Aluminum silicate plugging sleeve is sometimes also called asbestos plug and insulation cap for the outlet of the aluminum-copper-zinc smelting furnace. It is mainly made of high-grade aluminum silicate ceramic fibers and other formulas by vacuum forming. It has tough texture, high compressive strength, low heat storage and low heat loss. It is suitable for aluminum, copper and zinc centralized melting furnaces, refining furnaces, static furnaces, and electric furnaces. The excellent heat insulation and sealing effect of the water outlet makes the casting process of aluminum-copper-zinc and aluminum-copper-zinc alloy more convenient, safer and more reliable.
Item | Common grade | Standard grade | High pure grade |
High alumina Grade |
Zirconium grade |
Working temperature | ≤1000°C | ≤1050°C | ≤1100°C | ≤1200°C | ≤1350°C |
AL2O3 | 44% | 46% | 47-49% | 52-55% | 39-40% |
AL2O3+SiO2 | 96% | 97% | 99% | 99% | 82-84% |
ZrO2 | - | - | - | - | 15-17% |
AL2O3+SiO2+ZrO2 | - | - | - | - | 99% |
Fe2O3 | ≤1.2% | ≤1.0% | ≤0.2% | ≤0.2% | ≤0.2% |
Na2O+K2O | ≤0.5% | ≤0.5% | ≤0.2% | ≤0.2% | ≤0.2% |
We can produce different sizes of cones according to the customer’s requirement. |
1.Tough texture and strong wind erosion resistance.
2.No gap lining; low heat storage, less heat loss.
3.Direct contact with flame for hot surface.
4.Excellent construction and installation performance.
5.Excellent thermal shock resistance.
6.High compressive strength and long service life.
7.The sound absorption effect is remarkable.
Typical applications: industrial furnace observation hole, thermometer insertion hole; industrial furnace burner, furnace door; non-ferrous metal melting ditch, groove lining, casting cap mouth; mechanical and electrical equipment connection gasket.