CN102531395A - Method for producing microcrystal hollow spheres - Google Patents
Method for producing microcrystal hollow spheres Download PDFInfo
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- CN102531395A CN102531395A CN2011104469490A CN201110446949A CN102531395A CN 102531395 A CN102531395 A CN 102531395A CN 2011104469490 A CN2011104469490 A CN 2011104469490A CN 201110446949 A CN201110446949 A CN 201110446949A CN 102531395 A CN102531395 A CN 102531395A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention relates to a method for producing microcrystal hollow spheres, which aims at producing a novel energy-saving environment-friendly microcrystal hollow sphere by utilizing resourceful minerals reasonably through simple processing according to a formula of specific components and on conditions of a specific temperature system and production technology. The wall of the sphere is made of complex-phase solid materials composed of glass-phase materials and crystal-phase materials, and the method can be popularized in and applied to multiple fields including energy saving, thermal insulation, sound absorption, noise control, corrosion and moisture resistance, thermal and frost resistance, high-temperature thermal insulation, low-temperature heat preservation, moisture-proof projects, sound absorption projects and the like in life. The method for producing microcrystal hollow spheres is suitable for industrialized batch production, greatly reduces crystallization temperature, shortens crystallization thermal insulation time, improves labor productivity, saves energy, comprehensively and effectively uses resources and further remarkably reduces product cost and the like.
Description
Technical field:
The crystallite hollow ball is a kind of silicate product among the present invention, belongs to the building materials industry product, particularly relates to a kind of working method of crystallite hollow ball.
Background technology:
The hollow ball of domestic production is mainly used in the refractory materials aspect, and generally as lightweight structural material, heat insulation, sound insulation and electrically insulating material etc., common have alumina hollow ball and a zirconium white hollow ball.The former alumina content reaches more than 99%, and refractoriness approaches 2000 ℃, and natural tap density is 0.8～1.2g/cm3, and thermal conductivity is very low; The latter's the ZIRCONIUM DIOXIDE 99.5 and the content of quicklime>98%, refractoriness is greater than 2200 ℃, and thermal conductivity is lower.Alumina hollow ball is raw material with the commercial alumina, is melt into liquid state with the superpower electric furnace, dispels into the hollow ball that diameter does not wait with pressurized air or steam again; Perhaps process spheroid with organism such as resins; Spray cakingagent then, on spherical shell, stick one deck aluminum oxide fine powder again, through drying with after burning till; Organism burns and loses, and housing sinters hollow ball into.Equally, the zirconium white hollow ball is a raw material with industrial zirconium white, adds small amounts calcium used as stabilizers, mixes, and becomes liquation through electric smelting, and production technique is similar with alumina hollow ball.These two kinds of hollow balls are the thermostable heat insulation material, can be used as the raw material of making insulating product or the thermofin that directly is used as high temperature kiln with the shape material that looses.
The crystallite hollow ball is that a kind of its inside is hollow, and external ball wall material has the complex phase solid spheroidal material of glassy phase, crystal phase.
The crystallite hollow ball is a kind of new green environment protection type material; Lightweight, HS complex phase solid material with ad hoc structure shape crystal phase; Its characteristic density is little, intensity is high, thermal conductivity is little, fire prevention, nontoxic, do not have radioactivity, corrosion-resistant, can process etc.; Have premium propertiess such as insulation, heat insulation, sound absorption, protection against the tide, fire prevention, belong to the environmental protection and energy saving material.
The crystallite hollow ball is a kind of insulation of superior performance, heat insulation, sound absorption, protection against the tide, fire prevention, the high-strength novel environment friendly material of light weight; Good physicochemical properties such as it has the physical strength height, thermal conductivity is little, thermal property is stable, anti-combustion, indeformable, durable, heatproof, anti-rotten, anti-oxidant, acid and alkali-resistance, nontoxic, "dead", easy processing; With its weather resistance, security, safety, good chemicalstability; In fields such as energy-saving heat preserving, sound absorption noise control, corrosion resistant protection against the tide, heatproof, freeze proof, high temperature insulating, low temperature insulation, moistureproof engineering, sound-absorbing engineering, be with a wide range of applications; With multi-functionals such as energy-saving and environmental protection, safety simultaneously and deposit; Belong to country and advocate the industry of encouraging and supporting, have the vast market development prospect.
