CN111099903A - Ceramsite refractory material based on slurry resource soil and preparation method thereof - Google Patents

Ceramsite refractory material based on slurry resource soil and preparation method thereof Download PDF

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CN111099903A
CN111099903A CN201911416344.XA CN201911416344A CN111099903A CN 111099903 A CN111099903 A CN 111099903A CN 201911416344 A CN201911416344 A CN 201911416344A CN 111099903 A CN111099903 A CN 111099903A
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powder
ceramsite
slurry
refractory material
mud
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肖建庄
李志卫
马志鸣
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Tongji University
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Tongji University
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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
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/448—Sulphates or sulphites

Abstract

The invention relates to a ceramsite refractory material based on slurry resource soil and a preparation method thereof, wherein the ceramsite refractory material comprises the following components in parts by weight: mud ceramsite, mud powder and Al2O3Micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate; the preparation method comprises the following steps: 1) mixing the slurry powder, the municipal sludge powder and the industrial sludge powder to obtain a mixture; 2) granulating the mixture to obtain material balls; 3) preheating, roasting and cooling the pellets in sequence to obtain slurry ceramsite; 4) mixing the slurry ceramsite with the slurry powder and Al2O3Mixing the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate to obtain the ceramsite refractory material. Compared with the prior art, the invention obtains the slurry ceramsite with excellent fire resistance by recycling and harmless utilization of the engineering slurry and optimizing the chemical components of the raw materials by using the municipal sludge and the industrial sludge, and solves the problem that the slurry can not be effectively treated for a long time.

Description

Ceramsite refractory material based on slurry resource soil and preparation method thereof
Technical Field
The invention belongs to the technical field of mud resource utilization, and relates to a ceramsite refractory material based on mud resource soil and a preparation method thereof.
Background
The slurry plays roles of wall protection, hole cleaning, slag discharge, cooling and the like in the construction processes of bored concrete pile drilling, underground continuous wall grooving, shield tunneling and the like, and is widely applied to projects such as buildings, bridges, tunnels and the like. China generates about 8000 million tons of waste every yearMud, and the amount of mud is increasing year by year. The dehydrated slurry is mainly composed of 60-80% SiO210-20% of Al2O3And a small amount of Fe2O3、MgO、CaO、K2O、Na2O、TiO2And the like. In some regions for supervision and leakage, mud is directly discharged into cultivated land or river channels by some enterprises, so that serious land or river pollution is caused. At present, the slurry is mainly treated by a landfill method. However, the landfill not only occupies a large amount of land, but also the produced heavy metal ion penetrating fluid threatens the safety of water sources, and the methane generated by the decomposition of the slurry can also cause explosion accidents. Therefore, an environment-friendly and safe method for realizing resource utilization of the slurry is urgently needed. Municipal sludge is a solid precipitate with high water content generated by municipal sewage plants, water supply and drainage pipe networks and the like, and industrial sludge mainly comes from the industrial fields of metallurgy, chemical industry, electroplating and the like. Municipal sludge also contains SiO2、Al2O3、Fe2O3Chemical components such as MgO and CaO are different from the slurry only in content, and the chemical components of the industrial sludge are more complicated. Similar to slurry, municipal and industrial sludge also have the problems of large production amount and low harmless treatment rate, and a new technology is needed for resource utilization.
The ceramsite is formed by sintering clay, shale or coal gangue and the like, and the hard ceramic shell and the honeycomb core ensure that the ceramsite has the advantages of small density, high strength, good freezing resistance and the like, and the ceramsite becomes a good refractory raw material due to lower thermal conductivity. Ceramsite has a large number of applications in the fields of building materials, gardening, chemical engineering and the like, but the exploitation of the traditional ceramsite raw materials consumes a large amount of high-quality soil and destroys the ecological environment, so that new alternative raw materials need to be found. According to the Riley ternary phase diagram, when the raw material is composed of 53-79% of SiO210-25% of Al2O3And 13-26% Fe2O3、MgO、CaO、K2O、Na2O, and the like, and sintering the mixture into ceramsite. The chemical components of the slurry and the content of the slurry are basically consistent, and municipal and industrial sludge can further optimize the chemical components of raw materials to obtain the slurry ceramsite with excellent fire resistance.
High-temperature production links exist in various fields such as metallurgy, chemical industry, machinery, electric power, military industry and the like, and the heat storage and heat dissipation loss of a high-temperature kiln furnace reaches 20-45% of the total energy consumption. Therefore, a refractory having low thermal conductivity, low density and high strength is economically important for industrial production.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a ceramsite refractory material based on mud resource soil and a preparation method thereof, which are used for realizing resource and harmless treatment of mud.
