Ordinary wollastonite: wollastonite is a new type of sintered flux material, which can be used in all slag-based sintered fluxes. Wollastonite is used for electrode coating, which can accelerate the melting rate, has the advantages of energy saving, anti-porosity, etc., increases the strength of the weld, promotes the smooth surface of the weld, improves the excessive droplet, and accelerates the melting rate of the coating. Wollastonite with low impurity content and good quality is also suitable for special welding rods and submerged arc fluxes.