CN107764038A - A kind of furnace refractory furnace drying method - Google Patents
A kind of furnace refractory furnace drying method Download PDFInfo
- Publication number
- CN107764038A CN107764038A CN201710918888.0A CN201710918888A CN107764038A CN 107764038 A CN107764038 A CN 107764038A CN 201710918888 A CN201710918888 A CN 201710918888A CN 107764038 A CN107764038 A CN 107764038A
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- Prior art keywords
- furnace
- stove
- turbine
- interior stove
- compression wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
Abstract
The present invention relates to furnace refractory technical field,Disclose a kind of furnace refractory furnace drying method,Furnace charge drying is carried out using furnace charge drying unit,Furnace charge drying unit includes frame,Interior stove,Outer stove,Air blower and turbocharger,Outer stove is fixedly mounted in frame,Outer boiler clothing is on the outside of interior stove,Flow cavity is formed between interior stove and outer stove,Interior stove is fixedly mounted on outer stove,The side wall of interior stove and top are equipped with the steam vent connected with flow cavity,The rotating shaft being fixedly connected with the turbine of turbocharger is provided with interior stove,The spiral electric circle for heating is fixed with interior stove and the side wall of rotating shaft,The compression wheel air inlet of turbocharger connects with air blower gas outlet,The turbine air entry of turbocharger connects with flow cavity,Inner chamber is provided with rotating shaft,Inner chamber connects with the compression wheel gas outlet of turbocharger,Compression wheel gas outlet is fixed with heating plate,Intracavity sidewall is provided with the hot blast hole connected with interior stove.The present invention carries out flash baking, good drying effect to furnace charge.
Description
Technical field
The present invention relates to furnace refractory technical field, and in particular to a kind of furnace refractory furnace drying method.
Background technology
Need to be dried in present metallurgical industry, when substantial amounts of furnace charge is used, to reach away wherein moisture
Purpose.And existing furnace drying method is to carry out drying and processing using a kind of single drying baker of function.In the prior art, to make
The moisture discharge of furnace charge evaporation, exhaust vent is set at the top of baking oven, and connecting air exhauster on exhaust vent extracts moisture out, but this
Kind, which is set, causes the moisture close to exhaust vent to be easily evacuated, and the moisture away from exhaust vent is not easy to discharge, and moisture is in part
Region clustering has a great influence to the quality of the position furnace charge, and the wind speed of air-out hole site is very fast, causes the temperature in the region
It is relatively low, have impact on furnace charge on the region heated baking heated compared with other regions it is uneven.
It is to solve the existing notification number of problem present in drying course：The patent of invention of " CN104596211A ", it is public
A kind of furnace charge baking oven, including body of heater, fire door, heater and air exhauster are driven, body of heater includes inner furnace body and external furnace body, external furnace body
Side is provided with installing port, and inner furnace body is fitted into external furnace body from installing port, and the side of inner furnace body and installing port homonymy is provided with opening,
Fire door is used to, by closure of openings, form ventilation gap, each side wall of inner furnace body between the outer wall of inner furnace body and the inwall of external furnace body
On be equipped with suction hole, air exhauster is provided with escape pipe, and escape pipe connects the ventilation gap.The program can incite somebody to action from surrounding
The moisture baked out is discharged from suction hole.But during long-term use, find furnace charge in the middle part of moisture discharge amount compared with
It is few, set heater uniformly to heat furnace charge in bottom, so as to cause the quality of furnace charge not increase significantly.
The content of the invention
It is an object of the invention to provide a kind of furnace refractory furnace drying method, and to solve, furnace charge drying heating is uneven to ask
Topic.
