CN114251311B - Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method - Google Patents
Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method Download PDFInfo
- Publication number
- CN114251311B CN114251311B CN202010992314.XA CN202010992314A CN114251311B CN 114251311 B CN114251311 B CN 114251311B CN 202010992314 A CN202010992314 A CN 202010992314A CN 114251311 B CN114251311 B CN 114251311B
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- Prior art keywords
- valve
- fluidization
- anhydrous sodium
- air pump
- pump body
- 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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Links
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title claims abstract description 79
- 239000000843 powder Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005243 fluidization Methods 0.000 claims abstract description 72
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 26
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 6
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 238000004043 dyeing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses an air pump assembly and a control method for an automatic anhydrous sodium sulfate powder conveying system, wherein the air pump assembly comprises an air pump body which is vertically arranged, a feed valve is arranged at a feed inlet of the air pump body, a first feed valve is arranged on the outer wall of the air pump body, a fluidization tank is arranged at a discharge outlet of the air pump body, a venturi tube is arranged at one end of the fluidization tank, an extension tube is arranged at the other end of the fluidization tank, a nozzle is arranged at one end of the extension tube, which is close to the venturi tube, the nozzle corresponds to a suction chamber of the venturi tube in position, the other end of the extension tube is connected with a second feed valve, a gas distribution plate is arranged at the bottom of the fluidization tank, a plurality of small holes are formed in the gas distribution plate, a cavity is formed between the gas distribution plate and the bottom of the fluidization tank, and the fluidization valve is arranged at the bottom of the fluidization tank. Through the structure, the conveying process of the anhydrous sodium sulphate is rapid, the time existing in the air pump body and the fluidization tank is short, and no anhydrous sodium sulphate is accumulated and remained in the cavity of the air pump body and the fluidization tank, so that the pipeline is not blocked by crystallization or the discharge port is not blocked easily.
Description
Technical Field
The invention relates to the field of dyeing and finishing equipment, in particular to an air pump assembly for an automatic anhydrous sodium sulfate powder conveying system and a control method.
Background
In the current dyeing and finishing production, anhydrous sodium sulphate plays an extremely important role in the dyeing process, and the quality of the application effect directly influences the quality of a dyed cloth product. In the traditional dyeing process, the conveying of anhydrous sodium sulfate is mainly divided into two steps, firstly, the weight of anhydrous sodium sulfate is weighed, then, the weighed anhydrous sodium sulfate is conveyed to a dye vat, and then, the following three conveying modes occur: the first is a method of manual weighing and transportation, the second is a method of transporting the liquid into a water agent after weighing, and the third is a method of transporting the liquid in a powder form directly after weighing. The first conveying method requires a great deal of labor, and the anhydrous sodium sulphate is a toxic substance, which can cause adverse effects on human bodies; the dyeing bath ratio of the second conveying method is difficult to control, and the success rate of dyeing is easily affected; the third conveying method is characterized in that due to the fact that anhydrous sodium sulphate is wet and easy to crystallize, the phenomenon of filter element blockage and pipeline blockage is easy to occur during long-time conveying, and the filter element and the pipeline are required to be detached regularly to be thoroughly cleaned. The powder conveying is relatively easy to treat due to the defect, the other two conveying modes are gradually replaced, but the problem that the powder conveying is easy to cause crystallization blockage also reduces the production efficiency of a production line to a certain extent, and the problem needs to be solved.
Disclosure of Invention
The invention provides an air pump assembly for an automatic anhydrous sodium sulfate powder conveying system and a control method based on the anhydrous sodium sulfate powder conveying mode, and mainly solves the problem that blockage is easy to occur in the process of conveying anhydrous sodium sulfate powder by using an air pump.
In order to solve the technical problems, the invention discloses an air pump assembly for an automatic anhydrous sodium sulfate powder conveying system, which comprises an air pump body vertically arranged, wherein a feed valve is arranged at a feed inlet of the air pump body, the feed valve is used for being connected with a weighing hopper, a first feed valve is arranged on the outer wall of the air pump body, a fluidization tank is arranged at a discharge outlet of the air pump body, a venturi tube is arranged at one end of the fluidization tank, an extension tube is arranged at the other end of the fluidization tank, a nozzle is arranged at one end of the extension tube, which is close to the venturi tube, the position of the nozzle corresponds to the position of a suction chamber of the venturi tube, a diffuser end of the venturi tube is used for being connected with an air-powder separating mechanism, the other end of the extension tube is connected with a second feed valve, a gas distribution plate is arranged at the bottom of the fluidization tank, a plurality of small holes are formed in the gas distribution plate, a cavity is formed between the gas distribution plate and the bottom of the fluidization tank, the fluidization valve is arranged at the bottom of the fluidization tank, and the first feed valve, the second feed valve and the fluidization valve are all connected with an air compressor through a pipeline.
