Sell refractory material 30/50mesh alumina sand

Specifications for the Product:
1. Main Chemical Composition: Al2O3: 65~80% ,Fe2O3≤3% K2O≤0.5%

2. Shape: Sphere, Angle Factor ≤ 1.1

3. Refractoriness: 1825ºC

4. pH: 7.6-7.8

5. Thermal Expansion Rate: 0.13% (10 minutes under 1000 oC)

6. Mineral Phase: Mullite Phase≥85%, Corundum phase + Glass phase ≤15%

7. Bulk Specific Weight: 1.95~2.05(g/cm³)

8. Mohs hardness: 7.5-7.8

Features of Ceramic Sand

1. High Refractoriness
Refractoriness: ≥1800oC, same level with magnesite and chromite sand, and higher than silica sand, with less sand burning.

2. Low Expansion Rate
Better than magnesite, chromite sand and silica sand, could meet higher accuracy requirement.

3. Low Breakage Rate
Moh's hardness of ceramic Sand being 7.8, and the spherical shape, make it hard to break ceramic Sand.

4. pH: 7.0 - 7.8
As a neutral material, Ceramic Sand is suitable for different kinds of alkalinity or acidity adhesive. For example: water glass, clay, resin curing agent.

5. Good Spherical shape
The shape of Ceramic Sand is spherical and the angle factor is less than or equal to 1.1. With smooth surface and perfect shape, Ceramic Sand has smallest superficial area, making the volume added to adhesive and curing agent much less (average 40% - 50% less).

6. Proportion
As a kind of special artificial sand, the bulk specific weight of Ceramic Sand is smaller than magnesite and chromite sand. The reduction of the casting model and increased ratio of the iron sand will help to lower the production cost.

7.Pollution-free
Compared to the radioactivity of zircon sand and the pollution of chromite sand (some countries have forbidden the use of chromite sand), Ceramic Sand is a more environmental friendly material, with higher re-use ratio and lower discharge.