How to Grind Granular Potassium Nitrate with a Coffee Grinder ...
If one does not have a ball mill there is another option for grinding coarse potassium nitrate into a free flowing, fine powder. Coffee and spice grinders work well for grinding small batches of individual chemicals. Even though I have a ball mill, there are times when the coffee grinders come in handy for pulverizing smaller batches of chemicals.