Steel fiber reinforced wear-resistant castables are made of brown corundum, silicon carbide and bauxite as the main raw materials. They are made of 1-12mm aggregate, powder and pure calcium aluminate cement. The addition of steel fiber not only has strong wear resistance, but also strong erosion resistance.
The use environment of steel fiber reinforced wear-resistant castables is mainly for various feed ports, discharge ports, various flue linings, etc. They have high requirements for wear resistance. In order to extend the service life of the lining, it is necessary to choose high-quality wear-resistant castables.
Steel fiber reinforced wear-resistant castables must not only be wear-resistant, but also be thermal shock-resistant. When adding or discharging materials, the temperature fluctuates greatly and the thermal stress generated is strong. It is not enough to only choose wear-resistant ones. They must also have excellent thermal shock resistance. Steel fiber wear-resistant castables can be selected as linings, which have better use effects;
Steel fiber reinforced wear-resistant castable linings must not only withstand the erosion of various high-temperature gases and materials, but also have the characteristics of high temperature resistance and chemical corrosion resistance. At this time, corundum wear-resistant castable linings or high-aluminum wear-resistant castables with an aluminum content of about 75% can be selected;
Steel fiber reinforced wear-resistant castables The flues of various high-temperature kilns are mainly damaged by various airflows and chemical erosions. The use temperatures are different. At this time, there is no need to choose corundum wear-resistant castables. According to the analysis of the specific use temperature and the corrosive medium, it is more appropriate to choose high-aluminum wear-resistant castables that are wear-resistant and resistant to acid and alkali corrosion.
Product Features
Steel fiber reinforced wear-resistant castables are made by introducing heat-resistant steel fibers. The shape of steel fiber reinforced wear-resistant castables with heat-resistant steel fibers is similar to a boat-shaped sagger. Its specifications are cross-section 0.2mmx1.0mmm, length 20mm, 25mm, 30mm and 35mm; the grades of heat-resistant steel fibers are divided into 330, 310, 304, 446 and 430 according to the international heat-resistant steel fiber grades. The steel grades similar to the national standard (GB) are 1Cr15Ni36W3Ti, 1Cr25Ni20Si2, 1Cr18Ni9, 1Cr25Si2 and 1Cr18Si2, which greatly enhances the thermal shock stability of the wear-resistant castable. The product has high wear resistance, thermal shock stability and volume stability.
Performance Table
Main physical and chemical indicators of steel fiber reinforced wear-resistant castables
|
project |
HX-GMJ65 |
HX-GMJ70 |
HX-GMJ75 |
HX-GMJ80 |
|
|
Al2O3(%)：≥ |
65 |
70 |
75 |
80 |
|
|
Bulk density (g/cm3)：≥ |
2.50 |
2.55 |
2.60 |
2.70 |
|
|
Flexural strength (MPa)：≥ |
110°C x24h |
10 |
10 |
11 |
11 |
|
1000°C x3h |
11 |
12 |
12 |
12 |
|
|
Compressive strength (MPa)：≥ |
110°C x24h |
70 |
75 |
80 |
80 |
|
1000°C x3h |
80 |
85 |
85 |
85 |
|
|
Line change rate (%) |
1000°C x3h |
0~-0.5 |
0~-0.5 |
0~-0.5 |
0~-0.5 |
|
Thermal shock resistance (times) :≥ |
900°C 水冷 |
25 |
25 |
25 |
25 |
|
Wear at normal temperature (cm3)：≤ |
900°C x3h |
6 |
|||
|
Maximum operating temperature (℃) |
1500 |
||||
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