CN105565850A - Micropore light weight silica brick and preparation method thereof - Google Patents

Micropore light weight silica brick and preparation method thereof Download PDF

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Publication number
CN105565850A
CN105565850A CN201510928913.4A CN201510928913A CN105565850A CN 105565850 A CN105565850 A CN 105565850A CN 201510928913 A CN201510928913 A CN 201510928913A CN 105565850 A CN105565850 A CN 105565850A
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siliceous
silica brick
porous silica
light porous
fine powder
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李文凤
郭会师
韩平
叶方保
侯永改
邹文俊
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Henan University of Technology
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Henan University of Technology
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Priority to CN201510928913.4A priority Critical patent/CN105565850A/en
Priority to CN202110718737.7A priority patent/CN113372134A/en
Publication of CN105565850A publication Critical patent/CN105565850A/en
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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
    • 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
    • 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
    • C04B35/01—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
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C04B2235/9615—Linear firing shrinkage

Abstract

The invention discloses a micropore light weight silica brick and a preparation method thereof. The light weight silica brick is mainly prepared from a mixture and a foaming agent; a use quantity of the foaming agent is 0.1% to 10% of mass of the mixture; the mixture consists of the following components in percentage by mass: 70% to 95% of siliceous material, 1% to 25% of inorganic cementitious material, 0.1% to 15% of mineralizer, and 0.1% to 5% of additive, wherein the siliceous material consists of siliceous particles and siliceous fine powder, a particle size of the siliceous particles is 0.1 to 3mm, a particle size of the siliceous fine powder is smaller than or equal to 0.075mm, and a mass ratio of the siliceous particles to the siliceous fine powder is (1 to 65):(35 to 99). The obtained micropore light weight silica brick product has the advantages of fine aperture, small density, low thermal conductivity, high porosity, high mechanical intensity, high high-temperature volume stability, high resistance to the acid atmosphere, high slagging resistance and the like, is low in preparation cost and good in heat insulation effect, meets the harsh requirements of thermal equipment for a high-temperature environment and heat insulation, and is suitable for popularization and application.

Description

A kind of light porous silica brick and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of light porous silica brick, also relate to a kind of preparation method of light porous silica brick simultaneously.
Background technology
The energy is the principal element maintaining human civilization, and current energy-conserving and environment-protective become a global research topic.In energy consumption, hot industry is the industrial main power consumption industry of China.Research shows, all kinds of kiln of China and heat supply pipeline are not good at because being incubated, and the thermosteresis caused every year amounts to mark about 3000 ~ 4,000 ten thousand tons, coal, transforms according to novel throttling heat preservation technology, thermosteresis 20% ~ 30% can be reduced, to save energy, there is active effect.Therefore, greatly developing effectively insulating technology, extensively adopt high-quality insulative lagging material, is one of main path solving hot industry energy consumption problem, significant to the sound development of Chinese society and ecology.
Because having, volume density is little, good heat-insulation effect, refractoriness under load are high for light silicious brick, resistance to acid atmosphere and the advantage such as slag corrosion resistance ability is strong, the vault of glass furnace and the position such as the body of wall of hotblast stove and dome is widely used in as a kind of energy-saving and heat-insulating material, thus minimizing heat lost by radiation, improve the working efficiency of kiln.
At present, prepare the many employings of light silicious brick both at home and abroad and add combustiblematerials method or aglite method, as admixture hard coal, coke breeze, wood sawdust, shell powder, the light ball of polymkeric substance etc. burn lost article when preparing burden, or adding siliceous aglite etc., then firing form by mechanical pressing.But hard coal contains higher ash content, easily make the firing property of goods be deteriorated, and produce evil mind, crackle, the loose phenomenon such as even cracked; Though coke breeze ash oontent is lower, its quality and source instability; Wood sawdust and the light ball of polymkeric substance flexible, after mechanical pressing the retarded elasticity effect of base substrate be difficult to solve, easily produce cracking phenomena; Aglite inevitably introduces the impurity such as eutectic again, makes that the refractoriness under load of goods reduces, high volume bad stability, has a strong impact on its use temperature and life-span.In addition, burn mistake method and be difficult to prepare the high and light thermal-shield refractory material that aperture is fine of void content, the volume density of its made light silicious brick is relatively high, aperture is comparatively large, effect of heat insulation is poor, is difficult to meet hot environment and insulation requirement that Thermal Equipment more and more just carves.