To reach above-mentioned purpose, the technical scheme is that：A kind of furnace refractory furnace drying method, is dried using a kind of furnace charge
Equipment for drying carries out furnace charge drying, and furnace charge drying unit includes frame, interior stove, outer stove, air blower and turbocharger, and its feature exists
In the outer stove is fixedly mounted in frame, and outer boiler clothing forms flow cavity on the outside of interior stove between interior stove and outer stove, described
Interior stove is fixedly mounted on outer stove, and the side wall of interior stove and top are equipped with steam vent connect with flow cavity, in interior stove provided with
The rotating shaft that the turbine of turbocharger is fixedly connected, rotating shaft are rotatablely connected with interior stove, and use is fixed with the side wall of interior stove and rotating shaft
In the spiral electric circle of heating, the compression wheel air inlet of the turbocharger connects with air blower gas outlet, turbocharger
Turbine air entry is connected with flow cavity, and the compression wheel gas outlet of inner chamber, the inner chamber and turbocharger is provided with the rotating shaft
Connection, compression wheel gas outlet are fixed with heating plate, and the intracavity sidewall is provided with the hot blast hole connected with interior stove；
Pass through the drying of the complete furnace refractory of following steps：
Step 1：Put the powdered furnace refractory for needing to dry into interior stove and place 1 ~ 2h；
Step 2：Start spiral electric circle, and heating-up temperature is adjusted to 500 DEG C ~ 700 DEG C furnace refractory is heated；
Step 3：Restart air blower, be 980 ~ 1480r/min by the rotational speed regulation of air blower；
Step 4：Waiting air blower to work 0.5 ~ 1h, complete drying work, close spiral electric circle, air blower works on 10 ~
20min；
Step 5：Air blower is closed, takes out the furnace refractory dried.
The technical principle of the present invention：
Step 1：The furnace charge that will be dried is placed in interior stove, and furnace charge places 1 ~ 2h in interior stove so that furnace charge in interior stove from
Row carries out the discharge of moisture, and the moisture of discharge is entered in flow cavity by steam vent, and moisture can enter whirlpool with air
Take turns in booster, the preliminary amount for reducing moisture.
Step 2：Start spiral electric circle, the heating-up temperature of spiral electric circle brings up to 500 ~ 700 DEG C, and high temperature is carried out to furnace charge
Heating, drying and the impurity such as the wood chip in furnace charge forge removing.
Step 3：Start air blower, and be that 980 ~ 1480r/min leads to compression wheel air inlet by the rotational speed regulation of air blower
Enter enough gas, gas enters in compression wheel housing, gas can promote compression wheel rotated after gas discharge compression wheel
Housing, the intracavitary in the heating of compression wheel air inlet is sent into afterwards.Compression wheel, which rotates, to promote rotary shaft to rotate, and rotary shaft can drive
Turbine rotation, turbine rotation can pass through turbine air entry air-breathing.Turbine rotation can also drive rotating shaft to be rotated, the rotating shaft of rotation
Furnace charge can be stirred, and the spiral electric circle in rotating shaft side wall can carry out heating, drying, interior furnace sidewall to furnace charge
The spiral electric circle of installation also can carry out heating, drying to furnace charge.By the stirring of rotating shaft, furnace charge can be uniformly heated in interior stove to be dried
It is dry.The furnace charge of drying can evaporate substantial amounts of moisture, interior stove can be entered by hot blast hole into the hot blast in inner chamber, hot blast is internal
The moisture of stove is blown, and accelerates moisture to enter in flow cavity.Turbine air entry connects with flow cavity, and interior stove passes through steam vent
Connected with flow cavity, the flowing of formation gas under the suction of turbine air entry, the moisture in interior stove can pass through steam vent
Flow cavity is entered, is siphoned away by turbine.
Step 4：Air blower 0.5 ~ 1h of work coordinates with spiral electric circle, and sufficient uniform stirring heating has been carried out to furnace charge,
Drying work is completed, air blower works on 10 ~ 20min, and air blast cools to furnace charge.
Step 5：The furnace charge to be cooled by step 4, when being taken out from interior stove, will not cause environment temperature too high.
Beneficial effects of the present invention：（1）Be placed on by furnace charge in interior stove carry out voluntarily moisture volatilization, reduce furnace charge with
The contact of moisture in air, reduce the humidity of furnace charge.
