Method for preparing square silicon core by using crushed material

The invention discloses a method for preparing a square silicon core by using crushed materials, and relates to the technical field of polycrystalline silicon, and the method comprises the following steps: S1, sorting raw materials according to classes, the raw materials comprising crushed materials, powder materials, leftover materials and top and tail materials; s2, the sorted leftover materials and the sorted tail and top materials are subjected to acid pickling through mixed acid, and then water washing is conducted through pure water after acid pickling; s3, the sorted crushed materials and powder materials and the washed edge leather materials and the washed head and tail materials are prepared according to the weight proportion; s4, thermal field installation is checked, after checking confirmation, the crucible is put into the furnace, the prepared raw materials are put into the crucible in the furnace, and after charging is completed, a furnace cover is rotated to be closed; s5, the raw materials loa