System for drying or calcining bulk materials especially pigments, foodstuffs, spices and particles recovered from suspension, comprises passing material on conveyor or in washing stream past near infra-red radiator

摘要

System for drying or calcining bulk materials (5, 5'), especially pigments, foodstuffs, spices and particles recovered from suspension, comprises passing the material on a conveyor (3) or in a washing stream past an infra-red radiator (7) emitting radiation of wavelength 0.8-1.5 microns.