規格 特徵： 1. 加熱體積穩定性 2. 高導熱性 3、耐鹼性強 4.固相燒結，不粘砂 鉻鐵砂的優勢 與硅砂相

Ceramic sand has excellent properties, including spherical shape, high refractoriness, good crush resistance, inert chemical characteristics, high reclamation yields.