The crystallite hollow ball adopts the production technology of cleaning, does not produce pollutent in the production process, and firing temperature is low; Energy consumption is low; Production efficiency is high, and can utilize the broken waste material of mineral products as producing desired raw material in a large number, turns waste into wealth; Save natural resources, the crystallite hollow ball will can be widely used in all respects in people's daily life with the ecological, environmental protective theory of its unique superior physicochemical property and " safety, healthy, health ".
Summary of the invention:
The working method of a kind of crystallite hollow ball of the present invention; Its purpose is exactly the abundant mineral products of making rational use of resources; After simple processing; Prescription by specific component; Under specific temperature schedule and manufacturing condition, produce a kind of crystallite hollow ball of novel energy-conserving environmental protection, its ball wall material is the complex phase solid material by glassy phase and crystal phase composite, can popularization and application in energy-saving heat preserving, sound absorption noise control, corrosion resistant protection against the tide, heatproof, freeze proof, high temperature insulating, low temperature insulation, moistureproof engineering, sound-absorbing engineering etc. are lived various fields.The Mineral resources of selecting special component for use are main raw material, add the part auxiliary material, can use no or little MOX, utilize Al
2O
3-CaO-SiO
2Crystalline phase figure according to specific prescription, mixes several kinds of raw material weighing, drops in the fusing kiln continuously equably after stirring; Flow out the glass metal stock column from fusing kiln discharge port and directly become particle frit material with the cold water shrend, utilize drying line oven dry particle frit material after, be ground into the material powder of 30～200 order fineness with disintegrating apparatus, utilization gathers stupid globoid; Spray cakingagent on it, on the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into sphere of uniform size; After drying, put into mould, the gang mould tool is together put into the crystallization kiln and is carried out rapid crystallization thermal treatment by certain temperature schedule; Organism burns and loses, and housing is crystallization and vitreous simultaneously, slowly annealing cooling; Product after the demoulding is the crystallite hollow ball, sieves check by diameter then, is the crystallite hollow ball.Its product colour can add tinting material adjustment as required, and this kind suitability for industrialized production reduces crystallization temperature greatly, shortens the crystallization soaking time, raises labour productivity, and saves the energy, and then reduces product cost significantly.
The present invention utilizes special component silica sand, coarse whiting sand to be main material production crystallite hollow ball; Auxiliary material mainly contains commercial alumina, fusing assistant calcined soda for industry, industrial borax, industrial zinc oxide, oxygenant, finings etc., and these auxiliary materials reasonably collocation are very favourable to producing the crystallite hollow ball.Different according to adding tinting material, can produce the abundant crystallite hollow ball of color, when selecting little swage raw material for use, will produce beautiful white micro-crystals hollow ball, sparkling and crystal-clear as beautiful, pure white like pearl.
The working method of a kind of crystallite hollow ball of the present invention, its prescription and production technique comprise the following steps:
1. mixing raw material: the following granularity of raw material, weight percent are mixed by special formulation, puddle evenly:
Quartz sand size 0.1～0.7mm 42～55%
Coarse whiting fineness of sand 0.1～2.2mm 20～33%
Calcined soda for industry 3.5～10%
Commercial alumina 3.5～10%
Industrial borax 0～5.5%
Industrial potassium titanate 2.5～6.5%
Industry zinc oxide 0～6.5%
Finings 0～1%
Oxygenant 0～2.5%
Tinting material 0～1.5%
Wherein said tinting material comprises Cr
2O
3, CoO, CuO, nickel oxide, nickel protoxide, red stone, manganese oxide, cadmium red, cadmium yellow, selenium powder or the like have the raw material of coloring effect to micro-crystal board material;
2. high temperature melting: above-mentioned mixing raw material is put into glass furnace be fused into glass metal, 1420～1550 ℃ of temperature of fusion;
3. shrend: glass metal is flowed in the tank, and shrend becomes the particulate material of diameter 0～6 mm;
4. oven dry is pulverized: above-mentioned particulate material is dried with drying plant, be ground into fineness 30～200 powder materials with disintegrating apparatus then;
5. system ball: above-mentioned powder is directly sent in the collar plate shape system ball equipment, utilized and gather stupid globoid, spray cakingagent it on, even laying one deck crystallite powder on the collar plate shape apparatus for making pearl ball rolls into spheroid of uniform size;
6. crystallizing and sintering thermal treatment: the above-mentioned spheroid of processing is packed in the mould, put into the crystallizing and sintering kiln and carry out crystallizing and sintering thermal treatment, 750～1050 ℃ of crystallizing and sintering temperature, crystallizing and sintering soaking time 10～60 minutes;
7. annealing kiln discharge: directly annealing in the crystallizing and sintering kiln is annealed to 150～200 ℃ of temperature, 3～10 hours time, kiln discharge cooling;
8. the demoulding: take out the crystallite hollow ball of the moulding in the mould, fully cooling;
9. screening: press different diameter size spheroid, utilize vibratory screening apparatus to sieve classification;
10. check and packing: the crystallite hollow ball is tested, and through being up to the standards, packing is crystallite hollow ball finished product, and is for sale.
