Magnesium-ferrosilicon alloy is a gray-black solid, which is formed by ferrosilicon as raw material, and the ratio of calcium, magnesium and rare earth is adjusted to the optimal range to make it react smoothly. The casting thickness of each brand of rare earth magnesium ferrosilicon alloy does not exceed 100mm; the standard particle size of rare earth magnesium ferrosilicon alloy is 5~25mm and 5~30mm. According to different purposes, customers can specify special granularity, such as: 5~15mm, 3~25mm, 8~40mm, 25~50mm, etc.

Low-magnesium nodulizers are mostly used for smelting in intermediate frequency furnaces and nodulizing treatment of low-sulfur molten iron. It has the advantages of gentle spheroidization reaction and easy full absorption of spheroidized elements. 

Medium magnesium which contains 6% and 7% magnesium are mostly used in cupola furnace, electric furnace duplex smelting, or intermediate frequency furnace smelting pearlite cast ductile iron castings. According to the wall thickness of the casting and the sulfur content of the original molten iron, determine the appropriate amount of nodulizer added, which has a wide range of applications and a wide range of nodulizer treatment processes. 

High-magnesium series nodulizers are suitable for cupola smelting, molten iron with a sulfur content of 0.06%-0.09%, and the addition amount is between 1.6%-2.0%. Low-aluminum nodulizers are used in castings that are prone to subcutaneous porosity defects, and castings that require aluminum content in molten iron.