（2）Spiral electric circle is set in spiral electric circle and interior furnace sidewall by being set in rotating shaft side wall, furnace charge is stirred in rotating shaft
Being capable of thermally equivalent during mixing.The moisture in the middle part of furnace charge is also discharged by stirring so that furnace charge hydrofuge is uniform, improves furnace charge
Effect.
（3）By the stirring of rotating shaft, the contact area of furnace charge can be increased, so as to accelerate the velocity of discharge of moisture, improve stove
The drying efficiency of material, improve operating efficiency.
（4）Pass through the suction of turbine air entry so that interior stove forms the flowing of gas, accelerates moisture and enters flow cavity
Speed, further improve except moisture ability, raising remove moisture effect.
On above base case：
Preferred scheme one：The rotating shaft is provided with the agitator connected by planetary gear train, and planetary gear train includes sun gear, planet
Frame, gear ring and the planetary gear engaged respectively with sun gear and gear ring, sun gear are fixed on interior stove, planet carrier by a fixing axle
It is fixedly connected with rotating shaft, agitator is fixed on gear ring, makes agitator accelerate to rotate by planetary gear train.Stirred by planetary gear train
Mixing device can accelerate to rotate under the drive of rotating shaft, swirling air-flow be formed when agitator rotates, swirling air-flow is wet by interior stove
Gas is blown out by the steam vent of surrounding under the influence of centrifugal force, and the hot blast that the moisture of interior stove is reduced and can accelerated in inner chamber enters
Enter the drying to interior stove, accelerated to furnace charge.
Preferred scheme two：The interior furnace bottom is provided with the first plate being slidably connected with interior stove, and the first plate is provided with and flowing
The steam vent of chamber connection, the outer furnace bottom are provided with the second plate being fixedly connected with the first plate, and the second plate is slidably connected with outer stove.
Moisture can be discharged by the steam vent set on the first plate, further speed up the speed of discharge moisture.In blowing and feeding,
By the second plate promote the first plate furnace charge can be sent into stove, go material when, by the second plate pull the first plate furnace charge can be taken out,
Compared with traditional direct blowing mode, by the cooperation of the first plate and the second plate, the damage of furnace charge can be reduced.
Preferred scheme three：The rotational speed regulation of the air blower of the step 4 is 980r/min.Reduce the rotating speed of air blower, section
About electric energy, furnace charge is cooled, accelerate the taking-up of furnace charge, improve operating efficiency.
Preferred scheme four：The air blower of the step 3 starts after during the spiral electric circle of step 2 works 10 ~ 20min.
Spiral electric circle first carries out pre-heating drying to furnace charge, discharges certain moisture.
Preferred scheme five：The frame is provided with collecting box, and turbine gas outlet and the collecting box of the turbocharger connect
It is logical.Focus in drying course, waste gas caused by furnace charge.
Brief description of the drawings
Fig. 1 is furnace charge drying unit overall structure diagram.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Reference is：Outer stove 1, interior stove 2, flow cavity 3, the second plate 4, the first plate 5, rotating shaft 6, compression wheel air inlet 7, turbine are inhaled
Gas port 8, agitator 9, planetary gear train 10, steam vent 11, hot blast hole 12, connecting rod 13, inner chamber 14, air inlet pipe 15, escape pipe 16.
Embodiment 1：
As shown in figure 1, a kind of furnace refractory furnace drying method, is dried using furnace charge drying unit, furnace charge drying unit includes
Frame, interior stove 2, outer stove 1, air blower and turbocharger, turbocharger include compression wheel housing and turbine shroud, compression wheel
Housing includes compression wheel air inlet 7 and compression wheel gas outlet, and compression wheel, compression wheel and compression wheel housing are provided with compression wheel housing
Rotation connection, turbine shroud include turbine air entry 8 and turbine exhaust mouth, turbine, turbine and turbine case are provided with turbine shroud
Body is rotatablely connected, and turbine is fixedly connected with compression wheel by rotary shaft.Outer stove 1 is fixedly mounted in frame and outer stove 1 be arranged with
The interior outside of stove 2, forms flow cavity 3 between interior stove 2 and outer stove 1.Interior stove 2 is fixedly mounted on outer stove 1, the interior bottom of stove 2 be provided with
The first plate 5 that interior stove 2 is slidably connected, side wall, top and the first plate 5 of interior stove 2 are provided with what is connected with interior stove 2 and flow cavity 3
Steam vent 11, the outer bottom of stove 1 are provided with the second plate 4 being fixedly connected with the first plate 5 by connecting rod 13, and the second plate 4 is slided with outer stove 1
Dynamic connection, the lower section of the second plate 4 are fixed with the cylinder for promoting the second plate 4.
