The invention relates to a continuous mixing silo and a method of operating it for the mixing of fine-grained material. The silo has a base provided with a plurality of zones which are supplied with aerating air in chronological sequence. Individual zones of the base are supplied with additional air...http://www.google.com/patents/US4472062?utm_source=gb-gplus-sharePatent US4472062 - Continuous mixing silo and method of operation
