auxiliary material is mullite) and 1wt% of cross-linking agent (the cross-linking agent is resin); the secondary aluminum ash fine powder is prepared by performing ball milling, drying and sieving treatment on secondary aluminum ash, and the secondary aluminum ash fine powder comprises the following main chemical components in percentage by mass: al (aluminum) 2 O 3 ≥60wt％；Fe 2 O 3 ≤3wt%; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%; the grain size of the secondary aluminum ash fine powder is distributed between 5 and 75 mu m; the composite additive is high silica alumina sol; the water reducing agent is a dispersed alumina high-efficiency water reducing agent.
The above-mentioned preferred embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention. Obvious variations or modifications of the present invention are within the scope of the present invention.
Claims (10)
1. The early-strength quick-hardening high-performance refractory castable prepared by using secondary aluminum ash is characterized by comprising a dry-mixed material and a liquid excitant; the dry mixing material comprises the following components in percentage by mass: 30-80 wt% of secondary aluminum ash aggregate; 1-15 wt% of secondary aluminum ash fine powder; 1-20 wt% of alumina micro powder; 1-20 wt% of silicon micropowder; 1-20 wt% of composite additive; 1-20 wt% of cross-linking agent and 0.01-10 wt% of water reducing agent; the liquid excitant accounts for 5 to 50 percent of the weight of the dry mixing material.
2. The early strength and quick hardening type high performance refractory castable material prepared from secondary aluminum ash according to claim 1, wherein the liquid activator is one or a mixture of several of water, silica sol, alumina sol, water glass, phosphoric acid, sodium phosphate, sodium dihydrogen phosphate, sodium monohydrogen phosphate, ammonium dihydrogen phosphate and borax in any proportion.
3. The early-strength fast-hardening high-performance refractory castable material prepared from secondary aluminum ash according to claim 1, characterized in that the secondary aluminum ash aggregate comprises the following components in parts by mass: 35-80 wt% of secondary aluminum ash, 15-60 wt% of auxiliary material and 0.1-5 wt% of cross-linking agent; the secondary aluminum ash is formed by extracting aluminum from aluminum ash generated in the casting process, and the main chemical components of the secondary aluminum ash comprise the following components in percentage by mass: al:0 to 10 weight percent; al (Al) 2 O 3 ：30～60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%, and the particle size of the secondary aluminum ash is 0.1-10 mm; the auxiliary material is one or a mixture of more of kaolin, bauxite, mullite and corundum; the cross-linking agent is selected from one or more of polyvinyl alcohol, resin, arabic gum, carboxymethyl cellulose, citric acid, citrate, alginate, methyl cellulose, bentonite, clay, dihydric alcohol, polyalcohol and resin.
4. The early strength and quick hardening type high-performance refractory castable material prepared by using secondary aluminum ash according to claim 1, wherein the secondary aluminum ash fine powder is prepared by performing ball milling, drying and sieving treatment on the secondary aluminum ash; the main chemical components of the material comprise the following components in percentage by mass: al (Al) 2 O 3 ≥60wt％；Fe 2 O 3 Less than or equal to 3wt percent; na is less than or equal to 0.5wt%; k is less than or equal to 0.5wt%; the grain diameter of the secondary aluminum ash fine powder is 5-75 mu m.
5. The early-strength rapid-hardening high-performance refractory castable prepared from secondary aluminum ash according to claim 1, characterized in that the alumina micropowder is a mixture of one or more of alumina content not less than 90% and grain size not more than 10mm in any proportion.
6. The early-strength rapid-hardening high-performance refractory castable prepared from secondary aluminum ash according to claim 1, characterized in that the silica micropowder is a mixture of one or more of silica with content not less than 80% and grain size not more than 100 μm in any proportion.
7. The early-strength rapid-hardening high-performance refractory castable material prepared from secondary aluminum ash according to claim 1, wherein the composite additive is one or a mixture of more of barium sulfate, strontium sulfate, cerium oxide, magnesium oxide, calcium fluoride, aluminum phosphate, magnesium phosphate, silicon nitride, boron nitride, silicon carbide, boron carbide, kyanite, aluminum titanate, calcium aluminate, calcium silicate, andalusite, sillimanite, high silica alumina sol, hydrated alumina micropowder, silica-alumina sol powder and aluminate cement in any proportion.
8. The early-strength rapid-hardening high-performance refractory castable material prepared from secondary aluminum ash according to claim 1, characterized in that the water reducing agent is one or a mixture of several of polyphosphate, metaphosphate, polycarboxylic acid, lignin water reducing agent, naphthalene water reducing agent or dispersed alumina high-efficiency water reducing agent in any proportion.
9. The method for preparing the early-strength rapid-hardening high-performance refractory castable by using the secondary aluminum ash is characterized in that the method for preparing the early-strength rapid-hardening high-performance refractory castable by using the secondary aluminum ash in any one of claims 1 to 8 comprises the following steps:
s1, weighing secondary aluminum ash, auxiliary materials and a cross-linking agent according to the component proportion of the secondary aluminum ash aggregate, and putting the secondary aluminum ash, the auxiliary materials and the cross-linking agent into a high-speed stirrer to be uniformly mixed to prepare a mixed material for later use;
s2, standing the mixed material for ageing for 6 to 8 hours at the temperature of between 25 and 50 ℃ and at the humidity of between 30 and 90 percent;
s3, dry-pressing and granulating the mixed material processed in the step S2 to obtain a green body;
s4, naturally drying the green body for 12-24 hours at the temperature of 25-50 ℃ and the humidity of 30-70%, then drying for 6-8 hours at the temperature of 100-110 ℃, and sintering for 2-24 hours at the temperature of 800-1600 ℃ to prepare the secondary aluminum ash aggregate for later use;
s5, placing the prepared secondary aluminum ash aggregate into a ball mill for ball milling for 0.5 to 48 hours, drying for 10 minutes to 72 hours at the temperature of between 35 and 110 ℃ after ball milling, and sieving to obtain fine powder with the sieve mesh number of between 100 and 500 meshes to obtain secondary aluminum ash fine powder;
s6, weighing secondary aluminum ash aggregate, secondary aluminum ash fine powder, alumina micro powder, silicon micro powder, a composite additive, a cross-linking agent and a water reducing agent according to the component proportion of the dry-mixed material, and putting the materials into a mixer together to be mixed uniformly to obtain the dry-mixed material;
and S7, uniformly mixing the dry stirring material and the liquid excitant in proportion to obtain the early-strength quick-hardening high-performance refractory castable.
10. The method for preparing the early strength and rapid hardening type high performance refractory castable according to claim 9, wherein the ball milling process in step S5 is dry milling or wet milling with alcohol as an auxiliary agent; the use of the casting material: the early strength fast hardening high performance refractory castable is coated or cast on a use position, maintained for 6 to 24 hours at room temperature, dried for 20 to 30 hours at the temperature of 100 to 200 ℃, and roasted for 2 to 8 hours at the temperature of 1000 to 1300 ℃.
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| CN116693307A (en) * | 2023-08-07 | 2023-09-05 | 北京建工环境修复股份有限公司 | Method for preparing light refractory material by using aluminum ash and product |
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| CN116693307B (en) * | 2023-08-07 | 2023-10-27 | 北京建工环境修复股份有限公司 | Method for preparing light refractory material by using aluminum ash and product |
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