The purpose of the invention can be realized by the following technical scheme:
a ceramsite refractory material based on slurry resource soil comprises the following components in percentage by weight: 50-65% of mud ceramsite, 20-30% of mud powder and Al2O30-5% of micro powder, 5-10% of aluminate cement, 8-15% of water, 0-0.5% of gypsum powder, 0-0.5% of triethanolamine and 0-0.05% of calcium lignosulfonate.
Wherein, the mud ceramsite plays a role in fire resistance and heat insulation and is used as a framework of a fire-resistant material to bear external load, so that the weight percentage content reaches 50-65%; the slurry powder is a bonding agent in the refractory material, and the slurry powder fully wraps the bulk slurry ceramsite into a whole, and the weight percentage of the slurry powder also reaches 20-30%; al (Al)2O3The micro powder has good thermal stability, and the fire resistance of the reinforced material can be added by 0-5% according to the actual engineering requirements; the aluminate cement is a curing agent, can generate hydration reaction with the aluminate cement, can also generate ion exchange, aggregation and hard setting reaction with slurry powder, and can give consideration to both strength and economy when the weight percentage is 5-10%; water is a necessary raw material for hydration of aluminate cement, and can be 8-15% for ensuring complete hydration of the cement; the gypsum powder and the triethanolamine are strength regulators, can enhance the strength of the aluminate cement after hydration hardening, and can achieve more ideal effect when the weight percentage content is 0-0.5%; the calcium lignosulphonate is a water reducing agent, and the construction quality can be effectively improved when the weight percentage content is 0-0.05%.
Further, the mud ceramsite comprises the following components in percentage by weight: 70-100% of slurry powder, 0-30% of municipal sludge powder and 0-30% of industrial sludge powder.
SiO in slurry powder2、Al2O3And Fe2O3Chemical components meet the conditions of sintering into pottery, but the content of the chemical components has great influence on the strength, the pore structure, the roasting temperature and the like of the ceramsite. Compared with slurry powder, SiO in municipal sludge powder and industrial sludge powder2、Al2O3And Fe2O3Etc. are present in widely varying amounts. Therefore, the mud powder is used as the main raw material, and 0-30% of municipal sludge powder and industrial sludge powder are used for optimizing chemical components, so that the obtained ceramsite can meet specific engineering requirements.
Further, the slurry powder is obtained by sequentially carrying out dehydration, drying and grinding processes on engineering waste slurry, and the particle size of the slurry powder is not more than 200 meshes so as to fully exert the chemical activity of the slurry powder.
Further, municipal sludge powder is obtained through processes of dewatering, drying and grinding of municipal sludge in sequence, and the particle size of the municipal sludge powder is not larger than 200 meshes so as to give full play to the chemical activity of the municipal sludge powder.
Further, the industrial sludge powder is obtained by sequentially carrying out dehydration, drying and grinding processes on industrial sludge, and the particle size of the industrial sludge powder is not more than 200 meshes so as to fully exert the chemical activity of the industrial sludge powder.
Further, the particle size of the gypsum powder is not more than 200 meshes, so that the chemical activity of the gypsum powder is fully exerted.
The preparation method of the ceramsite refractory material based on the slurry resource soil comprises the following steps:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 5-10min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder to obtain a mixture;
2) placing the mixture obtained in the step 1) into a granulator for granulation to obtain material balls;
3) sequentially carrying out preheating, roasting and cooling processes on the pellets in the step 2) to obtain slurry ceramsite;
4) mixing the slurry ceramsite and the slurry powder in the step 3) with Al2O3And putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate into a stirrer, and stirring and mixing uniformly to obtain the ceramsite refractory material.
Further, the step 2) is specifically that the mixture obtained in the step 1) is placed in a granulator, atomized water is sprayed, and then the granulator is operated for 5-45min to obtain material balls;
the atomized water can make the water fully contact with the raw materials, so that a better granulation effect is achieved, and the granulator can operate for 5-45min to obtain material balls with different particle sizes.
The grain diameter of the material ball is 0.5-15 mm.
If the particle size of the pellets is too small, the phenomenon of kiln caking or caking is easy to occur, and if the particle size exceeds 15mm, the pellets are difficult to burn through, which affects the quality of the ceramsite.
Further, in the step 3), the preheating temperature is 400-600 ℃ and the preheating time is 20-30min in the preheating process.
At the temperature of 400-600 ℃, the water in the pellets is evaporated to form more stable pellets, and part of organic matters and carbonate are decomposed to generate gas, so that the pellets can be prevented from cracking in the roasting process.
