In recent years, the use of round prehomogenized yard has increasingly been promoted.The round preblending of the yard is the yard which has been used more, it has the following characteristics: (1) raw materials is sent to the yard Centre by conveyor (a) of the mineral processing equipment, 360 degree rotation around the center boom belt conveyor stacker. The conveyor has a long history, the ancient Chinese drum car and carrying water overturned, is the prototype of modern bucket elevator and scraper conveyor. Material conveyor handling machinery, continuous delivery of materials in certain lines, also known as continuous conveyor. The conveyor can be horizontal, inclined conveyor, and also space can be composed of the transfer line, the transfer is typically fixed line. Conveyor transport capacity, long distance, which can also be completed at the same time the number of process operations in the transportation process, so a wide range of application.(2) bridge scraper reclaimer reclaimer complete this work, One end of the bridge joins yard center column, on the other end of the erection stockpile peripheral circular orbit with 360 degree maneuver.

Remove the raw materials by the scraper to the yard at the bottom of the discharge port, the discharge belt conveyor by a trench away. (3) Round yard generally use 3 120 degree operating method, that is 1/3 volume of the ongoing round yard stockyard operations; 1/3 volume of the ongoing reclaiming operation; 1/3 of the heap as to reserve material, There are actually 2/3 of the stockpile as a reclaimer stockpile (but not impact crusher). Therefore, the capacity of 2/3 of the circular yard effective capacity. Generally the same reserves the round yard can be 30% smaller footprint than rectangular yard. (4) changes in the the circular yard divided into three (3 1200) method of operation, the eradication of the material in the heap of the transition zone and the end of the cone, round yard windrow formation of a ring never disconnected. The round yard continuous operates to the plan view of FIG.

(5) vertical and tilt layer combined stacker herringbone. (6) pre-homogenizing effect of continuous operation method in the the round yard of application, further improve and expand the effective volume of the utilization of the yard, to further promote the application of the round yard. Other yards applications. in the cement industry is small, for example: Lying on library-style yard, built crane library type, with the bridge Paternosters viscous materials reclaimer; yard with a slit-shaped warehouse at the bottom of the impeller reclaimer reclaimer, and so on.