CN113372134A - Microporous light silica brick and preparation method thereof - Google Patents
Microporous light silica brick and preparation method thereof Download PDFInfo
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
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Abstract
The invention discloses a microporous light silica brick and a preparation method thereof, wherein the light silica brick is mainly prepared from a mixture and a foaming agent, and the dosage of the foaming agent is 0.1-10% of the mass of the mixture; the mixture comprises the following components in percentage by mass: 70-95% of siliceous material, 1-25% of inorganic cementing material, 0.1-15% of mineralizer and 0.1-5% of additive; the siliceous material comprises siliceous particles and siliceous fine powder, the particle size of the siliceous particles is 0.1-3 mm, the particle size of the siliceous fine powder is less than or equal to 0.075mm, and the mass ratio of the siliceous particles to the siliceous fine powder is (1-65) to (35-99). The microporous light silica brick product has the advantages of fine aperture, small density, low thermal conductivity, high porosity, high mechanical strength, good high-temperature volume stability, strong acid atmosphere and slag corrosion resistance and the like, has low preparation cost and good heat insulation effect, meets the high-temperature environment and heat insulation requirements of the thermal equipment for fine etching, and is suitable for popularization and application.
Description
The application is a divisional application of Chinese patent application with application number CN201510928913.4 and invention name of 'a microporous light silica brick and a preparation method thereof' filed by Chinese patent office of China on 11/12/2015.
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a microporous lightweight silica brick and a preparation method thereof.
Background
Energy is a main factor for maintaining human civilization, and energy conservation and environmental protection are a worldwide research subject at present. In the aspect of energy consumption, the high-temperature industry is the main energy consumption industry of industrial production in China. Research shows that heat loss caused by various kilns and heat transmission pipelines in China is about 3000-4000 ten thousand tons of standard coal each year due to poor heat insulation, and if the novel throttling heat insulation technology is adopted for transformation, the heat loss can be reduced by 20-30%, and the method has a positive effect on energy conservation. Therefore, the high-efficiency heat insulation technology is vigorously developed, the high-quality heat insulation material is widely adopted, the method is one of the main ways for solving the problem of high-temperature industrial energy consumption, and the method has important significance for the healthy development of society and ecology in China.
The light silica brick has the advantages of small volume density, good heat insulation effect, high refractoriness under load, strong acid atmosphere resistance and slag corrosion resistance, and the like, and is widely used as an energy-saving heat-insulating material for vault of glass kilns, walls and vaults of hot blast stoves and the like, thereby reducing heat dissipation loss and improving the working efficiency of the kilns.
At present, the light silica brick is prepared at home and abroad by a method of adding combustible materials or a method of adding light aggregate, for example, anthracite, coke breeze, sawdust, fruit shell powder, polymer light ball and other loss-burning materials are added during burdening, or siliceous light aggregate is added, and then the light silica brick is formed by mechanical pressing and firing. However, the anthracite contains high ash content, so that the firing performance of the product is easily deteriorated, and phenomena such as black cores, cracks, looseness, even fragmentation and the like are generated; although the ash content of the coke breeze is low, the quality and the source of the coke breeze are unstable; the sawdust and the polymer light ball have elasticity, so that the elastic aftereffect of the blank body after the machine pressing forming is difficult to solve and the cracking phenomenon is easy to generate; the lightweight aggregate inevitably introduces impurities such as low-melting matters, so that the refractoriness under load of the product is reduced, the high-temperature volume stability is deteriorated, and the service temperature and the service life of the product are seriously influenced. In addition, the light heat-insulating refractory material with high porosity and fine pore diameter is difficult to prepare by a burning loss method, and the light silica bricks prepared by the method have relatively high volume density, large pore diameter and poor heat-insulating effect and are difficult to meet the requirements of increasingly harsh high-temperature environment and heat insulation of thermal equipment.
Disclosure of Invention
The invention aims to provide a microporous lightweight silica brick, which solves the problems of high volume density, large aperture, low use temperature and poor heat insulation effect of the existing lightweight silica brick.
The second purpose of the invention is to provide a preparation method of the microporous lightweight silica brick.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a micropore light silica brick is mainly prepared from a mixture and a foaming agent, wherein the dosage of the foaming agent is 0.1-10% of the mass of the mixture;
the mixture comprises the following components in percentage by mass: 70-95% of siliceous material, 1-25% of inorganic cementing material, 0.1-15% of mineralizer and 0.1-5% of additive; the siliceous material comprises siliceous particles and siliceous fine powder, the particle size of the siliceous particles is 0.1-3 mm, the particle size of the siliceous fine powder is less than or equal to 0.075mm, and the mass ratio of the siliceous particles to the siliceous fine powder is (1-65) to (35-99).
