CN113333760A - Method for improving spraying discharge rate - Google Patents
Method for improving spraying discharge rate Download PDFInfo
- Publication number
- CN113333760A CN113333760A CN202110548841.6A CN202110548841A CN113333760A CN 113333760 A CN113333760 A CN 113333760A CN 202110548841 A CN202110548841 A CN 202110548841A CN 113333760 A CN113333760 A CN 113333760A
- Authority
- CN
- China
- Prior art keywords
- spray
- hard alloy
- spray nozzle
- wet grinding
- aperture
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005507 spraying Methods 0.000 title claims description 18
- 239000007921 spray Substances 0.000 claims abstract description 63
- 239000000956 alloy Substances 0.000 claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 33
- 238000001238 wet grinding Methods 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005469 granulation Methods 0.000 abstract description 2
- 230000003179 granulation Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical group CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000001694 spray drying Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
Classifications
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/026—Spray drying of solutions or suspensions
Abstract
The invention relates to the technical field of hard alloy spray granulation, in particular to a method for improving the spray discharging rate, which comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology. The invention controls the liquid-solid ratio in a certain range, limits the stirring rotating speed and the spray nozzle aperture, and has remarkable effect of improving the discharging rate.
Description
Technical Field
The invention relates to the technical field of hard alloy spray granulation, in particular to a method for improving spray discharging rate.
Background
At present, in the production process of the hard alloy, the ball milling medium for spray drying and granulating the hard alloy is hexane, and the wettability of the hexane and WC is poor. A stable suspension cannot be formed. In addition, the hard alloy powder has high density, and the phenomenon of layering is easy to occur if the spraying process is improperly controlled. After the mixture slurry is precipitated and layered, the concentration distribution of the slurry is extremely uneven, the particle thickness is uneven, insufficient spray drying, wall attachment of the slurry and increase of dust collection amount can be caused seriously, and the spray discharging rate is extremely low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for improving the spray discharging rate.
The technical problem to be solved by the invention is as follows:
a method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
In some possible embodiments, the wet milling media is added with cemented carbide mix and milled to a liquid-to-solid ratio of: 280-450 ml/kg.
In some possible embodiments, the stirring speed of the spraying stirring tank is 270-460 r/min.
In some possible embodiments, the pressure range of the spray nozzle pressure is: 8.5 to 12 bar.
In some possible embodiments, the aperture of the spray nozzle is 1.0-1.6 mm.
In some possible embodiments, the wet-milled slurry comprises, by weight: 500-800 kg.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the liquid-solid ratio is controlled within a certain range, and the stirring speed and the spray nozzle aperture are limited, so that the discharge rate is improved with a remarkable effect;
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it should be apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "first," "second," and similar words, does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts.
To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present invention will be further described with reference to the following examples.
The invention is realized by the following technical scheme,
a method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
In some possible embodiments, the wet milling media is added with cemented carbide mix and milled to a liquid-to-solid ratio of: 280-450 ml/kg.
In some possible embodiments, the stirring speed of the spraying stirring tank is 270-460 r/min.
In some possible embodiments, the pressure range of the spray nozzle pressure is: 8.5 to 12 bar.
In some possible embodiments, the aperture of the spray nozzle is 1.0-1.6 mm.
In some possible embodiments, the wet-milled slurry comprises, by weight: 500-800 kg.
The invention controls the liquid-solid ratio in a certain range, has obvious effect on improving the spray discharging rate, has too large liquid-solid ratio, is easy to cause insufficient drying and more fine powder, and increases spray wall-attaching materials and dust collecting materials. The liquid-solid ratio is too small, so that excessive drying is easy to occur, particles are crushed, fine powder is added, dust collection materials are added, and the discharging rate is reduced.
According to the invention, by controlling the spraying and stirring speed, the spraying slurry is fully and uniformly stirred to form stable suspension, incomplete spray drying and fine particle powder caused by slurry precipitation can be reduced, so that spray wall materials and dust collecting materials are reduced, and the spraying discharge rate is improved.
In the spraying process, under the same condition and within a certain range, the higher the fog pressure is, the finer the mixture particles are, and conversely, the coarser the mixture particles are. The proper spraying pressure is matched to directly influence the morphology and the drying degree of the granules, so that the spraying discharge rate is influenced; in the spraying process, under the same condition and in a certain range, the smaller the aperture of the spray nozzle is, the finer the spray particles are, and vice versa, the coarser the spray particles are, so that the matching of the appropriate aperture of the spray nozzle has certain influence on the dust collection amount of the spray, thereby having influence on the spraying material rate.
Example 1:
a method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
Adding a hard alloy mixture into a wet grinding medium, and grinding into a liquid-solid ratio of a certain proportion, wherein the proportion is as follows: 280 ml/kg.
The stirring speed of the spraying stirring tank is 270 r/min.
The pressure range of the spray nozzle pressure is as follows: 12 bar.
The aperture of the spray nozzle is 1.0 mm.
