What type of industrial machine(s) would you suggest for this purpose? The material needs to be ground to a powder like consistency for analysis via XRF.
You can find some clues in the link:
http://www.sun-way.com.tw/Files/DownloadFile/RoHS_flyer.pdf
Retsch & Fritsch have a wide variety of grinding tools, including Planetary ball mills I guess. But for e-waste you might need to Check the MOC of bowl/ball.
As per IEC 62321, you have to consider a "procedure that results in a powder shall produce a material with a known or controlled particle size. In cases where the particles have different chemical, phase or mineralogical compositions, it is critical to reduce their sizes sufficiently to minimize differential absorption effects". Care must be taken about contamination caused by the grinding equipment and any accessories that contact the sample.
If your e-waste includes plastics I would recommend a cryo-mill to avoid melting
You can use ball milling for grinding the e-waste material. I use the same here in my company for e-waste materials.
I think a rotary cutting shredder is essential for primary size reduction. It is also commonly used in plastic recycling industry. But suitable types of these shredders (e.g., with WC cutting tools) for e-wastes in lab-scale operations are also available. To make the most suitable suggestion, one should know the feed and product size planning to be obtained and also size/type of e-waste (a keyboard or a circuit board etc.)
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