Waste Foundry Sand

Waste Foundry Sand Latest News

Recently, the Institute of Indian Foundrymen (IIF) and CSIR-Central Road Research Institute (CSIR-CRRI) entered into an agreement to develop and facilitate solutions for the utilisation of waste foundry sand in road construction.

About Waste Foundry Sand

• It is a byproduct from the production of both ferrous and nonferrous metal castings.
• It is high quality silica sand.
• The physical and chemical characteristics of foundry sand depend upon the type of casting process and the type of industries.
• Classification of foundry sands depends upon the type of binder systems used in metal casting.
• Two types of binder systems are generally used, and on the basis of that foundry sands are categorized as: clay-bonded sands (green sand) and chemically bonded sands.
• Clay-bonded (Green) sand is composed of naturally occurring materials which are blended together; high quality silica sand (85–95%), bentonite clay (4–10%) as a binder
• Chemically bonded sands are used both in core making where high strengths are necessary to withstand the heat of molten metal, and in mold making.
• Waste Foundry Sand poses environmental challenges due to its large-scale generation and disposal requirements.
• Significance: Its reuse aligns with national priorities on resource efficiency, waste minimization, and sustainable development.

Source: Integrating Industrial Waste into Road Construction is Key to India’s Circular Economy Vision – Dr. N. Kalaiselvi

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