The rotating shaft 6 being fixedly connected with the turbine of turbocharger is provided with interior stove 2, rotating shaft 6 is rotatablely connected with interior stove 2, interior
The spiral electric circle for heating is fixed with stove 2 and the side wall of rotating shaft 6.It is provided with to go out with the compression wheel of turbocharger in rotating shaft 6
The inner chamber 14 of gas port connection, compression wheel gas outlet are connected by air inlet pipe 15 with inner chamber 14, and compression wheel gas outlet, which is fixed with, to be used for
The heating plate of hot gas, the side wall of inner chamber 14 are provided with the hot blast hole 12 connected with interior stove 2.Rotating shaft 6, which is provided with, passes through planetary gear train
The agitators 9 of 10 connections, agitator 9 have a certain distance from furnace charge, planetary gear train 10 include sun gear, planet carrier, gear ring and
The planetary gear engaged with sun gear and gear ring, sun gear are fixed on interior stove 2 by a fixing axle, and planet carrier is solid with rotating shaft 6
Fixed connection, agitator 9 are fixed on gear ring, can be accelerated to rotate under the drive of rotating shaft 6 by the agitator 9 of planetary gear train 10, be turned
Dynamic speed is more than the velocity of rotation of rotating shaft 6.The compression wheel air inlet 7 of turbocharger connects with air blower gas outlet, and turbine increases
The turbine air entry 8 of depressor is connected by escape pipe 16 with flow cavity 3, and fixed be removably connected with focuses on waste gas in frame
Collecting box, the turbine exhaust mouth of turbocharger connects with collecting box.
The drying of furnace refractory is completed by following steps：
Step 1：Start cylinder, cylinder slide downward on outer stove 1 by the second plate 4, the second plate 4 drives the by connecting rod 13
One plate 5 slide downward on interior stove 2, so as to open interior stove 2 and outer stove 1.Furnace charge is placed on the first sheet 5, placement finishes it
After be again started up cylinder counter motion, interior stove 2 and outer stove 1 are closed by the first plate 5 and the second plate 4.Furnace charge is put in interior stove
1h is put, furnace charge voluntarily carries out the volatilization of moisture in interior stove, and the moisture of volatilization is entered in flow cavity 3 by steam vent, moisture
Meeting flowing into turbocharger with air, the preliminary amount for reducing moisture.
Step 2：Start spiral electric circle, and the temperature of spiral electric circle is brought up to 600 DEG C, spiral electric circle is in rotating shaft 6 and interior
The side wall of stove 2 heats to furnace charge, and the middle part and outside for making furnace charge can be heated.High temperature is heated and right to furnace charge
The impurity such as the wood chip in furnace charge forge removing.
Step 3：After spiral electric circle work 20min, start air blower, and be 1480r/min by the rotational speed regulation of air blower
Substantial amounts of gas is blasted to compression wheel air inlet 7, gas can promote compression wheel to be rotated, and the compression wheel of rotation can drive rotation
Axle is rotated, and so as to which rotary shaft can drive turbine rotation, turbine rotation can drive rotating shaft 6 to rotate.Rotating shaft 6 rotates can be to furnace charge
It is stirred so that the heated contact area increase of furnace charge, so as to accelerate the volatilization of furnace charge moisture, improve drying effect.Turn
Axle 6 can drive agitator 9 to rotate, and the velocity of rotation in the presence of planetary gear train 10 of agitator 9 is faster than the velocity of rotation of rotating shaft 6,
The quick rotation of agitator 9 can form swirling air-flow, and the swirling air-flow of formation forms centrifugal force and passes through the moisture of interior stove 2
The steam vent 11 of surrounding is blown out and the moisture of interior stove 2 can be reduced, and the interior moisture of stove 2 is reduced can accelerate in the presence of atmospheric pressure
Hot blast in inner chamber 14 enters interior stove 2 and accelerates the drying to furnace charge.Hot blast can take away the moisture of interior stove 2 simultaneously, in quickening
The moisture of stove 2 is discharged in flow cavity 3, strengthens the effect of hydrofuge gas.
