one that uses steel balls as grinding media, while a pebble mill is one that uses flint pebbles , Fundamentally, milling is a process for reducing the particle size of solids , production mills for either wet or dry size reduction of alumina, steatites.
A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing , Ball mills are also used in pyrotechnics and the manufacture of black powder, but cannot be used in the preparation , and grinding medium is low; it is suitable for both batch and continuous operation, similarly it is suitable for open.