38 / 390
Product shape
To achieve highest filling grades of the crucibles, facilitate packaging and
transportation, a roundish and flowable product could improve these processes.
Metal impurities
To avoid metal impurities is a key goal of any Si-handling or crushing process.
Results have been shown in chapter 2.
A process which reduces handling steps and is fully automated can provide more
security on the appearing impurities.
An important factor which is not fully considered by the industry yet is the
surface/volume ratio, to minimize the natural oxygen layer whereas with the roundish
particles of the HV-process less surface is generated compared to standard crushing
methods.
Figure 9:
L: HV-crushed product
R: Jaw crusher product
30