The siliceous material is any one or a mixture of more than two of silica, quartz, waste silica brick and silicon micropowder.
SiO in the silica2The mass percentage content of the compound is more than or equal to 97 percent; SiO in the quartz2The mass percentage content of the compound is more than or equal to 98 percent; the waste silica brickSiO 22The mass percentage content of the waste silica bricks is more than or equal to 92 percent, and the addition amount of the waste silica bricks is not more than 40 percent of the total mass of the mixture; SiO in the silicon micro powder2The mass percentage content of the compound is more than or equal to 92 percent.
The inorganic cementing material is one or a mixture of more than two of calcium silicate cement, calcium silicate cement clinker, dicalcium silicate, tricalcium silicate, silica sol, silica gel and water glass.
The mineralizer is iron oxide, potassium oxide, sodium oxide, calcium oxide, magnesium oxide, lime milk, fluorite, calcium fluoride, calcium carbonate, titanium oxide, manganese oxide, MnO2Any one or a mixture of more than two of manganese ore powder with the mass content of more than or equal to 20 percent;
the grain size of the mineralizer is less than or equal to 0.088 mm.
The additive is any one or a mixture of more than two of calcium chloride, ferric chloride, aluminum sulfate, calcium sulfate, lithium carbonate, calcium lignosulfonate, sodium lignosulfonate, acrylamide, polyacrylamide, ammonium polyacrylate, polyethylene glycol, polyvinyl alcohol, triethanolamine, carboxymethyl cellulose, sodium carboxymethyl cellulose, methyl cellulose ether, hydroxyethyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxyethyl ethyl cellulose ether, gelatin, Arabic gum, sodium fluosilicate, sodium carbonate, sodium hexametaphosphate, sodium tripolyphosphate and polycarboxylic acid high-efficiency water reducing agent.
The foaming agent is any one or a mixture of more than two of an animal protein foaming agent, a vegetable protein foaming agent, sodium laureth sulfate, sodium lauroyl sarcosinate, alkyl sulfonate with a carbon chain length of 8-20, alkyl sulfate with a carbon chain length of 8-20, alpha-alkenyl sulfonate and fatty alcohol ether sulfate with a carbon chain length of 12-18.
The animal protein foaming agent is any one or a mixture of more than two of an animal hoof keratin foaming agent, an animal hair protein foaming agent and an animal blood glue protein foaming agent; the vegetable protein foaming agent is any one or a mixture of two of a tea saponin vegetable protein foaming agent and a saponin vegetable protein foaming agent.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) uniformly mixing silicon particles, silicon fine powder, an inorganic cementing material, a mineralizer and an additive according to the formula ratio to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the material liquid of 1 (0.25-2), and mixing to prepare slurry;
3) adding a foaming agent in a formula amount into the slurry obtained in the step 2), and uniformly mixing to prepare foam slurry;
4) and (3) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature to enable the foam slurry to be solidified and molded, demolding, drying and firing to obtain the foam slurry.
In the step 1), adding the siliceous particles, the siliceous fine powder, the inorganic cementing material, the mineralizer and the additive into stirring equipment in sequence and uniformly mixing. And 3) after the foaming agent is added, quickly stirring to uniformly mix the system, wherein the stirring time is 1-3 min.
Preferably, in the step 2), the mass ratio of the feed liquid is 1 (0.5-1.0).
And in the step 4), standing at room temperature for 5-72 hours. Preferably, the standing time is 24-48 h.
In the step 4), the drying temperature is 50-110 ℃, and the drying time is 12-48 h.
In the step 4), the sintering temperature is 1350-1650 ℃, and the heat preservation time is 3-60 h. And heating to the sintering temperature at a heating rate of 2-7 ℃/min during sintering. Preferably, the heating rate is 3-5 ℃/min, and the heat preservation time is 3-5 h.