The working method of a kind of crystallite hollow ball of the present invention, its production technique divide four to go on foot greatly: the first step is produced qualified crystallite frit material; Powder after the oven dry of second step is pulverized also utilizes system ball equipment to process spheroid to be burnt; The 3rd step crystallizing and sintering kiln is pressed the specified temp system, and controlled crystallizing and sintering goes out the crystallite hollow ball; The 4th step was screening check and packing.The first step is exactly after mixing the raw material stirring of specific composition, through handling equipment and feeding equipment, continuously evenly to drop in the melt tank furnace, and the glass metal stock column that comes out is quenched into particulate material with cold water; Second step was exactly to utilize disintegrating apparatus these particulate material oven dry and having dried the microcrystal grain material; Process fineness 30～200 purpose crystallite material powder; Powder is directly sent in the collar plate shape system ball equipment, utilizes and gathers stupid globoid, sprays cakingagent on it; On the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into spheroid of uniform size; The 3rd step packed above-mentioned spheroid in the mould into, put into the crystallizing and sintering kiln and carried out crystallizing and sintering thermal treatment, and thermal treatment finishes, and the demoulding obtains crystallite hollow ball blank; The 4th step by the different diameter requirement, utilized vibratory screening apparatus to sieve classification to the crystallite hollow ball, through the product that is up to the standards, was crystallite hollow ball finished product after the packing.This production technology characteristic is: the one, and the production of crystallite frit; The 2nd, flouring technology; The 3rd, ball making process, this step has determined quality product and specification, influences product percent of pass; The 4th, crystallizing and sintering thermal treatment promptly through specific temperature schedule control microcrystal size, the sintering degree of crystallite hollow ball, and then has determined crystallite hollow ball performance, is a most key step, adopts rapid sintering technique; The 5th, screening is sorted out, and check and packing because product weight is low weight, are convenient to transportation, relatively are suitable for the robotization production-lines.
Description of drawings:Fig. 1 is the working method schema of a kind of crystallite hollow ball of the present invention.By raw material 1, mix to carry 2, fusing 3, shrend 4, oven dry 5, grinding 6, system ball 7, crystallizing and sintering thermal treatment 8, annealing 9, demoulding cooling 10, screening 11, check 12, packaging final prod 13 form.
Crystallite hollow ball with the inventive method production; Its housing by glassy phase and crystal mutually form matrix material, principal crystalline phase is mainly β-wollastonite, principal crystalline phase content accounts for 20～60%; Glassy phase, crystal are added ball-like structure mutually; Improved the physical strength of material greatly, expanded the hollow ball Application Areas, the physical and chemical index of this kind crystallite hollow ball:
Unit weight: 600～1600 kg/m
3Water-intake rate:<0.5%
Ultimate compression strength: 15～55 MPa heat resisting temperatures: 450～820 ℃
Thermal conductivity: 0.1～0.5 W/mk
The working method of a kind of crystallite hollow ball of the present invention utilizes cheap mineral products abundant on the earth to be main raw material, like silica sand, coarse whiting etc.; Reduce raw materials cost greatly, crystallizing and sintering and annealing process directly carry out continuously, but continuous production; Thereby enhance productivity; Output improves, and saves the energy, improves the business economic benefit.
Embodiment
are done below in conjunction with embodiment and are further described.
Embodiment one
Silica sand 46% coarse whiting sand 30% commercial alumina 5.5%
Industrial potassium titanate 3.5% calcined soda for industry 5% industrial zinc oxide 5%
Industrial borax 2.6% oxygenant 2% finings 0.4%
Above-mentioned raw materials mixed puddle evenly, put into smelting furnace and be fused into glass metal, become the particulate material below 6 mm through shrend again, after drying with drying plant through 1500 ℃ of temperature; Directly be ground into fineness 50 order crystallite powders, directly send into then in the collar plate shape system ball equipment, utilize and gather stupid globoid, spray cakingagent on it; On the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into spheroid of uniform size, behind the dress mould; Put into crystallizing and sintering kiln internal heating to 960 together with mould and ℃ carry out controlled crystallizing and sintering thermal treatment, 30 minutes crystallization foamed heat insulating time, directly slowly cooling of annealing then; Be cooled to 150 ℃, 8.5 hours time, kiln discharge after the demoulding, cooling, screening sort out; Through being up to the standards, promptly be beautiful white micro-crystals hollow ball, be crystallite hollow ball finished product after the packing.
