一、有关情况 1.精矿性质及干燥流程入选矿石经一段磨矿到细度-200目占50％左右,采用优先浮选,依次选出铅、锌、萤石精矿。萤石浮选分三个系统,其精矿品位Ca F_2约95～96％细度-200目约占65％。干燥采用φ1.5×12.0米直接加热逆流式圆筒干燥机3台,分别干燥三个系统的萤石精矿。生产操作指标见图纸部分。 First, the situation 1. The nature of the concentrate and drying process selected ore by grinding to a fineness of -200 head about 50%, the use of priority flotation, followed by the election of lead, zinc, fluorite concentrate. Fluorite flotation divided into three systems, the concentrate grade Ca F_2 about 95 ~ 96% fineness-200 heads account for about 65%. Drying using φ1.5 × 12.0 m direct heating counter-flow drum dryer 3, respectively, three systems dried fluorite concentrate. Production operation indicators see the drawing section.