Raymond mill, also known as hanging roll disc mill, is a pulverizer imported from abroad. 1. Who invented Raymond mill? In 1906, C.V. grueber established curt von grueber machinery manufacturing plant in the southern suburb of Berlin. Using his patent obtained in the United States, he produced the first maxecon mill, which was used in the moabit power station of bewag in Berlin as coal grinding equipment, with grinding energy up to 5t / h. nearly 600 units were sold in a few years and applied to