Further, in the step 3), in the roasting process, the roasting temperature is 1000-1200 ℃, and the roasting time is 25-35 min; if the roasting temperature is too low, the sintering of the pellets is insufficient, and if the temperature is too high, the ceramsite is bonded into a mass, so that the production cost is increased.
And the cooling process is to naturally cool the roasted pellets to room temperature to obtain the slurry ceramsite.
The invention realizes the resource utilization of the slurry, solves the problems of land occupation, water source threat, flammability, explosiveness and the like in the slurry treatment process, and the obtained refractory material has the advantages of low thermal conductivity, small density, high strength and the like, and has very high social and economic values.
Compared with the prior art, the invention has the following characteristics:
1) the invention obtains the slurry ceramsite with excellent fire resistance by recycling and harmless utilization of the engineering slurry and optimizing the chemical components of the raw materials by using the municipal sludge and the industrial sludge, and solves the problem that the slurry cannot be effectively treated for a long time;
2) the invention utilizes the characteristics of low thermal conductivity, light weight and high strength of the slurry ceramsite, and is matched with raw materials such as a bonding agent, a curing agent, a strength regulator and the like to obtain the unshaped refractory material, and the refractory material is poured into a mould to obtain the shaped refractory material without sintering, thereby realizing the unification of social benefit, ecological benefit and economic benefit.
Drawings
FIG. 1 is a schematic view of the process for preparing ceramsite refractory according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
in the embodiment, the ceramsite refractory material based on the slurry resource soil comprises the following components in percentage by weight: 50% of mud ceramsite, 25% of mud powder and Al2O33% of micro powder, 10% of aluminate cement, 11.5% of water, 0.2% of gypsum powder, 0.25% of triethanolamine and 0.05% of calcium lignosulfonate.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the materials to obtain a mixture;
2) putting the mixture obtained in the step 1) into a granulator, spraying atomized water, and then operating the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) mixing the slurry ceramsite and slurry powder obtained in the step 3) with Al2O3Putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulphonate into a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 2:
in the embodiment, the ceramsite refractory material based on the slurry resource soil comprises the following components in percentage by weight: 50% of mud ceramsite, 30% of mud powder, 5% of aluminate cement, 14% of water, 0.5% of gypsum powder and 0.5% of triethanolamine.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder;
2) placing the mixture obtained in the step 1) into a granulator for granulation, spraying atomized water when the granulator is started for 10min, and continuing to operate the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) and (3) placing the slurry ceramsite and the slurry powder obtained in the step 3), aluminate cement, water, gypsum powder and triethanolamine in a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 3:
in the embodiment, the ceramsite refractory material based on the slurry resource soil comprises the following components in percentage by weight: 57.5 percent of mud ceramsite and 20 percent of mud powder，Al2O32.5 percent of micro powder, 7.5 percent of aluminate cement, 11.5 percent of water, 0.5 percent of gypsum powder, 0.48 percent of triethanolamine and 0.02 percent of calcium lignosulfonate.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder;
2) placing the mixture obtained in the step 1) into a granulator for granulation, spraying atomized water when the granulator is started for 10min, and continuing to operate the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain the slurry ceramsite.
4) Mixing the slurry ceramsite and slurry powder obtained in the step 3) with Al2O3Putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulphonate into a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 4:
in the embodiment, the ceramsite refractory material based on the slurry resource soil comprises the following components in percentage by weight: 56% of mud ceramsite, 25% of mud powder, 5% of aluminate cement, 13% of water, 0.5% of gypsum powder and 0.5% of triethanolamine.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder;
2) placing the mixture obtained in the step 1) into a granulator for granulation, spraying atomized water when the granulator is started for 10min, and continuing to operate the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain the slurry ceramsite.
4) And (3) placing the slurry ceramsite and the slurry powder obtained in the step 3), aluminate cement, water, gypsum powder and triethanolamine in a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 5:
in the embodiment, the ceramsite refractory material based on the slurry resource soil comprises the following components in percentage by weight: 55.5 percent of mud ceramsite, 30 percent of mud powder and Al2O30.7 percent of micro powder, 5 percent of aluminate cement, 8 percent of water, 0.5 percent of gypsum powder, 0.25 percent of triethanolamine and 0.05 percent of calcium lignosulphonate.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder;
2) placing the mixture obtained in the step 1) into a granulator for granulation, spraying atomized water when the granulator is started for 10min, and continuing to operate the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain the slurry ceramsite.
