How the foundry ceramic sand helps the foundry plant
Foundry ceramic sand is a kind of aluminum oxide-based foundry beads. It is made from bauxite by a fusing & blowing process. The foundry beads are of solid ball shape. That led to some specific extraordinary features for the foundry production. It can help foundry plants to get better appearance castings and make the work more efficient.
Foundry ceramic sand has the following advantages compared to silica sand:
The particle shape is spherical, with a smooth surface and almost no dust content. Under the same strength requirements, the amount of adhesive gets lower by at least half compared to silica sand.
The fire resistance is higher than that of silica sand and is neutral, and suitable for various casting alloys, including carbon steel, low alloy steel, stainless steel, high manganese steel, high chromium alloy, etc.
It has better flowability than silica sand and is easy to fill. It can be used to make cores with complex shapes and thinner wall thicknesses.
Higher strength and lower crushing rate than silica sand. High durability and regeneration recovery rate, with regeneration recovery, reaching 99%.
The expansion coefficient of ceramic sand is very low, and it is linear expansion, without rapid volume expansion and phase change, reducing casting defects such as veins in the core.
Ceramic sand also has advantages such as high thermal conductivity, good breathability, and good collapsibility after casting.
With the resin-coated casting process, reclaimed foundry ceramic beads get high strength even after regeneration. So it can help foundries to run more efficiently in the following aspects: