DIRECTIONAL SOLIDIFICATION METHOD FOR INCESSANTLY PRODUCING THE POLYSILICON INGOT AND THE RELATIVE INGOT CASTING APPARATUS

摘要

The present invention pertains to a method for incessantly producingpolysilicon ingots, especially fabricated of an equality polycrystallinematerial. It contains ametallurgical method for continuously producing large amount of polysiliconingot made bymetal silicon, further comprising the steps of aligning empty graphite moldson furnace cars;preheating the molds in the preheating area; pouring the liquidized siliconinto the preheatedmolds; transporting the molds filled with liquidized silicon from the high-temperature area,thence to a medium-temperature area, and then to a low-temperature area forsolidifying theliquidized silicon into crystallized silicon; cooling the crystallized siliconuntil reaching theroom temperature by the assistance of a shroud in a rotary conveyer track,thus generatingan integral polysilicon ingot. The apparatus comprises a body, a chamber, atrack, cars, afront and rear auxiliary cars, a rotary conveyer track, a propulsionapparatus, and anadjusting system.