The microporous lightweight silica brick is mainly prepared from a mixture and a foaming agent, wherein the mixture is prepared by compounding siliceous particles, siliceous fine powder, an inorganic cementing material, a mineralizer and an additive, so that the specific gravity of the product is effectively reduced; the obtained silica brick product has the advantages of fine aperture, small volume density, low thermal conductivity, high porosity, high mechanical strength, good high-temperature volume stability, strong acid atmosphere and slag corrosion resistance and the like, and the physicochemical indexes are all superior to the national standard; the raw materials are common materials in the refractory industry, and the material is non-toxic, low in cost, low in process cost, good in heat insulation effect of products, high in refractoriness under load, capable of meeting the high-temperature environment and heat insulation requirements of thermal equipment in rough etching and suitable for popularization and application.
Through detection, the pore diameter of the pores in the microporous lightweight silica brick product is fine and is mostly between 0.2 and 200 mu m; the product has low volume density of 0.3-1.5 g/cm3(ii) a The mechanical strength is high, and the normal-temperature compressive strength is 0.5-30 MPa; the porosity is high and is 33 to 92 percent; the thermal conductivity is low, and the thermal conductivity is 0.12-0.6W/(m.K) at 1100 ℃; the firing line change rate is small and is less than or equal to 1.5 percent; the use temperature is high and reaches 800-1600 ℃.
The preparation method of the microporous lightweight silica brick comprises the steps of mixing siliceous particles, siliceous fine powder, inorganic gelled material, mineralizer and additive, adding water to prepare slurry, adding foaming agent to prepare foam slurry, and then injection molding, standing, demolding, drying and firing to prepare a finished product; the preparation method has the advantages of simple and easily-controlled process, low cost, no toxicity, no pollution, environmental protection, wide development space and wide application prospect.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
The microporous lightweight silica brick is mainly prepared from a mixture and an animal hoof keratin foaming agent, wherein the usage amount of the animal hoof keratin foaming agent is 9% of the mass of the mixture;
the mixture comprises the following components in percentage by mass: 10% silica particles (SiO)298 wt%), 58% of silica fine powder (SiO)298wt percent and 15 percent of silicon micropowder (SiO)292 percent of calcium silicate cement, 1 percent of iron oxide powder, 3 percent of calcium oxide powder, 3 percent of fluorite powder and 2 percent of calcium lignosulfonate.
Wherein the particle size of the silica particles is 0.1-3 mm, and the particle size of the silica fine powder and the silicon micro powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 10: 73.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking silica particles, silica fine powder, silica micro powder, calcium silicate cement, iron oxide powder, calcium oxide powder, fluorite powder and calcium lignosulphonate according to the formula ratio, and sequentially putting the silica particles, the silica fine powder, the silicon micro powder, the calcium silicate cement, the iron oxide powder, the calcium oxide powder, the fluorite powder and the calcium lignosulphonate into a stirrer to be uniformly mixed to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.85, and uniformly stirring and mixing to prepare slurry;
3) adding animal hoof keratin foaming agent with the formula amount into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 48 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained blank into a drying oven at 100 ℃ for drying for 12h, putting the dried blank into a sintering furnace, heating to 1400 ℃ at the heating rate of 3 ℃/min, and preserving heat for 3h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 0.5-0.6 g/cm3The apparent porosity is 74.2-78.6%, the compressive strength is 1.7-2.6 MPa, the linear change rate after firing is 0.46-0.51%, the average pore diameter is 20.6-23.2 μm, and the thermal conductivity at 1100 ℃ is 0.22-0.25W/(m.K).
Example 2
The microporous lightweight silicon brick is mainly prepared from a mixture and a tea saponin plant protein foaming agent, wherein the using amount of the tea saponin plant protein foaming agent is 3% of the mass of the mixture;
the mixture comprises the following components in percentage by mass: 40% silica particles (SiO)299 wt%), 20% of fine silica powder (SiO)299 wt%) and 10% of quartz powder (SiO)299.4wt percent and 10 percent of silicon micropowder (SiO)296 wt%), 10% silica sol, 1% iron oxide powder, 5% lime milk, 3.5% fluorite powder and 0.5% sodium carbonate.
