Advantages of jet mill used in metal ore crushing processing
In order to develop deep processing and products of non-metallic minerals, in recent years, many countries have vigorously researched micro-pulverization and ultra-fine pulverization technology and equipment. As a jet mill as a superfine grinding equipment, its products show excellent performance in terms of fineness, particle size distribution, and purity.
The jet mill uses high-pressure air flow (compressed air or superheated steam) to make materials subject to impact (collision), friction and shearing to achieve the purpose of crushing. It is a widely used and highly efficient ultra-fine crushing equipment. The jet mill can be used in series with a multi-stage classifier to produce products with multiple particle sizes at one time. The crushing process relies on the collision between the materials themselves, which is different from the mechanical crushing which relies on the impact of blades or hammers on the materials, so the equipment is wear-resistant and the product purity is high. The equipment is easy to disassemble and clean, smooth and without dead corners. The control system adopts program control, which is easy to operate.
The specific operation mode of the jet mill is that compressed air is filtered and dried, and then sprayed into the grinding chamber at a 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 Under the action of the fan suction force, it moves with the upward airflow to the classification area. Under the action of the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. Coarse particles descend to the crushing zone to continue crushing.
In addition to the fine particle size of the product, the jet mill products also have the characteristics of narrow particle size distribution, smooth particle surface, complete shape, high purity, high activity, and good dispersibility. Therefore, the jet mill, as an advanced ultrafine grinding equipment, is widely used in the ultrafine grinding of non-metallic minerals and chemical raw materials.
The jet mill is suitable for dry pulverization of various materials with Mohs hardness below 9 and is especially suitable for the pulverization of materials with high hardness, high purity and high added value.