Summary of the invention
The object of this invention is to provide a kind of light porous silica brick, solve that existing light silicious brick volume density is high, aperture is large, use temperature is low and the problem of effect of heat insulation difference.
Second object of the present invention is to provide a kind of preparation method of light porous silica brick.
In order to realize above object, the technical solution adopted in the present invention is:
A kind of light porous silica brick, make primarily of compound and whipping agent, the consumption of whipping agent is 0.1% ~ 10% of mixture quality;
Described compound is made up of the component of following mass percent: siliceous material 70% ~ 95%, inorganic coagulation material 1% ~ 25%, mineralizer 0.1% ~ 15%, additive 0.1% ~ 5%; Wherein, described siliceous material is made up of siliceous particles and siliceous fine powder, and the particle diameter of siliceous particles is 0.1 ~ 3mm, the particle diameter≤0.075mm of siliceous fine powder, and the mass ratio of siliceous particles and siliceous fine powder is (1 ~ 65): (35 ~ 99).
Described siliceous material is any one or two or more mixtures in silica, quartz, useless silica brick, silicon powder.
SiO in described silica 2mass percentage>=97%; SiO in described quartz 2mass percentage>=98%; SiO in described useless silica brick 2mass percentage>=92%, and the addition of useless silica brick is not more than 40% of compound total mass; SiO in described silicon powder 2mass percentage>=92%.
Described inorganic coagulation material is any one or two or more mixtures in calcium silicate cement, calcium silicate cement grog, Dicalcium Phosphate (Feed Grade), tricalcium silicate, silicon sol, Silica hydrogel, water glass.
Described mineralizer is ferric oxide, potassium oxide, sodium oxide, calcium oxide, magnesium oxide, milk of lime, fluorite, Calcium Fluoride (Fluorspan), calcium carbonate, titanium oxide, manganese oxide, MnO 2any one or two or more mixtures in the manganese mineral powder of mass content>=20%; Particle diameter≤the 0.088mm of described mineralizer.
Described additive is calcium chloride, iron(ic) chloride, Tai-Ace S 150, calcium sulfate, Quilonum Retard, calcium lignin sulphonate, sodium lignosulfonate, acrylamide, polyacrylamide, ammonium polyacrylate, polyoxyethylene glycol, polyvinyl alcohol, trolamine, carboxymethyl cellulose, Xylo-Mucine, methyl cellulose ether, Natvosol, hydroxyethyl ether cellulose, ethoxyl methyl cellulose ether, hydroxyethyl ethylcellulose ether, gelatin, gum arabic, Sodium Silicofluoride, sodium carbonate, Sodium hexametaphosphate 99, tripoly phosphate sodium STPP, any one or two or more mixtures in high-efficiency water-reducing agent of poly-carboxylic acid.
The alkyl-sulphate that the alkylsulfonate that described whipping agent is animal protein foaming agent, vegetable-protein whipping agent, laureth sodium sulfovinate, lauryl alcohol sodium sulfovinate, sodium lauroyl sareosine, carbon chain lengths are 8 ~ 20, carbon chain lengths are 8 ~ 20, a-alkenyl sulphonate, carbon chain lengths are any one or two or more mixtures in the fatty alcohol ether sulphate of 12 ~ 18.
Described animal protein foaming agent is any one or two or more mixtures in animal hoof and foot protein foaming agent, animal hair protein foaming agent, animal blood glue protein whipping agent; Described vegetable-protein whipping agent is the mixture of any one or two kinds in tea saponin vegetable-protein whipping agent, Saponin/TSM vegetable-protein whipping agent.