Compression wheel exhaust outlet is connected by air inlet pipe 15 with inner chamber 14, and the wind of air blower bulging is added in compression wheel exhaust outlet
Backing heats, and enters in inner chamber 14, and the swirl shape air-flow that agitator 9 is formed blows away moisture so that and the gas of interior stove 2 is reduced,
Hot blast can be accelerated in the presence of compression wheel and agitator 9 to enter in interior stove 2 by inner chamber 14 and hot blast hole 12, the side of hot blast one
Face can heat to furnace charge, on the other hand can blow moisture and be entered by steam vent 11 in flow cavity 3, accelerate moisture
The velocity of discharge, strengthen the discharge effect of moisture.
Turbine rotation can be connected by the air-breathing of turbine air entry 8, turbine air entry 8 by escape pipe 16 with flow cavity 3, whirlpool
Wheel air entry 8 can produce suction so that forming air-flow in flow cavity 3, and the moisture that flow cavity 3 is entered from interior stove 2 is inhaled
Enter in turbine shroud, then entered by turbine exhaust mouth in collecting box and be collected.
Step 4：Air blower work 0.5h is waited, drying work is completed and closes spiral electric circle and heating plate, by air blast
The rotational speed regulation of machine is that the 980r/min 20min that work on cool to the furnace charge of drying.
Step 5：Air blower is closed, is opened the first plate 4 and the second plate 5 by cylinder, carries out feeding.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without departing from the inventive concept of the premise, several modifications and improvements can also be made, these should also be considered as the guarantor of the present invention
Scope is protected, these effects and practical applicability for implementing all without the influence present invention.The present invention omits the technology of description, shape
Shape, construction part are known technology.
Claims (6)
1. a kind of furnace refractory furnace drying method, it is characterised in that carry out furnace charge drying, furnace charge drying dress using furnace charge drying unit
Put including frame, interior stove, outer stove, air blower and turbocharger, turbocharger includes compression wheel housing and turbine shroud, pressure
Contracting wheel housing includes compression wheel air inlet and compression wheel gas outlet, compression wheel, compression wheel and compression wheel being provided with compression wheel housing
Housing into rotation connects, and turbine shroud includes turbine air entry and turbine exhaust mouth, and turbine, turbine and turbine are provided with turbine shroud
Housing into rotation is connected, and turbine is fixedly connected with compression wheel by rotary shaft, and the outer stove is fixedly mounted in frame, and outer boiler clothing is set
On the outside of interior stove, flow cavity is formed between interior stove and outer stove, the interior stove is fixedly mounted on outer stove, the side wall of interior stove and top
The steam vent connected with flow cavity is equipped with, the rotating shaft being fixedly connected with turbine is provided with interior stove, rotating shaft is rotatablely connected with interior stove,
The spiral electric circle for heating is fixed with interior stove and the side wall of rotating shaft, the compression wheel air inlet connects with air blower gas outlet
Logical, turbine air entry is connected with flow cavity, and inner chamber is provided with the rotating shaft, and the inner chamber connects with compression wheel gas outlet, compression
Wheel gas outlet is fixed with heating plate, and the intracavity sidewall is provided with the hot blast hole connected with interior stove；
Pass through the drying of the complete furnace refractory of following steps：
Step 1：Put the powdered furnace refractory for needing to dry into interior stove and place 1 ~ 2h；
Step 2：Start spiral electric circle, and heating-up temperature is adjusted to furnace refractory and heated；
Step 3：Restart air blower, be 980 ~ 1480r/min by the rotational speed regulation of air blower；
Step 4：Waiting air blower to work 0.5 ~ 1h, complete drying work, close spiral electric circle, air blower works on 10 ~
20min；
Step 5：Air blower is closed, takes out the furnace refractory dried.
