CN107062895A - Energy-conserving and environment-protective de-waxing kiln and its de-waxing technique - Google Patents
Energy-conserving and environment-protective de-waxing kiln and its de-waxing technique Download PDFInfo
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- CN107062895A CN107062895A CN201710425382.6A CN201710425382A CN107062895A CN 107062895 A CN107062895 A CN 107062895A CN 201710425382 A CN201710425382 A CN 201710425382A CN 107062895 A CN107062895 A CN 107062895A
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- Prior art keywords
- tunnel cave
- waxing
- product
- tunnel
- kiln
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
Abstract
The present invention relates to the first tunnel cave and the second tunnel cave of a kind of de-waxing kiln, including connection, product is pushed into the first tunnel cave again after being preheated to 180 DEG C to 300 DEG C and held for some time by the second tunnel cave.The present invention increases tunnel cave on the original basis so that product first carries out preheating insulation, extends original low-temperature zone soaking time, carries out the complete de-waxing processing of high-temp combustion after insulation again；It during preheating insulation (de-waxing of low temperature half), can ensure that de-waxing product will not heat up in low-temperature range well, so as to ensure that de-waxing product does not ftracture, production cost, reduction loss be greatlyd save, with huge economic benefit；The present invention need to only carry out structure of modification on the basis of existing tunnel cave, and overall structure is simple, and improvement cost is low, it is easy to promote.
Description
Technical field
The present invention relates to electronic ceramics production equipment facility technology field, more particularly to in electronic ceramics production process
Exclude the tunnel cave of paraffin.
Background technology
Electronic ceramics (electronic ceramic), referring in the electronics industry can be using electricity, the ceramics of magnetic property.
Electronic ceramics is finally to obtain the ceramics with New function by accurate control to surface, crystal boundary and dimensional structure.In energy
Can extensive use in terms of source, household electrical appliance, automobile.
Known special cermacis manufacturing technology, such as isostatic pressing, dry-pressing formed, hot-injection molding, injection forming, injection
Shaping, note solidification forming in situ etc., now, during industrial mass production, it is most economical, using it is most be hot-injection molding and
Injection molding technique, China's hot-injection molding technique accounts for more than the 70% of special cermacis production capacity.Hot pressing note technique is by ceramics
Powder is mixed with hot melt colloid, is heated to after mobility temperature, pressurization injection mould molding, then through adsorbent dumping, is then burnt
Into.During its dumping, obvious flue dust and chemical odor pollution are produced, influence is produced on the crowd around it.
Technological process is noted in hot pressing：Ceramic powder and PUR system slurry, pressure injection shaping, adsorbent dumping (row
Wax), biscuiting, burn till, post-processing, test package dispatch from the factory.Wherein, pulping process is with heating organic modelings such as colloid by ceramic powder
Property thing carry out heating homogenizing mixing, organic plastic owner composition be purity and the narrow high-quality paraffin of melting range, a small amount of plasticising
Agent oleic acid, natural propolis etc., or be hot-melt resin.In this technical process, the organic plastic agent with contaminative is introduced,
Plastic agent typically accounts for 13% or so (by taking the high aluminum oxide special cermacis of accounting as an example) of ceramic powder gross mass.Dumping biscuiting
Process is, by the product of forming, to be loaded in mixture with alumina adsorbant in earthen bowl, in dumping combustion gas shuttle kiln, by normal temperature extremely
1050 DEG C of heating process, discharges organic plasticizer, is discharged into the final generation in this procedure of the pollutant of air, is arranged to air
Put flue dust and chemical gas.It is a unburnt thermochemical reaction process in whole dumping biscuiting technical process, and
Due to high temperature, hot melt colloid and the course of reaction of the cracking of furnace fuel liquefied gas and synthesis are generated, and generate intermediate product.
The hot melt colloid wherein largely used is paraffin, is the rich product of oil, is the mixture of several higher alkanes, mainly positive two
Dodecane (C22H46) and positive octacosane (C28H58), carbon elements about 85%, containing protium about 14%.Paraffin not exclusively fires
It is that the C in the low-carbon low hydrogen class material produced after Pintsch process, reactant produces smoke contamination to burn generation CxHy, in dumping
It can be seen that the flue dust of black is emerged on the chimney of kiln, still, the imperfect combustion of simple paraffin can't be produced obvious
Chemical odor sense of discomfort.