Wherein the particle size of the silica particles is 0.1-3 mm, and the particle size of the silica fine powder, the quartz powder and the silicon micro powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 40: 40.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking silica particles, silica fine powder, quartz powder, silica micropowder, silica sol, ferric oxide powder, lime milk, fluorite powder and sodium carbonate according to the formula ratio, and sequentially putting the silica particles, the silica fine powder, the quartz powder, the silica micropowder, the silica sol, the ferric oxide powder, the lime milk, the fluorite powder and the sodium carbonate into a stirrer to be uniformly mixed to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.55, and uniformly stirring and mixing to prepare slurry;
3) adding a tea saponin vegetable protein foaming agent with the formula amount into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 24 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained blank into a drying box at the temperature of 80 ℃ for drying for 24h, putting the dried blank into a sintering furnace, heating to 1550 ℃ at the heating rate of 3 ℃/min, and preserving heat for 3h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 1.0-1.2 g/cm3The apparent porosity is 48.7-53.0%, the compressive strength is 9.9-14.8 MPa, the linear change rate after firing is 0.12-0.17%, the average pore diameter is 6.2-8.3 μm, and the thermal conductivity at 1100 ℃ is 0.46-0.51W/(m.K).
Example 3
The microporous lightweight silica brick is mainly prepared from a mixture and a foaming agent, wherein the amount of the foaming agent is 3% of the mass of the mixture; the foaming agent comprises the following components in percentage by mass: 20% of sodium dodecyl sulfate and 80% of sodium hexadecyl polyoxyethylene ether sulfate;
the mixture comprises the following components in percentage by mass: 10% silica particles (SiO)298.5wt percent and 15 percent of waste silica brick particles (SiO)294.3 wt%), 55% silica fine powder (SiO)298.5 wt%), 8% of calcium silicate cement, 0.5% of iron oxide powder, 5% of calcium oxide powder, 1% of fluorite powder, 0.5% of sodium tripolyphosphate and 5% of gelatin.
Wherein the particle size of the silica particles and the waste silica brick particles is 0.1-3 mm, and the particle size of the silica fine powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 25: 55.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking silica particles, waste silica brick particles, silica fine powder, calcium silicate cement, iron oxide powder, calcium oxide powder, fluorite powder, sodium tripolyphosphate and gelatin according to the formula ratio, sequentially putting into a stirrer, and uniformly mixing to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.60, and uniformly stirring and mixing to prepare slurry;
3) adding sodium dodecyl sulfate and sodium cetyl polyoxyethylene ether sulfate in a formula amount into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 24 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained green body into a drying box at 110 ℃ for drying for 24h, putting the dried green body into a sintering furnace, heating to 1450 ℃ at the heating rate of 3 ℃/min, and preserving heat for 3h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 0.8-0.9 g/cm3The apparent porosity is 61.6-65.8%, the compressive strength is 6.3-7.9 MPa, the linear change rate after firing is 0.21-0.33%, the average pore diameter is 9.2-10.7 μm, and the thermal conductivity at 1100 ℃ is 0.34-0.37W/(m.K).
Example 4
The microporous lightweight silica brick is mainly prepared from a mixture and a foaming agent, wherein the amount of the foaming agent is 6% of the mass of the mixture; the foaming agent comprises the following components in percentage by mass: 40% of animal hoof keratin foaming agent, 10% of animal hair protein foaming agent and 20% of sodium dodecyl polyoxyethylene ether sulfate;
the mixture comprises the following components in percentage by mass: 20% of quartz particles (SiO)299.5 wt%) and 30% of fine quartz powder (SiO)299.5wt percent and 30 percent of silicon micropowder (SiO)2Content 96 wt%), 10%2% of manganese oxide, 3.5% of calcium oxide, 2% of fluorite powder, 0.5% of calcium chloride and 2% of calcium lignosulfonate.
Wherein the particle size of the quartz particles is 0.1-3 mm, and the particle size of the quartz fine powder and the silicon micro powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 20: 60.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking quartz particles, quartz fine powder, silica micropowder, silica sol, manganese oxide, calcium oxide, fluorite powder, calcium chloride and calcium lignosulphonate according to the formula ratio, and sequentially putting the quartz particles, the quartz fine powder, the silica micropowder, the silica sol, the manganese oxide, the calcium oxide, the fluorite powder, the calcium chloride and the calcium lignosulphonate into a stirrer to be uniformly mixed to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.70, and uniformly stirring and mixing to prepare slurry;
3) adding animal hoof keratin foaming agent, animal hair protein foaming agent and lauryl polyoxyethylene ether sodium sulfate into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 24 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained blank into a drying box at the temperature of 110 ℃ for drying for 24h, putting the dried blank into a sintering furnace, heating to 1550 ℃ at the heating rate of 3 ℃/min, and preserving heat for 3h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 0.6-0.7 g/cm3The apparent porosity is 70.1-74.4%, the compressive strength is 2.7-3.8 MPa, the linear change rate after firing is 0.38-0.42%, the average pore diameter is 13.4-15.7 μm, and the thermal conductivity at 1100 ℃ is 0.28-0.32W/(m.K).
