Refractories for lining of cupola furnaces and other thermal units
Refractories for lining of cupola furnaces and other thermal units
Technical characteristics
Rate for grade | |||||
---|---|---|---|---|---|
ShVG-30 | ShVG-33 | ShVG-35 | MKRVG-45 |
MKVG-72 | |
GOST 3272-2002 |
|||||
Mass fraction, %: Al2O3, minimum |
30 |
33 |
35 |
over 45 |
over 72 |
Refractoriness, °С, minimum | 1670 | 1710 | 1730 | 1750 | n/a |
Compressive strength, N/mm2, minimum | 20 | 22 | 30 | 35 | 35 |
Open porosity, %, maximum | 22 | 21 | 20 | 19 | 24 |
Residual variation of dimensions, %, maximum at: 1400 °C |
±0,4 |
±0,2 |
±0,2 |
±0,4 |
n/a |
Temperature of initial softening, °С, minimum | n/a | 1400 | 1500 |
Form and dimensions
Numbers of brick | Dimensions, mm | Volume, cm3 | Laying radius, mm | |||
---|---|---|---|---|---|---|
a | a1 | б | в | |||
Side arch brick | ||||||
1 | 65±2 | 45±2 | 114±4 | 230±3 | 1440 | 257 |
2 | 65±2 | 55±2 | 114±4 | 230±3 | 1570 | 627 |
8 | 140±3 | 120±3 | 65±2 | 230±4 | 1940 | 390 |
Straight brick | ||||||
3 | 230±4 | - | 114±3 | 65±2 | 1704 | - |
Numbers of brick | Dimensions, mm | Volume, cm3 | Laying radius, mm | |||
---|---|---|---|---|---|---|
a | a1 | б | в | |||
Straight brick | ||||||
4 | 230±4 | 195±4 | 125±3 | 75±2 | 1990 | 696 |
5 | 210±4 | 170±4 | 125±3 | 75±2 | 1780 | 531 |
6 | 230±4 | 205±4 | 150±3 | 80±2 | 2610 | 1230 |
7 | 265±4 | 227±4 | 150±3 | 80±2 | 2950 | 896 |