CN107058844B - A kind of micropore metal ceramics and preparation method as wet electrical dust precipitator pole plate - Google Patents
A kind of micropore metal ceramics and preparation method as wet electrical dust precipitator pole plate Download PDFInfo
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- CN107058844B CN107058844B CN201710387380.2A CN201710387380A CN107058844B CN 107058844 B CN107058844 B CN 107058844B CN 201710387380 A CN201710387380 A CN 201710387380A CN 107058844 B CN107058844 B CN 107058844B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/14—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
Abstract
The preparation method of the invention discloses a kind of micropore metal ceramics as wet electrical dust precipitator pole plate.Include the following steps are as follows: (1) mixed-powder is passed through into wet-milling, drying, sieving, and loaded and dried in alcoholic solution；The mixed-powder is by base body TiB2It is formed with the powder particle mixture of reinforcement Fe, Co and Mo；The volume ratio of mixed-powder is TiB2: Fe: Co: Mo=7: 1: 1: 1；(2) after cermet material molding being made using foam metal Ni load mixed-powder compacting sintering, high temperature sintering is finished product.The invention has the advantages that: by mixed-powder carry out wet-milling, drying, sieving and in alcoholic solution excessive load then carries out high temperature sintering into porous foam metal.Using porous foam metal as carrier, compared with prior art, cermet obtained by the present invention has good electric conductivity, high porosity, has a wide range of application load mixed-powder.
Description
Technical field
The present invention relates to dedusting technology field and field of powder metallurgy, and in particular to one kind is used as wet electrical dust precipitator pole plate
Micropore metal ceramics preparation method.
Background technique
Wet electrical dust precipitator is that the water membrane formed on dust collecting pole plate using it cleans the powder being trapped on pole plate
Dirt.Compared with dry electric precipitation device: wet electrical dust precipitator does not need rapping apparatus, to eliminate secondary caused by rapping raise
Dirt prevents reentrainment of dust caused by air-flow and corona wind；Due to being dispersed with the moisture film to flow downward on pole plate always, it is caught
The dust (flue dust) collected on pole plate is rinsed out by moisture film immediately, thus for high resistivity dust (flue dust), it will not occur anti-
Corona, reentrainment of dust caused by avoiding thus；For low resistivity dust (flue dust), the particle that will not be captured is fled from
Pole plate, the phenomenon that again returning to air-flow.Due to above-mentioned advantage, wet electrical dust precipitator has very high efficiency of dust collection, Ke Yishi
The dust of various specific resistances is answered, quite harsh granular material discharged standard is met.
Existing wet electrical dust precipitator dust collector pole is mostly board-like or drum type brake.Due in wet electrical dust precipitator moisture film in pole plate
It is upper voluntarily to flow downward by gravity, if meeting with obstruction or the Geometrical change of polar board surface, flow direction will be changed, " remittance occurs
Phenomena such as stream ", " branch ", cannot form complete uniform ash removing water film below pole plate, and the dust in these places cannot be timely
Clean up, get deeper, cause corona discharge electrode to sedimentating dust discharge, or even will affect electric precipitator power supply, cause deduster without
Method operates normally.Current Thermal generation unit is often larger, also proposed bigger requirement to deduster processing exhaust gas volumn, this
Cause the design size of corresponding wet electrical dust precipitator bigger, more than ten meters even more than 20 meters of pole plate height will make on pole plate
Being uniformly distributed for moisture film is more difficult.Traditional wet electrical dust precipitator uses steel dust collecting pole plate, and steel dust collecting pole plate is inherently
Major part is occupied in cost input.In addition, the environment that gathers dust of wet type will cause heavy corrosion to common steel pole plate.Separately
Outside, wet electrical dust precipitator generally requires a large amount of deashing water, this can not meet in order to which the dust collection of trapping gets up
Requirement to the intensive utilization of water resource, and a large amount of deashing water can be generated, secondary pollution is caused to environment, is also unfavorable for powder
The comprehensive utilization of coal ash.