Example 5
The microporous lightweight silica brick of the embodiment is mainly prepared from a mixture and a foaming agent, wherein the amount of the foaming agent is 5% of the mass of the mixture; the foaming agent comprises the following components in percentage by mass: 60% of animal hoof keratin foaming agent and 40% of saponin vegetable protein foaming agent;
the mixture is prepared from the following components in percentage by massComprises the following components: 5% silica particles (SiO)298 wt%), 50% of silica fine powder (SiO)298wt percent and 15 percent of silicon micropowder (SiO)292% by weight of calcium silicate cement, 5% by weight of water glass, and 6% by weight of manganese ore powder (MnO)220wt percent), 4.5 percent of calcium oxide powder, 2 percent of fluorite powder, 0.5 percent of sodium fluosilicate and 1 percent of polycarboxylic acid high-efficiency water reducing agent (2651 f, BASF company in Germany).
Wherein the particle size of the silica particles is 0.1-3 mm, and the particle size of the silica fine powder and the silicon micro powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 5: 65.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking silica particles, silica fine powder, silica micro powder, calcium silicate cement, water glass, manganese mineral powder, calcium oxide powder, fluorite powder, sodium fluosilicate and polycarboxylic acid high-efficiency water reducing agent according to the formula ratio, and sequentially putting the materials into a stirrer to be uniformly mixed to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.70, and uniformly stirring and mixing to prepare slurry;
3) adding the animal hoof keratin foaming agent and the saponin vegetable protein foaming agent into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 48 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained blank into a drying oven at 90 ℃ for drying for 24h, putting the dried blank into a sintering furnace, heating to 1430 ℃ at the heating rate of 3 ℃/min, and preserving heat for 5h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 0.7-0.8 g/cm3The apparent porosity is 65.9-70.1%, the compressive strength is 3.9-5.3 MPa, the linear change rate after firing is 0.31-0.35%, the average pore diameter is 11.5-14.1 μm, and the thermal conductivity at 1100 ℃ is 0.31-0.34W/(m.K).
Example 6
The microporous lightweight silica brick of the embodiment is mainly prepared from a mixture and a foaming agent, wherein the using amount of the foaming agent is 7% of the mass of the mixture; the foaming agent comprises the following components in percentage by mass: 40% of animal hoof keratin foaming agent and 60% of sodium lauryl sulfate;
the mixture comprises the following components in percentage by mass: 5% of quartz particles (SiO)299 wt%), 62% of fine quartz powder (SiO)299wt percent of silicon micropowder (SiO) and 10 percent of silicon micropowder296 wt%), 5% of calcium silicate cement clinker, 10% of silica gel powder, 2% of titanium oxide powder and 2% of manganese ore powder (MnO)260wt percent of calcium oxide, 2 percent of fluorite powder, 0.2 percent of ferric chloride, 0.1 percent of hydroxyethyl ethyl cellulose ether and 0.2 percent of polyacrylamide.
Wherein the particle size of the quartz particles is 0.1-3 mm, and the particle size of the quartz fine powder and the silicon micro powder is less than or equal to 0.075 mm; in the mixture, the mass ratio of the siliceous particles to the siliceous fine powder is 5: 72.
The preparation method of the microporous lightweight silica brick comprises the following steps:
1) taking quartz particles, quartz fine powder, calcium silicate cement clinker, silica gel powder, titanium oxide powder, manganese ore powder, calcium oxide, fluorite powder, ferric chloride, hydroxyethyl ethyl cellulose ether and polyacrylamide according to the formula ratio, sequentially putting into a stirrer, and uniformly mixing to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the feed liquid of 1:0.95, and uniformly stirring and mixing to prepare slurry;
3) adding the animal hoof keratin foaming agent and sodium lauryl sulfate into the slurry obtained in the step 2), and stirring to prepare uniform foam slurry;
4) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature for 48 hours to enable the foam slurry to be cured and molded, and then demolding to obtain a blank body; and (3) putting the obtained blank into a drying box at the temperature of 80 ℃ for drying for 72h, putting the dried blank into a sintering furnace, heating to 1600 ℃ at the heating rate of 3 ℃/min, and preserving heat for 3h to obtain the microporous lightweight silica brick.