At present, in electronic ceramics industry, main focus, which is concentrated on, solves the problems, such as pollution emission, the existing overwhelming majority
Producer realizes non-pollution discharge, meet the requirement of environmental protection by being improved to traditional kiln using environment-protection kiln.Such as Application No.
2010101376131st, in the patent of entitled ceramic dumping environment-protection kiln, it uses high-temperature catalytic mode to enter the tail gas of de-waxing
Row processing；As in Application No. 2012207348568, the patent of entitled environmental protection and energy saving wax removal kiln, entered using in smokejack
The mode of row flame heating, lights not sufficiently combusted flue gas, reduces fume emission；Such as Application No. 2010105957815, name
In referred to as a kind of utilization microwave kiln de-waxing, the patent of the process of dumping, by the way of microwave is heated, by heating paraffin
After-combustion is excluded.To realize energy-conservation, Application No. 2006201471582, the patent of entitled step-shaped wax removal kiln, using ladder
The room of burning till of shape is burnt till successively, makes the heating of de-waxing technique gently, product is heated evenly, and improves the thermal efficiency, reduction energy consumption.
The subject matter ignored at present in industry, it is also that insurmountable problem is that made ceramic product cracking is asked
Topic.It is well known that generally using tunnel cave during de-waxing, tunnel cave is a straight channel, and one end of the passage is
Product input, the other end be output of products end, from product input to multiple heating sections are divided between output of products end, such as from
250 DEG C to 300 DEG C of temperature is played, from 300 DEG C to 360 DEG C etc..Due to being close between front and rear product under the progradation of propeller
It is advanced slowly, when temperature reaches 360 DEG C, paraffin meeting vigorous combustion forms naked light, is now the violent de-waxing of product, and bright
Fire can spread to the product subsequently followed up.To prevent the follow-up product catching fire for being less than 360 DEG C, generally in 300 DEG C of heating
Section sets suction opeing, it is ensured that temperature is not higher than 300 DEG C herein, so that at utmost avoid naked light from being spread to subsequent product, but
It can not avoid completely.This tunnel cave de-waxing, the subject matter currently encountered is that the finished product sintered after de-waxing is burst, secondary
Product rate is 3%-5%, and change with seasonal climate, the factor such as air pressure change, product bursts up to 8%-20%.With 95 oxygen
Change exemplified by aluminium ceramics, production cost is 20,000 yuan or so per ton, and the tunnel cave yield of one month is 80 tons or so, according to most
Low defect rate 3% is calculated, and loses 2.4 tons every month, according to incompletely statistics, in the whole electronic ceramics industry of China as many as
100 tunnel caves, i.e., one month loss more than 400 ten thousand, 1 year close to 50,000,000 loss.Therefore, existing electronic ceramics product
In manufacturing process, because defect rate is too high and caused by economic loss it is huge, this problems demand solve.
The content of the invention
There is product for existing wax expelling furnace and burst the problem of rate is high, the present invention, which provides one kind, to avoid product from bursting completely
Energy-conserving and environment-protective de-waxing kiln, to solve the above problems, the present invention use following scheme：
A kind of de-waxing kiln, includes the first tunnel cave and the second tunnel cave of connection, and product is preheated by the second tunnel cave
The first tunnel cave is pushed into again after to 180 DEG C to 300 DEG C and held for some time.
It is used as the further improvement of above-mentioned technical proposal：
Pass through wind channel between the furnace bottom passage of second tunnel cave and the furnace bottom passage of the low-temperature zone of the first tunnel cave
The furnace bottom thermal current of first tunnel cave, the furnace bottom of the second tunnel cave is introduced to by air-introduced machine by connection.
Second tunnel cave be arranged in parallel with the first tunnel cave, output of products end and the first tunnel cave of the second tunnel cave
Product input between pass through the 3rd tunnel cave connect.
3rd tunnel cave is vertically arranged with the first tunnel cave and the second tunnel cave.
