CN102166784A - Production method for forming attapulgite porous ceramic by pressing method - Google Patents
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- CN102166784A CN102166784A CN 201010562445 CN201010562445A CN102166784A CN 102166784 A CN102166784 A CN 102166784A CN 201010562445 CN201010562445 CN 201010562445 CN 201010562445 A CN201010562445 A CN 201010562445A CN 102166784 A CN102166784 A CN 102166784A
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Abstract
The invention discloses a production method for forming attapulgite porous ceramic by a pressing method. The key point of the technical scheme is that: the method comprises the following steps of: mixing ingredients, stirring, standing, pressing the stood blank into an attapulgite porous ceramic blank, naturally drying, slowly drying, firing at an intermediate temperature, firing at an intermediate and high temperature, and firing at a high temperature; and slowly cooling the fired blank, and packaging to obtain a finished product of the attapulgite porous ceramic. The ingredients for forming the attapulgite porous ceramic by the pressing method consist of attapulgite clay, calcined clay, kieselguhr, plant straw powder, coal particles, superfine polyvinyl alcohol powder, sodium carbonate, lauryl sodium sulfate and water. The production method for forming the attapulgite porous ceramic by the pressing method integrates a pore-forming method, a foaming method and a gel method; the pore volume of a porous ceramic product formed and produced by using the attapulgite porous ceramic through the pressing method can be over 55 percent of total volume; and the production method is suitable for the large-scale mechanized production of the porous ceramic product.
Description
Technical field
The present invention relates to ceramic, be specifically related to the production method that a kind of concavo-convex excellent porous ceramics pressing is shaped.
Background technology
Development along with science and technology and suitability for industrialized production, problems such as the energy, resource, the disposal of three wastes come into one's own more, porous ceramic film material because have that porosity height, air permeance resistance are little, controllable bore diameter, cleaning and regeneration is convenient and characteristics such as high temperature resistant, high pressure, resistant to chemical media corrosion, be used widely in fields such as oil, chemical industry, pharmacy, food, environmental protection and water treatments at present.Especially high-tech sectors such as biochemical industry, fine chemistry industry, energy and material develops rapidly, liquid, solid Research of Separation Technique and exploitation are proposed higher requirement, and high score more and more causes people's attention from the porous filtering technology and the porous ceramics filtering material of precision, high operational efficiency.
The ceramic body that the pressing shaping is produced requires moisture low, the base substrate densification, dry contraction is little, accurate and the quality height of the geomery of product, in common ceramic process, be easy to reach above-mentioned condition, but for producing the porous ceramics product, not only require the natural generating portion pore of energy in the base substrate manufacturing process, also to avoid the too high meeting of sintering temperature to make part holes sealing or disappearance, sintering temperature is too low, cause the intensity of ceramic product low, therefore raw and auxiliary material and the production method to porous ceramics has strict requirement, need take into account the porosity and the intensity of ceramic product.
Summary of the invention
The objective of the invention is to overcome weak point in the prior art, the production method that provides a kind of concavo-convex excellent porous ceramics pressing to be shaped.
The production method that concavo-convex excellent porous ceramics pressing is shaped is: will stir after the batch mixes and leave standstill earlier, blank after leaving standstill is pressed into the base substrate of concavo-convex excellent porous ceramics, and carry out air dry, slowly oven dry, middle temperature are burnt till, middle high temperature burns till with high temperature and burn till the stage, base substrate after burning till slowly cools off, and is packaged as the finished product of concavo-convex excellent porous ceramics.
The batching that concavo-convex excellent porous ceramics pressing is shaped is made up of Concave-convex clay rod, ripe flint clay, diatomite, plant stalk powder, coal grain, micronized polyethylene alcohol powder, sodium carbonate, lauryl sodium sulfate and water.
Concave-convex clay rod be a kind of layer of chain structure contain Shuifu County's zeopan clay mineral, crystal is needle-like, fibrous or fiber collection shape because the inner porous of Concave-convex clay rod road, specific surface is big, can reach 500m
2More than/the g, help improving the porosity in the porous ceramic articles.
Concave-convex clay rod soil property exquisiteness has oily soapy, and light weight, property are crisp, and fracture is conchoidal or irregular shape, and water imbibition is strong, tool viscosity and plasticity when wet, and its viscosity can reach more than the 3000mPas, helps the bonding between the raw material; Magnesia in the Concave-convex clay rod can weaken in the ceramic base substrate because the yellow that Fe and Ti compound are produced, and promotes the translucence of porcelain base, improves the mechanical strength of base substrate.
