Raymond® Imp™ Mill system with flash calcining
In addition to free moisture, some materials, such as gypsum, contain chemically bound water, which must be removed to change the physical characteristics of the material. This process, known as calcining, can be easily accomplished with a Raymond® Imp™ Mill system.
Essentially similar to flash drying, the Raymond® Imp™ Mill system with flash calcining is provided with several special features which make it suitable for the higher temperatures involved. Our experience in the processing of gypsum, by-product gypsum and waste wallboard provides our customers with a single source of equipment supply for processing gypsum and the manufacturing of gypsum wallboard, stucco.
Raymond® Imp™ Mill system with flash drying
Many materials contain a certain amount of free water in the form of moisture that must be removed to increase the value of the pulverized material and to allow it to be handled more efficiently.
The Raymond® Imp™ Mill system with flash drying requires a source of heated air that can be in the form of a fired air heater or waste heat source. The heated air is used to flash dry the material as it is pulverized and swept from the mill. Depending on the initial moisture content of the feed, a portion of the dried product may be combined with the moist feed material in a double paddle mixer. This “conditioned” feed is easier to handle and is more efficiently dried and pulverized. A vent is provided to remove a portion of the moist air, and the balance of the warm air is returned to the system, where it is mixed with fresh, warm air coming from the air heater
