CN2103375U - Incline multi-airstream jet nozzle step fine grinding mill - Google Patents
Incline multi-airstream jet nozzle step fine grinding mill Download PDFInfo
- Publication number
- CN2103375U CN2103375U CN 91200771 CN91200771U CN2103375U CN 2103375 U CN2103375 U CN 2103375U CN 91200771 CN91200771 CN 91200771 CN 91200771 U CN91200771 U CN 91200771U CN 2103375 U CN2103375 U CN 2103375U
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- airstream
- ground
- flow
- pulverizing chamber
- air
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Abstract
The utility model discloses an inclined multiple nozzle airstream grading fine grinding mill which is characterized in that a plurality of inclined tangent directional nozzles are installed on the circumference of a cylinder-shaped grinding room with equal distance. High-speed airstream can be jetted to make materiel form a high-concentration materiel flow in the circumference of jet flow jet position under a centrifugal effect in the cylinder-shaped grinding room. Mighty impact, collision and friction can be produced continuously. The material which is difficult to be ground like alumina powder, can be ground into superfine powder and granularity is 0, 5-1.0 micron. The center of the grinding room is provided with a lifting assistant wind pipe for adjusting the fineness and the yield of ground material.
Description
The utility model mill belongs to reducing mechanism, specifically, is the improvement of spraying micropowder grinding for air-flow.
Existing air-flow jet mill (Majac) (see figure 1).It is to be provided with the device that some two strands of jets spray relatively in rectangle pulverizing chamber (1), and the high-pressure spray that produces by means of compressed air (2) pulverizes solid material by nozzle (3) to the solid material generation impact rubbing action that enters from loading hopper (4).Powder is after crushed crossed conduit (5) with air communication and is entered cyclone separator (6) and carry out sorting.Qualified particle imports dust collecting system through fine outlet (7).Corase particles enters batch mixing chamber (9) through cyclone separator bottom conduit (8), mixes with compressed air at this, sprays into pulverizing chamber again through nozzle and proceeds comminution process.
Air-flow jet mill (Majac) as grinding the defective that industrial ceramics raw material alpha-aluminium oxide or other difficult-to-grind materials mainly exist is: nozzle is easy to wear, often needs to change; The process that grinds easily produces the irony severe contamination, influences the quality of product.And product can not be divided into some grades simultaneously, supply the selection of the ceramic of different technologies requirement.
The purpose of this utility model is to overcome the easy to wear and severe contamination product of above-mentioned Majac jet mill nozzle and can not be divided into shortcoming such as some grades simultaneously.Of the present utility model reinforced without nozzle but directly enter pulverizing chamber, thus nozzle wear and polluted product can be avoided.Be divided into some grades by connecting gravity settling chamber, in addition, but can regulate granularity and output owing to be provided with the auxiliary airduct of oscilaltion in the pulverizing chamber.
The utility model air-flow sprays the little mill of classification and forms (see figure 2) by pulverizing chamber, gravity settling chamber and bagroom three parts.Pulverizing chamber is the nozzle (11) of equidistant several oblique tangential directions of installation on the barrel of garden tubular pulverizing chamber (10), enter the material of pulverizing chamber through feed mouth (12), under the centrifugal action of garden shape pulverizing chamber, form high concentration material stream in jet ejection place, and produce continuous high-strength impact, collision, fricting movement and pulverize.Material after the pulverizing enters some grades of gravity settling chambers (13) with air-flow.Because the effect of inertia of particle, corase particles can not flow with air-flow again, and separates from air-flow, and gravity settling chambers at different levels can obtain the product of size fractionated.Air is separated from bagroom (14), and the thinnest product obtains in the tipping bucket of the bottom of dust chamber.The outer air compressor that connects of high speed gas (15) stream is supplied with.
The feature (see figure 3) of the utility model pulverizing chamber structure is that the angle of each nozzle (11) and cylinder normal is 20～40 °, and nozzle adopts stainless steel or other antifriction metal (AFM) to make, and also the useful ceramics material is made.The internal diameter of nozzle is 0.5～5mm, and the length of nozzle is 10～100mm, and the quantity of nozzle can be decided according to the pulverizing chamber diameter, is generally 10～54.
