Wear-resistant castables for magnesium reduction furnaces are made by adjusting the particle grading on the basis of the traditional castable ratio, adding different chemical admixtures to the castables, and reducing the amount of cement, thereby improving the performance of the castables, increasing the medium-temperature strength and load softening temperature of the castables, reducing the thermal conductivity of the castables, and improving the thermal shock stability of the castables.
Wear-resistant castables for magnesium reduction furnaces have good penetration resistance, corrosion resistance, impact resistance, wear resistance, and mechanical properties, making the furnace structure more integrated and the airtightness better than that of brick-built furnaces, extending the furnace life, saving furnace repair costs, and achieving significant economic benefits.
Construction preparation of wear-resistant castables for magnesium reduction furnaces:
1. The mold should be cleaned and the gaps should be tightly sealed to prevent leakage, so as to avoid the separation of aggregate and powder during casting.
3. The construction environment temperature of the castable must be maintained between 5-40℃. A temperature below 40℃ will cause the castable to solidify too long, and a construction temperature above 40℃ will cause the castable to solidify too quickly.
Product Features
This series of high-strength wear-resistant castables is made of high-quality high-aluminum clinker as aggregate, and is developed by introducing ultrafine powder and high-efficiency water reducing agent. The product has the characteristics of good construction performance, high bonding strength, wear resistance, and good volume stability.
Performance Table
Main physical and chemical indicators of wear-resistant castables
|
project |
HX-MJ65 |
HX-MJ70 |
HX-MJ75 |
HX-MJ80 |
|
|
Al2O3(%)：≥ |
65 |
70 |
75 |
80 |
|
|
Bulk density (g/cm3)：≥ |
2.50 |
2.55 |
2.60 |
2.70 |
|
|
Flexural strength (MPa)：≥ |
110°C x24h |
9 |
9 |
10 |
11 |
|
1000°C x3h |
11 |
11 |
11 |
12 |
|
|
Compressive strength (MPa)：≥ |
110°C x24h |
75 |
75 |
75 |
75 |
|
1000°C x3h |
80 |
85 |
85 |
90 |
|
|
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 |
6 |
6 |
6 |
|
Maximum operating temperature(℃) |
1500 |
1500 |
1500 |
1500 |
|
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