Research extraction of powder in special mills and use of magnetic method of their cleaning

Simplified scheme for obtaining nanostructures using a mill.

1 - cylinder,

2 - steel balls,

3 - pulverized particle.

Methods and objects of research.

A simplified diagram of the mill is shown in Figure 1. In terms of the structure of the mill, it consists of a cylinder (1) and steel (2) balls rotating around its axis. Initially, the raw material is ground to a size of 2 mm (3) and ground in a mill. Ethyl alcohol is used to ensure the quality of the powdering process. This process can be compared to making flour from wheat using a mill. It is known that in the production of flour, wheat grains are initially moistened to a certain extent. This, firstly, makes it easier to grind wheat, and secondly, increases its viscosity. A similar physical process occurs during the powdering of crystal particles.

In the process of turning wheat into flour, the husk on the surface is also pulverized. This leads to its bankruptcy. Usually they are called flour bran. Special cleaning is carried out to separate it from the bran. A similar situation occurs during the grinding of crystals. Therefore, one of the main disadvantages of powder technology is the contamination of the powder from the raw material to the preparation of the powder. Typically, powder preparation is done mechanically. During the preparation or processing of powders, various metallic inclusions from the external environment enter the raw material in the form of powder or powder, leading to contamination of the final product. In order to solve these problems, powder cleanliness control methods are used. Let's look at a magnetic method of dust removal below.