Concave-convex clay rod has unique dispersive property, suspension is met dielectric and do not produced flocculation sediment, and dry after-contraction is little, does not produce be full of cracks, and has good, the high temperature resistant and anti-good properties such as saline and alkaline of thixotropy;
Also contain a spot of hydromica, quartz, feldspar, kaolinite, sepiolite and opal in the Concave-convex clay rod, these compositions are used for developing concavo-convex excellent expensive goods and belong to the impurity class, be to need to get rid of through the screening of purifying, and in the present invention, these compositions are the plasticity that helps regulating concavo-convex excellent porous china clay in powder, reduce the drying of base substrate and shrink, shorten drying time and prevent blank deformation.
Flint clay is the multiple mixture that contains aluminosilicate, main chemical compositions is silica and two kinds of oxides of alundum (Al, ripe flint clay is that the flint clay raw ore forms after high-temperature calcination, ripe flint clay whiteness and luminosity are good, it is even to have quality, compact structure, volume stability, refractory temperature high strength is big, in water, be difficult for disperseing, plasticity is hanged down and characteristics such as water absorption rate is little, ripe in the present invention flint clay is used for improving the content of the alundum (Al of concavo-convex excellent porous china clay in powder, it is low to avoid into the porcelain temperature, reduce the distortion that porous ceramic articles produces when burning till, can prevent that also porous ceramic articles from producing the atrophy in aperture in sintering process.
Diatomaceous mineral composition mainly is opal and mutation thereof, secondly is clay mineral-hydromica, kaolinite and mineral chip, and quartz, feldspar, biotite and organic matter etc. are arranged in the mineral chip; Diatomite has exquisiteness, loose, light weight, porous, water imbibition and the strong characteristics of permeability, helps improving porous ceramic articles mesopore rate.
Sodium carbonate is used for that in the present invention concavo-convex excellent porous china clay in powder batching is carried out sodium modification to be handled, and can improve the plasticity and the adhesive property of concavo-convex excellent porous china clay in powder.
Plant stalk powder is the flour of wearing into after being dried by timber leftover bits and pieces, paddy rice, wheat, rape, seeding corn and other crops straw and accessory substance, be a kind of pore creating material in the present invention, use concavo-convex excellent porous china clay in powder to make the base substrate of porous ceramics, plant stalk powder in sintering process in the base substrate stays less pore after producing the burning volatilization in base substrate.
The coal grain adopts stone coal to pulverize, and is a kind of pore creating material in the present invention, uses concavo-convex excellent porous china clay in powder to make the base substrate of porous ceramics, and the coal grain in sintering process in the base substrate stays bigger pore after producing the burning volatilization in base substrate.
Micronized polyethylene alcohol powder is soluble in water, is a kind of plasticizer in the present invention, helps increasing the caking property and the plasticity of concavo-convex excellent porous china clay in powder, and can improve the emulsification and the foaming effect of lauryl sodium sulfate.
Lauryl sodium sulfate is white powder, and is soluble in water, has good emulsifying, foaming, infiltration, decontamination and dispersive property, foam is abundant, the characteristics that biodegradation is fast are a kind of blowing agent in the present invention, are used to increase the porosity of concavo-convex excellent porous china clay in powder.
The present invention is achieved by following technical proposals:
1, the production method of concavo-convex excellent porous ceramics pressing shaping is: stir after the batch mixes that (1) is shaped concavo-convex excellent porous ceramics pressing earlier, the moistening blank in back that stirs need leave standstill 10～60 minutes; (2) blank after will leaving standstill adds the base substrate that is pressed into concavo-convex excellent porous ceramics in the mould, and base substrate changed over to carries out air dry in the base substrate shed; (3) change in the low temperature oven after base substrate moisture is less than 15% and slowly dry, bake out temperature is controlled at 80～150 ℃, and drying time was controlled at 2～4 hours; (4) base substrate after will drying changes in the kiln, temperature is burnt till the stage in being introduced into, firing temperature is controlled at 150～450 ℃, firing time was controlled at 1～4 hour, high temperature burns till the stage in entering again, firing temperature is controlled at 450～950 ℃, firing time was controlled at 1～2 hour, enter high temperature at last and burn till the stage, firing temperature is controlled at 950～1300 ℃, firing time was controlled at 30～60 minutes, and the base substrate after burn till (5) slowly cools off, and was cooled to the finished product that is packaged as concavo-convex excellent porous ceramics after the room temperature;
The batching that concavo-convex excellent porous ceramics pressing is shaped is made up of following component by weight percentage: concavo-convex excellent porous china clay in powder 70～92% and water 8～30%;
The production method of described concavo-convex excellent porous china clay in powder is: pulverize in (1) raw material mixing back input pulverizer with concavo-convex excellent porous china clay in powder, the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 1～10 day; (3) will be pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 2～10 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.074 millimeter, (7) will stir in the input mixer after the batch mixes of concavo-convex excellent porous china clay in powder, the back that stirs is concavo-convex excellent porous china clay in powder;
The raw-material batching of described concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 45～65%, ripe flint clay 5～35%, diatomite 5～20%, plant stalk powder 2～15% and sodium carbonate 0.1～3%;
The batching that described immersion sodium is handled is made up of following component by weight percentage: mixture 55～75% after the pulverizing and water 25～45%;
The batching of described concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: the powder 80～95% behind the abrasive dust, coal grain 2～15%, micronized polyethylene alcohol powder 0.01～3% and lauryl sodium sulfate 0.01～3%;
The grain fineness of described plant stalk powder is less than 0.25 millimeter, and the grain fineness of coal grain is less than 5 millimeters.
