30-60 Mesh High-alumina Casting Sands With Low Thermal Expansion Coefficient Precision Investment

1. Description:

a. Our products are made of mullite or kaolin raw ore.

b. The density of mullite, the raw material of casting sand, is usually greater than 2.5g / m3, the true specific gravity is 2.6g / cm3, the water content is less than 0.03%, and the fire resistance is greater than 1750 ° C.

c. The weight of mullite will be reduced by 0.3% to not more than 0.4% under the condition of high temperature combustion, which indicates that the chemical properties of mullite are stable.Its pH is between 7 and 9, and the hardness of the shell is greater than 8 MPa.The alumina content in the foundry sand is between 42% and 46%, and the silica content is between 51% and 53%.All above make our high-alumina precision investment casting sand keep low thermal expansiion coefficient and make the shell keep good shape.

d. The grain size and application of mullite for casting sand are different. Mullite is made from kaolin by high temperature sintering. The chemical composition of mullite is a chemical substance with strong fire resistance, and its performance is relatively stable.

e. To make the shell,in the back layer slurry, 200 mesh mullite and silica sol are needed, and 30-60 mesh mullite is added to the slurry.

2. Technical Indicators

3. Product Application:

More Products Pictures

1. 30-60Mesh Grade Ⅰ

2. 30-60Mesh Grade Ⅱ

3. 30-60 Mesh Grade Ⅲ

Our mine company established in 2003,and its trade company ,Qingdao Jinjunxuan International Trade Co.,Ltd,founded in 2018, relying on the group's logistics advantages and rubber trade experience, Jinjunxuan international has been shouldering the responsibility of group logistics business development and model transformation since its establishment.

In 2019,  In view of the fierce competition in the raw material market, we pay more attention to the quality of products and firmly believe in the concept of "quality-oriented, honest operation". We also rely on  mine company technical advantage to develop customized products.

Using our product, the casting is easy to be shelled, not deformed, not easy to shrink, with good finish and high yield. After that, remind the customer not to be greedy for cheap choice of cheap sand so as not to affect the casting finished products.

It is recommended to choose the products of regular mullite manufacturers with reasonable price, quality and more guarantee. We hope that through our efforts and careful service, we can provide customers with cost-effective products and contribute to the development of the investment casting industry.