granular sulphur

The granulation process uses a size enlargement process to transform molten sulfur into dense spherical solid granules. Small particles of sulfur (seed) are introduced at the feed end of the drum and are sprayed and coated with molten sulfur as the product moves toward the drum discharge. Each applied layer is cooled to solidification before another coat of molten sulfur is applied. With repeated application, bonding and then cooling of successive coats, the seedsincrease in volume and weight until they reach the desired granule size, usually 1 to 6 mm in diameter. A screening process separates undersize granules from the product size granules, which allows the undersize to be recycled to the drum inlet as seeds.