A preparation method for above-mentioned light porous silica brick, comprises the following steps:
1) get the siliceous particles of formula ratio, siliceous fine powder, inorganic coagulation material, mineralizer, additive mix, obtain compound;
2) be 1:(0.25 ~ 2 according to feed liquid mass ratio), to step 1) add water in gained compound, be mixed and made into slip;
3) to step 2) add the whipping agent of formula ratio in gained slip, mix and make foam slurry;
4) by step 3) gained foam slurry injects mould, and room temperature leaves standstill and makes the demoulding after its curing molding, and drying is also burnt till, and to obtain final product.
Step 1) in, siliceous particles, siliceous fine powder, inorganic coagulation material, mineralizer, additive are added in whipping device successively and mixes.Step 3) in, after adding whipping agent, rapid stirring makes system mix, and churning time is 1 ~ 3min.
Preferably, step 2) in, feed liquid mass ratio is 1:(0.5 ~ 1.0).
Step 4) in, the time that room temperature leaves standstill is 5 ~ 72h.Preferably, time of repose is 24 ~ 48h.
Step 4) in, the temperature of described drying is 50 ~ 110 DEG C, and the time is 12 ~ 48h.
Step 4) in, described in the temperature of burning till be 1350 ~ 1650 DEG C, soaking time is 3 ~ 60h.When burning till, be heated to firing temperature with the temperature rise rate of 2 ~ 7 DEG C/min.Preferably, temperature rise rate is 3 ~ 5 DEG C/min, and soaking time is 3 ~ 5h.
Light porous silica brick of the present invention, makes primarily of compound and whipping agent, and compound is formed by siliceous particles, siliceous fine powder, inorganic coagulation material, mineralizer and additive compound, effectively alleviates the proportion of goods; Gained silica brick goods have the advantages such as aperture is fine, volume density is little, thermal conductivity is low, void content is high, physical strength is high, high volume good stability, resistance to acid atmosphere and scouring ability are strong, and physical and chemical index is all better than national standard; Raw material is refractories industry and commonly uses material, nontoxic and cheap, and process costs is low, and goods good heat-insulation effect, refractoriness under load are high, meets hot environment and insulation requirement that Thermal Equipment just carves, is applicable to applying.
After testing, in light porous silica brick goods of the present invention, air vent aperture is fine, how between 0.2 ~ 200 μm; Product volume density is low, is 0.3 ~ 1.5g/cm 3; Physical strength is high, and cold crushing strength is 0.5 ~ 30MPa; Void content is high, is 33% ~ 92%; Thermal conductivity is low, and when 1100 DEG C, thermal conductivity is 0.12 ~ 0.6W/ (mK); Burning line velocity of variation is little, burning line velocity of variation≤1.5%; Use temperature is high, and use temperature is up to 800 ~ 1600 DEG C.
The preparation method of light porous silica brick of the present invention, add water after siliceous particles, siliceous fine powder, inorganic coagulation material, mineralizer and additive are mixed to make slip, add whipping agent again and make foam slurry, then through injection molding, leave standstill, the demoulding, drying be fired into finished product; This preparation method's technique is simple and easy to control, with low cost, nontoxic pollution-free, environmental protection, there is wide development space and application prospect.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
The light porous silica brick of the present embodiment, makes primarily of compound and animal hoof and foot protein foaming agent, and the consumption of animal hoof and foot protein foaming agent is 9% of mixture quality;
Described compound is made up of the component of following mass percent: the silica granule (SiO of 10% 2content is 98wt%), the silica fine powder (SiO of 58% 2content is 98wt%), the silicon powder (SiO of 15% 2content is 92wt%), the calcium silicate cement of 8%, the brown iron oxide of 1%, the calcium oxide powder of 3%, 3% Fluorspar Powder, the calcium lignin sulphonate of 2%.
Wherein, the particle diameter of silica granule is 0.1 ~ 3mm, the particle diameter≤0.075mm of silica fine powder, silicon powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 10:73.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the silica granule of formula ratio, silica fine powder, silicon powder, calcium silicate cement, brown iron oxide, calcium oxide powder, that stirrer for mixing put into successively by Fluorspar Powder, calcium lignin sulphonate is even, obtain compound;
2) be 1:0.85 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add the animal hoof and foot protein foaming agent of formula ratio in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 48h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 12h of loft drier of 100 DEG C, dried base substrate is put into sintering oven, is heated to 1400 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 3h, obtain light porous silica brick.
