Method for growing high-purity iron single crystal by using zone melting method

The invention discloses a method for growing a high-purity iron single crystal by using a zone melting method, and belongs to the technical field of crystal material manufacturing. The method for preparing the high-purity iron single crystal comprises the following steps: placing an iron bar in a vertical zone smelting furnace and clamping; the current of the coil is controlled, so that the iron bar forms a melt for zone-melting purification, and impurities are mainly concentrated at the two ends of the iron bar; controlling the current of the coil, and heating the iron bar material part with higher purity to form a melt; keeping the lower shaft immovable, and controlling the upper shaft to be pulled upwards to form a thin neck; then controlling the upper shaft and the lower shaft to move synchronously, and growing the iron single crystal; and after the growth is finished, keeping the current of the coil for standing, then reducing the current of the coil to 40A, turning off the induction power supply, coolin