grinding ceramic balls 1)high silica 2)grind media 4)good hardness 5)competitive price Grinding Ceramic Ball 1.Product:Pebbles/Man made pebbles/ ... products are used as grind medium in ceramic industry,high sio2,good hardness,abrasion proof,acid resistance and alk ali ... areregarded as the most economical medium of milling,for grinding raw material such assand,zirconium silicate,feldspar,kaolin,clay, ...