After testing, the volume density 0.5 ~ 0.6g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 74.2% ~ 78.6%, compressive strength 1.7 ~ 2.6MPa, Linear change rate 0.46% ~ 0.51% after burning, mean pore size 20.6 ~ 23.2 μm, the thermal conductivity 0.22 ~ 0.25W/ (mK) when 1100 DEG C.
Embodiment 2
The light porous silica brick of the present embodiment, makes primarily of compound and tea saponin vegetable-protein whipping agent, and the consumption of tea saponin vegetable-protein whipping agent is 3% of mixture quality;
Described compound is made up of the component of following mass percent: the silica granule (SiO of 40% 2content is 99wt%), the silica fine powder (SiO of 20% 2content is 99wt%), the silica powder (SiO of 10% 2content is 99.4wt%), the silicon powder (SiO of 10% 2content is 96wt%), the silicon sol of 10%, the brown iron oxide of 1%, the milk of lime of 5%, 3.5% Fluorspar Powder, the sodium carbonate of 0.5%.
Wherein, the particle diameter of silica granule is 0.1 ~ 3mm, the particle diameter≤0.075mm of silica fine powder, silica powder, silicon powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 40:40.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the silica granule of formula ratio, silica fine powder, silica powder, silicon powder, silicon sol, brown iron oxide, milk of lime, that Fluorspar Powder, sodium carbonate put into stirrer for mixing is successively even, obtain compound;
2) be 1:0.55 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add the tea saponin vegetable-protein whipping agent of formula ratio in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 24h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 24h of loft drier of 80 DEG C, dried base substrate is put into sintering oven, is heated to 1550 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 3h, obtain light porous silica brick.
After testing, the volume density 1.0 ~ 1.2g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 48.7% ~ 53.0%, compressive strength 9.9 ~ 14.8MPa, Linear change rate 0.12% ~ 0.17% after burning, mean pore size 6.2 ~ 8.3 μm, the thermal conductivity 0.46 ~ 0.51W/ (mK) when 1100 DEG C.
Embodiment 3
The light porous silica brick of the present embodiment, makes primarily of compound and whipping agent, and the consumption of whipping agent is 3% of mixture quality; Described whipping agent is made up of the component by following mass percent: the sodium laurylsulfonate of 20% and the ceteth sodium sulfate of 80%;
Described compound is made up of the component of following mass percent: the silica granule (SiO of 10% 2content is 98.5wt%), the useless silica brick particle (SiO of 15% 2content is 94.3wt%), the silica fine powder (SiO of 55% 2content is 98.5wt%), the calcium silicate cement of 8%, the brown iron oxide of 0.5%, the calcium oxide powder of 5%, 1% Fluorspar Powder, the tripoly phosphate sodium STPP of 0.5%, the gelatin of 5%.
Wherein, the particle diameter of silica granule, useless silica brick particle is 0.1 ~ 3mm, the particle diameter≤0.075mm of silica fine powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 25:55.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the silica granule of formula ratio, useless silica brick particle, silica fine powder, calcium silicate cement, brown iron oxide, calcium oxide powder, Fluorspar Powder, tripoly phosphate sodium STPP, that stirrer for mixing put into successively by gelatin is even, obtain compound;
2) be 1:0.60 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add sodium laurylsulfonate and the ceteth sodium sulfate of formula ratio in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 24h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 24h of loft drier of 110 DEG C, dried base substrate is put into sintering oven, is heated to 1450 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 3h, obtain light porous silica brick.
After testing, the volume density 0.8 ~ 0.9g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 61.6% ~ 65.8%, compressive strength 6.3 ~ 7.9MPa, Linear change rate 0.21% ~ 0.33% after burning, mean pore size 9.2 ~ 10.7 μm, the thermal conductivity 0.34 ~ 0.37W/ (mK) when 1100 DEG C.