2. furnace refractory furnace drying method according to claim 1, it is characterised in that the rotating shaft, which is provided with, passes through planetary gear
It is the agitator of connection, planetary gear train includes sun gear, planet carrier, gear ring and the planet engaged respectively with sun gear and gear ring
Wheel, sun gear are fixed on interior stove by a fixing axle, and planet carrier is fixedly connected with rotating shaft, and agitator is fixed on gear ring.
3. furnace refractory furnace drying method according to claim 1, it is characterised in that the interior furnace bottom is provided with to be slided with interior stove
First plate of dynamic connection, the first plate are provided with the steam vent connected with flow cavity, and the outer furnace bottom is provided with and fixed with the first plate
Second plate of connection, the second plate are slidably connected with outer stove.
4. furnace refractory furnace drying method according to claim 1, it is characterised in that the rotating speed of the air blower of the step 4
It is adjusted to 980r/min.
5. furnace refractory furnace drying method according to claim 1, it is characterised in that the air blower of the step 3 is in step
Start after in two 10 ~ 20min of spiral electric circle work.
6. furnace refractory furnace drying method according to claim 1, it is characterised in that the frame is provided with collecting box, institute
Turbine gas outlet is stated to connect with collecting box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918888.0A CN107764038A (en) | 2017-09-30 | 2017-09-30 | A kind of furnace refractory furnace drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710918888.0A CN107764038A (en) | 2017-09-30 | 2017-09-30 | A kind of furnace refractory furnace drying method |
Publications (1)
| Publication Number | Publication Date |
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| CN107764038A true CN107764038A (en) | 2018-03-06 |
Family
ID=61266964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710918888.0A Pending CN107764038A (en) | 2017-09-30 | 2017-09-30 | A kind of furnace refractory furnace drying method |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858623A (en) * | 2018-07-02 | 2018-11-23 | 张阳康 | A kind of timber processing sawdust processing unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309396A (en) * | 1995-05-22 | 1996-11-26 | Ishigaki Mech Ind Co | Vacuum drying device and drying method for slurry and the like |
| CN204705141U (en) * | 2015-06-05 | 2015-10-14 | 宁波欧瑞特聚合物有限公司 | The drying equipment of a kind of inorganic particle and powder |
| CN106381553A (en) * | 2015-04-24 | 2017-02-08 | 浙江美丝邦化纤有限公司 | Production method of functional polyamide 6 fiber |
| CN106524681A (en) * | 2016-11-18 | 2017-03-22 | 天津苏福聚塑料科技有限公司 | Novel drying device for engineering plastic |
| CN206368946U (en) * | 2016-11-28 | 2017-08-01 | 彭世昌 | Many power planetary mechanism stepless gear systems and buncher |
-
2017
- 2017-09-30 CN CN201710918888.0A patent/CN107764038A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309396A (en) * | 1995-05-22 | 1996-11-26 | Ishigaki Mech Ind Co | Vacuum drying device and drying method for slurry and the like |
| CN106381553A (en) * | 2015-04-24 | 2017-02-08 | 浙江美丝邦化纤有限公司 | Production method of functional polyamide 6 fiber |
| CN204705141U (en) * | 2015-06-05 | 2015-10-14 | 宁波欧瑞特聚合物有限公司 | The drying equipment of a kind of inorganic particle and powder |
| CN106524681A (en) * | 2016-11-18 | 2017-03-22 | 天津苏福聚塑料科技有限公司 | Novel drying device for engineering plastic |
| CN206368946U (en) * | 2016-11-28 | 2017-08-01 | 彭世昌 | Many power planetary mechanism stepless gear systems and buncher |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858623A (en) * | 2018-07-02 | 2018-11-23 | 张阳康 | A kind of timber processing sawdust processing unit |
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Application publication date: 20180306 |
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