How to solve the problem of excessive dust when the jet mill is working

The jet mill, cyclone separator, dust collector, and induced draft fan constitute a complete pulverization system. After the compressed air is filtered and dried, it is sprayed into the crushing chamber at high speed through the Laval nozzle. At the intersection of multiple high-pressure airflows, the materials are repeatedly collided, rubbed, and sheared to be crushed. The crushed materials rise with the suction of the fan. The air flow moves to the classification zone, and the coarse and fine materials are separated under the strong centrifugal force generated by the high-speed rotating classification turbine. The fine particles that meet the particle size requirements enter the cyclone separator and dust collector through the classification wheel for collection, and the coarse particles descend to the grinding zone to continue grinding .

Sometimes the difference in operation mode and settings will make the crusher’s crushing effect poor. Whether it is to increase the speed of the extension or set the parameters, it will not achieve good results. So what to do in this situation, let me tell you about it below. Ways to improve the crushing effect.

To increase the feed rate, the principle of airflow pulverization mainly relies on the high-speed airflow to cause strong collisions between the material and the material, and the material and the inner wall to achieve the pulverization effect. If the feed is too little, the purpose of frequent and strong collisions cannot be achieved, so that the strength cannot be lowered. In addition, if the fan damper is too large, the internal negative pressure will be too large and the collision will be reduced; on the contrary, the positive pressure is not good.

The jet mill is used to crush materials, so the crushed materials and tailings must be discharged in time. When the crusher discharges these crushed materials, there will be dust. So how to solve if the dust is too large?

1. Install the dust collector: Generally, this type of dust collector can be used with a grinder. It collects the dust in the collection bag, and the dust is filtered and discharged from the dust box through the cloth bag;
2. The cloth bag is dustproof: the cloth bag is tightly tied to the powder outlet of the machine to prevent air leakage and powder leakage. Attention should be paid during operation: the powder outlet should be blocked when parking, and the dust should be cleaned up in time.
3. Dust removal by wood shower or pool: Mainly use a ventilator to vacuum to the outside of the grinding room, and then use a spray to vacuum, or use a pool to vacuum, etc.

The above three dust removal methods can achieve good dust removal effects and can solve the problem of excessive dust. Generally, these dust removal devices are installed before work to prevent excessive dust.