Ultrafine grinding particles are required for many purposes, right? For the fulfillment of those purposes, a highly efficient pin mill pulverizer has been designed that is used for grinding the solid materials into macroscopic materials. It’s a simple and inexpensive approach towards grinding, sizing, and de-agglomerating.
There’s no need for screens, hammers, and knives for the fulfillment of the overall process. Instead, it relies on material impacting hundreds of pins thousands of times as it starts traveling from the center to the periphery of the milling chamber. The chamber has an outer stationary disc containing circular rows of the pin that alternate with concentric rows of the pin on the inner rotating disc.
Different range of particles is needed at different times so the operator of this machine only needs to adjust the speed at which the inner disc rotates from a hundred to thousand RMP depending on mill diameter. This extreme flexibility enables the machine to grind friable materials from coarse particles to the powdery form. It’s compact and economical with high-capacity and maintenance-free.
The particle size produced by the machine is determined by the following factors
– The tip speed of the rotor.
– Physical properties of the material.
– Distribution of the pins.
– The feed rate.
– Gas flow rate
The overall process can be optimized by either increasing the rotor speed tip to the maximum level or minimizing both the feed and airflow rate.
Benefits of pin mill
– It produces smaller particle sizes at reasonable energy consumption.
– The heat removal process has improved by using cryogenic conditions.
– It occupies a little floor space
– Can be used in moist, dry, and slurry materials.
Drawbacks of pin mill
– Wear and tear issues due to friction.
– It’s difficult to clean the machine after use
– It tends to form a wide particle size distribution because of the narrow range of size reduction.
– Heat generation issues due to friction
– Low capacity and mill fouling
