CN106116543B - A kind of preparation method of refractory brick capable of purifying air - Google Patents

A kind of preparation method of refractory brick capable of purifying air Download PDF

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CN106116543B
CN106116543B CN201610520097.8A CN201610520097A CN106116543B CN 106116543 B CN106116543 B CN 106116543B CN 201610520097 A CN201610520097 A CN 201610520097A CN 106116543 B CN106116543 B CN 106116543B
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raw material
adobe
fine powder
refractory brick
jelly
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CN106116543A (en
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董苏荣
曹林慧
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Zhejiang Rongxing New Material Technology Co.,Ltd.
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Zhejiang Kang Xingxin Materials Polytron Technologies Inc
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    • 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
    • C04B35/10—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 aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D—SEPARATION
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
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    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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Abstract

The invention discloses a kind of preparation methods of refractory brick capable of purifying air, raw material is prepared using stalk as activated carbon, it is at low cost, effect is good, the preparation process of activated carbon is incorporated in the preparation process of refractory brick simultaneously, reduce sintering time, can effectively reduce energy consumption, whole preparation process meets National Sustainable Development Strategies requirement.

Description

A kind of preparation method of refractory brick capable of purifying air
Technical field
The present invention relates to technical field of refractory materials more particularly to a kind of preparation methods of refractory brick capable of purifying air.
Background technology
Haze, as the term suggests it is mist and haze.But the difference of mist and haze is very big.Dust, sulfuric acid, nitric acid in air etc. What the aerosol systems of grain object composition caused dysopia is haze.Haze is exactly gray haze (mist and clouds in the twilight).
The aerosol systems that mist is made of the small water droplet or ice crystal that are largely suspended in surface air.It comes across more Autumn and winter is the product of condensation vapor (or sublimating) in ground layer air.The presence of mist can reduce air transparency, enable Degree of opinion deteriorates, if the horizontal visibility of object is reduced within 1000 meters, the steam that will just be suspended in surface air The weather phenomenon of condensation (or sublimating) object is known as mist (Fog).
The particles such as dust, sulfuric acid, nitric acid, organic hydrocarbon compounds in haze, also referred to as gray haze (smog) air can also make greatly Gas is muddy.The horizontal visibility of object is known as mist or mist (Mist) in this phenomenon of 1000~ten thousand metres.Form mist When atmospheric humidity should be saturation (in the presence of a large amount of nuclei of condensation, relative humidity, which not necessarily reaches 100%, to be occurred Saturation).The light and wavelength relationship of the mist scattering formed due to liquid water or ice crystal are little, thus mist seems to be creamy white or blueness White and grey.
Haze weather is a kind of atmosphere pollution state, and haze is exceeded to various suspended particulate substance contents in air general Statement, especially PM2.5 (equivalent aerodynamic diameter is less than or equal to 2.5 microns of particulate matter) is considered as causing haze sky " arch-criminal " of gas.With the deterioration of air quality, thick weather phenomenon increases, and harm aggravates.Chinese many areas are cloudy Haze weather phenomenon is incorporated to mist together as diastrous weather early-warning and predicting.It is referred to as " haze weather ".
Air in city includes a large amount of pollutants such as gas, dust, recent years, straight in PM2.5, that is, air Diameter is less than or equal to 2.5 microns of particulate matter, obtains extensive concern.It is numerous to study from different aspect explanation, lung cancer and respiratory tract The death rate of disease can increase with the increase of PM2.5.But with the complication of monitoring means, the pollutant shadow of lower concentration Sound is found, and part researcher gradually recognizes that air pollution is not only related with respiratory disease death, conscious by focus Bet getting in touch between air pollution and health of heart.
Invention content
Technical problems based on background technology, the present invention propose a kind of method of refractory brick capable of purifying air, The PM2.5 in air is effectively reduced, atmosphere pollution environmental improvement is conducive to.
The present invention proposes a kind of preparation method of refractory brick capable of purifying air, comprises the steps of：
Step 1：By stalk, mechanical crushing crosses 120 mesh sieve, obtains straw powder to powdery repeatedly；
Step 2：After adding water to stir evenly straw powder and alumina fine powder, the jelly of viscosity 500-2000cps is made；
Step 3：Water is added to add successively in proportion nitridation silica fine powder, corundum fine powder, clay, mullite fine powder, alumina fine powder Enter in blender and stir, after stirring evenly, adobe raw material for standby is made；
Step 4：The 10% of adobe material quality is added in mold, puts on a vibration table, is uniformly molded after 3 minutes, this When adobe raw material thickness in mold be about 2-3cm, then smear straw powder that a layer thickness is 3-5mm and alumina fine powder be gluey Object adds 10% adobe raw material, smears one layer of jelly, is only added to adobe raw material；At this point, the unfired brick structure in mold It is adobe raw material for upper and lower outer layer, internal layer is adobe raw material and jelly alternating structure；
Step 5：Adobe after molding is put into brickkiln, one kiln adobe of codes is waited, it is even from room temperature under the protection of nitrogen Speed is warming up to 1200 DEG C, heating-up time 1-2h, and keeps high temperature sintering 2-3h, then passes to air and continues to be sintered 5-8h, stops After fire heat preservation 5h, kiln discharge is cooling and then obtains refractory brick.
Preferably, straw powder and the weight percent of alumina fine powder and water are 50-70: 25-35 in the step 2: 10-25。
Preferably, the grain size of the base brick raw material in the step 3 and weight percent include：
Preferably, in the corundum aluminium oxide content >=85%, content >=72%, two of aluminium oxide in the mullite Content >=23% of silica.
The raw material for preparing using stalk as activated carbon, can not only reduce cost, be also prevented from crop straw burning, favorably In atmosphere pollution comprehensive environmental improvement.
Directly the preparation process of activated carbon is incorporated in the preparation process of refractory brick, reduces sintering time, it can be effective Reduce energy consumption.
