Crushing apparatus

A crushing apparatus for crushing a supplied material into the form of a fine powder and for guiding the fine powder to the outside thereof, said crushing apparatus comprising:

• a crushing tank having a crushing chamber opened upward, having an agitator provided therein to crush the material supplied through a material supply device into the fine powder and having a first gas supply device for sending the fine powder upward;
• a classifier provided adjacently to the upper portion of said crushing tank and formed into substantially a cylindrical shape containing a classifying chamber, said classifier having:
• a gas emitting portion for emitting a second gas to said classifying chamber;
• a vane for guiding the second gas from the gas emitting portion in the tangential direction thereof;
• and a cylindrical communicating portion for communicating said classifying chamber with said crushing chamber of said crushing tank;
• a guide device disposed at the interior of the communicating portion of said classifier for guiding the fine powder formed within said crushing chamber to the classifying chamber of said classifier and forming a ring-like circulation passage between said guide device and the inner surface of the communicating portion of said classifier, said guide device having:
• a dispersing tube having a cavity formed therein and gradually increased in diameter toward said classifying chamber;
• an introduction port provided at an opening on the crushing chamber side of the dispersing tube;
• and a gas reservoir for supplying a high-pressure gas to the introduction port;
• and
• a fine powder extracting tube attached movable in an up and down direction with respect to said classifier by means of a linking member in the state where an opening thereof is positioned at the center portion of the classifying chamber, said fine powder extracting tube for directing to the outside the fine powder classified at the classifying chamber of said classifier.

A crushing apparatus for crushing a supplied material into the form of a fine powder and for guiding the fine powder to the outside thereof, said crushing apparatus comprising:

• a crushing tank having a crushing chamber opened upward, having an agitator provided therein to crush the material supplied through a material supply device into the fine powder and having a first gas supply device for sending the fine powder upward;
• a classifier provided adjacently to the upper portion of said crushing tank and formed into substantially a cylindrical shape containing a classifying chamber, said classifier having:
• a gas emitting portion for emitting a second gas to said classifying chamber;
• a vane for guiding the second gas from the gas emitting portion in the tangential direction thereof;
• and a cylindrical communicating portion for communicating said classifying chamber with said crushing chamber of said crushing tank;
• a guide device disposed at the interior of the communicating portion of said classifier for guiding the fine powder formed within said crushing chamber to the classifying chamber of said classifier and forming a ring-like circulation passage between said guide device and the inner surface of the communicating portion of said classifier, said guide device having:
• a dispersing tube having a cavity formed therein and gradually increased in diameter toward said classifying chamber;
• an introduction port provided at an opening on the crushing chamber side of the dispersing tube;
• and a gas reservoir for supplying a high-pressure gas to the introduction port;
• a fine powder extracting tube attached movable in an up and down direction with respect to said classifier by means of a linking member in the state where an opening thereof is positioned at the center portion of the classifying chamber, said fine powder extracting tube for guiding to the outside the fine powder classified at the classifying chamber of said classifier;
• a suction nozzle provided on said crushing tank in the state where an upper opening of said suction nozzle is separated by a small distance from the introduction port of said guide device, said suction nozzle increased in diameter toward the lower end thereof;
• and
• a core provided at the interior of the cavity of the dispersing tube of said guide device in a manner spaced therefrom, said core forming a ring-like communication passage gradually increased in diameter toward said classifying chamber between the inner peripheral surface of said dispersing tube and said core.