4) Mixing the slurry ceramsite and slurry powder obtained in the step 3) with Al2O3Putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulphonate into a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 6:
in the embodiment, the ceramsite refractory material based on the mud resource soil comprises the following components and weightThe weight percentage content is as follows: 61% of mud ceramsite, 25% of mud powder and Al2O30.7 percent of micro powder, 5 percent of aluminate cement, 8 percent of water, 0.25 percent of triethanolamine and 0.05 percent of calcium lignosulphonate.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 10% of municipal sludge powder and 10% of industrial sludge powder.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder, the municipal sludge powder and the industrial sludge powder into a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder;
2) placing the mixture obtained in the step 1) into a granulator for granulation, spraying atomized water when the granulator is started for 10min, and continuing to operate the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain the slurry ceramsite.
4) Mixing the slurry ceramsite and slurry powder obtained in the step 3) with Al2O3Putting the micro powder, aluminate cement, water, triethanolamine and calcium lignosulphonate into a stirrer, and uniformly stirring to obtain the ceramsite refractory material.
Example 7:
a ceramsite refractory material based on slurry resource soil comprises the following components in percentage by weight: 50% of mud ceramsite, 30% of mud powder, 10% of aluminate cement and 10% of water.
The mud ceramsite comprises the following components in percentage by weight: 70% of slurry powder and 30% of municipal sludge powder;
the slurry powder and the municipal sludge powder are obtained by sequentially dehydrating, drying and grinding engineering waste slurry and municipal sludge respectively, and the particle diameters of the slurry powder and the municipal sludge powder are not more than 200 meshes.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder and the municipal sludge powder into a mixing bin, and stirring for 5min to uniformly mix the slurry powder and the municipal sludge powder to obtain a mixture;
2) putting the mixture obtained in the step 1) into a granulator, spraying atomized water, and then operating the granulator for 5min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 400 ℃ for 20min, then roasting at 1000 ℃ for 25min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) and (3) placing the slurry ceramsite obtained in the step 3), slurry powder, aluminate cement and water in a stirrer, and uniformly stirring and mixing to obtain the ceramsite refractory material.
Example 8:
a ceramsite refractory material based on slurry resource soil comprises the following components in percentage by weight: 65% of mud ceramsite, 20% of mud powder and Al2O31% of micro powder, 5% of aluminate cement, 8% of water, 0.5% of gypsum powder and 0.5% of triethanolamine.
The mud ceramsite comprises the following components in percentage by weight: 70% of slurry powder and 30% of industrial sludge powder;
the slurry powder and the industrial sludge powder are obtained by sequentially dehydrating, drying and grinding engineering waste slurry and industrial sludge respectively, and the particle diameters of the slurry powder, the industrial sludge powder and the gypsum powder are not more than 200 meshes.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) proportionally placing the slurry powder and the industrial sludge powder into a mixing bin, and stirring for 10min to uniformly mix the slurry powder and the industrial sludge powder to obtain a mixture;
2) putting the mixture obtained in the step 1) into a granulator, spraying atomized water, and then operating the granulator for 45min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 600 ℃ for 30min, then roasting at 1200 ℃ for 35min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) mixing the slurry ceramsite and the slurry powder in the step 3) with Al2O3Putting the micro powder, aluminate cement, water, gypsum powder and triethanolamine into a stirrer, and stirring and mixing uniformly to obtain the potteryA granular refractory material.
Example 9:
a ceramsite refractory material based on slurry resource soil comprises the following components in percentage by weight: 51% of mud ceramsite, 21% of mud powder and Al2O35% of micro powder, 7.3% of aluminate cement, 15% of water, 0.32% of gypsum powder, 0.33% of triethanolamine and 0.05% of calcium lignosulfonate.
Wherein the mud ceramsite is prepared from mud powder;
the slurry powder is obtained by sequentially dehydrating, drying and grinding engineering waste slurry, and the particle sizes of the slurry powder and the gypsum powder are not more than 200 meshes.
The ceramsite refractory material in the embodiment is prepared by the following method:
1) placing the slurry powder in a mixing bin, and stirring for 8min to uniformly mix the slurry powder and the slurry powder to obtain a mixture;
2) putting the mixture obtained in the step 1) into a granulator, spraying atomized water, and then operating the granulator for 40min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) mixing the slurry ceramsite and the slurry powder in the step 3) with Al2O3And putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate into a stirrer, and stirring and mixing uniformly to obtain the ceramsite refractory material.
Example 10:
a ceramsite refractory material based on slurry resource soil comprises the following components in percentage by weight: 51% of mud ceramsite, 23% of mud powder and Al2O35% of micro powder, 5.3% of aluminate cement, 15% of water, 0.37% of gypsum powder, 0.3% of triethanolamine and 0.03% of calcium lignosulfonate.