In some embodiments, a flexible connection is also included for connecting the feed valve and the weigh hopper.
In some embodiments, the flexible connector is a cloth bag.
In some embodiments, the feed valve is a pneumatic butterfly valve.
In some embodiments, the feed valve is a pneumatic ball valve.
In some embodiments, the fluidization valve is a pneumatic ball valve.
In some embodiments, the nozzle is a conical nozzle having an outer wall at a linear distance of 6mm from an inner wall of the venturi suction chamber and a throat of 22mm.
In some embodiments, the air pump body is funnel-shaped.
The invention also provides a control method of the air pump assembly, which is used for controlling the air pump assembly for the anhydrous sodium sulfate powder automatic conveying system and comprises the following steps:
firstly, a feed valve is opened, anhydrous sodium sulphate in a weighing hopper enters an air pump body, and the feed valve is closed;
secondly, opening a fluidization valve, and enabling compressed air to enter a fluidization tank, wherein under the action of air flow, anhydrous sodium sulphate and the compressed air generate fluidization;
third, opening the first feeding valve and the second feeding valve, and blowing out anhydrous sodium sulphate along the direction of the air pump body, the fluidization tank and the venturi tube along with air flow under the action of compressed air;
and step four, closing the fluidization valve, the first feeding valve and the second feeding valve, and finishing the conveying of the anhydrous sodium sulfate.
The beneficial effects of the invention are as follows: through setting up air pump body, the fluidization jar, and venturi tube-nozzle integrated configuration, under the normal pressure of first feed valve, anhydrous sodium sulfate in the air pump body will be to fluidization jar direction transmission, when opening the fluidization valve, the gas distribution board of fluidization jar bottom produces the updraft, it blows up to pile up anhydrous sodium sulfate bottom fluidization jar 4, anhydrous sodium sulfate is relative unsettled state, the extension pipe that second feed valve is connected carries compressed air to the nozzle, thereby make venturi tube-nozzle integrated configuration produce negative pressure, anhydrous sodium sulfate is finally blown out the fluidization jar, through above-mentioned structure, the transportation process of anhydrous sodium sulfate is rapid, there is the time weak point in air pump body, the fluidization jar, because no anhydrous sodium sulfate piles up in the cavity of air pump body, the fluidization jar remains, be difficult for producing crystallization and block up pipeline or discharge gate, need not often dismantle the machine and maintain, dyeing and finishing industry's production efficiency has been improved.
Drawings
FIG. 1 is a perspective view of a wind pump assembly for an automated delivery system for anhydrous sodium sulfate powder in accordance with one embodiment of the present invention;
fig. 2 is an enlarged view of a portion of fig. 1 along line a.
Wherein: 1-air pump body, 2-feed valve, 3-first feed valve, 4-fluidization tank, 5-venturi, 6-extension pipe, 7-nozzle, 8-second feed valve, 9-gas distribution plate, 10-cavity, 11-fluidization valve.
Detailed Description
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, so to speak, the two elements are communicated internally. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention. The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, this embodiment discloses a wind pump assembly for anhydrous sodium sulfate dry powder automatic conveying system, including vertical wind pump body 1 of placing, the pan feeding mouth of wind pump body 1 is equipped with feed valve 2, feed valve 2 is used for connecting the title hopper, the outer wall of wind pump body 1 is equipped with first feed valve 3, the discharge gate of wind pump body 1 is equipped with fluidization tank 4, the one end of fluidization tank 4 is equipped with venturi 5, the other end of fluidization tank 4 is equipped with extension pipe 6, the one end that extension pipe 6 is close to venturi 5 is equipped with nozzle 7, nozzle 7 corresponds with venturi 5's suction chamber's position, venturi 5's diffusion pipe end is used for connecting gas-powder separating mechanism, extension pipe 6's the other end is connected with second feed valve 8, fluidization tank 4's bottom is equipped with gas distribution plate 9, be equipped with a plurality of apertures on the gas distribution plate 9 and fluidization tank 4's bottom between be equipped with cavity 10, fluidization tank 4's bottom is equipped with fluidization valve 11, first feed valve 3, second feed valve 8 and fluidization valve 11 all are connected with the air compressor through the pipeline, the air compressor is provided with pressure, the steady air source of dry pressure, the pressure on the air compressor is provided.
As a further preferred embodiment of the invention, the pipes connected to the first feeding valve 3, the second feeding valve 8 and the fluidization valve 11 are connected to the output pipe of the air compressor through a four-way valve, so that the output end of the air compressor is saved.