Embodiment 4
The light porous silica brick of the present embodiment, makes primarily of compound and whipping agent, and the consumption of whipping agent is 6% of mixture quality; Described whipping agent is made up of the component of following mass percent: the animal hoof and foot protein foaming agent of 40%, the animal hair protein foaming agent of 10% and 20% alkylpolyoxyethylene sodium sulfate;
Described compound is made up of the component of following mass percent: the quartz particles (SiO of 20% 2content is 99.5wt%), the quartzy fine powder (SiO of 30% 2content is 99.5wt%), the silicon powder (SiO of 30% 2content is 96wt%), the silicon sol of 10%, the manganese oxide of 2%, the calcium oxide of 3.5%, 2% Fluorspar Powder, the calcium chloride of 0.5%, the calcium lignin sulphonate of 2%.
Wherein, the particle diameter of quartz particles is 0.1 ~ 3mm, the particle diameter≤0.075mm of quartzy fine powder, silicon powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 20:60.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the quartz particles of formula ratio, quartzy fine powder, silicon powder, silicon sol, manganese oxide, calcium oxide, Fluorspar Powder, that stirrer for mixing put into successively by calcium chloride, calcium lignin sulphonate is even, obtain compound;
2) be 1:0.70 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add the animal hoof and foot protein foaming agent of formula ratio, animal hair protein foaming agent and alkylpolyoxyethylene sodium sulfate in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 24h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 24h of loft drier of 110 DEG C, dried base substrate is put into sintering oven, is heated to 1550 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 3h, obtain light porous silica brick.
After testing, the volume density 0.6 ~ 0.7g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 70.1% ~ 74.4%, compressive strength 2.7 ~ 3.8MPa, Linear change rate 0.38% ~ 0.42% after burning, mean pore size 13.4 ~ 15.7 μm, the thermal conductivity 0.28 ~ 0.32W/ (mK) when 1100 DEG C.
Embodiment 5
The light porous silica brick of the present embodiment, makes primarily of compound and whipping agent, and the consumption of whipping agent is 5% of mixture quality; Described whipping agent is made up of the component of following mass percent: the animal hoof and foot protein foaming agent of 60% and the Saponin/TSM vegetable-protein whipping agent of 40%;
Described compound is made up of the component of following mass percent: the silica granule (SiO of 5% 2content is 98wt%), the silica fine powder (SiO of 50% 2content is 98wt%), the silicon powder (SiO of 15% 2content is 92wt%), the calcium silicate cement of 5%, the water glass of 11%, the manganese mineral powder (MnO of 6% 2content is 20wt%), the calcium oxide powder of 4.5%, the Fluorspar Powder of 2%, the Sodium Silicofluoride of 0.5%, 1% high-efficiency water-reducing agent of poly-carboxylic acid (BASF Corp. of Germany, 2651f).
Wherein, the particle diameter of silica granule is 0.1 ~ 3mm, the particle diameter≤0.075mm of silica fine powder, silicon powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 5:65.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the silica granule of formula ratio, silica fine powder, silicon powder, calcium silicate cement, water glass, manganese mineral powder, calcium oxide powder, Fluorspar Powder, that Sodium Silicofluoride, high-efficiency water-reducing agent of poly-carboxylic acid put into stirrer for mixing is successively even, obtain compound;
2) be 1:0.70 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add animal hoof and foot protein foaming agent and the Saponin/TSM vegetable-protein whipping agent of formula ratio in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 48h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 24h of loft drier of 90 DEG C, dried base substrate is put into sintering oven, is heated to 1430 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 5h, obtain light porous silica brick.
After testing, the volume density 0.7 ~ 0.8g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 65.9% ~ 70.1%, compressive strength 3.9 ~ 5.3MPa, Linear change rate 0.31% ~ 0.35% after burning, mean pore size 11.5 ~ 14.1 μm, the thermal conductivity 0.31 ~ 0.34W/ (mK) when 1100 DEG C.
