The invention relates to the technical field of
powder preparation, and particularly discloses a preparation process method for
grinding and screening
powder, which comprises the following steps: removing impurities from blocky raw materials through a vibration screening device, and then removing
metal foreign matters by using a
magnetic separation device. Then, a
grinding step is carried out, the blocky raw materials are ground through multi-stage
grinding equipment, primary
powder is formed, and the grinding mesh number is increased step by step; and then, in the
dynamic screening stage, coarse powder, medium coarse powder and
fine powder are separated from the primary powder through a powder selecting device, the coarse powder is collected through a gravity
settling method, and the medium coarse powder is separated through
centrifugal force and
airflow. In the closed-loop
recovery link, coarse particles are sent back to grinding equipment for treatment, medium coarse powder is sent to a medium coarse powder collecting area, and
fine powder is conveyed to a
fine powder collecting device. And finally, cleaning the fine powder by using a pulse bag-type
dust collector, and temporarily storing the finished product powder into a finished product collecting bin. According to the process, efficient screening, grinding and recycling of the raw materials are achieved, and the purity and high quality of the powder are ensured.