But it is also to be provided with the auxiliary airduct (16) that oscilaltion is regulated in pulverizing chamber that the utility model air-flow sprays another feature of classification micropowder grinding, in order to regulate the granularity and the output of comminuting matter.Auxiliary airduct downward modulation to increasing air quantity in the pulverizing chamber, can will blow afloat than coarse granule, takes away the corresponding increase of output with air-flow.Last timing only will be taken away than fine grained.Fine size in the product, and the corresponding reduction of output.
The inwall of pulverizing chamber and expansion chamber can pollute requirement according to the product different preventing, adopts unlike material, thereby guarantees product quality.
It is simple in structure that the utility model air-flow sprays the classification micropowder grinding, and cost is low, and is easy to operate, easy care, energy consumption is little, now can apply to the industrial ceramics industry and grind high-purity alpha-aluminium oxide micro mist, also is applicable to the making of various micro mists such as pulverizing graphite, precipitated calcium carbonate, barite simultaneously.
The utility model air-flow sprays the classification micropowder grinding, and one tame alumina powder processing factory uses through the Zhuhai Special Economic Zone, and reflect following advantage: 1, complete machine structure is simple, and materials are economized, and cost is low, and the equipment gross investment is 1/3 of a corundum ball mill; 2, can produce continuously, good seal performance, fly upward the loss little, output reaches 20 kilograms/hour; 3, abrasive material and classification process not with the irony friction, finished product is not polluted by irony; 4, energy consumption is low, per kilogram product consumption kilowatt-hour.Per tour two people operation, therefore, directly processing charges is very low.
Embodiment 1: adopt the utility model air-flow to spray the classification micropowder grinding and grind alumina powder
Experimental condition: compressed air pressure: 0.5～0.7MPa
Feeding quantity: 20 kilograms/hour
Drop into material: particle mean size is 64.2 μ m
The output micro mist: particle mean size is 1.65 μ m
0.0～0.5μm26.2％；0.5～1.0μm14.7％；
1.0～2.0μm14％；＞15μm2.7％
Embodiment 2: adopt the utility model air-flow to spray the classification micropowder grinding and grind the alpha-type aluminum oxide micro mist.
Experimental condition: the same
Drop into material: alpha-aluminium oxide content 98%, true specific gravity 3.95, particle mean size 31.4 μ m
Output micro mist: particle mean size 1.7 μ m
0.0～0.5μm12.8％；0.5～1.0μm25.6％；1.0～2.0μm14.9％；＞10μm1.5％
Claims (2)
1, a kind of oblique multiinjector air-flow sprays the classification micropowder grinding, it is characterized in that installing in a cylindrical shape pulverizing chamber 12～36 aperture Φ
In1.2～2.0mm, length is that the nozzle of 25～50mm and the angle of pulverizing chamber cylinder normal are 25 °～35 °.
2,, it is characterized in that being equipped with an adjustable auxiliary airduct at the pulverizing chamber center by the described micropowder grinding of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200771 CN2103375U (en) | 1991-01-18 | 1991-01-18 | Incline multi-airstream jet nozzle step fine grinding mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200771 CN2103375U (en) | 1991-01-18 | 1991-01-18 | Incline multi-airstream jet nozzle step fine grinding mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2103375U true CN2103375U (en) | 1992-05-06 |
Family
ID=4911649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91200771 Granted CN2103375U (en) | 1991-01-18 | 1991-01-18 | Incline multi-airstream jet nozzle step fine grinding mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2103375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1143735C (en) * | 2001-06-01 | 2004-03-31 | 圣戈本陶瓷及塑料股份有限公司 | Improved grinding medium |
-
1991
- 1991-01-18 CN CN 91200771 patent/CN2103375U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1143735C (en) * | 2001-06-01 | 2004-03-31 | 圣戈本陶瓷及塑料股份有限公司 | Improved grinding medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |