What are the common artificial sands?
This article briefly introduces the development and application of artificial sand for casting. The raw materials, production process, physical and chemical properties and application of artificial sand for casting such as Fused Ceramic Sand, CB sand, spherical sand and ceramsite sand were introduced. Artificial sand for casting has the advantages of high refractoriness, good grain shape, low coefficient of thermal expansion and near neutral chemical properties, which can be applied to almost all sand casting.
Why is artificial sand needed to replace silica sand?
Silica sand has been the most important basic material for molding and core making for a long time because of its rich sources, high refractoriness, and non-wetting with metal melt. Silica sand still accounts for more than 90% of the raw sand for casting. With the continuous improvement of requirements for casting quality, comprehensive cost control and environmental protection, the inherent disadvantages of silica sand (including high-purity silica sand and calcined silica sand) are becoming more and more prominent: poor thermal stability, easy to form vein defects; At high temperature, it is easy to react with iron oxide to form iron olivine, resulting in sand sticking; It is difficult to adapt to the casting of medium high alloy steel and high manganese steel because of its low fire resistance and easy slag formation by reaction with manganese oxide; It is easy to break, and the SiO2 dust generated after breathing may cause workers to suffer from pneumoconiosis.
Production method, chemical composition and mineral phase of several common artificial Sands
Production methods of common artificial special sand - Fused Ceramic Sand
Fused Ceramic sand was first developed and popularized at the end of the 20th century or the beginning of the 21st century. Although there are many commodity names on the market, as long as it is made of high-quality bauxite (Al2O3 content 65% - 85%) as raw material, through arc melting and air crushing into balls, it is the category of Fused Ceramic sand.
The manufacturing method of Fused Ceramic sand is to select high-quality bauxite raw materials and melt them in an electric arc furnace. When the molten liquid flows out of the furnace, it is blown away with compressed air flow, and then cooled to obtain spherical or nearly spherical particles with smooth surface.
Production process of Fused Ceramic sand: bauxite → simple crushing → arc melting → air crushing into balls → screening → mixing → finished Fused Ceramic Sand.
Ceramic Sand Manufacturers and Suppliers in China
Sanmenxia Qiangxin Foundry Material Co., Ltd. (fusedceramicsand.com) is specialized in the production and sales of high-end casting new material - fused ceramic sand for foundry which is a professional manufacturer for foundry industries.
Ceramic Foundry Sand and Coated Foundry sand are widely used in metal foundry molding and casting industries including lost foam casting, V-process Casting, Alkaline Phenolic Resin no-bake sand, and more.
Get in touch with Fused Ceramic Sand Engineers right now for any and all of your foundry ceramic sand needs!
Email: sales@fusedceramicsand.com
Mobile: +86 15703799093