Novel feeding device includes hollow hopper, and the upper portion of hopper is provided with feed inlet, lower part and is provided with the discharge gate, be located in the hopper the below of feed inlet is provided with the filter layer that is arranged in filtering raw materials solid caking, be provided with the through -hole of a plurality of interval arrangements on the filter layer, be located in the hopper the below of filter layer is provided with the magnetic element who is arranged in adsorbing raw materials metallic impurity, magnetic element is located the top of discharge gate. The utility model discloses can prevent that solid starting material from agglomerating to the influence of follow -up technology, the life -span of having improved equipment, the absorption that can go on metallic impurity has simultaneously improved the quality of raw materials.