After the raw material of concavo-convex excellent porous china clay in powder are handled, are pressed into tablet and are squeezed into bar through the immersion sodium, its internal microstructure is by " bulking ", and form micro-gap and crack, thereby moisture is entered wherein easily, cause microstructural hydration swelling, so that the dispersion of under weak dispersion condition, just can in medium, disintegrating, form viscosity higher, thixotropy also obviously strengthens, can also strengthen the old effect of concavo-convex excellent porous china clay in powder, improve the osmotic pressure of ion between the china clay in powder particle, improve the plasticity of concavo-convex excellent porous china clay in powder.
The production method that concavo-convex excellent porous ceramics pressing is shaped is that collection pore-creating, foaming and gel method are the production method of one, the porous ceramics product that uses concavo-convex excellent porous ceramics pressing to be shaped and to produce, the pore volume can reach more than 55% of cumulative volume, have that porosity height, air permeance resistance are little, controllable bore diameter, cleaning and regeneration is convenient and characteristics such as high temperature resistant, high pressure, resistant to chemical media corrosion, the size in porous ceramics product aperture can be adjusted the grain fineness and the lauryl sodium sulfate use amount of the powder behind the abrasive dust, coal grain as required.
Concavo-convex excellent porous china clay in powder has caking property, plasticity preferably, thixotropy, fire resistance and heat endurance, have also that shrinkage factor is little, indeformable, intensity is good and the characteristics of quality homogeneous, the porous ceramic articles after guaranteeing to burn till has the higher porosity and good intensity
The production method that concavo-convex excellent porous ceramics pressing is shaped is applicable to mechanization large-scale production porous ceramic articles.
The specific embodiment
The invention will be further described below in conjunction with embodiment:
1, the production method of concavo-convex excellent porous ceramics pressing shaping is: stir after the batch mixes that (1) is shaped concavo-convex excellent porous ceramics pressing earlier, the moistening blank in back that stirs need leave standstill 30 minutes; (2) blank after will leaving standstill adds the base substrate that is pressed into concavo-convex excellent porous ceramics in the mould, and base substrate changed over to carries out air dry in the base substrate shed; (3) change in the low temperature oven after base substrate moisture is less than 15% and slowly dry, bake out temperature is controlled at 80～150 ℃, and drying time was controlled at 3 hours; (4) base substrate after will drying changes in the kiln, temperature is burnt till the stage in being introduced into, and firing temperature is controlled at 150～450 ℃, and firing time was controlled at 2 hours, high temperature burns till the stage in entering again, firing temperature is controlled at 450～950 ℃, and firing time was controlled at 1 hour, enters high temperature at last and burns till the stage, firing temperature is controlled at 950～1300 ℃, firing time was controlled at 40 minutes, and the base substrate after burn till (5) slowly cools off, and was cooled to the finished product that is packaged as concavo-convex excellent porous ceramics after the room temperature.