Embodiment 6
The light porous silica brick of the present embodiment, makes primarily of compound and whipping agent, and the consumption of whipping agent is 7% of mixture quality; Described whipping agent is made up of the component of following mass percent: the animal hoof and foot protein foaming agent of 40% and the lauryl alcohol sodium sulfovinate of 60%;
Described compound is made up of the component of following mass percent: the quartz particles (SiO of 5% 2content is 99wt%), the quartzy fine powder (SiO of 62% 2content is 99wt%), the silicon powder (SiO of 10% 2content is 96wt%), the calcium silicate cement grog of 5%, the Silica hydrogel powder of 10%, the titanium oxide powder of 2%, the manganese mineral powder (MnO of 2% 2content is 60wt%), the calcium oxide of 2%, the Fluorspar Powder of 1.5%, the iron(ic) chloride of 0.2%, the hydroxyethyl ethylcellulose ether of 0.1%, 0.2% polyacrylamide.
Wherein, the particle diameter of quartz particles is 0.1 ~ 3mm, the particle diameter≤0.075mm of quartzy fine powder, silicon powder; In compound, the mass ratio of siliceous particles and siliceous fine powder is 5:72.
The preparation method of the light porous silica brick of the present embodiment, comprises the following steps:
1) get the quartz particles of formula ratio, quartzy fine powder, calcium silicate cement grog, Silica hydrogel powder, titanium oxide powder, manganese mineral powder, calcium oxide, Fluorspar Powder, iron(ic) chloride, that stirrer for mixing put into successively by hydroxyethyl ethylcellulose ether, polyacrylamide is even, obtain compound;
2) be 1:0.95 according to feed liquid mass ratio, to step 1) add water in gained compound, be uniformly mixed and make slip;
3) to step 2) add animal hoof and foot protein foaming agent and the lauryl alcohol sodium sulfovinate of formula ratio in gained slip, stir and make uniform foam slurry;
4) by step 3) gained foam slurry injection mould, room temperature leaves standstill 48h and makes its curing molding, and the rear demoulding obtains base substrate; Gained base substrate is put into the dry 72h of loft drier of 80 DEG C, dried base substrate is put into sintering oven, is heated to 1600 DEG C with the temperature rise rate of 3 DEG C/min and is incubated 3h, obtain light porous silica brick.
After testing, the volume density 0.5 ~ 0.6g/cm of the light porous silica brick of the present embodiment gained 3, apparent porosity 74.4% ~ 78.6%, compressive strength 1.9 ~ 2.7MPa, Linear change rate 0.43% ~ 0.47% after burning, mean pore size 19.8 ~ 21.3 μm, the thermal conductivity 0.24 ~ 0.27W/ (mK) when 1100 DEG C.
The raw material of the light porous silica brick of embodiment 7-9 and preparation method thereof, consumption and technical parameter are as shown in table 1, and all the other are with embodiment 1.
The raw material of the light porous silica brick of table 1 embodiment 7-9 and preparation method thereof, consumption and technical parameter table
The light porous silica brick performance test results of table 2 embodiment 7-9 gained
Project Embodiment 7 Embodiment 8 Embodiment 9
Volume density, g/cm 3 0.6～0.7 0.8～0.9 0.34～0.37
Apparent porosity, % 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
Linear change rate after burning, % 0.7～0.8 0.5～0.6 0.9～1.1
Mean pore size, μm 15.4～18.1 13.5～17.2 36.7～37.8
Thermal conductivity when 1100 DEG C, W/ (mK) 0.27～0.31 0.34～0.38 0.2～0.22

Claims (10)

1. a light porous silica brick, is characterized in that: make primarily of compound and whipping agent, and the consumption of whipping agent is 0.1% ~ 10% of mixture quality;
Described compound is made up of the component of following mass percent: siliceous material 70% ~ 95%, inorganic coagulation material 1% ~ 25%, mineralizer 0.1% ~ 15%, additive 0.1% ~ 5%; Wherein, described siliceous material is made up of siliceous particles and siliceous fine powder, and the particle diameter of siliceous particles is 0.1 ~ 3mm, the particle diameter≤0.075mm of siliceous fine powder, and the mass ratio of siliceous particles and siliceous fine powder is (1 ~ 65): (35 ~ 99).
2. light porous silica brick according to claim 1, is characterized in that: described siliceous material is any one or two or more mixtures in silica, quartz, useless silica brick, silicon powder.