Through detection, the volume density of the microporous lightweight silica brick obtained in the embodiment is 0.5-0.6 g/cm3Apparent porosity of 74.4-78.6%, compressive strength of 1.9-2.7 MPa, linear change rate after firing of 0.43-0.47%, average pore diameter of 19.8-21.3 μm, and thermal conductivity of 0.24-0.27W/(m.K) at 1100 ℃.
The raw materials, the amounts and the technical parameters of the microporous lightweight silica bricks of examples 7 to 9 and the preparation method thereof are shown in Table 1, and the rest is the same as example 1.
TABLE 1 tables of raw materials, amounts and technical parameters for microporous lightweight silica bricks of examples 7 to 9 and methods of making the same
TABLE 1
TABLE 2 detection results of the properties of the microporous lightweight silica bricks obtained in examples 7 to 9
| Item | Example 7 | Example 8 | Example 9 |
| Bulk density, g/cm3 | 0.6～0.7 | 0.8～0.9 | 0.34～0.37 |
| Apparent porosity of% | 71.3～75.2 | 61.5～65.3 | 83～85 |
| Compressive strength, MPa | 2.2～3.4 | 4.3～6.1 | 0.6～0.8 |
| The linear rate of change after firing% | 0.7～0.8 | 0.5～0.6 | 0.9～1.1 |
| Average pore diameter, μm | 15.4～18.1 | 13.5～17.2 | 36.7～37.8 |
| Thermal conductivity at 1100 ℃, W/(m.K) | 0.27～0.31 | 0.34～0.38 | 0.2～0.22 |
Claims (5)
1. A micropore light silica brick is characterized in that: the foaming agent is mainly prepared from a mixture and a foaming agent, wherein the dosage of the foaming agent is 0.1-10% of the mass of the mixture;
the mixture comprises the following components in percentage by mass: 70-95% of siliceous material, 1-25% of inorganic cementing material, 0.1-15% of mineralizer and 0.1-5% of additive; the siliceous material comprises siliceous particles and siliceous fine powder, the particle size of the siliceous particles is 0.1-3 mm, the particle size of the siliceous fine powder is less than or equal to 0.075mm, and the mass ratio of the siliceous particles to the siliceous fine powder is 10:73, 20:60, 5:65, 5:72 or 12: 60;
the foaming agent is any one or a mixture of more than two of an animal protein foaming agent, a vegetable protein foaming agent, sodium laureth sulfate, sodium lauroyl sarcosinate, alkyl sulfonate with a carbon chain length of 8-20, alkyl sulfate with a carbon chain length of 8-20, alpha-alkenyl sulfonate and fatty alcohol ether sulfate with a carbon chain length of 12-18; the animal protein foaming agent is any one or a mixture of more than two of an animal hoof keratin foaming agent, an animal hair protein foaming agent and an animal blood glue protein foaming agent; the vegetable protein foaming agent is any one or a mixture of two of a tea saponin vegetable protein foaming agent and a saponin vegetable protein foaming agent;
the siliceous material is any one or a mixture of more than two of silica, quartz, waste silica brick and silicon micropowder;
SiO in the silica2The mass percentage content of the compound is more than or equal to 97 percent; SiO in the quartz2The mass percentage content of the compound is more than or equal to 98 percent; SiO in the waste silica brick2The mass percentage content of the waste silica bricks is more than or equal to 92 percent, and the addition amount of the waste silica bricks is not more than 40 percent of the total mass of the mixture; SiO in the silicon micro powder2The mass percentage content of the compound is more than or equal to 92 percent;
the inorganic cementing material is one or a mixture of more than two of calcium silicate cement, calcium silicate cement clinker, dicalcium silicate, tricalcium silicate, silica sol, silica gel and water glass.