Second tunnel cave extends to be formed for the product input of the first tunnel cave, the first tunnel cave and the second tunnel cave
Form a whole piece tunnel cave.
The time range that product is walked in second tunnel cave is to be gone in product in the first tunnel cave in low-temperature zone
Walk time length 0.5-1.5 times.
A kind of de-waxing technique of de-waxing kiln described in utilization claim 1, the de-waxing technique include warm and
De-waxing process, the warm is between product is preheated to 180 DEG C -300 DEG C in the second tunnel cave and held for some time,
The de-waxing process is：Product after preheated insulation is heated up to the process that paraffin burning is excluded in the first tunnel cave.
It is used as the further improvement of above-mentioned technical proposal：
In the warm, the time range that product is walked in second tunnel cave is in the first tunnel in product
In kiln 0.5-1.5 times of travel time length in low-temperature zone.
The technical effects of the invention are that：
The present invention increases tunnel cave on the original basis so that product first carries out preheating insulation, extends original low-temperature zone and protects
The warm time, the complete de-waxing processing of high-temp combustion is carried out after insulation again；, can be well during preheating insulation (de-waxing of low temperature half)
Ensure that de-waxing product will not heat up in low-temperature range, so as to ensure that de-waxing product does not ftracture, greatly save production cost, drop
Low-loss, with huge economic benefit；The present invention need to only carry out structure of modification, overall knot on the basis of existing tunnel cave
Structure is simple, and improvement cost is low, it is easy to promote.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is another structural representation of the invention.
In figure：1st, the first tunnel cave；10th, low-temperature zone；2nd, the first propeller；3rd, the second tunnel cave；4th, wind channel；5th, air inducing
Machine；6th, the second propeller；7th, the 3rd tunnel cave；8th, triple screw.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings, how to apply skill to the present invention whereby
Art means solve technical problem, and reach the implementation process of technique effect and can fully understand and implement according to this.Need explanation
It is that, as long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, institute
The technical scheme of formation is within protection scope of the present invention.
Embodiment 1：As shown in figure 1, the de-waxing kiln of the present embodiment, including the first tunnel cave 1 of connection and the second tunnel
Kiln 3, product is pushed into the first tunnel cave again after being preheated to 180 DEG C to 300 DEG C and held for some time by the second tunnel cave 3
1.By increasing by the second tunnel cave 3, it can be ensured that product has enough soaking times, so as to avoid rear subsequent product de-waxing from bursting.
Wherein, the temperature range of preheating be 180 DEG C to 300 DEG C between any temperature value, such as 180 DEG C, 181 DEG C, 182 DEG C, 183
DEG C ... .298 DEG C, 299 DEG C, 300 DEG C etc..
Embodiment 2：As shown in figure 1, one end of the first tunnel cave 1 is product input and is provided with the first propeller 2, the
The other end of one tunnel cave 1 is output of products end；Also include the second tunnel cave 3, the output of products end and first of the second tunnel cave 3
The product input connection of tunnel cave 1, the product input of the second tunnel cave 3 is provided with the second propeller 6.Second tunnel cave 3
In product holding temperature be maintained at basically identical with the temperature of the low-temperature zone of the first tunnel cave 1, independent heating can be used
Device heating and thermal insulation, but in order to reduce energy consumption, the second tunnel cave 3 furnace bottom passage and the first tunnel cave 1 low-temperature zone 10 stove
Connected between the passage of bottom by wind channel 4, the furnace bottom thermal current of first tunnel cave 1 is introduced to the second tunnel by air-introduced machine 5
The furnace bottom of kiln 3 is to ensure that it is essentially identical or complete that the low-temperature zone 10 of holding temperature and the first tunnel cave 1 in the second tunnel cave 3 has
Consistent holding temperature.
In the present invention, the propeller used can also be substituted for prior art using other delivery devices.
