A technical guide on sample grinding, including grinding principles, grinding tools, and grinding aids.
This document explains the principles and processes of size reduction and sample homogenization in laboratories. It covers sample preparation, grinding tools, and material-specific techniques. RETSCH offers a range of mills and crushers for different materials and applications, including jaw crushers, rotor mills, and ball mills. The guide emphasizes the importance of representative sampling and proper preparation to ensure accurate analytical results.
The document also includes practical tips for ball milling, material-specific preparation methods (like drying, metal separation, and embrittlement), and a hardness table for material selection. It is intended for laboratory professionals who need to prepare samples for analysis or further processing.
Most analytical methods require a sample fineness in the size range from 20 µm to 2 mm.
At a temperature of -196 °C, even soft rubber becomes hard and brittle enough to be ground.
For many products, the drying time using the fluidized bed method is as little as 5 to 20 minutes.