Embodiment two
Silica sand 50% coarse whiting sand 26% commercial alumina 5.5%
Industrial potassium titanate 3.5% calcined soda for industry 5% industrial zinc oxide 5%
Industrial borax 2.5% oxygenant 2% finings 0.2%
Tinting material 0.3%
Above-mentioned raw materials mixed puddle evenly, put into smelting furnace and be fused into glass metal, become the particulate material below 6 mm through shrend again, after drying with drying plant through 1450 ℃ of temperature; Directly be ground into fineness 100 order crystallite powders, directly send into then in the collar plate shape system ball equipment, utilize and gather stupid globoid, spray cakingagent on it; On the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into spheroid of uniform size, behind the dress mould; Put into crystallizing and sintering kiln internal heating to 920 together with mould and ℃ carry out controlled crystallizing and sintering thermal treatment, 25 minutes crystallization foamed heat insulating time, directly slowly cooling of annealing then; Be cooled to 150 ℃, 8 hours time, kiln discharge after the demoulding, cooling, screening sort out; Through being up to the standards, promptly be light yellow crystallite hollow ball, be crystallite hollow ball finished product after the packing.
Embodiment three
Silica sand (powder) 52% coarse whiting sand (powder) 27% commercial alumina 6%
Industrial potassium titanate 3% calcined soda for industry 3% industrial zinc oxide 4%
Industrial borax 2.6% oxygenant 2% finings 0.3%
Tinting material 0.1%
Above-mentioned raw materials mixed puddle evenly, put into smelting furnace and be fused into glass metal, become the particulate material below 6 mm through shrend again, after drying with drying plant through 1550 ℃ of temperature; Directly be ground into fineness 150 order crystallite powders, directly send into then in the collar plate shape system ball equipment, utilize and gather stupid globoid, spray cakingagent on it; On the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into spheroid of uniform size, behind the dress mould; Put into crystallizing and sintering kiln internal heating to 880 together with mould and ℃ carry out controlled crystallizing and sintering thermal treatment, 25 minutes crystallization foamed heat insulating time, directly slowly cooling of annealing then; Be cooled to 150 ℃, 8 hours time, kiln discharge after the demoulding, cooling, screening sort out; Through being up to the standards, promptly be light grey crystallite hollow ball, be crystallite hollow ball finished product after the packing.
Claims (5)
1. the working method of a crystallite hollow ball is characterized in that comprising the following steps:
(1) mixing raw material: the following granularity of raw material, weight percent are mixed by special formulation, puddle evenly:
Quartz sand size 0.1～0.7mm 42～55%
Coarse whiting fineness of sand 0.1～2.2mm 20～33%
Calcined soda for industry 3.5～10%
Commercial alumina 3.5～10%
Industrial borax 0～5.5%
Industrial potassium titanate 2.5～6.5%
Industry zinc oxide 0～6.5%
Finings 0～1%
Oxygenant 0～2.5%
Tinting material 0～1.5%
Wherein said tinting material comprises Cr
2O
3, CoO, CuO, nickel oxide, nickel protoxide, red stone, manganese oxide, cadmium red, cadmium yellow, selenium powder or the like have the raw material of coloring effect to micro-crystal board material;
(2). high temperature melting: above-mentioned mixing raw material is put into smelting furnace be fused into glass metal, 1420～1550 ℃ of temperature of fusion;
(3). shrend: glass metal is flowed in the tank, and shrend becomes the particulate material of diameter 0～6 mm;
Oven dry is pulverized: above-mentioned particulate material is dried with drying plant, be ground into fineness 30～200 powder materials with disintegrating apparatus then;
System ball: above-mentioned powder is directly sent in the collar plate shape system ball equipment, utilized and gather stupid globoid, spray cakingagent on it, justifying
Evenly lay one deck crystallite powder on the dish-type apparatus for making pearl ball, roll into spheroid of uniform size;
(6). crystallizing and sintering thermal treatment: the above-mentioned spheroid of processing is packed in the mould, put into the crystallizing and sintering kiln and carry out crystallizing and sintering thermal treatment, 750～1050 ℃ of crystallizing and sintering temperature, crystallizing and sintering soaking time 10～60 minutes;
(7). the annealing kiln discharge: directly annealing in the crystallization foaming kiln is annealed to 150～200 ℃ of temperature, 3～10 hours time, kiln discharge cooling;
(8). the demoulding: take out the crystallite hollow ball of the moulding in the mould, fully cooling;
(9). screening: press different diameter size spheroid, utilize vibratory screening apparatus to sieve classification;
(10). check and packing: the crystallite hollow ball is tested, and through being up to the standards, packing is crystallite hollow ball finished product, and is for sale.
