Castables and masses
Gunning masses
|
Indicators |
Norm |
|
|
Mass fraction of component per calcined substance, % MgO, no less CaO, no more Fe2O3, no more SiO2, no more Al2O3, no more Relative change in mass during ignition, %, no more |
55,0 4,0 6,0 32,0 1,5 4,0 |
75,0 6,0 2,0 15,0 1,1 4,0 |
|
Grain composition, mm, no more |
1 |
|
|
Mass fraction of moisture, %, no more |
0,5 |
|
|
Bulk density, kg/m3, no more |
2 200 |
|
|
Fire resistance, °C, not less |
1750 |
|
|
Maximum application temperature, °C |
1750 |
|
Castable
|
Indicators |
Norm |
|||
|
Mass fraction of component, % |
|
|
|
|
|
Al2O3+MgO, no less |
92 |
|
|
|
|
Al2O3, not less (within limits) |
|
80 |
65 |
(64-74) |
|
CaO, no more |
2,1 |
4,0 |
3,0 |
1,8 |
|
Fe2O3, no more |
|
|
3,0 |
1,5 |
|
Cr2O3, no less |
|
2,0 |
|
|
|
SiO2, within |
|
|
|
2,0-9,0 |
|
SiC, within |
|
|
|
15-19 |
|
С, within |
|
|
|
2,5-4,3 |
|
Ultimate compressive strength after heat treatment, MPa, not less, at temperature: 1000 °С 1300 °С 1400 °С 1500 °С |
50 |
60 |
65 |
45 |
|
Apparent density after heat treatment, g/cm3, at temperature 1000 °С 1300 °С 1500 °С |
2,85 |
3,0 |
|
2,9 |
|
Open porosity after heat treatment, %, no more, at a temperature of 450 °C |
18 |
|
18 |
16 |
|
Grain composition, mm |
|
|
|
0-10 |
|
Remaining on grid No. 8, %, no more |
10 |
|
|
|
|
Remaining on grid No. 7, %, no more |
|
|
15 |
|
|
Passage through mesh No. 063, %, no less |
15 |
|
25 |
|
|
Maximum application temperature, °C |
1700 |
|
1600 |
1700 |
