The invention discloses a closed type
production line device and a method for crushing aluminum
oxide crusted blocks. In the invention, materials are crushed primarily on a
production line, so that the feeding particle size is less than or equal to 300 millimeters, the discharging particle size is less than or equal to 1
millimeter, a standard discharging particle size which can only be reached by performing secondary and
tertiary crushing is reached, the production efficiency is increased, the consumption is lowered, and aluminum
oxide crusted blocks are recycled in time; and automatic running of the entire
production line is controlled through an
electric control system, so that dust purification in the crushing process is realized simultaneously. The closed type production line device consists of a mechanical part and an
electric control part, wherein the mechanical part consists of a
crusher, an iron remover, a conveyer, a
raw material cabin, a
gate valve, a vibratory feeder, a pulverizing mill, an air locking
discharge valve, a coarse
powder separator, a
cyclone dust collector, a circular fan, a bag type
dust collector, an exhaust fan, iron removers and a finished product cabin. The method for crushing the aluminum
oxide crusted blocks comprises feeding, pulverizing, material separating, air replenishing, material and dust collecting and material storing in sequence. The device and the method are safe, environmentally-friendly and efficient, and energy is saved.