一、前言有色金属精矿干燥,多年来在固定式燃烧炉床手烧或机械加煤烧优质煤,热效率很低,燃烧时机械损失大。为了提高热利用率和扩大能源,磐石扩建工程精矿干燥设计,采用沸腾燃烧工艺和运输条件方便的当地劣质褐煤代替多年在固定式炉床上手烧褐煤。但由于炉床燃 I. Preface The non-ferrous metal concentrate is dry. Over the years, high-quality coal is burned by hand in fixed combustion furnace bed or coal with mechanical properties. The thermal efficiency is very low and the mechanical loss during burning is large. In order to improve heat utilization and expand energy, the Rock Drying Project concentrates dry design, instead of burning lignite for many years on fixed hearths using boiling combustion process and local inferior lignite with convenient transportation conditions. However, due to burning hearth