At present, most of the slabs are formed by continuous casting, and the surface of the slab will form an oxide layer during the cooling process, and cracks, inclusions and defects occur. Therefore, these defects need to be removed before rolling. Heavy-duty, riddled resin wheels (BZZ) are used to quickly remove oxides, cracks and inclusions from surfaces such as slabs, billets and ingots. The grinding wheel has high safety performance, long service life, excellent grinding surface quality and low customer grinding cost.