Cermet is to consist of two parts, respectively hard phase and Binder Phase.Hard phase is for promoting the resistance to of material
Mill property, corrosion resistance and hardness, and Binder Phase is then to make hard phase is even closer to be combined together.So in hard phase
Selection with Binder Phase is to determine the key factor of cermet performance.Cermet electric precipitator passes through with the gold with micropore
Belong to ceramics to take for conventional steel plates, can be to avoid the environment heavy corrosion caused by common steel pole plate that gathers dust of wet type, and pass through
Cermet dust collection plate micropore penetrates into deashing water, and using the self weight of water, being voluntarily formed down moisture film will be on cermet dust collection plate
Dust catching.Compared with traditional steel plate, the deficiency of cermet is that its electric conductivity is low and the porosity is not high.
Summary of the invention
The technical problem to be solved by the present invention is to overcome drawbacks described above of the existing technology, providing one kind can be resistant to
By high temperature, corrosive flue gas environment, surface is smooth, and has good rigidity and mechanical strength, can be used as wet type
The preparation method of the electrically conductive cermet material with micropore of electric precipitator pole plate.
The technical scheme adopted by the invention is that:
A kind of preparation method of the micropore metal ceramic material as wet electrical dust precipitator pole plate, which is characterized in that including
Following steps are as follows:
(1) mixed-powder is passed through into wet-milling, drying, sieving, and is loaded and dried in alcoholic solution；The mixing
Powder is by base body TiB2It is formed with the powder particle mixture of reinforcement Fe, Co and Mo；The volume ratio of mixed-powder is TiB2∶
Fe: Co: Mo=7: 1: 1: 1；
(2) after cermet material molding being made using foam metal Ni load mixed-powder compacting sintering, high temperature sintering
For finished product.
Preferably, wet-milling is positive and negative rotation alternate run, positive and negative rotation respectively run 1 hour, midfeather 5 minutes, when operation
Between be total up to 255 minutes, wet grinding media selects volatile alcoholic solution；Dry is vacuum drying, and dry temperature is 100 DEG C
~120 DEG C；Sieving referred to the mechanical picker of 140 mesh；Upper load is vacuum drying load, molten in alcohol using excessive mixed-powder
Slowly heating is carried on foam metal Ni in liquid, and the time is 24 hours.
Preferably, the pressing pressure after load is 30~40MPa, kept for 2~5 minutes；Sintering temperature be 800 DEG C~
1200℃。
The beneficial effects of the present invention are: due to base body TiB2It is hexagonal crystal system C32The metalloid compound of type structure,
The interlaced appearance in boron atom face and titanium atom face in crystal structure, forms two-dimension netted construction, and the outer layer of boron atom
Around 4 electronics, each boron atom is combined between remaining 3 boron atom by covalent bond.This layer structure and titanium
The electronic structure of atoms outermost makes titanium diboride possess metallic luster and has excellent electric conductivity, and Ti-B ion therein
Key makes the material possess high-melting-point, high rigidity and good stability again.Because Mo is body-centered cube cell configuration, Mei Gejing
There are 2 metallic atoms around born of the same parents, so Mo, which is added, can effectively increase the density of material, improve hardness and bending strength,
And the addition of Fe can make TiB2The intermiscibility of powder and metal powder is very low.And cobalt is production heat proof material, high hardness material
With the important source material of various chromic salts.So the present invention selects addition Fe, Mo, Co metal powder granulates as reinforcement.The present invention
Mixed-powder volume ratio are as follows: 7: 1: 1: 1 (TiB2/Fe/Co/Mo).Preparation method of the present invention is by carrying out mixed-powder
Wet-milling, drying, sieving and excessive load then carries out high temperature sintering into porous foam metal in alcoholic solution.With porous bubble
Foam metal is carrier, and compared with prior art, cermet obtained by the present invention has good conduction to load mixed-powder
Property, has a wide range of application at high porosity.
Specific embodiment
Technical solution of the present invention is further explained and described below in conjunction with specific embodiment.
The basic step of test are as follows:
(1) mixed-powder is prepared
Raw material is weighed by the component and proportion of setting, in a planetary ball mill with volume ratio for 7: 1: 1: 1 (TiB2/
Fe/Co/Mo), according to positive and negative rotation alternate run, midfeather 5 minutes, positive and negative rotation was respectively run 1 hour, carried out 255 minutes wet
Formula ball milling, then place it in vacuum oven and carry out 110 DEG C of vacuum drying in 24 hours.140 meshes are crossed after drying.It is mixed
Powder.
(2) it loads
Excessive mixed-powder and porous foam metal Ni are added in beaker, is uniformly mixed, it is dry to be placed in 110 DEG C of vacuum
It is 24 hours dry in dry case.