The additive is any one or a mixture of more than two of calcium chloride, ferric chloride, aluminum sulfate, calcium sulfate, lithium carbonate, calcium lignosulfonate, sodium lignosulfonate, acrylamide, polyacrylamide, ammonium polyacrylate, polyethylene glycol, polyvinyl alcohol, triethanolamine, carboxymethyl cellulose, sodium carboxymethyl cellulose, methyl cellulose ether, hydroxyethyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxyethyl ethyl cellulose ether, gelatin, Arabic gum, sodium fluosilicate, sodium carbonate, sodium hexametaphosphate, sodium tripolyphosphate and polycarboxylic acid high-efficiency water reducing agent;
the microporous lightweight silica brick is prepared by the following steps:
1) uniformly mixing silicon particles, silicon fine powder, an inorganic cementing material, a mineralizer and an additive according to the formula ratio to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the material liquid of 1 (0.25-2), and mixing to prepare slurry;
3) adding a foaming agent in a formula amount into the slurry obtained in the step 2), and uniformly mixing to prepare foam slurry;
4) and (3) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature to enable the foam slurry to be solidified and molded, demolding, drying and firing to obtain the foam slurry.
2. The microporous lightweight silica brick according to claim 1, wherein: the mineralizer is iron oxide, potassium oxide, sodium oxide, calcium oxide, magnesium oxide, lime milk, fluorite, calcium fluoride, calcium carbonate, titanium oxide, manganese oxide, MnO2Any one or a mixture of more than two of manganese ore powder with the mass content of more than or equal to 20 percent; the grain size of the mineralizer is less than or equal to 0.088 mm.
3. A method of making the microporous lightweight silica brick of claim 1, wherein: comprises the following steps:
1) uniformly mixing silicon particles, silicon fine powder, an inorganic cementing material, a mineralizer and an additive according to the formula ratio to obtain a mixture;
2) adding water into the mixture obtained in the step 1) according to the mass ratio of the material liquid of 1 (0.25-2), and mixing to prepare slurry;
3) adding a foaming agent in a formula amount into the slurry obtained in the step 2), and uniformly mixing to prepare foam slurry;
4) and (3) injecting the foam slurry obtained in the step 3) into a mold, standing at room temperature to enable the foam slurry to be solidified and molded, demolding, drying and firing to obtain the foam slurry.
4. The method for preparing microporous lightweight silica bricks according to claim 3, wherein: in the step 4), the drying temperature is 50-110 ℃, and the drying time is 12-48 h.
5. The method for preparing microporous lightweight silica bricks according to claim 3, wherein: in the step 4), the sintering temperature is 1350-1650 ℃, and the heat preservation time is 3-60 h.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105686A (en) * | 1986-07-31 | 1987-03-25 | 马家沟耐火材料厂 | A kind of high strength and light weight Si bricks and manufacture method thereof |
| CN103880439A (en) * | 2014-02-17 | 2014-06-25 | 武汉科技大学 | Preparation method of light-weight silica brick |
| CN103951452A (en) * | 2014-05-06 | 2014-07-30 | 郑州大学 | Preparation method of microporous kyanite-based lightweight insulating refractory material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875561B (en) * | 2010-05-07 | 2013-10-16 | 高树森 | Nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and preparation method thereof |
-
2015
- 2015-12-11 CN CN201510928913.4A patent/CN105565850A/en active Pending
- 2015-12-11 CN CN202110718737.7A patent/CN113372134A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105686A (en) * | 1986-07-31 | 1987-03-25 | 马家沟耐火材料厂 | A kind of high strength and light weight Si bricks and manufacture method thereof |
| CN103880439A (en) * | 2014-02-17 | 2014-06-25 | 武汉科技大学 | Preparation method of light-weight silica brick |
| CN103951452A (en) * | 2014-05-06 | 2014-07-30 | 郑州大学 | Preparation method of microporous kyanite-based lightweight insulating refractory material |
Non-Patent Citations (2)
| Title |
|---|
| 云正宽: "《冶金工程设计 第2册 工艺设计》", 30 June 2006, 冶金工业出版社, pages: 997 * |
| 任国斌等: "《Al2O3-SiO2系实用耐火材料》", 30 September 1988, 冶金工业出版社, pages: 108 - 111 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163224A (en) * | 2021-12-15 | 2022-03-11 | 洛阳迈乐耐火材料有限公司 | Fiber-reinforced silicon module and preparation method thereof |
| CN114262234A (en) * | 2021-12-31 | 2022-04-01 | 洛阳安耐克科技股份有限公司 | Ultra-dense silica brick for blast furnace and hot blast stove and preparation method thereof |
| CN114890799A (en) * | 2022-04-26 | 2022-08-12 | 山东耐火材料集团有限公司 | Special-shaped and large-sized silica brick and production method thereof |
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