Mainly deals in silicate-boric孕育剂 and silicon particle孕育剂. Particle size: 0.2-0.7mm for in-line孕育; 1-3mm/3-8mm for in-package孕育, ensuring the孕育 time is controlled at over 70% of the iron-making time; 8-25mm for in-furnace孕育. Primarily used for the孕育 of spheroidal cast iron and gray cast iron melts. Enhances the machinability of castings.