In the present invention, in above-mentioned two embodiment, the arrangement of the second tunnel cave 3 and the first tunnel cave 1 is not restricted,
Under conditions of space is well-to-do, the head end of the first tunnel cave 1 is connected with the tail end of the second tunnel cave 3, generally forms a tunnel
Kiln (is not drawn into) in figure, but because tunnel cave is lengthened, the increase of adjacent product entire length, therefore needs that a load is big, high-power push away
Enter device to be promoted, also, when product naked light burns de-waxing, still can not avoid fire spreading to subsequent product；To avoid
Naked light spreads along adjacent product, as shown in Fig. 2 the second tunnel cave 3 can be arranged in a mutually vertical manner with the first tunnel cave 1, it is vertical to turn
At angle can completely cut off naked light, but need also exist for larger space arrangement.
To reduce the installing space of equipment, as shown in figure 1, in above-mentioned two embodiment, the second tunnel cave 3 and the first tunnel cave
1 is be arranged in parallel, and the 3rd tunnel cave 7 is passed through between the product input of the output of products end of the second tunnel cave 3 and the first tunnel cave 1
(passage that the 3rd tunnel cave 7 can be connected simply) connection, the connectivity part of the 3rd tunnel cave 7 and the second tunnel cave 3 is provided with
Triple screw 8.U-shape structure is formed between the low-temperature zone 10 of the first tunnel cave 1, the second tunnel cave 3 and the 3rd tunnel cave 7,
It integrally takes up space and greatly reduced, and beneficial to the furnace bottom that the furnace bottom hot-air of low-temperature zone 10 is introduced to the second tunnel cave 3, two
Connection between person is apart from short, easy construction.In use, due to the second tunnel cave 3 of increase, the 3rd tunnel cave 7, being pushed away by second
Enter device 6, the propeller 2 of triple screw 8 and first gradually to promote product, extend the preheating insulation time of product.Preferably,
Second tunnel cave 3, the length sum of the 3rd tunnel cave 7 and low-temperature zone 10 in the first tunnel cave 1 length it is of substantially equal, i.e., it is double
Extend the low-temperature insulation time of product.
The first tunnel cave 1 of the present invention, the arrangement between the second tunnel cave 3 also include that other are a variety of, only need to meet
Extend the product low-temperature insulation time, such as according to space needs, the junction between the first tunnel cave 1 and the second tunnel cave 3
With certain angle (non-90 degree) etc..
Show through present invention research, when the time range that product is walked in the second tunnel cave 3 is in the first tunnel in product
When in road kiln 1 0.5-1.5 times of travel time length in low-temperature zone 10, product can be avoided to burst phenomenon, preferably, at that time
Between multiple be 1 times when, energy-conservation again avoid product from bursting, improve de-waxing quality, it is to avoid burst substandard products generation.If original product is in list
Cryogenic hold-time is 12 hours in individual tunnel cave, after being improved through the present invention, is extended for 24 hours or so.During product preheating insulation
Between according to model, size of product etc. determine.
The present invention also provides the de-waxing technique using the tunnel wax expelling furnace in embodiment 1, and the de-waxing technique includes half de-waxing
Process (warm) and completely de-waxing process；Wherein, warm be product be preheated in the second tunnel cave 3 180 DEG C-
Between 300 DEG C and held for some time, in warm, the time range that product is walked in the second tunnel cave 3 is in product
In the first tunnel cave 1 in low-temperature zone 10 0.5-1.5 times of travel time length (travel time is according to size, model of product etc.
It is determined that).De-waxing process is：Product after preheated insulation is heated up to the process that paraffin burning is excluded in the first tunnel cave.This
In invention, during the de-waxing of low temperature (preheating) half, it can ensure that de-waxing product will not heat up in low-temperature range well, so that
Ensure that de-waxing product does not ftracture.
The present invention is by product within the temperature range of low-temperature zone is between 180 DEG C -300 DEG C, and extension soaking time (is preferably
Extend in original basis close to half the time), first carry out half de-waxing processing, after carry out the processing of high-temp combustion complete de-waxing again, can
Avoid finished product from ftractureing completely, greatly save production cost, reduction loss.
In the present invention, to improve output, two groups of tunnel caves can be combined, every group of tunnel cave includes the first tunnel
The tunnel cave 3 of kiln 1 and second.
In the present invention, the temperature of the low temperature space in increased second tunnel cave 3 on the basis of conventional tunnel kiln is kept also
Introduced at the high temperature in kiln when can be by being sintered from subsequent product, it is to avoid the temperature of 1 low-temperature zone of the first tunnel cave 10 is not enough
And the situation for having little time supply occurs, and save, not additional waste energy consumption.