According to the invention, through the arrangement of the air pump body 1, the fluidization tank 4 and the venturi tube 5-nozzle 7 combined structure, under the positive pressure of the first feeding valve 3, anhydrous sodium sulphate in the air pump body 1 is conveyed towards the fluidization tank 4, when the fluidization valve 11 is opened, the air distribution plate 9 at the bottom of the fluidization tank 4 generates ascending air flow to blow up the anhydrous sodium sulphate piled at the bottom of the fluidization tank 4, the anhydrous sodium sulphate is in a relatively suspended state, the extension tube 6 connected with the second feeding valve 8 conveys compressed air to the nozzle 7, so that the venturi tube 5-nozzle 7 combined structure generates negative pressure, and finally the anhydrous sodium sulphate is blown out of the fluidization tank 4.
In addition, the cavity 10 gives compressed air a certain buffer space, so that excessive pressure received by the anhydrous sodium sulphate is avoided, and the anhydrous sodium sulphate is blown back to the air pump body 1. The extension tube 6 is required to traverse the cavity of the fluidization tank 4 instead of the venturi 5 into the cavity of the fluidization tank 4.
In the above scheme, the feeding valve 2 is used for directly connecting the weighing hopper, and more preferably, the device further comprises a flexible connecting piece, wherein the flexible connecting piece is used for connecting the feeding valve and the weighing hopper, so that the descent process of the anhydrous sodium sulphate can be relatively stable. The flexible connecting piece is a cloth bag.
As a preferred embodiment of the present invention, the above-mentioned feed valve is a pneumatic butterfly valve, considering that anhydrous sodium sulphate is delivered in dry powder form. The feeding valve is a pneumatic ball valve, and the fluidization valve is a pneumatic ball valve.
As the most important invention point of the present invention, referring to fig. 2, the nozzle is a conical nozzle, the linear distance between the outer wall of the conical nozzle and the inner wall of the suction chamber of the venturi tube is 6mm, and the throat of the venturi tube is 22mm. At the ratio, the negative pressure is the largest, and the transmission effect of the anhydrous sodium sulphate is the best.
As a preferred embodiment of the present invention, the air pump body is funnel-shaped, and functions to allow anhydrous sodium sulphate to fall into the fluidization tank 4 by its own weight even under normal pressure without the first feed valve 3.
Example two
The embodiment discloses a control method of an air pump assembly, which is used for controlling the air pump assembly for the anhydrous sodium sulphate dry powder automatic conveying system and comprises the following steps:
firstly, a feed valve 2 is opened, anhydrous sodium sulphate in a weighing hopper enters an air pump body 1, and the feed valve 2 is closed;
secondly, opening a fluidization valve 11, and enabling compressed air to enter a fluidization tank 4, wherein under the action of air flow, the anhydrous sodium sulphate and the compressed air generate fluidization;
third, the first feeding valve 3 and the second feeding valve 8 are opened, and anhydrous sodium sulphate is blown out along the direction of the air pump body 1, the fluidization tank 4 and the venturi tube 5 along with air flow under the action of compressed air;
and fourthly, closing the fluidization valve 11, the first feeding valve 3 and the second feeding valve 8, and finishing the conveying of the anhydrous sodium sulphate dry powder.
Obviously, the fluidization valve 11, the first feeding valve 3 and the second feeding valve 8 are opened/closed simultaneously under normal operation of the air pump assembly.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. The utility model provides a wind pump assembly for anhydrous sodium sulfate dry powder automatic conveying system, its characterized in that includes the wind pump body of vertical placement, the pan feeding mouth of wind pump body is equipped with the feed valve, the feed valve is used for connecting the title hopper, the outer wall of wind pump body is equipped with first feed valve, the discharge gate of wind pump body is equipped with the fluidization jar, the one end of fluidization jar is equipped with venturi, the other end of fluidization jar is equipped with the extension pipe, the extension pipe is close to the one end of venturi is equipped with the nozzle, the nozzle corresponds with the position of venturi's suction chamber, the diffusion pipe end of venturi is used for connecting gas-powder separating mechanism, the other end of extension pipe is connected with the second feed valve, the bottom of fluidization jar is equipped with the gas distribution board, be equipped with a plurality of apertures on the gas distribution board with be equipped with the cavity between the bottom of fluidization jar, the bottom of fluidization jar is equipped with the fluidization valve, first feed valve, second feed valve and fluidization valve all are connected with air compressor through the pipeline; the nozzle is a conical nozzle, the linear distance between the outer wall of the conical nozzle and the inner wall of the venturi suction chamber is 6mm, and the throat of the venturi is 22mm; the air pump body is funnel-shaped.
2. The air pump assembly for an automated dry powder delivery system of claim 1, further comprising a flexible connector for connecting the feed valve and the weigh hopper.
3. The air pump assembly for an automated delivery system of anhydrous sodium sulfate powder of claim 2, wherein the flexible connector is a cloth bag.
