棕刚玉以优质铝矾土为原料，无烟煤，铁霄，在电弧中经2000度以上高温熔炼制成，经自磨机粉碎 整形，磁选去铁，筛分成多种粒度，其质地致密、硬度高，粒形成球状，适用于制造陶 瓷、树脂高固结磨具以及研磨、抛光、喷砂、精密铸造等，还可用于制造高级耐火材料 。
| 8 | +4000um | 0 | +2800um | ≤20% | +2360um | ≥45% | +2360+2000um | ≥70% | -1700um | ≤3% |
| 10 | +3350um | 0 | +2360um | ≤20% | +2000um | ≥45% | +2000+1700um | ≥70% | -1400um | ≤3% |
| 12 | +2800um | 0 | +2000um | ≤20% | +1700um | ≥45% | +1700+1400um | ≥70% | -1180um | ≤3% |
| 14 | +2360um | 0 | +1700um | ≤20% | +1400um | ≥45% | +1400+1180um | ≥70% | -1000um | ≤3% |
| 16 | +2000um | 0 | +1400um | ≤20% | +1180um | ≥45% | +1180+1000um | ≥70% | -850um | ≤3% |
| 20 | +1700um | 0 | +1180um | ≤20% | +1000um | ≥45% | +1000+850um | ≥70% | -710um | ≤3% |
| 22 | +1400um | 0 | +1000um | ≤20% | +850um | ≥45% | +850+710um | ≥70% | -600um | ≤3% |
| 24 | +1180um | 0 | +850um | ≤25% | +710um | ≥45% | +710+600um | ≥65% | -500um | ≤3% |
| 30 | +1000um | 0 | +710um | ≤25% | +600um | ≥45% | +600+500um | ≥65% | -425um | ≤3% |
| 36 | +850um | 0 | +600um | ≤25% | +500um | ≥45% | +500+425um | ≥65% | -355um | ≤3% |
| 46 | +600um | 0 | +425um | ≤30% | +355um | ≥40% | 355+300um | ≥65% | -250um | ≤3% |
| 54 | +500um | 0 | +355um | ≤30% | +300um | ≥40% | +300+250um | ≥65% | -212um | ≤3% |
| 60 | +425um | 0 | +300um | ≤30% | +250um | ≥40% | 250+212um | ≥65% | -180um | ≤3% |
| 70 | +355um | 0 | +250um | ≤25% | +212um | ≥40% | +212+180um | ≥65% | -150um | ≤3% |
| 80 | +300um | 0 | +212um | ≤25% | +180um | ≥40% | +180+150um | ≥65% | -125um | ≤3% |
| 90 | +250um | 0 | +180um | ≤20% | +150um | ≥40% | +150+125um | ≥65% | -106um | ≤3% |
| 100 | +212um | 0 | +150um | ≤20% | +125um | ≥40% | +125+106um | ≥65% | -75um | ≤3% |
| 120 | +180um | 0 | +125um | ≤20% | ≥40% | ≥40% | +106+90um | ≥65% | -63um | ≤3% |
| 150 | +150um | 0 | +106um | ≤15% | +75um | ≥40% | +75+63um | ≥65% | -45um | ≤3% |
| 180 | +125um | 0 | +90um | ≤15% | +75um | * | +75+63um | ≥40% | -53um | * |
| 220 | +106um | 0 | +75um | ≤15% | +63um | * | +63+53um | ≥40% | -45um | * |
