Muffle Furnace Manufacturers in Gujarat Brand: Hema A muffle furnace can be used for a variety of thermal processes, including calcination, sintering, and drying. In calcination, materials are heated to high temperatures to drive off volatile components, leaving behind a solid residue. This process is commonly used in the production of metals, minerals, and ceramics. Sintering, on the other hand, involves heating powdered materials to a temperature just below their melting point to fuse them into a solid mass. Drying is a simpler process where moisture is removed from materials by applying heat.