Common names such as powder

Common names such as powder, powder, and dry powder are different, but they actually represent the same meaning, with different expression habits in our work.
Due to the diversity of powder characteristics, seemingly simple powder mixing processes often encounter problems of one kind or another. Some problems have complex causes, resulting in the inability to achieve uniform mixing. Ultimately, it will reduce the product quality of downstream products of the powder, and even result in product scrapping. These phenomena have attracted high attention from our team, and we are determined to study powder mixing technology well to provide technical services to our customers. We have compiled this powder mixing technology Q&A encyclopedia for this purpose, hoping to solve some practical problems for you.
In the face of the aforementioned thorny issues, we will analyze and determine the specific reasons that affect the uniformity of mixing from the following aspects.
1、 The three major characteristics of powder are the basis for studying powder mixing
Before finding the cause of uneven powder mixing, it is necessary to understand the three major characteristics of the powder.
1. Specific gravity (density) of powder
Due to the different loose and tight states of the powder, it can be divided into the following three specific gravity:
1) Loose specific gravity
2) Compacted specific gravity
3) Free stacking specific gravity
Free stacking specific gravity refers to the actual stacking specific gravity of materials or the stacking specific gravity of materials in the mixing machine barrel. The free bulk density is between the loose bulk density and the compacted density.
2. Particle size of powder (particle size)
The particle size of the powder is also an important factor affecting powder mixing, and the differences may be significant during mixing work, such as salt particles of about 0.6mm and pigment particles of about 0.001mm. The greater the differentiation, the more difficult it is to mix evenly.
3. Flowability of powder
The flowability of powder is also an important characteristic, as good or bad flowability can affect the result of uniform mixing.
The above three major characteristics are the foundation of our research on powder mixing technology. Most of the problems encountered in mixing are caused by the simultaneous occurrence of one or more characteristics. The method of analyzing problems is based on these three major powder characteristics.