(3) it suppresses, be sintered
Foam metal after taking out load, scrapes the mixed-powder of excess surface, places it on tablet press machine, slowly pressurizes
It to 30Mpa, is kept for 3 minutes, taking-up is placed in vacuum sintering furnace, with 10 DEG C of heating rate to 1100 DEG C, keeps the temperature 30 points
Clock, natural cooling obtain finished product.
The above for preferred embodiments only of the invention, but cannot limit practical range of the invention according to this.That is root
Equivalence changes made by range and description according to the invention patent and modification should belong to covering scope of the invention.
Claims (3)
1. a kind of preparation method of the micropore metal ceramic material as wet electrical dust precipitator pole plate, which is characterized in that including with
Lower step are as follows:
(1) mixed-powder is passed through into wet-milling, drying, sieving, and is loaded and dried in alcoholic solution；The mixed-powder
By base body TiB2It is formed with the powder particle mixture of reinforcement Fe, Co and Mo；The volume ratio of mixed-powder is TiB2∶Fe∶Co
: Mo=7: 1: 1: 1；
(2) using foam metal Ni load mixed-powder compacting sintering be made cermet material molding after, high temperature sintering be at
Product.
2. the preparation method of micropore metal ceramic material according to claim 1, which is characterized in that wet-milling is positive and negative rotation friendship
For operation, positive and negative rotation is respectively run 1 hour, and midfeather 5 minutes, runing time was total up to 255 minutes, and wet grinding media selection is easily waved
The alcoholic solution of hair；Dry is vacuum drying, and dry temperature is 100 DEG C~120 DEG C；Sieving referred to the mechanical picker of 140 mesh；On
Load is vacuum drying load, and using excessive mixed-powder, slowly heating is carried on foam metal Ni in alcoholic solution,
Time is 24 hours.
3. the preparation method of micropore metal ceramic material according to claim 1, which is characterized in that the compacting pressure after load
Power is 30~40MPa, is kept for 2~5 minutes；Sintering temperature is 800 DEG C~1200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387380.2A CN107058844B (en) | 2017-05-22 | 2017-05-22 | A kind of micropore metal ceramics and preparation method as wet electrical dust precipitator pole plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387380.2A CN107058844B (en) | 2017-05-22 | 2017-05-22 | A kind of micropore metal ceramics and preparation method as wet electrical dust precipitator pole plate |
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| Publication Number | Publication Date |
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| CN107058844A CN107058844A (en) | 2017-08-18 |
| CN107058844B true CN107058844B (en) | 2019-04-30 |
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| CN113308713A (en) * | 2021-05-25 | 2021-08-27 | 西部金属材料股份有限公司 | Metal ceramic anode and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304239A (en) * | 2013-06-27 | 2013-09-18 | 中国铝业股份有限公司 | TiB2-based metal ceramic material for aluminium cell and preparation method of material |
| CN104745908A (en) * | 2015-03-23 | 2015-07-01 | 山东大学 | Preparation method of titanium boride compounded titanium carbide-based metal ceramic cutter material |
| CN105734387A (en) * | 2016-03-17 | 2016-07-06 | 中南大学 | TiB2 based metal ceramic and manufacturing method thereof |
| CN106583451A (en) * | 2016-12-01 | 2017-04-26 | 桂林理工大学 | Method for preparing multilayer-structured metal/nanoparticle composite material prepared by accumulation pack rolling and heat treatment |
-
2017
- 2017-05-22 CN CN201710387380.2A patent/CN107058844B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304239A (en) * | 2013-06-27 | 2013-09-18 | 中国铝业股份有限公司 | TiB2-based metal ceramic material for aluminium cell and preparation method of material |
| CN104745908A (en) * | 2015-03-23 | 2015-07-01 | 山东大学 | Preparation method of titanium boride compounded titanium carbide-based metal ceramic cutter material |
| CN105734387A (en) * | 2016-03-17 | 2016-07-06 | 中南大学 | TiB2 based metal ceramic and manufacturing method thereof |
| CN106583451A (en) * | 2016-12-01 | 2017-04-26 | 桂林理工大学 | Method for preparing multilayer-structured metal/nanoparticle composite material prepared by accumulation pack rolling and heat treatment |
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