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Plastic Raw Materials
Plastic is a kind of unshaped refractory material, which is prepared from 70% to 80% of granular and powdery materials plus 10% to 25% of plastic clay and other binders and an appropriate amount of plasticizer.
Description
1.Product Description
Plastic clay is an important component of plastic, it only accounts for 10% to 25% of the total weight of plastic, but it is stable to the bonding strength of plastic and its hardened body, the plasticity of plastic, and the volume of plastic and its hardened body. Both properties and fire resistance have a great impact.
The main components of plastic refractories are granular and powdery materials, accounting for 70% to 85% of the total. It can be made of refractory materials of various materials, and is often classified and named according to the material. Since this unshaped refractory material is mainly used in various heating furnaces that are not in direct contact with the molten material, clay clinker and high-aluminum clinker are generally used, and lightweight granular materials are usually used for the preparation of lightweight plastics.
2.Technical parameter
Item/Index/Brand | NMK-70 | NMK-75 |
Chemical composition% Al2O3≥ | 70 | 75 |
SiO2≤ | 1.5 | 1.3 |
Bulk density,g/cm3,≥110℃×24h | 2.55 | 2.75 |
CCS,MPa,≥110℃×24h | 30 | 35 |
1100℃×3h | 65 | 75 |
MOR,MPa,≥110℃×24h | 1.5 | 5.5 |
1100℃×3h | 11 | 12.5 |
Thermal shock stability(water cycle),≥1000℃ | 20 | 20 |
Plastic index,% | 16-38 | 16-38 |
CWT(cm3),≤ | 10 | 7.5 |
Thermal conductivity(W/m.k),≤ | 1.5 | 1.5 |
Refractoriness(℃),≥ | 1770 | 1790 |
RUL,(℃),≥ | 1400 | 1430 |
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