Titanium dioxide is not only a kind of detergent of Environmental security, and can rise as the catalyst of optical coating pigment There is the effect of environmental protection resource to saving energy.Early stage Japan and Britain scientist by titanium dioxide-coated in city horse The paving stone surface on road, to clean road surface air.Titanium dioxide can be mixed with pitch, reduce the pollutant in air.When When automobile passes through, concrete or pitch containing titanium dioxide can purify air, eliminate 25% to 45% in vehicle emission Nitrogen oxides.By titanium dioxide-coated on concrete surface, the effect of scavenging air is equally notable.
The mode that layered adsorption may be used in the refractory brick of preparation effectively adsorbs the particulate matter in air, absorption effect Fruit is good and persistently, simultaneously because add Nano titanium dioxide, can be played to pernicious gases such as sulfur dioxide in air The effect of photocatalytic degradation.
This programme is beneficial in that compared to traditional scheme：The present invention uses stalk former as the preparation of activated carbon Material, activated carbon play the role of adsorbing air small particles, the pernicious gas in titanium dioxide purification air are added, while will live Property charcoal preparation process incorporate refractory brick preparation process in, reduce sintering time, can effectively reduce energy consumption, cost Low, effect is good, and whole preparation process meets National Sustainable Development Strategies requirement.
Specific implementation mode
Embodiment 1：
The present invention proposes a kind of preparation method of refractory brick capable of purifying air, comprises the steps of：
Step 1：By stalk, mechanical crushing crosses 120 mesh sieve, obtains straw powder to powdery repeatedly；
Step 2：After adding water to stir evenly straw powder and alumina fine powder, the glue that viscosity is 500-2000cps is made Object；
Step 3：Water is added to add successively in proportion nitridation silica fine powder, corundum fine powder, clay, mullite fine powder, alumina fine powder Enter in blender and stir, after stirring evenly, adobe raw material for standby is made；
Straw powder is 60 with the weight percent of alumina fine powder and water：25：15；
Step 4：The 10% of adobe material quality is added in mold, puts on a vibration table, is uniformly molded after 3 minutes, this When adobe raw material thickness in mold be about 2cm, then smear straw powder and alumina fine powder jelly that a layer thickness is 3mm, 10% adobe raw material is added, one layer of jelly is smeared, is only added to adobe raw material；At this point, the unfired brick structure in mold is Upper and lower outer layer is adobe raw material, and internal layer is adobe raw material and jelly alternating structure；
The grain size and weight percent of base brick raw material in the step 3 include：
The purity of the silicon carbide is 95% or more, content >=85% of aluminium oxide in corundum, is aoxidized in the mullite Content >=72% of aluminium, content >=23% of silica.
Step 5：Adobe after molding is put into brickkiln, one kiln adobe of codes is waited, it is even from room temperature under the protection of nitrogen Speed is warming up to 1200 DEG C, heating-up time 1.5h, and keeps high temperature sintering 2h, then passes to air and continues to be sintered 6h, ceases fire and protect After warm 5h, kiln discharge is cooling and then obtains refractory brick.
Embodiment 2：
The present invention proposes a kind of preparation method of refractory brick capable of purifying air, comprises the steps of：
Step 1：By stalk, mechanical crushing crosses 120 mesh sieve, obtains straw powder to powdery repeatedly；
Step 2：After adding water to stir evenly straw powder and alumina fine powder, the glue that viscosity is 500-2000cps is made Object；
Step 3：Water is added to add successively in proportion nitridation silica fine powder, corundum fine powder, clay, mullite fine powder, alumina fine powder Enter in blender and stir, after stirring evenly, adobe raw material for standby is made；
Straw powder is 50 with the weight percent of alumina fine powder and water：30：20；
Step 4：The 10% of adobe material quality is added in mold, puts on a vibration table, is uniformly molded after 3 minutes, this When adobe raw material thickness in mold be about 2.5cm, then smear straw powder that a layer thickness is 3mm and alumina fine powder be gluey Object adds 10% adobe raw material, smears one layer of jelly, is only added to adobe raw material；At this point, the unfired brick structure in mold It is adobe raw material for upper and lower outer layer, internal layer is adobe raw material and jelly alternating structure；
The grain size and weight percent of base brick raw material in the step 3 include：
Content >=85% of aluminium oxide in the corundum, content >=72% of aluminium oxide, silica in the mullite Content >=23%.
Step 5：Adobe after molding is put into brickkiln, one kiln adobe of codes is waited, it is even from room temperature under the protection of nitrogen Speed is warming up to 1200 DEG C, heating-up time 1h, and keeps high temperature sintering 2.5h, then passes to air and continues to be sintered 5h, ceases fire and protect After warm 5h, kiln discharge is cooling and then obtains refractory brick.
Embodiment 3：
The present invention proposes a kind of preparation method of refractory brick capable of purifying air, comprises the steps of：
Step 1：By stalk, mechanical crushing crosses 120 mesh sieve, obtains straw powder to powdery repeatedly；
Step 2：After adding water to stir evenly straw powder and alumina fine powder, the glue that viscosity is 500-2000cps is made Object；
Step 3：Water is added to add successively in proportion nitridation silica fine powder, corundum fine powder, clay, mullite fine powder, alumina fine powder Enter in blender and stir, after stirring evenly, adobe raw material for standby is made；
Straw powder is 65 with the weight percent of alumina fine powder and water：25：10；
Step 4：The 10% of adobe material quality is added in mold, puts on a vibration table, is uniformly molded after 3 minutes, this When adobe raw material thickness in mold be about 3cm, then smear straw powder and alumina fine powder jelly that a layer thickness is 4mm, 10% adobe raw material is added, one layer of jelly is smeared, is only added to adobe raw material；At this point, the unfired brick structure in mold is Upper and lower outer layer is adobe raw material, and internal layer is adobe raw material and jelly alternating structure；
The grain size and weight percent of base brick raw material in the step 3 include：
Content >=85% of aluminium oxide in the corundum, content >=72% of aluminium oxide, silica in the mullite Content >=23%.
Step 5：Adobe after molding is put into brickkiln, one kiln adobe of codes is waited, it is even from room temperature under the protection of nitrogen Speed is warming up to 1200 DEG C, heating-up time 1.5h, and keeps high temperature sintering 1.5h, then passes to air and continues to be sintered 7h, ceases fire After keeping the temperature 5h, kiln discharge is cooling and then obtains refractory brick.
Embodiment 1-3 is detected：
This detection data is just for above-mentioned detection sample.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (2)

