|
种类
性能 |
普通耐火球
|
氧化铝耐火球
|
刚玉耐火球
|
99%刚玉球(低硅球)
|
|
|
化学成份 %
|
Al 2O3
|
23-42
|
45-75
|
90-98
|
≥99
|
|
SiO 2
|
50-70
|
45-18
|
0.5-5.0
|
≤0.3
|
|
|
Fe2O3
|
≤1.2
|
≤1.0
|
≤0.5
|
≤0.1
|
|
|
耐火度,℃
|
1300~1420
|
1350~1650
|
≥1700
|
≥1850
|
|
|
耐急变温差,℃
|
600
|
|
800
|
800
|
|
|
抗压强度,N
|
100-20000 依品种和规格而异
|
||||
|
莫氏硬度,scal
|
≥6.5
|
≥7.0
|
≥8
|
≥9
|
|
|
耐酸度,%
|
≥99.8
|
≥99.5
|
≥99
|
≥98
|
|
|
耐碱度,%
|
≥85
|
≥90
|
≥95
|
≥97
|
|
|
堆重 ,kg/m3
|
1250-1420
|
1300-1700
|
1750-2000
|
1950-2200
|
|
|
直径 r, Ф
|
6
|
8
|
10
|
13
|
16
|
20
|
25
|
30
|
38
|
50
|
60
|
75
|
|
直径允差 ,mm
|
±1.0
|
±1.5
|
±2.0
|
±3.0
|
||||||||
|
开孔孔径 e,mm
|
2-3
|
3-5
|
5-8
|
8-10
|
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