Udara termampat atau wap panas lampau atau suasana lengai lain memasuki paip pengedaran gas dari port suntikan gas suapan. Di bawah tindakan tekanannya sendiri, gas melalui beberapa muncung yang disusun secara tangen di sekeliling gelang tempat duduk untuk menghasilkan jet berkelajuan tinggi dan berlanggar dengan bahan yang memasuki ruang pengisaran. Penyuntik suapan yang terdiri daripada corong, muncung suapan dan tiub Venturi digunakan sebagai peranti suapan. Bahan dalam corong dikeluarkan ke tiub Venturi oleh aliran jet dari muncung suapan. Dalam tiub Venturi, bahan dan aliran udara bercampur dan bertekanan dan memasuki ruang penghancuran. Bahan yang dihancurkan dibawa ke tiub kumpulan tengah melalui aliran udara dan melalui Paip tindanan pergi secara paksi ke dalam paip ekzos tengah ke atas atau ke bawah ke dalam unit pengumpulan.
Gas termampat digunakan untuk melepasi ejector penyuap untuk membawa bahan mentah yang dikisar ke dalam ruang pengisaran, dan didorong oleh aliran udara berkelajuan tinggi dari pelbagai muncung, ia disembur pada dinding pengisaran secara tangen untuk mencapai kesan pengisaran geseran. . Dengan melaraskan kedalaman membujur ruang pengisaran, melaraskan tekanan pengisaran atau kelajuan penyusuan, kehalusan pengisaran boleh dikawal. Berbanding dengan Spiral Jet Mill, kebolehkawalan kehalusan penghancuran adalah kurang.
| Model | Saiz Pemakanan (mm) | Saiz zarah (D97:µm) | Kapasiti Pengeluaran (kg/j) | Penggunaan udara (m³/min) | Tekanan udara (Mpa) | Kuasa terpasang (kW) |
|---|---|---|---|---|---|---|
| MQP01 | < 2 | 8~150 | - | 1 | 0.7-0.85 | 7.5 |
Nota: Kapasiti pengeluaran berkait rapat dengan saiz zarah, graviti tentu, kekerasan, kelembapan dan penunjuk lain bahan mentah. Di atas hanya untuk rujukan pemilihan.
By working with a tolling partner’s technical team, you will gain efficiency. They will help choose the best mill type. They will also pick the right speed and feed rate. They will also cover any special project needs.
The team brings focused insights and extensive experience to the table. However, you should also expect to provide safety data sheets and answer a few questions, such as:
A jet mill is a type of ultrafine grinding equipment. It is a machine that uses a lot of energy. Therefore, the feed particle size of the air flow mill should be as fine as possible. It is recommended that the feed particle size be less than 80 mesh. Under normal circumstances, the feed particle size needs to be less than 1 mm.
Jet milling usually makes particles that are 1 to 10 microns in size. This is referred to as micronization.
Some product formulations require particles as small as 200 nanometers. The material's properties determine how small these sizes can be. You can make them smaller by increasing the mill's power. Additionally, by increasing the time the material spends in the milling chamber.
Some products require particles larger than 10 microns. This can be achieved by reducing the power to the mill or increasing the feed rate to the equipment.
In both circular and fluidized bed mills, jets of air or steam are made by gas. The gas is compressed to a gauge pressure of 50 to 120 psig. The most common gas used is commercially compressed air.
Superheated steam (392–980°F) is compressed to 100–220 psig. It can also be used on raw feed materials that are not heat-sensitive. Some of the other gases used include:
Nitrogen, which can protect materials from oxidation and/or fire
Argon, another inert option, though more expensive than nitrogen
Helium, used to achieve higher-velocity impact between particles
A great deal of energy is needed to create enough momentum to cause particles to break on impact. The compressor and nozzles turn high air pressure into energy. They do this within the mill. Large particles recirculate, and multiple high-velocity collisions progressively reduce their mass.
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