The function of the lime powder selector is to separate and collect qualified products from unqualified coarse powder according to the fineness or specific surface area requirements of the coarse and fine powder mixture discharged from the mill, and send the unqualified coarse powder back to the ball mill for regrinding. The overall working principle is to use gas powder mixture to form gas-Solid two-phase flow causes the dusty airflow to rotate, resulting in a large inertial centrifugal force for coarse particles and a large radial velocity for separation, thus achieving the separation of coarse and fine powders. At the same time, corresponding methods are used to collect coarse and fine powders separately.
The function of the lime powder selector is to separate and collect qualified products from unqualified coarse powder according to the fineness or specific surface area requirements of the coarse and fine powder mixture discharged from the mill, and send the unqualified coarse powder back to the ball mill for regrinding. The overall working principle is to form a gas-solid two-phase flow by mixing gas and powder, causing the dusty airflow to rotate, and the coarse powder particles to obtain a large inertial centrifugal force, as well as a large radial separation velocity, thereby achieving the separation of coarse and fine powders. At the same time, corresponding methods are used to collect coarse and fine powders separately.
The working principle of the lime powder selector is mainly achieved through three functions, namely: material spreading, grading, and finished product collection. But the specific working process of implementing these three functions is different for different types of powder selection machines.
1、 A centrifugal powder selector uses lower material scattering and air and powder circulation inside the machine to achieve separation and collection of coarse and fine powders. Its characteristic is that due to the circulation of air and powder inside the machine, this type of powder selector is called an internal circulation operation.
2、 The cyclone type powder selection machine also uses lower material scattering, but the air enters through the lower tangential inlet. During the process of air entering and rising, it passes through the material scattering curtain, and then passes through the rotating fan blades or conical cage to achieve classification. The graded airflow carries the finished fine powder out of the powder selection chamber, and the dusty airflow discharged from the powder selection chamber is then sent into the cyclone tube for powder separation and collection of the finished product.
Its characteristic is that the clean airflow coming out of the cyclone enters the fan for circulation, so this type of powder selector is called an external circulation operation.
3、 The powder selection machine represented by O-Sepa adopts upper scattering, which does not rely on the scattering disk to generate inertial centrifugal force on the powder to form a material curtain. Instead, the material curtain is formed by the free fall of the material by its own weight after being distributed on the scattering disk. The plane enters the air tangentially, and the cylindrical vortex is formed by the cylindrical cage to achieve classification. The finished fine powder is discharged into the powder selection chamber with the airflowdust collectorRealize fine powder collection.
Its characteristics are: due to the use of cylindrical rotating cages in this type of powder selector, a relatively uniform vortex field can be formed, resulting in good classification effect and powder selection efficiency. At the same time, the airflow from the dust collector is directly discharged through the fan without circulating work.
