Why Fused Ceramic Sand is a Better Choice for Foundry?

What is Fused ceramic sand?

Fused ceramic sand, also known as electric fused ceramsite, ceramsite sand, nice foundry sand, and its scientific name 'fused ceramic sand', has the advantages of high temperature resistance, non-crushing, no dust, spherical, high permeability, good filling performance, and no silica dust hazards. It is a green casting sand for environmental protection.


Silica sand is cheaper, why use fused ceramic sand?

The advantages of silica sand are wide distribution and low price, but its shortcomings are also quite obvious: first, the expansion coefficient is high and the casting accuracy is low. Second, the surface of the casting is seriously bonded with sand, which is difficult to clean. The reason is that there are many kinds of homogeneous and heterogeneous crystals in silica at different temperatures, and the volume changes greatly. Due to the limitation of fire resistance (the fire resistance of quartz sand is between 1400-1700 ℃), sand sticking is serious in some parts of the casting (holes, grooves, and hot spots), which is very difficult to clean. These shortcomings are particularly serious in the production of large steel castings.


Fused ceramic sand can overcome these shortcomings and greatly improve the quality of castings.


Fused ceramic sand is made of high-quality bauxite through calcination, electrofusion, granulation, screening and other processes.


Characteristics of Fused ceramic sand

The thermal expansion coefficient is small, and the performance is comparable to that of zircon sand. When using it to prepare molding sand, the casting will not produce expansion defects. The sand particles are spherical, with good fluidity, easy compaction and good air permeability. The surface is smooth and the structure is compact, so that the adhesive can be evenly covered.

Fused ceramic sand is a neutral material and can be used as acid or alkali binder. Good recycling performance and high cost performance. Compared with chromite sand and zircon sand, its price is only 25-50% of zircon sand and chromite sand. At the same time, because the sand is spherical and its surface area is small, the amount of resin added can be reduced by 30-50%, and the amount of sodium silicate added ≤ 4%; The casting defects caused by binder are reduced and the yield of castings is improved. High fire resistance and easy to collapse, the mullite phase of Fused ceramic sand is much higher than that of sintered products and has good fire resistance. High thermal conductivity, good stability and no cracking.


Fused ceramic sand's Wide application range


Sodium silicate sand, resin sand, precision casting and polishing and cleaning of copper and aluminum parts.