3. light porous silica brick according to claim 2, is characterized in that: SiO in described silica 2mass percentage>=97%; SiO in described quartz 2mass percentage>=98%; SiO in described useless silica brick 2mass percentage>=92%, and the addition of useless silica brick is not more than 40% of compound total mass; SiO in described silicon powder 2mass percentage>=92%.
4. light porous silica brick according to claim 1, is characterized in that: described inorganic coagulation material is any one or two or more mixtures in calcium silicate cement, calcium silicate cement grog, Dicalcium Phosphate (Feed Grade), tricalcium silicate, silicon sol, Silica hydrogel, water glass.
5. light porous silica brick according to claim 1, is characterized in that: described mineralizer is ferric oxide, potassium oxide, sodium oxide, calcium oxide, magnesium oxide, milk of lime, fluorite, Calcium Fluoride (Fluorspan), calcium carbonate, titanium oxide, manganese oxide, MnO 2any one or two or more mixtures in the manganese mineral powder of mass content>=20%; Particle diameter≤the 0.088mm of described mineralizer.
6. light porous silica brick according to claim 1, it is characterized in that: described additive is calcium chloride, iron(ic) chloride, Tai-Ace S 150, calcium sulfate, Quilonum Retard, calcium lignin sulphonate, sodium lignosulfonate, acrylamide, polyacrylamide, ammonium polyacrylate, polyoxyethylene glycol, polyvinyl alcohol, trolamine, carboxymethyl cellulose, Xylo-Mucine, methyl cellulose ether, Natvosol, hydroxyethyl ether cellulose, ethoxyl methyl cellulose ether, hydroxyethyl ethylcellulose ether, gelatin, gum arabic, Sodium Silicofluoride, sodium carbonate, Sodium hexametaphosphate 99, tripoly phosphate sodium STPP, any one or two or more mixtures in high-efficiency water-reducing agent of poly-carboxylic acid.
7. light porous silica brick according to claim 1, is characterized in that: the alkyl-sulphate that the alkylsulfonate that described whipping agent is animal protein foaming agent, vegetable-protein whipping agent, laureth sodium sulfovinate, lauryl alcohol sodium sulfovinate, sodium lauroyl sareosine, carbon chain lengths are 8 ~ 20, carbon chain lengths are 8 ~ 20, a-alkenyl sulphonate, carbon chain lengths are any one or two or more mixtures in the fatty alcohol ether sulphate of 12 ~ 18.
8. a preparation method for light porous silica brick as claimed in claim 1, is characterized in that: comprise the following steps:
1) get the siliceous particles of formula ratio, siliceous fine powder, inorganic coagulation material, mineralizer, additive mix, obtain compound;
2) be 1:(0.25 ~ 2 according to feed liquid mass ratio), to step 1) add water in gained compound, be mixed and made into slip;
3) to step 2) add the whipping agent of formula ratio in gained slip, mix and make foam slurry;
4) by step 3) gained foam slurry injects mould, and room temperature leaves standstill and makes the demoulding after its curing molding, and drying is also burnt till, and to obtain final product.
9. the preparation method of light porous silica brick according to claim 8, is characterized in that: step 4) in, the temperature of described drying is 50 ~ 110 DEG C, and the time is 12 ~ 48h.
10. the preparation method of light porous silica brick according to claim 8, is characterized in that: step 4) in, described in the temperature of burning till be 1350 ~ 1650 DEG C, soaking time is 3 ~ 60h.
CN201510928913.4A 2015-12-11 2015-12-11 Micropore light weight silica brick and preparation method thereof Pending CN105565850A (en)

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CN106747488A (en) * 2016-11-03 2017-05-31 联合矿产（天津）有限公司 By stabilized fire proofing composition
CN107188587A (en) * 2017-07-19 2017-09-22 郑州安耐克实业有限公司 The siliceous dry type ramming material of lightweight for hot-blast stove heat-insulation and heat-preservation
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US11667573B2 (en) * 2017-11-21 2023-06-06 Solidia Technologies, Inc Compositions and method to improve the strength development of calcium silicate-based cements and concretes
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