2. the working method of a kind of crystallite hollow ball according to claim 1; It is characterized in that making ball and crystallizing and sintering thermal treatment process; Select for use and gather stupid foam spheroid and collar plate shape system ball equipment; Produce qualified spheroid, to guarantee having the crystal phase of hollow structure and the composite spheroid of glassy phase after the crystallizing and sintering thermal treatment.
3. the working method of a kind of crystallite hollow ball according to claim 1, it is characterized in that its production technique divide four greatly the step: the first step is produced qualified crystallite frit material; Powder after the oven dry of second step is pulverized also utilizes system ball equipment to process spheroid to be burnt; The 3rd step crystallizing and sintering kiln is pressed the specified temp system, and controlled crystallizing and sintering goes out the crystallite hollow ball; The 4th step was screening check and packing.
4. the first step is exactly after mixing the raw material stirring of specific composition, through handling equipment and feeding equipment, continuously evenly to drop in the melt tank furnace, and the glass metal stock column that comes out is quenched into particulate material with cold water; Second step was exactly to utilize disintegrating apparatus these particulate material oven dry and having dried the microcrystal grain material; Process fineness 30～200 purpose crystallite material powder; Powder is directly sent in the collar plate shape system ball equipment, utilizes and gathers stupid globoid, sprays cakingagent on it; On the collar plate shape apparatus for making pearl ball, evenly lay one deck crystallite powder, roll into spheroid of uniform size; The 3rd step packed above-mentioned spheroid in the mould into, put into the crystallizing and sintering kiln and carried out crystallizing and sintering thermal treatment, and thermal treatment finishes, and the demoulding obtains crystallite hollow ball blank; The 4th step by the different diameter requirement, utilized vibratory screening apparatus to sieve classification to the crystallite hollow ball, through the product that is up to the standards, was crystallite hollow ball finished product after the packing; This production technology characteristic is: the one, and the production of crystallite frit; The 2nd, flouring technology; The 3rd, ball making process, this step has determined quality product and specification, influences product percent of pass; The 4th, crystallizing and sintering thermal treatment promptly through specific temperature schedule control microcrystal size, the sintering degree of crystallite hollow ball, and then has determined crystallite hollow ball performance, is a most key step, adopts rapid sintering technique; The 5th, screening is sorted out, and check and packing because product weight is low weight, are convenient to transportation, relatively are suitable for the robotization production-lines.
5. the working method of a kind of crystallite hollow ball according to claim 1, it is characterized in that its Production Flow Chart by raw material 1, mix to carry 2, fusing 3, shrend 4, oven dry 5, grinding 6, system ball 7, crystallizing and sintering thermal treatment 8, annealing 9, demoulding cooling 10, screening 11, check 12, packaging final prod 13 form; With the crystallite hollow ball that the inventive method is produced, its housing by glassy phase and crystal mutually form matrix material, principal crystalline phase is mainly β-wollastonite, its physical and chemical index: unit weight: 600～1600 kg/m
3Water-intake rate:<0.5%
Ultimate compression strength: 15～55 MPa heat resisting temperatures: 450～820 ℃
Thermal conductivity: 0.1～0.5 W/mk.
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| CN2011104469490A CN102531395A (en) | 2011-12-28 | 2011-12-28 | Method for producing microcrystal hollow spheres |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744992A (en) * | 2017-01-23 | 2017-05-31 | 瑞声科技（南京）有限公司 | A kind of molecular sieve hollow ball for strengthening low frequency performance and preparation method thereof |
-
2011
- 2011-12-28 CN CN2011104469490A patent/CN102531395A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744992A (en) * | 2017-01-23 | 2017-05-31 | 瑞声科技（南京）有限公司 | A kind of molecular sieve hollow ball for strengthening low frequency performance and preparation method thereof |
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Application publication date: 20120704 |