CN105541304A - Preparation method for powder granules of ceramic product by applying wet mixing granulator - Google Patents
Preparation method for powder granules of ceramic product by applying wet mixing granulator Download PDFInfo
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- CN105541304A CN105541304A CN201510918489.5A CN201510918489A CN105541304A CN 105541304 A CN105541304 A CN 105541304A CN 201510918489 A CN201510918489 A CN 201510918489A CN 105541304 A CN105541304 A CN 105541304A
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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
- 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
- C04B35/10—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
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62695—Granulation or pelletising
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63416—Polyvinylalcohols [PVA]; Polyvinylacetates
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Glanulating (AREA)
Abstract
The invention provides a preparation method for powder granules of a ceramic product by applying a wet mixing granulator. The method comprises the following steps: subjecting to-be-processed fine powder to measuring and weighing according to requirements of equipment, then adding the powder into a granulator, adding water or an adhesive solution according to a required proportion, carrying out granulating under stirring, and then adding a bit of powder in the later period of granulating to polish the granules so as to complete molding of the granules in the granulator. According to the invention, during preparation, the fine powder agglomerates since the surface of the fine powder is wetted by a solution, and through complete mixing and stirring by a granulating knife, granule sizes gradually form and grow up, thereby forming uniform wet granules; granulating efficiency of the powder is greatly improved; powder stacking density per unit volume is increased; and a green body and a product press-molded from the powder are improved in performances and can be convenient to produce.
Description
Technical field
The invention belongs to electroporcelain material production field, relate to a kind of method applied Wetmixinggranulator and prepare ceramic powder granule.
Background technology
Electroporcelain material in electrotechnical ceramics insulating material, mainly by aluminosilicate mixed preparing such as clay, feldspar, quartz (or alumina materials), through shaped, burn till at relatively high temperatures and forms.
Electroceramics series products kind is more, its shape, difference in size are also very large, impel in industry production manufacturing processed and form different technology modes, for high-voltage electric porcelain product, the plasticity of blank is utilized to adopt wet method extrusion forming to be a kind of traditional technology mode, and the isostatic pressed dry process adopted in recent years is to manufacturing the larger product of high large-scale difficulty, become again a kind of new manufacture technics mode.In isostatic pressing process, powder preparation, blank compacting, repaired biscuit and fire in main processes, quality prepared by powder plays critical effect to the compacting of isostatic pressed goods and product performance.
At present, the preparation of electric porcelain production powder body material, all have employed spraying dry tower to carry out, mostly be pressure atomizer inverse-and stream or atomizing wheel and stream mode of operation, equipment is complicated, expensive, shaping powder granule be hollow ball state, the packing density of particle under unit volume is not high, and then affects the performance such as electromechanics heat of the dry tenacity of base substrate and product.
Summary of the invention
The object of the invention is to overcome prior art defect, provide a kind of method applied Wetmixinggranulator and prepare ceramic powder granule, the production particle of preparation is solid spherical, improves the unit weight producing particle.
For achieving the above object, the present invention adopts following technical scheme:
Application Wetmixinggranulator prepares the method for ceramic powder granule, comprises the following steps:
Step one, deironing, drying, mixing and refinement are carried out to the electrical porcelain raw materials mixed;
Step 2, carrying out computation weigh by processing through step one powder obtained, adding in Wetmixinggranulator, then adding the water of requirement ratio or the solution with cementing property, carry out stirring-granulating; Phase after the pelletizing, add powder and polishing is carried out to particle, complete grain forming;
Step 3, shaped granule to be sieved and particle separation, reject the sheet walk being bonded to block, namely complete the preparation process of particle.
Further, pour out in step 2 stirring-granulating process after powder granule is shaping, carrying out airing is moisture evaporation, then adds in Wetmixinggranulator and carry out polishing operation.
Further, sieve out grain diameter and be in powder granule between 20 order to 120 orders as production particle.
Further, the described solution with cementing property is polyvinyl alcohol solution.
Further, the powder granule of preparation is solid sphere shape, and under unit volume, tap density is 1.40 ~ 1.50g/cm
3.
Further, mixer-granulator is intermittent type wet-mixed tablets press.
The present invention's application Wetmixinggranulator prepares the method for ceramic powder granule; by fine powder to be processed; computation weigh is carried out according to the requirement of equipment itself; add in tablets press; add the water of requirement ratio or the solution with cementing property again, carry out stirring-granulating, after the pelletizing the phase; add a little powder and polishing is carried out to particle, complete the grain forming in tablets press.In manufacturing processed, because fine powder is subject to the surface wettability of solution, powder agglomeration, the again stirring of the abundant mixing of warp and granulating cutter, particle diameter progressively generates and grows up, and then becomes uniform wet granular.