The mud ceramsite comprises the following components in percentage by weight: 80% of slurry powder, 15% of municipal sludge powder and 5% of industrial sludge powder;
the slurry powder, the municipal sludge powder and the industrial sludge powder are obtained by sequentially dehydrating, drying and grinding engineering waste slurry, municipal sludge and industrial sludge respectively, and the particle diameters of the slurry powder, the municipal sludge powder, the industrial sludge powder and the gypsum powder are not more than 200 meshes.
As shown in fig. 1, the ceramsite refractory in this example is prepared by the following method:
1) placing the slurry powder, the municipal sludge powder and the industrial sludge powder in a mixing bin, and stirring for 8min to uniformly mix the slurry powder, the municipal sludge powder and the industrial sludge powder to obtain a mixture;
2) putting the mixture obtained in the step 1) into a granulator, spraying atomized water, and then operating the granulator for 35min to obtain material balls with the particle size of 0.5-15 mm;
3) preheating the pellets in the step 2) at 500 ℃ for 25min, then roasting at 1100 ℃ for 30min, and finally naturally cooling to room temperature to obtain slurry ceramsite;
4) mixing the slurry ceramsite and the slurry powder in the step 3) with Al2O3And putting the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate into a stirrer, and stirring and mixing uniformly to obtain the ceramsite refractory material.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. A ceramsite refractory material based on slurry recycled soil is characterized by comprising the following components in percentage by weight: 50-65% of mud ceramsite, 20-30% of mud powder and Al2O30-5% of micro powder, 5-10% of aluminate cement, 8-15% of water, 0-0.5% of gypsum powder, 0-0.5% of triethanolamine and 0-0.05% of calcium lignosulfonate.
2. The ceramsite refractory material based on mud resource soil as claimed in claim 1, wherein the mud ceramsite comprises the following components in percentage by weight: 70-100% of slurry powder, 0-30% of municipal sludge powder and 0-30% of industrial sludge powder.
3. The ceramsite refractory material based on mud resource soil as claimed in claim 2, wherein the mud powder is obtained by sequentially dehydrating, drying and grinding engineering waste mud,
the particle size of the slurry powder is not more than 200 meshes.
4. The ceramsite refractory material based on mud resource soil as claimed in claim 2, wherein said municipal sludge powder is obtained by sequentially dehydrating, drying and grinding municipal sludge,
the particle size of the municipal sludge powder is not more than 200 meshes.
5. The ceramsite refractory material based on mud resource soil as claimed in claim 2, wherein said industrial sludge powder is obtained by sequentially dehydrating, drying and grinding industrial sludge,
the particle size of the industrial sludge powder is not more than 200 meshes.
6. The ceramsite refractory material based on mud resource soil as claimed in claim 2, wherein the particle size of said gypsum powder is not more than 200 meshes.
7. The method for preparing ceramsite refractory material based on mud resource soil as defined in any one of claims 1 to 6, wherein the method comprises the following steps:
1) mixing and stirring the slurry powder, the municipal sludge powder and the industrial sludge powder for 5-10min to obtain a mixture;
2) placing the mixture obtained in the step 1) into a granulator for granulation to obtain material balls;
3) sequentially carrying out preheating, roasting and cooling processes on the pellets in the step 2) to obtain slurry ceramsite;
4) mixing the slurry ceramsite and the slurry powder in the step 3) with Al2O3And uniformly mixing the micro powder, aluminate cement, water, gypsum powder, triethanolamine and calcium lignosulfonate to obtain the ceramsite refractory material.
8. The preparation method of the ceramsite refractory material based on the slurry resource soil as claimed in claim 7, wherein the step 2) is specifically that the mixture obtained in the step 1) is placed in a granulator, atomized water is sprayed, and then the granulator is operated for 5-45min to obtain material balls;
the grain diameter of the material ball is 0.5-15 mm.
9. The method as claimed in claim 7, wherein in the step 3), the preheating temperature is 400-600 ℃ and the preheating time is 20-30 min.
10. The method for preparing ceramsite refractory material based on mud resource soil as recited in claim 7, wherein in the step 3), the calcination temperature is 1000-1200 ℃ and the calcination time is 25-35 min;
and the cooling process is to naturally cool the roasted pellets to room temperature to obtain the slurry ceramsite.
CN201911416344.XA 2019-12-31 2019-12-31 Ceramsite refractory material based on slurry resource soil and preparation method thereof Pending CN111099903A (en)

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