The magnesia based big brick was produced by using quality fused magnesite with high calcia and low silica, composite additives and composite organic binder.
采用优质电熔高钙低硅镁砂，添加复合外加剂，用复合有机结合剂结合，制成了镁质大砖。
2
Phosphate knock-off core of scrap silicabrick aggregate for steel castings has been developed with experiment method.
研制了以磷酸二氢铝为粘结剂，硅砖粒、粉为骨料的保温冒口易割片。
3
The crack occured in silicabrick generally includes surface crack and layer crack.