The wet grinding slurry comprises the following components in parts by weight: 500 kg.
Example 2
A method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
Adding a hard alloy mixture into a wet grinding medium, and grinding into a liquid-solid ratio of a certain proportion, wherein the proportion is as follows: 280 ml/kg.
The stirring speed of the spraying stirring tank is 460 r/min.
The pressure range of the spray nozzle pressure is as follows: 8.5 bar.
The aperture of the spray nozzle is 1.6 mm.
The wet grinding slurry comprises the following components in parts by weight: 800 kg.
Example 3:
a method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
Adding a hard alloy mixture into a wet grinding medium, and grinding into a liquid-solid ratio of a certain proportion, wherein the proportion is as follows: 280 ml/kg.
The stirring speed of the spraying stirring tank is 230 r/min.
The pressure range of the spray nozzle pressure is as follows: 10 bar.
The aperture of the spray nozzle is 1.5 mm.
The wet grinding slurry comprises the following components in parts by weight: 400 kg.
Example 4:
a method for improving the spray discharging rate comprises the steps of adding a hard alloy mixture into a hard alloy wet grinding medium, grinding the hard alloy mixture into wet grinding slurry, and effectively controlling the rotating speed of a spray stirring tank, the pressure of a spray nozzle and the aperture of the spray nozzle to obtain better particle morphology.
Adding a hard alloy mixture into a wet grinding medium, and grinding into a liquid-solid ratio of a certain proportion, wherein the proportion is as follows: 420 ml/kg.
The stirring speed of the spraying stirring tank is 300 revolutions per minute.
The pressure range of the spray nozzle pressure is as follows: 9 bar.
The aperture of the spray nozzle is 1.2 mm.
The wet grinding slurry comprises the following components in parts by weight: 420 kg.
The foregoing detailed description of the embodiments of the present application has been presented, and specific examples have been applied in the present application to explain the principles and implementations of the present application, and the above description of the embodiments is only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (6)
1. A method for improving the spray discharging rate is characterized in that: the hard alloy mixture added into the hard alloy wet grinding medium is ground into wet grinding slurry, and the rotating speed of the spray stirring tank, the pressure of the spray nozzle and the aperture of the spray nozzle are effectively controlled to obtain better particle morphology.
2. The method of claim 1, wherein the method further comprises: adding a hard alloy mixture into a wet grinding medium, and grinding into a liquid-solid ratio of a certain proportion, wherein the proportion is as follows: 280-450 ml/kg.
3. A method of increasing spray discharge according to claim 1 or 2, wherein: the stirring speed of the spraying stirring tank is 270-460 r/min.
4. A method of increasing spray discharge according to claim 3, wherein: the pressure range of the spray nozzle pressure is as follows: 8.5 to 12 bar.
5. The method of claim 4, wherein the method further comprises: the aperture of the spray nozzle is 1.0-1.6 mm.
6. The method of claim 5, wherein the method further comprises: the wet grinding slurry comprises the following components in parts by weight: 500-800 kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548841.6A CN113333760A (en) | 2021-05-20 | 2021-05-20 | Method for improving spraying discharge rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548841.6A CN113333760A (en) | 2021-05-20 | 2021-05-20 | Method for improving spraying discharge rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113333760A true CN113333760A (en) | 2021-09-03 |
Family
ID=77469771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110548841.6A Pending CN113333760A (en) | 2021-05-20 | 2021-05-20 | Method for improving spraying discharge rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113333760A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686644A (en) * | 2005-05-10 | 2005-10-26 | 自贡硬质合金有限责任公司 | Production method of tungsten carbide base ball shaped thermal spray coating powder |
| CN102350503A (en) * | 2011-10-21 | 2012-02-15 | 株洲硬质合金集团有限公司 | Method for producing spherical thermal-spraying powder |
| CN110016601A (en) * | 2019-05-22 | 2019-07-16 | 中国矿业大学 | A kind of nickel chromium triangle-diamond alloy composite powder and its preparation method and application |
| CN111421140A (en) * | 2020-03-06 | 2020-07-17 | 苏州新锐合金工具股份有限公司 | Method for improving fluidity of sprayed powder particles of hard alloy mixture |
-
2021
- 2021-05-20 CN CN202110548841.6A patent/CN113333760A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686644A (en) * | 2005-05-10 | 2005-10-26 | 自贡硬质合金有限责任公司 | Production method of tungsten carbide base ball shaped thermal spray coating powder |
| CN102350503A (en) * | 2011-10-21 | 2012-02-15 | 株洲硬质合金集团有限公司 | Method for producing spherical thermal-spraying powder |
| CN110016601A (en) * | 2019-05-22 | 2019-07-16 | 中国矿业大学 | A kind of nickel chromium triangle-diamond alloy composite powder and its preparation method and application |
| CN111421140A (en) * | 2020-03-06 | 2020-07-17 | 苏州新锐合金工具股份有限公司 | Method for improving fluidity of sprayed powder particles of hard alloy mixture |
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