The batching that concavo-convex excellent porous ceramics pressing is shaped is made up of following component by weight percentage: concavo-convex excellent porous china clay in powder 75% and water 25%
The production method of described concavo-convex excellent porous china clay in powder is: pulverize in (1) raw material mixing back input pulverizer with concavo-convex excellent porous china clay in powder, the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 5 days; (3) will be pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 6 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.074 millimeter, (7) will stir in the input mixer after the batch mixes of concavo-convex excellent porous china clay in powder, the back that stirs is concavo-convex excellent porous china clay in powder;
The raw-material batching of concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 58%, ripe flint clay 22%, diatomite 12%, plant stalk powder 6.5% and sodium carbonate 1.5%;
Soaking the batching of sodium processing is made up of following component by weight percentage: mixture 65% after the pulverizing and water 35%;
The batching of concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: the powder 85% behind the abrasive dust, coal grain 14%, micronized polyethylene alcohol powder 0.7% and lauryl sodium sulfate 0.3%;
The grain fineness of described plant stalk powder is less than 0.25 millimeter, and the grain fineness of coal grain is less than 3 millimeters.
Claims (1)
1. the production method that concavo-convex excellent porous ceramics pressing is shaped is characterized in that, stirs after the batch mixes that (1) is shaped concavo-convex excellent porous ceramics pressing earlier, and the moistening blank in back that stirs need leave standstill 10～60 minutes; (2) blank after will leaving standstill adds the base substrate that is pressed into concavo-convex excellent porous ceramics in the mould, and base substrate changed over to carries out air dry in the base substrate shed; (3) change in the low temperature oven after base substrate moisture is less than 15% and slowly dry, bake out temperature is controlled at 80～150 ℃, and drying time was controlled at 2～4 hours; (4) base substrate after will drying changes in the kiln, temperature is burnt till the stage in being introduced into, firing temperature is controlled at 150～450 ℃, firing time was controlled at 1～4 hour, high temperature burns till the stage in entering again, firing temperature is controlled at 450～950 ℃, firing time was controlled at 1～2 hour, enter high temperature at last and burn till the stage, firing temperature is controlled at 950～1300 ℃, firing time was controlled at 30～60 minutes, and the base substrate after burn till (5) slowly cools off, and was cooled to the finished product that is packaged as concavo-convex excellent porous ceramics after the room temperature;
The batching that concavo-convex excellent porous ceramics pressing is shaped is made up of following component by weight percentage: concavo-convex excellent porous china clay in powder 70～92% and water 8～30%;
The production method of described concavo-convex excellent porous china clay in powder is: pulverize in (1) raw material mixing back input pulverizer with concavo-convex excellent porous china clay in powder, the compound particles fineness after the pulverizing is less than 0.25 millimeter; (2) mixture after will pulverizing adds in the fermentation vat water and soaks sodium and be treated to moistening shape mixture, soaks the sodium time to be controlled at 1～10 day; (3) will be pressed into tablet in the moistening shape mixture input twin rollers, the thickness of tablet is less than 3 millimeters; (4) tablet is imported be squeezed into cylindrical strip thing in the vacuum-extruder, the diameter of cylindrical strip thing is controlled at 2～10 millimeters, and (5) are input to the cement threshing ground with cylindrical strip thing and carry out airing, and the cylindrical strip thing water content after the airing is less than 15%; (6) will carry out abrasive dust in the cylindrical strip thing input grinding machine after the airing, particles of powder fineness behind the abrasive dust is less than 0.074 millimeter, (7) will stir in the input mixer after the batch mixes of concavo-convex excellent porous china clay in powder, the back that stirs is concavo-convex excellent porous china clay in powder;
The raw-material batching of described concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: Concave-convex clay rod 45～65%, ripe flint clay 5～35%, diatomite 5～20%, plant stalk powder 2～15% and sodium carbonate 0.1～3%;
The batching that described immersion sodium is handled is made up of following component by weight percentage: mixture 55～75% after the pulverizing and water 25～45%;
The batching of described concavo-convex excellent porous china clay in powder is made up of following component by weight percentage: the powder 80～95% behind the abrasive dust, coal grain 2～15%, micronized polyethylene alcohol powder 0.01～3% and lauryl sodium sulfate 0.01～3%;
The grain fineness of described plant stalk powder is less than 0.25 millimeter, and the grain fineness of coal grain is less than 5 millimeters.
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| CN110014511A (en) * | 2019-05-08 | 2019-07-16 | 辽宁罕王绿色建材有限公司 | A kind of distributing method producing light foamed ceramic partition plate |
| CN110105009A (en) * | 2018-02-01 | 2019-08-09 | 广东清大同科环保技术有限公司 | A kind of permeable drainpipe |
| CN114149248A (en) * | 2021-11-05 | 2022-03-08 | 东莞哈珀科技有限公司 | Porous ceramic material, preparation method thereof, heating assembly, atomizer and electronic cigarette |
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Application publication date: 20110831 |