棕剛玉是以鋁土礦和焦炭（無菸煤）為主要原料，在2300℃的傾卸爐中冶煉而成。其主要化學成分為Al2O3和TiO2，還含有少量SiO2和Fe2O3等，顯微硬度HV1800-2200。適用於磨削抗拉強度高的金屬，如各種萬能鋼、熟鐵、硬青銅等，也可用於製造高級耐火材料。悅磨俱棕剛玉具有純度高、結晶性好、耐腐蝕、不爆炸、不開裂等特點，耐火溫度可達1900℃以上。
耐火砂 | ||||
粒度 | 氧化鋁 | 二氧化矽 | Fe2O3 | 二氧化鈦 |
0-1mm | >95.2% | <1% | <0.3% | <3.5% |
1-3mm | >95.2% | <1% | <0.3% | <3.5% |
3-5mm | >95.2% | <1% | <0.3% | <3.5% |
200目 | >95.0% | <1% | <0.3% | <3.5% |
325目 | >95.0% | <1% | <0.3% | <3.5% |
磨料砂 | ||||
粒度 | 氧化鋁 | 二氧化矽 | Fe2O3 | 二氧化鈦 |
F8-F220 | >95.2% | <1% | <0.3% | <3.5% |
F240-F400 | >95% | <1% | <0.3% | <3.5% |
F500-F3000 | >95% | <1% | <0.3% | <3.5% |
棕剛玉應用：
1）磨料：生產陶瓷砂輪、樹脂砂輪、磨石、磨塊、砂紙、砂布、砂帶、拋光蠟等。
2）耐火材料：主要用於耐磨、耐高溫，鋼鐵冶金、各種工業爐灶、電爐等異型和不定形耐火材料的氧化骨料和填充。
3）噴砂磨料：主要用於各種材質工件的去污、除鏽、防腐蝕、去除氧化皮等。
4) 耐磨性
5) 精密鑄造： 投資領域：主要用於機場和道路的防滑，化工廠板鋪裝。不銹鋼和鋁鑄件的塗裝鑄造工藝。
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