Compared with the pressure spray drying tower equipment of existing use, the cheap efficiency of this equipment price is high, safety simple to operate.
The powder granule adopting wet-mixed tablets press to prepare, for electroceramics production of articles, also has the following advantages:
1, the granulation working (machining) efficiency of powder significantly improves.
Use mixer-granulator, process period shortens greatly, is 10 times of general small spraying granulating equipment efficiency, and continous way mixing granulation machine, its output is 4 ~ 5 times of the suitable granulating equipment of scale.
2, the pelletization of powder is relatively simple.
Intermittent type wet-mixed tablets press, only need insert in container by material fine powder, add the fluid such as water or binder solution, and through the stirring of fully mixing and granulating cutter, and particle progressively generates and even.And continous way mixer passes through its material in course of conveying, automatic gauge adds water, automatically mixing granulation, automatic classification screening and continuous drying, thus completes whole pelletization.Relative Spray granulation equipment, decreases the link such as equipment intensification, slurry transportation of spray tower, is beneficial to operation.
3, the unit volume tap density of powder improves.
Powder granule prepared by equipment machine, its particle shape is solid sphere shape, and the tap density under its unit volume can reach 1.40 ~ 1.50g/cm
3, same material and be hollow ball shape by the particle that press spray granulating equipment is shaping, tap density only has 0.96 ~ 1.06g/cm
3left and right, improves about 40% ~ 50%.Simultaneously because powder granule shape is solid spherical, its good fluidity is in hollow ball-shape.
4. base substrate and product performance improve, and are beneficial to production.
Due to significantly raising and the mobility increase of powder granule unit weight, the base substrate porosity using it shaping also significantly reduces thereupon, 18% ~ 20% can be reduced to by 28% ~ 30% of the spherical material of conventional hollow, base substrate dry body strength improves, sintering temperature reduces, be easy to into porcelain, the dynamo-electric thermal characteristics of porcelain is improved simultaneously.The change of this powder preparation technology, the production for the large-scale electrotechnical porcelain product of height provides favourable powder basis, and processing performance is improved, and the base substrate spoilage in production process also can significantly reduce
The use of wet-mixed tablets press, for electroceramics production of articles, significantly can improve the preparation efficiency of powder granule, operating procedure is simple, particulates' properties is higher, the body crack defects thereupon in production process and product performance are corresponding improve also.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
One, the preparation of electroceramics particle
In electric porcelain production process, desired raw material source has several, or the mixing mud good to ball milling of preparing burden in proportion carries out drying; Or to using the flake collected in process of manufacture; Or to reaching all kinds of material rate mixing of particle fineness situation, and pulverize further and homogenizing.
Carry out Crushing and screening to dried electroceramics powder, sieve number can be chosen as 120 orders, collection screen lower part, has namely completed fine powder preparation.
First add in tablets press by 300kg fine powder will be prepared; add water or polyvinyl alcohol bonding solution 44 kilograms; after equipment runs 5 minutes; add water or bonding solution be about 2kg; again run 3 minutes, arrestment takes out a small amount of sample and observes, as shaping in determined; can add the powder of 20 kilograms, this object carries out surface to shaping spheroid to carry out polished finish.
Whole equipment can stop, pouring out shaping mixed powder after running about 15 minutes, and now shaping particle is comparatively large owing to adding the water yield, has sticky connection phenomenon, airing form can be taked to carry out the rapid evaporation of particle surface between partial particulate.
To prepared particle, require that its granularity is between 0.15mm to 1.0mm, carried out screen sizing subsequently, slubbing screen cloth can be adopted as 18 orders, secondary screen net 100 object bushing screen, gets intermediate portion as conforming particle, completes whole granulation process.
Two, the preparation of 300kg special cermacis 75% aluminum oxide blank particle
First to be equipped by series of process and technological process is run and prepared with carrying out required mud, namely carry out raw-material proportioning mixing by material requirement, to the pulverizing of material particles and homogenizing, the deironing etc. of sieving of mud.
Carry out drying to meeting the requirements of qualified mud, and use suitable equipment to carry out Crushing and screening necessarily to the material lumpd in drying process, sieve number may be selected to be 100 orders or 120 orders, gets the preparation that namely its screen underflow completes fine powder.
