High-strength KS wear-resistant refractory plastic is made of corundum, silicon carbide, and super-high alumina clay as the main raw materials, with ultrafine powder, composite binder, additives, and plasticizer. KS series wear-resistant refractory plastic has good plasticity, long shelf life, and its strength increases with temperature, ensuring that the plastic has high strength and wear resistance. It is easy to construct, quick to repair, high-strength wear-resistant, good thermal shock resistance, no cracking, and good sealing. It is suitable for CFB boiler lining construction and rapid repair.
Regarding the volume stability of plastic, it is measured by the linear change rate, where the maximum temperature when the linear change rate is ±2% is equivalent to the maximum use temperature of the plastic.
The performance of plastic, plastic is a refractory material that is pre-mixed with refractory aggregate, clay mineral, and binder into a mud state, and then rammed into shape with a hammer or air hammer. The quality of plastic construction has a great impact on its service life. The quality of construction performance is related to the operation rate of furnace construction. Construction performance changes with the type and quantity of clay minerals, additives, and the amount of water added. In order to achieve good construction performance, when the amount of clay added and the amount of water are increased, shrinkage will increase, so attention must be paid.
Plastics need to be stored carefully, and it is best to store them in a cold and dark place. When stored in a high temperature place, even a short time will deteriorate their construction performance.
When drying, as free water is removed, the drying shrinkage is large. In order to prevent irregular cracking caused by shrinkage after construction, expansion joints need to be left, so they are cut with a trowel, etc., with a depth of about 1/3 from the surface and an interval of about 1 meter. In order to slowly remove free water, it is necessary to nail several exhaust holes on the surface with nails.
Main physical and chemical properties of KS series plastics (high aluminum)
|
Index project |
KS-1 |
KS-2 |
|
|
Al2O3 content %≥ |
75 |
60 |
|
|
Bulk density g/cm³≥ |
1000℃×3h |
2.75 |
2.35 |
|
Normal temperature compressive strength Mpa,≥ |
110℃×24h |
45 |
35 |
|
1000℃×3h |
90 |
80 |
|
|
Flexural strength at room temperature Mpa,≥ |
110℃×24h |
8.6 |
6.9 |
|
1000℃×3h |
>11.7 |
>11.7 |
|
|
Line change rate after burning % |
1000℃×3h |
±0.5 |
±0.5 |
|
Wear resistance cm³≤ |
1000℃×3h |
5.0 |
6.0 |
|
Thermal shock stability,≥ |
1000℃ water cooling |
28 |
26 |
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