Embodiment provided above is the better embodiment of the present invention, only illustrates the present invention for convenient, not to this hair
It is bright to make any formal limitation, any those of ordinary skill in the art, if putting forward skill not departing from the present invention
In the range of art feature, using the equivalent embodiment locally changed or modified made by disclosed technology contents, and
Without departing from the technical characteristic content of the present invention, in the range of still falling within the technology of the present invention feature.
Claims (8)
1. a kind of de-waxing kiln, it is characterised in that：The first tunnel cave (1) and the second tunnel cave (3) including connection, product passes through
Second tunnel cave (3) is preheated to after 180 DEG C to 300 DEG C and held for some time is pushed into the first tunnel cave (1) again.
2. according to the de-waxing kiln described in claim 1, it is characterised in that：The furnace bottom passage and first of second tunnel cave (3)
Connected between the furnace bottom passage of the low-temperature zone (10) of tunnel cave (1) by wind channel (4), by air-introduced machine (5) by the first tunnel
The furnace bottom thermal current of kiln (1) is introduced to the furnace bottom of the second tunnel cave (3).
3. de-waxing kiln according to claim 1, it is characterised in that：Second tunnel cave (3) and the first tunnel cave (1)
It is arranged in parallel, the 3rd tunnel is passed through between the output of products end of the second tunnel cave (3) and the product input of the first tunnel cave (1)
Kiln (7) is connected.
4. de-waxing kiln according to claim 3, it is characterised in that：3rd tunnel cave (7) and the first tunnel cave (1)
And second tunnel cave (3) be vertically arranged.
5. de-waxing kiln according to claim 1, it is characterised in that：Second tunnel cave (3) is the first tunnel cave (1)
Product input extend to be formed, the first tunnel cave (1) and the second tunnel cave (3) one whole piece tunnel cave of formation.
6. according to any described de-waxing kiln in claim 1-5, it is characterised in that：Product is in second tunnel cave (3)
The time range of middle walking be in product in the first tunnel cave (1) 0.5-1.5 times of travel time length in low-temperature zone (10).
7. a kind of de-waxing technique of the de-waxing kiln described in utilization claim 1, it is characterised in that：The de-waxing technique includes pre-
Thermal process and de-waxing process, the warm are between product is preheated to 180 DEG C -300 DEG C in the second tunnel cave (3) and protected
Warm certain time, the de-waxing process is：Product after preheated insulation is heated up to paraffin burning exclusion in the first tunnel cave
Process.
8. de-waxing technique according to claim 7, it is characterised in that：In the warm, product is in second tunnel
The time range of walking is the 0.5- in product travel time length in low-temperature zone (10) in the first tunnel cave (1) in road kiln (3)
1.5 again.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323087X | 2017-05-09 | ||
| CN201710323087 | 2017-05-09 |
Publications (1)
| Publication Number | Publication Date |
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| CN107062895A true CN107062895A (en) | 2017-08-18 |
Family
ID=59617696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710425382.6A Pending CN107062895A (en) | 2017-05-09 | 2017-06-07 | Energy-conserving and environment-protective de-waxing kiln and its de-waxing technique |
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| CN (1) | CN107062895A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007188A (en) * | 2017-12-21 | 2018-05-08 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic post sintering de-waxing |
| CN112050628A (en) * | 2020-09-15 | 2020-12-08 | 溆浦易锋精细瓷业有限责任公司 | Kiln for removing wax by using waste heat |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007188A (en) * | 2017-12-21 | 2018-05-08 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic post sintering de-waxing |
| CN108007188B (en) * | 2017-12-21 | 2024-03-26 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic sintering and dewaxing |
| CN112050628A (en) * | 2020-09-15 | 2020-12-08 | 溆浦易锋精细瓷业有限责任公司 | Kiln for removing wax by using waste heat |
| CN112050628B (en) * | 2020-09-15 | 2022-06-24 | 溆浦易锋精细瓷业有限责任公司 | Kiln for removing wax by using waste heat |
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