According to processing requirement; 280kg alumina fine powder to be prepared is added in tablets press; add water or polyvinyl alcohol bonding mixed solution 44 kilograms; after equipment runs 5 minutes, add water or bonding solution be about 2kg, run arrestment after about 3 minutes; take out a small amount of sample to observe; as shaping in determined, can add the powder of 20 kilograms, this object carries out surface to shaping spheroid to carry out polished finish.
Whole equipment can stop, pouring out shaping mixed powder particle after running about 15 minutes, and now shaping particle is comparatively large owing to adding the water yield, has sticky connection phenomenon, airing form can be taked to carry out the rapid evaporation of particle surface between partial particulate.
To prepared particle, require that its granularity is between 0.2mm to 0.8mm, carried out screen sizing subsequently, slubbing screen cloth can be adopted as 20 orders, secondary screen net 60 object bushing screen, gets intermediate portion as conforming particle, completes whole granulation process.
It is more than the preparation process of electroceramics and special cermacis powder granule.
Use wet-mixed tablets press, insert in container, add water or binder solution by material fine powder, moistening powder surface completes it and reunites, and through abundant mixing with stir, and particle diameter is progressively grown up generation, and then becomes even wet granular.
Mixing granulation once completes, and process period shortens greatly, raises the efficiency 4-5 doubly.Material is mixing granulation in airtight stainless steel, once can produce desired product, administration measure and also quality product high.Easy and simple to handle, adjust time controller by processing arrangement, one-period can complete mixing granulation operation.Operational safety, operate in airtight prosperity container, safety mutually-locking device is housed, and when opening container cover, power supply cuts off automatically.Agitator motor realizes stepless speed regulation.Just with stirring arm and the cutters of back taper granulation integral pot technology and special shape, ensure granulation finished product evenly, reliable.Automatic control.
Claims (6)
1. apply the method that Wetmixinggranulator prepares ceramic powder granule, it is characterized in that comprising the following steps:
Step one, deironing, drying, mixing and refinement are carried out to the electrical porcelain raw materials mixed;
Step 2, carrying out computation weigh by processing through step one powder obtained, adding in Wetmixinggranulator, then adding the water of requirement ratio or the solution with cementing property, carry out stirring-granulating; Phase after the pelletizing, add powder and polishing is carried out to particle, complete grain forming;
Step 3, shaped granule to be sieved and particle separation, reject the sheet walk being bonded to block, namely complete the preparation process of particle.
2. the method preparing ceramic powder granule according to claim 1, is characterized in that: pour out after powder granule is shaping in step 2 stirring-granulating process, and carrying out airing is moisture evaporation, then adds in Wetmixinggranulator and carry out polishing operation.
3. the method preparing ceramic powder granule according to claim 1, is characterized in that: sieve out grain diameter and be in powder granule between 20 order to 120 orders as production particle.
4. the method preparing ceramic powder granule according to claim 1, is characterized in that: the described solution with cementing property is polyvinyl alcohol solution.
5. the method preparing ceramic powder granule according to claim 1, is characterized in that: the powder granule of preparation is solid sphere shape, and under unit volume, tap density is 1.40 ~ 1.50g/cm
3.
6. the method preparing ceramic powder granule according to claim 1, is characterized in that: mixer-granulator is intermittent type wet-mixed tablets press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918489.5A CN105541304A (en) | 2015-12-10 | 2015-12-10 | Preparation method for powder granules of ceramic product by applying wet mixing granulator |
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| CN201510918489.5A CN105541304A (en) | 2015-12-10 | 2015-12-10 | Preparation method for powder granules of ceramic product by applying wet mixing granulator |
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| CN105541304A true CN105541304A (en) | 2016-05-04 |
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| CN201510918489.5A Pending CN105541304A (en) | 2015-12-10 | 2015-12-10 | Preparation method for powder granules of ceramic product by applying wet mixing granulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115521155A (en) * | 2022-10-18 | 2022-12-27 | 陕西科技大学 | Intermittent ceramic granulation powder preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633492A (en) * | 2012-04-19 | 2012-08-15 | 金刚新材料股份有限公司 | Production process for preparing ceramsite by using low-grade bauxite |
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2015
- 2015-12-10 CN CN201510918489.5A patent/CN105541304A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633492A (en) * | 2012-04-19 | 2012-08-15 | 金刚新材料股份有限公司 | Production process for preparing ceramsite by using low-grade bauxite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115521155A (en) * | 2022-10-18 | 2022-12-27 | 陕西科技大学 | Intermittent ceramic granulation powder preparation method |
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