1. a kind of preparation method of refractory brick capable of purifying air, which is characterized in that comprise the steps of：
Step 1：By stalk, mechanical crushing crosses 120 mesh sieve, obtains straw powder to powdery repeatedly；
Step 2：After adding water to stir evenly straw powder and alumina fine powder, the jelly of viscosity 500-2000cps is made；
Step 3：Nitridation silica fine powder, corundum fine powder, clay, mullite fine powder, alumina fine powder, nano titanium dioxide are pressed Ratio is sequentially added in blender and is stirred, and after stirring evenly, adobe raw material for standby is made；
Step 4：The 10% of adobe material quality is added in mold, puts on a vibration table, is uniformly molded after 3 minutes, at this time brick Base raw material thickness in mold is about 2-3cm, then smears straw powder and alumina fine powder jelly that a layer thickness is 3-5mm, 10% adobe raw material is added, one layer of jelly is smeared, is only added to adobe raw material；At this point, the unfired brick structure in mold is upper Lower outer layer is adobe raw material, and internal layer is adobe raw material and jelly alternating structure；
Step 5：Adobe after molding is put into brickkiln, one kiln adobe of codes is waited, is at the uniform velocity risen from room temperature under the protection of nitrogen Temperature keeps high temperature sintering 2-3h to 1200 DEG C, heating-up time 1-2h, then passes to air and continues to be sintered 5-8h, ceases fire and protect After warm 5h, kiln discharge is cooling and then obtains refractory brick；
Straw powder and the weight percent of alumina fine powder and water are 50-70 in the step 2：25-35：10-25；
The grain size and weight percent of base brick raw material in the step 3 include：
Clay 2-3%
120 mesh 4-7% of silicon carbide
120 mesh 30-45% of corundum
200 mesh 5-8% of alumina fine powder
120 mesh 10-15% of mullite
Nano-titanium dioxide 0.5-2%
Surplus is water.
2. the preparation method of refractory brick capable of purifying air as described in claim 1, which is characterized in that aoxidized in the corundum Content >=85% of aluminium, content >=72% of aluminium oxide, content >=23% of silica in the mullite.
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