Applications of Roasting and Calcination

Roasting and calcination are processes that have a vast range of applications, few of them are mentioned below:

• Metallurgy: Roasting and calcination plays a vital role in the extraction of metals from their respective ores.

• Mineral Processing: In mineral processing, they are utilized to modify the chemical composition of minerals, making them more amenable to subsequent extraction methods.

• Precious Metal Recovery: Calcination and Roasting are employed in the extraction of precious metals like gold and silver. Ores containing these metals undergo these processes to eliminate impurities and so enhancing the overall efficiency of precious metal recovery.

• Environmental Remediation: They are also used in environmental cleanup efforts, especially for hazardous materials like contaminated soils or solid wastes.

• Pharmaceuticals and Chemicals: Roasting is also used in the pharmaceutical and chemical industres for the synthesis of certain chemicals or to modify the properties of materials through controlled thermal treatment.

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• Extraction of Metals from Ores
• Extraction of Highly Reactive Metals
• Ellingham Diagram

Calcination and Roasting are processes used to convert ore into oxide. The difference between the two is the presence or absence of air. Roasting involves heating ores with oxygen below their melting point in the presence of air. Calcination involves heating ore to a high temperature in the absence of air.

In this article, we will understand what is Calcination and Roasting, their examples, and processes, along with a comparison between calcination and roasting.