4. The air pump assembly for an automated delivery system of anhydrous sodium sulfate powder of claim 1, wherein the feed valve is a pneumatic butterfly valve.
5. The air pump assembly for an automated delivery system of anhydrous sodium sulfate powder of claim 1, wherein the feed valve is a pneumatic ball valve.
6. The air pump assembly for an automated delivery system of anhydrous sodium sulfate powder of claim 1, wherein the fluidization valve is a pneumatic ball valve.
7. A method of controlling a wind pump assembly according to any one of claims 1 to 6, comprising the steps of:
firstly, a feed valve is opened, anhydrous sodium sulphate in a weighing hopper enters an air pump body, and the feed valve is closed;
secondly, opening a fluidization valve, and enabling compressed air to enter a fluidization tank, wherein under the action of air flow, anhydrous sodium sulphate and the compressed air generate fluidization;
third, opening the first feeding valve and the second feeding valve, and blowing out anhydrous sodium sulphate along the direction of the air pump body, the fluidization tank and the venturi tube along with air flow under the action of compressed air;
and step four, closing the fluidization valve, the first feeding valve and the second feeding valve, and finishing the conveying of the anhydrous sodium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010992314.XA CN114251311B (en) | 2020-09-21 | 2020-09-21 | Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010992314.XA CN114251311B (en) | 2020-09-21 | 2020-09-21 | Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114251311A CN114251311A (en) | 2022-03-29 |
| CN114251311B true CN114251311B (en) | 2024-03-22 |
Family
ID=80788197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010992314.XA Active CN114251311B (en) | 2020-09-21 | 2020-09-21 | Air pump assembly for anhydrous sodium sulfate dry powder automatic conveying system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114251311B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB879303A (en) * | 1959-07-13 | 1961-10-11 | A R B E D Acieries Reunies De | Putting finely divided material in suspension in a gaseous carrier |
| JPH06286872A (en) * | 1993-04-05 | 1994-10-11 | Nordson Kk | Powder/grain pneumatic transport method, transport temporary stop method and device therefor |
| US5857838A (en) * | 1997-04-09 | 1999-01-12 | Lockheed Martin Idaho Technologies Company | Water cooled steam jet |
| CN101142030A (en) * | 2005-03-18 | 2008-03-12 | 艾森曼设备制造有限及两合公司 | Device for guiding powdery fluidic media |
| CN101563167A (en) * | 2006-08-04 | 2009-10-21 | 艾森曼设备制造有限及两合公司 | Powder pump with vacuum filling |
| CH701956A1 (en) * | 2009-10-06 | 2011-04-15 | Frei Engineering Ag | Device for application of powder lacquer for coating e.g. three part canned body, has discharge line that sprays fluidization powder, and vacuum area directly connected with powder in container |
| CN103691215A (en) * | 2013-12-13 | 2014-04-02 | 郑州东方安彩耐火材料有限公司 | Heat preservation powder negative pressure recycling system in production of refractory material by using fusion casting method |
| CN203694630U (en) * | 2013-12-16 | 2014-07-09 | 宁波广博纳米新材料股份有限公司 | Atomization feeder |
-
2020
- 2020-09-21 CN CN202010992314.XA patent/CN114251311B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB879303A (en) * | 1959-07-13 | 1961-10-11 | A R B E D Acieries Reunies De | Putting finely divided material in suspension in a gaseous carrier |
| JPH06286872A (en) * | 1993-04-05 | 1994-10-11 | Nordson Kk | Powder/grain pneumatic transport method, transport temporary stop method and device therefor |
| US5857838A (en) * | 1997-04-09 | 1999-01-12 | Lockheed Martin Idaho Technologies Company | Water cooled steam jet |
| CN101142030A (en) * | 2005-03-18 | 2008-03-12 | 艾森曼设备制造有限及两合公司 | Device for guiding powdery fluidic media |
| CN101563167A (en) * | 2006-08-04 | 2009-10-21 | 艾森曼设备制造有限及两合公司 | Powder pump with vacuum filling |
| CH701956A1 (en) * | 2009-10-06 | 2011-04-15 | Frei Engineering Ag | Device for application of powder lacquer for coating e.g. three part canned body, has discharge line that sprays fluidization powder, and vacuum area directly connected with powder in container |
| CN103691215A (en) * | 2013-12-13 | 2014-04-02 | 郑州东方安彩耐火材料有限公司 | Heat preservation powder negative pressure recycling system in production of refractory material by using fusion casting method |
| CN203694630U (en) * | 2013-12-16 | 2014-07-09 | 宁波广博纳米新材料股份有限公司 | Atomization feeder |
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| Publication number | Publication date |
|---|---|
| CN114251311A (en) | 2022-03-29 |
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